Index: head/sys/powerpc/booke/pmap.c =================================================================== --- head/sys/powerpc/booke/pmap.c (revision 359791) +++ head/sys/powerpc/booke/pmap.c (revision 359792) @@ -1,3090 +1,3093 @@ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (C) 2007-2009 Semihalf, Rafal Jaworowski * Copyright (C) 2006 Semihalf, Marian Balakowicz * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * Some hw specific parts of this pmap were derived or influenced * by NetBSD's ibm4xx pmap module. More generic code is shared with * a few other pmap modules from the FreeBSD tree. */ /* * VM layout notes: * * Kernel and user threads run within one common virtual address space * defined by AS=0. * * 32-bit pmap: * Virtual address space layout: * ----------------------------- * 0x0000_0000 - 0x7fff_ffff : user process * 0x8000_0000 - 0xbfff_ffff : pmap_mapdev()-ed area (PCI/PCIE etc.) * 0xc000_0000 - 0xc0ff_ffff : kernel reserved * 0xc000_0000 - data_end : kernel code+data, env, metadata etc. * 0xc100_0000 - 0xffff_ffff : KVA * 0xc100_0000 - 0xc100_3fff : reserved for page zero/copy * 0xc100_4000 - 0xc200_3fff : reserved for ptbl bufs * 0xc200_4000 - 0xc200_8fff : guard page + kstack0 * 0xc200_9000 - 0xfeef_ffff : actual free KVA space * * 64-bit pmap: * Virtual address space layout: * ----------------------------- * 0x0000_0000_0000_0000 - 0xbfff_ffff_ffff_ffff : user process * 0x0000_0000_0000_0000 - 0x8fff_ffff_ffff_ffff : text, data, heap, maps, libraries * 0x9000_0000_0000_0000 - 0xafff_ffff_ffff_ffff : mmio region * 0xb000_0000_0000_0000 - 0xbfff_ffff_ffff_ffff : stack * 0xc000_0000_0000_0000 - 0xcfff_ffff_ffff_ffff : kernel reserved * 0xc000_0000_0000_0000 - endkernel-1 : kernel code & data * endkernel - msgbufp-1 : flat device tree * msgbufp - kernel_pdir-1 : message buffer * kernel_pdir - kernel_pp2d-1 : kernel page directory * kernel_pp2d - . : kernel pointers to page directory * pmap_zero_copy_min - crashdumpmap-1 : reserved for page zero/copy * crashdumpmap - ptbl_buf_pool_vabase-1 : reserved for ptbl bufs * ptbl_buf_pool_vabase - virtual_avail-1 : user page directories and page tables * virtual_avail - 0xcfff_ffff_ffff_ffff : actual free KVA space * 0xd000_0000_0000_0000 - 0xdfff_ffff_ffff_ffff : coprocessor region * 0xe000_0000_0000_0000 - 0xefff_ffff_ffff_ffff : mmio region * 0xf000_0000_0000_0000 - 0xffff_ffff_ffff_ffff : direct map * 0xf000_0000_0000_0000 - +Maxmem : physmem map * - 0xffff_ffff_ffff_ffff : device direct map */ #include __FBSDID("$FreeBSD$"); #include "opt_ddb.h" #include "opt_kstack_pages.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "mmu_if.h" #define SPARSE_MAPDEV #ifdef DEBUG #define debugf(fmt, args...) printf(fmt, ##args) #else #define debugf(fmt, args...) #endif #ifdef __powerpc64__ #define PRI0ptrX "016lx" #else #define PRI0ptrX "08x" #endif #define TODO panic("%s: not implemented", __func__); extern unsigned char _etext[]; extern unsigned char _end[]; extern uint32_t *bootinfo; vm_paddr_t kernload; vm_offset_t kernstart; vm_size_t kernsize; /* Message buffer and tables. */ static vm_offset_t data_start; static vm_size_t data_end; /* Phys/avail memory regions. */ static struct mem_region *availmem_regions; static int availmem_regions_sz; static struct mem_region *physmem_regions; static int physmem_regions_sz; #ifndef __powerpc64__ /* Reserved KVA space and mutex for mmu_booke_zero_page. */ static vm_offset_t zero_page_va; static struct mtx zero_page_mutex; /* Reserved KVA space and mutex for mmu_booke_copy_page. */ static vm_offset_t copy_page_src_va; static vm_offset_t copy_page_dst_va; static struct mtx copy_page_mutex; #endif static struct mtx tlbivax_mutex; /**************************************************************************/ /* PMAP */ /**************************************************************************/ static int mmu_booke_enter_locked(mmu_t, pmap_t, vm_offset_t, vm_page_t, vm_prot_t, u_int flags, int8_t psind); unsigned int kptbl_min; /* Index of the first kernel ptbl. */ static uma_zone_t ptbl_root_zone; /* * If user pmap is processed with mmu_booke_remove and the resident count * drops to 0, there are no more pages to remove, so we need not continue. */ #define PMAP_REMOVE_DONE(pmap) \ ((pmap) != kernel_pmap && (pmap)->pm_stats.resident_count == 0) #if defined(COMPAT_FREEBSD32) || !defined(__powerpc64__) extern int elf32_nxstack; #endif /**************************************************************************/ /* TLB and TID handling */ /**************************************************************************/ /* Translation ID busy table */ static volatile pmap_t tidbusy[MAXCPU][TID_MAX + 1]; /* * TLB0 capabilities (entry, way numbers etc.). These can vary between e500 * core revisions and should be read from h/w registers during early config. */ uint32_t tlb0_entries; uint32_t tlb0_ways; uint32_t tlb0_entries_per_way; uint32_t tlb1_entries; #define TLB0_ENTRIES (tlb0_entries) #define TLB0_WAYS (tlb0_ways) #define TLB0_ENTRIES_PER_WAY (tlb0_entries_per_way) #define TLB1_ENTRIES (tlb1_entries) static tlbtid_t tid_alloc(struct pmap *); #ifdef DDB #ifdef __powerpc64__ static void tlb_print_entry(int, uint32_t, uint64_t, uint32_t, uint32_t); #else static void tlb_print_entry(int, uint32_t, uint32_t, uint32_t, uint32_t); #endif #endif static void tlb1_read_entry(tlb_entry_t *, unsigned int); static void tlb1_write_entry(tlb_entry_t *, unsigned int); static int tlb1_iomapped(int, vm_paddr_t, vm_size_t, vm_offset_t *); static vm_size_t tlb1_mapin_region(vm_offset_t, vm_paddr_t, vm_size_t, int); static __inline uint32_t tlb_calc_wimg(vm_paddr_t pa, vm_memattr_t ma); static vm_size_t tsize2size(unsigned int); static unsigned int size2tsize(vm_size_t); static unsigned long ilog2(unsigned long); static void set_mas4_defaults(void); static inline void tlb0_flush_entry(vm_offset_t); static inline unsigned int tlb0_tableidx(vm_offset_t, unsigned int); /**************************************************************************/ /* Page table management */ /**************************************************************************/ static struct rwlock_padalign pvh_global_lock; /* Data for the pv entry allocation mechanism */ static uma_zone_t pvzone; static int pv_entry_count = 0, pv_entry_max = 0, pv_entry_high_water = 0; #define PV_ENTRY_ZONE_MIN 2048 /* min pv entries in uma zone */ #ifndef PMAP_SHPGPERPROC #define PMAP_SHPGPERPROC 200 #endif static vm_paddr_t pte_vatopa(mmu_t, pmap_t, vm_offset_t); static int pte_enter(mmu_t, pmap_t, vm_page_t, vm_offset_t, uint32_t, boolean_t); static int pte_remove(mmu_t, pmap_t, vm_offset_t, uint8_t); static pte_t *pte_find(mmu_t, pmap_t, vm_offset_t); static void kernel_pte_alloc(vm_offset_t, vm_offset_t); static pv_entry_t pv_alloc(void); static void pv_free(pv_entry_t); static void pv_insert(pmap_t, vm_offset_t, vm_page_t); static void pv_remove(pmap_t, vm_offset_t, vm_page_t); static void booke_pmap_init_qpages(void); static inline void tlb_miss_lock(void); static inline void tlb_miss_unlock(void); #ifdef SMP extern tlb_entry_t __boot_tlb1[]; void pmap_bootstrap_ap(volatile uint32_t *); #endif /* * Kernel MMU interface */ static void mmu_booke_clear_modify(mmu_t, vm_page_t); static void mmu_booke_copy(mmu_t, pmap_t, pmap_t, vm_offset_t, vm_size_t, vm_offset_t); static void mmu_booke_copy_page(mmu_t, vm_page_t, vm_page_t); static void mmu_booke_copy_pages(mmu_t, vm_page_t *, vm_offset_t, vm_page_t *, vm_offset_t, int); static int mmu_booke_enter(mmu_t, pmap_t, vm_offset_t, vm_page_t, vm_prot_t, u_int flags, int8_t psind); static void mmu_booke_enter_object(mmu_t, pmap_t, vm_offset_t, vm_offset_t, vm_page_t, vm_prot_t); static void mmu_booke_enter_quick(mmu_t, pmap_t, vm_offset_t, vm_page_t, vm_prot_t); static vm_paddr_t mmu_booke_extract(mmu_t, pmap_t, vm_offset_t); static vm_page_t mmu_booke_extract_and_hold(mmu_t, pmap_t, vm_offset_t, vm_prot_t); static void mmu_booke_init(mmu_t); static boolean_t mmu_booke_is_modified(mmu_t, vm_page_t); static boolean_t mmu_booke_is_prefaultable(mmu_t, pmap_t, vm_offset_t); static boolean_t mmu_booke_is_referenced(mmu_t, vm_page_t); static int mmu_booke_ts_referenced(mmu_t, vm_page_t); static vm_offset_t mmu_booke_map(mmu_t, vm_offset_t *, vm_paddr_t, vm_paddr_t, int); static int mmu_booke_mincore(mmu_t, pmap_t, vm_offset_t, vm_paddr_t *); static void mmu_booke_object_init_pt(mmu_t, pmap_t, vm_offset_t, vm_object_t, vm_pindex_t, vm_size_t); static boolean_t mmu_booke_page_exists_quick(mmu_t, pmap_t, vm_page_t); static void mmu_booke_page_init(mmu_t, vm_page_t); static int mmu_booke_page_wired_mappings(mmu_t, vm_page_t); static void mmu_booke_pinit(mmu_t, pmap_t); static void mmu_booke_pinit0(mmu_t, pmap_t); static void mmu_booke_protect(mmu_t, pmap_t, vm_offset_t, vm_offset_t, vm_prot_t); static void mmu_booke_qenter(mmu_t, vm_offset_t, vm_page_t *, int); static void mmu_booke_qremove(mmu_t, vm_offset_t, int); static void mmu_booke_release(mmu_t, pmap_t); static void mmu_booke_remove(mmu_t, pmap_t, vm_offset_t, vm_offset_t); static void mmu_booke_remove_all(mmu_t, vm_page_t); static void mmu_booke_remove_write(mmu_t, vm_page_t); static void mmu_booke_unwire(mmu_t, pmap_t, vm_offset_t, vm_offset_t); static void mmu_booke_zero_page(mmu_t, vm_page_t); static void mmu_booke_zero_page_area(mmu_t, vm_page_t, int, int); static void mmu_booke_activate(mmu_t, struct thread *); static void mmu_booke_deactivate(mmu_t, struct thread *); static void mmu_booke_bootstrap(mmu_t, vm_offset_t, vm_offset_t); static void *mmu_booke_mapdev(mmu_t, vm_paddr_t, vm_size_t); static void *mmu_booke_mapdev_attr(mmu_t, vm_paddr_t, vm_size_t, vm_memattr_t); static void mmu_booke_unmapdev(mmu_t, vm_offset_t, vm_size_t); static vm_paddr_t mmu_booke_kextract(mmu_t, vm_offset_t); static void mmu_booke_kenter(mmu_t, vm_offset_t, vm_paddr_t); static void mmu_booke_kenter_attr(mmu_t, vm_offset_t, vm_paddr_t, vm_memattr_t); static void mmu_booke_kremove(mmu_t, vm_offset_t); static boolean_t mmu_booke_dev_direct_mapped(mmu_t, vm_paddr_t, vm_size_t); static void mmu_booke_sync_icache(mmu_t, pmap_t, vm_offset_t, vm_size_t); static void mmu_booke_dumpsys_map(mmu_t, vm_paddr_t pa, size_t, void **); static void mmu_booke_dumpsys_unmap(mmu_t, vm_paddr_t pa, size_t, void *); static void mmu_booke_scan_init(mmu_t); static vm_offset_t mmu_booke_quick_enter_page(mmu_t mmu, vm_page_t m); static void mmu_booke_quick_remove_page(mmu_t mmu, vm_offset_t addr); static int mmu_booke_change_attr(mmu_t mmu, vm_offset_t addr, vm_size_t sz, vm_memattr_t mode); static int mmu_booke_map_user_ptr(mmu_t mmu, pmap_t pm, volatile const void *uaddr, void **kaddr, size_t ulen, size_t *klen); static int mmu_booke_decode_kernel_ptr(mmu_t mmu, vm_offset_t addr, int *is_user, vm_offset_t *decoded_addr); static void mmu_booke_page_array_startup(mmu_t , long); static mmu_method_t mmu_booke_methods[] = { /* pmap dispatcher interface */ MMUMETHOD(mmu_clear_modify, mmu_booke_clear_modify), MMUMETHOD(mmu_copy, mmu_booke_copy), MMUMETHOD(mmu_copy_page, mmu_booke_copy_page), MMUMETHOD(mmu_copy_pages, mmu_booke_copy_pages), MMUMETHOD(mmu_enter, mmu_booke_enter), MMUMETHOD(mmu_enter_object, mmu_booke_enter_object), MMUMETHOD(mmu_enter_quick, mmu_booke_enter_quick), MMUMETHOD(mmu_extract, mmu_booke_extract), MMUMETHOD(mmu_extract_and_hold, mmu_booke_extract_and_hold), MMUMETHOD(mmu_init, mmu_booke_init), MMUMETHOD(mmu_is_modified, mmu_booke_is_modified), MMUMETHOD(mmu_is_prefaultable, mmu_booke_is_prefaultable), MMUMETHOD(mmu_is_referenced, mmu_booke_is_referenced), MMUMETHOD(mmu_ts_referenced, mmu_booke_ts_referenced), MMUMETHOD(mmu_map, mmu_booke_map), MMUMETHOD(mmu_mincore, mmu_booke_mincore), MMUMETHOD(mmu_object_init_pt, mmu_booke_object_init_pt), MMUMETHOD(mmu_page_exists_quick,mmu_booke_page_exists_quick), MMUMETHOD(mmu_page_init, mmu_booke_page_init), MMUMETHOD(mmu_page_wired_mappings, mmu_booke_page_wired_mappings), MMUMETHOD(mmu_pinit, mmu_booke_pinit), MMUMETHOD(mmu_pinit0, mmu_booke_pinit0), MMUMETHOD(mmu_protect, mmu_booke_protect), MMUMETHOD(mmu_qenter, mmu_booke_qenter), MMUMETHOD(mmu_qremove, mmu_booke_qremove), MMUMETHOD(mmu_release, mmu_booke_release), MMUMETHOD(mmu_remove, mmu_booke_remove), MMUMETHOD(mmu_remove_all, mmu_booke_remove_all), MMUMETHOD(mmu_remove_write, mmu_booke_remove_write), MMUMETHOD(mmu_sync_icache, mmu_booke_sync_icache), MMUMETHOD(mmu_unwire, mmu_booke_unwire), MMUMETHOD(mmu_zero_page, mmu_booke_zero_page), MMUMETHOD(mmu_zero_page_area, mmu_booke_zero_page_area), MMUMETHOD(mmu_activate, mmu_booke_activate), MMUMETHOD(mmu_deactivate, mmu_booke_deactivate), MMUMETHOD(mmu_quick_enter_page, mmu_booke_quick_enter_page), MMUMETHOD(mmu_quick_remove_page, mmu_booke_quick_remove_page), MMUMETHOD(mmu_page_array_startup, mmu_booke_page_array_startup), /* Internal interfaces */ MMUMETHOD(mmu_bootstrap, mmu_booke_bootstrap), MMUMETHOD(mmu_dev_direct_mapped,mmu_booke_dev_direct_mapped), MMUMETHOD(mmu_mapdev, mmu_booke_mapdev), MMUMETHOD(mmu_mapdev_attr, mmu_booke_mapdev_attr), MMUMETHOD(mmu_kenter, mmu_booke_kenter), MMUMETHOD(mmu_kenter_attr, mmu_booke_kenter_attr), MMUMETHOD(mmu_kextract, mmu_booke_kextract), MMUMETHOD(mmu_kremove, mmu_booke_kremove), MMUMETHOD(mmu_unmapdev, mmu_booke_unmapdev), MMUMETHOD(mmu_change_attr, mmu_booke_change_attr), MMUMETHOD(mmu_map_user_ptr, mmu_booke_map_user_ptr), MMUMETHOD(mmu_decode_kernel_ptr, mmu_booke_decode_kernel_ptr), /* dumpsys() support */ MMUMETHOD(mmu_dumpsys_map, mmu_booke_dumpsys_map), MMUMETHOD(mmu_dumpsys_unmap, mmu_booke_dumpsys_unmap), MMUMETHOD(mmu_scan_init, mmu_booke_scan_init), { 0, 0 } }; MMU_DEF(booke_mmu, MMU_TYPE_BOOKE, mmu_booke_methods, 0); #ifdef __powerpc64__ #include "pmap_64.c" #else #include "pmap_32.c" #endif static vm_offset_t tlb1_map_base = VM_MAPDEV_BASE; static __inline uint32_t tlb_calc_wimg(vm_paddr_t pa, vm_memattr_t ma) { uint32_t attrib; int i; if (ma != VM_MEMATTR_DEFAULT) { switch (ma) { case VM_MEMATTR_UNCACHEABLE: return (MAS2_I | MAS2_G); case VM_MEMATTR_WRITE_COMBINING: case VM_MEMATTR_WRITE_BACK: case VM_MEMATTR_PREFETCHABLE: return (MAS2_I); case VM_MEMATTR_WRITE_THROUGH: return (MAS2_W | MAS2_M); case VM_MEMATTR_CACHEABLE: return (MAS2_M); } } /* * Assume the page is cache inhibited and access is guarded unless * it's in our available memory array. */ attrib = _TLB_ENTRY_IO; for (i = 0; i < physmem_regions_sz; i++) { if ((pa >= physmem_regions[i].mr_start) && (pa < (physmem_regions[i].mr_start + physmem_regions[i].mr_size))) { attrib = _TLB_ENTRY_MEM; break; } } return (attrib); } static inline void tlb_miss_lock(void) { #ifdef SMP struct pcpu *pc; if (!smp_started) return; STAILQ_FOREACH(pc, &cpuhead, pc_allcpu) { if (pc != pcpup) { CTR3(KTR_PMAP, "%s: tlb miss LOCK of CPU=%d, " "tlb_lock=%p", __func__, pc->pc_cpuid, pc->pc_booke.tlb_lock); KASSERT((pc->pc_cpuid != PCPU_GET(cpuid)), ("tlb_miss_lock: tried to lock self")); tlb_lock(pc->pc_booke.tlb_lock); CTR1(KTR_PMAP, "%s: locked", __func__); } } #endif } static inline void tlb_miss_unlock(void) { #ifdef SMP struct pcpu *pc; if (!smp_started) return; STAILQ_FOREACH(pc, &cpuhead, pc_allcpu) { if (pc != pcpup) { CTR2(KTR_PMAP, "%s: tlb miss UNLOCK of CPU=%d", __func__, pc->pc_cpuid); tlb_unlock(pc->pc_booke.tlb_lock); CTR1(KTR_PMAP, "%s: unlocked", __func__); } } #endif } /* Return number of entries in TLB0. */ static __inline void tlb0_get_tlbconf(void) { uint32_t tlb0_cfg; tlb0_cfg = mfspr(SPR_TLB0CFG); tlb0_entries = tlb0_cfg & TLBCFG_NENTRY_MASK; tlb0_ways = (tlb0_cfg & TLBCFG_ASSOC_MASK) >> TLBCFG_ASSOC_SHIFT; tlb0_entries_per_way = tlb0_entries / tlb0_ways; } /* Return number of entries in TLB1. */ static __inline void tlb1_get_tlbconf(void) { uint32_t tlb1_cfg; tlb1_cfg = mfspr(SPR_TLB1CFG); tlb1_entries = tlb1_cfg & TLBCFG_NENTRY_MASK; } /**************************************************************************/ /* Page table related */ /**************************************************************************/ /* Allocate pv_entry structure. */ pv_entry_t pv_alloc(void) { pv_entry_t pv; pv_entry_count++; if (pv_entry_count > pv_entry_high_water) pagedaemon_wakeup(0); /* XXX powerpc NUMA */ pv = uma_zalloc(pvzone, M_NOWAIT); return (pv); } /* Free pv_entry structure. */ static __inline void pv_free(pv_entry_t pve) { pv_entry_count--; uma_zfree(pvzone, pve); } /* Allocate and initialize pv_entry structure. */ static void pv_insert(pmap_t pmap, vm_offset_t va, vm_page_t m) { pv_entry_t pve; //int su = (pmap == kernel_pmap); //debugf("pv_insert: s (su = %d pmap = 0x%08x va = 0x%08x m = 0x%08x)\n", su, // (u_int32_t)pmap, va, (u_int32_t)m); pve = pv_alloc(); if (pve == NULL) panic("pv_insert: no pv entries!"); pve->pv_pmap = pmap; pve->pv_va = va; /* add to pv_list */ PMAP_LOCK_ASSERT(pmap, MA_OWNED); rw_assert(&pvh_global_lock, RA_WLOCKED); TAILQ_INSERT_TAIL(&m->md.pv_list, pve, pv_link); //debugf("pv_insert: e\n"); } /* Destroy pv entry. */ static void pv_remove(pmap_t pmap, vm_offset_t va, vm_page_t m) { pv_entry_t pve; //int su = (pmap == kernel_pmap); //debugf("pv_remove: s (su = %d pmap = 0x%08x va = 0x%08x)\n", su, (u_int32_t)pmap, va); PMAP_LOCK_ASSERT(pmap, MA_OWNED); rw_assert(&pvh_global_lock, RA_WLOCKED); /* find pv entry */ TAILQ_FOREACH(pve, &m->md.pv_list, pv_link) { if ((pmap == pve->pv_pmap) && (va == pve->pv_va)) { /* remove from pv_list */ TAILQ_REMOVE(&m->md.pv_list, pve, pv_link); if (TAILQ_EMPTY(&m->md.pv_list)) vm_page_aflag_clear(m, PGA_WRITEABLE); /* free pv entry struct */ pv_free(pve); break; } } //debugf("pv_remove: e\n"); } /**************************************************************************/ /* PMAP related */ /**************************************************************************/ /* * This is called during booke_init, before the system is really initialized. */ static void mmu_booke_bootstrap(mmu_t mmu, vm_offset_t start, vm_offset_t kernelend) { vm_paddr_t phys_kernelend; struct mem_region *mp, *mp1; int cnt, i, j; vm_paddr_t s, e, sz; vm_paddr_t physsz, hwphyssz; u_int phys_avail_count; vm_size_t kstack0_sz; vm_paddr_t kstack0_phys; vm_offset_t kstack0; void *dpcpu; debugf("mmu_booke_bootstrap: entered\n"); /* Set interesting system properties */ #ifdef __powerpc64__ hw_direct_map = 1; #else hw_direct_map = 0; #endif #if defined(COMPAT_FREEBSD32) || !defined(__powerpc64__) elf32_nxstack = 1; #endif /* Initialize invalidation mutex */ mtx_init(&tlbivax_mutex, "tlbivax", NULL, MTX_SPIN); /* Read TLB0 size and associativity. */ tlb0_get_tlbconf(); /* * Align kernel start and end address (kernel image). * Note that kernel end does not necessarily relate to kernsize. * kernsize is the size of the kernel that is actually mapped. */ data_start = round_page(kernelend); data_end = data_start; /* Allocate the dynamic per-cpu area. */ dpcpu = (void *)data_end; data_end += DPCPU_SIZE; /* Allocate space for the message buffer. */ msgbufp = (struct msgbuf *)data_end; data_end += msgbufsize; debugf(" msgbufp at 0x%"PRI0ptrX" end = 0x%"PRI0ptrX"\n", (uintptr_t)msgbufp, data_end); data_end = round_page(data_end); data_end = round_page(mmu_booke_alloc_kernel_pgtables(data_end)); /* Retrieve phys/avail mem regions */ mem_regions(&physmem_regions, &physmem_regions_sz, &availmem_regions, &availmem_regions_sz); if (PHYS_AVAIL_ENTRIES < availmem_regions_sz) panic("mmu_booke_bootstrap: phys_avail too small"); data_end = round_page(data_end); vm_page_array = (vm_page_t)data_end; /* * Get a rough idea (upper bound) on the size of the page array. The * vm_page_array will not handle any more pages than we have in the * avail_regions array, and most likely much less. */ sz = 0; for (mp = availmem_regions; mp->mr_size; mp++) { sz += mp->mr_size; } sz = (round_page(sz) / (PAGE_SIZE + sizeof(struct vm_page))); data_end += round_page(sz * sizeof(struct vm_page)); /* Pre-round up to 1MB. This wastes some space, but saves TLB entries */ data_end = roundup2(data_end, 1 << 20); debugf(" data_end: 0x%"PRI0ptrX"\n", data_end); debugf(" kernstart: %#zx\n", kernstart); debugf(" kernsize: %#zx\n", kernsize); if (data_end - kernstart > kernsize) { kernsize += tlb1_mapin_region(kernstart + kernsize, kernload + kernsize, (data_end - kernstart) - kernsize, _TLB_ENTRY_MEM); } data_end = kernstart + kernsize; debugf(" updated data_end: 0x%"PRI0ptrX"\n", data_end); /* * Clear the structures - note we can only do it safely after the * possible additional TLB1 translations are in place (above) so that * all range up to the currently calculated 'data_end' is covered. */ bzero((void *)data_start, data_end - data_start); dpcpu_init(dpcpu, 0); /*******************************************************/ /* Set the start and end of kva. */ /*******************************************************/ virtual_avail = round_page(data_end); virtual_end = VM_MAX_KERNEL_ADDRESS; #ifndef __powerpc64__ /* Allocate KVA space for page zero/copy operations. */ zero_page_va = virtual_avail; virtual_avail += PAGE_SIZE; copy_page_src_va = virtual_avail; virtual_avail += PAGE_SIZE; copy_page_dst_va = virtual_avail; virtual_avail += PAGE_SIZE; debugf("zero_page_va = 0x%"PRI0ptrX"\n", zero_page_va); debugf("copy_page_src_va = 0x%"PRI0ptrX"\n", copy_page_src_va); debugf("copy_page_dst_va = 0x%"PRI0ptrX"\n", copy_page_dst_va); /* Initialize page zero/copy mutexes. */ mtx_init(&zero_page_mutex, "mmu_booke_zero_page", NULL, MTX_DEF); mtx_init(©_page_mutex, "mmu_booke_copy_page", NULL, MTX_DEF); /* Allocate KVA space for ptbl bufs. */ ptbl_buf_pool_vabase = virtual_avail; virtual_avail += PTBL_BUFS * PTBL_PAGES * PAGE_SIZE; debugf("ptbl_buf_pool_vabase = 0x%"PRI0ptrX" end = 0x%"PRI0ptrX"\n", ptbl_buf_pool_vabase, virtual_avail); #endif /* Calculate corresponding physical addresses for the kernel region. */ phys_kernelend = kernload + kernsize; debugf("kernel image and allocated data:\n"); debugf(" kernload = 0x%09jx\n", (uintmax_t)kernload); debugf(" kernstart = 0x%"PRI0ptrX"\n", kernstart); debugf(" kernsize = 0x%"PRI0ptrX"\n", kernsize); /* * Remove kernel physical address range from avail regions list. Page * align all regions. Non-page aligned memory isn't very interesting * to us. Also, sort the entries for ascending addresses. */ sz = 0; cnt = availmem_regions_sz; debugf("processing avail regions:\n"); for (mp = availmem_regions; mp->mr_size; mp++) { s = mp->mr_start; e = mp->mr_start + mp->mr_size; debugf(" %09jx-%09jx -> ", (uintmax_t)s, (uintmax_t)e); /* Check whether this region holds all of the kernel. */ if (s < kernload && e > phys_kernelend) { availmem_regions[cnt].mr_start = phys_kernelend; availmem_regions[cnt++].mr_size = e - phys_kernelend; e = kernload; } /* Look whether this regions starts within the kernel. */ if (s >= kernload && s < phys_kernelend) { if (e <= phys_kernelend) goto empty; s = phys_kernelend; } /* Now look whether this region ends within the kernel. */ if (e > kernload && e <= phys_kernelend) { if (s >= kernload) goto empty; e = kernload; } /* Now page align the start and size of the region. */ s = round_page(s); e = trunc_page(e); if (e < s) e = s; sz = e - s; debugf("%09jx-%09jx = %jx\n", (uintmax_t)s, (uintmax_t)e, (uintmax_t)sz); /* Check whether some memory is left here. */ if (sz == 0) { empty: memmove(mp, mp + 1, (cnt - (mp - availmem_regions)) * sizeof(*mp)); cnt--; mp--; continue; } /* Do an insertion sort. */ for (mp1 = availmem_regions; mp1 < mp; mp1++) if (s < mp1->mr_start) break; if (mp1 < mp) { memmove(mp1 + 1, mp1, (char *)mp - (char *)mp1); mp1->mr_start = s; mp1->mr_size = sz; } else { mp->mr_start = s; mp->mr_size = sz; } } availmem_regions_sz = cnt; /*******************************************************/ /* Steal physical memory for kernel stack from the end */ /* of the first avail region */ /*******************************************************/ kstack0_sz = kstack_pages * PAGE_SIZE; kstack0_phys = availmem_regions[0].mr_start + availmem_regions[0].mr_size; kstack0_phys -= kstack0_sz; availmem_regions[0].mr_size -= kstack0_sz; /*******************************************************/ /* Fill in phys_avail table, based on availmem_regions */ /*******************************************************/ phys_avail_count = 0; physsz = 0; hwphyssz = 0; TUNABLE_ULONG_FETCH("hw.physmem", (u_long *) &hwphyssz); debugf("fill in phys_avail:\n"); for (i = 0, j = 0; i < availmem_regions_sz; i++, j += 2) { debugf(" region: 0x%jx - 0x%jx (0x%jx)\n", (uintmax_t)availmem_regions[i].mr_start, (uintmax_t)availmem_regions[i].mr_start + availmem_regions[i].mr_size, (uintmax_t)availmem_regions[i].mr_size); if (hwphyssz != 0 && (physsz + availmem_regions[i].mr_size) >= hwphyssz) { debugf(" hw.physmem adjust\n"); if (physsz < hwphyssz) { phys_avail[j] = availmem_regions[i].mr_start; phys_avail[j + 1] = availmem_regions[i].mr_start + hwphyssz - physsz; physsz = hwphyssz; phys_avail_count++; dump_avail[j] = phys_avail[j]; dump_avail[j + 1] = phys_avail[j + 1]; } break; } phys_avail[j] = availmem_regions[i].mr_start; phys_avail[j + 1] = availmem_regions[i].mr_start + availmem_regions[i].mr_size; phys_avail_count++; physsz += availmem_regions[i].mr_size; dump_avail[j] = phys_avail[j]; dump_avail[j + 1] = phys_avail[j + 1]; } physmem = btoc(physsz); /* Calculate the last available physical address. */ for (i = 0; phys_avail[i + 2] != 0; i += 2) ; Maxmem = powerpc_btop(phys_avail[i + 1]); debugf("Maxmem = 0x%08lx\n", Maxmem); debugf("phys_avail_count = %d\n", phys_avail_count); debugf("physsz = 0x%09jx physmem = %jd (0x%09jx)\n", (uintmax_t)physsz, (uintmax_t)physmem, (uintmax_t)physmem); #ifdef __powerpc64__ /* * Map the physical memory contiguously in TLB1. * Round so it fits into a single mapping. */ tlb1_mapin_region(DMAP_BASE_ADDRESS, 0, phys_avail[i + 1], _TLB_ENTRY_MEM); #endif /*******************************************************/ /* Initialize (statically allocated) kernel pmap. */ /*******************************************************/ PMAP_LOCK_INIT(kernel_pmap); debugf("kernel_pmap = 0x%"PRI0ptrX"\n", (uintptr_t)kernel_pmap); kernel_pte_alloc(virtual_avail, kernstart); for (i = 0; i < MAXCPU; i++) { kernel_pmap->pm_tid[i] = TID_KERNEL; /* Initialize each CPU's tidbusy entry 0 with kernel_pmap */ tidbusy[i][TID_KERNEL] = kernel_pmap; } /* Mark kernel_pmap active on all CPUs */ CPU_FILL(&kernel_pmap->pm_active); /* * Initialize the global pv list lock. */ rw_init(&pvh_global_lock, "pmap pv global"); /*******************************************************/ /* Final setup */ /*******************************************************/ /* Enter kstack0 into kernel map, provide guard page */ kstack0 = virtual_avail + KSTACK_GUARD_PAGES * PAGE_SIZE; thread0.td_kstack = kstack0; thread0.td_kstack_pages = kstack_pages; debugf("kstack_sz = 0x%08jx\n", (uintmax_t)kstack0_sz); debugf("kstack0_phys at 0x%09jx - 0x%09jx\n", (uintmax_t)kstack0_phys, (uintmax_t)kstack0_phys + kstack0_sz); debugf("kstack0 at 0x%"PRI0ptrX" - 0x%"PRI0ptrX"\n", kstack0, kstack0 + kstack0_sz); virtual_avail += KSTACK_GUARD_PAGES * PAGE_SIZE + kstack0_sz; for (i = 0; i < kstack_pages; i++) { mmu_booke_kenter(mmu, kstack0, kstack0_phys); kstack0 += PAGE_SIZE; kstack0_phys += PAGE_SIZE; } pmap_bootstrapped = 1; debugf("virtual_avail = %"PRI0ptrX"\n", virtual_avail); debugf("virtual_end = %"PRI0ptrX"\n", virtual_end); debugf("mmu_booke_bootstrap: exit\n"); } #ifdef SMP void tlb1_ap_prep(void) { tlb_entry_t *e, tmp; unsigned int i; /* Prepare TLB1 image for AP processors */ e = __boot_tlb1; for (i = 0; i < TLB1_ENTRIES; i++) { tlb1_read_entry(&tmp, i); if ((tmp.mas1 & MAS1_VALID) && (tmp.mas2 & _TLB_ENTRY_SHARED)) memcpy(e++, &tmp, sizeof(tmp)); } } void pmap_bootstrap_ap(volatile uint32_t *trcp __unused) { int i; /* * Finish TLB1 configuration: the BSP already set up its TLB1 and we * have the snapshot of its contents in the s/w __boot_tlb1[] table * created by tlb1_ap_prep(), so use these values directly to * (re)program AP's TLB1 hardware. * * Start at index 1 because index 0 has the kernel map. */ for (i = 1; i < TLB1_ENTRIES; i++) { if (__boot_tlb1[i].mas1 & MAS1_VALID) tlb1_write_entry(&__boot_tlb1[i], i); } set_mas4_defaults(); } #endif static void booke_pmap_init_qpages(void) { struct pcpu *pc; int i; CPU_FOREACH(i) { pc = pcpu_find(i); pc->pc_qmap_addr = kva_alloc(PAGE_SIZE); if (pc->pc_qmap_addr == 0) panic("pmap_init_qpages: unable to allocate KVA"); } } SYSINIT(qpages_init, SI_SUB_CPU, SI_ORDER_ANY, booke_pmap_init_qpages, NULL); /* * Get the physical page address for the given pmap/virtual address. */ static vm_paddr_t mmu_booke_extract(mmu_t mmu, pmap_t pmap, vm_offset_t va) { vm_paddr_t pa; PMAP_LOCK(pmap); pa = pte_vatopa(mmu, pmap, va); PMAP_UNLOCK(pmap); return (pa); } /* * Extract the physical page address associated with the given * kernel virtual address. */ static vm_paddr_t mmu_booke_kextract(mmu_t mmu, vm_offset_t va) { tlb_entry_t e; vm_paddr_t p = 0; int i; #ifdef __powerpc64__ if (va >= DMAP_BASE_ADDRESS && va <= DMAP_MAX_ADDRESS) return (DMAP_TO_PHYS(va)); #endif if (va >= VM_MIN_KERNEL_ADDRESS && va <= VM_MAX_KERNEL_ADDRESS) p = pte_vatopa(mmu, kernel_pmap, va); if (p == 0) { /* Check TLB1 mappings */ for (i = 0; i < TLB1_ENTRIES; i++) { tlb1_read_entry(&e, i); if (!(e.mas1 & MAS1_VALID)) continue; if (va >= e.virt && va < e.virt + e.size) return (e.phys + (va - e.virt)); } } return (p); } /* * Initialize the pmap module. * Called by vm_init, to initialize any structures that the pmap * system needs to map virtual memory. */ static void mmu_booke_init(mmu_t mmu) { int shpgperproc = PMAP_SHPGPERPROC; /* * Initialize the address space (zone) for the pv entries. Set a * high water mark so that the system can recover from excessive * numbers of pv entries. */ pvzone = uma_zcreate("PV ENTRY", sizeof(struct pv_entry), NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, UMA_ZONE_VM | UMA_ZONE_NOFREE); TUNABLE_INT_FETCH("vm.pmap.shpgperproc", &shpgperproc); pv_entry_max = shpgperproc * maxproc + vm_cnt.v_page_count; TUNABLE_INT_FETCH("vm.pmap.pv_entries", &pv_entry_max); pv_entry_high_water = 9 * (pv_entry_max / 10); uma_zone_reserve_kva(pvzone, pv_entry_max); /* Pre-fill pvzone with initial number of pv entries. */ uma_prealloc(pvzone, PV_ENTRY_ZONE_MIN); /* Create a UMA zone for page table roots. */ ptbl_root_zone = uma_zcreate("pmap root", PMAP_ROOT_SIZE, NULL, NULL, NULL, NULL, UMA_ALIGN_CACHE, UMA_ZONE_VM); /* Initialize ptbl allocation. */ ptbl_init(); } /* * Map a list of wired pages into kernel virtual address space. This is * intended for temporary mappings which do not need page modification or * references recorded. Existing mappings in the region are overwritten. */ static void mmu_booke_qenter(mmu_t mmu, vm_offset_t sva, vm_page_t *m, int count) { vm_offset_t va; va = sva; while (count-- > 0) { mmu_booke_kenter(mmu, va, VM_PAGE_TO_PHYS(*m)); va += PAGE_SIZE; m++; } } /* * Remove page mappings from kernel virtual address space. Intended for * temporary mappings entered by mmu_booke_qenter. */ static void mmu_booke_qremove(mmu_t mmu, vm_offset_t sva, int count) { vm_offset_t va; va = sva; while (count-- > 0) { mmu_booke_kremove(mmu, va); va += PAGE_SIZE; } } /* * Map a wired page into kernel virtual address space. */ static void mmu_booke_kenter(mmu_t mmu, vm_offset_t va, vm_paddr_t pa) { mmu_booke_kenter_attr(mmu, va, pa, VM_MEMATTR_DEFAULT); } static void mmu_booke_kenter_attr(mmu_t mmu, vm_offset_t va, vm_paddr_t pa, vm_memattr_t ma) { uint32_t flags; pte_t *pte; KASSERT(((va >= VM_MIN_KERNEL_ADDRESS) && (va <= VM_MAX_KERNEL_ADDRESS)), ("mmu_booke_kenter: invalid va")); flags = PTE_SR | PTE_SW | PTE_SX | PTE_WIRED | PTE_VALID; flags |= tlb_calc_wimg(pa, ma) << PTE_MAS2_SHIFT; flags |= PTE_PS_4KB; pte = pte_find(mmu, kernel_pmap, va); KASSERT((pte != NULL), ("mmu_booke_kenter: invalid va. NULL PTE")); mtx_lock_spin(&tlbivax_mutex); tlb_miss_lock(); if (PTE_ISVALID(pte)) { CTR1(KTR_PMAP, "%s: replacing entry!", __func__); /* Flush entry from TLB0 */ tlb0_flush_entry(va); } *pte = PTE_RPN_FROM_PA(pa) | flags; //debugf("mmu_booke_kenter: pdir_idx = %d ptbl_idx = %d va=0x%08x " // "pa=0x%08x rpn=0x%08x flags=0x%08x\n", // pdir_idx, ptbl_idx, va, pa, pte->rpn, pte->flags); /* Flush the real memory from the instruction cache. */ if ((flags & (PTE_I | PTE_G)) == 0) __syncicache((void *)va, PAGE_SIZE); tlb_miss_unlock(); mtx_unlock_spin(&tlbivax_mutex); } /* * Remove a page from kernel page table. */ static void mmu_booke_kremove(mmu_t mmu, vm_offset_t va) { pte_t *pte; CTR2(KTR_PMAP,"%s: s (va = 0x%"PRI0ptrX")\n", __func__, va); KASSERT(((va >= VM_MIN_KERNEL_ADDRESS) && (va <= VM_MAX_KERNEL_ADDRESS)), ("mmu_booke_kremove: invalid va")); pte = pte_find(mmu, kernel_pmap, va); if (!PTE_ISVALID(pte)) { CTR1(KTR_PMAP, "%s: invalid pte", __func__); return; } mtx_lock_spin(&tlbivax_mutex); tlb_miss_lock(); /* Invalidate entry in TLB0, update PTE. */ tlb0_flush_entry(va); *pte = 0; tlb_miss_unlock(); mtx_unlock_spin(&tlbivax_mutex); } /* * Provide a kernel pointer corresponding to a given userland pointer. * The returned pointer is valid until the next time this function is * called in this thread. This is used internally in copyin/copyout. */ int mmu_booke_map_user_ptr(mmu_t mmu, pmap_t pm, volatile const void *uaddr, void **kaddr, size_t ulen, size_t *klen) { if (trunc_page((uintptr_t)uaddr + ulen) > VM_MAXUSER_ADDRESS) return (EFAULT); *kaddr = (void *)(uintptr_t)uaddr; if (klen) *klen = ulen; return (0); } /* * Figure out where a given kernel pointer (usually in a fault) points * to from the VM's perspective, potentially remapping into userland's * address space. */ static int mmu_booke_decode_kernel_ptr(mmu_t mmu, vm_offset_t addr, int *is_user, vm_offset_t *decoded_addr) { if (trunc_page(addr) <= VM_MAXUSER_ADDRESS) *is_user = 1; else *is_user = 0; *decoded_addr = addr; return (0); } /* * Initialize pmap associated with process 0. */ static void mmu_booke_pinit0(mmu_t mmu, pmap_t pmap) { PMAP_LOCK_INIT(pmap); mmu_booke_pinit(mmu, pmap); PCPU_SET(curpmap, pmap); } /* * Insert the given physical page at the specified virtual address in the * target physical map with the protection requested. If specified the page * will be wired down. */ static int mmu_booke_enter(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_page_t m, vm_prot_t prot, u_int flags, int8_t psind) { int error; rw_wlock(&pvh_global_lock); PMAP_LOCK(pmap); error = mmu_booke_enter_locked(mmu, pmap, va, m, prot, flags, psind); PMAP_UNLOCK(pmap); rw_wunlock(&pvh_global_lock); return (error); } static int mmu_booke_enter_locked(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_page_t m, vm_prot_t prot, u_int pmap_flags, int8_t psind __unused) { pte_t *pte; vm_paddr_t pa; pte_t flags; int error, su, sync; pa = VM_PAGE_TO_PHYS(m); su = (pmap == kernel_pmap); sync = 0; //debugf("mmu_booke_enter_locked: s (pmap=0x%08x su=%d tid=%d m=0x%08x va=0x%08x " // "pa=0x%08x prot=0x%08x flags=%#x)\n", // (u_int32_t)pmap, su, pmap->pm_tid, // (u_int32_t)m, va, pa, prot, flags); if (su) { KASSERT(((va >= virtual_avail) && (va <= VM_MAX_KERNEL_ADDRESS)), ("mmu_booke_enter_locked: kernel pmap, non kernel va")); } else { KASSERT((va <= VM_MAXUSER_ADDRESS), ("mmu_booke_enter_locked: user pmap, non user va")); } if ((m->oflags & VPO_UNMANAGED) == 0) { if ((pmap_flags & PMAP_ENTER_QUICK_LOCKED) == 0) VM_PAGE_OBJECT_BUSY_ASSERT(m); else VM_OBJECT_ASSERT_LOCKED(m->object); } PMAP_LOCK_ASSERT(pmap, MA_OWNED); /* * If there is an existing mapping, and the physical address has not * changed, must be protection or wiring change. */ if (((pte = pte_find(mmu, pmap, va)) != NULL) && (PTE_ISVALID(pte)) && (PTE_PA(pte) == pa)) { /* * Before actually updating pte->flags we calculate and * prepare its new value in a helper var. */ flags = *pte; flags &= ~(PTE_UW | PTE_UX | PTE_SW | PTE_SX | PTE_MODIFIED); /* Wiring change, just update stats. */ if ((pmap_flags & PMAP_ENTER_WIRED) != 0) { if (!PTE_ISWIRED(pte)) { flags |= PTE_WIRED; pmap->pm_stats.wired_count++; } } else { if (PTE_ISWIRED(pte)) { flags &= ~PTE_WIRED; pmap->pm_stats.wired_count--; } } if (prot & VM_PROT_WRITE) { /* Add write permissions. */ flags |= PTE_SW; if (!su) flags |= PTE_UW; if ((flags & PTE_MANAGED) != 0) vm_page_aflag_set(m, PGA_WRITEABLE); } else { /* Handle modified pages, sense modify status. */ /* * The PTE_MODIFIED flag could be set by underlying * TLB misses since we last read it (above), possibly * other CPUs could update it so we check in the PTE * directly rather than rely on that saved local flags * copy. */ if (PTE_ISMODIFIED(pte)) vm_page_dirty(m); } if (prot & VM_PROT_EXECUTE) { flags |= PTE_SX; if (!su) flags |= PTE_UX; /* * Check existing flags for execute permissions: if we * are turning execute permissions on, icache should * be flushed. */ if ((*pte & (PTE_UX | PTE_SX)) == 0) sync++; } flags &= ~PTE_REFERENCED; /* * The new flags value is all calculated -- only now actually * update the PTE. */ mtx_lock_spin(&tlbivax_mutex); tlb_miss_lock(); tlb0_flush_entry(va); *pte &= ~PTE_FLAGS_MASK; *pte |= flags; tlb_miss_unlock(); mtx_unlock_spin(&tlbivax_mutex); } else { /* * If there is an existing mapping, but it's for a different * physical address, pte_enter() will delete the old mapping. */ //if ((pte != NULL) && PTE_ISVALID(pte)) // debugf("mmu_booke_enter_locked: replace\n"); //else // debugf("mmu_booke_enter_locked: new\n"); /* Now set up the flags and install the new mapping. */ flags = (PTE_SR | PTE_VALID); flags |= PTE_M; if (!su) flags |= PTE_UR; if (prot & VM_PROT_WRITE) { flags |= PTE_SW; if (!su) flags |= PTE_UW; if ((m->oflags & VPO_UNMANAGED) == 0) vm_page_aflag_set(m, PGA_WRITEABLE); } if (prot & VM_PROT_EXECUTE) { flags |= PTE_SX; if (!su) flags |= PTE_UX; } /* If its wired update stats. */ if ((pmap_flags & PMAP_ENTER_WIRED) != 0) flags |= PTE_WIRED; error = pte_enter(mmu, pmap, m, va, flags, (pmap_flags & PMAP_ENTER_NOSLEEP) != 0); if (error != 0) return (KERN_RESOURCE_SHORTAGE); if ((flags & PMAP_ENTER_WIRED) != 0) pmap->pm_stats.wired_count++; /* Flush the real memory from the instruction cache. */ if (prot & VM_PROT_EXECUTE) sync++; } if (sync && (su || pmap == PCPU_GET(curpmap))) { __syncicache((void *)va, PAGE_SIZE); sync = 0; } return (KERN_SUCCESS); } /* * Maps a sequence of resident pages belonging to the same object. * The sequence begins with the given page m_start. This page is * mapped at the given virtual address start. Each subsequent page is * mapped at a virtual address that is offset from start by the same * amount as the page is offset from m_start within the object. The * last page in the sequence is the page with the largest offset from * m_start that can be mapped at a virtual address less than the given * virtual address end. Not every virtual page between start and end * is mapped; only those for which a resident page exists with the * corresponding offset from m_start are mapped. */ static void mmu_booke_enter_object(mmu_t mmu, pmap_t pmap, vm_offset_t start, vm_offset_t end, vm_page_t m_start, vm_prot_t prot) { vm_page_t m; vm_pindex_t diff, psize; VM_OBJECT_ASSERT_LOCKED(m_start->object); psize = atop(end - start); m = m_start; rw_wlock(&pvh_global_lock); PMAP_LOCK(pmap); while (m != NULL && (diff = m->pindex - m_start->pindex) < psize) { mmu_booke_enter_locked(mmu, pmap, start + ptoa(diff), m, prot & (VM_PROT_READ | VM_PROT_EXECUTE), PMAP_ENTER_NOSLEEP | PMAP_ENTER_QUICK_LOCKED, 0); m = TAILQ_NEXT(m, listq); } PMAP_UNLOCK(pmap); rw_wunlock(&pvh_global_lock); } static void mmu_booke_enter_quick(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_page_t m, vm_prot_t prot) { rw_wlock(&pvh_global_lock); PMAP_LOCK(pmap); mmu_booke_enter_locked(mmu, pmap, va, m, prot & (VM_PROT_READ | VM_PROT_EXECUTE), PMAP_ENTER_NOSLEEP | PMAP_ENTER_QUICK_LOCKED, 0); PMAP_UNLOCK(pmap); rw_wunlock(&pvh_global_lock); } /* * Remove the given range of addresses from the specified map. * * It is assumed that the start and end are properly rounded to the page size. */ static void mmu_booke_remove(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_offset_t endva) { pte_t *pte; uint8_t hold_flag; int su = (pmap == kernel_pmap); //debugf("mmu_booke_remove: s (su = %d pmap=0x%08x tid=%d va=0x%08x endva=0x%08x)\n", // su, (u_int32_t)pmap, pmap->pm_tid, va, endva); if (su) { KASSERT(((va >= virtual_avail) && (va <= VM_MAX_KERNEL_ADDRESS)), ("mmu_booke_remove: kernel pmap, non kernel va")); } else { KASSERT((va <= VM_MAXUSER_ADDRESS), ("mmu_booke_remove: user pmap, non user va")); } if (PMAP_REMOVE_DONE(pmap)) { //debugf("mmu_booke_remove: e (empty)\n"); return; } hold_flag = PTBL_HOLD_FLAG(pmap); //debugf("mmu_booke_remove: hold_flag = %d\n", hold_flag); rw_wlock(&pvh_global_lock); PMAP_LOCK(pmap); for (; va < endva; va += PAGE_SIZE) { - pte = pte_find(mmu, pmap, va); - if ((pte != NULL) && PTE_ISVALID(pte)) - pte_remove(mmu, pmap, va, hold_flag); + pte = pte_find_next(mmu, pmap, &va); + if ((pte == NULL) || !PTE_ISVALID(pte)) + break; + if (va >= endva) + break; + pte_remove(mmu, pmap, va, hold_flag); } PMAP_UNLOCK(pmap); rw_wunlock(&pvh_global_lock); //debugf("mmu_booke_remove: e\n"); } /* * Remove physical page from all pmaps in which it resides. */ static void mmu_booke_remove_all(mmu_t mmu, vm_page_t m) { pv_entry_t pv, pvn; uint8_t hold_flag; rw_wlock(&pvh_global_lock); TAILQ_FOREACH_SAFE(pv, &m->md.pv_list, pv_link, pvn) { PMAP_LOCK(pv->pv_pmap); hold_flag = PTBL_HOLD_FLAG(pv->pv_pmap); pte_remove(mmu, pv->pv_pmap, pv->pv_va, hold_flag); PMAP_UNLOCK(pv->pv_pmap); } vm_page_aflag_clear(m, PGA_WRITEABLE); rw_wunlock(&pvh_global_lock); } /* * Map a range of physical addresses into kernel virtual address space. */ static vm_offset_t mmu_booke_map(mmu_t mmu, vm_offset_t *virt, vm_paddr_t pa_start, vm_paddr_t pa_end, int prot) { vm_offset_t sva = *virt; vm_offset_t va = sva; #ifdef __powerpc64__ /* XXX: Handle memory not starting at 0x0. */ if (pa_end < ctob(Maxmem)) return (PHYS_TO_DMAP(pa_start)); #endif while (pa_start < pa_end) { mmu_booke_kenter(mmu, va, pa_start); va += PAGE_SIZE; pa_start += PAGE_SIZE; } *virt = va; return (sva); } /* * The pmap must be activated before it's address space can be accessed in any * way. */ static void mmu_booke_activate(mmu_t mmu, struct thread *td) { pmap_t pmap; u_int cpuid; pmap = &td->td_proc->p_vmspace->vm_pmap; CTR5(KTR_PMAP, "%s: s (td = %p, proc = '%s', id = %d, pmap = 0x%"PRI0ptrX")", __func__, td, td->td_proc->p_comm, td->td_proc->p_pid, pmap); KASSERT((pmap != kernel_pmap), ("mmu_booke_activate: kernel_pmap!")); sched_pin(); cpuid = PCPU_GET(cpuid); CPU_SET_ATOMIC(cpuid, &pmap->pm_active); PCPU_SET(curpmap, pmap); if (pmap->pm_tid[cpuid] == TID_NONE) tid_alloc(pmap); /* Load PID0 register with pmap tid value. */ mtspr(SPR_PID0, pmap->pm_tid[cpuid]); __asm __volatile("isync"); mtspr(SPR_DBCR0, td->td_pcb->pcb_cpu.booke.dbcr0); sched_unpin(); CTR3(KTR_PMAP, "%s: e (tid = %d for '%s')", __func__, pmap->pm_tid[PCPU_GET(cpuid)], td->td_proc->p_comm); } /* * Deactivate the specified process's address space. */ static void mmu_booke_deactivate(mmu_t mmu, struct thread *td) { pmap_t pmap; pmap = &td->td_proc->p_vmspace->vm_pmap; CTR5(KTR_PMAP, "%s: td=%p, proc = '%s', id = %d, pmap = 0x%"PRI0ptrX, __func__, td, td->td_proc->p_comm, td->td_proc->p_pid, pmap); td->td_pcb->pcb_cpu.booke.dbcr0 = mfspr(SPR_DBCR0); CPU_CLR_ATOMIC(PCPU_GET(cpuid), &pmap->pm_active); PCPU_SET(curpmap, NULL); } /* * Copy the range specified by src_addr/len * from the source map to the range dst_addr/len * in the destination map. * * This routine is only advisory and need not do anything. */ static void mmu_booke_copy(mmu_t mmu, pmap_t dst_pmap, pmap_t src_pmap, vm_offset_t dst_addr, vm_size_t len, vm_offset_t src_addr) { } /* * Set the physical protection on the specified range of this map as requested. */ static void mmu_booke_protect(mmu_t mmu, pmap_t pmap, vm_offset_t sva, vm_offset_t eva, vm_prot_t prot) { vm_offset_t va; vm_page_t m; pte_t *pte; if ((prot & VM_PROT_READ) == VM_PROT_NONE) { mmu_booke_remove(mmu, pmap, sva, eva); return; } if (prot & VM_PROT_WRITE) return; PMAP_LOCK(pmap); for (va = sva; va < eva; va += PAGE_SIZE) { if ((pte = pte_find(mmu, pmap, va)) != NULL) { if (PTE_ISVALID(pte)) { m = PHYS_TO_VM_PAGE(PTE_PA(pte)); mtx_lock_spin(&tlbivax_mutex); tlb_miss_lock(); /* Handle modified pages. */ if (PTE_ISMODIFIED(pte) && PTE_ISMANAGED(pte)) vm_page_dirty(m); tlb0_flush_entry(va); *pte &= ~(PTE_UW | PTE_SW | PTE_MODIFIED); tlb_miss_unlock(); mtx_unlock_spin(&tlbivax_mutex); } } } PMAP_UNLOCK(pmap); } /* * Clear the write and modified bits in each of the given page's mappings. */ static void mmu_booke_remove_write(mmu_t mmu, vm_page_t m) { pv_entry_t pv; pte_t *pte; KASSERT((m->oflags & VPO_UNMANAGED) == 0, ("mmu_booke_remove_write: page %p is not managed", m)); vm_page_assert_busied(m); if (!pmap_page_is_write_mapped(m)) return; rw_wlock(&pvh_global_lock); TAILQ_FOREACH(pv, &m->md.pv_list, pv_link) { PMAP_LOCK(pv->pv_pmap); if ((pte = pte_find(mmu, pv->pv_pmap, pv->pv_va)) != NULL) { if (PTE_ISVALID(pte)) { m = PHYS_TO_VM_PAGE(PTE_PA(pte)); mtx_lock_spin(&tlbivax_mutex); tlb_miss_lock(); /* Handle modified pages. */ if (PTE_ISMODIFIED(pte)) vm_page_dirty(m); /* Flush mapping from TLB0. */ *pte &= ~(PTE_UW | PTE_SW | PTE_MODIFIED); tlb_miss_unlock(); mtx_unlock_spin(&tlbivax_mutex); } } PMAP_UNLOCK(pv->pv_pmap); } vm_page_aflag_clear(m, PGA_WRITEABLE); rw_wunlock(&pvh_global_lock); } /* * Atomically extract and hold the physical page with the given * pmap and virtual address pair if that mapping permits the given * protection. */ static vm_page_t mmu_booke_extract_and_hold(mmu_t mmu, pmap_t pmap, vm_offset_t va, vm_prot_t prot) { pte_t *pte; vm_page_t m; uint32_t pte_wbit; m = NULL; PMAP_LOCK(pmap); pte = pte_find(mmu, pmap, va); if ((pte != NULL) && PTE_ISVALID(pte)) { if (pmap == kernel_pmap) pte_wbit = PTE_SW; else pte_wbit = PTE_UW; if ((*pte & pte_wbit) != 0 || (prot & VM_PROT_WRITE) == 0) { m = PHYS_TO_VM_PAGE(PTE_PA(pte)); if (!vm_page_wire_mapped(m)) m = NULL; } } PMAP_UNLOCK(pmap); return (m); } /* * Initialize a vm_page's machine-dependent fields. */ static void mmu_booke_page_init(mmu_t mmu, vm_page_t m) { m->md.pv_tracked = 0; TAILQ_INIT(&m->md.pv_list); } /* * Return whether or not the specified physical page was modified * in any of physical maps. */ static boolean_t mmu_booke_is_modified(mmu_t mmu, vm_page_t m) { pte_t *pte; pv_entry_t pv; boolean_t rv; KASSERT((m->oflags & VPO_UNMANAGED) == 0, ("mmu_booke_is_modified: page %p is not managed", m)); rv = FALSE; /* * If the page is not busied then this check is racy. */ if (!pmap_page_is_write_mapped(m)) return (FALSE); rw_wlock(&pvh_global_lock); TAILQ_FOREACH(pv, &m->md.pv_list, pv_link) { PMAP_LOCK(pv->pv_pmap); if ((pte = pte_find(mmu, pv->pv_pmap, pv->pv_va)) != NULL && PTE_ISVALID(pte)) { if (PTE_ISMODIFIED(pte)) rv = TRUE; } PMAP_UNLOCK(pv->pv_pmap); if (rv) break; } rw_wunlock(&pvh_global_lock); return (rv); } /* * Return whether or not the specified virtual address is eligible * for prefault. */ static boolean_t mmu_booke_is_prefaultable(mmu_t mmu, pmap_t pmap, vm_offset_t addr) { return (FALSE); } /* * Return whether or not the specified physical page was referenced * in any physical maps. */ static boolean_t mmu_booke_is_referenced(mmu_t mmu, vm_page_t m) { pte_t *pte; pv_entry_t pv; boolean_t rv; KASSERT((m->oflags & VPO_UNMANAGED) == 0, ("mmu_booke_is_referenced: page %p is not managed", m)); rv = FALSE; rw_wlock(&pvh_global_lock); TAILQ_FOREACH(pv, &m->md.pv_list, pv_link) { PMAP_LOCK(pv->pv_pmap); if ((pte = pte_find(mmu, pv->pv_pmap, pv->pv_va)) != NULL && PTE_ISVALID(pte)) { if (PTE_ISREFERENCED(pte)) rv = TRUE; } PMAP_UNLOCK(pv->pv_pmap); if (rv) break; } rw_wunlock(&pvh_global_lock); return (rv); } /* * Clear the modify bits on the specified physical page. */ static void mmu_booke_clear_modify(mmu_t mmu, vm_page_t m) { pte_t *pte; pv_entry_t pv; KASSERT((m->oflags & VPO_UNMANAGED) == 0, ("mmu_booke_clear_modify: page %p is not managed", m)); vm_page_assert_busied(m); if (!pmap_page_is_write_mapped(m)) return; rw_wlock(&pvh_global_lock); TAILQ_FOREACH(pv, &m->md.pv_list, pv_link) { PMAP_LOCK(pv->pv_pmap); if ((pte = pte_find(mmu, pv->pv_pmap, pv->pv_va)) != NULL && PTE_ISVALID(pte)) { mtx_lock_spin(&tlbivax_mutex); tlb_miss_lock(); if (*pte & (PTE_SW | PTE_UW | PTE_MODIFIED)) { tlb0_flush_entry(pv->pv_va); *pte &= ~(PTE_SW | PTE_UW | PTE_MODIFIED | PTE_REFERENCED); } tlb_miss_unlock(); mtx_unlock_spin(&tlbivax_mutex); } PMAP_UNLOCK(pv->pv_pmap); } rw_wunlock(&pvh_global_lock); } /* * Return a count of reference bits for a page, clearing those bits. * It is not necessary for every reference bit to be cleared, but it * is necessary that 0 only be returned when there are truly no * reference bits set. * * As an optimization, update the page's dirty field if a modified bit is * found while counting reference bits. This opportunistic update can be * performed at low cost and can eliminate the need for some future calls * to pmap_is_modified(). However, since this function stops after * finding PMAP_TS_REFERENCED_MAX reference bits, it may not detect some * dirty pages. Those dirty pages will only be detected by a future call * to pmap_is_modified(). */ static int mmu_booke_ts_referenced(mmu_t mmu, vm_page_t m) { pte_t *pte; pv_entry_t pv; int count; KASSERT((m->oflags & VPO_UNMANAGED) == 0, ("mmu_booke_ts_referenced: page %p is not managed", m)); count = 0; rw_wlock(&pvh_global_lock); TAILQ_FOREACH(pv, &m->md.pv_list, pv_link) { PMAP_LOCK(pv->pv_pmap); if ((pte = pte_find(mmu, pv->pv_pmap, pv->pv_va)) != NULL && PTE_ISVALID(pte)) { if (PTE_ISMODIFIED(pte)) vm_page_dirty(m); if (PTE_ISREFERENCED(pte)) { mtx_lock_spin(&tlbivax_mutex); tlb_miss_lock(); tlb0_flush_entry(pv->pv_va); *pte &= ~PTE_REFERENCED; tlb_miss_unlock(); mtx_unlock_spin(&tlbivax_mutex); if (++count >= PMAP_TS_REFERENCED_MAX) { PMAP_UNLOCK(pv->pv_pmap); break; } } } PMAP_UNLOCK(pv->pv_pmap); } rw_wunlock(&pvh_global_lock); return (count); } /* * Clear the wired attribute from the mappings for the specified range of * addresses in the given pmap. Every valid mapping within that range must * have the wired attribute set. In contrast, invalid mappings cannot have * the wired attribute set, so they are ignored. * * The wired attribute of the page table entry is not a hardware feature, so * there is no need to invalidate any TLB entries. */ static void mmu_booke_unwire(mmu_t mmu, pmap_t pmap, vm_offset_t sva, vm_offset_t eva) { vm_offset_t va; pte_t *pte; PMAP_LOCK(pmap); for (va = sva; va < eva; va += PAGE_SIZE) { if ((pte = pte_find(mmu, pmap, va)) != NULL && PTE_ISVALID(pte)) { if (!PTE_ISWIRED(pte)) panic("mmu_booke_unwire: pte %p isn't wired", pte); *pte &= ~PTE_WIRED; pmap->pm_stats.wired_count--; } } PMAP_UNLOCK(pmap); } /* * Return true if the pmap's pv is one of the first 16 pvs linked to from this * page. This count may be changed upwards or downwards in the future; it is * only necessary that true be returned for a small subset of pmaps for proper * page aging. */ static boolean_t mmu_booke_page_exists_quick(mmu_t mmu, pmap_t pmap, vm_page_t m) { pv_entry_t pv; int loops; boolean_t rv; KASSERT((m->oflags & VPO_UNMANAGED) == 0, ("mmu_booke_page_exists_quick: page %p is not managed", m)); loops = 0; rv = FALSE; rw_wlock(&pvh_global_lock); TAILQ_FOREACH(pv, &m->md.pv_list, pv_link) { if (pv->pv_pmap == pmap) { rv = TRUE; break; } if (++loops >= 16) break; } rw_wunlock(&pvh_global_lock); return (rv); } /* * Return the number of managed mappings to the given physical page that are * wired. */ static int mmu_booke_page_wired_mappings(mmu_t mmu, vm_page_t m) { pv_entry_t pv; pte_t *pte; int count = 0; if ((m->oflags & VPO_UNMANAGED) != 0) return (count); rw_wlock(&pvh_global_lock); TAILQ_FOREACH(pv, &m->md.pv_list, pv_link) { PMAP_LOCK(pv->pv_pmap); if ((pte = pte_find(mmu, pv->pv_pmap, pv->pv_va)) != NULL) if (PTE_ISVALID(pte) && PTE_ISWIRED(pte)) count++; PMAP_UNLOCK(pv->pv_pmap); } rw_wunlock(&pvh_global_lock); return (count); } static int mmu_booke_dev_direct_mapped(mmu_t mmu, vm_paddr_t pa, vm_size_t size) { int i; vm_offset_t va; /* * This currently does not work for entries that * overlap TLB1 entries. */ for (i = 0; i < TLB1_ENTRIES; i ++) { if (tlb1_iomapped(i, pa, size, &va) == 0) return (0); } return (EFAULT); } void mmu_booke_dumpsys_map(mmu_t mmu, vm_paddr_t pa, size_t sz, void **va) { vm_paddr_t ppa; vm_offset_t ofs; vm_size_t gran; /* Minidumps are based on virtual memory addresses. */ if (do_minidump) { *va = (void *)(vm_offset_t)pa; return; } /* Raw physical memory dumps don't have a virtual address. */ /* We always map a 256MB page at 256M. */ gran = 256 * 1024 * 1024; ppa = rounddown2(pa, gran); ofs = pa - ppa; *va = (void *)gran; tlb1_set_entry((vm_offset_t)va, ppa, gran, _TLB_ENTRY_IO); if (sz > (gran - ofs)) tlb1_set_entry((vm_offset_t)(va + gran), ppa + gran, gran, _TLB_ENTRY_IO); } void mmu_booke_dumpsys_unmap(mmu_t mmu, vm_paddr_t pa, size_t sz, void *va) { vm_paddr_t ppa; vm_offset_t ofs; vm_size_t gran; tlb_entry_t e; int i; /* Minidumps are based on virtual memory addresses. */ /* Nothing to do... */ if (do_minidump) return; for (i = 0; i < TLB1_ENTRIES; i++) { tlb1_read_entry(&e, i); if (!(e.mas1 & MAS1_VALID)) break; } /* Raw physical memory dumps don't have a virtual address. */ i--; e.mas1 = 0; e.mas2 = 0; e.mas3 = 0; tlb1_write_entry(&e, i); gran = 256 * 1024 * 1024; ppa = rounddown2(pa, gran); ofs = pa - ppa; if (sz > (gran - ofs)) { i--; e.mas1 = 0; e.mas2 = 0; e.mas3 = 0; tlb1_write_entry(&e, i); } } extern struct dump_pa dump_map[PHYS_AVAIL_SZ + 1]; void mmu_booke_scan_init(mmu_t mmu) { vm_offset_t va; pte_t *pte; int i; if (!do_minidump) { /* Initialize phys. segments for dumpsys(). */ memset(&dump_map, 0, sizeof(dump_map)); mem_regions(&physmem_regions, &physmem_regions_sz, &availmem_regions, &availmem_regions_sz); for (i = 0; i < physmem_regions_sz; i++) { dump_map[i].pa_start = physmem_regions[i].mr_start; dump_map[i].pa_size = physmem_regions[i].mr_size; } return; } /* Virtual segments for minidumps: */ memset(&dump_map, 0, sizeof(dump_map)); /* 1st: kernel .data and .bss. */ dump_map[0].pa_start = trunc_page((uintptr_t)_etext); dump_map[0].pa_size = round_page((uintptr_t)_end) - dump_map[0].pa_start; /* 2nd: msgbuf and tables (see pmap_bootstrap()). */ dump_map[1].pa_start = data_start; dump_map[1].pa_size = data_end - data_start; /* 3rd: kernel VM. */ va = dump_map[1].pa_start + dump_map[1].pa_size; /* Find start of next chunk (from va). */ while (va < virtual_end) { /* Don't dump the buffer cache. */ if (va >= kmi.buffer_sva && va < kmi.buffer_eva) { va = kmi.buffer_eva; continue; } pte = pte_find(mmu, kernel_pmap, va); if (pte != NULL && PTE_ISVALID(pte)) break; va += PAGE_SIZE; } if (va < virtual_end) { dump_map[2].pa_start = va; va += PAGE_SIZE; /* Find last page in chunk. */ while (va < virtual_end) { /* Don't run into the buffer cache. */ if (va == kmi.buffer_sva) break; pte = pte_find(mmu, kernel_pmap, va); if (pte == NULL || !PTE_ISVALID(pte)) break; va += PAGE_SIZE; } dump_map[2].pa_size = va - dump_map[2].pa_start; } } /* * Map a set of physical memory pages into the kernel virtual address space. * Return a pointer to where it is mapped. This routine is intended to be used * for mapping device memory, NOT real memory. */ static void * mmu_booke_mapdev(mmu_t mmu, vm_paddr_t pa, vm_size_t size) { return (mmu_booke_mapdev_attr(mmu, pa, size, VM_MEMATTR_DEFAULT)); } static int tlb1_find_pa(vm_paddr_t pa, tlb_entry_t *e) { int i; for (i = 0; i < TLB1_ENTRIES; i++) { tlb1_read_entry(e, i); if ((e->mas1 & MAS1_VALID) == 0) return (i); } return (-1); } static void * mmu_booke_mapdev_attr(mmu_t mmu, vm_paddr_t pa, vm_size_t size, vm_memattr_t ma) { tlb_entry_t e; vm_paddr_t tmppa; #ifndef __powerpc64__ uintptr_t tmpva; #endif uintptr_t va; vm_size_t sz; int i; int wimge; /* * Check if this is premapped in TLB1. */ sz = size; tmppa = pa; va = ~0; wimge = tlb_calc_wimg(pa, ma); for (i = 0; i < TLB1_ENTRIES; i++) { tlb1_read_entry(&e, i); if (!(e.mas1 & MAS1_VALID)) continue; if (wimge != (e.mas2 & (MAS2_WIMGE_MASK & ~_TLB_ENTRY_SHARED))) continue; if (tmppa >= e.phys && tmppa < e.phys + e.size) { va = e.virt + (pa - e.phys); tmppa = e.phys + e.size; sz -= MIN(sz, e.size); while (sz > 0 && (i = tlb1_find_pa(tmppa, &e)) != -1) { if (wimge != (e.mas2 & (MAS2_WIMGE_MASK & ~_TLB_ENTRY_SHARED))) break; sz -= MIN(sz, e.size); tmppa = e.phys + e.size; } if (sz != 0) break; return ((void *)va); } } size = roundup(size, PAGE_SIZE); #ifdef __powerpc64__ KASSERT(pa < VM_MAPDEV_PA_MAX, ("Unsupported physical address! %lx", pa)); va = VM_MAPDEV_BASE + pa; #else /* * The device mapping area is between VM_MAXUSER_ADDRESS and * VM_MIN_KERNEL_ADDRESS. This gives 1GB of device addressing. */ #ifdef SPARSE_MAPDEV /* * With a sparse mapdev, align to the largest starting region. This * could feasibly be optimized for a 'best-fit' alignment, but that * calculation could be very costly. * Align to the smaller of: * - first set bit in overlap of (pa & size mask) * - largest size envelope * * It's possible the device mapping may start at a PA that's not larger * than the size mask, so we need to offset in to maximize the TLB entry * range and minimize the number of used TLB entries. */ do { tmpva = tlb1_map_base; sz = ffsl((~((1 << flsl(size-1)) - 1)) & pa); sz = sz ? min(roundup(sz + 3, 4), flsl(size) - 1) : flsl(size) - 1; va = roundup(tlb1_map_base, 1 << sz) | (((1 << sz) - 1) & pa); } while (!atomic_cmpset_int(&tlb1_map_base, tmpva, va + size)); va = atomic_fetchadd_int(&tlb1_map_base, size); #endif #endif if (tlb1_mapin_region(va, pa, size, tlb_calc_wimg(pa, ma)) != size) return (NULL); return ((void *)va); } /* * 'Unmap' a range mapped by mmu_booke_mapdev(). */ static void mmu_booke_unmapdev(mmu_t mmu, vm_offset_t va, vm_size_t size) { #ifdef SUPPORTS_SHRINKING_TLB1 vm_offset_t base, offset; /* * Unmap only if this is inside kernel virtual space. */ if ((va >= VM_MIN_KERNEL_ADDRESS) && (va <= VM_MAX_KERNEL_ADDRESS)) { base = trunc_page(va); offset = va & PAGE_MASK; size = roundup(offset + size, PAGE_SIZE); kva_free(base, size); } #endif } /* * mmu_booke_object_init_pt preloads the ptes for a given object into the * specified pmap. This eliminates the blast of soft faults on process startup * and immediately after an mmap. */ static void mmu_booke_object_init_pt(mmu_t mmu, pmap_t pmap, vm_offset_t addr, vm_object_t object, vm_pindex_t pindex, vm_size_t size) { VM_OBJECT_ASSERT_WLOCKED(object); KASSERT(object->type == OBJT_DEVICE || object->type == OBJT_SG, ("mmu_booke_object_init_pt: non-device object")); } /* * Perform the pmap work for mincore. */ static int mmu_booke_mincore(mmu_t mmu, pmap_t pmap, vm_offset_t addr, vm_paddr_t *pap) { /* XXX: this should be implemented at some point */ return (0); } static int mmu_booke_change_attr(mmu_t mmu, vm_offset_t addr, vm_size_t sz, vm_memattr_t mode) { vm_offset_t va; pte_t *pte; int i, j; tlb_entry_t e; addr = trunc_page(addr); /* Only allow changes to mapped kernel addresses. This includes: * - KVA * - DMAP (powerpc64) * - Device mappings */ if (addr <= VM_MAXUSER_ADDRESS || #ifdef __powerpc64__ (addr >= tlb1_map_base && addr < DMAP_BASE_ADDRESS) || (addr > DMAP_MAX_ADDRESS && addr < VM_MIN_KERNEL_ADDRESS) || #else (addr >= tlb1_map_base && addr < VM_MIN_KERNEL_ADDRESS) || #endif (addr > VM_MAX_KERNEL_ADDRESS)) return (EINVAL); /* Check TLB1 mappings */ for (i = 0; i < TLB1_ENTRIES; i++) { tlb1_read_entry(&e, i); if (!(e.mas1 & MAS1_VALID)) continue; if (addr >= e.virt && addr < e.virt + e.size) break; } if (i < TLB1_ENTRIES) { /* Only allow full mappings to be modified for now. */ /* Validate the range. */ for (j = i, va = addr; va < addr + sz; va += e.size, j++) { tlb1_read_entry(&e, j); if (va != e.virt || (sz - (va - addr) < e.size)) return (EINVAL); } for (va = addr; va < addr + sz; va += e.size, i++) { tlb1_read_entry(&e, i); e.mas2 &= ~MAS2_WIMGE_MASK; e.mas2 |= tlb_calc_wimg(e.phys, mode); /* * Write it out to the TLB. Should really re-sync with other * cores. */ tlb1_write_entry(&e, i); } return (0); } /* Not in TLB1, try through pmap */ /* First validate the range. */ for (va = addr; va < addr + sz; va += PAGE_SIZE) { pte = pte_find(mmu, kernel_pmap, va); if (pte == NULL || !PTE_ISVALID(pte)) return (EINVAL); } mtx_lock_spin(&tlbivax_mutex); tlb_miss_lock(); for (va = addr; va < addr + sz; va += PAGE_SIZE) { pte = pte_find(mmu, kernel_pmap, va); *pte &= ~(PTE_MAS2_MASK << PTE_MAS2_SHIFT); *pte |= tlb_calc_wimg(PTE_PA(pte), mode) << PTE_MAS2_SHIFT; tlb0_flush_entry(va); } tlb_miss_unlock(); mtx_unlock_spin(&tlbivax_mutex); return (0); } static void mmu_booke_page_array_startup(mmu_t mmu, long pages) { vm_page_array_size = pages; } /**************************************************************************/ /* TID handling */ /**************************************************************************/ /* * Allocate a TID. If necessary, steal one from someone else. * The new TID is flushed from the TLB before returning. */ static tlbtid_t tid_alloc(pmap_t pmap) { tlbtid_t tid; int thiscpu; KASSERT((pmap != kernel_pmap), ("tid_alloc: kernel pmap")); CTR2(KTR_PMAP, "%s: s (pmap = %p)", __func__, pmap); thiscpu = PCPU_GET(cpuid); tid = PCPU_GET(booke.tid_next); if (tid > TID_MAX) tid = TID_MIN; PCPU_SET(booke.tid_next, tid + 1); /* If we are stealing TID then clear the relevant pmap's field */ if (tidbusy[thiscpu][tid] != NULL) { CTR2(KTR_PMAP, "%s: warning: stealing tid %d", __func__, tid); tidbusy[thiscpu][tid]->pm_tid[thiscpu] = TID_NONE; /* Flush all entries from TLB0 matching this TID. */ tid_flush(tid); } tidbusy[thiscpu][tid] = pmap; pmap->pm_tid[thiscpu] = tid; __asm __volatile("msync; isync"); CTR3(KTR_PMAP, "%s: e (%02d next = %02d)", __func__, tid, PCPU_GET(booke.tid_next)); return (tid); } /**************************************************************************/ /* TLB0 handling */ /**************************************************************************/ /* Convert TLB0 va and way number to tlb0[] table index. */ static inline unsigned int tlb0_tableidx(vm_offset_t va, unsigned int way) { unsigned int idx; idx = (way * TLB0_ENTRIES_PER_WAY); idx += (va & MAS2_TLB0_ENTRY_IDX_MASK) >> MAS2_TLB0_ENTRY_IDX_SHIFT; return (idx); } /* * Invalidate TLB0 entry. */ static inline void tlb0_flush_entry(vm_offset_t va) { CTR2(KTR_PMAP, "%s: s va=0x%08x", __func__, va); mtx_assert(&tlbivax_mutex, MA_OWNED); __asm __volatile("tlbivax 0, %0" :: "r"(va & MAS2_EPN_MASK)); __asm __volatile("isync; msync"); __asm __volatile("tlbsync; msync"); CTR1(KTR_PMAP, "%s: e", __func__); } /**************************************************************************/ /* TLB1 handling */ /**************************************************************************/ /* * TLB1 mapping notes: * * TLB1[0] Kernel text and data. * TLB1[1-15] Additional kernel text and data mappings (if required), PCI * windows, other devices mappings. */ /* * Read an entry from given TLB1 slot. */ void tlb1_read_entry(tlb_entry_t *entry, unsigned int slot) { register_t msr; uint32_t mas0; KASSERT((entry != NULL), ("%s(): Entry is NULL!", __func__)); msr = mfmsr(); __asm __volatile("wrteei 0"); mas0 = MAS0_TLBSEL(1) | MAS0_ESEL(slot); mtspr(SPR_MAS0, mas0); __asm __volatile("isync; tlbre"); entry->mas1 = mfspr(SPR_MAS1); entry->mas2 = mfspr(SPR_MAS2); entry->mas3 = mfspr(SPR_MAS3); switch ((mfpvr() >> 16) & 0xFFFF) { case FSL_E500v2: case FSL_E500mc: case FSL_E5500: case FSL_E6500: entry->mas7 = mfspr(SPR_MAS7); break; default: entry->mas7 = 0; break; } __asm __volatile("wrtee %0" :: "r"(msr)); entry->virt = entry->mas2 & MAS2_EPN_MASK; entry->phys = ((vm_paddr_t)(entry->mas7 & MAS7_RPN) << 32) | (entry->mas3 & MAS3_RPN); entry->size = tsize2size((entry->mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT); } struct tlbwrite_args { tlb_entry_t *e; unsigned int idx; }; static uint32_t tlb1_find_free(void) { tlb_entry_t e; int i; for (i = 0; i < TLB1_ENTRIES; i++) { tlb1_read_entry(&e, i); if ((e.mas1 & MAS1_VALID) == 0) return (i); } return (-1); } static void tlb1_write_entry_int(void *arg) { struct tlbwrite_args *args = arg; uint32_t idx, mas0; idx = args->idx; if (idx == -1) { idx = tlb1_find_free(); if (idx == -1) panic("No free TLB1 entries!\n"); } /* Select entry */ mas0 = MAS0_TLBSEL(1) | MAS0_ESEL(idx); mtspr(SPR_MAS0, mas0); mtspr(SPR_MAS1, args->e->mas1); mtspr(SPR_MAS2, args->e->mas2); mtspr(SPR_MAS3, args->e->mas3); switch ((mfpvr() >> 16) & 0xFFFF) { case FSL_E500mc: case FSL_E5500: case FSL_E6500: mtspr(SPR_MAS8, 0); /* FALLTHROUGH */ case FSL_E500v2: mtspr(SPR_MAS7, args->e->mas7); break; default: break; } __asm __volatile("isync; tlbwe; isync; msync"); } static void tlb1_write_entry_sync(void *arg) { /* Empty synchronization point for smp_rendezvous(). */ } /* * Write given entry to TLB1 hardware. */ static void tlb1_write_entry(tlb_entry_t *e, unsigned int idx) { struct tlbwrite_args args; args.e = e; args.idx = idx; #ifdef SMP if ((e->mas2 & _TLB_ENTRY_SHARED) && smp_started) { mb(); smp_rendezvous(tlb1_write_entry_sync, tlb1_write_entry_int, tlb1_write_entry_sync, &args); } else #endif { register_t msr; msr = mfmsr(); __asm __volatile("wrteei 0"); tlb1_write_entry_int(&args); __asm __volatile("wrtee %0" :: "r"(msr)); } } /* * Convert TLB TSIZE value to mapped region size. */ static vm_size_t tsize2size(unsigned int tsize) { /* * size = 4^tsize KB * size = 4^tsize * 2^10 = 2^(2 * tsize - 10) */ return ((1 << (2 * tsize)) * 1024); } /* * Convert region size (must be power of 4) to TLB TSIZE value. */ static unsigned int size2tsize(vm_size_t size) { return (ilog2(size) / 2 - 5); } /* * Register permanent kernel mapping in TLB1. * * Entries are created starting from index 0 (current free entry is * kept in tlb1_idx) and are not supposed to be invalidated. */ int tlb1_set_entry(vm_offset_t va, vm_paddr_t pa, vm_size_t size, uint32_t flags) { tlb_entry_t e; uint32_t ts, tid; int tsize, index; /* First try to update an existing entry. */ for (index = 0; index < TLB1_ENTRIES; index++) { tlb1_read_entry(&e, index); /* Check if we're just updating the flags, and update them. */ if (e.phys == pa && e.virt == va && e.size == size) { e.mas2 = (va & MAS2_EPN_MASK) | flags; tlb1_write_entry(&e, index); return (0); } } /* Convert size to TSIZE */ tsize = size2tsize(size); tid = (TID_KERNEL << MAS1_TID_SHIFT) & MAS1_TID_MASK; /* XXX TS is hard coded to 0 for now as we only use single address space */ ts = (0 << MAS1_TS_SHIFT) & MAS1_TS_MASK; e.phys = pa; e.virt = va; e.size = size; e.mas1 = MAS1_VALID | MAS1_IPROT | ts | tid; e.mas1 |= ((tsize << MAS1_TSIZE_SHIFT) & MAS1_TSIZE_MASK); e.mas2 = (va & MAS2_EPN_MASK) | flags; /* Set supervisor RWX permission bits */ e.mas3 = (pa & MAS3_RPN) | MAS3_SR | MAS3_SW | MAS3_SX; e.mas7 = (pa >> 32) & MAS7_RPN; tlb1_write_entry(&e, -1); return (0); } /* * Map in contiguous RAM region into the TLB1. */ static vm_size_t tlb1_mapin_region(vm_offset_t va, vm_paddr_t pa, vm_size_t size, int wimge) { vm_offset_t base; vm_size_t mapped, sz, ssize; mapped = 0; base = va; ssize = size; while (size > 0) { sz = 1UL << (ilog2(size) & ~1); /* Align size to PA */ if (pa % sz != 0) { do { sz >>= 2; } while (pa % sz != 0); } /* Now align from there to VA */ if (va % sz != 0) { do { sz >>= 2; } while (va % sz != 0); } #ifdef __powerpc64__ /* * Clamp TLB1 entries to 4G. * * While the e6500 supports up to 1TB mappings, the e5500 * only supports up to 4G mappings. (0b1011) * * If any e6500 machines capable of supporting a very * large amount of memory appear in the future, we can * revisit this. * * For now, though, since we have plenty of space in TLB1, * always avoid creating entries larger than 4GB. */ sz = MIN(sz, 1UL << 32); #endif if (bootverbose) printf("Wiring VA=%p to PA=%jx (size=%lx)\n", (void *)va, (uintmax_t)pa, (long)sz); if (tlb1_set_entry(va, pa, sz, _TLB_ENTRY_SHARED | wimge) < 0) return (mapped); size -= sz; pa += sz; va += sz; } mapped = (va - base); if (bootverbose) printf("mapped size 0x%"PRIxPTR" (wasted space 0x%"PRIxPTR")\n", mapped, mapped - ssize); return (mapped); } /* * TLB1 initialization routine, to be called after the very first * assembler level setup done in locore.S. */ void tlb1_init() { vm_offset_t mas2; uint32_t mas0, mas1, mas3, mas7; uint32_t tsz; tlb1_get_tlbconf(); mas0 = MAS0_TLBSEL(1) | MAS0_ESEL(0); mtspr(SPR_MAS0, mas0); __asm __volatile("isync; tlbre"); mas1 = mfspr(SPR_MAS1); mas2 = mfspr(SPR_MAS2); mas3 = mfspr(SPR_MAS3); mas7 = mfspr(SPR_MAS7); kernload = ((vm_paddr_t)(mas7 & MAS7_RPN) << 32) | (mas3 & MAS3_RPN); tsz = (mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT; kernsize += (tsz > 0) ? tsize2size(tsz) : 0; kernstart = trunc_page(mas2); /* Setup TLB miss defaults */ set_mas4_defaults(); } /* * pmap_early_io_unmap() should be used in short conjunction with * pmap_early_io_map(), as in the following snippet: * * x = pmap_early_io_map(...); * * pmap_early_io_unmap(x, size); * * And avoiding more allocations between. */ void pmap_early_io_unmap(vm_offset_t va, vm_size_t size) { int i; tlb_entry_t e; vm_size_t isize; size = roundup(size, PAGE_SIZE); isize = size; for (i = 0; i < TLB1_ENTRIES && size > 0; i++) { tlb1_read_entry(&e, i); if (!(e.mas1 & MAS1_VALID)) continue; if (va <= e.virt && (va + isize) >= (e.virt + e.size)) { size -= e.size; e.mas1 &= ~MAS1_VALID; tlb1_write_entry(&e, i); } } if (tlb1_map_base == va + isize) tlb1_map_base -= isize; } vm_offset_t pmap_early_io_map(vm_paddr_t pa, vm_size_t size) { vm_paddr_t pa_base; vm_offset_t va, sz; int i; tlb_entry_t e; KASSERT(!pmap_bootstrapped, ("Do not use after PMAP is up!")); for (i = 0; i < TLB1_ENTRIES; i++) { tlb1_read_entry(&e, i); if (!(e.mas1 & MAS1_VALID)) continue; if (pa >= e.phys && (pa + size) <= (e.phys + e.size)) return (e.virt + (pa - e.phys)); } pa_base = rounddown(pa, PAGE_SIZE); size = roundup(size + (pa - pa_base), PAGE_SIZE); tlb1_map_base = roundup2(tlb1_map_base, 1 << (ilog2(size) & ~1)); va = tlb1_map_base + (pa - pa_base); do { sz = 1 << (ilog2(size) & ~1); tlb1_set_entry(tlb1_map_base, pa_base, sz, _TLB_ENTRY_SHARED | _TLB_ENTRY_IO); size -= sz; pa_base += sz; tlb1_map_base += sz; } while (size > 0); return (va); } void pmap_track_page(pmap_t pmap, vm_offset_t va) { vm_paddr_t pa; vm_page_t page; struct pv_entry *pve; va = trunc_page(va); pa = pmap_kextract(va); page = PHYS_TO_VM_PAGE(pa); rw_wlock(&pvh_global_lock); PMAP_LOCK(pmap); TAILQ_FOREACH(pve, &page->md.pv_list, pv_link) { if ((pmap == pve->pv_pmap) && (va == pve->pv_va)) { goto out; } } page->md.pv_tracked = true; pv_insert(pmap, va, page); out: PMAP_UNLOCK(pmap); rw_wunlock(&pvh_global_lock); } /* * Setup MAS4 defaults. * These values are loaded to MAS0-2 on a TLB miss. */ static void set_mas4_defaults(void) { uint32_t mas4; /* Defaults: TLB0, PID0, TSIZED=4K */ mas4 = MAS4_TLBSELD0; mas4 |= (TLB_SIZE_4K << MAS4_TSIZED_SHIFT) & MAS4_TSIZED_MASK; #ifdef SMP mas4 |= MAS4_MD; #endif mtspr(SPR_MAS4, mas4); __asm __volatile("isync"); } /* * Return 0 if the physical IO range is encompassed by one of the * the TLB1 entries, otherwise return related error code. */ static int tlb1_iomapped(int i, vm_paddr_t pa, vm_size_t size, vm_offset_t *va) { uint32_t prot; vm_paddr_t pa_start; vm_paddr_t pa_end; unsigned int entry_tsize; vm_size_t entry_size; tlb_entry_t e; *va = (vm_offset_t)NULL; tlb1_read_entry(&e, i); /* Skip invalid entries */ if (!(e.mas1 & MAS1_VALID)) return (EINVAL); /* * The entry must be cache-inhibited, guarded, and r/w * so it can function as an i/o page */ prot = e.mas2 & (MAS2_I | MAS2_G); if (prot != (MAS2_I | MAS2_G)) return (EPERM); prot = e.mas3 & (MAS3_SR | MAS3_SW); if (prot != (MAS3_SR | MAS3_SW)) return (EPERM); /* The address should be within the entry range. */ entry_tsize = (e.mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT; KASSERT((entry_tsize), ("tlb1_iomapped: invalid entry tsize")); entry_size = tsize2size(entry_tsize); pa_start = (((vm_paddr_t)e.mas7 & MAS7_RPN) << 32) | (e.mas3 & MAS3_RPN); pa_end = pa_start + entry_size; if ((pa < pa_start) || ((pa + size) > pa_end)) return (ERANGE); /* Return virtual address of this mapping. */ *va = (e.mas2 & MAS2_EPN_MASK) + (pa - pa_start); return (0); } #ifdef DDB /* Print out contents of the MAS registers for each TLB0 entry */ static void #ifdef __powerpc64__ tlb_print_entry(int i, uint32_t mas1, uint64_t mas2, uint32_t mas3, #else tlb_print_entry(int i, uint32_t mas1, uint32_t mas2, uint32_t mas3, #endif uint32_t mas7) { int as; char desc[3]; tlbtid_t tid; vm_size_t size; unsigned int tsize; desc[2] = '\0'; if (mas1 & MAS1_VALID) desc[0] = 'V'; else desc[0] = ' '; if (mas1 & MAS1_IPROT) desc[1] = 'P'; else desc[1] = ' '; as = (mas1 & MAS1_TS_MASK) ? 1 : 0; tid = MAS1_GETTID(mas1); tsize = (mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT; size = 0; if (tsize) size = tsize2size(tsize); printf("%3d: (%s) [AS=%d] " "sz = 0x%jx tsz = %d tid = %d mas1 = 0x%08x " "mas2(va) = 0x%"PRI0ptrX" mas3(pa) = 0x%08x mas7 = 0x%08x\n", i, desc, as, (uintmax_t)size, tsize, tid, mas1, mas2, mas3, mas7); } DB_SHOW_COMMAND(tlb0, tlb0_print_tlbentries) { uint32_t mas0, mas1, mas3, mas7; #ifdef __powerpc64__ uint64_t mas2; #else uint32_t mas2; #endif int entryidx, way, idx; printf("TLB0 entries:\n"); for (way = 0; way < TLB0_WAYS; way ++) for (entryidx = 0; entryidx < TLB0_ENTRIES_PER_WAY; entryidx++) { mas0 = MAS0_TLBSEL(0) | MAS0_ESEL(way); mtspr(SPR_MAS0, mas0); mas2 = entryidx << MAS2_TLB0_ENTRY_IDX_SHIFT; mtspr(SPR_MAS2, mas2); __asm __volatile("isync; tlbre"); mas1 = mfspr(SPR_MAS1); mas2 = mfspr(SPR_MAS2); mas3 = mfspr(SPR_MAS3); mas7 = mfspr(SPR_MAS7); idx = tlb0_tableidx(mas2, way); tlb_print_entry(idx, mas1, mas2, mas3, mas7); } } /* * Print out contents of the MAS registers for each TLB1 entry */ DB_SHOW_COMMAND(tlb1, tlb1_print_tlbentries) { uint32_t mas0, mas1, mas3, mas7; #ifdef __powerpc64__ uint64_t mas2; #else uint32_t mas2; #endif int i; printf("TLB1 entries:\n"); for (i = 0; i < TLB1_ENTRIES; i++) { mas0 = MAS0_TLBSEL(1) | MAS0_ESEL(i); mtspr(SPR_MAS0, mas0); __asm __volatile("isync; tlbre"); mas1 = mfspr(SPR_MAS1); mas2 = mfspr(SPR_MAS2); mas3 = mfspr(SPR_MAS3); mas7 = mfspr(SPR_MAS7); tlb_print_entry(i, mas1, mas2, mas3, mas7); } } #endif Index: head/sys/powerpc/booke/pmap_32.c =================================================================== --- head/sys/powerpc/booke/pmap_32.c (revision 359791) +++ head/sys/powerpc/booke/pmap_32.c (revision 359792) @@ -1,969 +1,998 @@ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (C) 2020 Justin Hibbits * Copyright (C) 2007-2009 Semihalf, Rafal Jaworowski * Copyright (C) 2006 Semihalf, Marian Balakowicz * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * Some hw specific parts of this pmap were derived or influenced * by NetBSD's ibm4xx pmap module. More generic code is shared with * a few other pmap modules from the FreeBSD tree. */ /* * VM layout notes: * * Kernel and user threads run within one common virtual address space * defined by AS=0. * * 32-bit pmap: * Virtual address space layout: * ----------------------------- * 0x0000_0000 - 0x7fff_ffff : user process * 0x8000_0000 - 0xbfff_ffff : pmap_mapdev()-ed area (PCI/PCIE etc.) * 0xc000_0000 - 0xffff_efff : KVA */ #include __FBSDID("$FreeBSD$"); #include "opt_ddb.h" #include "opt_kstack_pages.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "mmu_if.h" #define PRI0ptrX "08x" /* Reserved KVA space and mutex for mmu_booke_zero_page. */ static vm_offset_t zero_page_va; static struct mtx zero_page_mutex; /* Reserved KVA space and mutex for mmu_booke_copy_page. */ static vm_offset_t copy_page_src_va; static vm_offset_t copy_page_dst_va; static struct mtx copy_page_mutex; static vm_offset_t kernel_ptbl_root; static unsigned int kernel_ptbls; /* Number of KVA ptbls. */ /**************************************************************************/ /* PMAP */ /**************************************************************************/ #define VM_MAPDEV_BASE ((vm_offset_t)VM_MAXUSER_ADDRESS + PAGE_SIZE) static void tid_flush(tlbtid_t tid); static unsigned long ilog2(unsigned long); /**************************************************************************/ /* Page table management */ /**************************************************************************/ #define PMAP_ROOT_SIZE (sizeof(pte_t**) * PDIR_NENTRIES) static void ptbl_init(void); static struct ptbl_buf *ptbl_buf_alloc(void); static void ptbl_buf_free(struct ptbl_buf *); static void ptbl_free_pmap_ptbl(pmap_t, pte_t *); static pte_t *ptbl_alloc(mmu_t, pmap_t, unsigned int, boolean_t); static void ptbl_free(mmu_t, pmap_t, unsigned int); static void ptbl_hold(mmu_t, pmap_t, unsigned int); static int ptbl_unhold(mmu_t, pmap_t, unsigned int); static vm_paddr_t pte_vatopa(mmu_t, pmap_t, vm_offset_t); static int pte_enter(mmu_t, pmap_t, vm_page_t, vm_offset_t, uint32_t, boolean_t); static int pte_remove(mmu_t, pmap_t, vm_offset_t, uint8_t); static pte_t *pte_find(mmu_t, pmap_t, vm_offset_t); struct ptbl_buf { TAILQ_ENTRY(ptbl_buf) link; /* list link */ vm_offset_t kva; /* va of mapping */ }; /* Number of kva ptbl buffers, each covering one ptbl (PTBL_PAGES). */ #define PTBL_BUFS (128 * 16) /* ptbl free list and a lock used for access synchronization. */ static TAILQ_HEAD(, ptbl_buf) ptbl_buf_freelist; static struct mtx ptbl_buf_freelist_lock; /* Base address of kva space allocated fot ptbl bufs. */ static vm_offset_t ptbl_buf_pool_vabase; /* Pointer to ptbl_buf structures. */ static struct ptbl_buf *ptbl_bufs; /**************************************************************************/ /* Page table related */ /**************************************************************************/ /* Initialize pool of kva ptbl buffers. */ static void ptbl_init(void) { int i; CTR3(KTR_PMAP, "%s: s (ptbl_bufs = 0x%08x size 0x%08x)", __func__, (uint32_t)ptbl_bufs, sizeof(struct ptbl_buf) * PTBL_BUFS); CTR3(KTR_PMAP, "%s: s (ptbl_buf_pool_vabase = 0x%08x size = 0x%08x)", __func__, ptbl_buf_pool_vabase, PTBL_BUFS * PTBL_PAGES * PAGE_SIZE); mtx_init(&ptbl_buf_freelist_lock, "ptbl bufs lock", NULL, MTX_DEF); TAILQ_INIT(&ptbl_buf_freelist); for (i = 0; i < PTBL_BUFS; i++) { ptbl_bufs[i].kva = ptbl_buf_pool_vabase + i * PTBL_PAGES * PAGE_SIZE; TAILQ_INSERT_TAIL(&ptbl_buf_freelist, &ptbl_bufs[i], link); } } /* Get a ptbl_buf from the freelist. */ static struct ptbl_buf * ptbl_buf_alloc(void) { struct ptbl_buf *buf; mtx_lock(&ptbl_buf_freelist_lock); buf = TAILQ_FIRST(&ptbl_buf_freelist); if (buf != NULL) TAILQ_REMOVE(&ptbl_buf_freelist, buf, link); mtx_unlock(&ptbl_buf_freelist_lock); CTR2(KTR_PMAP, "%s: buf = %p", __func__, buf); return (buf); } /* Return ptbl buff to free pool. */ static void ptbl_buf_free(struct ptbl_buf *buf) { CTR2(KTR_PMAP, "%s: buf = %p", __func__, buf); mtx_lock(&ptbl_buf_freelist_lock); TAILQ_INSERT_TAIL(&ptbl_buf_freelist, buf, link); mtx_unlock(&ptbl_buf_freelist_lock); } /* * Search the list of allocated ptbl bufs and find on list of allocated ptbls */ static void ptbl_free_pmap_ptbl(pmap_t pmap, pte_t *ptbl) { struct ptbl_buf *pbuf; CTR2(KTR_PMAP, "%s: ptbl = %p", __func__, ptbl); PMAP_LOCK_ASSERT(pmap, MA_OWNED); TAILQ_FOREACH(pbuf, &pmap->pm_ptbl_list, link) if (pbuf->kva == (vm_offset_t)ptbl) { /* Remove from pmap ptbl buf list. */ TAILQ_REMOVE(&pmap->pm_ptbl_list, pbuf, link); /* Free corresponding ptbl buf. */ ptbl_buf_free(pbuf); break; } } /* Allocate page table. */ static pte_t * ptbl_alloc(mmu_t mmu, pmap_t pmap, unsigned int pdir_idx, boolean_t nosleep) { vm_page_t mtbl[PTBL_PAGES]; vm_page_t m; struct ptbl_buf *pbuf; unsigned int pidx; pte_t *ptbl; int i, j; CTR4(KTR_PMAP, "%s: pmap = %p su = %d pdir_idx = %d", __func__, pmap, (pmap == kernel_pmap), pdir_idx); KASSERT((pdir_idx <= (VM_MAXUSER_ADDRESS / PDIR_SIZE)), ("ptbl_alloc: invalid pdir_idx")); KASSERT((pmap->pm_pdir[pdir_idx] == NULL), ("pte_alloc: valid ptbl entry exists!")); pbuf = ptbl_buf_alloc(); if (pbuf == NULL) panic("pte_alloc: couldn't alloc kernel virtual memory"); ptbl = (pte_t *)pbuf->kva; CTR2(KTR_PMAP, "%s: ptbl kva = %p", __func__, ptbl); for (i = 0; i < PTBL_PAGES; i++) { pidx = (PTBL_PAGES * pdir_idx) + i; while ((m = vm_page_alloc(NULL, pidx, VM_ALLOC_NOOBJ | VM_ALLOC_WIRED)) == NULL) { if (nosleep) { ptbl_free_pmap_ptbl(pmap, ptbl); for (j = 0; j < i; j++) vm_page_free(mtbl[j]); vm_wire_sub(i); return (NULL); } PMAP_UNLOCK(pmap); rw_wunlock(&pvh_global_lock); vm_wait(NULL); rw_wlock(&pvh_global_lock); PMAP_LOCK(pmap); } mtbl[i] = m; } /* Map allocated pages into kernel_pmap. */ mmu_booke_qenter(mmu, (vm_offset_t)ptbl, mtbl, PTBL_PAGES); /* Zero whole ptbl. */ bzero((caddr_t)ptbl, PTBL_PAGES * PAGE_SIZE); /* Add pbuf to the pmap ptbl bufs list. */ TAILQ_INSERT_TAIL(&pmap->pm_ptbl_list, pbuf, link); return (ptbl); } /* Free ptbl pages and invalidate pdir entry. */ static void ptbl_free(mmu_t mmu, pmap_t pmap, unsigned int pdir_idx) { pte_t *ptbl; vm_paddr_t pa; vm_offset_t va; vm_page_t m; int i; CTR4(KTR_PMAP, "%s: pmap = %p su = %d pdir_idx = %d", __func__, pmap, (pmap == kernel_pmap), pdir_idx); KASSERT((pdir_idx <= (VM_MAXUSER_ADDRESS / PDIR_SIZE)), ("ptbl_free: invalid pdir_idx")); ptbl = pmap->pm_pdir[pdir_idx]; CTR2(KTR_PMAP, "%s: ptbl = %p", __func__, ptbl); KASSERT((ptbl != NULL), ("ptbl_free: null ptbl")); /* * Invalidate the pdir entry as soon as possible, so that other CPUs * don't attempt to look up the page tables we are releasing. */ mtx_lock_spin(&tlbivax_mutex); tlb_miss_lock(); pmap->pm_pdir[pdir_idx] = NULL; tlb_miss_unlock(); mtx_unlock_spin(&tlbivax_mutex); for (i = 0; i < PTBL_PAGES; i++) { va = ((vm_offset_t)ptbl + (i * PAGE_SIZE)); pa = pte_vatopa(mmu, kernel_pmap, va); m = PHYS_TO_VM_PAGE(pa); vm_page_free_zero(m); vm_wire_sub(1); mmu_booke_kremove(mmu, va); } ptbl_free_pmap_ptbl(pmap, ptbl); } /* * Decrement ptbl pages hold count and attempt to free ptbl pages. * Called when removing pte entry from ptbl. * * Return 1 if ptbl pages were freed. */ static int ptbl_unhold(mmu_t mmu, pmap_t pmap, unsigned int pdir_idx) { pte_t *ptbl; vm_paddr_t pa; vm_page_t m; int i; CTR4(KTR_PMAP, "%s: pmap = %p su = %d pdir_idx = %d", __func__, pmap, (pmap == kernel_pmap), pdir_idx); KASSERT((pdir_idx <= (VM_MAXUSER_ADDRESS / PDIR_SIZE)), ("ptbl_unhold: invalid pdir_idx")); KASSERT((pmap != kernel_pmap), ("ptbl_unhold: unholding kernel ptbl!")); ptbl = pmap->pm_pdir[pdir_idx]; //debugf("ptbl_unhold: ptbl = 0x%08x\n", (u_int32_t)ptbl); KASSERT(((vm_offset_t)ptbl >= VM_MIN_KERNEL_ADDRESS), ("ptbl_unhold: non kva ptbl")); /* decrement hold count */ for (i = 0; i < PTBL_PAGES; i++) { pa = pte_vatopa(mmu, kernel_pmap, (vm_offset_t)ptbl + (i * PAGE_SIZE)); m = PHYS_TO_VM_PAGE(pa); m->ref_count--; } /* * Free ptbl pages if there are no pte etries in this ptbl. * ref_count has the same value for all ptbl pages, so check the last * page. */ if (m->ref_count == 0) { ptbl_free(mmu, pmap, pdir_idx); //debugf("ptbl_unhold: e (freed ptbl)\n"); return (1); } return (0); } /* * Increment hold count for ptbl pages. This routine is used when a new pte * entry is being inserted into the ptbl. */ static void ptbl_hold(mmu_t mmu, pmap_t pmap, unsigned int pdir_idx) { vm_paddr_t pa; pte_t *ptbl; vm_page_t m; int i; CTR3(KTR_PMAP, "%s: pmap = %p pdir_idx = %d", __func__, pmap, pdir_idx); KASSERT((pdir_idx <= (VM_MAXUSER_ADDRESS / PDIR_SIZE)), ("ptbl_hold: invalid pdir_idx")); KASSERT((pmap != kernel_pmap), ("ptbl_hold: holding kernel ptbl!")); ptbl = pmap->pm_pdir[pdir_idx]; KASSERT((ptbl != NULL), ("ptbl_hold: null ptbl")); for (i = 0; i < PTBL_PAGES; i++) { pa = pte_vatopa(mmu, kernel_pmap, (vm_offset_t)ptbl + (i * PAGE_SIZE)); m = PHYS_TO_VM_PAGE(pa); m->ref_count++; } } /* * Clean pte entry, try to free page table page if requested. * * Return 1 if ptbl pages were freed, otherwise return 0. */ static int pte_remove(mmu_t mmu, pmap_t pmap, vm_offset_t va, uint8_t flags) { unsigned int pdir_idx = PDIR_IDX(va); unsigned int ptbl_idx = PTBL_IDX(va); vm_page_t m; pte_t *ptbl; pte_t *pte; //int su = (pmap == kernel_pmap); //debugf("pte_remove: s (su = %d pmap = 0x%08x va = 0x%08x flags = %d)\n", // su, (u_int32_t)pmap, va, flags); ptbl = pmap->pm_pdir[pdir_idx]; KASSERT(ptbl, ("pte_remove: null ptbl")); pte = &ptbl[ptbl_idx]; if (pte == NULL || !PTE_ISVALID(pte)) return (0); if (PTE_ISWIRED(pte)) pmap->pm_stats.wired_count--; /* Get vm_page_t for mapped pte. */ m = PHYS_TO_VM_PAGE(PTE_PA(pte)); /* Handle managed entry. */ if (PTE_ISMANAGED(pte)) { if (PTE_ISMODIFIED(pte)) vm_page_dirty(m); if (PTE_ISREFERENCED(pte)) vm_page_aflag_set(m, PGA_REFERENCED); pv_remove(pmap, va, m); } else if (pmap == kernel_pmap && m && m->md.pv_tracked) { /* * Always pv_insert()/pv_remove() on MPC85XX, in case DPAA is * used. This is needed by the NCSW support code for fast * VA<->PA translation. */ pv_remove(pmap, va, m); if (TAILQ_EMPTY(&m->md.pv_list)) m->md.pv_tracked = false; } mtx_lock_spin(&tlbivax_mutex); tlb_miss_lock(); tlb0_flush_entry(va); *pte = 0; tlb_miss_unlock(); mtx_unlock_spin(&tlbivax_mutex); pmap->pm_stats.resident_count--; if (flags & PTBL_UNHOLD) { //debugf("pte_remove: e (unhold)\n"); return (ptbl_unhold(mmu, pmap, pdir_idx)); } //debugf("pte_remove: e\n"); return (0); } /* * Insert PTE for a given page and virtual address. */ static int pte_enter(mmu_t mmu, pmap_t pmap, vm_page_t m, vm_offset_t va, uint32_t flags, boolean_t nosleep) { unsigned int pdir_idx = PDIR_IDX(va); unsigned int ptbl_idx = PTBL_IDX(va); pte_t *ptbl, *pte, pte_tmp; CTR4(KTR_PMAP, "%s: su = %d pmap = %p va = %p", __func__, pmap == kernel_pmap, pmap, va); /* Get the page table pointer. */ ptbl = pmap->pm_pdir[pdir_idx]; if (ptbl == NULL) { /* Allocate page table pages. */ ptbl = ptbl_alloc(mmu, pmap, pdir_idx, nosleep); if (ptbl == NULL) { KASSERT(nosleep, ("nosleep and NULL ptbl")); return (ENOMEM); } pmap->pm_pdir[pdir_idx] = ptbl; pte = &ptbl[ptbl_idx]; } else { /* * Check if there is valid mapping for requested * va, if there is, remove it. */ pte = &pmap->pm_pdir[pdir_idx][ptbl_idx]; if (PTE_ISVALID(pte)) { pte_remove(mmu, pmap, va, PTBL_HOLD); } else { /* * pte is not used, increment hold count * for ptbl pages. */ if (pmap != kernel_pmap) ptbl_hold(mmu, pmap, pdir_idx); } } /* * Insert pv_entry into pv_list for mapped page if part of managed * memory. */ if ((m->oflags & VPO_UNMANAGED) == 0) { flags |= PTE_MANAGED; /* Create and insert pv entry. */ pv_insert(pmap, va, m); } pmap->pm_stats.resident_count++; pte_tmp = PTE_RPN_FROM_PA(VM_PAGE_TO_PHYS(m)); pte_tmp |= (PTE_VALID | flags | PTE_PS_4KB); /* 4KB pages only */ mtx_lock_spin(&tlbivax_mutex); tlb_miss_lock(); tlb0_flush_entry(va); *pte = pte_tmp; tlb_miss_unlock(); mtx_unlock_spin(&tlbivax_mutex); return (0); } /* Return the pa for the given pmap/va. */ static vm_paddr_t pte_vatopa(mmu_t mmu, pmap_t pmap, vm_offset_t va) { vm_paddr_t pa = 0; pte_t *pte; pte = pte_find(mmu, pmap, va); if ((pte != NULL) && PTE_ISVALID(pte)) pa = (PTE_PA(pte) | (va & PTE_PA_MASK)); return (pa); } /* Get a pointer to a PTE in a page table. */ static pte_t * pte_find(mmu_t mmu, pmap_t pmap, vm_offset_t va) { unsigned int pdir_idx = PDIR_IDX(va); unsigned int ptbl_idx = PTBL_IDX(va); KASSERT((pmap != NULL), ("pte_find: invalid pmap")); if (pmap->pm_pdir[pdir_idx]) return (&(pmap->pm_pdir[pdir_idx][ptbl_idx])); return (NULL); } +/* Get a pointer to a PTE in a page table, or the next closest (greater) one. */ +static __inline pte_t * +pte_find_next(mmu_t mmu, pmap_t pmap, vm_offset_t *pva) +{ + vm_offset_t va; + pte_t **pdir; + pte_t *pte; + unsigned long i, j; + + KASSERT((pmap != NULL), ("pte_find: invalid pmap")); + + va = *pva; + i = PDIR_IDX(va); + j = PTBL_IDX(va); + pdir = pmap->pm_pdir; + for (; i < PDIR_NENTRIES; i++, j = 0) { + if (pdir[i] == NULL) + continue; + for (; j < PTBL_NENTRIES; j++) { + pte = &pdir[i][j]; + if (!PTE_ISVALID(pte)) + continue; + *pva = PDIR_SIZE * i + PAGE_SIZE * j; + return (pte); + } + } + return (NULL); +} + /* Set up kernel page tables. */ static void kernel_pte_alloc(vm_offset_t data_end, vm_offset_t addr) { pte_t *pte; vm_offset_t va; vm_offset_t pdir_start; int i; kptbl_min = VM_MIN_KERNEL_ADDRESS / PDIR_SIZE; kernel_pmap->pm_pdir = (pte_t **)kernel_ptbl_root; pdir_start = kernel_ptbl_root + PDIR_NENTRIES * sizeof(pte_t); /* Initialize kernel pdir */ for (i = 0; i < kernel_ptbls; i++) { kernel_pmap->pm_pdir[kptbl_min + i] = (pte_t *)(pdir_start + (i * PAGE_SIZE * PTBL_PAGES)); } /* * Fill in PTEs covering kernel code and data. They are not required * for address translation, as this area is covered by static TLB1 * entries, but for pte_vatopa() to work correctly with kernel area * addresses. */ for (va = addr; va < data_end; va += PAGE_SIZE) { pte = &(kernel_pmap->pm_pdir[PDIR_IDX(va)][PTBL_IDX(va)]); powerpc_sync(); *pte = PTE_RPN_FROM_PA(kernload + (va - kernstart)); *pte |= PTE_M | PTE_SR | PTE_SW | PTE_SX | PTE_WIRED | PTE_VALID | PTE_PS_4KB; } } static vm_offset_t mmu_booke_alloc_kernel_pgtables(vm_offset_t data_end) { /* Allocate space for ptbl_bufs. */ ptbl_bufs = (struct ptbl_buf *)data_end; data_end += sizeof(struct ptbl_buf) * PTBL_BUFS; debugf(" ptbl_bufs at 0x%"PRI0ptrX" end = 0x%"PRI0ptrX"\n", (uintptr_t)ptbl_bufs, data_end); data_end = round_page(data_end); kernel_ptbl_root = data_end; data_end += PDIR_NENTRIES * sizeof(pte_t*); /* Allocate PTE tables for kernel KVA. */ kernel_ptbls = howmany(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS, PDIR_SIZE); data_end += kernel_ptbls * PTBL_PAGES * PAGE_SIZE; debugf(" kernel ptbls: %d\n", kernel_ptbls); debugf(" kernel pdir at %#jx end = %#jx\n", (uintmax_t)kernel_ptbl_root, (uintmax_t)data_end); return (data_end); } /* * Initialize a preallocated and zeroed pmap structure, * such as one in a vmspace structure. */ static void mmu_booke_pinit(mmu_t mmu, pmap_t pmap) { int i; CTR4(KTR_PMAP, "%s: pmap = %p, proc %d '%s'", __func__, pmap, curthread->td_proc->p_pid, curthread->td_proc->p_comm); KASSERT((pmap != kernel_pmap), ("pmap_pinit: initializing kernel_pmap")); for (i = 0; i < MAXCPU; i++) pmap->pm_tid[i] = TID_NONE; CPU_ZERO(&kernel_pmap->pm_active); bzero(&pmap->pm_stats, sizeof(pmap->pm_stats)); pmap->pm_pdir = uma_zalloc(ptbl_root_zone, M_WAITOK); bzero(pmap->pm_pdir, sizeof(pte_t *) * PDIR_NENTRIES); TAILQ_INIT(&pmap->pm_ptbl_list); } /* * Release any resources held by the given physical map. * Called when a pmap initialized by mmu_booke_pinit is being released. * Should only be called if the map contains no valid mappings. */ static void mmu_booke_release(mmu_t mmu, pmap_t pmap) { KASSERT(pmap->pm_stats.resident_count == 0, ("pmap_release: pmap resident count %ld != 0", pmap->pm_stats.resident_count)); uma_zfree(ptbl_root_zone, pmap->pm_pdir); } static void mmu_booke_sync_icache(mmu_t mmu, pmap_t pm, vm_offset_t va, vm_size_t sz) { pte_t *pte; vm_paddr_t pa = 0; int sync_sz, valid; pmap_t pmap; vm_page_t m; vm_offset_t addr; int active; rw_wlock(&pvh_global_lock); pmap = PCPU_GET(curpmap); active = (pm == kernel_pmap || pm == pmap) ? 1 : 0; while (sz > 0) { PMAP_LOCK(pm); pte = pte_find(mmu, pm, va); valid = (pte != NULL && PTE_ISVALID(pte)) ? 1 : 0; if (valid) pa = PTE_PA(pte); PMAP_UNLOCK(pm); sync_sz = PAGE_SIZE - (va & PAGE_MASK); sync_sz = min(sync_sz, sz); if (valid) { if (!active) { /* Create a mapping in the active pmap. */ addr = 0; m = PHYS_TO_VM_PAGE(pa); PMAP_LOCK(pmap); pte_enter(mmu, pmap, m, addr, PTE_SR | PTE_VALID, FALSE); addr += (va & PAGE_MASK); __syncicache((void *)addr, sync_sz); pte_remove(mmu, pmap, addr, PTBL_UNHOLD); PMAP_UNLOCK(pmap); } else __syncicache((void *)va, sync_sz); } va += sync_sz; sz -= sync_sz; } rw_wunlock(&pvh_global_lock); } /* * mmu_booke_zero_page_area zeros the specified hardware page by * mapping it into virtual memory and using bzero to clear * its contents. * * off and size must reside within a single page. */ static void mmu_booke_zero_page_area(mmu_t mmu, vm_page_t m, int off, int size) { vm_offset_t va; /* XXX KASSERT off and size are within a single page? */ mtx_lock(&zero_page_mutex); va = zero_page_va; mmu_booke_kenter(mmu, va, VM_PAGE_TO_PHYS(m)); bzero((caddr_t)va + off, size); mmu_booke_kremove(mmu, va); mtx_unlock(&zero_page_mutex); } /* * mmu_booke_zero_page zeros the specified hardware page. */ static void mmu_booke_zero_page(mmu_t mmu, vm_page_t m) { vm_offset_t off, va; va = zero_page_va; mtx_lock(&zero_page_mutex); mmu_booke_kenter(mmu, va, VM_PAGE_TO_PHYS(m)); for (off = 0; off < PAGE_SIZE; off += cacheline_size) __asm __volatile("dcbz 0,%0" :: "r"(va + off)); mmu_booke_kremove(mmu, va); mtx_unlock(&zero_page_mutex); } /* * mmu_booke_copy_page copies the specified (machine independent) page by * mapping the page into virtual memory and using memcopy to copy the page, * one machine dependent page at a time. */ static void mmu_booke_copy_page(mmu_t mmu, vm_page_t sm, vm_page_t dm) { vm_offset_t sva, dva; sva = copy_page_src_va; dva = copy_page_dst_va; mtx_lock(©_page_mutex); mmu_booke_kenter(mmu, sva, VM_PAGE_TO_PHYS(sm)); mmu_booke_kenter(mmu, dva, VM_PAGE_TO_PHYS(dm)); memcpy((caddr_t)dva, (caddr_t)sva, PAGE_SIZE); mmu_booke_kremove(mmu, dva); mmu_booke_kremove(mmu, sva); mtx_unlock(©_page_mutex); } static inline void mmu_booke_copy_pages(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset, vm_page_t *mb, vm_offset_t b_offset, int xfersize) { void *a_cp, *b_cp; vm_offset_t a_pg_offset, b_pg_offset; int cnt; mtx_lock(©_page_mutex); while (xfersize > 0) { a_pg_offset = a_offset & PAGE_MASK; cnt = min(xfersize, PAGE_SIZE - a_pg_offset); mmu_booke_kenter(mmu, copy_page_src_va, VM_PAGE_TO_PHYS(ma[a_offset >> PAGE_SHIFT])); a_cp = (char *)copy_page_src_va + a_pg_offset; b_pg_offset = b_offset & PAGE_MASK; cnt = min(cnt, PAGE_SIZE - b_pg_offset); mmu_booke_kenter(mmu, copy_page_dst_va, VM_PAGE_TO_PHYS(mb[b_offset >> PAGE_SHIFT])); b_cp = (char *)copy_page_dst_va + b_pg_offset; bcopy(a_cp, b_cp, cnt); mmu_booke_kremove(mmu, copy_page_dst_va); mmu_booke_kremove(mmu, copy_page_src_va); a_offset += cnt; b_offset += cnt; xfersize -= cnt; } mtx_unlock(©_page_mutex); } static vm_offset_t mmu_booke_quick_enter_page(mmu_t mmu, vm_page_t m) { vm_paddr_t paddr; vm_offset_t qaddr; uint32_t flags; pte_t *pte; paddr = VM_PAGE_TO_PHYS(m); flags = PTE_SR | PTE_SW | PTE_SX | PTE_WIRED | PTE_VALID; flags |= tlb_calc_wimg(paddr, pmap_page_get_memattr(m)) << PTE_MAS2_SHIFT; flags |= PTE_PS_4KB; critical_enter(); qaddr = PCPU_GET(qmap_addr); pte = pte_find(mmu, kernel_pmap, qaddr); KASSERT(*pte == 0, ("mmu_booke_quick_enter_page: PTE busy")); /* * XXX: tlbivax is broadcast to other cores, but qaddr should * not be present in other TLBs. Is there a better instruction * sequence to use? Or just forget it & use mmu_booke_kenter()... */ __asm __volatile("tlbivax 0, %0" :: "r"(qaddr & MAS2_EPN_MASK)); __asm __volatile("isync; msync"); *pte = PTE_RPN_FROM_PA(paddr) | flags; /* Flush the real memory from the instruction cache. */ if ((flags & (PTE_I | PTE_G)) == 0) __syncicache((void *)qaddr, PAGE_SIZE); return (qaddr); } static void mmu_booke_quick_remove_page(mmu_t mmu, vm_offset_t addr) { pte_t *pte; pte = pte_find(mmu, kernel_pmap, addr); KASSERT(PCPU_GET(qmap_addr) == addr, ("mmu_booke_quick_remove_page: invalid address")); KASSERT(*pte != 0, ("mmu_booke_quick_remove_page: PTE not in use")); *pte = 0; critical_exit(); } /**************************************************************************/ /* TID handling */ /**************************************************************************/ /* * Return the largest uint value log such that 2^log <= num. */ static unsigned long ilog2(unsigned long num) { long lz; __asm ("cntlzw %0, %1" : "=r" (lz) : "r" (num)); return (31 - lz); } /* * Invalidate all TLB0 entries which match the given TID. Note this is * dedicated for cases when invalidations should NOT be propagated to other * CPUs. */ static void tid_flush(tlbtid_t tid) { register_t msr; uint32_t mas0, mas1, mas2; int entry, way; /* Don't evict kernel translations */ if (tid == TID_KERNEL) return; msr = mfmsr(); __asm __volatile("wrteei 0"); /* * Newer (e500mc and later) have tlbilx, which doesn't broadcast, so use * it for PID invalidation. */ switch ((mfpvr() >> 16) & 0xffff) { case FSL_E500mc: case FSL_E5500: case FSL_E6500: mtspr(SPR_MAS6, tid << MAS6_SPID0_SHIFT); /* tlbilxpid */ __asm __volatile("isync; .long 0x7c200024; isync; msync"); __asm __volatile("wrtee %0" :: "r"(msr)); return; } for (way = 0; way < TLB0_WAYS; way++) for (entry = 0; entry < TLB0_ENTRIES_PER_WAY; entry++) { mas0 = MAS0_TLBSEL(0) | MAS0_ESEL(way); mtspr(SPR_MAS0, mas0); mas2 = entry << MAS2_TLB0_ENTRY_IDX_SHIFT; mtspr(SPR_MAS2, mas2); __asm __volatile("isync; tlbre"); mas1 = mfspr(SPR_MAS1); if (!(mas1 & MAS1_VALID)) continue; if (((mas1 & MAS1_TID_MASK) >> MAS1_TID_SHIFT) != tid) continue; mas1 &= ~MAS1_VALID; mtspr(SPR_MAS1, mas1); __asm __volatile("isync; tlbwe; isync; msync"); } __asm __volatile("wrtee %0" :: "r"(msr)); } Index: head/sys/powerpc/booke/pmap_64.c =================================================================== --- head/sys/powerpc/booke/pmap_64.c (revision 359791) +++ head/sys/powerpc/booke/pmap_64.c (revision 359792) @@ -1,741 +1,786 @@ /*- * SPDX-License-Identifier: BSD-2-Clause-FreeBSD * * Copyright (C) 2020 Justin Hibbits * Copyright (C) 2007-2009 Semihalf, Rafal Jaworowski * Copyright (C) 2006 Semihalf, Marian Balakowicz * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * Some hw specific parts of this pmap were derived or influenced * by NetBSD's ibm4xx pmap module. More generic code is shared with * a few other pmap modules from the FreeBSD tree. */ /* * VM layout notes: * * Kernel and user threads run within one common virtual address space * defined by AS=0. * * 64-bit pmap: * Virtual address space layout: * ----------------------------- * 0x0000_0000_0000_0000 - 0x3fff_ffff_ffff_ffff : user process * 0x4000_0000_0000_0000 - 0x7fff_ffff_ffff_ffff : unused * 0x8000_0000_0000_0000 - 0xbfff_ffff_ffff_ffff : mmio region * 0xc000_0000_0000_0000 - 0xdfff_ffff_ffff_ffff : direct map * 0xe000_0000_0000_0000 - 0xffff_ffff_ffff_ffff : KVA */ #include __FBSDID("$FreeBSD$"); #include "opt_ddb.h" #include "opt_kstack_pages.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "mmu_if.h" #ifdef DEBUG #define debugf(fmt, args...) printf(fmt, ##args) #else #define debugf(fmt, args...) #endif #define PRI0ptrX "016lx" /**************************************************************************/ /* PMAP */ /**************************************************************************/ unsigned int kernel_pdirs; static uma_zone_t ptbl_root_zone; static pte_t ****kernel_ptbl_root; /* * Base of the pmap_mapdev() region. On 32-bit it immediately follows the * userspace address range. On On 64-bit it's far above, at (1 << 63), and * ranges up to the DMAP, giving 62 bits of PA allowed. This is far larger than * the widest Book-E address bus, the e6500 has a 40-bit PA space. This allows * us to map akin to the DMAP, with addresses identical to the PA, offset by the * base. */ #define VM_MAPDEV_BASE 0x8000000000000000 #define VM_MAPDEV_PA_MAX 0x4000000000000000 /* Don't encroach on DMAP */ static void tid_flush(tlbtid_t tid); static unsigned long ilog2(unsigned long); /**************************************************************************/ /* Page table management */ /**************************************************************************/ #define PMAP_ROOT_SIZE (sizeof(pte_t****) * PG_ROOT_NENTRIES) static pte_t *ptbl_alloc(mmu_t mmu, pmap_t pmap, vm_offset_t va, bool nosleep, bool *is_new); static void ptbl_hold(mmu_t, pmap_t, pte_t *); static int ptbl_unhold(mmu_t, pmap_t, vm_offset_t); static vm_paddr_t pte_vatopa(mmu_t, pmap_t, vm_offset_t); static int pte_enter(mmu_t, pmap_t, vm_page_t, vm_offset_t, uint32_t, boolean_t); static int pte_remove(mmu_t, pmap_t, vm_offset_t, uint8_t); static pte_t *pte_find(mmu_t, pmap_t, vm_offset_t); +static pte_t *pte_find_next(mmu_t, pmap_t, vm_offset_t *); static void kernel_pte_alloc(vm_offset_t, vm_offset_t); /**************************************************************************/ /* Page table related */ /**************************************************************************/ /* Allocate a page, to be used in a page table. */ static vm_offset_t mmu_booke_alloc_page(mmu_t mmu, pmap_t pmap, unsigned int idx, bool nosleep) { vm_page_t m; int req; req = VM_ALLOC_NOOBJ | VM_ALLOC_WIRED | VM_ALLOC_ZERO; while ((m = vm_page_alloc(NULL, idx, req)) == NULL) { if (nosleep) return (0); PMAP_UNLOCK(pmap); rw_wunlock(&pvh_global_lock); vm_wait(NULL); rw_wlock(&pvh_global_lock); PMAP_LOCK(pmap); } if (!(m->flags & PG_ZERO)) /* Zero whole ptbl. */ mmu_booke_zero_page(mmu, m); return (PHYS_TO_DMAP(VM_PAGE_TO_PHYS(m))); } /* Initialize pool of kva ptbl buffers. */ static void ptbl_init(void) { } /* Get a pointer to a PTE in a page table. */ static __inline pte_t * pte_find(mmu_t mmu, pmap_t pmap, vm_offset_t va) { pte_t ***pdir_l1; pte_t **pdir; pte_t *ptbl; KASSERT((pmap != NULL), ("pte_find: invalid pmap")); pdir_l1 = pmap->pm_root[PG_ROOT_IDX(va)]; if (pdir_l1 == NULL) return (NULL); pdir = pdir_l1[PDIR_L1_IDX(va)]; if (pdir == NULL) return (NULL); ptbl = pdir[PDIR_IDX(va)]; return ((ptbl != NULL) ? &ptbl[PTBL_IDX(va)] : NULL); +} + +/* Get a pointer to a PTE in a page table, or the next closest (greater) one. */ +static __inline pte_t * +pte_find_next(mmu_t mmu, pmap_t pmap, vm_offset_t *pva) +{ + vm_offset_t va; + pte_t ****pm_root; + pte_t *pte; + unsigned long i, j, k, l; + + KASSERT((pmap != NULL), ("pte_find: invalid pmap")); + + va = *pva; + i = PG_ROOT_IDX(va); + j = PDIR_L1_IDX(va); + k = PDIR_IDX(va); + l = PTBL_IDX(va); + pm_root = pmap->pm_root; + /* truncate the VA for later. */ + va &= ~((1UL << (PG_ROOT_H + 1)) - 1); + for (; i < PG_ROOT_NENTRIES; i++, j = 0) { + if (pm_root[i] == 0) + continue; + for (; j < PDIR_L1_NENTRIES; j++, k = 0) { + if (pm_root[i][j] == 0) + continue; + for (; k < PDIR_NENTRIES; k++, l = 0) { + if (pm_root[i][j][k] == NULL) + continue; + for (; l < PTBL_NENTRIES; l++) { + pte = &pm_root[i][j][k][l]; + if (!PTE_ISVALID(pte)) + continue; + *pva = va + PG_ROOT_SIZE * i + + PDIR_L1_SIZE * j + + PDIR_SIZE * k + + PAGE_SIZE * l; + return (pte); + } + } + } + } + return (NULL); } static bool unhold_free_page(mmu_t mmu, pmap_t pmap, vm_page_t m) { m->ref_count--; if (m->ref_count == 0) { vm_wire_sub(1); vm_page_free_zero(m); return (true); } return (false); } static vm_offset_t alloc_or_hold_page(mmu_t mmu, pmap_t pmap, vm_offset_t *ptr_tbl, uint32_t index, bool nosleep, bool hold, bool *isnew) { vm_offset_t page; vm_page_t m; page = ptr_tbl[index]; KASSERT(page != 0 || pmap != kernel_pmap, ("NULL page table page found in kernel pmap!")); if (page == 0) { page = mmu_booke_alloc_page(mmu, pmap, index, nosleep); if (ptr_tbl[index] == 0) { *isnew = true; ptr_tbl[index] = page; return (page); } m = PHYS_TO_VM_PAGE(DMAP_TO_PHYS(page)); page = ptr_tbl[index]; vm_wire_sub(1); vm_page_free_zero(m); } if (hold) { m = PHYS_TO_VM_PAGE(pmap_kextract(page)); m->ref_count++; } *isnew = false; return (page); } /* Allocate page table. */ static pte_t* ptbl_alloc(mmu_t mmu, pmap_t pmap, vm_offset_t va, bool nosleep, bool *is_new) { unsigned int pg_root_idx = PG_ROOT_IDX(va); unsigned int pdir_l1_idx = PDIR_L1_IDX(va); unsigned int pdir_idx = PDIR_IDX(va); vm_offset_t pdir_l1, pdir, ptbl; bool hold_page; hold_page = (pmap != kernel_pmap); pdir_l1 = alloc_or_hold_page(mmu, pmap, (vm_offset_t *)pmap->pm_root, pg_root_idx, nosleep, hold_page, is_new); if (pdir_l1 == 0) return (NULL); pdir = alloc_or_hold_page(mmu, pmap, (vm_offset_t *)pdir_l1, pdir_l1_idx, nosleep, hold_page, is_new); if (pdir == 0) return (NULL); ptbl = alloc_or_hold_page(mmu, pmap, (vm_offset_t *)pdir, pdir_idx, nosleep, false, is_new); return ((pte_t *)ptbl); } /* * Decrement ptbl pages hold count and attempt to free ptbl pages. Called * when removing pte entry from ptbl. * * Return 1 if ptbl pages were freed. */ static int ptbl_unhold(mmu_t mmu, pmap_t pmap, vm_offset_t va) { pte_t *ptbl; vm_page_t m; u_int pg_root_idx; pte_t ***pdir_l1; u_int pdir_l1_idx; pte_t **pdir; u_int pdir_idx; pg_root_idx = PG_ROOT_IDX(va); pdir_l1_idx = PDIR_L1_IDX(va); pdir_idx = PDIR_IDX(va); KASSERT((pmap != kernel_pmap), ("ptbl_unhold: unholding kernel ptbl!")); pdir_l1 = pmap->pm_root[pg_root_idx]; pdir = pdir_l1[pdir_l1_idx]; ptbl = pdir[pdir_idx]; /* decrement hold count */ m = PHYS_TO_VM_PAGE(DMAP_TO_PHYS((vm_offset_t) ptbl)); if (!unhold_free_page(mmu, pmap, m)) return (0); pdir[pdir_idx] = NULL; m = PHYS_TO_VM_PAGE(DMAP_TO_PHYS((vm_offset_t) pdir)); if (!unhold_free_page(mmu, pmap, m)) return (1); pdir_l1[pdir_l1_idx] = NULL; m = PHYS_TO_VM_PAGE(DMAP_TO_PHYS((vm_offset_t) pdir_l1)); if (!unhold_free_page(mmu, pmap, m)) return (1); pmap->pm_root[pg_root_idx] = NULL; return (1); } /* * Increment hold count for ptbl pages. This routine is used when new pte * entry is being inserted into ptbl. */ static void ptbl_hold(mmu_t mmu, pmap_t pmap, pte_t *ptbl) { vm_page_t m; KASSERT((pmap != kernel_pmap), ("ptbl_hold: holding kernel ptbl!")); m = PHYS_TO_VM_PAGE(DMAP_TO_PHYS((vm_offset_t) ptbl)); m->ref_count++; } /* * Clean pte entry, try to free page table page if requested. * * Return 1 if ptbl pages were freed, otherwise return 0. */ static int pte_remove(mmu_t mmu, pmap_t pmap, vm_offset_t va, u_int8_t flags) { vm_page_t m; pte_t *pte; pte = pte_find(mmu, pmap, va); KASSERT(pte != NULL, ("%s: NULL pte for va %#jx, pmap %p", __func__, (uintmax_t)va, pmap)); if (!PTE_ISVALID(pte)) return (0); /* Get vm_page_t for mapped pte. */ m = PHYS_TO_VM_PAGE(PTE_PA(pte)); if (PTE_ISWIRED(pte)) pmap->pm_stats.wired_count--; /* Handle managed entry. */ if (PTE_ISMANAGED(pte)) { /* Handle modified pages. */ if (PTE_ISMODIFIED(pte)) vm_page_dirty(m); /* Referenced pages. */ if (PTE_ISREFERENCED(pte)) vm_page_aflag_set(m, PGA_REFERENCED); /* Remove pv_entry from pv_list. */ pv_remove(pmap, va, m); } else if (pmap == kernel_pmap && m && m->md.pv_tracked) { pv_remove(pmap, va, m); if (TAILQ_EMPTY(&m->md.pv_list)) m->md.pv_tracked = false; } mtx_lock_spin(&tlbivax_mutex); tlb_miss_lock(); tlb0_flush_entry(va); *pte = 0; tlb_miss_unlock(); mtx_unlock_spin(&tlbivax_mutex); pmap->pm_stats.resident_count--; if (flags & PTBL_UNHOLD) { return (ptbl_unhold(mmu, pmap, va)); } return (0); } /* * Insert PTE for a given page and virtual address. */ static int pte_enter(mmu_t mmu, pmap_t pmap, vm_page_t m, vm_offset_t va, uint32_t flags, boolean_t nosleep) { unsigned int ptbl_idx = PTBL_IDX(va); pte_t *ptbl, *pte, pte_tmp; bool is_new; /* Get the page directory pointer. */ ptbl = ptbl_alloc(mmu, pmap, va, nosleep, &is_new); if (ptbl == NULL) { KASSERT(nosleep, ("nosleep and NULL ptbl")); return (ENOMEM); } if (is_new) { pte = &ptbl[ptbl_idx]; } else { /* * Check if there is valid mapping for requested va, if there * is, remove it. */ pte = &ptbl[ptbl_idx]; if (PTE_ISVALID(pte)) { pte_remove(mmu, pmap, va, PTBL_HOLD); } else { /* * pte is not used, increment hold count for ptbl * pages. */ if (pmap != kernel_pmap) ptbl_hold(mmu, pmap, ptbl); } } /* * Insert pv_entry into pv_list for mapped page if part of managed * memory. */ if ((m->oflags & VPO_UNMANAGED) == 0) { flags |= PTE_MANAGED; /* Create and insert pv entry. */ pv_insert(pmap, va, m); } pmap->pm_stats.resident_count++; pte_tmp = PTE_RPN_FROM_PA(VM_PAGE_TO_PHYS(m)); pte_tmp |= (PTE_VALID | flags); mtx_lock_spin(&tlbivax_mutex); tlb_miss_lock(); tlb0_flush_entry(va); *pte = pte_tmp; tlb_miss_unlock(); mtx_unlock_spin(&tlbivax_mutex); return (0); } /* Return the pa for the given pmap/va. */ static vm_paddr_t pte_vatopa(mmu_t mmu, pmap_t pmap, vm_offset_t va) { vm_paddr_t pa = 0; pte_t *pte; pte = pte_find(mmu, pmap, va); if ((pte != NULL) && PTE_ISVALID(pte)) pa = (PTE_PA(pte) | (va & PTE_PA_MASK)); return (pa); } /* allocate pte entries to manage (addr & mask) to (addr & mask) + size */ static void kernel_pte_alloc(vm_offset_t data_end, vm_offset_t addr) { pte_t *pte; vm_size_t kva_size; int kernel_pdirs, kernel_pgtbls, pdir_l1s; vm_offset_t va, l1_va, pdir_va, ptbl_va; int i, j, k; kva_size = VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS; kernel_pmap->pm_root = kernel_ptbl_root; pdir_l1s = howmany(kva_size, PG_ROOT_SIZE); kernel_pdirs = howmany(kva_size, PDIR_L1_SIZE); kernel_pgtbls = howmany(kva_size, PDIR_SIZE); /* Initialize kernel pdir */ l1_va = (vm_offset_t)kernel_ptbl_root + round_page(PG_ROOT_NENTRIES * sizeof(pte_t ***)); pdir_va = l1_va + pdir_l1s * PAGE_SIZE; ptbl_va = pdir_va + kernel_pdirs * PAGE_SIZE; if (bootverbose) { printf("ptbl_root_va: %#lx\n", (vm_offset_t)kernel_ptbl_root); printf("l1_va: %#lx (%d entries)\n", l1_va, pdir_l1s); printf("pdir_va: %#lx(%d entries)\n", pdir_va, kernel_pdirs); printf("ptbl_va: %#lx(%d entries)\n", ptbl_va, kernel_pgtbls); } va = VM_MIN_KERNEL_ADDRESS; for (i = 0; i < pdir_l1s; i++, l1_va += PAGE_SIZE) { kernel_pmap->pm_root[i] = (pte_t ***)l1_va; for (j = 0; j < PDIR_L1_NENTRIES && va < VM_MAX_KERNEL_ADDRESS; j++, pdir_va += PAGE_SIZE) { kernel_pmap->pm_root[i][j] = (pte_t **)pdir_va; for (k = 0; k < PDIR_NENTRIES && va < VM_MAX_KERNEL_ADDRESS; k++, va += PDIR_SIZE, ptbl_va += PAGE_SIZE) kernel_pmap->pm_root[i][j][k] = (pte_t *)ptbl_va; } } /* * Fill in PTEs covering kernel code and data. They are not required * for address translation, as this area is covered by static TLB1 * entries, but for pte_vatopa() to work correctly with kernel area * addresses. */ for (va = addr; va < data_end; va += PAGE_SIZE) { pte = &(kernel_pmap->pm_root[PG_ROOT_IDX(va)][PDIR_L1_IDX(va)][PDIR_IDX(va)][PTBL_IDX(va)]); *pte = PTE_RPN_FROM_PA(kernload + (va - kernstart)); *pte |= PTE_M | PTE_SR | PTE_SW | PTE_SX | PTE_WIRED | PTE_VALID | PTE_PS_4KB; } } static vm_offset_t mmu_booke_alloc_kernel_pgtables(vm_offset_t data_end) { vm_size_t kva_size = VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS; kernel_ptbl_root = (pte_t ****)data_end; data_end += round_page(PG_ROOT_NENTRIES * sizeof(pte_t ***)); data_end += howmany(kva_size, PG_ROOT_SIZE) * PAGE_SIZE; data_end += howmany(kva_size, PDIR_L1_SIZE) * PAGE_SIZE; data_end += howmany(kva_size, PDIR_SIZE) * PAGE_SIZE; return (data_end); } /* * Initialize a preallocated and zeroed pmap structure, * such as one in a vmspace structure. */ static void mmu_booke_pinit(mmu_t mmu, pmap_t pmap) { int i; CTR4(KTR_PMAP, "%s: pmap = %p, proc %d '%s'", __func__, pmap, curthread->td_proc->p_pid, curthread->td_proc->p_comm); KASSERT((pmap != kernel_pmap), ("pmap_pinit: initializing kernel_pmap")); for (i = 0; i < MAXCPU; i++) pmap->pm_tid[i] = TID_NONE; CPU_ZERO(&kernel_pmap->pm_active); bzero(&pmap->pm_stats, sizeof(pmap->pm_stats)); pmap->pm_root = uma_zalloc(ptbl_root_zone, M_WAITOK); bzero(pmap->pm_root, sizeof(pte_t **) * PG_ROOT_NENTRIES); } /* * Release any resources held by the given physical map. * Called when a pmap initialized by mmu_booke_pinit is being released. * Should only be called if the map contains no valid mappings. */ static void mmu_booke_release(mmu_t mmu, pmap_t pmap) { KASSERT(pmap->pm_stats.resident_count == 0, ("pmap_release: pmap resident count %ld != 0", pmap->pm_stats.resident_count)); uma_zfree(ptbl_root_zone, pmap->pm_root); } static void mmu_booke_sync_icache(mmu_t mmu, pmap_t pm, vm_offset_t va, vm_size_t sz) { pte_t *pte; vm_paddr_t pa = 0; int sync_sz, valid; while (sz > 0) { PMAP_LOCK(pm); pte = pte_find(mmu, pm, va); valid = (pte != NULL && PTE_ISVALID(pte)) ? 1 : 0; if (valid) pa = PTE_PA(pte); PMAP_UNLOCK(pm); sync_sz = PAGE_SIZE - (va & PAGE_MASK); sync_sz = min(sync_sz, sz); if (valid) { pa += (va & PAGE_MASK); __syncicache((void *)PHYS_TO_DMAP(pa), sync_sz); } va += sync_sz; sz -= sync_sz; } } /* * mmu_booke_zero_page_area zeros the specified hardware page by * mapping it into virtual memory and using bzero to clear * its contents. * * off and size must reside within a single page. */ static void mmu_booke_zero_page_area(mmu_t mmu, vm_page_t m, int off, int size) { vm_offset_t va; /* XXX KASSERT off and size are within a single page? */ va = PHYS_TO_DMAP(VM_PAGE_TO_PHYS(m)); bzero((caddr_t)va + off, size); } /* * mmu_booke_zero_page zeros the specified hardware page. */ static void mmu_booke_zero_page(mmu_t mmu, vm_page_t m) { vm_offset_t off, va; va = PHYS_TO_DMAP(VM_PAGE_TO_PHYS(m)); for (off = 0; off < PAGE_SIZE; off += cacheline_size) __asm __volatile("dcbz 0,%0" :: "r"(va + off)); } /* * mmu_booke_copy_page copies the specified (machine independent) page by * mapping the page into virtual memory and using memcopy to copy the page, * one machine dependent page at a time. */ static void mmu_booke_copy_page(mmu_t mmu, vm_page_t sm, vm_page_t dm) { vm_offset_t sva, dva; sva = PHYS_TO_DMAP(VM_PAGE_TO_PHYS(sm)); dva = PHYS_TO_DMAP(VM_PAGE_TO_PHYS(dm)); memcpy((caddr_t)dva, (caddr_t)sva, PAGE_SIZE); } static inline void mmu_booke_copy_pages(mmu_t mmu, vm_page_t *ma, vm_offset_t a_offset, vm_page_t *mb, vm_offset_t b_offset, int xfersize) { void *a_cp, *b_cp; vm_offset_t a_pg_offset, b_pg_offset; int cnt; vm_page_t pa, pb; while (xfersize > 0) { a_pg_offset = a_offset & PAGE_MASK; pa = ma[a_offset >> PAGE_SHIFT]; b_pg_offset = b_offset & PAGE_MASK; pb = mb[b_offset >> PAGE_SHIFT]; cnt = min(xfersize, PAGE_SIZE - a_pg_offset); cnt = min(cnt, PAGE_SIZE - b_pg_offset); a_cp = (caddr_t)((uintptr_t)PHYS_TO_DMAP(VM_PAGE_TO_PHYS(pa)) + a_pg_offset); b_cp = (caddr_t)((uintptr_t)PHYS_TO_DMAP(VM_PAGE_TO_PHYS(pb)) + b_pg_offset); bcopy(a_cp, b_cp, cnt); a_offset += cnt; b_offset += cnt; xfersize -= cnt; } } static vm_offset_t mmu_booke_quick_enter_page(mmu_t mmu, vm_page_t m) { return (PHYS_TO_DMAP(VM_PAGE_TO_PHYS(m))); } static void mmu_booke_quick_remove_page(mmu_t mmu, vm_offset_t addr) { } /**************************************************************************/ /* TID handling */ /**************************************************************************/ /* * Return the largest uint value log such that 2^log <= num. */ static unsigned long ilog2(unsigned long num) { long lz; __asm ("cntlzd %0, %1" : "=r" (lz) : "r" (num)); return (63 - lz); } /* * Invalidate all TLB0 entries which match the given TID. Note this is * dedicated for cases when invalidations should NOT be propagated to other * CPUs. */ static void tid_flush(tlbtid_t tid) { register_t msr; /* Don't evict kernel translations */ if (tid == TID_KERNEL) return; msr = mfmsr(); __asm __volatile("wrteei 0"); /* * Newer (e500mc and later) have tlbilx, which doesn't broadcast, so use * it for PID invalidation. */ mtspr(SPR_MAS6, tid << MAS6_SPID0_SHIFT); __asm __volatile("isync; .long 0x7c200024; isync; msync"); __asm __volatile("wrtee %0" :: "r"(msr)); }