Page MenuHomeFreeBSD
Files F105704234

D12434.diff
No OneTemporary
Actions

D12434.diff
View Options

Index: head/sys/amd64/amd64/efirt.c
===================================================================
--- head/sys/amd64/amd64/efirt.c
+++ head/sys/amd64/amd64/efirt.c
@@ -1,619 +0,0 @@
-/*-
- * Copyright (c) 2004 Marcel Moolenaar
- * Copyright (c) 2001 Doug Rabson
- * Copyright (c) 2016 The FreeBSD Foundation
- * All rights reserved.
- *
- * Portions of this software were developed by Konstantin Belousov
- * under sponsorship from the FreeBSD Foundation.
- *
- * 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
- */
-
-#include <sys/cdefs.h>
-__FBSDID("$FreeBSD$");
-
-#include <sys/param.h>
-#include <sys/efi.h>
-#include <sys/kernel.h>
-#include <sys/linker.h>
-#include <sys/lock.h>
-#include <sys/module.h>
-#include <sys/mutex.h>
-#include <sys/clock.h>
-#include <sys/proc.h>
-#include <sys/rwlock.h>
-#include <sys/sched.h>
-#include <sys/sysctl.h>
-#include <sys/systm.h>
-#include <sys/vmmeter.h>
-#include <isa/rtc.h>
-#include <machine/fpu.h>
-#include <machine/efi.h>
-#include <machine/metadata.h>
-#include <machine/md_var.h>
-#include <machine/smp.h>
-#include <machine/vmparam.h>
-#include <vm/vm.h>
-#include <vm/pmap.h>
-#include <vm/vm_map.h>
-#include <vm/vm_object.h>
-#include <vm/vm_page.h>
-#include <vm/vm_pager.h>
-
-static struct efi_systbl *efi_systbl;
-static struct efi_cfgtbl *efi_cfgtbl;
-static struct efi_rt *efi_runtime;
-
-static int efi_status2err[25] = {
- 0, /* EFI_SUCCESS */
- ENOEXEC, /* EFI_LOAD_ERROR */
- EINVAL, /* EFI_INVALID_PARAMETER */
- ENOSYS, /* EFI_UNSUPPORTED */
- EMSGSIZE, /* EFI_BAD_BUFFER_SIZE */
- EOVERFLOW, /* EFI_BUFFER_TOO_SMALL */
- EBUSY, /* EFI_NOT_READY */
- EIO, /* EFI_DEVICE_ERROR */
- EROFS, /* EFI_WRITE_PROTECTED */
- EAGAIN, /* EFI_OUT_OF_RESOURCES */
- EIO, /* EFI_VOLUME_CORRUPTED */
- ENOSPC, /* EFI_VOLUME_FULL */
- ENXIO, /* EFI_NO_MEDIA */
- ESTALE, /* EFI_MEDIA_CHANGED */
- ENOENT, /* EFI_NOT_FOUND */
- EACCES, /* EFI_ACCESS_DENIED */
- ETIMEDOUT, /* EFI_NO_RESPONSE */
- EADDRNOTAVAIL, /* EFI_NO_MAPPING */
- ETIMEDOUT, /* EFI_TIMEOUT */
- EDOOFUS, /* EFI_NOT_STARTED */
- EALREADY, /* EFI_ALREADY_STARTED */
- ECANCELED, /* EFI_ABORTED */
- EPROTO, /* EFI_ICMP_ERROR */
- EPROTO, /* EFI_TFTP_ERROR */
- EPROTO /* EFI_PROTOCOL_ERROR */
-};
-
-static int
-efi_status_to_errno(efi_status status)
-{
- u_long code;
-
- code = status & 0x3ffffffffffffffful;
- return (code < nitems(efi_status2err) ? efi_status2err[code] : EDOOFUS);
-}
-
-static struct mtx efi_lock;
-static pml4_entry_t *efi_pml4;
-static vm_object_t obj_1t1_pt;
-static vm_page_t efi_pml4_page;
-
-static void
-efi_destroy_1t1_map(void)
-{
- vm_page_t m;
-
- if (obj_1t1_pt != NULL) {
- VM_OBJECT_RLOCK(obj_1t1_pt);
- TAILQ_FOREACH(m, &obj_1t1_pt->memq, listq)
- m->wire_count = 0;
- atomic_subtract_int(&vm_cnt.v_wire_count,
- obj_1t1_pt->resident_page_count);
- VM_OBJECT_RUNLOCK(obj_1t1_pt);
- vm_object_deallocate(obj_1t1_pt);
- }
-
- obj_1t1_pt = NULL;
- efi_pml4 = NULL;
- efi_pml4_page = NULL;
-}
-
-static vm_page_t
-efi_1t1_page(vm_pindex_t idx)
-{
-
- return (vm_page_grab(obj_1t1_pt, idx, VM_ALLOC_NOBUSY |
- VM_ALLOC_WIRED | VM_ALLOC_ZERO));
-}
-
-static pt_entry_t *
-efi_1t1_pte(vm_offset_t va)
-{
- pml4_entry_t *pml4e;
- pdp_entry_t *pdpe;
- pd_entry_t *pde;
- pt_entry_t *pte;
- vm_page_t m;
- vm_pindex_t pml4_idx, pdp_idx, pd_idx;
- vm_paddr_t mphys;
-
- pml4_idx = pmap_pml4e_index(va);
- pml4e = &efi_pml4[pml4_idx];
- if (*pml4e == 0) {
- m = efi_1t1_page(1 + pml4_idx);
- mphys = VM_PAGE_TO_PHYS(m);
- *pml4e = mphys | X86_PG_RW | X86_PG_V;
- } else {
- mphys = *pml4e & ~PAGE_MASK;
- }
-
- pdpe = (pdp_entry_t *)PHYS_TO_DMAP(mphys);
- pdp_idx = pmap_pdpe_index(va);
- pdpe += pdp_idx;
- if (*pdpe == 0) {
- m = efi_1t1_page(1 + NPML4EPG + (pml4_idx + 1) * (pdp_idx + 1));
- mphys = VM_PAGE_TO_PHYS(m);
- *pdpe = mphys | X86_PG_RW | X86_PG_V;
- } else {
- mphys = *pdpe & ~PAGE_MASK;
- }
-
- pde = (pd_entry_t *)PHYS_TO_DMAP(mphys);
- pd_idx = pmap_pde_index(va);
- pde += pd_idx;
- if (*pde == 0) {
- m = efi_1t1_page(1 + NPML4EPG + NPML4EPG * NPDPEPG +
- (pml4_idx + 1) * (pdp_idx + 1) * (pd_idx + 1));
- mphys = VM_PAGE_TO_PHYS(m);
- *pde = mphys | X86_PG_RW | X86_PG_V;
- } else {
- mphys = *pde & ~PAGE_MASK;
- }
-
- pte = (pt_entry_t *)PHYS_TO_DMAP(mphys);
- pte += pmap_pte_index(va);
- KASSERT(*pte == 0, ("va %#jx *pt %#jx", va, *pte));
-
- return (pte);
-}
-
-static bool
-efi_create_1t1_map(struct efi_md *map, int ndesc, int descsz)
-{
- struct efi_md *p;
- pt_entry_t *pte;
- vm_offset_t va;
- uint64_t idx;
- int bits, i, mode;
-
- obj_1t1_pt = vm_pager_allocate(OBJT_PHYS, NULL, ptoa(1 +
- NPML4EPG + NPML4EPG * NPDPEPG + NPML4EPG * NPDPEPG * NPDEPG),
- VM_PROT_ALL, 0, NULL);
- VM_OBJECT_WLOCK(obj_1t1_pt);
- efi_pml4_page = efi_1t1_page(0);
- VM_OBJECT_WUNLOCK(obj_1t1_pt);
- efi_pml4 = (pml4_entry_t *)PHYS_TO_DMAP(VM_PAGE_TO_PHYS(efi_pml4_page));
- pmap_pinit_pml4(efi_pml4_page);
-
- for (i = 0, p = map; i < ndesc; i++, p = efi_next_descriptor(p,
- descsz)) {
- if ((p->md_attr & EFI_MD_ATTR_RT) == 0)
- continue;
- if (p->md_virt != NULL) {
- if (bootverbose)
- printf("EFI Runtime entry %d is mapped\n", i);
- goto fail;
- }
- if ((p->md_phys & EFI_PAGE_MASK) != 0) {
- if (bootverbose)
- printf("EFI Runtime entry %d is not aligned\n",
- i);
- goto fail;
- }
- if (p->md_phys + p->md_pages * EFI_PAGE_SIZE < p->md_phys ||
- p->md_phys + p->md_pages * EFI_PAGE_SIZE >=
- VM_MAXUSER_ADDRESS) {
- printf("EFI Runtime entry %d is not in mappable for RT:"
- "base %#016jx %#jx pages\n",
- i, (uintmax_t)p->md_phys,
- (uintmax_t)p->md_pages);
- goto fail;
- }
- if ((p->md_attr & EFI_MD_ATTR_WB) != 0)
- mode = VM_MEMATTR_WRITE_BACK;
- else if ((p->md_attr & EFI_MD_ATTR_WT) != 0)
- mode = VM_MEMATTR_WRITE_THROUGH;
- else if ((p->md_attr & EFI_MD_ATTR_WC) != 0)
- mode = VM_MEMATTR_WRITE_COMBINING;
- else if ((p->md_attr & EFI_MD_ATTR_WP) != 0)
- mode = VM_MEMATTR_WRITE_PROTECTED;
- else if ((p->md_attr & EFI_MD_ATTR_UC) != 0)
- mode = VM_MEMATTR_UNCACHEABLE;
- else {
- if (bootverbose)
- printf("EFI Runtime entry %d mapping "
- "attributes unsupported\n", i);
- mode = VM_MEMATTR_UNCACHEABLE;
- }
- bits = pmap_cache_bits(kernel_pmap, mode, FALSE) | X86_PG_RW |
- X86_PG_V;
- VM_OBJECT_WLOCK(obj_1t1_pt);
- for (va = p->md_phys, idx = 0; idx < p->md_pages; idx++,
- va += PAGE_SIZE) {
- pte = efi_1t1_pte(va);
- pte_store(pte, va | bits);
- }
- VM_OBJECT_WUNLOCK(obj_1t1_pt);
- }
-
- return (true);
-
-fail:
- efi_destroy_1t1_map();
- return (false);
-}
-
-/*
- * Create an environment for the EFI runtime code call. The most
- * important part is creating the required 1:1 physical->virtual
- * mappings for the runtime segments. To do that, we manually create
- * page table which unmap userspace but gives correct kernel mapping.
- * The 1:1 mappings for runtime segments usually occupy low 4G of the
- * physical address map.
- *
- * The 1:1 mappings were chosen over the SetVirtualAddressMap() EFI RT
- * service, because there are some BIOSes which fail to correctly
- * relocate itself on the call, requiring both 1:1 and virtual
- * mapping. As result, we must provide 1:1 mapping anyway, so no
- * reason to bother with the virtual map, and no need to add a
- * complexity into loader.
- *
- * The fpu_kern_enter() call allows firmware to use FPU, as mandated
- * by the specification. In particular, CR0.TS bit is cleared. Also
- * it enters critical section, giving us neccessary protection against
- * context switch.
- *
- * There is no need to disable interrupts around the change of %cr3,
- * the kernel mappings are correct, while we only grabbed the
- * userspace portion of VA. Interrupts handlers must not access
- * userspace. Having interrupts enabled fixes the issue with
- * firmware/SMM long operation, which would negatively affect IPIs,
- * esp. TLB shootdown requests.
- */
-static int
-efi_enter(void)
-{
- pmap_t curpmap;
- int error;
-
- if (efi_runtime == NULL)
- return (ENXIO);
- curpmap = PCPU_GET(curpmap);
- PMAP_LOCK(curpmap);
- mtx_lock(&efi_lock);
- error = fpu_kern_enter(curthread, NULL, FPU_KERN_NOCTX);
- if (error != 0) {
- PMAP_UNLOCK(curpmap);
- return (error);
- }
-
- /*
- * IPI TLB shootdown handler invltlb_pcid_handler() reloads
- * %cr3 from the curpmap->pm_cr3, which would disable runtime
- * segments mappings. Block the handler's action by setting
- * curpmap to impossible value. See also comment in
- * pmap.c:pmap_activate_sw().
- */
- if (pmap_pcid_enabled && !invpcid_works)
- PCPU_SET(curpmap, NULL);
-
- load_cr3(VM_PAGE_TO_PHYS(efi_pml4_page) | (pmap_pcid_enabled ?
- curpmap->pm_pcids[PCPU_GET(cpuid)].pm_pcid : 0));
- /*
- * If PCID is enabled, the clear CR3_PCID_SAVE bit in the loaded %cr3
- * causes TLB invalidation.
- */
- if (!pmap_pcid_enabled)
- invltlb();
- return (0);
-}
-
-static void
-efi_leave(void)
-{
- pmap_t curpmap;
-
- curpmap = &curproc->p_vmspace->vm_pmap;
- if (pmap_pcid_enabled && !invpcid_works)
- PCPU_SET(curpmap, curpmap);
- load_cr3(curpmap->pm_cr3 | (pmap_pcid_enabled ?
- curpmap->pm_pcids[PCPU_GET(cpuid)].pm_pcid : 0));
- if (!pmap_pcid_enabled)
- invltlb();
-
- fpu_kern_leave(curthread, NULL);
- mtx_unlock(&efi_lock);
- PMAP_UNLOCK(curpmap);
-}
-
-static int
-efi_init(void)
-{
- struct efi_map_header *efihdr;
- struct efi_md *map;
- caddr_t kmdp;
- size_t efisz;
-
- mtx_init(&efi_lock, "efi", NULL, MTX_DEF);
-
- if (efi_systbl_phys == 0) {
- if (bootverbose)
- printf("EFI systbl not available\n");
- return (0);
- }
- efi_systbl = (struct efi_systbl *)PHYS_TO_DMAP(efi_systbl_phys);
- if (efi_systbl->st_hdr.th_sig != EFI_SYSTBL_SIG) {
- efi_systbl = NULL;
- if (bootverbose)
- printf("EFI systbl signature invalid\n");
- return (0);
- }
- efi_cfgtbl = (efi_systbl->st_cfgtbl == 0) ? NULL :
- (struct efi_cfgtbl *)efi_systbl->st_cfgtbl;
- if (efi_cfgtbl == NULL) {
- if (bootverbose)
- printf("EFI config table is not present\n");
- }
-
- kmdp = preload_search_by_type("elf kernel");
- if (kmdp == NULL)
- kmdp = preload_search_by_type("elf64 kernel");
- efihdr = (struct efi_map_header *)preload_search_info(kmdp,
- MODINFO_METADATA | MODINFOMD_EFI_MAP);
- if (efihdr == NULL) {
- if (bootverbose)
- printf("EFI map is not present\n");
- return (0);
- }
- efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;
- map = (struct efi_md *)((uint8_t *)efihdr + efisz);
- if (efihdr->descriptor_size == 0)
- return (ENOMEM);
-
- if (!efi_create_1t1_map(map, efihdr->memory_size /
- efihdr->descriptor_size, efihdr->descriptor_size)) {
- if (bootverbose)
- printf("EFI cannot create runtime map\n");
- return (ENOMEM);
- }
-
- efi_runtime = (efi_systbl->st_rt == 0) ? NULL :
- (struct efi_rt *)efi_systbl->st_rt;
- if (efi_runtime == NULL) {
- if (bootverbose)
- printf("EFI runtime services table is not present\n");
- efi_destroy_1t1_map();
- return (ENXIO);
- }
-
- return (0);
-}
-
-static void
-efi_uninit(void)
-{
-
- efi_destroy_1t1_map();
-
- efi_systbl = NULL;
- efi_cfgtbl = NULL;
- efi_runtime = NULL;
-
- mtx_destroy(&efi_lock);
-}
-
-int
-efi_rt_ok(void)
-{
-
- if (efi_runtime == NULL)
- return (ENXIO);
- return (0);
-}
-
-int
-efi_get_table(struct uuid *uuid, void **ptr)
-{
- struct efi_cfgtbl *ct;
- u_long count;
-
- if (efi_cfgtbl == NULL || efi_systbl == NULL)
- return (ENXIO);
- count = efi_systbl->st_entries;
- ct = efi_cfgtbl;
- while (count--) {
- if (!bcmp(&ct->ct_uuid, uuid, sizeof(*uuid))) {
- *ptr = (void *)PHYS_TO_DMAP(ct->ct_data);
- return (0);
- }
- ct++;
- }
- return (ENOENT);
-}
-
-int
-efi_get_time_locked(struct efi_tm *tm)
-{
- efi_status status;
- int error;
-
- mtx_assert(&atrtc_time_lock, MA_OWNED);
- error = efi_enter();
- if (error != 0)
- return (error);
- status = efi_runtime->rt_gettime(tm, NULL);
- efi_leave();
- error = efi_status_to_errno(status);
- return (error);
-}
-
-int
-efi_get_time(struct efi_tm *tm)
-{
- int error;
-
- if (efi_runtime == NULL)
- return (ENXIO);
- mtx_lock(&atrtc_time_lock);
- error = efi_get_time_locked(tm);
- mtx_unlock(&atrtc_time_lock);
- return (error);
-}
-
-int
-efi_reset_system(void)
-{
- int error;
-
- error = efi_enter();
- if (error != 0)
- return (error);
- efi_runtime->rt_reset(EFI_RESET_WARM, 0, 0, NULL);
- efi_leave();
- return (EIO);
-}
-
-int
-efi_set_time_locked(struct efi_tm *tm)
-{
- efi_status status;
- int error;
-
- mtx_assert(&atrtc_time_lock, MA_OWNED);
- error = efi_enter();
- if (error != 0)
- return (error);
- status = efi_runtime->rt_settime(tm);
- efi_leave();
- error = efi_status_to_errno(status);
- return (error);
-}
-
-int
-efi_set_time(struct efi_tm *tm)
-{
- int error;
-
- if (efi_runtime == NULL)
- return (ENXIO);
- mtx_lock(&atrtc_time_lock);
- error = efi_set_time_locked(tm);
- mtx_unlock(&atrtc_time_lock);
- return (error);
-}
-
-int
-efi_var_get(efi_char *name, struct uuid *vendor, uint32_t *attrib,
- size_t *datasize, void *data)
-{
- efi_status status;
- int error;
-
- error = efi_enter();
- if (error != 0)
- return (error);
- status = efi_runtime->rt_getvar(name, vendor, attrib, datasize, data);
- efi_leave();
- error = efi_status_to_errno(status);
- return (error);
-}
-
-int
-efi_var_nextname(size_t *namesize, efi_char *name, struct uuid *vendor)
-{
- efi_status status;
- int error;
-
- error = efi_enter();
- if (error != 0)
- return (error);
- status = efi_runtime->rt_scanvar(namesize, name, vendor);
- efi_leave();
- error = efi_status_to_errno(status);
- return (error);
-}
-
-int
-efi_var_set(efi_char *name, struct uuid *vendor, uint32_t attrib,
- size_t datasize, void *data)
-{
- efi_status status;
- int error;
-
- error = efi_enter();
- if (error != 0)
- return (error);
- status = efi_runtime->rt_setvar(name, vendor, attrib, datasize, data);
- efi_leave();
- error = efi_status_to_errno(status);
- return (error);
-}
-
-static int
-efirt_modevents(module_t m, int event, void *arg __unused)
-{
-
- switch (event) {
- case MOD_LOAD:
- return (efi_init());
-
- case MOD_UNLOAD:
- efi_uninit();
- return (0);
-
- case MOD_SHUTDOWN:
- return (0);
-
- default:
- return (EOPNOTSUPP);
- }
-}
-
-static moduledata_t efirt_moddata = {
- .name = "efirt",
- .evhand = efirt_modevents,
- .priv = NULL,
-};
-DECLARE_MODULE(efirt, efirt_moddata, SI_SUB_VM_CONF, SI_ORDER_ANY);
-MODULE_VERSION(efirt, 1);
-
-/* XXX debug stuff */
-static int
-efi_time_sysctl_handler(SYSCTL_HANDLER_ARGS)
-{
- struct efi_tm tm;
- int error, val;
-
- val = 0;
- error = sysctl_handle_int(oidp, &val, 0, req);
- if (error != 0 || req->newptr == NULL)
- return (error);
- error = efi_get_time(&tm);
- if (error == 0) {
- uprintf("EFI reports: Year %d Month %d Day %d Hour %d Min %d "
- "Sec %d\n", tm.tm_year, tm.tm_mon, tm.tm_mday, tm.tm_hour,
- tm.tm_min, tm.tm_sec);
- }
- return (error);
-}
-
-SYSCTL_PROC(_debug, OID_AUTO, efi_time, CTLTYPE_INT | CTLFLAG_RW, NULL, 0,
- efi_time_sysctl_handler, "I", "");
Index: head/sys/amd64/amd64/efirt_machdep.c
===================================================================
--- head/sys/amd64/amd64/efirt_machdep.c
+++ head/sys/amd64/amd64/efirt_machdep.c
@@ -0,0 +1,313 @@
+/*-
+ * Copyright (c) 2004 Marcel Moolenaar
+ * Copyright (c) 2001 Doug Rabson
+ * Copyright (c) 2016 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * Portions of this software were developed by Konstantin Belousov
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/efi.h>
+#include <sys/kernel.h>
+#include <sys/linker.h>
+#include <sys/lock.h>
+#include <sys/module.h>
+#include <sys/mutex.h>
+#include <sys/clock.h>
+#include <sys/proc.h>
+#include <sys/rwlock.h>
+#include <sys/sched.h>
+#include <sys/sysctl.h>
+#include <sys/systm.h>
+#include <sys/vmmeter.h>
+#include <isa/rtc.h>
+#include <machine/fpu.h>
+#include <machine/efi.h>
+#include <machine/metadata.h>
+#include <machine/md_var.h>
+#include <machine/smp.h>
+#include <machine/vmparam.h>
+#include <vm/vm.h>
+#include <vm/pmap.h>
+#include <vm/vm_map.h>
+#include <vm/vm_object.h>
+#include <vm/vm_page.h>
+#include <vm/vm_pager.h>
+
+static pml4_entry_t *efi_pml4;
+static vm_object_t obj_1t1_pt;
+static vm_page_t efi_pml4_page;
+
+void
+efi_destroy_1t1_map(void)
+{
+ vm_page_t m;
+
+ if (obj_1t1_pt != NULL) {
+ VM_OBJECT_RLOCK(obj_1t1_pt);
+ TAILQ_FOREACH(m, &obj_1t1_pt->memq, listq)
+ m->wire_count = 0;
+ atomic_subtract_int(&vm_cnt.v_wire_count,
+ obj_1t1_pt->resident_page_count);
+ VM_OBJECT_RUNLOCK(obj_1t1_pt);
+ vm_object_deallocate(obj_1t1_pt);
+ }
+
+ obj_1t1_pt = NULL;
+ efi_pml4 = NULL;
+ efi_pml4_page = NULL;
+}
+
+static vm_page_t
+efi_1t1_page(vm_pindex_t idx)
+{
+
+ return (vm_page_grab(obj_1t1_pt, idx, VM_ALLOC_NOBUSY |
+ VM_ALLOC_WIRED | VM_ALLOC_ZERO));
+}
+
+static pt_entry_t *
+efi_1t1_pte(vm_offset_t va)
+{
+ pml4_entry_t *pml4e;
+ pdp_entry_t *pdpe;
+ pd_entry_t *pde;
+ pt_entry_t *pte;
+ vm_page_t m;
+ vm_pindex_t pml4_idx, pdp_idx, pd_idx;
+ vm_paddr_t mphys;
+
+ pml4_idx = pmap_pml4e_index(va);
+ pml4e = &efi_pml4[pml4_idx];
+ if (*pml4e == 0) {
+ m = efi_1t1_page(1 + pml4_idx);
+ mphys = VM_PAGE_TO_PHYS(m);
+ *pml4e = mphys | X86_PG_RW | X86_PG_V;
+ } else {
+ mphys = *pml4e & ~PAGE_MASK;
+ }
+
+ pdpe = (pdp_entry_t *)PHYS_TO_DMAP(mphys);
+ pdp_idx = pmap_pdpe_index(va);
+ pdpe += pdp_idx;
+ if (*pdpe == 0) {
+ m = efi_1t1_page(1 + NPML4EPG + (pml4_idx + 1) * (pdp_idx + 1));
+ mphys = VM_PAGE_TO_PHYS(m);
+ *pdpe = mphys | X86_PG_RW | X86_PG_V;
+ } else {
+ mphys = *pdpe & ~PAGE_MASK;
+ }
+
+ pde = (pd_entry_t *)PHYS_TO_DMAP(mphys);
+ pd_idx = pmap_pde_index(va);
+ pde += pd_idx;
+ if (*pde == 0) {
+ m = efi_1t1_page(1 + NPML4EPG + NPML4EPG * NPDPEPG +
+ (pml4_idx + 1) * (pdp_idx + 1) * (pd_idx + 1));
+ mphys = VM_PAGE_TO_PHYS(m);
+ *pde = mphys | X86_PG_RW | X86_PG_V;
+ } else {
+ mphys = *pde & ~PAGE_MASK;
+ }
+
+ pte = (pt_entry_t *)PHYS_TO_DMAP(mphys);
+ pte += pmap_pte_index(va);
+ KASSERT(*pte == 0, ("va %#jx *pt %#jx", va, *pte));
+
+ return (pte);
+}
+
+bool
+efi_create_1t1_map(struct efi_md *map, int ndesc, int descsz)
+{
+ struct efi_md *p;
+ pt_entry_t *pte;
+ vm_offset_t va;
+ uint64_t idx;
+ int bits, i, mode;
+
+ obj_1t1_pt = vm_pager_allocate(OBJT_PHYS, NULL, ptoa(1 +
+ NPML4EPG + NPML4EPG * NPDPEPG + NPML4EPG * NPDPEPG * NPDEPG),
+ VM_PROT_ALL, 0, NULL);
+ VM_OBJECT_WLOCK(obj_1t1_pt);
+ efi_pml4_page = efi_1t1_page(0);
+ VM_OBJECT_WUNLOCK(obj_1t1_pt);
+ efi_pml4 = (pml4_entry_t *)PHYS_TO_DMAP(VM_PAGE_TO_PHYS(efi_pml4_page));
+ pmap_pinit_pml4(efi_pml4_page);
+
+ for (i = 0, p = map; i < ndesc; i++, p = efi_next_descriptor(p,
+ descsz)) {
+ if ((p->md_attr & EFI_MD_ATTR_RT) == 0)
+ continue;
+ if (p->md_virt != NULL) {
+ if (bootverbose)
+ printf("EFI Runtime entry %d is mapped\n", i);
+ goto fail;
+ }
+ if ((p->md_phys & EFI_PAGE_MASK) != 0) {
+ if (bootverbose)
+ printf("EFI Runtime entry %d is not aligned\n",
+ i);
+ goto fail;
+ }
+ if (p->md_phys + p->md_pages * EFI_PAGE_SIZE < p->md_phys ||
+ p->md_phys + p->md_pages * EFI_PAGE_SIZE >=
+ VM_MAXUSER_ADDRESS) {
+ printf("EFI Runtime entry %d is not in mappable for RT:"
+ "base %#016jx %#jx pages\n",
+ i, (uintmax_t)p->md_phys,
+ (uintmax_t)p->md_pages);
+ goto fail;
+ }
+ if ((p->md_attr & EFI_MD_ATTR_WB) != 0)
+ mode = VM_MEMATTR_WRITE_BACK;
+ else if ((p->md_attr & EFI_MD_ATTR_WT) != 0)
+ mode = VM_MEMATTR_WRITE_THROUGH;
+ else if ((p->md_attr & EFI_MD_ATTR_WC) != 0)
+ mode = VM_MEMATTR_WRITE_COMBINING;
+ else if ((p->md_attr & EFI_MD_ATTR_WP) != 0)
+ mode = VM_MEMATTR_WRITE_PROTECTED;
+ else if ((p->md_attr & EFI_MD_ATTR_UC) != 0)
+ mode = VM_MEMATTR_UNCACHEABLE;
+ else {
+ if (bootverbose)
+ printf("EFI Runtime entry %d mapping "
+ "attributes unsupported\n", i);
+ mode = VM_MEMATTR_UNCACHEABLE;
+ }
+ bits = pmap_cache_bits(kernel_pmap, mode, FALSE) | X86_PG_RW |
+ X86_PG_V;
+ VM_OBJECT_WLOCK(obj_1t1_pt);
+ for (va = p->md_phys, idx = 0; idx < p->md_pages; idx++,
+ va += PAGE_SIZE) {
+ pte = efi_1t1_pte(va);
+ pte_store(pte, va | bits);
+ }
+ VM_OBJECT_WUNLOCK(obj_1t1_pt);
+ }
+
+ return (true);
+
+fail:
+ efi_destroy_1t1_map();
+ return (false);
+}
+
+/*
+ * Create an environment for the EFI runtime code call. The most
+ * important part is creating the required 1:1 physical->virtual
+ * mappings for the runtime segments. To do that, we manually create
+ * page table which unmap userspace but gives correct kernel mapping.
+ * The 1:1 mappings for runtime segments usually occupy low 4G of the
+ * physical address map.
+ *
+ * The 1:1 mappings were chosen over the SetVirtualAddressMap() EFI RT
+ * service, because there are some BIOSes which fail to correctly
+ * relocate itself on the call, requiring both 1:1 and virtual
+ * mapping. As result, we must provide 1:1 mapping anyway, so no
+ * reason to bother with the virtual map, and no need to add a
+ * complexity into loader.
+ *
+ * The fpu_kern_enter() call allows firmware to use FPU, as mandated
+ * by the specification. In particular, CR0.TS bit is cleared. Also
+ * it enters critical section, giving us neccessary protection against
+ * context switch.
+ *
+ * There is no need to disable interrupts around the change of %cr3,
+ * the kernel mappings are correct, while we only grabbed the
+ * userspace portion of VA. Interrupts handlers must not access
+ * userspace. Having interrupts enabled fixes the issue with
+ * firmware/SMM long operation, which would negatively affect IPIs,
+ * esp. TLB shootdown requests.
+ */
+int
+efi_arch_enter(void)
+{
+ pmap_t curpmap;
+
+ curpmap = PCPU_GET(curpmap);
+ PMAP_LOCK_ASSERT(curpmap, MA_OWNED);
+
+ /*
+ * IPI TLB shootdown handler invltlb_pcid_handler() reloads
+ * %cr3 from the curpmap->pm_cr3, which would disable runtime
+ * segments mappings. Block the handler's action by setting
+ * curpmap to impossible value. See also comment in
+ * pmap.c:pmap_activate_sw().
+ */
+ if (pmap_pcid_enabled && !invpcid_works)
+ PCPU_SET(curpmap, NULL);
+
+ load_cr3(VM_PAGE_TO_PHYS(efi_pml4_page) | (pmap_pcid_enabled ?
+ curpmap->pm_pcids[PCPU_GET(cpuid)].pm_pcid : 0));
+ /*
+ * If PCID is enabled, the clear CR3_PCID_SAVE bit in the loaded %cr3
+ * causes TLB invalidation.
+ */
+ if (!pmap_pcid_enabled)
+ invltlb();
+ return (0);
+}
+
+void
+efi_arch_leave(void)
+{
+ pmap_t curpmap;
+
+ curpmap = &curproc->p_vmspace->vm_pmap;
+ if (pmap_pcid_enabled && !invpcid_works)
+ PCPU_SET(curpmap, curpmap);
+ load_cr3(curpmap->pm_cr3 | (pmap_pcid_enabled ?
+ curpmap->pm_pcids[PCPU_GET(cpuid)].pm_pcid : 0));
+ if (!pmap_pcid_enabled)
+ invltlb();
+}
+
+/* XXX debug stuff */
+static int
+efi_time_sysctl_handler(SYSCTL_HANDLER_ARGS)
+{
+ struct efi_tm tm;
+ int error, val;
+
+ val = 0;
+ error = sysctl_handle_int(oidp, &val, 0, req);
+ if (error != 0 || req->newptr == NULL)
+ return (error);
+ error = efi_get_time(&tm);
+ if (error == 0) {
+ uprintf("EFI reports: Year %d Month %d Day %d Hour %d Min %d "
+ "Sec %d\n", tm.tm_year, tm.tm_mon, tm.tm_mday, tm.tm_hour,
+ tm.tm_min, tm.tm_sec);
+ }
+ return (error);
+}
+
+SYSCTL_PROC(_debug, OID_AUTO, efi_time, CTLTYPE_INT | CTLFLAG_RW, NULL, 0,
+ efi_time_sysctl_handler, "I", "");
Index: head/sys/amd64/include/efi.h
===================================================================
--- head/sys/amd64/include/efi.h
+++ head/sys/amd64/include/efi.h
@@ -32,6 +32,8 @@
#ifndef __AMD64_INCLUDE_EFI_H_
#define __AMD64_INCLUDE_EFI_H_
+#include <isa/rtc.h>
+
/*
* XXX: from gcc 6.2 manual:
* Note, the ms_abi attribute for Microsoft Windows 64-bit targets
@@ -45,22 +47,8 @@
#define EFIABI_ATTR __attribute__((ms_abi))
#endif
-#ifdef _KERNEL
-struct uuid;
-struct efi_tm;
-
-int efi_rt_ok(void);
-int efi_get_table(struct uuid *uuid, void **ptr);
-int efi_get_time(struct efi_tm *tm);
-int efi_get_time_locked(struct efi_tm *tm);
-int efi_reset_system(void);
-int efi_set_time(struct efi_tm *tm);
-int efi_set_time_locked(struct efi_tm *tm);
-int efi_var_get(uint16_t *name, struct uuid *vendor, uint32_t *attrib,
- size_t *datasize, void *data);
-int efi_var_nextname(size_t *namesize, uint16_t *name, struct uuid *vendor);
-int efi_var_set(uint16_t *name, struct uuid *vendor, uint32_t attrib,
- size_t datasize, void *data);
-#endif
+#define EFI_TIME_LOCK() mtx_lock(&atrtc_time_lock);
+#define EFI_TIME_UNLOCK() mtx_unlock(&atrtc_time_lock);
+#define EFI_TIME_OWNED() mtx_assert(&atrtc_time_lock, MA_OWNED);
#endif /* __AMD64_INCLUDE_EFI_H_ */
Index: head/sys/conf/files
===================================================================
--- head/sys/conf/files
+++ head/sys/conf/files
@@ -1614,6 +1614,7 @@
dev/ed/if_ed_pccard.c optional ed pccard
dev/ed/if_ed_pci.c optional ed pci
dev/efidev/efidev.c optional efirt
+dev/efidev/efirt.c optional efirt
dev/e1000/if_em.c optional em \
compile-with "${NORMAL_C} -I$S/dev/e1000"
dev/e1000/em_txrx.c optional em \
Index: head/sys/conf/files.amd64
===================================================================
--- head/sys/conf/files.amd64
+++ head/sys/conf/files.amd64
@@ -133,7 +133,7 @@
amd64/amd64/db_disasm.c optional ddb
amd64/amd64/db_interface.c optional ddb
amd64/amd64/db_trace.c optional ddb
-amd64/amd64/efirt.c optional efirt
+amd64/amd64/efirt_machdep.c optional efirt
amd64/amd64/elf_machdep.c standard
amd64/amd64/exception.S standard
amd64/amd64/fpu.c standard
Index: head/sys/dev/efidev/efirt.c
===================================================================
--- head/sys/dev/efidev/efirt.c
+++ head/sys/dev/efidev/efirt.c
@@ -0,0 +1,388 @@
+/*-
+ * Copyright (c) 2004 Marcel Moolenaar
+ * Copyright (c) 2001 Doug Rabson
+ * Copyright (c) 2016 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * Portions of this software were developed by Konstantin Belousov
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/efi.h>
+#include <sys/kernel.h>
+#include <sys/linker.h>
+#include <sys/lock.h>
+#include <sys/module.h>
+#include <sys/mutex.h>
+#include <sys/clock.h>
+#include <sys/proc.h>
+#include <sys/rwlock.h>
+#include <sys/sched.h>
+#include <sys/sysctl.h>
+#include <sys/systm.h>
+#include <sys/vmmeter.h>
+
+#include <machine/fpu.h>
+#include <machine/efi.h>
+#include <machine/metadata.h>
+#include <machine/vmparam.h>
+
+#include <vm/vm.h>
+#include <vm/pmap.h>
+#include <vm/vm_map.h>
+
+static struct efi_systbl *efi_systbl;
+static struct efi_cfgtbl *efi_cfgtbl;
+static struct efi_rt *efi_runtime;
+
+static int efi_status2err[25] = {
+ 0, /* EFI_SUCCESS */
+ ENOEXEC, /* EFI_LOAD_ERROR */
+ EINVAL, /* EFI_INVALID_PARAMETER */
+ ENOSYS, /* EFI_UNSUPPORTED */
+ EMSGSIZE, /* EFI_BAD_BUFFER_SIZE */
+ EOVERFLOW, /* EFI_BUFFER_TOO_SMALL */
+ EBUSY, /* EFI_NOT_READY */
+ EIO, /* EFI_DEVICE_ERROR */
+ EROFS, /* EFI_WRITE_PROTECTED */
+ EAGAIN, /* EFI_OUT_OF_RESOURCES */
+ EIO, /* EFI_VOLUME_CORRUPTED */
+ ENOSPC, /* EFI_VOLUME_FULL */
+ ENXIO, /* EFI_NO_MEDIA */
+ ESTALE, /* EFI_MEDIA_CHANGED */
+ ENOENT, /* EFI_NOT_FOUND */
+ EACCES, /* EFI_ACCESS_DENIED */
+ ETIMEDOUT, /* EFI_NO_RESPONSE */
+ EADDRNOTAVAIL, /* EFI_NO_MAPPING */
+ ETIMEDOUT, /* EFI_TIMEOUT */
+ EDOOFUS, /* EFI_NOT_STARTED */
+ EALREADY, /* EFI_ALREADY_STARTED */
+ ECANCELED, /* EFI_ABORTED */
+ EPROTO, /* EFI_ICMP_ERROR */
+ EPROTO, /* EFI_TFTP_ERROR */
+ EPROTO /* EFI_PROTOCOL_ERROR */
+};
+
+static int
+efi_status_to_errno(efi_status status)
+{
+ u_long code;
+
+ code = status & 0x3ffffffffffffffful;
+ return (code < nitems(efi_status2err) ? efi_status2err[code] : EDOOFUS);
+}
+
+static struct mtx efi_lock;
+
+static int
+efi_init(void)
+{
+ struct efi_map_header *efihdr;
+ struct efi_md *map;
+ caddr_t kmdp;
+ size_t efisz;
+
+ mtx_init(&efi_lock, "efi", NULL, MTX_DEF);
+
+ if (efi_systbl_phys == 0) {
+ if (bootverbose)
+ printf("EFI systbl not available\n");
+ return (0);
+ }
+ efi_systbl = (struct efi_systbl *)PHYS_TO_DMAP(efi_systbl_phys);
+ if (efi_systbl->st_hdr.th_sig != EFI_SYSTBL_SIG) {
+ efi_systbl = NULL;
+ if (bootverbose)
+ printf("EFI systbl signature invalid\n");
+ return (0);
+ }
+ efi_cfgtbl = (efi_systbl->st_cfgtbl == 0) ? NULL :
+ (struct efi_cfgtbl *)efi_systbl->st_cfgtbl;
+ if (efi_cfgtbl == NULL) {
+ if (bootverbose)
+ printf("EFI config table is not present\n");
+ }
+
+ kmdp = preload_search_by_type("elf kernel");
+ if (kmdp == NULL)
+ kmdp = preload_search_by_type("elf64 kernel");
+ efihdr = (struct efi_map_header *)preload_search_info(kmdp,
+ MODINFO_METADATA | MODINFOMD_EFI_MAP);
+ if (efihdr == NULL) {
+ if (bootverbose)
+ printf("EFI map is not present\n");
+ return (0);
+ }
+ efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;
+ map = (struct efi_md *)((uint8_t *)efihdr + efisz);
+ if (efihdr->descriptor_size == 0)
+ return (ENOMEM);
+
+ if (!efi_create_1t1_map(map, efihdr->memory_size /
+ efihdr->descriptor_size, efihdr->descriptor_size)) {
+ if (bootverbose)
+ printf("EFI cannot create runtime map\n");
+ return (ENOMEM);
+ }
+
+ efi_runtime = (efi_systbl->st_rt == 0) ? NULL :
+ (struct efi_rt *)efi_systbl->st_rt;
+ if (efi_runtime == NULL) {
+ if (bootverbose)
+ printf("EFI runtime services table is not present\n");
+ efi_destroy_1t1_map();
+ return (ENXIO);
+ }
+
+ return (0);
+}
+
+static void
+efi_uninit(void)
+{
+
+ efi_destroy_1t1_map();
+
+ efi_systbl = NULL;
+ efi_cfgtbl = NULL;
+ efi_runtime = NULL;
+
+ mtx_destroy(&efi_lock);
+}
+
+int
+efi_rt_ok(void)
+{
+
+ if (efi_runtime == NULL)
+ return (ENXIO);
+ return (0);
+}
+
+static int
+efi_enter(void)
+{
+ struct thread *td;
+ pmap_t curpmap;
+ int error;
+
+ if (efi_runtime == NULL)
+ return (ENXIO);
+ td = curthread;
+ curpmap = &td->td_proc->p_vmspace->vm_pmap;
+ PMAP_LOCK(curpmap);
+ mtx_lock(&efi_lock);
+ error = fpu_kern_enter(td, NULL, FPU_KERN_NOCTX);
+ if (error != 0) {
+ PMAP_UNLOCK(curpmap);
+ return (error);
+ }
+
+ return (efi_arch_enter());
+}
+
+static void
+efi_leave(void)
+{
+ struct thread *td;
+ pmap_t curpmap;
+
+ efi_arch_leave();
+
+ curpmap = &curproc->p_vmspace->vm_pmap;
+ td = curthread;
+ fpu_kern_leave(td, NULL);
+ mtx_unlock(&efi_lock);
+ PMAP_UNLOCK(curpmap);
+}
+
+int
+efi_get_table(struct uuid *uuid, void **ptr)
+{
+ struct efi_cfgtbl *ct;
+ u_long count;
+
+ if (efi_cfgtbl == NULL || efi_systbl == NULL)
+ return (ENXIO);
+ count = efi_systbl->st_entries;
+ ct = efi_cfgtbl;
+ while (count--) {
+ if (!bcmp(&ct->ct_uuid, uuid, sizeof(*uuid))) {
+ *ptr = (void *)PHYS_TO_DMAP(ct->ct_data);
+ return (0);
+ }
+ ct++;
+ }
+ return (ENOENT);
+}
+
+static int
+efi_get_time_locked(struct efi_tm *tm)
+{
+ efi_status status;
+ int error;
+
+ EFI_TIME_OWNED()
+ error = efi_enter();
+ if (error != 0)
+ return (error);
+ status = efi_runtime->rt_gettime(tm, NULL);
+ efi_leave();
+ error = efi_status_to_errno(status);
+ return (error);
+}
+
+int
+efi_get_time(struct efi_tm *tm)
+{
+ int error;
+
+ if (efi_runtime == NULL)
+ return (ENXIO);
+ EFI_TIME_LOCK()
+ error = efi_get_time_locked(tm);
+ EFI_TIME_UNLOCK()
+ return (error);
+}
+
+int
+efi_reset_system(void)
+{
+ int error;
+
+ error = efi_enter();
+ if (error != 0)
+ return (error);
+ efi_runtime->rt_reset(EFI_RESET_WARM, 0, 0, NULL);
+ efi_leave();
+ return (EIO);
+}
+
+static int
+efi_set_time_locked(struct efi_tm *tm)
+{
+ efi_status status;
+ int error;
+
+ EFI_TIME_OWNED();
+ error = efi_enter();
+ if (error != 0)
+ return (error);
+ status = efi_runtime->rt_settime(tm);
+ efi_leave();
+ error = efi_status_to_errno(status);
+ return (error);
+}
+
+int
+efi_set_time(struct efi_tm *tm)
+{
+ int error;
+
+ if (efi_runtime == NULL)
+ return (ENXIO);
+ EFI_TIME_LOCK()
+ error = efi_set_time_locked(tm);
+ EFI_TIME_UNLOCK()
+ return (error);
+}
+
+int
+efi_var_get(efi_char *name, struct uuid *vendor, uint32_t *attrib,
+ size_t *datasize, void *data)
+{
+ efi_status status;
+ int error;
+
+ error = efi_enter();
+ if (error != 0)
+ return (error);
+ status = efi_runtime->rt_getvar(name, vendor, attrib, datasize, data);
+ efi_leave();
+ error = efi_status_to_errno(status);
+ return (error);
+}
+
+int
+efi_var_nextname(size_t *namesize, efi_char *name, struct uuid *vendor)
+{
+ efi_status status;
+ int error;
+
+ error = efi_enter();
+ if (error != 0)
+ return (error);
+ status = efi_runtime->rt_scanvar(namesize, name, vendor);
+ efi_leave();
+ error = efi_status_to_errno(status);
+ return (error);
+}
+
+int
+efi_var_set(efi_char *name, struct uuid *vendor, uint32_t attrib,
+ size_t datasize, void *data)
+{
+ efi_status status;
+ int error;
+
+ error = efi_enter();
+ if (error != 0)
+ return (error);
+ status = efi_runtime->rt_setvar(name, vendor, attrib, datasize, data);
+ efi_leave();
+ error = efi_status_to_errno(status);
+ return (error);
+}
+
+static int
+efirt_modevents(module_t m, int event, void *arg __unused)
+{
+
+ switch (event) {
+ case MOD_LOAD:
+ return (efi_init());
+
+ case MOD_UNLOAD:
+ efi_uninit();
+ return (0);
+
+ case MOD_SHUTDOWN:
+ return (0);
+
+ default:
+ return (EOPNOTSUPP);
+ }
+}
+
+static moduledata_t efirt_moddata = {
+ .name = "efirt",
+ .evhand = efirt_modevents,
+ .priv = NULL,
+};
+DECLARE_MODULE(efirt, efirt_moddata, SI_SUB_VM_CONF, SI_ORDER_ANY);
+MODULE_VERSION(efirt, 1);
Index: head/sys/modules/efirt/Makefile
===================================================================
--- head/sys/modules/efirt/Makefile
+++ head/sys/modules/efirt/Makefile
@@ -4,7 +4,7 @@
.PATH: ${SRCTOP}/sys/dev/efidev
KMOD= efirt
-SRCS= efirt.c efidev.c
+SRCS= efirt.c efirt_machdep.c efidev.c
SRCS+= device_if.h bus_if.h
.include <bsd.kmod.mk>
Index: head/sys/sys/efi.h
===================================================================
--- head/sys/sys/efi.h
+++ head/sys/sys/efi.h
@@ -168,6 +168,25 @@
};
extern vm_paddr_t efi_systbl_phys;
+
+/* Internal MD EFI functions */
+int efi_arch_enter(void);
+void efi_arch_leave(void);
+bool efi_create_1t1_map(struct efi_md *, int, int);
+void efi_destroy_1t1_map(void);
+
+/* Public MI EFI functions */
+int efi_rt_ok(void);
+int efi_get_table(struct uuid *uuid, void **ptr);
+int efi_get_time(struct efi_tm *tm);
+int efi_reset_system(void);
+int efi_set_time(struct efi_tm *tm);
+int efi_var_get(uint16_t *name, struct uuid *vendor, uint32_t *attrib,
+ size_t *datasize, void *data);
+int efi_var_nextname(size_t *namesize, uint16_t *name, struct uuid *vendor);
+int efi_var_set(uint16_t *name, struct uuid *vendor, uint32_t attrib,
+ size_t datasize, void *data);
+
#endif /* _KERNEL */
#endif /* _SYS_EFI_H_ */

File Metadata

Mime Type
text/plain
Expires
Fri, Dec 20, 10:59 AM (21 h, 8 m)
Storage Engine
blob
Storage Format
Raw Data
Storage Handle
15529644
Default Alt Text
D12434.diff (37 KB)

Event Timeline