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Differential D25201 Diff 72905 sys/arm64/arm64/machdep.c

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sys/arm64/arm64/machdep.c

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int64_t dczva_line_size; /* The size of cache line the dc zva zeroes */ int64_t dczva_line_size; /* The size of cache line the dc zva zeroes */
int has_pan; int has_pan;
/* /*
* Physical address of the EFI System Table. Stashed from the metadata hints * Physical address of the EFI System Table. Stashed from the metadata hints
* passed into the kernel and used by the EFI code to call runtime services. * passed into the kernel and used by the EFI code to call runtime services.
*/ */
vm_paddr_t efi_systbl_phys; vm_paddr_t efi_systbl_phys;
static struct efi_map_header *efihdr;
/* pagezero_* implementations are provided in support.S */ /* pagezero_* implementations are provided in support.S */
void pagezero_simple(void *); void pagezero_simple(void *);
void pagezero_cache(void *); void pagezero_cache(void *);
/* pagezero_simple is default pagezero */ /* pagezero_simple is default pagezero */
void (*pagezero)(void *p) = pagezero_simple; void (*pagezero)(void *p) = pagezero_simple;
▲ Show 20 Lines • Show All 935 Lines • ▼ Show 20 Lines else {
dczva_line_shift = DCZID_BS_SIZE(dczid_el0); dczva_line_shift = DCZID_BS_SIZE(dczid_el0);
dczva_line_size = sizeof(int) << dczva_line_shift; dczva_line_size = sizeof(int) << dczva_line_shift;
/* Change pagezero function */ /* Change pagezero function */
pagezero = pagezero_cache; pagezero = pagezero_cache;
} }
} }
int
memory_mapping_mode(vm_paddr_t pa)
{
struct efi_md *map, *p;
size_t efisz;
int ndesc, i;
if (efihdr == NULL)
return (VM_MEMATTR_WRITE_BACK);
/*
* Memory map data provided by UEFI via the GetMemoryMap
* Boot Services API.
*/
efisz = (sizeof(struct efi_map_header) + 0xf) & ~0xf;
map = (struct efi_md *)((uint8_t *)efihdr + efisz);
if (efihdr->descriptor_size == 0)
return (VM_MEMATTR_WRITE_BACK);
ndesc = efihdr->memory_size / efihdr->descriptor_size;
for (i = 0, p = map; i < ndesc; i++,
p = efi_next_descriptor(p, efihdr->descriptor_size)) {
if (pa < p->md_phys || pa >= p->md_phys + p->md_pages * EFI_PAGE_SIZE)
continue;
if (p->md_type == EFI_MD_TYPE_IOMEM || p->md_type == EFI_MD_TYPE_IOPORT)
return (VM_MEMATTR_DEVICE);
else if ((p->md_attr & EFI_MD_ATTR_WB) != 0 || p->md_type == EFI_MD_TYPE_RECLAIM)
return (VM_MEMATTR_WRITE_BACK);
else if ((p->md_attr & EFI_MD_ATTR_WT) != 0)
return (VM_MEMATTR_WRITE_THROUGH);
else if ((p->md_attr & EFI_MD_ATTR_WC) != 0)
return (VM_MEMATTR_WRITE_COMBINING);
}
andrewUnsubmitted
Done
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I think you can add a break or return a device memory type at the end of the loop as we shouldn't see overlapping entries.

andrew: I think you can add a `break` or return a device memory type at the end of the loop as we…
return (VM_MEMATTR_DEVICE);
}
void void
initarm(struct arm64_bootparams *abp) initarm(struct arm64_bootparams *abp)
{ {
struct efi_fb *efifb; struct efi_fb *efifb;
struct efi_map_header *efihdr;
struct pcpu *pcpup; struct pcpu *pcpup;
char *env; char *env;
#ifdef FDT #ifdef FDT
struct mem_region mem_regions[FDT_MEM_REGIONS]; struct mem_region mem_regions[FDT_MEM_REGIONS];
int mem_regions_sz; int mem_regions_sz;
#endif #endif
vm_offset_t lastaddr; vm_offset_t lastaddr;
caddr_t kmdp; caddr_t kmdp;
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