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Add a few more helper functions for working with memory descriptors:

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o   efi_md_find() - returns the md that covers the given address
o   efi_md_last() - returns the last md in the list
o   efi_md_prev() - returns the md that preceeds the given md.
This commit is contained in:
Marcel Moolenaar 2011-07-16 19:56:07 +00:00
parent 4d91ecaf4c
commit 303c22c53b
2 changed files with 54 additions and 4 deletions
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55
sys/ia64/ia64/efi.c
View File

@ -161,20 +161,67 @@ efi_get_time(struct efi_tm *tm)
struct efi_md *
efi_md_first(void)
{
struct efi_md *md;
if (bootinfo->bi_memmap == 0)
return (NULL);
return ((struct efi_md *)bootinfo->bi_memmap);
md = (struct efi_md *)bootinfo->bi_memmap;
return (md);
}
struct efi_md *
efi_md_last(void)
{
struct efi_md *md;
if (bootinfo->bi_memmap == 0)
return (NULL);
md = (struct efi_md *)(bootinfo->bi_memmap + bootinfo->bi_memmap_size -
bootinfo->bi_memdesc_size);
return (md);
}
struct efi_md *
efi_md_next(struct efi_md *md)
{
uint64_t plim;
struct efi_md *lim;
plim = bootinfo->bi_memmap + bootinfo->bi_memmap_size;
lim = efi_md_last();
md = (struct efi_md *)((uintptr_t)md + bootinfo->bi_memdesc_size);
return ((md >= (struct efi_md *)plim) ? NULL : md);
return ((md > lim) ? NULL : md);
}
struct efi_md *
efi_md_prev(struct efi_md *md)
{
struct efi_md *lim;
lim = efi_md_first();
md = (struct efi_md *)((uintptr_t)md - bootinfo->bi_memdesc_size);
return ((md < lim) ? NULL : md);
}
struct efi_md *
efi_md_find(vm_paddr_t pa)
{
static struct efi_md *last = NULL;
struct efi_md *md, *p0, *p1;
md = (last != NULL) ? last : efi_md_first();
p1 = p0 = NULL;
while (md != NULL && md != p1) {
if (pa >= md->md_phys &&
pa < md->md_phys + md->md_pages * EFI_PAGE_SIZE) {
last = md;
return (md);
}
p1 = p0;
p0 = md;
md = (pa < md->md_phys) ? efi_md_prev(md) : efi_md_next(md);
}
return (NULL);
}
void

3
sys/ia64/include/efi.h
View File

@ -161,8 +161,11 @@ void efi_boot_finish(void);
int efi_boot_minimal(uint64_t);
void *efi_get_table(struct uuid *);
void efi_get_time(struct efi_tm *);
struct efi_md *efi_md_find(vm_paddr_t);
struct efi_md *efi_md_first(void);
struct efi_md *efi_md_last(void);
struct efi_md *efi_md_next(struct efi_md *);
struct efi_md *efi_md_prev(struct efi_md *);
void efi_reset_system(void);
int efi_set_time(struct efi_tm *);
int efi_var_get(efi_char *, struct uuid *, uint32_t *, size_t *, void *);