/*
* Create the 1:1 virtual to physical map for EFI
*/
bool
efi_create_1t1_map(struct efi_md *map, int ndesc, int descsz)
{
struct efi_md *p;
pt_entry_t *l3;
vm_offset_t va;
uint64_t idx;
int i, mode;
obj_1t1_pt = vm_pager_allocate(OBJT_PHYS, NULL, L0_ENTRIES +
L0_ENTRIES * Ln_ENTRIES + L0_ENTRIES * Ln_ENTRIES * Ln_ENTRIES +
L0_ENTRIES * Ln_ENTRIES * Ln_ENTRIES * Ln_ENTRIES,
VM_PROT_ALL, 0, NULL);
VM_OBJECT_WLOCK(obj_1t1_pt);
efi_l0_page = efi_1t1_page(0);
VM_OBJECT_WUNLOCK(obj_1t1_pt);
efi_l0 = (pd_entry_t *)PHYS_TO_DMAP(VM_PAGE_TO_PHYS(efi_l0_page));
bzero(efi_l0, L0_ENTRIES * sizeof(*efi_l0));
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_UC) != 0)
mode = VM_MEMATTR_UNCACHEABLE;
else {
if (bootverbose)
printf("EFI Runtime entry %d mapping "
"attributes unsupported\n", i);
mode = VM_MEMATTR_UNCACHEABLE;
}
printf("MAP %lx mode %x pages %lu\n", p->md_phys, mode, p->md_pages);
VM_OBJECT_WLOCK(obj_1t1_pt);
for (va = p->md_phys, idx = 0; idx < p->md_pages; idx++,
va += PAGE_SIZE) {
l3 = efi_1t1_l3(va);
*l3 = va | ATTR_DEFAULT | ATTR_IDX(mode) |
ATTR_AP(ATTR_AP_RW) | L3_PAGE;
}
VM_OBJECT_WUNLOCK(obj_1t1_pt);
}
return (true);
fail:
efi_destroy_1t1_map();
return (false);
}
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);
efi_1t1_idx = 0;
VM_OBJECT_WLOCK(obj_1t1_pt);
efi_pml4_page = efi_1t1_page();
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 && (uint64_t)p->md_virt != p->md_phys) {
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);
}
