uefi: Even saner handling of exiting boot services
diff --git a/stage23/lib/blib.c b/stage23/lib/blib.c
index a827d259..1f708b23 100644
--- a/stage23/lib/blib.c
+++ b/stage23/lib/blib.c
@@ -86,6 +86,10 @@ bool efi_exit_boot_services(void) {
efi_mmap_size += 4096;
+ status = uefi_call_wrapper(gBS->FreePool, 1, efi_mmap);
+ if (status)
+ goto fail;
+
status = uefi_call_wrapper(gBS->AllocatePool, 3,
EfiLoaderData, efi_mmap_size, &efi_mmap);
if (status)
@@ -112,19 +116,8 @@ bool efi_exit_boot_services(void) {
for (size_t i = 0; i < entry_count; i++) {
EFI_MEMORY_DESCRIPTOR *entry = (void *)efi_mmap + i * efi_desc_size;
- uint64_t base = entry->PhysicalStart;
- uint64_t length = entry->NumberOfPages * 4096;
-
- // Find for a match in the untouched memory map
- for (size_t j = 0; j < untouched_memmap_entries; j++) {
- if (untouched_memmap[j].type != MEMMAP_USABLE)
- continue;
-
- if (untouched_memmap[j].base == base && untouched_memmap[j].length == length) {
- // It's a match!
- entry->Type = EfiConventionalMemory;
- break;
- }
+ if (entry->Type == 0x80000000) {
+ entry->Type = EfiConventionalMemory;
}
}
diff --git a/stage23/mm/pmm.h b/stage23/mm/pmm.h
index 7483478d..f0b8a30d 100644
--- a/stage23/mm/pmm.h
+++ b/stage23/mm/pmm.h
@@ -19,11 +19,6 @@
extern struct e820_entry_t memmap[];
extern size_t memmap_entries;
-#if defined (uefi)
-extern struct e820_entry_t untouched_memmap[];
-extern size_t untouched_memmap_entries;
-#endif
-
void init_memmap(void);
struct e820_entry_t *get_memmap(size_t *entries);
struct e820_entry_t *get_raw_memmap(size_t *entry_count);
diff --git a/stage23/mm/pmm.s2.c b/stage23/mm/pmm.s2.c
index c0717559..921db84d 100644
--- a/stage23/mm/pmm.s2.c
+++ b/stage23/mm/pmm.s2.c
@@ -51,11 +51,6 @@ void *conv_mem_alloc(size_t count) {
struct e820_entry_t memmap[MEMMAP_MAX_ENTRIES];
size_t memmap_entries = 0;
-#if defined (uefi)
-struct e820_entry_t untouched_memmap[MEMMAP_MAX_ENTRIES];
-size_t untouched_memmap_entries = 0;
-#endif
-
static const char *memmap_type(uint32_t type) {
switch (type) {
case MEMMAP_USABLE:
@@ -315,9 +310,6 @@ void init_memmap(void) {
sanitise_entries(memmap, &memmap_entries, false);
- memcpy(untouched_memmap, memmap, memmap_entries * sizeof(struct e820_entry_t));
- untouched_memmap_entries = memmap_entries;
-
allocations_disallowed = false;
// Let's leave 64MiB to the firmware
@@ -331,7 +323,7 @@ void init_memmap(void) {
EFI_PHYSICAL_ADDRESS base = memmap[i].base;
status = uefi_call_wrapper(gBS->AllocatePages, 4,
- AllocateAddress, EfiLoaderData, memmap[i].length / 4096, &base);
+ AllocateAddress, 0x80000000, memmap[i].length / 4096, &base);
if (status)
panic("pmm: AllocatePages failure (%x)", status);
