diff options
Diffstat (limited to 'lib/efi_loader/efi_memory.c')
| -rw-r--r-- | lib/efi_loader/efi_memory.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/lib/efi_loader/efi_memory.c b/lib/efi_loader/efi_memory.c index 1ffcf92eb2..f225a9028c 100644 --- a/lib/efi_loader/efi_memory.c +++ b/lib/efi_loader/efi_memory.c @@ -555,13 +555,21 @@ __weak void efi_add_known_memory(void) /* Add RAM */ for (i = 0; i < CONFIG_NR_DRAM_BANKS; i++) { - u64 ram_start = gd->bd->bi_dram[i].start; - u64 ram_size = gd->bd->bi_dram[i].size; - u64 start = (ram_start + EFI_PAGE_MASK) & ~EFI_PAGE_MASK; - u64 pages = (ram_size + EFI_PAGE_MASK) >> EFI_PAGE_SHIFT; + u64 ram_end, ram_start, pages; - efi_add_memory_map(start, pages, EFI_CONVENTIONAL_MEMORY, - false); + ram_start = gd->bd->bi_dram[i].start; + ram_end = ram_start + gd->bd->bi_dram[i].size; + + /* Remove partial pages */ + ram_end &= ~EFI_PAGE_MASK; + ram_start = (ram_start + EFI_PAGE_MASK) & ~EFI_PAGE_MASK; + + if (ram_end > ram_start) { + pages = (ram_end - ram_start) >> EFI_PAGE_SHIFT; + + efi_add_memory_map(ram_start, pages, + EFI_CONVENTIONAL_MEMORY, false); + } } } |