diff options
Diffstat (limited to 'drivers/firmware/efi/memmap.c')
| -rw-r--r-- | drivers/firmware/efi/memmap.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/firmware/efi/memmap.c b/drivers/firmware/efi/memmap.c index 2df7238eb44e..cd96086fd851 100644 --- a/drivers/firmware/efi/memmap.c +++ b/drivers/firmware/efi/memmap.c @@ -140,6 +140,31 @@ int __init efi_memmap_init_late(phys_addr_t addr, unsigned long size) } /** + * efi_memmap_install - Install a new EFI memory map in efi.memmap + * @addr: Physical address of the memory map + * @nr_map: Number of entries in the memory map + * + * Unlike efi_memmap_init_*(), this function does not allow the caller + * to switch from early to late mappings. It simply uses the existing + * mapping function and installs the new memmap. + * + * Returns zero on success, a negative error code on failure. + */ +int __init efi_memmap_install(phys_addr_t addr, unsigned int nr_map) +{ + struct efi_memory_map_data data; + + efi_memmap_unmap(); + + data.phys_map = addr; + data.size = efi.memmap.desc_size * nr_map; + data.desc_version = efi.memmap.desc_version; + data.desc_size = efi.memmap.desc_size; + + return __efi_memmap_init(&data, efi.memmap.late); +} + +/** * efi_memmap_split_count - Count number of additional EFI memmap entries * @md: EFI memory descriptor to split * @range: Address range (start, end) to split around |