diff options
Diffstat (limited to 'lib/efi_loader/efi_memory.c')
| -rw-r--r-- | lib/efi_loader/efi_memory.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/lib/efi_loader/efi_memory.c b/lib/efi_loader/efi_memory.c index 71a3d19269..9e669f5102 100644 --- a/lib/efi_loader/efi_memory.c +++ b/lib/efi_loader/efi_memory.c @@ -27,6 +27,10 @@ struct efi_mem_list { /* This list contains all memory map items */ LIST_HEAD(efi_mem); +#ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER +void *efi_bounce_buffer; +#endif + /* * Sorts the memory list from highest address to lowest address * @@ -349,5 +353,17 @@ int efi_memory_init(void) efi_add_memory_map(runtime_start, runtime_pages, EFI_RUNTIME_SERVICES_CODE, false); +#ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER + /* Request a 32bit 64MB bounce buffer region */ + uint64_t efi_bounce_buffer_addr = 0xffffffff; + + if (efi_allocate_pages(1, EFI_LOADER_DATA, + (64 * 1024 * 1024) >> EFI_PAGE_SHIFT, + &efi_bounce_buffer_addr) != EFI_SUCCESS) + return -1; + + efi_bounce_buffer = (void*)(uintptr_t)efi_bounce_buffer_addr; +#endif + return 0; } |
