If UEFI BIOS has the graphics output protocol (GOP), let's pass its information to U-Boot payload so that U-Boot can utilize it (eg: an EFI framebuffer driver).
Signed-off-by: Bin Meng bmeng.cn@gmail.com Reviewed-by: Simon Glass sjg@chromium.org ---
Changes in v2: None
include/efi.h | 35 +++++++++++++++++++++++++++++++++++ lib/efi/efi_stub.c | 15 +++++++++++++++ 2 files changed, 50 insertions(+)
diff --git a/include/efi.h b/include/efi.h index 5e1e8ac..639ace0 100644 --- a/include/efi.h +++ b/include/efi.h @@ -233,6 +233,7 @@ struct efi_open_protocol_info_entry { enum efi_entry_t { EFIET_END, /* Signals this is the last (empty) entry */ EFIET_MEMORY_MAP, + EFIET_GOP_MODE,
/* Number of entries */ EFIET_MEMORY_COUNT, @@ -289,6 +290,40 @@ struct efi_entry_memmap { struct efi_mem_desc desc[]; };
+/** + * struct efi_entry_gopmode - a GOP mode table passed to U-Boot + * + * @fb_base: EFI's framebuffer base address + * @fb_size: EFI's framebuffer size + * @info_size: GOP mode info structure size + * @info: Start address of the GOP mode info structure + */ +struct efi_entry_gopmode { + efi_physical_addr_t fb_base; + /* + * Not like the ones in 'struct efi_gop_mode' which are 'unsigned + * long', @fb_size and @info_size have to be 'u64' here. As the EFI + * stub codes may have different bit size from the U-Boot payload, + * using 'long' will cause mismatch between the producer (stub) and + * the consumer (payload). + */ + u64 fb_size; + u64 info_size; + /* + * We cannot directly use 'struct efi_gop_mode_info info[]' here as + * it causes compiler to complain: array type has incomplete element + * type 'struct efi_gop_mode_info'. + */ + struct /* efi_gop_mode_info */ { + u32 version; + u32 width; + u32 height; + u32 pixel_format; + u32 pixel_bitmask[4]; + u32 pixels_per_scanline; + } info[]; +}; + static inline struct efi_mem_desc *efi_get_next_mem_desc( struct efi_entry_memmap *map, struct efi_mem_desc *desc) { diff --git a/lib/efi/efi_stub.c b/lib/efi/efi_stub.c index 09023a2..4819373 100644 --- a/lib/efi/efi_stub.c +++ b/lib/efi/efi_stub.c @@ -274,6 +274,9 @@ efi_status_t efi_main(efi_handle_t image, struct efi_system_table *sys_table) struct efi_boot_services *boot = sys_table->boottime; struct efi_mem_desc *desc; struct efi_entry_memmap map; + struct efi_gop *gop; + struct efi_entry_gopmode mode; + efi_guid_t efi_gop_guid = EFI_GOP_GUID; efi_uintn_t key, desc_size, size; efi_status_t ret; u32 version; @@ -312,6 +315,18 @@ efi_status_t efi_main(efi_handle_t image, struct efi_system_table *sys_table) if (ret) return ret;
+ ret = boot->locate_protocol(&efi_gop_guid, NULL, (void **)&gop); + if (ret) { + puts(" GOP unavailable\n"); + } else { + mode.fb_base = gop->mode->fb_base; + mode.fb_size = gop->mode->fb_size; + mode.info_size = gop->mode->info_size; + add_entry_addr(priv, EFIET_GOP_MODE, &mode, sizeof(mode), + gop->mode->info, + sizeof(struct efi_gop_mode_info)); + } + ret = boot->get_memory_map(&size, desc, &key, &desc_size, &version); if (ret) { printhex2(ret);