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efi: stub: Pass EFI GOP information to U-Boot payload

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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>
This commit is contained in:
Bin Meng 2018-06-12 08:36:21 -07:00
parent 252d41f1ae
commit d1fe992746
2 changed files with 50 additions and 0 deletions
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35
include/efi.h
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@ -241,6 +241,7 @@ 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,
@ -297,6 +298,40 @@ 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)
{