u-boot/include/pci_rom.h
Simon Glass bc17d8f4ac x86: video: Allow video ROM execution to fall back to the other method
If the BIOS emulator is not available, allow use of native execution if
available, and vice versa. This can be controlled by the caller.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2015-02-05 22:16:43 -07:00

69 lines
1.5 KiB
C

/*
* From coreboot file of same name
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _PCI_ROM_H
#define _PCI_ROM_H
#define PCI_ROM_HDR 0xaa55
struct pci_rom_header {
uint16_t signature;
uint8_t size;
uint8_t init[3];
uint8_t reserved[0x12];
uint16_t data;
};
struct pci_rom_data {
uint32_t signature;
uint16_t vendor;
uint16_t device;
uint16_t reserved_1;
uint16_t dlen;
uint8_t drevision;
uint8_t class_lo;
uint16_t class_hi;
uint16_t ilen;
uint16_t irevision;
uint8_t type;
uint8_t indicator;
uint16_t reserved_2;
};
/*
* Determines which execution method is used and whether we allow falling back
* to the other if the requested method is not available.
*/
enum pci_rom_emul {
PCI_ROM_EMULATE = 0 << 0,
PCI_ROM_USE_NATIVE = 1 << 0,
PCI_ROM_ALLOW_FALLBACK = 1 << 1,
};
/**
* pci_run_vga_bios() - Run the VGA BIOS in an x86 PC
*
* @dev: Video device containing the BIOS
* @int15_handler: Function to call to handle int 0x15
* @exec_method: flags from enum pci_rom_emul
*/
int pci_run_vga_bios(pci_dev_t dev, int (*int15_handler)(void),
int exec_method);
/**
* board_map_oprom_vendev() - map several PCI IDs to the one the ROM expects
*
* Some VGA option roms are used for several chipsets but they only have one
* PCI ID in their header. If we encounter such an option rom, we need to do
* the mapping ourselves.
*
* @vendev: Vendor and device for the video device
* @return standard vendor and device expected by the ROM
*/
uint32_t board_map_oprom_vendev(uint32_t vendev);
#endif