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1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  * From coreboot file of same name
4  */
5 
6 #ifndef _PCI_ROM_H
7 #define _PCI_ROM_H
8 
9 #define PCI_ROM_HDR			0xaa55
10 
11 struct pci_rom_header {
12 	uint16_t signature;
13 	uint8_t size;
14 	uint8_t init[3];
15 	uint8_t reserved[0x12];
16 	uint16_t data;
17 };
18 
19 struct pci_rom_data {
20 	uint32_t signature;
21 	uint16_t vendor;
22 	uint16_t device;
23 	uint16_t reserved_1;
24 	uint16_t dlen;
25 	uint8_t drevision;
26 	uint8_t class_lo;
27 	uint16_t class_hi;
28 	uint16_t ilen;
29 	uint16_t irevision;
30 	uint8_t type;
31 	uint8_t indicator;
32 	uint16_t reserved_2;
33 };
34 
35 /*
36  * Determines which execution method is used and whether we allow falling back
37  * to the other if the requested method is not available.
38  */
39 enum pci_rom_emul {
40 	PCI_ROM_EMULATE		= 0 << 0,
41 	PCI_ROM_USE_NATIVE	= 1 << 0,
42 	PCI_ROM_ALLOW_FALLBACK	= 1 << 1,
43 };
44 
45  /**
46  * dm_pci_run_vga_bios() - Run the VGA BIOS in an x86 PC
47  *
48  * @dev:	Video device containing the BIOS
49  * @int15_handler:	Function to call to handle int 0x15
50  * @exec_method:	flags from enum pci_rom_emul
51  */
52 int dm_pci_run_vga_bios(struct udevice *dev, int (*int15_handler)(void),
53 			int exec_method);
54 
55 /**
56  * board_map_oprom_vendev() - map several PCI IDs to the one the ROM expects
57  *
58  * Some VGA option roms are used for several chipsets but they only have one
59  * PCI ID in their header. If we encounter such an option rom, we need to do
60  * the mapping ourselves.
61  *
62  * @vendev:	Vendor and device for the video device
63  * @return standard vendor and device expected by the ROM
64  */
65 uint32_t board_map_oprom_vendev(uint32_t vendev);
66 
67 #endif
68