include/pci_rom.h

   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