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pci_rom_exp_header(9s)


NAME

  pci_rom_exp_header - PCI: Describes the address space of a PCI ROM image


SYNOPSIS

  __________________________________
  Member Name	     Data Type
  __________________________________
  rom_sig	     u_short
  rom_sig_len	     u_char
  init_vec	     struct init_vec
  pci_rom_data_off   u_short
  __________________________________


MEMBERS

  rom_sig Contains a 2-byte signature (the symbolic constant
	  PCI_ROM_SIGNATURE).

  rom_sig_len
	  Contains the length of the ROM segment in 512-byte blocks.

  init_vec
	  Contains (for Intel architectures) a 3-byte jump instruction to the
	  start of the initialization code.  For other architectures, it
	  contains a 32-bit offset to the initialization code from the start
	  of the pci_rom_exp_header data structure.

  pci_rom_data_off
	  Contains an offset to the PCI data structure from the start of the
	  pci_rom_exp_header data structure.


DESCRIPTION

  The pci_rom_exp_header data structure describes the address space of a PCI
  device's expansion ROM. The data structure itself is located at the
  beginning of the ROM image.


FILES

  <io/dec/pci/pci.h>


SEE ALSO

  Data Structures: pci_rom_data(9s), pci_config_hdr(9s), pci_rom_data(9s)

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