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Hex Fiend binary template for PCI option ROMs
# PCI option ROM binary template
little_endian
set image_num 0
set image_offset 0
set has_next_image 1
while {$has_next_image == 1} {
section "ROM Header $image_num" {
goto $image_offset
requires $image_offset "55 AA"
uint16 -hex "ROM Signature"
goto [expr $image_offset + 0x18]
set pci_data_offset [uint16]
goto [expr $image_offset + $pci_data_offset + 0x14]
set code_type [uint8]
goto [expr $image_offset + 2]
switch $code_type {
0 {
# Intel x86/PC compatible
# Documented in: PCI Firmware Specification, Revision 3.1
# Section 5.2.1: PC-compatible Expansion ROMs (Code Type 0)
set image_size [uint8 "Image Size"]
set init_entry_point [hex 3 "Init Entry Point"]
hex 0x12 "Reserved"
}
1 {
# Open Firmware
# Documented in: PCI Bus Binding to Open Firmware, Revision 2.1
# Section 9: ROM Image Format for FCode
set fcode_program_offset [uint16 -hex "FCode Program Offset"]
hex 0x14 "Reserved"
}
2 {
# Hewlett-Packard PA RISC
hex 0x16 "Reserved"
}
3 {
# Extensible Firmware Interface (EFI)
# Documented in: Unified Extensible Firmware Interface Specification, Version 2.8
# Section 14.4.2: PCI Option ROMs, Table 133
set image_size [uint16 "Image Size"]
requires [expr $image_offset + 4] "F1 0E"
uint32 -hex "EFI Signature"
set efi_subsystem [uint16 -hex "EFI Subsystem"]
set efi_machine_type [uint16 -hex "EFI Machine Type"]
set efi_compression_type [uint16 -hex "EFI Compression Type"]
hex 8 "Reserved"
set efi_image_offset [uint16 -hex "EFI Image Offset"]
}
default {
hex 0x16 "Reserved"
}
}
set pci_data_offset [uint16 -hex "PCI Data Structure Offset"]
}
if {$pci_data_offset != 0} {
goto [expr $image_offset + $pci_data_offset + 0xC]
set pci_data_rev [uint8]
goto [expr $image_offset + $pci_data_offset]
section "PCI Data Structure $image_num" {
requires [expr $image_offset + $pci_data_offset] "50 43 49 52" ; # "PCIR"
ascii 4 "Signature"
set vendor_id [uint16 -hex "Vendor ID"]
set device_id [uint16 -hex "Device ID"]
if {$pci_data_rev == 3} {
set device_list_offset [uint16 -hex "Device List Offset"]
} else {
uint16 -hex "Reserved"
}
set pci_data_len [uint16 "PCI Data Structure Length"]
set pci_data_rev [uint8 "PCI Data Structure Revision"]
set class_code [hex 3 "Class Code"]
set image_len [uint16 "Image Length"]
set vendor_rom_rev [uint16 "Vendor ROM Revision"]
set code_type [uint8 "Code Type"]
set last_image_indicator [uint8 -hex "Last Image Indicator"]
if {$pci_data_rev == 3} {
set max_runtime_image_len [uint16 "Maximum Runtime Image Length"]
set config_utility_code_offset [uint16 -hex "Configuration Utility Code Offset"]
set dmtf_clp_entry_point_offset [uint16 -hex "DMTF CLP Entry Point Offset"]
} else {
uint16 -hex "Reserved"
}
# Surely there's a better way to do this...?
set has_next_image [expr $last_image_indicator >> 7]
set has_next_image [expr ! $has_next_image]
if {$has_next_image == 1} {
incr image_offset [expr $image_len * 512]
}
}
}
if {$pci_data_rev == 3 && $device_list_offset != 0} {
goto [expr $image_offset + $pci_data_offset + $device_list_offset]
section "Device List $image_num" {
set device_id_idx 0
set supported_device_id(device_id_idx) [uint16]
while {$supported_device_id(device_id_idx) != 0} {
move -2
set supported_device_id(device_id_idx) [uint16 -hex "Supported Device ID ${device_id_idx}"]
incr device_id_idx
set supported_device_id(device_id_idx) [uint16]
}
}
}
incr image_num
}
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