[mromprefix] Allow for .mrom images larger than 128kB
The .mrom payload has a code type of 0xff and so the initialisation length field (single byte at offset 0x02) does not need to be present. Use only the PCI header's image length field, which allows the .mrom payload to be up to 32MB in size. Inspired-by: Swift Geek <swiftgeek@gmail.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
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@ -196,7 +196,7 @@ find_mem_bar:
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movl %eax, %esi
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addr32 es movzbl 2(%esi), %ecx
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shll $7, %ecx
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addr32 es movzbl 2(%esi,%ecx,4), %edx
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addr32 es movzwl mpciheader_image_length(%esi,%ecx,4), %edx
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shll $7, %edx
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addl %edx, %ecx
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addr32 es rep movsl
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@ -463,20 +463,12 @@ pci_set_mem_access:
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.org 0x00
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mromheader:
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.word 0xaa55 /* BIOS extension signature */
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mromheader_size: .byte 0 /* Size in 512-byte blocks */
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.org 0x18
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.word mpciheader
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.org 0x1a
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.word 0
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.size mromheader, . - mromheader
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.section ".zinfo.fixup", "a", @progbits /* Compressor fixups */
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.ascii "APPB"
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.long mromheader_size
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.long 512
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.long 0
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.previous
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mpciheader:
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.ascii "PCIR" /* Signature */
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.word pci_vendor_id /* Vendor identification */
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