The "links" file is a newline separated list where each line is a "link name" followed by a "destination name" separated by a space character. For each line, SeaBIOS will consider each "link name" to be a CBFS file that has the contents found in the CBFS file with "destination name". Signed-off-by: Kevin O'Connor <kevin@koconnor.net> --- This patch may be useful for those using intel option roms where the same rom is used on a number of VGA devices with different vendor/device ids. With this patch, one can make a "links" file with the list of devices (eg, "pci8086,0a06.rom") that all point to the same physical rom (eg, "pci8086,0406.rom"). It's possible to implement this aliasing approach in a number of different ways. The approach taken in this patch is a single file with all the link names. This was done based on feedback that there could be 20 or more aliases for a single rom and creating individual CBFS files for each link would be unwieldy. That said, I'm not sure this is the best approach. I'm circulating it for comments. --- src/fw/coreboot.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/src/fw/coreboot.c b/src/fw/coreboot.c index df8fca8..270d01a 100644 --- a/src/fw/coreboot.c +++ b/src/fw/coreboot.c @@ -408,6 +408,40 @@ coreboot_cbfs_init(void) fhdr = (void*)ALIGN((u32)cfile->data + cfile->rawsize , be32_to_cpu(hdr->align)); } + + // Process CBFS links file. The links file is a newline separated + // file where each line has a "link name" and a destination name + // separated by a space character. + char *links = romfile_loadfile("links", NULL); + if (!links) + return; + char *p = links; + for (;;) { + char *linkname = p; + char *end = strchr(linkname, '\n'); + if (!end) + break; + *end = '\0'; + p = end + 1; + char *linkend = strchr(linkname, ' '); + if (!linkend || linkname == linkend) + continue; + *linkend = '\0'; + struct romfile_s *ufile = romfile_find(linkend+1); + if (!ufile) + continue; + struct cbfs_romfile_s *cufile + = container_of(ufile, struct cbfs_romfile_s, file); + struct cbfs_romfile_s *cfile = malloc_tmp(sizeof(*cfile)); + if (!cfile) { + warn_noalloc(); + break; + } + memcpy(cfile, cufile, sizeof(*cfile)); + strtcpy(cfile->file.name, linkname, sizeof(cfile->file.name)); + romfile_add(&cfile->file); + } + free(links); } struct cbfs_payload_segment { -- 1.8.5.3