PCI device BARs of all types had only bits 1:0 cleared while reading the address. That was correct for IO BARs, but failed to mask bit 3:2 for MEM BARs, resulting in odd offsets for prefetchable MEM BARs and for 64-bit capable MEM BARs. Mask the correct number of bits for all types of BARs and add some debug printing about BAR type.
Signed-off-by: Carl-Daniel Hailfinger <[email protected]> Index: flashrom-pci_bar_masking/pcidev.c =================================================================== --- flashrom-pci_bar_masking/pcidev.c (Revision 920) +++ flashrom-pci_bar_masking/pcidev.c (Arbeitskopie) @@ -32,6 +32,7 @@ struct pcidev_status *devs) { int i; + /* FIXME: 64 bit memory BARs need a 64 bit addr. */ uint32_t addr; for (i = 0; devs[i].device_name != NULL; i++) { @@ -42,12 +43,27 @@ * Don't use dev->base_addr[x] (as value for 'bar'), won't * work on older libpci. */ - addr = pci_read_long(dev, bar) & ~0x03; + addr = pci_read_long(dev, bar); printf("Found \"%s %s\" (%04x:%04x, BDF %02x:%02x.%x).\n", devs[i].vendor_name, devs[i].device_name, dev->vendor_id, dev->device_id, dev->bus, dev->dev, dev->func); + msg_pdbg("Requested BAR is %s", (addr & 0x1) ? "IO" : "MEM"); + if (addr & 0x1) { + /* Mask off IO space indicator and reserved bit. */ + msg_pdbg("\n"); + addr &= ~0x3; + } else { + msg_pdbg(", %sbit, %sprefetchable\n", + ((addr & 0x6) == 0x0) ? "32" : + (((addr & 0x6) == 0x4) ? "64" : "reserved"), + (addr & 0x8) ? "" : "not "); + /* Mask off Mem space indicator, 32/64bit type indicator + * and Prefetchable indicator. + */ + addr &= ~0xf; + } if (devs[i].status == NT) { printf("===\nThis PCI device is UNTESTED. Please " -- "I do consider assignment statements and pointer variables to be among computer science's most valuable treasures." -- Donald E. Knuth _______________________________________________ flashrom mailing list [email protected] http://www.flashrom.org/mailman/listinfo/flashrom
