diff options
Diffstat (limited to 'sys/dev/pci/pci.c')
| -rw-r--r-- | sys/dev/pci/pci.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/sys/dev/pci/pci.c b/sys/dev/pci/pci.c index 255cc2e..5bf9b37 100644 --- a/sys/dev/pci/pci.c +++ b/sys/dev/pci/pci.c @@ -985,7 +985,14 @@ pci_add_map(device_t pcib, int b, int s, int f, int reg, else printf(", enabled\n"); } - + + /* + * This code theoretically does the right thing, but has + * undesirable side effects in some cases where + * peripherals respond oddly to having these bits + * enabled. Leave them alone by default. + */ +#ifdef PCI_ENABLE_IO_MODES /* Turn on resources that have been left off by a lazy BIOS */ if (type == SYS_RES_IOPORT && !pci_porten(pcib, b, s, f)) { cmd = PCIB_READ_CONFIG(pcib, b, s, f, PCIR_COMMAND, 2); @@ -997,6 +1004,12 @@ pci_add_map(device_t pcib, int b, int s, int f, int reg, cmd |= PCIM_CMD_MEMEN; PCIB_WRITE_CONFIG(pcib, b, s, f, PCIR_COMMAND, cmd, 2); } +#else + if (type == SYS_RES_IOPORT && !pci_porten(cfg)) + return 1; + if (type == SYS_RES_MEMORY && !pci_memen(cfg)) + return 1; +#endif resource_list_add(rl, type, reg, base, base + (1 << ln2size) - 1, |
