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Fix a couple of bugs in host_pcib_get_busno():

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- If a PCI device is not present, then a 32-bit read_config() is going to
  return 0xffffffff not 0xffff.
- For the 82454NX chipset, the MIOC that we read the bus numbers of the
  various host-PCI bridges from is at function (slot) 0x10 not 0x0.

Approved by:	re (rwatson)
This commit is contained in:
John Baldwin 2002-11-25 21:53:14 +00:00
parent 9ff4a5cf37
commit 1bbf246462
1 changed files with 5 additions and 5 deletions
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10
sys/dev/pci/pci_pci.c
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@ -457,7 +457,7 @@ host_pcib_get_busno(pci_read_config_fn read_config, int bus, int slot, int func,
u_int32_t id;
id = read_config(bus, slot, func, PCIR_DEVVENDOR, 4);
if (id == 0xffff)
if (id == 0xffffffff)
return (0);
switch (id) {
@ -488,19 +488,19 @@ host_pcib_get_busno(pci_read_config_fn read_config, int bus, int slot, int func,
switch (slot) {
case 0x12:
/* Intel 82454NX PXB#0, Bus#A */
*busnum = read_config(bus, 0, func, 0xd0, 1);
*busnum = read_config(bus, 0x10, func, 0xd0, 1);
break;
case 0x13:
/* Intel 82454NX PXB#0, Bus#B */
*busnum = read_config(bus, 0, func, 0xd1, 1) + 1;
*busnum = read_config(bus, 0x10, func, 0xd1, 1) + 1;
break;
case 0x14:
/* Intel 82454NX PXB#1, Bus#A */
*busnum = read_config(bus, 0, func, 0xd3, 1);
*busnum = read_config(bus, 0x10, func, 0xd3, 1);
break;
case 0x15:
/* Intel 82454NX PXB#1, Bus#B */
*busnum = read_config(bus, 0, func, 0xd4, 1) + 1;
*busnum = read_config(bus, 0x10, func, 0xd4, 1) + 1;
break;
}
break;