/*
* Read configuration space register
*/
uint32_t
pci_cfgregread(int bus, int slot, int func, int reg, int bytes)
{
/*
* Some BIOS writers seem to want to ignore the spec and put
* 0 in the intline rather than 255 to indicate none. Some use
* numbers in the range 128-254 to indicate something strange and
* apparently undocumented anywhere. Assume these are completely
* bogus and map them to 255, which means "none".
*/
if (reg == PCIR_INTLINE && bytes == 1) {
uint32_t line;
line = pci_docfgregread(bus, slot, func, PCIR_INTLINE, 1);
if (line == 0 || line >= 128)
return (PCI_INVALID_IRQ);
return line;
}
return pci_docfgregread(bus, slot, func, reg, bytes);
}
/*
* Read configuration space register
*/
u_int32_t
pci_cfgregread(int bus, int slot, int func, int reg, int bytes)
{
uint32_t line;
/*
* Some BIOS writers seem to want to ignore the spec and put
* 0 in the intline rather than 255 to indicate none. Some use
* numbers in the range 128-254 to indicate something strange and
* apparently undocumented anywhere. Assume these are completely bogus
* and map them to 255, which the rest of the PCI code recognizes as
* as an invalid IRQ.
*/
if (reg == PCIR_INTLINE && bytes == 1) {
line = pci_docfgregread(bus, slot, func, PCIR_INTLINE, 1);
if (line == 0 || line >= 128)
line = PCI_INVALID_IRQ;
return (line);
}
return (pci_docfgregread(bus, slot, func, reg, bytes));
}
