1 #include <linux/kernel.h>
2 #include <asm/pci-direct.h>
5 /* Direct PCI access. This is used for PCI accesses in early boot before
6 the PCI subsystem works. */
10 u32 read_pci_config(u8 bus, u8 slot, u8 func, u8 offset)
13 outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8);
16 PDprintk("%x reading 4 from %x: %x\n", slot, offset, v);
20 u8 read_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset)
23 outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8);
24 v = inb(0xcfc + (offset&3));
25 PDprintk("%x reading 1 from %x: %x\n", slot, offset, v);
29 u16 read_pci_config_16(u8 bus, u8 slot, u8 func, u8 offset)
32 outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8);
33 v = inw(0xcfc + (offset&2));
34 PDprintk("%x reading 2 from %x: %x\n", slot, offset, v);
38 void write_pci_config(u8 bus, u8 slot, u8 func, u8 offset,
41 PDprintk("%x writing to %x: %x\n", slot, offset, val);
42 outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8);