2
0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-23 12:43:55 +08:00
linux-next/include/asm-x86_64/pci-direct.h
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

49 lines
1.2 KiB
C

#ifndef ASM_PCI_DIRECT_H
#define ASM_PCI_DIRECT_H 1
#include <linux/types.h>
#include <asm/io.h>
/* Direct PCI access. This is used for PCI accesses in early boot before
the PCI subsystem works. */
#define PDprintk(x...)
static inline u32 read_pci_config(u8 bus, u8 slot, u8 func, u8 offset)
{
u32 v;
outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8);
v = inl(0xcfc);
if (v != 0xffffffff)
PDprintk("%x reading 4 from %x: %x\n", slot, offset, v);
return v;
}
static inline u8 read_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset)
{
u8 v;
outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8);
v = inb(0xcfc + (offset&3));
PDprintk("%x reading 1 from %x: %x\n", slot, offset, v);
return v;
}
static inline u16 read_pci_config_16(u8 bus, u8 slot, u8 func, u8 offset)
{
u16 v;
outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8);
v = inw(0xcfc + (offset&2));
PDprintk("%x reading 2 from %x: %x\n", slot, offset, v);
return v;
}
static inline void write_pci_config(u8 bus, u8 slot, u8 func, u8 offset,
u32 val)
{
PDprintk("%x writing to %x: %x\n", slot, offset, val);
outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8);
outl(val, 0xcfc);
}
#endif