1da177e4c3
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!
49 lines
1.2 KiB
C
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
|