diff options
Diffstat (limited to 'include/asm-x86_64/pci-direct.h')
-rw-r--r-- | include/asm-x86_64/pci-direct.h | 42 |
1 files changed, 5 insertions, 37 deletions
diff --git a/include/asm-x86_64/pci-direct.h b/include/asm-x86_64/pci-direct.h index 036b6ca5b53b..eba9cb471df3 100644 --- a/include/asm-x86_64/pci-direct.h +++ b/include/asm-x86_64/pci-direct.h | |||
@@ -2,47 +2,15 @@ | |||
2 | #define ASM_PCI_DIRECT_H 1 | 2 | #define ASM_PCI_DIRECT_H 1 |
3 | 3 | ||
4 | #include <linux/types.h> | 4 | #include <linux/types.h> |
5 | #include <asm/io.h> | ||
6 | 5 | ||
7 | /* Direct PCI access. This is used for PCI accesses in early boot before | 6 | /* Direct PCI access. This is used for PCI accesses in early boot before |
8 | the PCI subsystem works. */ | 7 | the PCI subsystem works. */ |
9 | 8 | ||
10 | #define PDprintk(x...) | 9 | extern u32 read_pci_config(u8 bus, u8 slot, u8 func, u8 offset); |
10 | extern u8 read_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset); | ||
11 | extern u16 read_pci_config_16(u8 bus, u8 slot, u8 func, u8 offset); | ||
12 | extern void write_pci_config(u8 bus, u8 slot, u8 func, u8 offset, u32 val); | ||
11 | 13 | ||
12 | static inline u32 read_pci_config(u8 bus, u8 slot, u8 func, u8 offset) | 14 | extern int early_pci_allowed(void); |
13 | { | ||
14 | u32 v; | ||
15 | outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8); | ||
16 | v = inl(0xcfc); | ||
17 | if (v != 0xffffffff) | ||
18 | PDprintk("%x reading 4 from %x: %x\n", slot, offset, v); | ||
19 | return v; | ||
20 | } | ||
21 | |||
22 | static inline u8 read_pci_config_byte(u8 bus, u8 slot, u8 func, u8 offset) | ||
23 | { | ||
24 | u8 v; | ||
25 | outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8); | ||
26 | v = inb(0xcfc + (offset&3)); | ||
27 | PDprintk("%x reading 1 from %x: %x\n", slot, offset, v); | ||
28 | return v; | ||
29 | } | ||
30 | |||
31 | static inline u16 read_pci_config_16(u8 bus, u8 slot, u8 func, u8 offset) | ||
32 | { | ||
33 | u16 v; | ||
34 | outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8); | ||
35 | v = inw(0xcfc + (offset&2)); | ||
36 | PDprintk("%x reading 2 from %x: %x\n", slot, offset, v); | ||
37 | return v; | ||
38 | } | ||
39 | |||
40 | static inline void write_pci_config(u8 bus, u8 slot, u8 func, u8 offset, | ||
41 | u32 val) | ||
42 | { | ||
43 | PDprintk("%x writing to %x: %x\n", slot, offset, val); | ||
44 | outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8); | ||
45 | outl(val, 0xcfc); | ||
46 | } | ||
47 | 15 | ||
48 | #endif | 16 | #endif |