pci-direct.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:1k
- #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);
- PDprintk("%x reading from %x: %xn", 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: %xn", slot, offset, val);
- outl(0x80000000 | (bus<<16) | (slot<<11) | (func<<8) | offset, 0xcf8);
- outl(val, 0xcfc);
- }
- #endif