include/asm-ppc/pci_io.h

   1 /* originally from linux source (asm-ppc/io.h).
   2  * Sanity added by Rob Taylor, Flying Pig Systems, 2000
   3  */
   4 #ifndef _PCI_IO_H_
   5 #define _PCI_IO_H_
   6
   7 #include "io.h"
   8
   9
  10 #define pci_read_le16(addr, dest) \
  11     __asm__ __volatile__("lhbrx %0,0,%1" : "=r" (dest) : \
  12                   "r" (addr), "m" (*addr));
  13
  14 #define pci_write_le16(addr, val) \
  15     __asm__ __volatile__("sthbrx %1,0,%2" : "=m" (*addr) : \
  16                   "r" (val), "r" (addr));
  17
  18
  19 #define pci_read_le32(addr, dest) \
  20     __asm__ __volatile__("lwbrx %0,0,%1" : "=r" (dest) : \
  21                  "r" (addr), "m" (*addr));
  22
  23 #define pci_write_le32(addr, val) \
  24 __asm__ __volatile__("stwbrx %1,0,%2" : "=m" (*addr) : \
  25                  "r" (val), "r" (addr));
  26
  27 #define pci_readb(addr,b) ((b) = *(volatile u8 *) (addr))
  28 #define pci_writeb(b,addr) ((*(volatile u8 *) (addr)) = (b))
  29
  30 #if !defined(__BIG_ENDIAN)
  31 #define pci_readw(addr,b) ((b) = *(volatile u16 *) (addr))
  32 #define pci_readl(addr,b) ((b) = *(volatile u32 *) (addr))
  33 #define pci_writew(b,addr) ((*(volatile u16 *) (addr)) = (b))
  34 #define pci_writel(b,addr) ((*(volatile u32 *) (addr)) = (b))
  35 #else
  36 #define pci_readw(addr,b) pci_read_le16((volatile u16 *)(addr),(b))
  37 #define pci_readl(addr,b) pci_read_le32((volatile u32 *)(addr),(b))
  38 #define pci_writew(b,addr) pci_write_le16((volatile u16 *)(addr),(b))
  39 #define pci_writel(b,addr) pci_write_le32((volatile u32 *)(addr),(b))
  40 #endif
  41
  42
  43 #endif /* _PCI_IO_H_ */