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https://github.com/AsahiLinux/u-boot
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44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
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/* originally from linux source (asm-ppc/io.h).
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* Sanity added by Rob Taylor, Flying Pig Systems, 2000
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*/
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#ifndef _PCI_IO_H_
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#define _PCI_IO_H_
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#include "io.h"
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#define pci_read_le16(addr, dest) \
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__asm__ __volatile__("lhbrx %0,0,%1" : "=r" (dest) : \
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"r" (addr), "m" (*addr));
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#define pci_write_le16(addr, val) \
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__asm__ __volatile__("sthbrx %1,0,%2" : "=m" (*addr) : \
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"r" (val), "r" (addr));
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#define pci_read_le32(addr, dest) \
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__asm__ __volatile__("lwbrx %0,0,%1" : "=r" (dest) : \
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"r" (addr), "m" (*addr));
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#define pci_write_le32(addr, val) \
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__asm__ __volatile__("stwbrx %1,0,%2" : "=m" (*addr) : \
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"r" (val), "r" (addr));
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#define pci_readb(addr,b) ((b) = *(volatile u8 *) (addr))
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#define pci_writeb(b,addr) ((*(volatile u8 *) (addr)) = (b))
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#if !defined(__BIG_ENDIAN)
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#define pci_readw(addr,b) ((b) = *(volatile u16 *) (addr))
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#define pci_readl(addr,b) ((b) = *(volatile u32 *) (addr))
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#define pci_writew(b,addr) ((*(volatile u16 *) (addr)) = (b))
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#define pci_writel(b,addr) ((*(volatile u32 *) (addr)) = (b))
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#else
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#define pci_readw(addr,b) pci_read_le16((volatile u16 *)(addr),(b))
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#define pci_readl(addr,b) pci_read_le32((volatile u32 *)(addr),(b))
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#define pci_writew(b,addr) pci_write_le16((volatile u16 *)(addr),(b))
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#define pci_writel(b,addr) pci_write_le32((volatile u32 *)(addr),(b))
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#endif
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#endif /* _PCI_IO_H_ */
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