2 * linux/include/asm-arm/arch-nexuspci/io.h
4 * Copyright (C) 1997-1999 Russell King
5 * Copyright (C) 2000 FutureTV Labs Ltd.
7 #ifndef __ASM_ARM_ARCH_IO_H
8 #define __ASM_ARM_ARCH_IO_H
10 #define IO_SPACE_LIMIT 0xffff
13 * Translation of various region addresses to virtual addresses
15 #define __io(a) (PCIO_BASE + (a))
17 #define __mem_pci(a) ((unsigned long)(a))
18 #define __mem_isa(a) (PCIMEM_BASE + (unsigned long)(a))
21 static inline unsigned long ___mem_pci(unsigned long a)
23 /* PCI addresses must have been ioremapped */
24 if (a <= 0xc0000000 || a >= 0xe0000000)
29 static inline unsigned long ___mem_isa(unsigned long a)
33 return PCIMEM_BASE + a;
35 #define __mem_pci(a) ___mem_pci((unsigned long)(a))
36 #define __mem_isa(a) ___mem_isa((unsigned long)(a))
40 * Generic virtual read/write
42 #define __arch_getw(a) (*(volatile unsigned short *)(a))
43 #define __arch_putw(v,a) (*(volatile unsigned short *)(a) = (v))
46 * ioremap support - validate a PCI memory address,
47 * and convert a PCI memory address to a physical
48 * address for the page tables.
50 #define iomem_valid_addr(iomem,sz) \
51 ((iomem) < 0x80000000 && (iomem) + (sz) <= 0x80000000)
52 #define iomem_to_phys(iomem) ((iomem) + PLX_MEM_START)