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/*
* linux/include/asm-arm/arch-nexuspci/io.h
*
* Copyright (C) 1997-1999 Russell King
* Copyright (C) 2000 FutureTV Labs Ltd.
*/
#ifndef __ASM_ARM_ARCH_IO_H
#define __ASM_ARM_ARCH_IO_H
#define IO_SPACE_LIMIT 0xffff
/*
* Translation of various region addresses to virtual addresses
*/
#define __io_pci(a) (PCIO_BASE + (a))
#if 1
#define __mem_pci(a) ((unsigned long)(a))
#define __mem_isa(a) (PCIMEM_BASE + (unsigned long)(a))
#else
extern __inline__ unsigned long ___mem_pci(unsigned long a)
{
/* PCI addresses must have been ioremapped */
if (a <= 0xc0000000 || a >= 0xe0000000)
*((int *)0) = 0;
return a;
}
extern __inline__ unsigned long ___mem_isa(unsigned long a)
{
if (a >= 16*1048576)
BUG();
return PCIMEM_BASE + a;
}
#define __mem_pci(a) ___mem_pci((unsigned long)(a))
#define __mem_isa(a) ___mem_isa((unsigned long)(a))
#endif
/* the following macro is depreciated */
#define __ioaddr(p) __io_pci(p)
/*
* Generic virtual read/write
*/
#define __arch_getb(a) (*(volatile unsigned char *)(a))
#define __arch_getl(a) (*(volatile unsigned int *)(a))
extern __inline__ unsigned int __arch_getw(unsigned long a)
{
unsigned int value;
__asm__ __volatile__("ldr%?h %0, [%1, #0] @ getw"
: "=&r" (value)
: "r" (a));
return value;
}
#define __arch_putb(v,a) (*(volatile unsigned char *)(a) = (v))
#define __arch_putl(v,a) (*(volatile unsigned int *)(a) = (v))
extern __inline__ void __arch_putw(unsigned int value, unsigned long a)
{
__asm__ __volatile__("str%?h %0, [%1, #0] @ putw"
: : "r" (value), "r" (a));
}
#define inb(p) __arch_getb(__io_pci(p))
#define inw(p) __arch_getw(__io_pci(p))
#define inl(p) __arch_getl(__io_pci(p))
#define outb(v,p) __arch_putb(v,__io_pci(p))
#define outw(v,p) __arch_putw(v,__io_pci(p))
#define outl(v,p) __arch_putl(v,__io_pci(p))
/*
* ioremap support - validate a PCI memory address,
* and convert a PCI memory address to a physical
* address for the page tables.
*/
#define valid_ioaddr(off,sz) ((off) < 0x80000000 && (off) + (sz) <= 0x80000000)
#define io_to_phys(off) ((off) + PLX_MEM_START)
/*
* ioremap takes a PCI memory address, as specified in
* linux/Documentation/IO-mapping.txt
*/
#define __arch_ioremap(off,size,nocache) \
({ \
unsigned long _off = (off), _size = (size); \
void *_ret = (void *)0; \
if (valid_ioaddr(_off, _size)) \
_ret = __ioremap(io_to_phys(_off), _size, 0); \
_ret; \
})
#endif
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