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/*
* linux/include/asm-arm/arch-l7200/io.h
*
* Copyright (C) 2000 Steve Hill (sjhill@cotw.com)
*
* Changelog:
* 03-21-2000 SJH Created from linux/include/asm-arm/arch-nexuspci/io.h
* 08-31-2000 SJH Added in IO functions necessary for new drivers
*/
#ifndef __ASM_ARM_ARCH_IO_H
#define __ASM_ARM_ARCH_IO_H
#include <asm/hardware.h>
#define IO_SPACE_LIMIT 0xffffffff
/*
* There are not real ISA nor PCI buses, so we fake it.
*/
#define __io_pci(a) ((void __iomem *)(PCIO_BASE + (a)))
#define __mem_pci(a) (a)
#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))
static inline unsigned int __arch_getw(unsigned long a)
{
unsigned int value;
__asm__ __volatile__("ldrh %0, [%1, #0] @ getw"
: "=&r" (value)
: "r" (a) : "cc");
return value;
}
#define __arch_putb(v,a) (*(volatile unsigned char *)(a) = (v))
#define __arch_putl(v,a) (*(volatile unsigned int *)(a) = (v))
static inline void __arch_putw(unsigned int value, unsigned long a)
{
__asm__ __volatile__("strh %0, [%1, #0] @ putw"
: : "r" (value), "r" (a) : "cc");
}
/*
* Translated address IO functions
*
* IO address has already been translated to a virtual address
*/
#define outb_t(v,p) (*(volatile unsigned char *)(p) = (v))
#define inb_t(p) (*(volatile unsigned char *)(p))
#define outw_t(v,p) (*(volatile unsigned int *)(p) = (v))
#define inw_t(p) (*(volatile unsigned int *)(p))
#define outl_t(v,p) (*(volatile unsigned long *)(p) = (v))
#define inl_t(p) (*(volatile unsigned long *)(p))
/*
* FIXME - These are to allow for linking. On all the other
* ARM platforms, the entire IO space is contiguous.
* The 7200 has three separate IO spaces. The below
* macros will eventually become more involved. Use
* with caution and don't be surprised by kernel oopses!!!
*/
#define inb(p) inb_t(p)
#define inw(p) inw_t(p)
#define inl(p) inl_t(p)
#define outb(v,p) outb_t(v,p)
#define outw(v,p) outw_t(v,p)
#define outl(v,p) outl_t(v,p)
#endif
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