mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-16 16:54:20 +08:00
ea1eae75eb
Add implementations of the write* and __raw_write* functions. __raw_writel is needed by lib/iocopy.c, which shouldn't be used in UML, but which is unconditionally linked in anyway. Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
53 lines
1.2 KiB
C
53 lines
1.2 KiB
C
#ifndef __UM_IO_H
|
|
#define __UM_IO_H
|
|
|
|
#include "asm/page.h"
|
|
|
|
#define IO_SPACE_LIMIT 0xdeadbeef /* Sure hope nothing uses this */
|
|
|
|
static inline int inb(unsigned long i) { return(0); }
|
|
static inline void outb(char c, unsigned long i) { }
|
|
|
|
/*
|
|
* Change virtual addresses to physical addresses and vv.
|
|
* These are pretty trivial
|
|
*/
|
|
static inline unsigned long virt_to_phys(volatile void * address)
|
|
{
|
|
return __pa((void *) address);
|
|
}
|
|
|
|
static inline void * phys_to_virt(unsigned long address)
|
|
{
|
|
return __va(address);
|
|
}
|
|
|
|
/*
|
|
* Convert a physical pointer to a virtual kernel pointer for /dev/mem
|
|
* access
|
|
*/
|
|
#define xlate_dev_mem_ptr(p) __va(p)
|
|
|
|
/*
|
|
* Convert a virtual cached pointer to an uncached pointer
|
|
*/
|
|
#define xlate_dev_kmem_ptr(p) p
|
|
|
|
static inline void writeb(unsigned char b, volatile void __iomem *addr)
|
|
{
|
|
*(volatile unsigned char __force *) addr = b;
|
|
}
|
|
static inline void writew(unsigned short b, volatile void __iomem *addr)
|
|
{
|
|
*(volatile unsigned short __force *) addr = b;
|
|
}
|
|
static inline void writel(unsigned int b, volatile void __iomem *addr)
|
|
{
|
|
*(volatile unsigned int __force *) addr = b;
|
|
}
|
|
#define __raw_writeb writeb
|
|
#define __raw_writew writew
|
|
#define __raw_writel writel
|
|
|
|
#endif
|