mirror of https://gitee.com/openkylin/linux.git
37 lines
750 B
C
37 lines
750 B
C
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#ifndef __UM_IO_H
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#define __UM_IO_H
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#include "asm/page.h"
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#define IO_SPACE_LIMIT 0xdeadbeef /* Sure hope nothing uses this */
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static inline int inb(unsigned long i) { return(0); }
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static inline void outb(char c, unsigned long i) { }
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/*
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* Change virtual addresses to physical addresses and vv.
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* These are pretty trivial
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*/
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static inline unsigned long virt_to_phys(volatile void * address)
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{
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return __pa((void *) address);
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}
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static inline void * phys_to_virt(unsigned long address)
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{
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return __va(address);
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}
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/*
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* Convert a physical pointer to a virtual kernel pointer for /dev/mem
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* access
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*/
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#define xlate_dev_mem_ptr(p) __va(p)
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/*
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* Convert a virtual cached pointer to an uncached pointer
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*/
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#define xlate_dev_kmem_ptr(p) p
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#endif
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