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  • Committer: Bazaar Package Importer
  • Author(s): Bastian Blank
  • Date: 2010-05-06 15:47:38 UTC
  • mto: (1.3.1) (15.1.1 sid) (4.1.1 experimental)
  • mto: This revision was merged to the branch mainline in revision 3.
  • Revision ID: james.westby@ubuntu.com-20100506154738-agoz0rlafrh1fnq7
Tags: upstream-4.0.0
Import upstream version 4.0.0

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tools/xc/lib/xc_private.c
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/******************************************************************************
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 * xc_private.c
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 * 
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 * Helper functions for the rest of the library.
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 */
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#include "xc_private.h"
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int init_pfn_mapper(void)
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{
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    return open("/dev/mem", O_RDWR);
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}
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int close_pfn_mapper(int pm_handle)
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{
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    return close(pm_handle);
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}
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void *map_pfn(int pm_handle, unsigned long pfn)
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{
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    void *vaddr = mmap(NULL, PAGE_SIZE, PROT_READ|PROT_WRITE,
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                       MAP_SHARED, pm_handle, pfn << PAGE_SHIFT);
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    if ( vaddr == MAP_FAILED )
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        return NULL;
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    return vaddr;
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}
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void unmap_pfn(int pm_handle, void *vaddr)
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{
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    (void)munmap(vaddr, PAGE_SIZE);
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}