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Viewing changes to grub-core/kern/i386/pc/mmap.c

  • Committer: Bazaar Package Importer
  • Author(s): Colin Watson
  • Date: 2011-01-11 17:11:44 UTC
  • mto: (17.6.24 experimental)
  • mto: This revision was merged to the branch mainline in revision 100.
  • Revision ID: james.westby@ubuntu.com-20110111171144-o2h6luxzei5fivmf
Tags: upstream-1.99~20110111
Import upstream version 1.99~20110111

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grub-core/kern/i386/pc/mmap.c
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/*
 
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 *
 
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 * grub_get_conv_memsize(i) :  return the conventional memory size in KB.
 
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 *      BIOS call "INT 12H" to get conventional memory size
 
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 *      The return value in AX.
 
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 */
 
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static inline grub_uint16_t
 
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grub_get_conv_memsize (void)
 
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{
 
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  struct grub_bios_int_registers regs;
 
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  regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
 
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  grub_bios_interrupt (0x12, &regs);
 
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  return regs.eax & 0xffff;
 
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}
 
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/*
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 * grub_get_ext_memsize() :  return the extended memory size in KB.
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 *      BIOS call "INT 15H, AH=88H" to get extended memory size
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 *      The return value in AX.
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    {
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      grub_uint32_t eisa_mmap = grub_get_eisa_mmap ();
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      if (hook (0x0, ((grub_uint32_t) grub_get_conv_memsize ()) << 10,
 
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                GRUB_MEMORY_AVAILABLE))
 
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        return 0;
 
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      if (eisa_mmap)
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        {
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          if (hook (0x100000, (eisa_mmap & 0xFFFF) << 10,
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            hook (0x1000000, eisa_mmap & ~0xFFFF, GRUB_MEMORY_AVAILABLE);
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        }
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      else
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        hook (0x100000, grub_get_ext_memsize () << 10, GRUB_MEMORY_AVAILABLE);
 
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        hook (0x100000, ((grub_uint32_t) grub_get_ext_memsize ()) << 10,
 
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              GRUB_MEMORY_AVAILABLE);
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    }
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  return 0;