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Add VBE PM interface

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2010-09-16 00:37:30 +02:00
parent b09cf083a0
commit 0b37526a5a
3 changed files with 32 additions and 4 deletions
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26
grub-core/video/i386/pc/vbe.c
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@ -248,6 +248,32 @@ grub_vbe_bios_get_display_start (grub_uint32_t *x,
return regs.eax & 0xffff;
}
/* Call VESA BIOS 0x4f0a. */
grub_vbe_status_t
grub_vbe_bios_get_pm_interface (grub_uint16_t *segment, grub_uint16_t *offset,
grub_uint16_t *length)
{
struct grub_bios_int_registers regs;
regs.eax = 0x4f0a;
regs.ebx = 0x0000;
regs.flags = GRUB_CPU_INT_FLAGS_DEFAULT;
grub_bios_interrupt (0x10, &regs);
if ((regs.eax & 0xffff) != GRUB_VBE_STATUS_OK)
{
*segment = 0;
*offset = 0;
*length = 0;
}
*segment = regs.es & 0xffff;
*offset = regs.edi & 0xffff;
*length = regs.ecx & 0xffff;
return regs.eax & 0xffff;
}
grub_err_t
grub_vbe_probe (struct grub_vbe_info_block *info_block)
{