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Also hide base memory region from E820 map.

pull/1/head
Michael Brown 2006-05-25 00:10:58 +00:00
parent 89da833c5d
commit d82f71efd0
1 changed files with 7 additions and 2 deletions
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9
src/arch/i386/firmware/pcbios/hidemem.c
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@ -50,6 +50,7 @@ extern struct segoff __text16 ( int15_vector );
*/ */
enum { enum {
TEXT = 0, TEXT = 0,
BASEMEM,
}; };
/** /**
@ -59,6 +60,7 @@ enum {
*/ */
struct hidden_region __data16_array ( hidden_regions, [] ) = { struct hidden_region __data16_array ( hidden_regions, [] ) = {
[TEXT] = { 0, 0 }, [TEXT] = { 0, 0 },
[BASEMEM] = { 0, ( 640 * 1024 ) },
{ 0, 0, } /* Terminator */ { 0, 0, } /* Terminator */
}; };
#define hidden_regions __use_data16 ( hidden_regions ) #define hidden_regions __use_data16 ( hidden_regions )
@ -72,10 +74,13 @@ struct hidden_region __data16_array ( hidden_regions, [] ) = {
void hide_etherboot ( void ) { void hide_etherboot ( void ) {
hidden_regions[TEXT].start = virt_to_phys ( _text ); hidden_regions[TEXT].start = virt_to_phys ( _text );
hidden_regions[TEXT].end = virt_to_phys ( _end ); hidden_regions[TEXT].end = virt_to_phys ( _end );
hidden_regions[BASEMEM].start = ( rm_cs << 4 );
DBG ( "Hiding [%lx,%lx)\n", DBG ( "Hiding [%lx,%lx) and [%lx,%lx)\n",
( unsigned long ) hidden_regions[TEXT].start, ( unsigned long ) hidden_regions[TEXT].start,
( unsigned long ) hidden_regions[TEXT].end ); ( unsigned long ) hidden_regions[TEXT].end,
( unsigned long ) hidden_regions[BASEMEM].start,
( unsigned long ) hidden_regions[BASEMEM].end );
hook_bios_interrupt ( 0x15, ( unsigned int ) int15, hook_bios_interrupt ( 0x15, ( unsigned int ) int15,
&int15_vector ); &int15_vector );