xCAT/xNBA
2
0
Fork 0
mirror of https://github.com/xcat2/xNBA.git synced 2025-01-18 21:43:14 +00:00
Code Issues Projects Releases Wiki Activity

Allow external code to update hidden memory regions.

Browse Source
This commit is contained in:
Michael Brown 2007-01-12 03:13:04 +00:00
parent 687c1e3227
commit 859da6bd32
2 changed files with 47 additions and 25 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
src/arch/i386/firmware/pcbios/hidemem.c
View File

@ -17,22 +17,7 @@
#include <realmode.h>
#include <biosint.h>
/**
* A hidden region of Etherboot
*
* This represents a region that will be edited out of the system's
* memory map.
*
* This structure is accessed by assembly code, so must not be
* changed.
*/
struct hidden_region {
/* Physical start address */
uint32_t start;
/* Physical end address */
uint32_t end;
};
#include <gpxe/hidemem.h>
/* Linker-defined symbols */
extern char _text[];
@ -45,14 +30,6 @@ extern void int15();
extern struct segoff __text16 ( int15_vector );
#define int15_vector __use_text16 ( int15_vector )
/**
* Unique IDs for hidden regions
*/
enum {
TEXT = 0,
BASEMEM,
};
/**
* List of hidden regions
*
@ -61,9 +38,9 @@ enum {
struct hidden_region __data16_array ( hidden_regions, [] ) = {
[TEXT] = { 0, 0 },
[BASEMEM] = { 0, ( 640 * 1024 ) },
[EXTMEM] = { 0, 0 },
{ 0, 0, } /* Terminator */
};
#define hidden_regions __use_data16 ( hidden_regions )
/**
* Hide Etherboot

45
src/include/gpxe/hidemem.h Normal file
View File

@ -0,0 +1,45 @@
#ifndef _GPXE_HIDEMEM_H
#define _GPXE_HIDEMEM_H
/**
* @file
*
* Hidden memory regions
*
*/
/**
* A hidden region of Etherboot
*
* This represents a region that will be edited out of the system's
* memory map.
*
* This structure is accessed by assembly code, so must not be
* changed.
*/
struct hidden_region {
/* Physical start address */
physaddr_t start;
/* Physical end address */
physaddr_t end;
};
/**
* Unique IDs for hidden regions
*/
enum {
TEXT = 0,
BASEMEM,
EXTMEM,
};
extern struct hidden_region __data16_array ( hidden_regions, [] );
#define hidden_regions __use_data16 ( hidden_regions )
static inline void hide_region ( unsigned int region,
physaddr_t start, physaddr_t end ) {
hidden_regions[region].start = start;
hidden_regions[region].end = end;
}
#endif /* _GPXE_HIDEMEM_H */