46 lines
830 B
C
46 lines
830 B
C
|
#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 */
|