41 строка
936 B
C
41 строка
936 B
C
/**
|
|
* machine_specific_memory_setup - Hook for machine specific memory setup.
|
|
*
|
|
* Description:
|
|
* This is included late in kernel/setup.c so that it can make
|
|
* use of all of the static functions.
|
|
**/
|
|
|
|
static char * __init machine_specific_memory_setup(void)
|
|
{
|
|
char *who;
|
|
|
|
|
|
who = "BIOS-e820";
|
|
|
|
/*
|
|
* Try to copy the BIOS-supplied E820-map.
|
|
*
|
|
* Otherwise fake a memory map; one section from 0k->640k,
|
|
* the next section from 1mb->appropriate_mem_k
|
|
*/
|
|
sanitize_e820_map(E820_MAP, &E820_MAP_NR);
|
|
if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0) {
|
|
unsigned long mem_size;
|
|
|
|
/* compare results from other methods and take the greater */
|
|
if (ALT_MEM_K < EXT_MEM_K) {
|
|
mem_size = EXT_MEM_K;
|
|
who = "BIOS-88";
|
|
} else {
|
|
mem_size = ALT_MEM_K;
|
|
who = "BIOS-e801";
|
|
}
|
|
|
|
e820.nr_map = 0;
|
|
add_memory_region(0, LOWMEMSIZE(), E820_RAM);
|
|
add_memory_region(HIGH_MEMORY, mem_size << 10, E820_RAM);
|
|
}
|
|
return who;
|
|
}
|