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[PATCH] Remove non e820 fallbacks in high level code

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Drop support for non e820 BIOS calls to get the memory map.

The boot assembler code still has some support, but not the C code now.

Signed-off-by: Andi Kleen <ak@suse.de>
This commit is contained in:
Andi Kleen 2006-09-26 10:52:37 +02:00 committed by Andi Kleen
parent b3698c03eb
commit 8380aabb99
2 changed files with 9 additions and 23 deletions
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28
arch/x86_64/kernel/e820.c
View file

@ -536,10 +536,14 @@ static int __init copy_e820_map(struct e820entry * biosmap, int nr_map)
return 0;
}
void early_panic(char *msg)
{
early_printk(msg);
panic(msg);
}
void __init setup_memory_region(void)
{
char *who = "BIOS-e820";
/*
* Try to copy the BIOS-supplied E820-map.
*
@ -547,24 +551,10 @@ void __init setup_memory_region(void)
* 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);
}
if (copy_e820_map(E820_MAP, E820_MAP_NR) < 0)
early_panic("Cannot find a valid memory map");
printk(KERN_INFO "BIOS-provided physical RAM map:\n");
e820_print_map(who);
e820_print_map("BIOS-e820");
}
static int __init parse_memopt(char *p)

4
include/asm-x86_64/e820.h
View file

@ -22,10 +22,6 @@
#define E820_ACPI 3 /* usable as RAM once ACPI tables have been read */
#define E820_NVS 4
#define HIGH_MEMORY (1024*1024)
#define LOWMEMSIZE() (0x9f000)
#ifndef __ASSEMBLY__
struct e820entry {
u64 addr; /* start of memory segment */