130 lines
2.9 KiB
C
130 lines
2.9 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2005 MIPS Technologies, Inc. All rights reserved.
|
||
|
|
*
|
||
|
|
* This program is free software; you can distribute it and/or modify it
|
||
|
|
* under the terms of the GNU General Public License (Version 2) as
|
||
|
|
* published by the Free Software Foundation.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope it will be useful, but WITHOUT
|
||
|
|
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||
|
|
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
|
||
|
|
* for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License along
|
||
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
||
|
|
* 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
#include <linux/init.h>
|
||
|
|
#include <linux/mm.h>
|
||
|
|
#include <linux/bootmem.h>
|
||
|
|
|
||
|
|
#include <asm/bootinfo.h>
|
||
|
|
#include <asm/page.h>
|
||
|
|
|
||
|
|
#include <asm/mips-boards/prom.h>
|
||
|
|
|
||
|
|
/*#define DEBUG*/
|
||
|
|
|
||
|
|
enum simmem_memtypes {
|
||
|
|
simmem_reserved = 0,
|
||
|
|
simmem_free,
|
||
|
|
};
|
||
|
|
struct prom_pmemblock mdesc[PROM_MAX_PMEMBLOCKS];
|
||
|
|
|
||
|
|
#ifdef DEBUG
|
||
|
|
static char *mtypes[3] = {
|
||
|
|
"SIM reserved memory",
|
||
|
|
"SIM free memory",
|
||
|
|
};
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* References to section boundaries */
|
||
|
|
extern char _end;
|
||
|
|
|
||
|
|
#define PFN_ALIGN(x) (((unsigned long)(x) + (PAGE_SIZE - 1)) & PAGE_MASK)
|
||
|
|
|
||
|
|
|
||
|
|
struct prom_pmemblock * __init prom_getmdesc(void)
|
||
|
|
{
|
||
|
|
unsigned int memsize;
|
||
|
|
|
||
|
|
memsize = 0x02000000;
|
||
|
|
prom_printf("Setting default memory size 0x%08x\n", memsize);
|
||
|
|
|
||
|
|
memset(mdesc, 0, sizeof(mdesc));
|
||
|
|
|
||
|
|
mdesc[0].type = simmem_reserved;
|
||
|
|
mdesc[0].base = 0x00000000;
|
||
|
|
mdesc[0].size = 0x00001000;
|
||
|
|
|
||
|
|
mdesc[1].type = simmem_free;
|
||
|
|
mdesc[1].base = 0x00001000;
|
||
|
|
mdesc[1].size = 0x000ff000;
|
||
|
|
|
||
|
|
mdesc[2].type = simmem_reserved;
|
||
|
|
mdesc[2].base = 0x00100000;
|
||
|
|
mdesc[2].size = CPHYSADDR(PFN_ALIGN(&_end)) - mdesc[2].base;
|
||
|
|
|
||
|
|
mdesc[3].type = simmem_free;
|
||
|
|
mdesc[3].base = CPHYSADDR(PFN_ALIGN(&_end));
|
||
|
|
mdesc[3].size = memsize - mdesc[3].base;
|
||
|
|
|
||
|
|
return &mdesc[0];
|
||
|
|
}
|
||
|
|
|
||
|
|
static int __init prom_memtype_classify (unsigned int type)
|
||
|
|
{
|
||
|
|
switch (type) {
|
||
|
|
case simmem_free:
|
||
|
|
return BOOT_MEM_RAM;
|
||
|
|
case simmem_reserved:
|
||
|
|
default:
|
||
|
|
return BOOT_MEM_RESERVED;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void __init prom_meminit(void)
|
||
|
|
{
|
||
|
|
struct prom_pmemblock *p;
|
||
|
|
|
||
|
|
p = prom_getmdesc();
|
||
|
|
|
||
|
|
while (p->size) {
|
||
|
|
long type;
|
||
|
|
unsigned long base, size;
|
||
|
|
|
||
|
|
type = prom_memtype_classify (p->type);
|
||
|
|
base = p->base;
|
||
|
|
size = p->size;
|
||
|
|
|
||
|
|
add_memory_region(base, size, type);
|
||
|
|
p++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
unsigned long __init prom_free_prom_memory(void)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
unsigned long freed = 0;
|
||
|
|
unsigned long addr;
|
||
|
|
|
||
|
|
for (i = 0; i < boot_mem_map.nr_map; i++) {
|
||
|
|
if (boot_mem_map.map[i].type != BOOT_MEM_ROM_DATA)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
addr = boot_mem_map.map[i].addr;
|
||
|
|
while (addr < boot_mem_map.map[i].addr
|
||
|
|
+ boot_mem_map.map[i].size) {
|
||
|
|
ClearPageReserved(virt_to_page(__va(addr)));
|
||
|
|
set_page_count(virt_to_page(__va(addr)), 1);
|
||
|
|
free_page((unsigned long)__va(addr));
|
||
|
|
addr += PAGE_SIZE;
|
||
|
|
freed += PAGE_SIZE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
printk("Freeing prom memory: %ldkb freed\n", freed >> 10);
|
||
|
|
|
||
|
|
return freed;
|
||
|
|
}
|