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/* $Id: ip27-memory.c,v 1.2 2000/01/27 01:05:24 ralf Exp $
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2000 by Ralf Baechle
* Copyright (C) 2000 by Silicon Graphics, Inc.
*
* On SGI IP27 the ARC memory configuration data is completly bogus but
* alternate easier to use mechanisms are available.
*/
#include <linux/init.h>
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/bootmem.h>
#include <asm/page.h>
#include <asm/bootinfo.h>
#include <asm/sn/klconfig.h>
extern char _end;
#define PFN_UP(x) (((x) + PAGE_SIZE-1) >> PAGE_SHIFT)
#define PFN_ALIGN(x) (((unsigned long)(x) + (PAGE_SIZE - 1)) & PAGE_MASK)
void __init
prom_meminit(void)
{
unsigned long free_start, free_end, start_pfn, mb, bootmap_size;
int bank, size;
lboard_t *board;
klmembnk_t *mem;
board = find_lboard(KLTYPE_IP27);
if (!board)
panic("Can't find memory info for myself.");
mem = (klmembnk_t *) KLCF_COMP(board, IP27_MEM_INDEX);
if (!mem)
panic("I'm running but don't exist?");
mb = 0;
for (bank = 0; bank < MD_MEM_BANKS; bank++) {
size = KLCONFIG_MEMBNK_SIZE(mem, bank);
mb += size;
if (size != 512) {
break;
}
}
free_start = PFN_ALIGN(&_end) - (CKSEG0 - K0BASE);
free_end = K0BASE + (mb << 20);
start_pfn = PFN_UP((unsigned long)&_end - CKSEG0);
if (bank != MD_MEM_BANKS && size != 0)
printk("Warning: noncontiguous memory configuration, "
"not using entire available memory.");
/* Register all the contiguous memory with the bootmem allocator
and free it. Be careful about the bootmem freemap. */
bootmap_size = init_bootmem(start_pfn, mb << (20 - PAGE_SHIFT));
free_bootmem(__pa(free_start), (mb << 20) - __pa(free_start));
reserve_bootmem(__pa(free_start), bootmap_size);
free_bootmem(0x19000, 0x1c000 - 0x19000);
printk("Found %ldmb of memory.\n", mb);
}
int __init page_is_ram(unsigned long pagenr)
{
return 1;
}
void __init
prom_free_prom_memory (void)
{
/* We got nothing to free here ... */
}
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