1/*
 2 * Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org>
 3 * Copyright (C) 2007 Eugene Konev <ejka@openwrt.org>
 4 *
 5 * This program is free software; you can redistribute it and/or modify
 6 * it under the terms of the GNU General Public License as published by
 7 * the Free Software Foundation; either version 2 of the License, or
 8 * (at your option) any later version.
 9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
18 */
19#include <linux/bootmem.h>
20#include <linux/init.h>
21#include <linux/mm.h>
22#include <linux/module.h>
23#include <linux/pfn.h>
24#include <linux/proc_fs.h>
25#include <linux/string.h>
26#include <linux/swap.h>
27
28#include <asm/bootinfo.h>
29#include <asm/page.h>
30#include <asm/sections.h>
31
32#include <asm/mach-ar7/ar7.h>
33#include <asm/mips-boards/prom.h>
34
35static int __init memsize(void)
36{
37	u32 size = (64 << 20);
38	u32 *addr = (u32 *)KSEG1ADDR(AR7_SDRAM_BASE + size - 4);
39	u32 *kernel_end = (u32 *)KSEG1ADDR(CPHYSADDR((u32)&_end));
40	u32 *tmpaddr = addr;
41
42	while (tmpaddr > kernel_end) {
43		*tmpaddr = (u32)tmpaddr;
44		size >>= 1;
45		tmpaddr -= size >> 2;
46	}
47
48	do {
49		tmpaddr += size >> 2;
50		if (*tmpaddr != (u32)tmpaddr)
51			break;
52		size <<= 1;
53	} while (size < (64 << 20));
54
55	writel((u32)tmpaddr, &addr);
56
57	return size;
58}
59
60void __init prom_meminit(void)
61{
62	unsigned long pages;
63
64	pages = memsize() >> PAGE_SHIFT;
65	add_memory_region(PHYS_OFFSET, pages << PAGE_SHIFT, BOOT_MEM_RAM);
66}
67
68void __init prom_free_prom_memory(void)
69{
70	/* Nothing to free */
71}

 1/*
 2 * Copyright (C) 2007 Felix Fietkau <nbd@openwrt.org>
 3 * Copyright (C) 2007 Eugene Konev <ejka@openwrt.org>
 4 *
 5 * This program is free software; you can redistribute it and/or modify
 6 * it under the terms of the GNU General Public License as published by
 7 * the Free Software Foundation; either version 2 of the License, or
 8 * (at your option) any later version.
 9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
18 */
19#include <linux/bootmem.h>
20#include <linux/init.h>
21#include <linux/mm.h>
22#include <linux/module.h>
23#include <linux/pfn.h>
24#include <linux/proc_fs.h>
25#include <linux/string.h>
26#include <linux/swap.h>
27
28#include <asm/bootinfo.h>
29#include <asm/page.h>
30#include <asm/sections.h>
31
32#include <asm/mach-ar7/ar7.h>
 
33
34static int __init memsize(void)
35{
36	u32 size = (64 << 20);
37	u32 *addr = (u32 *)KSEG1ADDR(AR7_SDRAM_BASE + size - 4);
38	u32 *kernel_end = (u32 *)KSEG1ADDR(CPHYSADDR((u32)&_end));
39	u32 *tmpaddr = addr;
40
41	while (tmpaddr > kernel_end) {
42		*tmpaddr = (u32)tmpaddr;
43		size >>= 1;
44		tmpaddr -= size >> 2;
45	}
46
47	do {
48		tmpaddr += size >> 2;
49		if (*tmpaddr != (u32)tmpaddr)
50			break;
51		size <<= 1;
52	} while (size < (64 << 20));
53
54	writel((u32)tmpaddr, &addr);
55
56	return size;
57}
58
59void __init prom_meminit(void)
60{
61	unsigned long pages;
62
63	pages = memsize() >> PAGE_SHIFT;
64	add_memory_region(PHYS_OFFSET, pages << PAGE_SHIFT, BOOT_MEM_RAM);
65}
66
67void __init prom_free_prom_memory(void)
68{
69	/* Nothing to free */
70}