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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> | |
7ca5dc14 FF |
33 | |
34 | static 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 | ||
dd34b5a8 | 54 | writel((u32)tmpaddr, &addr); |
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55 | |
56 | return size; | |
57 | } | |
58 | ||
59 | void __init prom_meminit(void) | |
60 | { | |
61 | unsigned long pages; | |
62 | ||
63 | pages = memsize() >> PAGE_SHIFT; | |
4d1da8c2 | 64 | add_memory_region(PHYS_OFFSET, pages << PAGE_SHIFT, BOOT_MEM_RAM); |
7ca5dc14 FF |
65 | } |
66 | ||
67 | void __init prom_free_prom_memory(void) | |
68 | { | |
69 | /* Nothing to free */ | |
70 | } |