1 /*
2 * Copyright (C) 2005 MIPS Technologies, Inc. All rights reserved.
3 *
4 * This program is free software; you can distribute it and/or modify it
5 * under the terms of the GNU General Public License (Version 2) as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
11 * for more details.
12 *
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
16 *
17 */
18 #include <linux/init.h>
19 #include <linux/mm.h>
20 #include <linux/bootmem.h>
21 #include <linux/pfn.h>
22
23 #include <asm/bootinfo.h>
24 #include <asm/page.h>
25 #include <asm/sections.h>
26
27 #include <asm/mips-boards/prom.h>
28
29 /*#define DEBUG*/
30
31 enum simmem_memtypes {
32 simmem_reserved = 0,
33 simmem_free,
34 };
35 struct prom_pmemblock mdesc[PROM_MAX_PMEMBLOCKS];
36
37 #ifdef DEBUG
38 static char *mtypes[3] = {
39 "SIM reserved memory",
40 "SIM free memory",
41 };
42 #endif
43
prom_getmdesc(void)44 struct prom_pmemblock * __init prom_getmdesc(void)
45 {
46 unsigned int memsize;
47
48 memsize = 0x02000000;
49 pr_info("Setting default memory size 0x%08x\n", memsize);
50
51 memset(mdesc, 0, sizeof(mdesc));
52
53 mdesc[0].type = simmem_reserved;
54 mdesc[0].base = 0x00000000;
55 mdesc[0].size = 0x00001000;
56
57 mdesc[1].type = simmem_free;
58 mdesc[1].base = 0x00001000;
59 mdesc[1].size = 0x000ff000;
60
61 mdesc[2].type = simmem_reserved;
62 mdesc[2].base = 0x00100000;
63 mdesc[2].size = CPHYSADDR(PFN_ALIGN(&_end)) - mdesc[2].base;
64
65 mdesc[3].type = simmem_free;
66 mdesc[3].base = CPHYSADDR(PFN_ALIGN(&_end));
67 mdesc[3].size = memsize - mdesc[3].base;
68
69 return &mdesc[0];
70 }
71
prom_memtype_classify(unsigned int type)72 static int __init prom_memtype_classify(unsigned int type)
73 {
74 switch (type) {
75 case simmem_free:
76 return BOOT_MEM_RAM;
77 case simmem_reserved:
78 default:
79 return BOOT_MEM_RESERVED;
80 }
81 }
82
prom_meminit(void)83 void __init prom_meminit(void)
84 {
85 struct prom_pmemblock *p;
86
87 p = prom_getmdesc();
88
89 while (p->size) {
90 long type;
91 unsigned long base, size;
92
93 type = prom_memtype_classify(p->type);
94 base = p->base;
95 size = p->size;
96
97 add_memory_region(base, size, type);
98 p++;
99 }
100 }
101
prom_free_prom_memory(void)102 void __init prom_free_prom_memory(void)
103 {
104 int i;
105 unsigned long addr;
106
107 for (i = 0; i < boot_mem_map.nr_map; i++) {
108 if (boot_mem_map.map[i].type != BOOT_MEM_ROM_DATA)
109 continue;
110
111 addr = boot_mem_map.map[i].addr;
112 free_init_pages("prom memory",
113 addr, addr + boot_mem_map.map[i].size);
114 }
115 }
116