1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
/*
* $Id$
*
* Copyright (C) 2007 OpenWrt.org
*
* Based on arch/mips/mm/init.c
* Copyright (C) 1994 - 2000 Ralf Baechle
* Copyright (C) 1999, 2000 Silicon Graphics, Inc.
* Kevin D. Kissell, kevink@mips.com and Carsten Langgaard, carstenl@mips.com
* Copyright (C) 2000 MIPS Technologies, Inc. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/bootmem.h>
#include <linux/init.h>
#include <linux/initrd.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/pfn.h>
#include <linux/proc_fs.h>
#include <linux/string.h>
#include <linux/swap.h>
#include <asm/bootinfo.h>
#include <asm/page.h>
#include <asm/sections.h>
#include <asm/mips-boards/prom.h>
#warning FIXME: use sdram control regs and/or autodetection
static int __init memsize(void)
{
char *memsize_str;
unsigned int result;
char cmdline[CL_SIZE], *ptr;
/* Check the command line first for a memsize directive */
strcpy(cmdline, arcs_cmdline);
ptr = strstr(cmdline, "memsize=");
if (ptr && (ptr != cmdline) && (*(ptr - 1) != ' '))
ptr = strstr(ptr, " memsize=");
if (ptr) {
result = memparse(ptr + 8, &ptr);
} else {
/* otherwise look in the environment */
memsize_str = prom_getenv("memsize");
if (!memsize_str) {
prom_printf("memsize not set in boot prom, set to default (8Mb)\n");
result = 0x00800000;
} else {
result = simple_strtol(memsize_str, NULL, 0);
}
}
return result;
}
extern unsigned long __initramfs_start, __initramfs_end;
#ifdef CONFIG_NEED_MULTIPLE_NODES
static bootmem_data_t node_bootmem_data;
pg_data_t __node_data[1] = {
{
.bdata = &node_bootmem_data
},
};
EXPORT_SYMBOL(__node_data);
unsigned long max_mapnr;
struct page *mem_map;
EXPORT_SYMBOL(max_mapnr);
EXPORT_SYMBOL(mem_map);
static unsigned long setup_zero_pages(void)
{
unsigned int order = 3;
unsigned long size;
struct page *page;
empty_zero_page = __get_free_pages(GFP_KERNEL | __GFP_ZERO, order);
if (!empty_zero_page)
panic("Oh boy, that early out of memory?");
page = virt_to_page(empty_zero_page);
split_page(page, order);
while (page < virt_to_page(empty_zero_page + (PAGE_SIZE << order))) {
SetPageReserved(page);
page++;
}
size = PAGE_SIZE << order;
zero_page_mask = (size - 1) & PAGE_MASK;
return 1UL << order;
}
extern void pagetable_init(void);
void __init paging_init(void)
{
unsigned long zones_size[MAX_NR_ZONES] = { 0, };
pagetable_init();
zones_size[ZONE_DMA] = max_low_pfn - min_low_pfn;
free_area_init_node(0, NODE_DATA(0), zones_size, ARCH_PFN_OFFSET, NULL);
}
static struct kcore_list kcore_mem, kcore_vmalloc;
void __init mem_init(void)
{
unsigned long codesize, reservedpages, datasize, initsize;
unsigned long tmp, ram;
unsigned long kernel_start, kernel_end;
kernel_start = PFN_DOWN(CPHYSADDR((unsigned long)&_text));
kernel_end = PFN_UP(CPHYSADDR((unsigned long)&_end));
for (tmp = min_low_pfn + 1; tmp < kernel_start; tmp++) {
ClearPageReserved(pfn_to_page(tmp));
init_page_count(pfn_to_page(tmp));
free_page((unsigned long)__va(tmp << PAGE_SHIFT));
}
totalram_pages += free_all_bootmem();
totalram_pages -= setup_zero_pages(); /* Setup zeroed pages. */
reservedpages = ram = 0;
for (tmp = min_low_pfn; tmp <= max_low_pfn; tmp++) {
ram++;
if (PageReserved(pfn_to_page(tmp)))
if ((tmp < kernel_start) || (tmp > kernel_end))
reservedpages++;
}
num_physpages = ram;
codesize = (unsigned long) &_etext - (unsigned long) &_text;
datasize = (unsigned long) &_edata - (unsigned long) &_etext;
initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin;
kclist_add(&kcore_mem, __va(min_low_pfn),
(max_low_pfn - min_low_pfn) << PAGE_SHIFT);
kclist_add(&kcore_vmalloc, (void *)VMALLOC_START,
VMALLOC_END - VMALLOC_START);
printk(KERN_INFO "Memory: %luk/%luk available (%ldk kernel code, "
"%ldk reserved, %ldk data, %ldk init)\n",
(unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
ram << (PAGE_SHIFT-10),
codesize >> 10,
reservedpages << (PAGE_SHIFT-10),
datasize >> 10,
initsize >> 10);
}
#endif
void __init prom_meminit(void)
{
#ifdef CONFIG_NEED_MULTIPLE_NODES
unsigned long kernel_start, kernel_end;
unsigned long pages, free_pages;
unsigned long bootmap_size;
#endif
#ifdef CONFIG_BLK_DEV_INITRD
initrd_start = (unsigned long)&__initramfs_start;
initrd_end = (unsigned long)&__initramfs_end;
#endif
pages = memsize() >> PAGE_SHIFT;
add_memory_region(ARCH_PFN_OFFSET << PAGE_SHIFT, pages <<
PAGE_SHIFT, BOOT_MEM_RAM);
#ifdef CONFIG_NEED_MULTIPLE_NODES
kernel_start = PFN_DOWN(CPHYSADDR((unsigned long)&_text));
kernel_end = PFN_UP(CPHYSADDR((unsigned long)&_end));
min_low_pfn = ARCH_PFN_OFFSET;
max_low_pfn = ARCH_PFN_OFFSET + pages;
max_mapnr = max_low_pfn;
free_pages = pages - (kernel_end - min_low_pfn);
bootmap_size = init_bootmem_node(NODE_DATA(0), kernel_end,
ARCH_PFN_OFFSET, max_low_pfn);
free_bootmem(PFN_PHYS(kernel_end), free_pages << PAGE_SHIFT);
memory_present(0, min_low_pfn, max_low_pfn);
reserve_bootmem(PFN_PHYS(kernel_end), bootmap_size);
mem_map = NODE_DATA(0)->node_mem_map;
#endif
}
unsigned long __init prom_free_prom_memory(void)
{
/* return freed;
*/
return 0;
}
|
