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
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/*
* linux/arch/cris/mm/init.c
*
* Copyright (C) 1995 Linus Torvalds
* Copyright (C) 2000,2001 Axis Communications AB
*
* Authors: Bjorn Wesen (bjornw@axis.com)
*
* $Log: init.c,v $
* Revision 1.11 2004/05/28 09:28:56 starvik
* Calculation of loops_per_usec moved because initialization order has changed
* in Linux 2.6.
*
* Revision 1.10 2004/05/14 07:58:05 starvik
* Merge of changes from 2.4
*
* Revision 1.9 2003/07/04 08:27:54 starvik
* Merge of Linux 2.5.74
*
* Revision 1.8 2003/04/09 05:20:48 starvik
* Merge of Linux 2.5.67
*
* Revision 1.7 2003/01/22 06:48:38 starvik
* Fixed warnings issued by GCC 3.2.1
*
* Revision 1.6 2002/12/11 14:44:48 starvik
* Extracted v10 (ETRAX 100LX) specific stuff to arch/cris/arch-v10/mm
*
* Revision 1.5 2002/11/18 07:37:37 starvik
* Added cache bug workaround (from Linux 2.4)
*
* Revision 1.4 2002/11/13 15:40:24 starvik
* Removed the page table cache stuff (as done in other archs)
*
* Revision 1.3 2002/11/05 06:45:13 starvik
* Merge of Linux 2.5.45
*
* Revision 1.2 2001/12/18 13:35:22 bjornw
* Applied the 2.4.13->2.4.16 CRIS patch to 2.5.1 (is a copy of 2.4.15).
*
* Revision 1.31 2001/11/13 16:22:00 bjornw
* Skip calculating totalram and sharedram in si_meminfo
*
* Revision 1.30 2001/11/12 19:02:10 pkj
* Fixed compiler warnings.
*
* Revision 1.29 2001/07/25 16:09:50 bjornw
* val->sharedram will stay 0
*
* Revision 1.28 2001/06/28 16:30:17 bjornw
* Oops. This needs to wait until 2.4.6 is merged
*
* Revision 1.27 2001/06/28 14:04:07 bjornw
* Fill in sharedram
*
* Revision 1.26 2001/06/18 06:36:02 hp
* Enable free_initmem of __init-type pages
*
* Revision 1.25 2001/06/13 00:02:23 bjornw
* Use a separate variable to store the current pgd to avoid races in schedule
*
* Revision 1.24 2001/05/15 00:52:20 hp
* Only map segment 0xa as seg if CONFIG_JULIETTE
*
* Revision 1.23 2001/04/04 14:35:40 bjornw
* * Removed get_pte_slow and friends (2.4.3 change)
* * Removed bad_pmd handling (2.4.3 change)
*
* Revision 1.22 2001/04/04 13:38:04 matsfg
* Moved ioremap to a separate function instead
*
* Revision 1.21 2001/03/27 09:28:33 bjornw
* ioremap used too early - lets try it in mem_init instead
*
* Revision 1.20 2001/03/23 07:39:21 starvik
* Corrected according to review remarks
*
* Revision 1.19 2001/03/15 14:25:17 bjornw
* More general shadow registers and ioremaped addresses for external I/O
*
* Revision 1.18 2001/02/23 12:46:44 bjornw
* * 0xc was not CSE1; 0x8 is, same as uncached flash, so we move the uncached
* flash during CRIS_LOW_MAP from 0xe to 0x8 so both the flash and the I/O
* is mapped straight over (for !CRIS_LOW_MAP the uncached flash is still 0xe)
*
* Revision 1.17 2001/02/22 15:05:21 bjornw
* Map 0x9 straight over during LOW_MAP to allow for memory mapped LEDs
*
* Revision 1.16 2001/02/22 15:02:35 bjornw
* Map 0xc straight over during LOW_MAP to allow for memory mapped I/O
*
* Revision 1.15 2001/01/10 21:12:10 bjornw
* loops_per_sec -> loops_per_jiffy
*
* Revision 1.14 2000/11/22 16:23:20 bjornw
* Initialize totalhigh counters to 0 to make /proc/meminfo look nice.
*
* Revision 1.13 2000/11/21 16:37:51 bjornw
* Temporarily disable initmem freeing
*
* Revision 1.12 2000/11/21 13:55:07 bjornw
* Use CONFIG_CRIS_LOW_MAP for the low VM map instead of explicit CPU type
*
* Revision 1.11 2000/10/06 12:38:22 bjornw
* Cast empty_bad_page correctly (should really be of * type from the start..
*
* Revision 1.10 2000/10/04 16:53:57 bjornw
* Fix memory-map due to LX features
*
* Revision 1.9 2000/09/13 15:47:49 bjornw
* Wrong count in reserved-pages loop
*
* Revision 1.8 2000/09/13 14:35:10 bjornw
* 2.4.0-test8 added a new arg to free_area_init_node
*
* Revision 1.7 2000/08/17 15:35:55 bjornw
* 2.4.0-test6 removed MAP_NR and inserted virt_to_page
*
*
*/
#include <linux/init.h>
#include <linux/bootmem.h>
#include <asm/tlb.h>
DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
unsigned long empty_zero_page;
extern char _stext, _edata, _etext; /* From linkerscript */
extern char __init_begin, __init_end;
void
show_mem(void)
{
int i,free = 0,total = 0,cached = 0, reserved = 0, nonshared = 0;
int shared = 0;
printk("\nMem-info:\n");
show_free_areas();
printk("Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10));
i = max_mapnr;
while (i-- > 0) {
total++;
if (PageReserved(mem_map+i))
reserved++;
else if (PageSwapCache(mem_map+i))
cached++;
else if (!page_count(mem_map+i))
free++;
else if (page_count(mem_map+i) == 1)
nonshared++;
else
shared += page_count(mem_map+i) - 1;
}
printk("%d pages of RAM\n",total);
printk("%d free pages\n",free);
printk("%d reserved pages\n",reserved);
printk("%d pages nonshared\n",nonshared);
printk("%d pages shared\n",shared);
printk("%d pages swap cached\n",cached);
}
void __init
mem_init(void)
{
int codesize, reservedpages, datasize, initsize;
unsigned long tmp;
if(!mem_map)
BUG();
/* max/min_low_pfn was set by setup.c
* now we just copy it to some other necessary places...
*
* high_memory was also set in setup.c
*/
max_mapnr = num_physpages = max_low_pfn - min_low_pfn;
/* this will put all memory onto the freelists */
totalram_pages = free_all_bootmem();
reservedpages = 0;
for (tmp = 0; tmp < max_mapnr; tmp++) {
/*
* Only count reserved RAM pages
*/
if (PageReserved(mem_map + tmp))
reservedpages++;
}
codesize = (unsigned long) &_etext - (unsigned long) &_stext;
datasize = (unsigned long) &_edata - (unsigned long) &_etext;
initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin;
printk(KERN_INFO
"Memory: %luk/%luk available (%dk kernel code, %dk reserved, %dk data, "
"%dk init)\n" ,
(unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
max_mapnr << (PAGE_SHIFT-10),
codesize >> 10,
reservedpages << (PAGE_SHIFT-10),
datasize >> 10,
initsize >> 10
);
}
/* free the pages occupied by initialization code */
void
free_initmem(void)
{
unsigned long addr;
addr = (unsigned long)(&__init_begin);
for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
ClearPageReserved(virt_to_page(addr));
init_page_count(virt_to_page(addr));
free_page(addr);
totalram_pages++;
}
printk (KERN_INFO "Freeing unused kernel memory: %luk freed\n",
(unsigned long)((&__init_end - &__init_begin) >> 10));
}
|
