discontig.c
3.86 KB
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
/*
* linux/arch/m32r/mm/discontig.c
*
* Discontig memory support
*
* Copyright (c) 2003 Hitoshi Yamamoto
*/
#include <linux/mm.h>
#include <linux/bootmem.h>
#include <linux/mmzone.h>
#include <linux/initrd.h>
#include <linux/nodemask.h>
#include <linux/module.h>
#include <linux/pfn.h>
#include <asm/setup.h>
extern char _end[];
struct pglist_data *node_data[MAX_NUMNODES];
EXPORT_SYMBOL(node_data);
pg_data_t m32r_node_data[MAX_NUMNODES];
/* Memory profile */
typedef struct {
unsigned long start_pfn;
unsigned long pages;
unsigned long holes;
unsigned long free_pfn;
} mem_prof_t;
static mem_prof_t mem_prof[MAX_NUMNODES];
extern unsigned long memory_start;
extern unsigned long memory_end;
static void __init mem_prof_init(void)
{
unsigned long start_pfn, holes, free_pfn;
const unsigned long zone_alignment = 1UL << (MAX_ORDER - 1);
unsigned long ul;
mem_prof_t *mp;
/* Node#0 SDRAM */
mp = &mem_prof[0];
mp->start_pfn = PFN_UP(CONFIG_MEMORY_START);
mp->pages = PFN_DOWN(memory_end - memory_start);
mp->holes = 0;
mp->free_pfn = PFN_UP(__pa(_end));
/* Node#1 internal SRAM */
mp = &mem_prof[1];
start_pfn = free_pfn = PFN_UP(CONFIG_IRAM_START);
holes = 0;
if (start_pfn & (zone_alignment - 1)) {
ul = zone_alignment;
while (start_pfn >= ul)
ul += zone_alignment;
start_pfn = ul - zone_alignment;
holes = free_pfn - start_pfn;
}
mp->start_pfn = start_pfn;
mp->pages = PFN_DOWN(CONFIG_IRAM_SIZE) + holes;
mp->holes = holes;
mp->free_pfn = PFN_UP(CONFIG_IRAM_START);
}
unsigned long __init setup_memory(void)
{
unsigned long bootmap_size;
unsigned long min_pfn;
int nid;
mem_prof_t *mp;
max_low_pfn = 0;
min_low_pfn = -1;
mem_prof_init();
for_each_online_node(nid) {
mp = &mem_prof[nid];
NODE_DATA(nid)=(pg_data_t *)&m32r_node_data[nid];
NODE_DATA(nid)->bdata = &bootmem_node_data[nid];
min_pfn = mp->start_pfn;
max_pfn = mp->start_pfn + mp->pages;
bootmap_size = init_bootmem_node(NODE_DATA(nid), mp->free_pfn,
mp->start_pfn, max_pfn);
free_bootmem_node(NODE_DATA(nid), PFN_PHYS(mp->start_pfn),
PFN_PHYS(mp->pages));
reserve_bootmem_node(NODE_DATA(nid), PFN_PHYS(mp->start_pfn),
PFN_PHYS(mp->free_pfn - mp->start_pfn) + bootmap_size,
BOOTMEM_DEFAULT);
if (max_low_pfn < max_pfn)
max_low_pfn = max_pfn;
if (min_low_pfn > min_pfn)
min_low_pfn = min_pfn;
}
#ifdef CONFIG_BLK_DEV_INITRD
if (LOADER_TYPE && INITRD_START) {
if (INITRD_START + INITRD_SIZE <= PFN_PHYS(max_low_pfn)) {
reserve_bootmem_node(NODE_DATA(0), INITRD_START,
INITRD_SIZE, BOOTMEM_DEFAULT);
initrd_start = INITRD_START + PAGE_OFFSET;
initrd_end = initrd_start + INITRD_SIZE;
printk("initrd:start[%08lx],size[%08lx]\n",
initrd_start, INITRD_SIZE);
} else {
printk("initrd extends beyond end of memory "
"(0x%08lx > 0x%08llx)\ndisabling initrd\n",
INITRD_START + INITRD_SIZE,
(unsigned long long)PFN_PHYS(max_low_pfn));
initrd_start = 0;
}
}
#endif /* CONFIG_BLK_DEV_INITRD */
return max_low_pfn;
}
#define START_PFN(nid) (NODE_DATA(nid)->bdata->node_min_pfn)
#define MAX_LOW_PFN(nid) (NODE_DATA(nid)->bdata->node_low_pfn)
void __init zone_sizes_init(void)
{
unsigned long zones_size[MAX_NR_ZONES], zholes_size[MAX_NR_ZONES];
unsigned long low, start_pfn;
int nid, i;
mem_prof_t *mp;
for_each_online_node(nid) {
mp = &mem_prof[nid];
for (i = 0 ; i < MAX_NR_ZONES ; i++) {
zones_size[i] = 0;
zholes_size[i] = 0;
}
start_pfn = START_PFN(nid);
low = MAX_LOW_PFN(nid);
zones_size[ZONE_DMA] = low - start_pfn;
zholes_size[ZONE_DMA] = mp->holes;
node_set_state(nid, N_NORMAL_MEMORY);
free_area_init_node(nid, zones_size, start_pfn, zholes_size);
}
/*
* For test
* Use all area of internal RAM.
* see __alloc_pages()
*/
NODE_DATA(1)->node_zones->watermark[WMARK_MIN] = 0;
NODE_DATA(1)->node_zones->watermark[WMARK_LOW] = 0;
NODE_DATA(1)->node_zones->watermark[WMARK_HIGH] = 0;
}