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
|
/*
* linux/arch/m68k/mm/init.c
*
* Copyright (C) 1995 Hamish Macdonald
*
* Contains common initialization routines, specific init code moved
* to motorola.c and sun3mmu.c
*/
#include <linux/module.h>
#include <linux/signal.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/swap.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/gfp.h>
#include <asm/setup.h>
#include <asm/uaccess.h>
#include <asm/page.h>
#include <asm/pgalloc.h>
#include <asm/traps.h>
#include <asm/machdep.h>
#include <asm/io.h>
#ifdef CONFIG_ATARI
#include <asm/atari_stram.h>
#endif
#include <asm/sections.h>
#include <asm/tlb.h>
/*
* ZERO_PAGE is a special page that is used for zero-initialized
* data and COW.
*/
void *empty_zero_page;
EXPORT_SYMBOL(empty_zero_page);
#if !defined(CONFIG_SUN3) && !defined(CONFIG_COLDFIRE)
extern void init_pointer_table(unsigned long ptable);
extern pmd_t *zero_pgtable;
#endif
#ifdef CONFIG_MMU
pg_data_t pg_data_map[MAX_NUMNODES];
EXPORT_SYMBOL(pg_data_map);
int m68k_virt_to_node_shift;
#ifndef CONFIG_SINGLE_MEMORY_CHUNK
pg_data_t *pg_data_table[65];
EXPORT_SYMBOL(pg_data_table);
#endif
void __init m68k_setup_node(int node)
{
#ifndef CONFIG_SINGLE_MEMORY_CHUNK
struct m68k_mem_info *info = m68k_memory + node;
int i, end;
i = (unsigned long)phys_to_virt(info->addr) >> __virt_to_node_shift();
end = (unsigned long)phys_to_virt(info->addr + info->size - 1) >> __virt_to_node_shift();
for (; i <= end; i++) {
if (pg_data_table[i])
printk("overlap at %u for chunk %u\n", i, node);
pg_data_table[i] = pg_data_map + node;
}
#endif
pg_data_map[node].bdata = bootmem_node_data + node;
node_set_online(node);
}
#else /* CONFIG_MMU */
/*
* paging_init() continues the virtual memory environment setup which
* was begun by the code in arch/head.S.
* The parameters are pointers to where to stick the starting and ending
* addresses of available kernel virtual memory.
*/
void __init paging_init(void)
{
/*
* Make sure start_mem is page aligned, otherwise bootmem and
* page_alloc get different views of the world.
*/
unsigned long end_mem = memory_end & PAGE_MASK;
unsigned long zones_size[MAX_NR_ZONES] = { 0, };
high_memory = (void *) end_mem;
empty_zero_page = alloc_bootmem_pages(PAGE_SIZE);
/*
* Set up SFC/DFC registers (user data space).
*/
set_fs (USER_DS);
zones_size[ZONE_DMA] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT;
free_area_init(zones_size);
}
#endif /* CONFIG_MMU */
void free_initmem(void)
{
#ifndef CONFIG_MMU_SUN3
free_initmem_default(-1);
#endif /* CONFIG_MMU_SUN3 */
}
#if defined(CONFIG_MMU) && !defined(CONFIG_COLDFIRE)
#define VECTORS &vectors[0]
#else
#define VECTORS _ramvec
#endif
void __init print_memmap(void)
{
#define UL(x) ((unsigned long) (x))
#define MLK(b, t) UL(b), UL(t), (UL(t) - UL(b)) >> 10
#define MLM(b, t) UL(b), UL(t), (UL(t) - UL(b)) >> 20
#define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), 1024)
pr_notice("Virtual kernel memory layout:\n"
" vector : 0x%08lx - 0x%08lx (%4ld KiB)\n"
" kmap : 0x%08lx - 0x%08lx (%4ld MiB)\n"
" vmalloc : 0x%08lx - 0x%08lx (%4ld MiB)\n"
" lowmem : 0x%08lx - 0x%08lx (%4ld MiB)\n"
" .init : 0x%p" " - 0x%p" " (%4d KiB)\n"
" .text : 0x%p" " - 0x%p" " (%4d KiB)\n"
" .data : 0x%p" " - 0x%p" " (%4d KiB)\n"
" .bss : 0x%p" " - 0x%p" " (%4d KiB)\n",
MLK(VECTORS, VECTORS + 256),
MLM(KMAP_START, KMAP_END),
MLM(VMALLOC_START, VMALLOC_END),
MLM(PAGE_OFFSET, (unsigned long)high_memory),
MLK_ROUNDUP(__init_begin, __init_end),
MLK_ROUNDUP(_stext, _etext),
MLK_ROUNDUP(_sdata, _edata),
MLK_ROUNDUP(__bss_start, __bss_stop));
}
static inline void init_pointer_tables(void)
{
#if defined(CONFIG_MMU) && !defined(CONFIG_SUN3) && !defined(CONFIG_COLDFIRE)
int i;
/* insert pointer tables allocated so far into the tablelist */
init_pointer_table((unsigned long)kernel_pg_dir);
for (i = 0; i < PTRS_PER_PGD; i++) {
if (pgd_present(kernel_pg_dir[i]))
init_pointer_table(__pgd_page(kernel_pg_dir[i]));
}
/* insert also pointer table that we used to unmap the zero page */
if (zero_pgtable)
init_pointer_table((unsigned long)zero_pgtable);
#endif
}
void __init mem_init(void)
{
/* this will put all memory onto the freelists */
free_all_bootmem();
init_pointer_tables();
mem_init_print_info(NULL);
print_memmap();
}
#ifdef CONFIG_BLK_DEV_INITRD
void free_initrd_mem(unsigned long start, unsigned long end)
{
free_reserved_area((void *)start, (void *)end, -1, "initrd");
}
#endif
|
