diff options
author | Glenn Elliott <gelliott@cs.unc.edu> | 2012-03-04 19:47:13 -0500 |
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committer | Glenn Elliott <gelliott@cs.unc.edu> | 2012-03-04 19:47:13 -0500 |
commit | c71c03bda1e86c9d5198c5d83f712e695c4f2a1e (patch) | |
tree | ecb166cb3e2b7e2adb3b5e292245fefd23381ac8 /arch/m68k/mm/init_mm.c | |
parent | ea53c912f8a86a8567697115b6a0d8152beee5c8 (diff) | |
parent | 6a00f206debf8a5c8899055726ad127dbeeed098 (diff) |
Merge branch 'mpi-master' into wip-k-fmlpwip-k-fmlp
Conflicts:
litmus/sched_cedf.c
Diffstat (limited to 'arch/m68k/mm/init_mm.c')
-rw-r--r-- | arch/m68k/mm/init_mm.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/arch/m68k/mm/init_mm.c b/arch/m68k/mm/init_mm.c new file mode 100644 index 000000000000..9113c2f17607 --- /dev/null +++ b/arch/m68k/mm/init_mm.c | |||
@@ -0,0 +1,148 @@ | |||
1 | /* | ||
2 | * linux/arch/m68k/mm/init.c | ||
3 | * | ||
4 | * Copyright (C) 1995 Hamish Macdonald | ||
5 | * | ||
6 | * Contains common initialization routines, specific init code moved | ||
7 | * to motorola.c and sun3mmu.c | ||
8 | */ | ||
9 | |||
10 | #include <linux/module.h> | ||
11 | #include <linux/signal.h> | ||
12 | #include <linux/sched.h> | ||
13 | #include <linux/mm.h> | ||
14 | #include <linux/swap.h> | ||
15 | #include <linux/kernel.h> | ||
16 | #include <linux/string.h> | ||
17 | #include <linux/types.h> | ||
18 | #include <linux/init.h> | ||
19 | #include <linux/bootmem.h> | ||
20 | #include <linux/gfp.h> | ||
21 | |||
22 | #include <asm/setup.h> | ||
23 | #include <asm/uaccess.h> | ||
24 | #include <asm/page.h> | ||
25 | #include <asm/pgalloc.h> | ||
26 | #include <asm/system.h> | ||
27 | #include <asm/machdep.h> | ||
28 | #include <asm/io.h> | ||
29 | #ifdef CONFIG_ATARI | ||
30 | #include <asm/atari_stram.h> | ||
31 | #endif | ||
32 | #include <asm/sections.h> | ||
33 | #include <asm/tlb.h> | ||
34 | |||
35 | pg_data_t pg_data_map[MAX_NUMNODES]; | ||
36 | EXPORT_SYMBOL(pg_data_map); | ||
37 | |||
38 | int m68k_virt_to_node_shift; | ||
39 | |||
40 | #ifndef CONFIG_SINGLE_MEMORY_CHUNK | ||
41 | pg_data_t *pg_data_table[65]; | ||
42 | EXPORT_SYMBOL(pg_data_table); | ||
43 | #endif | ||
44 | |||
45 | void __init m68k_setup_node(int node) | ||
46 | { | ||
47 | #ifndef CONFIG_SINGLE_MEMORY_CHUNK | ||
48 | struct mem_info *info = m68k_memory + node; | ||
49 | int i, end; | ||
50 | |||
51 | i = (unsigned long)phys_to_virt(info->addr) >> __virt_to_node_shift(); | ||
52 | end = (unsigned long)phys_to_virt(info->addr + info->size - 1) >> __virt_to_node_shift(); | ||
53 | for (; i <= end; i++) { | ||
54 | if (pg_data_table[i]) | ||
55 | printk("overlap at %u for chunk %u\n", i, node); | ||
56 | pg_data_table[i] = pg_data_map + node; | ||
57 | } | ||
58 | #endif | ||
59 | pg_data_map[node].bdata = bootmem_node_data + node; | ||
60 | node_set_online(node); | ||
61 | } | ||
62 | |||
63 | |||
64 | /* | ||
65 | * ZERO_PAGE is a special page that is used for zero-initialized | ||
66 | * data and COW. | ||
67 | */ | ||
68 | |||
69 | void *empty_zero_page; | ||
70 | EXPORT_SYMBOL(empty_zero_page); | ||
71 | |||
72 | extern void init_pointer_table(unsigned long ptable); | ||
73 | |||
74 | /* References to section boundaries */ | ||
75 | |||
76 | extern pmd_t *zero_pgtable; | ||
77 | |||
78 | void __init mem_init(void) | ||
79 | { | ||
80 | pg_data_t *pgdat; | ||
81 | int codepages = 0; | ||
82 | int datapages = 0; | ||
83 | int initpages = 0; | ||
84 | int i; | ||
85 | |||
86 | #ifdef CONFIG_ATARI | ||
87 | if (MACH_IS_ATARI) | ||
88 | atari_stram_mem_init_hook(); | ||
89 | #endif | ||
90 | |||
91 | /* this will put all memory onto the freelists */ | ||
92 | totalram_pages = num_physpages = 0; | ||
93 | for_each_online_pgdat(pgdat) { | ||
94 | num_physpages += pgdat->node_present_pages; | ||
95 | |||
96 | totalram_pages += free_all_bootmem_node(pgdat); | ||
97 | for (i = 0; i < pgdat->node_spanned_pages; i++) { | ||
98 | struct page *page = pgdat->node_mem_map + i; | ||
99 | char *addr = page_to_virt(page); | ||
100 | |||
101 | if (!PageReserved(page)) | ||
102 | continue; | ||
103 | if (addr >= _text && | ||
104 | addr < _etext) | ||
105 | codepages++; | ||
106 | else if (addr >= __init_begin && | ||
107 | addr < __init_end) | ||
108 | initpages++; | ||
109 | else | ||
110 | datapages++; | ||
111 | } | ||
112 | } | ||
113 | |||
114 | #ifndef CONFIG_SUN3 | ||
115 | /* insert pointer tables allocated so far into the tablelist */ | ||
116 | init_pointer_table((unsigned long)kernel_pg_dir); | ||
117 | for (i = 0; i < PTRS_PER_PGD; i++) { | ||
118 | if (pgd_present(kernel_pg_dir[i])) | ||
119 | init_pointer_table(__pgd_page(kernel_pg_dir[i])); | ||
120 | } | ||
121 | |||
122 | /* insert also pointer table that we used to unmap the zero page */ | ||
123 | if (zero_pgtable) | ||
124 | init_pointer_table((unsigned long)zero_pgtable); | ||
125 | #endif | ||
126 | |||
127 | printk("Memory: %luk/%luk available (%dk kernel code, %dk data, %dk init)\n", | ||
128 | nr_free_pages() << (PAGE_SHIFT-10), | ||
129 | totalram_pages << (PAGE_SHIFT-10), | ||
130 | codepages << (PAGE_SHIFT-10), | ||
131 | datapages << (PAGE_SHIFT-10), | ||
132 | initpages << (PAGE_SHIFT-10)); | ||
133 | } | ||
134 | |||
135 | #ifdef CONFIG_BLK_DEV_INITRD | ||
136 | void free_initrd_mem(unsigned long start, unsigned long end) | ||
137 | { | ||
138 | int pages = 0; | ||
139 | for (; start < end; start += PAGE_SIZE) { | ||
140 | ClearPageReserved(virt_to_page(start)); | ||
141 | init_page_count(virt_to_page(start)); | ||
142 | free_page(start); | ||
143 | totalram_pages++; | ||
144 | pages++; | ||
145 | } | ||
146 | printk ("Freeing initrd memory: %dk freed\n", pages); | ||
147 | } | ||
148 | #endif | ||