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_no.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_no.c')
-rw-r--r-- | arch/m68k/mm/init_no.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/arch/m68k/mm/init_no.c b/arch/m68k/mm/init_no.c new file mode 100644 index 000000000000..7cbd7bd1f8bc --- /dev/null +++ b/arch/m68k/mm/init_no.c | |||
@@ -0,0 +1,150 @@ | |||
1 | /* | ||
2 | * linux/arch/m68knommu/mm/init.c | ||
3 | * | ||
4 | * Copyright (C) 1998 D. Jeff Dionne <jeff@lineo.ca>, | ||
5 | * Kenneth Albanowski <kjahds@kjahds.com>, | ||
6 | * Copyright (C) 2000 Lineo, Inc. (www.lineo.com) | ||
7 | * | ||
8 | * Based on: | ||
9 | * | ||
10 | * linux/arch/m68k/mm/init.c | ||
11 | * | ||
12 | * Copyright (C) 1995 Hamish Macdonald | ||
13 | * | ||
14 | * JAN/1999 -- hacked to support ColdFire (gerg@snapgear.com) | ||
15 | * DEC/2000 -- linux 2.4 support <davidm@snapgear.com> | ||
16 | */ | ||
17 | |||
18 | #include <linux/signal.h> | ||
19 | #include <linux/sched.h> | ||
20 | #include <linux/kernel.h> | ||
21 | #include <linux/errno.h> | ||
22 | #include <linux/string.h> | ||
23 | #include <linux/types.h> | ||
24 | #include <linux/ptrace.h> | ||
25 | #include <linux/mman.h> | ||
26 | #include <linux/mm.h> | ||
27 | #include <linux/swap.h> | ||
28 | #include <linux/init.h> | ||
29 | #include <linux/highmem.h> | ||
30 | #include <linux/pagemap.h> | ||
31 | #include <linux/bootmem.h> | ||
32 | #include <linux/gfp.h> | ||
33 | |||
34 | #include <asm/setup.h> | ||
35 | #include <asm/segment.h> | ||
36 | #include <asm/page.h> | ||
37 | #include <asm/pgtable.h> | ||
38 | #include <asm/system.h> | ||
39 | #include <asm/machdep.h> | ||
40 | |||
41 | /* | ||
42 | * ZERO_PAGE is a special page that is used for zero-initialized | ||
43 | * data and COW. | ||
44 | */ | ||
45 | unsigned long empty_zero_page; | ||
46 | |||
47 | extern unsigned long memory_start; | ||
48 | extern unsigned long memory_end; | ||
49 | |||
50 | /* | ||
51 | * paging_init() continues the virtual memory environment setup which | ||
52 | * was begun by the code in arch/head.S. | ||
53 | * The parameters are pointers to where to stick the starting and ending | ||
54 | * addresses of available kernel virtual memory. | ||
55 | */ | ||
56 | void __init paging_init(void) | ||
57 | { | ||
58 | /* | ||
59 | * Make sure start_mem is page aligned, otherwise bootmem and | ||
60 | * page_alloc get different views of the world. | ||
61 | */ | ||
62 | unsigned long end_mem = memory_end & PAGE_MASK; | ||
63 | unsigned long zones_size[MAX_NR_ZONES] = {0, }; | ||
64 | |||
65 | empty_zero_page = (unsigned long)alloc_bootmem_pages(PAGE_SIZE); | ||
66 | memset((void *)empty_zero_page, 0, PAGE_SIZE); | ||
67 | |||
68 | /* | ||
69 | * Set up SFC/DFC registers (user data space). | ||
70 | */ | ||
71 | set_fs (USER_DS); | ||
72 | |||
73 | zones_size[ZONE_DMA] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT; | ||
74 | free_area_init(zones_size); | ||
75 | } | ||
76 | |||
77 | void __init mem_init(void) | ||
78 | { | ||
79 | int codek = 0, datak = 0, initk = 0; | ||
80 | unsigned long tmp; | ||
81 | extern char _etext, _stext, _sdata, _ebss, __init_begin, __init_end; | ||
82 | extern unsigned int _ramend, _rambase; | ||
83 | unsigned long len = _ramend - _rambase; | ||
84 | unsigned long start_mem = memory_start; /* DAVIDM - these must start at end of kernel */ | ||
85 | unsigned long end_mem = memory_end; /* DAVIDM - this must not include kernel stack at top */ | ||
86 | |||
87 | pr_debug("Mem_init: start=%lx, end=%lx\n", start_mem, end_mem); | ||
88 | |||
89 | end_mem &= PAGE_MASK; | ||
90 | high_memory = (void *) end_mem; | ||
91 | |||
92 | start_mem = PAGE_ALIGN(start_mem); | ||
93 | max_mapnr = num_physpages = (((unsigned long) high_memory) - PAGE_OFFSET) >> PAGE_SHIFT; | ||
94 | |||
95 | /* this will put all memory onto the freelists */ | ||
96 | totalram_pages = free_all_bootmem(); | ||
97 | |||
98 | codek = (&_etext - &_stext) >> 10; | ||
99 | datak = (&_ebss - &_sdata) >> 10; | ||
100 | initk = (&__init_begin - &__init_end) >> 10; | ||
101 | |||
102 | tmp = nr_free_pages() << PAGE_SHIFT; | ||
103 | printk(KERN_INFO "Memory available: %luk/%luk RAM, (%dk kernel code, %dk data)\n", | ||
104 | tmp >> 10, | ||
105 | len >> 10, | ||
106 | codek, | ||
107 | datak | ||
108 | ); | ||
109 | } | ||
110 | |||
111 | |||
112 | #ifdef CONFIG_BLK_DEV_INITRD | ||
113 | void free_initrd_mem(unsigned long start, unsigned long end) | ||
114 | { | ||
115 | int pages = 0; | ||
116 | for (; start < end; start += PAGE_SIZE) { | ||
117 | ClearPageReserved(virt_to_page(start)); | ||
118 | init_page_count(virt_to_page(start)); | ||
119 | free_page(start); | ||
120 | totalram_pages++; | ||
121 | pages++; | ||
122 | } | ||
123 | printk (KERN_NOTICE "Freeing initrd memory: %dk freed\n", pages * (PAGE_SIZE / 1024)); | ||
124 | } | ||
125 | #endif | ||
126 | |||
127 | void free_initmem(void) | ||
128 | { | ||
129 | #ifdef CONFIG_RAMKERNEL | ||
130 | unsigned long addr; | ||
131 | extern char __init_begin, __init_end; | ||
132 | /* | ||
133 | * The following code should be cool even if these sections | ||
134 | * are not page aligned. | ||
135 | */ | ||
136 | addr = PAGE_ALIGN((unsigned long)(&__init_begin)); | ||
137 | /* next to check that the page we free is not a partial page */ | ||
138 | for (; addr + PAGE_SIZE < (unsigned long)(&__init_end); addr +=PAGE_SIZE) { | ||
139 | ClearPageReserved(virt_to_page(addr)); | ||
140 | init_page_count(virt_to_page(addr)); | ||
141 | free_page(addr); | ||
142 | totalram_pages++; | ||
143 | } | ||
144 | printk(KERN_NOTICE "Freeing unused kernel memory: %ldk freed (0x%x - 0x%x)\n", | ||
145 | (addr - PAGE_ALIGN((long) &__init_begin)) >> 10, | ||
146 | (int)(PAGE_ALIGN((unsigned long)(&__init_begin))), | ||
147 | (int)(addr - PAGE_SIZE)); | ||
148 | #endif | ||
149 | } | ||
150 | |||