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6bc9a396 CL |
1 | /* |
2 | * arch/score/mm/init.c | |
3 | * | |
4 | * Score Processor version. | |
5 | * | |
6 | * Copyright (C) 2009 Sunplus Core Technology Co., Ltd. | |
7 | * Lennox Wu <lennox.wu@sunplusct.com> | |
8 | * Chen Liqin <liqin.chen@sunplusct.com> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, see the file COPYING, or write | |
22 | * to the Free Software Foundation, Inc., | |
23 | * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
24 | */ | |
25 | ||
26 | #include <linux/errno.h> | |
27 | #include <linux/bootmem.h> | |
28 | #include <linux/kernel.h> | |
5a0e3ad6 | 29 | #include <linux/gfp.h> |
6bc9a396 CL |
30 | #include <linux/init.h> |
31 | #include <linux/mm.h> | |
32 | #include <linux/mman.h> | |
33 | #include <linux/pagemap.h> | |
34 | #include <linux/proc_fs.h> | |
35 | #include <linux/sched.h> | |
fbd85b0e | 36 | #include <linux/initrd.h> |
6bc9a396 | 37 | |
fbd85b0e | 38 | #include <asm/sections.h> |
6bc9a396 CL |
39 | #include <asm/tlb.h> |
40 | ||
6bc9a396 CL |
41 | unsigned long empty_zero_page; |
42 | EXPORT_SYMBOL_GPL(empty_zero_page); | |
43 | ||
44 | static struct kcore_list kcore_mem, kcore_vmalloc; | |
45 | ||
7265d80f | 46 | static void setup_zero_page(void) |
6bc9a396 | 47 | { |
6bc9a396 CL |
48 | struct page *page; |
49 | ||
fbd85b0e | 50 | empty_zero_page = __get_free_pages(GFP_KERNEL | __GFP_ZERO, 0); |
6bc9a396 CL |
51 | if (!empty_zero_page) |
52 | panic("Oh boy, that early out of memory?"); | |
53 | ||
54 | page = virt_to_page((void *) empty_zero_page); | |
7265d80f | 55 | mark_page_reserved(page); |
6bc9a396 CL |
56 | } |
57 | ||
58 | #ifndef CONFIG_NEED_MULTIPLE_NODES | |
61ef2489 | 59 | int page_is_ram(unsigned long pagenr) |
6bc9a396 CL |
60 | { |
61 | if (pagenr >= min_low_pfn && pagenr < max_low_pfn) | |
62 | return 1; | |
63 | else | |
64 | return 0; | |
65 | } | |
66 | ||
67 | void __init paging_init(void) | |
68 | { | |
69 | unsigned long max_zone_pfns[MAX_NR_ZONES]; | |
70 | unsigned long lastpfn; | |
71 | ||
72 | pagetable_init(); | |
73 | max_zone_pfns[ZONE_NORMAL] = max_low_pfn; | |
74 | lastpfn = max_low_pfn; | |
75 | free_area_init_nodes(max_zone_pfns); | |
76 | } | |
77 | ||
78 | void __init mem_init(void) | |
79 | { | |
80 | unsigned long codesize, reservedpages, datasize, initsize; | |
81 | unsigned long tmp, ram = 0; | |
82 | ||
6bc9a396 CL |
83 | high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT); |
84 | totalram_pages += free_all_bootmem(); | |
7265d80f | 85 | setup_zero_page(); /* Setup zeroed pages. */ |
6bc9a396 CL |
86 | reservedpages = 0; |
87 | ||
88 | for (tmp = 0; tmp < max_low_pfn; tmp++) | |
89 | if (page_is_ram(tmp)) { | |
90 | ram++; | |
91 | if (PageReserved(pfn_to_page(tmp))) | |
92 | reservedpages++; | |
93 | } | |
94 | ||
95 | num_physpages = ram; | |
96 | codesize = (unsigned long) &_etext - (unsigned long) &_text; | |
97 | datasize = (unsigned long) &_edata - (unsigned long) &_etext; | |
98 | initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin; | |
99 | ||
6bc9a396 CL |
100 | printk(KERN_INFO "Memory: %luk/%luk available (%ldk kernel code, " |
101 | "%ldk reserved, %ldk data, %ldk init, %ldk highmem)\n", | |
102 | (unsigned long) nr_free_pages() << (PAGE_SHIFT-10), | |
103 | ram << (PAGE_SHIFT-10), codesize >> 10, | |
104 | reservedpages << (PAGE_SHIFT-10), datasize >> 10, | |
105 | initsize >> 10, | |
4b529401 | 106 | totalhigh_pages << (PAGE_SHIFT-10)); |
6bc9a396 CL |
107 | } |
108 | #endif /* !CONFIG_NEED_MULTIPLE_NODES */ | |
109 | ||
6bc9a396 CL |
110 | #ifdef CONFIG_BLK_DEV_INITRD |
111 | void free_initrd_mem(unsigned long start, unsigned long end) | |
112 | { | |
7265d80f | 113 | free_reserved_area(start, end, POISON_FREE_INITMEM, "initrd"); |
6bc9a396 CL |
114 | } |
115 | #endif | |
116 | ||
117 | void __init_refok free_initmem(void) | |
118 | { | |
7265d80f | 119 | free_initmem_default(POISON_FREE_INITMEM); |
6bc9a396 CL |
120 | } |
121 | ||
122 | unsigned long pgd_current; | |
123 | ||
124 | #define __page_aligned(order) __attribute__((__aligned__(PAGE_SIZE<<order))) | |
125 | ||
126 | /* | |
127 | * gcc 3.3 and older have trouble determining that PTRS_PER_PGD and PGD_ORDER | |
128 | * are constants. So we use the variants from asm-offset.h until that gcc | |
129 | * will officially be retired. | |
130 | */ | |
d8aa899b | 131 | pgd_t swapper_pg_dir[PTRS_PER_PGD] __page_aligned(PTE_ORDER); |
6bc9a396 | 132 | pte_t invalid_pte_table[PTRS_PER_PTE] __page_aligned(PTE_ORDER); |