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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> | |
2f96b8c1 | 34 | #include <linux/kcore.h> |
6bc9a396 | 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 | ||
7265d80f | 44 | static void setup_zero_page(void) |
6bc9a396 | 45 | { |
6bc9a396 CL |
46 | struct page *page; |
47 | ||
fbd85b0e | 48 | empty_zero_page = __get_free_pages(GFP_KERNEL | __GFP_ZERO, 0); |
6bc9a396 CL |
49 | if (!empty_zero_page) |
50 | panic("Oh boy, that early out of memory?"); | |
51 | ||
52 | page = virt_to_page((void *) empty_zero_page); | |
7265d80f | 53 | mark_page_reserved(page); |
6bc9a396 CL |
54 | } |
55 | ||
56 | #ifndef CONFIG_NEED_MULTIPLE_NODES | |
61ef2489 | 57 | int page_is_ram(unsigned long pagenr) |
6bc9a396 CL |
58 | { |
59 | if (pagenr >= min_low_pfn && pagenr < max_low_pfn) | |
60 | return 1; | |
61 | else | |
62 | return 0; | |
63 | } | |
64 | ||
65 | void __init paging_init(void) | |
66 | { | |
67 | unsigned long max_zone_pfns[MAX_NR_ZONES]; | |
68 | unsigned long lastpfn; | |
69 | ||
70 | pagetable_init(); | |
71 | max_zone_pfns[ZONE_NORMAL] = max_low_pfn; | |
72 | lastpfn = max_low_pfn; | |
73 | free_area_init_nodes(max_zone_pfns); | |
74 | } | |
75 | ||
76 | void __init mem_init(void) | |
77 | { | |
6bc9a396 | 78 | high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT); |
0c988534 | 79 | free_all_bootmem(); |
7265d80f | 80 | setup_zero_page(); /* Setup zeroed pages. */ |
ad941989 JL |
81 | |
82 | mem_init_print_info(NULL); | |
6bc9a396 CL |
83 | } |
84 | #endif /* !CONFIG_NEED_MULTIPLE_NODES */ | |
85 | ||
6bc9a396 CL |
86 | #ifdef CONFIG_BLK_DEV_INITRD |
87 | void free_initrd_mem(unsigned long start, unsigned long end) | |
88 | { | |
11199692 JL |
89 | free_reserved_area((void *)start, (void *)end, POISON_FREE_INITMEM, |
90 | "initrd"); | |
6bc9a396 CL |
91 | } |
92 | #endif | |
93 | ||
bd721ea7 | 94 | void __ref free_initmem(void) |
6bc9a396 | 95 | { |
7265d80f | 96 | free_initmem_default(POISON_FREE_INITMEM); |
6bc9a396 CL |
97 | } |
98 | ||
99 | unsigned long pgd_current; | |
100 | ||
101 | #define __page_aligned(order) __attribute__((__aligned__(PAGE_SIZE<<order))) | |
102 | ||
103 | /* | |
104 | * gcc 3.3 and older have trouble determining that PTRS_PER_PGD and PGD_ORDER | |
105 | * are constants. So we use the variants from asm-offset.h until that gcc | |
106 | * will officially be retired. | |
107 | */ | |
d8aa899b | 108 | pgd_t swapper_pg_dir[PTRS_PER_PGD] __page_aligned(PTE_ORDER); |
6bc9a396 | 109 | pte_t invalid_pte_table[PTRS_PER_PTE] __page_aligned(PTE_ORDER); |