4 * Score Processor version.
6 * Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
7 * Lennox Wu <lennox.wu@sunplusct.com>
8 * Chen Liqin <liqin.chen@sunplusct.com>
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.
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.
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
26 #include <linux/errno.h>
27 #include <linux/bootmem.h>
28 #include <linux/kernel.h>
29 #include <linux/gfp.h>
30 #include <linux/init.h>
32 #include <linux/mman.h>
33 #include <linux/pagemap.h>
34 #include <linux/kcore.h>
35 #include <linux/sched.h>
36 #include <linux/initrd.h>
38 #include <asm/sections.h>
41 unsigned long empty_zero_page
;
42 EXPORT_SYMBOL_GPL(empty_zero_page
);
44 static struct kcore_list kcore_mem
, kcore_vmalloc
;
46 static void setup_zero_page(void)
50 empty_zero_page
= __get_free_pages(GFP_KERNEL
| __GFP_ZERO
, 0);
52 panic("Oh boy, that early out of memory?");
54 page
= virt_to_page((void *) empty_zero_page
);
55 mark_page_reserved(page
);
58 #ifndef CONFIG_NEED_MULTIPLE_NODES
59 int page_is_ram(unsigned long pagenr
)
61 if (pagenr
>= min_low_pfn
&& pagenr
< max_low_pfn
)
67 void __init
paging_init(void)
69 unsigned long max_zone_pfns
[MAX_NR_ZONES
];
70 unsigned long lastpfn
;
73 max_zone_pfns
[ZONE_NORMAL
] = max_low_pfn
;
74 lastpfn
= max_low_pfn
;
75 free_area_init_nodes(max_zone_pfns
);
78 void __init
mem_init(void)
80 unsigned long codesize
, reservedpages
, datasize
, initsize
;
81 unsigned long tmp
, ram
= 0;
83 high_memory
= (void *) __va(max_low_pfn
<< PAGE_SHIFT
);
84 totalram_pages
+= free_all_bootmem();
85 setup_zero_page(); /* Setup zeroed pages. */
88 for (tmp
= 0; tmp
< max_low_pfn
; tmp
++)
89 if (page_is_ram(tmp
)) {
91 if (PageReserved(pfn_to_page(tmp
)))
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
;
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,
106 totalhigh_pages
<< (PAGE_SHIFT
-10));
108 #endif /* !CONFIG_NEED_MULTIPLE_NODES */
110 #ifdef CONFIG_BLK_DEV_INITRD
111 void free_initrd_mem(unsigned long start
, unsigned long end
)
113 free_reserved_area(start
, end
, POISON_FREE_INITMEM
, "initrd");
117 void __init_refok
free_initmem(void)
119 free_initmem_default(POISON_FREE_INITMEM
);
122 unsigned long pgd_current
;
124 #define __page_aligned(order) __attribute__((__aligned__(PAGE_SIZE<<order)))
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.
131 pgd_t swapper_pg_dir
[PTRS_PER_PGD
] __page_aligned(PTE_ORDER
);
132 pte_t invalid_pte_table
[PTRS_PER_PTE
] __page_aligned(PTE_ORDER
);