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 void setup_zero_page(void)
48 empty_zero_page
= __get_free_pages(GFP_KERNEL
| __GFP_ZERO
, 0);
50 panic("Oh boy, that early out of memory?");
52 page
= virt_to_page((void *) empty_zero_page
);
53 mark_page_reserved(page
);
56 #ifndef CONFIG_NEED_MULTIPLE_NODES
57 int page_is_ram(unsigned long pagenr
)
59 if (pagenr
>= min_low_pfn
&& pagenr
< max_low_pfn
)
65 void __init
paging_init(void)
67 unsigned long max_zone_pfns
[MAX_NR_ZONES
];
68 unsigned long lastpfn
;
71 max_zone_pfns
[ZONE_NORMAL
] = max_low_pfn
;
72 lastpfn
= max_low_pfn
;
73 free_area_init_nodes(max_zone_pfns
);
76 void __init
mem_init(void)
78 high_memory
= (void *) __va(max_low_pfn
<< PAGE_SHIFT
);
80 setup_zero_page(); /* Setup zeroed pages. */
82 mem_init_print_info(NULL
);
84 #endif /* !CONFIG_NEED_MULTIPLE_NODES */
86 #ifdef CONFIG_BLK_DEV_INITRD
87 void free_initrd_mem(unsigned long start
, unsigned long end
)
89 free_reserved_area((void *)start
, (void *)end
, POISON_FREE_INITMEM
,
94 void __ref
free_initmem(void)
96 free_initmem_default(POISON_FREE_INITMEM
);
99 unsigned long pgd_current
;
101 #define __page_aligned(order) __attribute__((__aligned__(PAGE_SIZE<<order)))
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.
108 pgd_t swapper_pg_dir
[PTRS_PER_PGD
] __page_aligned(PTE_ORDER
);
109 pte_t invalid_pte_table
[PTRS_PER_PTE
] __page_aligned(PTE_ORDER
);