ad941989d0
Prepare for removing num_physpages and simplify mem_init(). Signed-off-by: Jiang Liu <jiang.liu@huawei.com> Cc: Chen Liqin <liqin.chen@sunplusct.com> Cc: Lennox Wu <lennox.wu@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
109 lines
2.9 KiB
C
109 lines
2.9 KiB
C
/*
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* arch/score/mm/init.c
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*
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* Score Processor version.
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*
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* Copyright (C) 2009 Sunplus Core Technology Co., Ltd.
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* Lennox Wu <lennox.wu@sunplusct.com>
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* Chen Liqin <liqin.chen@sunplusct.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see the file COPYING, or write
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* to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/errno.h>
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#include <linux/bootmem.h>
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#include <linux/kernel.h>
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#include <linux/gfp.h>
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#include <linux/init.h>
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#include <linux/mm.h>
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#include <linux/mman.h>
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#include <linux/pagemap.h>
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#include <linux/kcore.h>
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#include <linux/sched.h>
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#include <linux/initrd.h>
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#include <asm/sections.h>
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#include <asm/tlb.h>
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unsigned long empty_zero_page;
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EXPORT_SYMBOL_GPL(empty_zero_page);
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static void setup_zero_page(void)
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{
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struct page *page;
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empty_zero_page = __get_free_pages(GFP_KERNEL | __GFP_ZERO, 0);
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if (!empty_zero_page)
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panic("Oh boy, that early out of memory?");
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page = virt_to_page((void *) empty_zero_page);
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mark_page_reserved(page);
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}
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#ifndef CONFIG_NEED_MULTIPLE_NODES
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int page_is_ram(unsigned long pagenr)
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{
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if (pagenr >= min_low_pfn && pagenr < max_low_pfn)
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return 1;
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else
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return 0;
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}
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void __init paging_init(void)
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{
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unsigned long max_zone_pfns[MAX_NR_ZONES];
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unsigned long lastpfn;
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pagetable_init();
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max_zone_pfns[ZONE_NORMAL] = max_low_pfn;
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lastpfn = max_low_pfn;
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free_area_init_nodes(max_zone_pfns);
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}
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void __init mem_init(void)
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{
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high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT);
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free_all_bootmem();
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setup_zero_page(); /* Setup zeroed pages. */
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mem_init_print_info(NULL);
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}
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#endif /* !CONFIG_NEED_MULTIPLE_NODES */
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#ifdef CONFIG_BLK_DEV_INITRD
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void free_initrd_mem(unsigned long start, unsigned long end)
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{
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free_reserved_area((void *)start, (void *)end, POISON_FREE_INITMEM,
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"initrd");
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}
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#endif
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void __init_refok free_initmem(void)
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{
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free_initmem_default(POISON_FREE_INITMEM);
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}
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unsigned long pgd_current;
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#define __page_aligned(order) __attribute__((__aligned__(PAGE_SIZE<<order)))
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/*
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* gcc 3.3 and older have trouble determining that PTRS_PER_PGD and PGD_ORDER
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* are constants. So we use the variants from asm-offset.h until that gcc
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* will officially be retired.
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*/
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pgd_t swapper_pg_dir[PTRS_PER_PGD] __page_aligned(PTE_ORDER);
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pte_t invalid_pte_table[PTRS_PER_PTE] __page_aligned(PTE_ORDER);
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