mirror of https://gitee.com/openkylin/linux.git
114 lines
2.8 KiB
C
114 lines
2.8 KiB
C
/*
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* linux/arch/cris/mm/init.c
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*
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* Copyright (C) 1995 Linus Torvalds
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* Copyright (C) 2000,2001 Axis Communications AB
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*
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* Authors: Bjorn Wesen (bjornw@axis.com)
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*
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*/
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#include <linux/init.h>
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#include <linux/bootmem.h>
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#include <asm/tlb.h>
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DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
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unsigned long empty_zero_page;
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extern char _stext, _edata, _etext; /* From linkerscript */
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extern char __init_begin, __init_end;
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void
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show_mem(void)
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{
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int i,free = 0,total = 0,cached = 0, reserved = 0, nonshared = 0;
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int shared = 0;
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printk("\nMem-info:\n");
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show_free_areas();
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i = max_mapnr;
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while (i-- > 0) {
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total++;
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if (PageReserved(mem_map+i))
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reserved++;
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else if (PageSwapCache(mem_map+i))
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cached++;
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else if (!page_count(mem_map+i))
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free++;
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else if (page_count(mem_map+i) == 1)
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nonshared++;
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else
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shared += page_count(mem_map+i) - 1;
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}
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printk("%d pages of RAM\n",total);
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printk("%d free pages\n",free);
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printk("%d reserved pages\n",reserved);
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printk("%d pages nonshared\n",nonshared);
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printk("%d pages shared\n",shared);
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printk("%d pages swap cached\n",cached);
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}
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void __init
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mem_init(void)
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{
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int codesize, reservedpages, datasize, initsize;
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unsigned long tmp;
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if(!mem_map)
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BUG();
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/* max/min_low_pfn was set by setup.c
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* now we just copy it to some other necessary places...
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*
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* high_memory was also set in setup.c
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*/
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max_mapnr = num_physpages = max_low_pfn - min_low_pfn;
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/* this will put all memory onto the freelists */
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totalram_pages = free_all_bootmem();
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reservedpages = 0;
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for (tmp = 0; tmp < max_mapnr; tmp++) {
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/*
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* Only count reserved RAM pages
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*/
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if (PageReserved(mem_map + tmp))
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reservedpages++;
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}
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codesize = (unsigned long) &_etext - (unsigned long) &_stext;
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datasize = (unsigned long) &_edata - (unsigned long) &_etext;
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initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin;
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printk(KERN_INFO
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"Memory: %luk/%luk available (%dk kernel code, %dk reserved, %dk data, "
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"%dk init)\n" ,
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(unsigned long) nr_free_pages() << (PAGE_SHIFT-10),
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max_mapnr << (PAGE_SHIFT-10),
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codesize >> 10,
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reservedpages << (PAGE_SHIFT-10),
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datasize >> 10,
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initsize >> 10
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);
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}
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/* free the pages occupied by initialization code */
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void
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free_initmem(void)
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{
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unsigned long addr;
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addr = (unsigned long)(&__init_begin);
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for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) {
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ClearPageReserved(virt_to_page(addr));
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init_page_count(virt_to_page(addr));
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free_page(addr);
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totalram_pages++;
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}
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printk (KERN_INFO "Freeing unused kernel memory: %luk freed\n",
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(unsigned long)((&__init_end - &__init_begin) >> 10));
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}
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