/* * linux/arch/m68k/mm/init.c * * Copyright (C) 1995 Hamish Macdonald * * Contains common initialization routines, specific init code moved * to motorola.c and sun3mmu.c */ #include <linux/signal.h> #include <linux/sched.h> #include <linux/mm.h> #include <linux/swap.h> #include <linux/kernel.h> #include <linux/string.h> #include <linux/types.h> #include <linux/init.h> #include <linux/bootmem.h> #include <asm/setup.h> #include <asm/uaccess.h> #include <asm/page.h> #include <asm/pgalloc.h> #include <asm/system.h> #include <asm/machdep.h> #include <asm/io.h> #ifdef CONFIG_ATARI #include <asm/atari_stram.h> #endif #include <asm/tlb.h> DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); /* * ZERO_PAGE is a special page that is used for zero-initialized * data and COW. */ void *empty_zero_page; void show_mem(void) { unsigned long i; int free = 0, total = 0, reserved = 0, shared = 0; int cached = 0; printk("\nMem-info:\n"); show_free_areas(); printk("Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10)); i = max_mapnr; while (i-- > 0) { total++; if (PageReserved(mem_map+i)) reserved++; else if (PageSwapCache(mem_map+i)) cached++; else if (!page_count(mem_map+i)) free++; else shared += page_count(mem_map+i) - 1; } printk("%d pages of RAM\n",total); printk("%d free pages\n",free); printk("%d reserved pages\n",reserved); printk("%d pages shared\n",shared); printk("%d pages swap cached\n",cached); } extern void init_pointer_table(unsigned long ptable); /* References to section boundaries */ extern char _text, _etext, _edata, __bss_start, _end; extern char __init_begin, __init_end; extern pmd_t *zero_pgtable; void __init mem_init(void) { int codepages = 0; int datapages = 0; int initpages = 0; unsigned long tmp; #ifndef CONFIG_SUN3 int i; #endif max_mapnr = num_physpages = (((unsigned long)high_memory - PAGE_OFFSET) >> PAGE_SHIFT); #ifdef CONFIG_ATARI if (MACH_IS_ATARI) atari_stram_mem_init_hook(); #endif /* this will put all memory onto the freelists */ totalram_pages = free_all_bootmem(); for (tmp = PAGE_OFFSET ; tmp < (unsigned long)high_memory; tmp += PAGE_SIZE) { if (PageReserved(virt_to_page(tmp))) { if (tmp >= (unsigned long)&_text && tmp < (unsigned long)&_etext) codepages++; else if (tmp >= (unsigned long) &__init_begin && tmp < (unsigned long) &__init_end) initpages++; else datapages++; continue; } } #ifndef CONFIG_SUN3 /* insert pointer tables allocated so far into the tablelist */ init_pointer_table((unsigned long)kernel_pg_dir); for (i = 0; i < PTRS_PER_PGD; i++) { if (pgd_present(kernel_pg_dir[i])) init_pointer_table(__pgd_page(kernel_pg_dir[i])); } /* insert also pointer table that we used to unmap the zero page */ if (zero_pgtable) init_pointer_table((unsigned long)zero_pgtable); #endif printk("Memory: %luk/%luk available (%dk kernel code, %dk data, %dk init)\n", (unsigned long)nr_free_pages() << (PAGE_SHIFT-10), max_mapnr << (PAGE_SHIFT-10), codepages << (PAGE_SHIFT-10), datapages << (PAGE_SHIFT-10), initpages << (PAGE_SHIFT-10)); } #ifdef CONFIG_BLK_DEV_INITRD void free_initrd_mem(unsigned long start, unsigned long end) { int pages = 0; for (; start < end; start += PAGE_SIZE) { ClearPageReserved(virt_to_page(start)); init_page_count(virt_to_page(start)); free_page(start); totalram_pages++; pages++; } printk ("Freeing initrd memory: %dk freed\n", pages); } #endif