diff options
Diffstat (limited to 'arch/m68k/mm/init_mm.c')
| -rw-r--r-- | arch/m68k/mm/init_mm.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/arch/m68k/mm/init_mm.c b/arch/m68k/mm/init_mm.c new file mode 100644 index 000000000000..8bc842554e5b --- /dev/null +++ b/arch/m68k/mm/init_mm.c @@ -0,0 +1,150 @@ +/* + * 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/module.h> +#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 <linux/gfp.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/sections.h> +#include <asm/tlb.h> + +DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); + +pg_data_t pg_data_map[MAX_NUMNODES]; +EXPORT_SYMBOL(pg_data_map); + +int m68k_virt_to_node_shift; + +#ifndef CONFIG_SINGLE_MEMORY_CHUNK +pg_data_t *pg_data_table[65]; +EXPORT_SYMBOL(pg_data_table); +#endif + +void __init m68k_setup_node(int node) +{ +#ifndef CONFIG_SINGLE_MEMORY_CHUNK + struct mem_info *info = m68k_memory + node; + int i, end; + + i = (unsigned long)phys_to_virt(info->addr) >> __virt_to_node_shift(); + end = (unsigned long)phys_to_virt(info->addr + info->size - 1) >> __virt_to_node_shift(); + for (; i <= end; i++) { + if (pg_data_table[i]) + printk("overlap at %u for chunk %u\n", i, node); + pg_data_table[i] = pg_data_map + node; + } +#endif + pg_data_map[node].bdata = bootmem_node_data + node; + node_set_online(node); +} + + +/* + * ZERO_PAGE is a special page that is used for zero-initialized + * data and COW. + */ + +void *empty_zero_page; +EXPORT_SYMBOL(empty_zero_page); + +extern void init_pointer_table(unsigned long ptable); + +/* References to section boundaries */ + +extern pmd_t *zero_pgtable; + +void __init mem_init(void) +{ + pg_data_t *pgdat; + int codepages = 0; + int datapages = 0; + int initpages = 0; + int i; + +#ifdef CONFIG_ATARI + if (MACH_IS_ATARI) + atari_stram_mem_init_hook(); +#endif + + /* this will put all memory onto the freelists */ + totalram_pages = num_physpages = 0; + for_each_online_pgdat(pgdat) { + num_physpages += pgdat->node_present_pages; + + totalram_pages += free_all_bootmem_node(pgdat); + for (i = 0; i < pgdat->node_spanned_pages; i++) { + struct page *page = pgdat->node_mem_map + i; + char *addr = page_to_virt(page); + + if (!PageReserved(page)) + continue; + if (addr >= _text && + addr < _etext) + codepages++; + else if (addr >= __init_begin && + addr < __init_end) + initpages++; + else + datapages++; + } + } + +#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", + nr_free_pages() << (PAGE_SHIFT-10), + totalram_pages << (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 |