| /* |
| * 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/traps.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> |
| |
| /* |
| * ZERO_PAGE is a special page that is used for zero-initialized |
| * data and COW. |
| */ |
| void *empty_zero_page; |
| EXPORT_SYMBOL(empty_zero_page); |
| |
| #ifdef CONFIG_MMU |
| |
| 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); |
| } |
| |
| extern void init_pointer_table(unsigned long ptable); |
| extern pmd_t *zero_pgtable; |
| |
| #else /* CONFIG_MMU */ |
| |
| /* |
| * paging_init() continues the virtual memory environment setup which |
| * was begun by the code in arch/head.S. |
| * The parameters are pointers to where to stick the starting and ending |
| * addresses of available kernel virtual memory. |
| */ |
| void __init paging_init(void) |
| { |
| /* |
| * Make sure start_mem is page aligned, otherwise bootmem and |
| * page_alloc get different views of the world. |
| */ |
| unsigned long end_mem = memory_end & PAGE_MASK; |
| unsigned long zones_size[MAX_NR_ZONES] = { 0, }; |
| |
| high_memory = (void *) end_mem; |
| |
| empty_zero_page = alloc_bootmem_pages(PAGE_SIZE); |
| memset(empty_zero_page, 0, PAGE_SIZE); |
| |
| /* |
| * Set up SFC/DFC registers (user data space). |
| */ |
| set_fs (USER_DS); |
| |
| zones_size[ZONE_DMA] = (end_mem - PAGE_OFFSET) >> PAGE_SHIFT; |
| free_area_init(zones_size); |
| } |
| |
| #endif /* CONFIG_MMU */ |
| |
| void free_initmem(void) |
| { |
| #ifndef CONFIG_MMU_SUN3 |
| unsigned long addr; |
| |
| addr = (unsigned long) __init_begin; |
| for (; addr < ((unsigned long) __init_end); addr += PAGE_SIZE) { |
| ClearPageReserved(virt_to_page(addr)); |
| init_page_count(virt_to_page(addr)); |
| free_page(addr); |
| totalram_pages++; |
| } |
| pr_notice("Freeing unused kernel memory: %luk freed (0x%x - 0x%x)\n", |
| (addr - (unsigned long) __init_begin) >> 10, |
| (unsigned int) __init_begin, (unsigned int) __init_end); |
| #endif /* CONFIG_MMU_SUN3 */ |
| } |
| |
| #if defined(CONFIG_MMU) && !defined(CONFIG_COLDFIRE) |
| #define VECTORS &vectors[0] |
| #else |
| #define VECTORS _ramvec |
| #endif |
| |
| void __init print_memmap(void) |
| { |
| #define UL(x) ((unsigned long) (x)) |
| #define MLK(b, t) UL(b), UL(t), (UL(t) - UL(b)) >> 10 |
| #define MLM(b, t) UL(b), UL(t), (UL(t) - UL(b)) >> 20 |
| #define MLK_ROUNDUP(b, t) b, t, DIV_ROUND_UP(((t) - (b)), 1024) |
| |
| pr_notice("Virtual kernel memory layout:\n" |
| " vector : 0x%08lx - 0x%08lx (%4ld KiB)\n" |
| " kmap : 0x%08lx - 0x%08lx (%4ld MiB)\n" |
| " vmalloc : 0x%08lx - 0x%08lx (%4ld MiB)\n" |
| " lowmem : 0x%08lx - 0x%08lx (%4ld MiB)\n" |
| " .init : 0x%p" " - 0x%p" " (%4d KiB)\n" |
| " .text : 0x%p" " - 0x%p" " (%4d KiB)\n" |
| " .data : 0x%p" " - 0x%p" " (%4d KiB)\n" |
| " .bss : 0x%p" " - 0x%p" " (%4d KiB)\n", |
| MLK(VECTORS, VECTORS + 256), |
| MLM(KMAP_START, KMAP_END), |
| MLM(VMALLOC_START, VMALLOC_END), |
| MLM(PAGE_OFFSET, (unsigned long)high_memory), |
| MLK_ROUNDUP(__init_begin, __init_end), |
| MLK_ROUNDUP(_stext, _etext), |
| MLK_ROUNDUP(_sdata, _edata), |
| MLK_ROUNDUP(__bss_start, __bss_stop)); |
| } |
| |
| void __init mem_init(void) |
| { |
| pg_data_t *pgdat; |
| int codepages = 0; |
| int datapages = 0; |
| int initpages = 0; |
| int i; |
| |
| /* 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++; |
| } |
| } |
| |
| #if !defined(CONFIG_SUN3) && !defined(CONFIG_COLDFIRE) |
| /* 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 |
| |
| pr_info("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)); |
| print_memmap(); |
| } |
| |
| #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++; |
| } |
| pr_notice("Freeing initrd memory: %dk freed\n", |
| pages << (PAGE_SHIFT - 10)); |
| } |
| #endif |