diff options
Diffstat (limited to 'arch/sh/mm')
| -rw-r--r-- | arch/sh/mm/Kconfig | 11 | ||||
| -rw-r--r-- | arch/sh/mm/init.c | 197 |
2 files changed, 103 insertions, 105 deletions
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig index 3cac22f..5359f3d 100644 --- a/arch/sh/mm/Kconfig +++ b/arch/sh/mm/Kconfig @@ -291,6 +291,17 @@ config VSYSCALL For systems with an MMU that can afford to give up a page, (the default value) say Y. +config NODES_SHIFT + int + default "1" + depends on NEED_MULTIPLE_NODES + +config ARCH_FLATMEM_ENABLE + def_bool y + +config ARCH_POPULATES_NODE_MAP + def_bool y + choice prompt "Kernel page size" default PAGE_SIZE_4KB diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c index ae957a9..4d03098 100644 --- a/arch/sh/mm/init.c +++ b/arch/sh/mm/init.c @@ -1,37 +1,20 @@ -/* $Id: init.c,v 1.19 2004/02/21 04:42:16 kkojima Exp $ - * - * linux/arch/sh/mm/init.c +/* + * linux/arch/sh/mm/init.c * * Copyright (C) 1999 Niibe Yutaka - * Copyright (C) 2002, 2004 Paul Mundt + * Copyright (C) 2002 - 2007 Paul Mundt * * Based on linux/arch/i386/mm/init.c: * Copyright (C) 1995 Linus Torvalds */ - -#include <linux/signal.h> -#include <linux/sched.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/string.h> -#include <linux/types.h> -#include <linux/ptrace.h> -#include <linux/mman.h> #include <linux/mm.h> #include <linux/swap.h> -#include <linux/smp.h> #include <linux/init.h> -#include <linux/highmem.h> #include <linux/bootmem.h> -#include <linux/pagemap.h> #include <linux/proc_fs.h> -#include <asm/processor.h> -#include <asm/system.h> -#include <asm/uaccess.h> -#include <asm/pgtable.h> -#include <asm/pgalloc.h> +#include <linux/percpu.h> +#include <linux/io.h> #include <asm/mmu_context.h> -#include <asm/io.h> #include <asm/tlb.h> #include <asm/cacheflush.h> #include <asm/cache.h> @@ -39,37 +22,51 @@ DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); pgd_t swapper_pg_dir[PTRS_PER_PGD]; -#ifdef CONFIG_MMU -/* It'd be good if these lines were in the standard header file. */ -#define START_PFN (NODE_DATA(0)->bdata->node_boot_start >> PAGE_SHIFT) -#define MAX_LOW_PFN (NODE_DATA(0)->bdata->node_low_pfn) -#endif - void (*copy_page)(void *from, void *to); void (*clear_page)(void *to); void show_mem(void) { - int i, total = 0, reserved = 0; - int shared = 0, cached = 0; + int total = 0, reserved = 0, free = 0; + int shared = 0, cached = 0, slab = 0; + pg_data_t *pgdat; printk("Mem-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)) - shared += page_count(mem_map+i) - 1; + + for_each_online_pgdat(pgdat) { + struct page *page, *end; + unsigned long flags; + + pgdat_resize_lock(pgdat, &flags); + page = pgdat->node_mem_map; + end = page + pgdat->node_spanned_pages; + + do { + total++; + if (PageReserved(page)) + reserved++; + else if (PageSwapCache(page)) + cached++; + else if (PageSlab(page)) + slab++; + else if (!page_count(page)) + free++; + else + shared += page_count(page) - 1; + page++; + } while (page < end); + + pgdat_resize_unlock(pgdat, &flags); } - printk("%d pages of RAM\n",total); - printk("%d reserved pages\n",reserved); - printk("%d pages shared\n",shared); - printk("%d pages swap cached\n",cached); + + printk("Free swap: %6ldkB\n", nr_swap_pages<<(PAGE_SHIFT-10)); + printk("%d pages of RAM\n", total); + printk("%d free pages\n", free); + printk("%d reserved pages\n", reserved); + printk("%d slab pages\n", slab); + printk("%d pages shared\n", shared); + printk("%d pages swap cached\n", cached); } #ifdef CONFIG_MMU @@ -147,52 +144,38 @@ extern char __init_begin, __init_end; */ void __init paging_init(void) { - unsigned long zones_size[MAX_NR_ZONES] = { 0, }; + int nid; - /* - * Setup some defaults for the zone sizes.. these should be safe - * regardless of distcontiguous memory or MMU settings. - */ - zones_size[ZONE_NORMAL] = __MEMORY_SIZE >> PAGE_SHIFT; -#ifdef CONFIG_HIGHMEM - zones_size[ZONE_HIGHMEM] = 0 >> PAGE_SHIFT; -#endif - -#ifdef CONFIG_MMU - /* - * If we have an MMU, and want to be using it .. we need to adjust - * the zone sizes accordingly, in addition to turning it on. - */ - { - /* We don't need to map the kernel through the TLB, as - * it is permanatly mapped using P1. So clear the - * entire pgd. */ - memset(swapper_pg_dir, 0, sizeof(swapper_pg_dir)); - - /* Turn on the MMU */ - enable_mmu(); - zones_size[ZONE_NORMAL] = MAX_LOW_PFN - START_PFN; - } + /* We don't need to map the kernel through the TLB, as + * it is permanatly mapped using P1. So clear the + * entire pgd. */ + memset(swapper_pg_dir, 0, sizeof(swapper_pg_dir)); /* Set an initial value for the MMU.TTB so we don't have to * check for a null value. */ set_TTB(swapper_pg_dir); -#elif defined(CONFIG_CPU_SH3) || defined(CONFIG_CPU_SH4) - /* - * If we don't have CONFIG_MMU set and the processor in question - * still has an MMU, care needs to be taken to make sure it doesn't - * stay on.. Since the boot loader could have potentially already - * turned it on, and we clearly don't want it, we simply turn it off. - * - * We don't need to do anything special for the zone sizes, since the - * default values that were already configured up above should be - * satisfactory. - */ - disable_mmu(); -#endif - NODE_DATA(0)->node_mem_map = NULL; - free_area_init_node(0, NODE_DATA(0), zones_size, __MEMORY_START >> PAGE_SHIFT, 0); + for_each_online_node(nid) { + pg_data_t *pgdat = NODE_DATA(nid); + unsigned long max_zone_pfns[MAX_NR_ZONES]; + unsigned long low, start_pfn; + + memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); + + start_pfn = pgdat->bdata->node_boot_start >> PAGE_SHIFT; + low = pgdat->bdata->node_low_pfn; + + max_zone_pfns[ZONE_NORMAL] = low; + add_active_range(nid, start_pfn, low); + + printk("Node %u: start_pfn = 0x%lx, low = 0x%lx\n", + nid, start_pfn, low); + + free_area_init_nodes(max_zone_pfns); + + printk("Node %u: mem_map starts at %p\n", + pgdat->node_id, pgdat->node_mem_map); + } } static struct kcore_list kcore_mem, kcore_vmalloc; @@ -200,18 +183,33 @@ static struct kcore_list kcore_mem, kcore_vmalloc; void __init mem_init(void) { int codesize, reservedpages, datasize, initsize; - int tmp; - extern unsigned long memory_start; + int nid; -#ifdef CONFIG_MMU - high_memory = (void *)__va(MAX_LOW_PFN * PAGE_SIZE); -#else - extern unsigned long memory_end; + reservedpages = 0; - high_memory = (void *)(memory_end & PAGE_MASK); -#endif + for_each_online_node(nid) { + pg_data_t *pgdat = NODE_DATA(nid); + unsigned long node_pages = 0; + void *node_high_memory; + int i; + + num_physpages += pgdat->node_present_pages; + + if (pgdat->node_spanned_pages) + node_pages = free_all_bootmem_node(pgdat); + + totalram_pages += node_pages; - max_mapnr = num_physpages = MAP_NR(high_memory) - MAP_NR(memory_start); + for (i = 0; i < node_pages; i++) + if (PageReserved(pgdat->node_mem_map + i)) + reservedpages++; + + node_high_memory = (void *)((pgdat->node_start_pfn + + pgdat->node_spanned_pages) << + PAGE_SHIFT); + if (node_high_memory > high_memory) + high_memory = node_high_memory; + } /* clear the zero-page */ memset(empty_zero_page, 0, PAGE_SIZE); @@ -229,16 +227,6 @@ void __init mem_init(void) clear_page = clear_page_nommu; #endif - /* this will put all low memory onto the freelists */ - totalram_pages += free_all_bootmem_node(NODE_DATA(0)); - reservedpages = 0; - for (tmp = 0; tmp < num_physpages; tmp++) - /* - * Only count reserved RAM pages - */ - if (PageReserved(mem_map+tmp)) - reservedpages++; - codesize = (unsigned long) &_etext - (unsigned long) &_text; datasize = (unsigned long) &_edata - (unsigned long) &_etext; initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin; @@ -250,7 +238,7 @@ void __init mem_init(void) printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, " "%dk reserved, %dk data, %dk init)\n", (unsigned long) nr_free_pages() << (PAGE_SHIFT-10), - max_mapnr << (PAGE_SHIFT-10), + totalram_pages << (PAGE_SHIFT-10), codesize >> 10, reservedpages << (PAGE_SHIFT-10), datasize >> 10, @@ -289,4 +277,3 @@ void free_initrd_mem(unsigned long start, unsigned long end) printk ("Freeing initrd memory: %ldk freed\n", (end - start) >> 10); } #endif - |
