diff options
| -rw-r--r-- | arch/sh/kernel/setup.c | 164 | ||||
| -rw-r--r-- | arch/sh/mm/Kconfig | 11 | ||||
| -rw-r--r-- | arch/sh/mm/init.c | 197 | ||||
| -rw-r--r-- | include/asm-sh/mmu_context.h | 6 | ||||
| -rw-r--r-- | include/asm-sh/page.h | 10 |
5 files changed, 207 insertions, 181 deletions
diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c index 4d6d8911519..60cc2161438 100644 --- a/arch/sh/kernel/setup.c +++ b/arch/sh/kernel/setup.c @@ -4,7 +4,7 @@ * This file handles the architecture-dependent parts of initialization * * Copyright (C) 1999 Niibe Yutaka - * Copyright (C) 2002 - 2006 Paul Mundt + * Copyright (C) 2002 - 2007 Paul Mundt */ #include <linux/screen_info.h> #include <linux/ioport.h> @@ -15,15 +15,18 @@ #include <linux/seq_file.h> #include <linux/root_dev.h> #include <linux/utsname.h> +#include <linux/nodemask.h> #include <linux/cpu.h> #include <linux/pfn.h> #include <linux/fs.h> +#include <linux/mm.h> #include <asm/uaccess.h> #include <asm/io.h> #include <asm/sections.h> #include <asm/irq.h> #include <asm/setup.h> #include <asm/clock.h> +#include <asm/mmu_context.h> extern void * __rd_start, * __rd_end; @@ -202,53 +205,33 @@ static int __init sh_mv_setup(char **cmdline_p) return 0; } -void __init setup_arch(char **cmdline_p) +/* + * Register fully available low RAM pages with the bootmem allocator. + */ +static void __init register_bootmem_low_pages(void) { - unsigned long bootmap_size; - unsigned long start_pfn, max_pfn, max_low_pfn; - -#ifdef CONFIG_CMDLINE_BOOL - strcpy(COMMAND_LINE, CONFIG_CMDLINE); -#endif - - ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV); - -#ifdef CONFIG_BLK_DEV_RAM - rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK; - rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0); - rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0); -#endif - - if (!MOUNT_ROOT_RDONLY) - root_mountflags &= ~MS_RDONLY; - init_mm.start_code = (unsigned long) _text; - init_mm.end_code = (unsigned long) _etext; - init_mm.end_data = (unsigned long) _edata; - init_mm.brk = (unsigned long) _end; - - code_resource.start = (unsigned long)virt_to_phys(_text); - code_resource.end = (unsigned long)virt_to_phys(_etext)-1; - data_resource.start = (unsigned long)virt_to_phys(_etext); - data_resource.end = (unsigned long)virt_to_phys(_edata)-1; - - sh_mv_setup(cmdline_p); - + unsigned long curr_pfn, last_pfn, pages; /* - * Find the highest page frame number we have available + * We are rounding up the start address of usable memory: */ - max_pfn = PFN_DOWN(__pa(memory_end)); + curr_pfn = PFN_UP(__MEMORY_START); /* - * Determine low and high memory ranges: + * ... and at the end of the usable range downwards: */ - max_low_pfn = max_pfn; + last_pfn = PFN_DOWN(__pa(memory_end)); - /* - * Partially used pages are not usable - thus - * we are rounding upwards: - */ - start_pfn = PFN_UP(__pa(_end)); + if (last_pfn > max_low_pfn) + last_pfn = max_low_pfn; + + pages = last_pfn - curr_pfn; + free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages)); +} + +void __init setup_bootmem_allocator(unsigned long start_pfn) +{ + unsigned long bootmap_size; /* * Find a proper area for the bootmem bitmap. After this @@ -256,31 +239,11 @@ void __init setup_arch(char **cmdline_p) * is intact) must be done via bootmem_alloc(). */ bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn, - __MEMORY_START>>PAGE_SHIFT, - max_low_pfn); - /* - * Register fully available low RAM pages with the bootmem allocator. - */ - { - unsigned long curr_pfn, last_pfn, pages; - - /* - * We are rounding up the start address of usable memory: - */ - curr_pfn = PFN_UP(__MEMORY_START); - /* - * ... and at the end of the usable range downwards: - */ - last_pfn = PFN_DOWN(__pa(memory_end)); + min_low_pfn, max_low_pfn); - if (last_pfn > max_low_pfn) - last_pfn = max_low_pfn; - - pages = last_pfn - curr_pfn; - free_bootmem_node(NODE_DATA(0), PFN_PHYS(curr_pfn), - PFN_PHYS(pages)); - } + register_bootmem_low_pages(); + node_set_online(0); /* * Reserve the kernel text and @@ -289,14 +252,14 @@ void __init setup_arch(char **cmdline_p) * case of us accidentally initializing the bootmem allocator with * an invalid RAM area. */ - reserve_bootmem_node(NODE_DATA(0), __MEMORY_START+PAGE_SIZE, + reserve_bootmem(__MEMORY_START+PAGE_SIZE, (PFN_PHYS(start_pfn)+bootmap_size+PAGE_SIZE-1)-__MEMORY_START); /* * reserve physical page 0 - it's a special BIOS page on many boxes, * enabling clean reboots, SMP operation, laptop functions. */ - reserve_bootmem_node(NODE_DATA(0), __MEMORY_START, PAGE_SIZE); + reserve_bootmem(__MEMORY_START, PAGE_SIZE); #ifdef CONFIG_BLK_DEV_INITRD ROOT_DEV = MKDEV(RAMDISK_MAJOR, 0); @@ -310,8 +273,8 @@ void __init setup_arch(char **cmdline_p) if (LOADER_TYPE && INITRD_START) { if (INITRD_START + INITRD_SIZE <= (max_low_pfn << PAGE_SHIFT)) { - reserve_bootmem_node(NODE_DATA(0), INITRD_START + - __MEMORY_START, INITRD_SIZE); + reserve_bootmem(INITRD_START + __MEMORY_START, + INITRD_SIZE); initrd_start = INITRD_START + PAGE_OFFSET + __MEMORY_START; initrd_end = initrd_start + INITRD_SIZE; @@ -324,6 +287,71 @@ void __init setup_arch(char **cmdline_p) } } #endif +} + +#ifndef CONFIG_NEED_MULTIPLE_NODES +static void __init setup_memory(void) +{ + unsigned long start_pfn; + + /* + * Partially used pages are not usable - thus + * we are rounding upwards: + */ + start_pfn = PFN_UP(__pa(_end)); + setup_bootmem_allocator(start_pfn); +} +#else +extern void __init setup_memory(void); +#endif + +void __init setup_arch(char **cmdline_p) +{ + enable_mmu(); + +#ifdef CONFIG_CMDLINE_BOOL + strcpy(COMMAND_LINE, CONFIG_CMDLINE); +#endif + + ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV); + +#ifdef CONFIG_BLK_DEV_RAM + rd_image_start = RAMDISK_FLAGS & RAMDISK_IMAGE_START_MASK; + rd_prompt = ((RAMDISK_FLAGS & RAMDISK_PROMPT_FLAG) != 0); + rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0); +#endif + + if (!MOUNT_ROOT_RDONLY) + root_mountflags &= ~MS_RDONLY; + init_mm.start_code = (unsigned long) _text; + init_mm.end_code = (unsigned long) _etext; + init_mm.end_data = (unsigned long) _edata; + init_mm.brk = (unsigned long) _end; + + code_resource.start = virt_to_phys(_text); + code_resource.end = virt_to_phys(_etext)-1; + data_resource.start = virt_to_phys(_etext); + data_resource.end = virt_to_phys(_edata)-1; + + parse_early_param(); + + sh_mv_setup(cmdline_p); + + /* + * Find the highest page frame number we have available + */ + max_pfn = PFN_DOWN(__pa(memory_end)); + + /* + * Determine low and high memory ranges: + */ + max_low_pfn = max_pfn; + min_low_pfn = __MEMORY_START >> PAGE_SHIFT; + + nodes_clear(node_online_map); + setup_memory(); + paging_init(); + sparse_init(); #ifdef CONFIG_DUMMY_CONSOLE conswitchp = &dummy_con; @@ -332,8 +360,6 @@ void __init setup_arch(char **cmdline_p) /* Perform the machine specific initialisation */ if (likely(sh_mv.mv_setup)) sh_mv.mv_setup(cmdline_p); - - paging_init(); } struct sh_machine_vector* __init get_mv_byname(const char* name) diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig index 3cac22f50e1..5359f3dff93 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 ae957a93237..4d030988b36 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 - diff --git a/include/asm-sh/mmu_context.h b/include/asm-sh/mmu_context.h index 01acaaae975..199662bb35c 100644 --- a/include/asm-sh/mmu_context.h +++ b/include/asm-sh/mmu_context.h @@ -169,6 +169,8 @@ enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk) #define destroy_context(mm) do { } while (0) #define set_asid(asid) do { } while (0) #define get_asid() (0) +#define set_TTB(pgd) do { } while (0) +#define get_TTB() (0) #define activate_context(mm,cpu) do { } while (0) #define switch_mm(prev,next,tsk) do { } while (0) #define deactivate_mm(tsk,mm) do { } while (0) @@ -211,8 +213,8 @@ static inline void disable_mmu(void) * MMU control handlers for processors lacking memory * management hardware. */ -#define enable_mmu() do { BUG(); } while (0) -#define disable_mmu() do { BUG(); } while (0) +#define enable_mmu() do { } while (0) +#define disable_mmu() do { } while (0) #endif #endif /* __KERNEL__ */ diff --git a/include/asm-sh/page.h b/include/asm-sh/page.h index ac4b4677f28..7464de4ba07 100644 --- a/include/asm-sh/page.h +++ b/include/asm-sh/page.h @@ -59,6 +59,7 @@ extern void (*clear_page)(void *to); extern void (*copy_page)(void *to, void *from); extern unsigned long shm_align_mask; +extern unsigned long max_low_pfn, min_low_pfn; #ifdef CONFIG_MMU extern void clear_page_slow(void *to); @@ -124,17 +125,16 @@ typedef struct { unsigned long pgd; } pgd_t; #define PAGE_OFFSET CONFIG_PAGE_OFFSET #define __pa(x) ((unsigned long)(x)-PAGE_OFFSET) #define __va(x) ((void *)((unsigned long)(x)+PAGE_OFFSET)) +#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT) -#define MAP_NR(addr) (((unsigned long)(addr)-PAGE_OFFSET) >> PAGE_SHIFT) - -#define phys_to_page(phys) (mem_map + (((phys)-__MEMORY_START) >> PAGE_SHIFT)) -#define page_to_phys(page) (((page - mem_map) << PAGE_SHIFT) + __MEMORY_START) +#define phys_to_page(phys) (pfn_to_page(phys >> PAGE_SHIFT)) +#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT) /* PFN start number, because of __MEMORY_START */ #define PFN_START (__MEMORY_START >> PAGE_SHIFT) #define ARCH_PFN_OFFSET (PFN_START) #define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT) -#define pfn_valid(pfn) (((pfn) - PFN_START) < max_mapnr) +#define pfn_valid(pfn) ((pfn) >= min_low_pfn && (pfn) < max_low_pfn) #define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT) #define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \ |