From dfbb9042801eaeb4df9015bb86224291a39a0f52 Mon Sep 17 00:00:00 2001 From: Paul Mundt Date: Wed, 23 May 2007 17:48:36 +0900 Subject: [PATCH] sh: sparsemem support. This implements basic sparsemem support for SH. Presently this only uses static sparsemem, and we still permit explicit selection of flatmem. Those boards that want sparsemem can select it as usual. Signed-off-by: Paul Mundt --- arch/sh/kernel/setup.c | 8 ++++++-- arch/sh/mm/Kconfig | 10 ++++++++++ arch/sh/mm/init.c | 29 ++++++----------------------- include/asm-sh/sparsemem.h | 16 ++++++++++++++++ 4 files changed, 38 insertions(+), 25 deletions(-) create mode 100644 include/asm-sh/sparsemem.h diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c index 6f1ea9b33374..3241a6274b81 100644 --- a/arch/sh/kernel/setup.c +++ b/arch/sh/kernel/setup.c @@ -128,6 +128,7 @@ void __init setup_bootmem_allocator(unsigned long start_pfn) bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn, min_low_pfn, max_low_pfn); + add_active_range(0, min_low_pfn, max_low_pfn); register_bootmem_low_pages(); node_set_online(0); @@ -192,6 +193,7 @@ static void __init setup_memory(void) */ start_pfn = PFN_UP(__pa(_end)); setup_bootmem_allocator(start_pfn); + sparse_memory_present_with_active_regions(0); } #else extern void __init setup_memory(void); @@ -250,8 +252,9 @@ void __init setup_arch(char **cmdline_p) min_low_pfn = __MEMORY_START >> PAGE_SHIFT; nodes_clear(node_online_map); + + /* Setup bootmem with available RAM */ setup_memory(); - paging_init(); sparse_init(); #ifdef CONFIG_DUMMY_CONSOLE @@ -261,8 +264,9 @@ 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(); +} static const char *cpu_name[] = { [CPU_SH7206] = "SH7206", [CPU_SH7619] = "SH7619", diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig index 00f64c41edba..46fd212b3ed6 100644 --- a/arch/sh/mm/Kconfig +++ b/arch/sh/mm/Kconfig @@ -300,6 +300,13 @@ config NODES_SHIFT config ARCH_FLATMEM_ENABLE def_bool y +config ARCH_SPARSEMEM_ENABLE + def_bool y + select SPARSEMEM_STATIC + +config ARCH_SPARSEMEM_DEFAULT + def_bool y + config MAX_ACTIVE_REGIONS int default "1" @@ -307,6 +314,9 @@ config MAX_ACTIVE_REGIONS config ARCH_POPULATES_NODE_MAP def_bool y +config ARCH_SELECT_MEMORY_MODEL + 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 e0e644ff3204..1589466f9f87 100644 --- a/arch/sh/mm/init.c +++ b/arch/sh/mm/init.c @@ -36,14 +36,11 @@ void show_mem(void) show_free_areas(); for_each_online_pgdat(pgdat) { - struct page *page, *end; - unsigned long flags; + unsigned long flags, i; pgdat_resize_lock(pgdat, &flags); - page = pgdat->node_mem_map; - end = page + pgdat->node_spanned_pages; - - do { + for (i = 0; i < pgdat->node_spanned_pages; i++) { + struct page *page = pgdat_page_nr(pgdat, i); total++; if (PageReserved(page)) reserved++; @@ -55,9 +52,7 @@ void show_mem(void) free++; else shared += page_count(page) - 1; - page++; - } while (page < end); - + } pgdat_resize_unlock(pgdat, &flags); } @@ -169,15 +164,11 @@ void __init paging_init(void) 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); } } @@ -185,16 +176,13 @@ static struct kcore_list kcore_mem, kcore_vmalloc; void __init mem_init(void) { - int codesize, reservedpages, datasize, initsize; + int codesize, datasize, initsize; int nid; - reservedpages = 0; - 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; @@ -203,10 +191,6 @@ void __init mem_init(void) totalram_pages += node_pages; - 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); @@ -239,11 +223,10 @@ void __init mem_init(void) VMALLOC_END - VMALLOC_START); printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, " - "%dk reserved, %dk data, %dk init)\n", + "%dk data, %dk init)\n", (unsigned long) nr_free_pages() << (PAGE_SHIFT-10), totalram_pages << (PAGE_SHIFT-10), codesize >> 10, - reservedpages << (PAGE_SHIFT-10), datasize >> 10, initsize >> 10); diff --git a/include/asm-sh/sparsemem.h b/include/asm-sh/sparsemem.h new file mode 100644 index 000000000000..547a540b6667 --- /dev/null +++ b/include/asm-sh/sparsemem.h @@ -0,0 +1,16 @@ +#ifndef __ASM_SH_SPARSEMEM_H +#define __ASM_SH_SPARSEMEM_H + +#ifdef __KERNEL__ +/* + * SECTION_SIZE_BITS 2^N: how big each section will be + * MAX_PHYSADDR_BITS 2^N: how much physical address space we have + * MAX_PHYSMEM_BITS 2^N: how much memory we can have in that space + */ +#define SECTION_SIZE_BITS 26 +#define MAX_PHYSADDR_BITS 32 +#define MAX_PHYSMEM_BITS 32 + +#endif + +#endif /* __ASM_SH_SPARSEMEM_H */ -- GitLab