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authorPaul Mundt <lethal@linux-sh.org>2007-05-23 17:48:36 +0900
committerPaul Mundt <lethal@hera.kernel.org>2007-06-08 02:43:43 +0000
commitdfbb9042801eaeb4df9015bb86224291a39a0f52 (patch)
treefc762c923fbc48bd724e648ccb415307ba17086c /arch/sh/mm
parent5900711ad7173b1cf3ee72eb21572e20b263ca0d (diff)
downloadlinux-2.6.34-ux500-dfbb9042801eaeb4df9015bb86224291a39a0f52.tar.gz
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 <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/mm')
-rw-r--r--arch/sh/mm/Kconfig10
-rw-r--r--arch/sh/mm/init.c29
2 files changed, 16 insertions, 23 deletions
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index 00f64c41edb..46fd212b3ed 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 e0e644ff320..1589466f9f8 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);