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sh: sparsemem support.

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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>
This commit is contained in:
Paul Mundt
2007-05-23 17:48:36 +09:00
committed by Paul Mundt
parent 5900711ad7
commit dfbb904280
4 changed files with 38 additions and 25 deletions
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10
arch/sh/mm/Kconfig
View File

@@ -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

29
arch/sh/mm/init.c
View File

@@ -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);