aboutsummaryrefslogtreecommitdiff
path: root/arch/sh/mm/init.c
diff options
context:
space:
mode:
authorPaul Mundt <lethal@linux-sh.org>2006-11-27 12:06:26 +0900
committerPaul Mundt <lethal@linux-sh.org>2006-12-06 10:45:39 +0900
commit510c72ad2dd4e05e6908755f51ac89482c6eb987 (patch)
treefa2e9e9a674e38dd523d937329627560f0bd6b64 /arch/sh/mm/init.c
parent1dc41e58a553e612e3d0349bb60eef08f9462bde (diff)
sh: Fixup various PAGE_SIZE == 4096 assumptions.
There were a number of places that made evil PAGE_SIZE == 4k assumptions that ended up breaking when trying to play with 8k and 64k page sizes, this fixes those up. The most significant change is the way we load THREAD_SIZE, previously this was done via: mov #(THREAD_SIZE >> 8), reg shll8 reg to avoid a memory access and allow the immediate load. With a 64k PAGE_SIZE, we're out of range for the immediate load size without resorting to special instructions available in later ISAs (movi20s and so on). The "workaround" for this is to bump up the shift to 10 and insert a shll2, which gives a bit more flexibility while still being much cheaper than a memory access. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/mm/init.c')
-rw-r--r--arch/sh/mm/init.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index 462bfeac6d9..59f4cc18235 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -217,7 +217,6 @@ static struct kcore_list kcore_mem, kcore_vmalloc;
void __init mem_init(void)
{
- extern unsigned long empty_zero_page[1024];
int codesize, reservedpages, datasize, initsize;
int tmp;
extern unsigned long memory_start;