Hi,

the patch below selects AT91RM9200 asynchronous clock mode which improves the execution speed by a factor of ~4.

Cheers Anders

Signed-off-by: Anders Larsen alarsen@rea.de

CHANGELOG: Patch by Anders Larsen alarsen@rea.de, 2005-05-03 Set AT91RM9200 asynchronous clocking mode

---

cpu/arm920t/at91rm9200/lowlevel_init.S | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/cpu/arm920t/at91rm9200/lowlevel_init.S b/cpu/arm920t/at91rm9200/lowlevel_init.S --- a/cpu/arm920t/at91rm9200/lowlevel_init.S +++ b/cpu/arm920t/at91rm9200/lowlevel_init.S @@ -123,6 +123,11 @@ LoopOsc: cmp r2, r0 bne 2b

+ /* switch from FastBus to Asynchronous Clocking Mode */ + mrc p15, 0, r0, c1, c0, 0 + orr r0, r0, #0xC0000000 @ set bit 31 (iA) and 30 (nF) + mcr p15, 0, r0, c1, c0, 0 + /* everything is fine now */ mov pc, lr