Blackfin: convert early_printk EVT init to a loop
The EVT registers are all contiguous in the memory map, so using a loop to
initialize them all rather than hardcoding the list results in much better
generated code (a hardware loop rather than a whole bunch of individual
loads).
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/blackfin/kernel/early_printk.c b/arch/blackfin/kernel/early_printk.c
index c8ad051..3302719 100644
--- a/arch/blackfin/kernel/early_printk.c
+++ b/arch/blackfin/kernel/early_printk.c
@@ -178,25 +178,15 @@
asmlinkage void __init init_early_exception_vectors(void)
{
+ u32 evt;
SSYNC();
/* cannot program in software:
* evt0 - emulation (jtag)
* evt1 - reset
*/
- bfin_write_EVT2(early_trap);
- bfin_write_EVT3(early_trap);
- bfin_write_EVT5(early_trap);
- bfin_write_EVT6(early_trap);
- bfin_write_EVT7(early_trap);
- bfin_write_EVT8(early_trap);
- bfin_write_EVT9(early_trap);
- bfin_write_EVT10(early_trap);
- bfin_write_EVT11(early_trap);
- bfin_write_EVT12(early_trap);
- bfin_write_EVT13(early_trap);
- bfin_write_EVT14(early_trap);
- bfin_write_EVT15(early_trap);
+ for (evt = EVT2; evt <= EVT15; evt += 4)
+ bfin_write32(evt, early_trap);
CSYNC();
/* Set all the return from interrupt, exception, NMI to a known place