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Commit 685a694f authored by Mike Frysinger's avatar Mike Frysinger
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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: default avatarMike Frysinger <vapier@gentoo.org>
parent f1db88d2

arch/blackfin/kernel/early_printk.c

+3 −13
Original line number Diff line number Diff line
@@ -178,25 +178,15 @@ int __init setup_early_printk(char *buf) 


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