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Commit 456cad8e authored by David S. Miller's avatar David S. Miller
Browse files

sparc64: Add write_pic() helper. 



It writes the %pic register, keeping mind of processor bugs.

Implement reset_pic() in terms of it.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f9aad600

arch/sparc/include/asm/system_64.h

+5 −4
Original line number Diff line number Diff line
@@ -96,11 +96,12 @@ do { __asm__ __volatile__("ba,pt %%xcc, 1f\n\t" \ 
 * arch/sparc64/kernel/smp.c:smp_percpu_timer_interrupt()

 * for more information.

 */

#define reset_pic()    						\

	__asm__ __volatile__("ba,pt	%xcc, 99f\n\t"		\

#define write_pic(__p)  					\

	__asm__ __volatile__("ba,pt	%%xcc, 99f\n\t"		\

			     ".align	64\n"			\

			  "99:wr	%g0, 0x0, %pic\n\t"	\

			     "rd	%pic, %g0")

			  "99:wr	%0, 0x0, %%pic\n\t"	\

			     "rd	%%pic, %%g0" : : "r" (__p))

#define reset_pic()	write_pic(0)



#ifndef __ASSEMBLY__