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Commit 5149bed8 authored by Daniel Hellstrom's avatar Daniel Hellstrom Committed by David S. Miller
Browse files

sparc32,leon: added some SMP comments 



Signed-off-by: default avatarDaniel Hellstrom <daniel@gaisler.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 970def65

arch/sparc/include/asm/smp_32.h

+5 −0
Original line number Diff line number Diff line
@@ -135,6 +135,11 @@ static inline int hard_smp_processor_id(void) 
		__asm__ __volatile__("lda [%g0] ASI_M_VIKING_TMP1, %0\n\t"

				     "nop; nop" :

				     "=&r" (cpuid));

		     - leon

		__asm__ __volatile__(	"rd %asr17, %0\n\t"

					"srl %0, 0x1c, %0\n\t"

					"nop\n\t" :

					"=&r" (cpuid));

	   See btfixup.h and btfixupprep.c to understand how a blackbox works.

	 */

	__asm__ __volatile__("sethi %%hi(___b_hard_smp_processor_id), %0\n\t"

arch/sparc/include/asm/winmacro.h

+9 −0
Original line number Diff line number Diff line
@@ -103,6 +103,7 @@ 
        st       %scratch, [%cur_reg + TI_W_SAVED];



#ifdef CONFIG_SMP

/* Results of LOAD_CURRENT() after BTFIXUP for SUN4M, SUN4D & LEON (comments) */

#define LOAD_CURRENT4M(dest_reg, idreg) \

        rd       %tbr, %idreg; \

	sethi    %hi(current_set), %dest_reg; \
@@ -118,6 +119,14 @@ 
	or	%dest_reg, %lo(C_LABEL(current_set)), %dest_reg; \

	ld	[%idreg + %dest_reg], %dest_reg;



#define LOAD_CURRENT_LEON(dest_reg, idreg)			\

	rd	%asr17, %idreg;					\

	sethi	%hi(current_set), %dest_reg;			\

	srl	%idreg, 0x1c, %idreg;				\

	or	%dest_reg, %lo(current_set), %dest_reg;		\

	sll	%idreg, 0x2, %idreg;				\

	ld	[%idreg + %dest_reg], %dest_reg;



/* Blackbox - take care with this... - check smp4m and smp4d before changing this. */

#define LOAD_CURRENT(dest_reg, idreg) 					\

	sethi	 %hi(___b_load_current), %idreg;			\