Several macros are defined for saving and restore user defined PPR value.
Signed-off-by: Haren Myneni <ha...@us.ibm.com>
---
arch/powerpc/include/asm/exception-64s.h | 35 ++++++++++++++++++++++++++++++
arch/powerpc/include/asm/reg.h | 1 +
2 files changed, 36 insertions(+)
diff --git a/arch/powerpc/include/asm/exception-64s.h
b/arch/powerpc/include/asm/exception-64s.h
index bfd3f1f..618fd18 100644
--- a/arch/powerpc/include/asm/exception-64s.h
+++ b/arch/powerpc/include/asm/exception-64s.h
@@ -62,6 +62,41 @@
#define EXC_HV H
#define EXC_STD
+/*
+ * PPR save/restore macros - Used on P7 or later processors
+ */
+#define SAVE_PPR(area, ra, rb) \
+BEGIN_FTR_SECTION_NESTED(940) \
+ ld ra,area+EX_PPR(r13); /* Read PPR from paca */ \
+ clrrdi rb,r1,THREAD_SHIFT; /* thread_info struct */ \
+ std ra,TI_PPR(rb); /* Save PPR in thread_info */ \
+END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,940)
+
+#define RESTORE_PPR(ra,rb) \
+BEGIN_FTR_SECTION_NESTED(941) \
+ clrrdi ra,r1,THREAD_SHIFT; \
+ ld rb,TI_PPR(ra); /* Read PPR from thread_info */ \
+ mtspr SPRN_PPR,rb; /* Restore PPR */ \
+END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,941)
+
+#define RESTORE_PPR_PACA(area,ra) \
+BEGIN_FTR_SECTION_NESTED(942) \
+ ld ra,area+EX_PPR(r13); \
+ mtspr SPRN_PPR,ra; \
+END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,942)
+
+#define HMT_MEDIUM_NO_PPR \
+BEGIN_FTR_SECTION_NESTED(944) \
+ HMT_MEDIUM; \
+END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,0,944) /*non P7*/
+
+#define HMT_MEDIUM_HAS_PPR(area, ra) \
+BEGIN_FTR_SECTION_NESTED(943) \
+ mfspr ra,SPRN_PPR; \
+ std ra,area+EX_PPR(r13); \
+ HMT_MEDIUM; \
+END_FTR_SECTION_NESTED(CPU_FTR_HAS_PPR,CPU_FTR_HAS_PPR,943) /* P7 */
+
#define __EXCEPTION_PROLOG_1(area, extra, vec) \
GET_PACA(r13); \
std r9,area+EX_R9(r13); /* save r9 - r12 */ \
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index 6386086..dff2f89 100644
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h
@@ -284,6 +284,7 @@
#define SPRN_DBAT6U 0x23C /* Data BAT 6 Upper Register */
#define SPRN_DBAT7L 0x23F /* Data BAT 7 Lower Register */
#define SPRN_DBAT7U 0x23E /* Data BAT 7 Upper Register */
+#define SPRN_PPR 0x380 /* SMT Thread status Register */
#define SPRN_DEC 0x016 /* Decrement Register */
#define SPRN_DER 0x095 /* Debug Enable Regsiter */
--
1.7.10.4
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