From: Haren Myneni <haren@linux.vnet.ibm.com>
To: benh@kernel.crashing.org, paulus@samba.org, anton@samba.org,
mikey@neuling.org
Cc: linuxppc-dev@lists.ozlabs.org
Subject: [PATCH 5/6] powerpc: Macros for saving/restore PPR
Date: Sun, 09 Sep 2012 04:43:21 -0700 [thread overview]
Message-ID: <1347191001.3418.19.camel@hbabu-laptop> (raw)
Several macros are defined for saving and restore user defined PPR value.
Signed-off-by: Haren Myneni <haren@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
next reply other threads:[~2012-09-09 11:43 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-09 11:43 Haren Myneni [this message]
2012-09-10 4:24 ` [PATCH 5/6] powerpc: Macros for saving/restore PPR Benjamin Herrenschmidt
2012-09-11 5:18 ` Haren Myneni
2012-09-11 5:37 ` Benjamin Herrenschmidt
2012-10-31 6:56 Haren Myneni
2012-11-23 3:39 ` Michael Neuling
2012-11-27 1:49 ` Haren Myneni
2012-12-11 2:41 ` Michael Ellerman
2012-12-07 7:50 Haren Myneni
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