Module Name: src
Committed By: macallan
Date: Fri Jun 1 18:18:11 UTC 2018
Modified Files:
src/sys/arch/powerpc/include/oea: spr.h
Log Message:
add functions to access SCOM registers on 970 CPUs
To generate a diff of this commit:
cvs rdiff -u -r1.5 -r1.6 src/sys/arch/powerpc/include/oea/spr.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/powerpc/include/oea/spr.h
diff -u src/sys/arch/powerpc/include/oea/spr.h:1.5 src/sys/arch/powerpc/include/oea/spr.h:1.6
--- src/sys/arch/powerpc/include/oea/spr.h:1.5 Fri May 4 16:57:14 2018
+++ src/sys/arch/powerpc/include/oea/spr.h Fri Jun 1 18:18:11 2018
@@ -1,8 +1,17 @@
-/* $NetBSD: spr.h,v 1.5 2018/05/04 16:57:14 macallan Exp $ */
+/* $NetBSD: spr.h,v 1.6 2018/06/01 18:18:11 macallan Exp $ */
#ifndef _POWERPC_OEA_SPR_H_
#define _POWERPC_OEA_SPR_H_
+#if !defined(_LOCORE) && defined(_KERNEL)
+#if defined(PPC_OEA64_BRIDGE) || defined (_ARCH_PPC64)
+
+#include <powerpc/psl.h>
+#include <powerpc/spr.h>
+
+#endif
+#endif
+
/*
* Special Purpose Register declarations.
*
@@ -299,4 +308,50 @@
#define PMCN_TBLTRANS 3 /* TBL bit transitions */
#define PCMN_IDISPATCH 4 /* Instructions dispatched */
+#if !defined(_LOCORE) && defined(_KERNEL)
+
+#if defined(PPC_OEA64_BRIDGE) || defined (_ARCH_PPC64)
+
+static inline uint64_t
+scom_read(register_t address)
+{
+ register_t msr;
+ uint64_t ret;
+
+ msr = mfmsr();
+ mtmsr(msr & ~PSL_EE);
+ __asm volatile("isync;");
+
+ mtspr(SPR_SCOMC, address | SCOMC_READ);
+ __asm volatile("isync;");
+
+ ret = mfspr(SPR_SCOMD);
+ mtmsr(msr);
+ __asm volatile("isync;");
+
+ return ret;
+}
+
+static inline void
+scom_write(register_t address, uint64_t data)
+{
+ register_t msr;
+
+ msr = mfmsr();
+ mtmsr(msr & ~PSL_EE);
+ __asm volatile("isync;");
+
+ mtspr(SPR_SCOMD, data);
+ __asm volatile("isync;");
+ mtspr(SPR_SCOMC, address | SCOMC_WRITE);
+ __asm volatile("isync;");
+
+ mtmsr(msr);
+ __asm volatile("isync;");
+}
+
+#endif /* defined(PPC_OEA64_BRIDGE) || defined (_ARCH_PPC64) */
+
+#endif /* !defined(_LOCORE) && defined(_KERNEL) */
+
#endif /* !_POWERPC_SPR_H_ */
