1 files changed, 72 insertions, 0 deletions
diff --git a/c/src/lib/libcpu/powerpc/shared/spr.h b/c/src/lib/libcpu/powerpc/shared/spr.h
new file mode 100644
index 0000000000..0111576226
--- /dev/null
+++ b/c/src/lib/libcpu/powerpc/shared/spr.h
@@ -0,0 +1,72 @@
+/*
+ *  include/asm-ppc/spr.h -- Access to special purpose registers.
+ *
+ *  Copyright (C) 1998 Gabriel Paubert, paubert@iram.es
+ *
+ *  This file is subject to the terms and conditions of the GNU General Public
+ *  License.  See the file COPYING in the main directory of this archive
+ *  for more details.
+ */
+
+
+#ifndef _PPC_SPR_H
+#define _PPC_SPR_H
+
+#include <libcpu/cpu.h> 
+
+#define __MFSPR(reg, val) \
+	__asm__ __volatile__("mfspr %0,"#reg : "=r" (val))
+
+#define __MTSPR(val, reg) \
+	__asm__ __volatile__("mtspr "#reg",%0" : : "r" (val))
+
+
+#define SPR_RW(reg) \
+static inline unsigned long _read_##reg(void) \
+{\
+	unsigned long val;\
+	__MFSPR(reg, val);\
+	return val;\
+}\
+static inline void _write_##reg(unsigned long val)\
+{\
+	__MTSPR(val,reg);\
+	return;\
+}
+
+#define SPR_RO(reg) \
+static inline unsigned long _read_##reg(void) \
+{\
+	unsigned long val;\
+	__MFSPR(reg,val);\
+	return val;\
+}
+
+static inline unsigned long _read_MSR(void)
+{
+	unsigned long val;
+	asm volatile("mfmsr %0" : "=r" (val));
+	return val;
+} 
+
+static inline void _write_MSR(unsigned long val)
+{
+	asm volatile("mtmsr %0" : : "r" (val));
+	return;
+}
+
+static inline unsigned long _read_SR(void * va)
+{
+	unsigned long val;
+	asm volatile("mfsrin %0,%1" : "=r" (val): "r" (va));
+	return val;
+} 
+
+static inline void _write_SR(unsigned long val, void * va)
+{
+	asm volatile("mtsrin %0,%1" : : "r"(val), "r" (va): "memory");
+	return;
+}
+
+
+#endif