1 files changed, 45 insertions, 0 deletions

diff --git a/arch/sparc/include/asm/psrcompat.h b/arch/sparc/include/asm/psrcompat.h
new file mode 100644
index 000000000000..44b6327dbbf5
--- /dev/null
+++ b/arch/sparc/include/asm/psrcompat.h
@@ -0,0 +1,45 @@
+#ifndef _SPARC64_PSRCOMPAT_H
+#define _SPARC64_PSRCOMPAT_H
+
+#include <asm/pstate.h>
+
+/* Old 32-bit PSR fields for the compatibility conversion code. */
+#define PSR_CWP     0x0000001f         /* current window pointer     */
+#define PSR_ET      0x00000020         /* enable traps field         */
+#define PSR_PS      0x00000040         /* previous privilege level   */
+#define PSR_S       0x00000080         /* current privilege level    */
+#define PSR_PIL     0x00000f00         /* processor interrupt level  */
+#define PSR_EF      0x00001000         /* enable floating point      */
+#define PSR_EC      0x00002000         /* enable co-processor        */
+#define PSR_SYSCALL 0x00004000         /* inside of a syscall        */
+#define PSR_LE      0x00008000         /* SuperSparcII little-endian */
+#define PSR_ICC     0x00f00000         /* integer condition codes    */
+#define PSR_C       0x00100000         /* carry bit                  */
+#define PSR_V       0x00200000         /* overflow bit               */
+#define PSR_Z       0x00400000         /* zero bit                   */
+#define PSR_N       0x00800000         /* negative bit               */
+#define PSR_VERS    0x0f000000         /* cpu-version field          */
+#define PSR_IMPL    0xf0000000         /* cpu-implementation field   */
+
+#define PSR_V8PLUS  0xff000000         /* fake impl/ver, meaning a 64bit CPU is present */
+#define PSR_XCC     0x000f0000         /* if PSR_V8PLUS, this is %xcc */
+
+static inline unsigned int tstate_to_psr(unsigned long tstate)
+{
+        return ((tstate & TSTATE_CWP)                   |
+                PSR_S                                   |
+                ((tstate & TSTATE_ICC) >> 12)           |
+                ((tstate & TSTATE_XCC) >> 20)           |
+                ((tstate & TSTATE_SYSCALL) ? PSR_SYSCALL : 0) |
+                PSR_V8PLUS);
+}
+
+static inline unsigned long psr_to_tstate_icc(unsigned int psr)
+{
+        unsigned long tstate = ((unsigned long)(psr & PSR_ICC)) << 12;
+        if ((psr & (PSR_VERS|PSR_IMPL)) == PSR_V8PLUS)
+                tstate |= ((unsigned long)(psr & PSR_XCC)) << 20;
+        return tstate;
+}
+
+#endif /* !(_SPARC64_PSRCOMPAT_H) */