Import of Linux/MIPS 2.1.36

1 files changed, 55 insertions, 0 deletions

diff --git a/include/asm-sparc64/psrcompat.h b/include/asm-sparc64/psrcompat.h
new file mode 100644
index 000000000..dccc4f69a
--- /dev/null
+++ b/include/asm-sparc64/psrcompat.h
@@ -0,0 +1,55 @@
+/* $Id: psrcompat.h,v 1.2 1997/04/07 18:57:17 jj Exp $ */
+#ifndef _SPARC64_PSRCOMPAT_H
+#define _SPARC64_PSRCOMPAT_H
+
+#include <asm/pstate.h>
+
+/* Old 32-bit PSR fields for the compatability 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_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   */
+
+extern inline unsigned int tstate_to_psr(unsigned long tstate)
+{
+	unsigned int psr;
+	unsigned long vers;
+
+	/* These fields are in the same place. */
+	psr  = (tstate & (TSTATE_CWP | TSTATE_PEF));
+
+	/* This is what the user would have always seen. */
+	psr |= PSR_S;
+
+	/* Slam in the 32-bit condition codes. */
+	psr |= ((tstate & TSTATE_ICC) >> 12);
+
+	/* This is completely arbitrary. */
+	__asm__ __volatile__("rdpr	%%ver, %0" : "=r" (vers));
+	psr |= ((vers << 8) >> 32) & PSR_IMPL;
+	psr |= ((vers << 24) >> 36) & PSR_VERS;
+
+	return psr;
+}
+
+extern inline unsigned long psr_to_tstate_icc(unsigned int psr)
+{
+	unsigned long tstate;
+
+	tstate = (psr & PSR_ICC) << 12;
+
+	return tstate;
+}
+
+#endif /* !(_SPARC64_PSRCOMPAT_H) */