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authorSam Ravnborg <sam@ravnborg.org>2008-07-27 23:00:59 +0200
committerSam Ravnborg <sam@ravnborg.org>2008-07-27 23:00:59 +0200
commita439fe51a1f8eb087c22dd24d69cebae4a3addac (patch)
treee32d1fa97a220ab598d8ab364205817c5bf2bd6f /arch/sparc/include/asm/psr.h
parent837b41b5de356aa67abb2cadb5eef3efc7776f91 (diff)
sparc, sparc64: use arch/sparc/include
The majority of this patch was created by the following script: *** ASM=arch/sparc/include/asm mkdir -p $ASM git mv include/asm-sparc64/ftrace.h $ASM git rm include/asm-sparc64/* git mv include/asm-sparc/* $ASM sed -ie 's/asm-sparc64/asm/g' $ASM/* sed -ie 's/asm-sparc/asm/g' $ASM/* *** The rest was an update of the top-level Makefile to use sparc for header files when sparc64 is being build. And a small fixlet to pick up the correct unistd.h from sparc64 code. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Diffstat (limited to 'arch/sparc/include/asm/psr.h')
-rw-r--r--arch/sparc/include/asm/psr.h93
1 files changed, 93 insertions, 0 deletions
diff --git a/arch/sparc/include/asm/psr.h b/arch/sparc/include/asm/psr.h
new file mode 100644
index 00000000000..b8c0e5f0a66
--- /dev/null
+++ b/arch/sparc/include/asm/psr.h
@@ -0,0 +1,93 @@
+/*
+ * psr.h: This file holds the macros for masking off various parts of
+ * the processor status register on the Sparc. This is valid
+ * for Version 8. On the V9 this is renamed to the PSTATE
+ * register and its members are accessed as fields like
+ * PSTATE.PRIV for the current CPU privilege level.
+ *
+ * Copyright (C) 1994 David S. Miller (davem@caip.rutgers.edu)
+ */
+
+#ifndef __LINUX_SPARC_PSR_H
+#define __LINUX_SPARC_PSR_H
+
+/* The Sparc PSR fields are laid out as the following:
+ *
+ * ------------------------------------------------------------------------
+ * | impl | vers | icc | resv | EC | EF | PIL | S | PS | ET | CWP |
+ * | 31-28 | 27-24 | 23-20 | 19-14 | 13 | 12 | 11-8 | 7 | 6 | 5 | 4-0 |
+ * ------------------------------------------------------------------------
+ */
+#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 */
+
+#ifdef __KERNEL__
+
+#ifndef __ASSEMBLY__
+/* Get the %psr register. */
+static inline unsigned int get_psr(void)
+{
+ unsigned int psr;
+ __asm__ __volatile__(
+ "rd %%psr, %0\n\t"
+ "nop\n\t"
+ "nop\n\t"
+ "nop\n\t"
+ : "=r" (psr)
+ : /* no inputs */
+ : "memory");
+
+ return psr;
+}
+
+static inline void put_psr(unsigned int new_psr)
+{
+ __asm__ __volatile__(
+ "wr %0, 0x0, %%psr\n\t"
+ "nop\n\t"
+ "nop\n\t"
+ "nop\n\t"
+ : /* no outputs */
+ : "r" (new_psr)
+ : "memory", "cc");
+}
+
+/* Get the %fsr register. Be careful, make sure the floating point
+ * enable bit is set in the %psr when you execute this or you will
+ * incur a trap.
+ */
+
+extern unsigned int fsr_storage;
+
+static inline unsigned int get_fsr(void)
+{
+ unsigned int fsr = 0;
+
+ __asm__ __volatile__(
+ "st %%fsr, %1\n\t"
+ "ld %1, %0\n\t"
+ : "=r" (fsr)
+ : "m" (fsr_storage));
+
+ return fsr;
+}
+
+#endif /* !(__ASSEMBLY__) */
+
+#endif /* (__KERNEL__) */
+
+#endif /* !(__LINUX_SPARC_PSR_H) */