summaryrefslogtreecommitdiffstats
path: root/arch/mips/include/asm/paccess.h
diff options
context:
space:
mode:
authorLen Brown <len.brown@intel.com>2008-10-22 23:57:26 -0400
committerLen Brown <len.brown@intel.com>2008-10-23 00:11:07 -0400
commit057316cc6a5b521b332a1d7ccc871cd60c904c74 (patch)
tree4333e608da237c73ff69b10878025cca96dcb4c8 /arch/mips/include/asm/paccess.h
parent3e2dab9a1c2deb03c311eb3f83466009147ed4d3 (diff)
parent2515ddc6db8eb49a79f0fe5e67ff09ac7c81eab4 (diff)
Merge branch 'linus' into test
Conflicts: MAINTAINERS arch/x86/kernel/acpi/boot.c arch/x86/kernel/acpi/sleep.c drivers/acpi/Kconfig drivers/pnp/Makefile drivers/pnp/quirks.c Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'arch/mips/include/asm/paccess.h')
-rw-r--r--arch/mips/include/asm/paccess.h112
1 files changed, 112 insertions, 0 deletions
diff --git a/arch/mips/include/asm/paccess.h b/arch/mips/include/asm/paccess.h
new file mode 100644
index 00000000000..c2394f8b0fe
--- /dev/null
+++ b/arch/mips/include/asm/paccess.h
@@ -0,0 +1,112 @@
+/*
+ * 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.
+ *
+ * Copyright (C) 1996, 1997, 1998, 1999, 2000 by Ralf Baechle
+ * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ *
+ * Protected memory access. Used for everything that might take revenge
+ * by sending a DBE error like accessing possibly non-existant memory or
+ * devices.
+ */
+#ifndef _ASM_PACCESS_H
+#define _ASM_PACCESS_H
+
+#include <linux/errno.h>
+
+#ifdef CONFIG_32BIT
+#define __PA_ADDR ".word"
+#endif
+#ifdef CONFIG_64BIT
+#define __PA_ADDR ".dword"
+#endif
+
+extern asmlinkage void handle_ibe(void);
+extern asmlinkage void handle_dbe(void);
+
+#define put_dbe(x, ptr) __put_dbe((x), (ptr), sizeof(*(ptr)))
+#define get_dbe(x, ptr) __get_dbe((x), (ptr), sizeof(*(ptr)))
+
+struct __large_pstruct { unsigned long buf[100]; };
+#define __mp(x) (*(struct __large_pstruct *)(x))
+
+#define __get_dbe(x, ptr, size) \
+({ \
+ long __gu_err; \
+ __typeof__(*(ptr)) __gu_val; \
+ unsigned long __gu_addr; \
+ __asm__("":"=r" (__gu_val)); \
+ __gu_addr = (unsigned long) (ptr); \
+ __asm__("":"=r" (__gu_err)); \
+ switch (size) { \
+ case 1: __get_dbe_asm("lb"); break; \
+ case 2: __get_dbe_asm("lh"); break; \
+ case 4: __get_dbe_asm("lw"); break; \
+ case 8: __get_dbe_asm("ld"); break; \
+ default: __get_dbe_unknown(); break; \
+ } \
+ x = (__typeof__(*(ptr))) __gu_val; \
+ __gu_err; \
+})
+
+#define __get_dbe_asm(insn) \
+{ \
+ __asm__ __volatile__( \
+ "1:\t" insn "\t%1,%2\n\t" \
+ "move\t%0,$0\n" \
+ "2:\n\t" \
+ ".section\t.fixup,\"ax\"\n" \
+ "3:\tli\t%0,%3\n\t" \
+ "move\t%1,$0\n\t" \
+ "j\t2b\n\t" \
+ ".previous\n\t" \
+ ".section\t__dbe_table,\"a\"\n\t" \
+ __PA_ADDR "\t1b, 3b\n\t" \
+ ".previous" \
+ :"=r" (__gu_err), "=r" (__gu_val) \
+ :"o" (__mp(__gu_addr)), "i" (-EFAULT)); \
+}
+
+extern void __get_dbe_unknown(void);
+
+#define __put_dbe(x, ptr, size) \
+({ \
+ long __pu_err; \
+ __typeof__(*(ptr)) __pu_val; \
+ long __pu_addr; \
+ __pu_val = (x); \
+ __pu_addr = (long) (ptr); \
+ __asm__("":"=r" (__pu_err)); \
+ switch (size) { \
+ case 1: __put_dbe_asm("sb"); break; \
+ case 2: __put_dbe_asm("sh"); break; \
+ case 4: __put_dbe_asm("sw"); break; \
+ case 8: __put_dbe_asm("sd"); break; \
+ default: __put_dbe_unknown(); break; \
+ } \
+ __pu_err; \
+})
+
+#define __put_dbe_asm(insn) \
+{ \
+ __asm__ __volatile__( \
+ "1:\t" insn "\t%1,%2\n\t" \
+ "move\t%0,$0\n" \
+ "2:\n\t" \
+ ".section\t.fixup,\"ax\"\n" \
+ "3:\tli\t%0,%3\n\t" \
+ "j\t2b\n\t" \
+ ".previous\n\t" \
+ ".section\t__dbe_table,\"a\"\n\t" \
+ __PA_ADDR "\t1b, 3b\n\t" \
+ ".previous" \
+ : "=r" (__pu_err) \
+ : "r" (__pu_val), "o" (__mp(__pu_addr)), "i" (-EFAULT)); \
+}
+
+extern void __put_dbe_unknown(void);
+
+extern unsigned long search_dbe_table(unsigned long addr);
+
+#endif /* _ASM_PACCESS_H */