menu "Kernel hacking"
+config TRACE_IRQFLAGS_SUPPORT
+ bool
+ default y
+
source "lib/Kconfig.debug"
config CROSSCOMPILE
RESTORE_AT
RESTORE_STATIC
FEXPORT(restore_partial) # restore partial frame
+#ifdef CONFIG_TRACE_IRQFLAGS
+ SAVE_STATIC
+ SAVE_AT
+ SAVE_TEMP
+ LONG_L v0, PT_STATUS(sp)
+ and v0, 1
+ beqz v0, 1f
+ jal trace_hardirqs_on
+ b 2f
+1: jal trace_hardirqs_off
+2:
+ RESTORE_TEMP
+ RESTORE_AT
+ RESTORE_STATIC
+#endif
RESTORE_SOME
RESTORE_SP_AND_RET
.set at
#include <asm/asm.h>
#include <asm/errno.h>
+#include <asm/irqflags.h>
#include <asm/mipsregs.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
LONG_S $31, GDB_FR_REG31(sp)
CLI /* disable interrupts */
+ TRACE_IRQS_OFF
/*
* Followed by the floating point registers
#include <asm/asm.h>
#include <asm/asmmacro.h>
#include <asm/cacheops.h>
+#include <asm/irqflags.h>
#include <asm/regdef.h>
#include <asm/fpregdef.h>
#include <asm/mipsregs.h>
NESTED(handle_int, PT_SIZE, sp)
SAVE_ALL
CLI
+ TRACE_IRQS_OFF
PTR_LA ra, ret_from_irq
move a0, sp
_ehb
#endif /* CONFIG_MIPS_MT_SMTC */
CLI
+ TRACE_IRQS_OFF
move a0, sp
jalr v0
j ret_from_irq
.endm
.macro __build_clear_sti
+ TRACE_IRQS_ON
STI
.endm
.macro __build_clear_cli
CLI
+ TRACE_IRQS_OFF
.endm
.macro __build_clear_fpe
li a2, ~(0x3f << 12)
and a2, a1
ctc1 a2, fcr31
+ TRACE_IRQS_ON
STI
.endm
*
* Copyright (C) 1994, 1995 Waldorf Electronics
* Written by Ralf Baechle and Andreas Busse
- * Copyright (C) 1994, 95, 96, 97, 98, 99, 2003 Ralf Baechle
+ * Copyright (C) 1994 - 99, 2003, 06 Ralf Baechle
* Copyright (C) 1996 Paul M. Antoine
* Modified for DECStation and hence R3000 support by Paul M. Antoine
* Further modifications by David S. Miller and Harald Koerfgen
#include <asm/asm.h>
#include <asm/asmmacro.h>
+#include <asm/irqflags.h>
#include <asm/regdef.h>
#include <asm/page.h>
#include <asm/mipsregs.h>
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
- * Copyright (C) 1995, 96, 97, 98, 99, 2000, 01, 02 by Ralf Baechle
+ * Copyright (C) 1995-99, 2000- 02, 06 Ralf Baechle <ralf@linux-mips.org>
* Copyright (C) 2001 MIPS Technologies, Inc.
* Copyright (C) 2004 Thiemo Seufer
*/
#include <linux/errno.h>
#include <asm/asm.h>
#include <asm/asmmacro.h>
+#include <asm/irqflags.h>
#include <asm/mipsregs.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
NESTED(handle_sys, PT_SIZE, sp)
.set noat
SAVE_SOME
+#ifdef CONFIG_TRACE_IRQFLAGS
+ TRACE_IRQS_ON
+#ifdef CONFIG_64BIT
+ LONG_L $8, PT_R8(sp)
+ LONG_L $9, PT_R9(sp)
+#endif
+ LONG_L $7, PT_R7(sp)
+ LONG_L $6, PT_R6(sp)
+ LONG_L $5, PT_R5(sp)
+ LONG_L $4, PT_R4(sp)
+ LONG_L $2, PT_R2(sp)
+#endif
STI
.set at
#include <linux/errno.h>
#include <asm/asm.h>
#include <asm/asmmacro.h>
+#include <asm/irqflags.h>
#include <asm/mipsregs.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
*/
.set noat
SAVE_SOME
+ TRACE_IRQS_ON
STI
.set at
#endif
#include <linux/errno.h>
#include <asm/asm.h>
#include <asm/asmmacro.h>
+#include <asm/irqflags.h>
#include <asm/mipsregs.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
#ifndef CONFIG_MIPS32_O32
.set noat
SAVE_SOME
+ TRACE_IRQS_ON
STI
.set at
#endif
#include <linux/errno.h>
#include <asm/asm.h>
#include <asm/asmmacro.h>
+#include <asm/irqflags.h>
#include <asm/mipsregs.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
NESTED(handle_sys, PT_SIZE, sp)
.set noat
SAVE_SOME
+ TRACE_IRQS_ON
STI
.set at
ld t1, PT_EPC(sp) # skip syscall on return
/* Save all will redundantly recompute the SP, but use it for now */
SAVE_ALL
CLI
+ TRACE_IRQS_OFF
move a0,sp
/* Function to be invoked passed stack pad slot 5 */
lw t0,PT_PADSLOT5(sp)
#ifndef _ASM_ATOMIC_H
#define _ASM_ATOMIC_H
+#include <linux/irqflags.h>
#include <asm/cpu-features.h>
-#include <asm/interrupt.h>
#include <asm/war.h>
typedef struct { volatile int counter; } atomic_t;
#ifdef __KERNEL__
-#include <asm/interrupt.h>
+#include <linux/irqflags.h>
#include <asm/sgidefs.h>
#include <asm/war.h>
+++ /dev/null
-/*
- * 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) 1994, 95, 96, 97, 98, 99, 2003 by Ralf Baechle
- * Copyright (C) 1996 by Paul M. Antoine
- * Copyright (C) 1999 Silicon Graphics
- * Copyright (C) 2000 MIPS Technologies, Inc.
- */
-#ifndef _ASM_INTERRUPT_H
-#define _ASM_INTERRUPT_H
-
-#include <asm/hazards.h>
-
-__asm__ (
- " .macro local_irq_enable \n"
- " .set push \n"
- " .set reorder \n"
- " .set noat \n"
-#ifdef CONFIG_MIPS_MT_SMTC
- " mfc0 $1, $2, 1 # SMTC - clear TCStatus.IXMT \n"
- " ori $1, 0x400 \n"
- " xori $1, 0x400 \n"
- " mtc0 $1, $2, 1 \n"
-#elif defined(CONFIG_CPU_MIPSR2)
- " ei \n"
-#else
- " mfc0 $1,$12 \n"
- " ori $1,0x1f \n"
- " xori $1,0x1e \n"
- " mtc0 $1,$12 \n"
-#endif
- " irq_enable_hazard \n"
- " .set pop \n"
- " .endm");
-
-static inline void local_irq_enable(void)
-{
- __asm__ __volatile__(
- "local_irq_enable"
- : /* no outputs */
- : /* no inputs */
- : "memory");
-}
-
-/*
- * For cli() we have to insert nops to make sure that the new value
- * has actually arrived in the status register before the end of this
- * macro.
- * R4000/R4400 need three nops, the R4600 two nops and the R10000 needs
- * no nops at all.
- */
-/*
- * For TX49, operating only IE bit is not enough.
- *
- * If mfc0 $12 follows store and the mfc0 is last instruction of a
- * page and fetching the next instruction causes TLB miss, the result
- * of the mfc0 might wrongly contain EXL bit.
- *
- * ERT-TX49H2-027, ERT-TX49H3-012, ERT-TX49HL3-006, ERT-TX49H4-008
- *
- * Workaround: mask EXL bit of the result or place a nop before mfc0.
- */
-__asm__ (
- " .macro local_irq_disable\n"
- " .set push \n"
- " .set noat \n"
-#ifdef CONFIG_MIPS_MT_SMTC
- " mfc0 $1, $2, 1 \n"
- " ori $1, 0x400 \n"
- " .set noreorder \n"
- " mtc0 $1, $2, 1 \n"
-#elif defined(CONFIG_CPU_MIPSR2)
- " di \n"
-#else
- " mfc0 $1,$12 \n"
- " ori $1,0x1f \n"
- " xori $1,0x1f \n"
- " .set noreorder \n"
- " mtc0 $1,$12 \n"
-#endif
- " irq_disable_hazard \n"
- " .set pop \n"
- " .endm \n");
-
-static inline void local_irq_disable(void)
-{
- __asm__ __volatile__(
- "local_irq_disable"
- : /* no outputs */
- : /* no inputs */
- : "memory");
-}
-
-__asm__ (
- " .macro local_save_flags flags \n"
- " .set push \n"
- " .set reorder \n"
-#ifdef CONFIG_MIPS_MT_SMTC
- " mfc0 \\flags, $2, 1 \n"
-#else
- " mfc0 \\flags, $12 \n"
-#endif
- " .set pop \n"
- " .endm \n");
-
-#define local_save_flags(x) \
-__asm__ __volatile__( \
- "local_save_flags %0" \
- : "=r" (x))
-
-__asm__ (
- " .macro local_irq_save result \n"
- " .set push \n"
- " .set reorder \n"
- " .set noat \n"
-#ifdef CONFIG_MIPS_MT_SMTC
- " mfc0 \\result, $2, 1 \n"
- " ori $1, \\result, 0x400 \n"
- " .set noreorder \n"
- " mtc0 $1, $2, 1 \n"
- " andi \\result, \\result, 0x400 \n"
-#elif defined(CONFIG_CPU_MIPSR2)
- " di \\result \n"
- " andi \\result, 1 \n"
-#else
- " mfc0 \\result, $12 \n"
- " ori $1, \\result, 0x1f \n"
- " xori $1, 0x1f \n"
- " .set noreorder \n"
- " mtc0 $1, $12 \n"
-#endif
- " irq_disable_hazard \n"
- " .set pop \n"
- " .endm \n");
-
-#define local_irq_save(x) \
-__asm__ __volatile__( \
- "local_irq_save\t%0" \
- : "=r" (x) \
- : /* no inputs */ \
- : "memory")
-
-__asm__ (
- " .macro local_irq_restore flags \n"
- " .set push \n"
- " .set noreorder \n"
- " .set noat \n"
-#ifdef CONFIG_MIPS_MT_SMTC
- "mfc0 $1, $2, 1 \n"
- "andi \\flags, 0x400 \n"
- "ori $1, 0x400 \n"
- "xori $1, 0x400 \n"
- "or \\flags, $1 \n"
- "mtc0 \\flags, $2, 1 \n"
-#elif defined(CONFIG_CPU_MIPSR2) && defined(CONFIG_IRQ_CPU)
- /*
- * Slow, but doesn't suffer from a relativly unlikely race
- * condition we're having since days 1.
- */
- " beqz \\flags, 1f \n"
- " di \n"
- " ei \n"
- "1: \n"
-#elif defined(CONFIG_CPU_MIPSR2)
- /*
- * Fast, dangerous. Life is fun, life is good.
- */
- " mfc0 $1, $12 \n"
- " ins $1, \\flags, 0, 1 \n"
- " mtc0 $1, $12 \n"
-#else
- " mfc0 $1, $12 \n"
- " andi \\flags, 1 \n"
- " ori $1, 0x1f \n"
- " xori $1, 0x1f \n"
- " or \\flags, $1 \n"
- " mtc0 \\flags, $12 \n"
-#endif
- " irq_disable_hazard \n"
- " .set pop \n"
- " .endm \n");
-
-#define local_irq_restore(flags) \
-do { \
- unsigned long __tmp1; \
- \
- __asm__ __volatile__( \
- "local_irq_restore\t%0" \
- : "=r" (__tmp1) \
- : "0" (flags) \
- : "memory"); \
-} while(0)
-
-static inline int irqs_disabled(void)
-{
-#ifdef CONFIG_MIPS_MT_SMTC
- /*
- * SMTC model uses TCStatus.IXMT to disable interrupts for a thread/CPU
- */
- unsigned long __result;
-
- __asm__ __volatile__(
- " .set noreorder \n"
- " mfc0 %0, $2, 1 \n"
- " andi %0, 0x400 \n"
- " slt %0, $0, %0 \n"
- " .set reorder \n"
- : "=r" (__result));
-
- return __result;
-#else
- unsigned long flags;
- local_save_flags(flags);
-
- return !(flags & 1);
-#endif
-}
-
-#endif /* _ASM_INTERRUPT_H */
--- /dev/null
+/*
+ * 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) 1994, 95, 96, 97, 98, 99, 2003 by Ralf Baechle
+ * Copyright (C) 1996 by Paul M. Antoine
+ * Copyright (C) 1999 Silicon Graphics
+ * Copyright (C) 2000 MIPS Technologies, Inc.
+ */
+#ifndef _ASM_IRQFLAGS_H
+#define _ASM_IRQFLAGS_H
+
+#ifndef __ASSEMBLY__
+
+#include <asm/hazards.h>
+
+__asm__ (
+ " .macro raw_local_irq_enable \n"
+ " .set push \n"
+ " .set reorder \n"
+ " .set noat \n"
+#ifdef CONFIG_MIPS_MT_SMTC
+ " mfc0 $1, $2, 1 # SMTC - clear TCStatus.IXMT \n"
+ " ori $1, 0x400 \n"
+ " xori $1, 0x400 \n"
+ " mtc0 $1, $2, 1 \n"
+#elif defined(CONFIG_CPU_MIPSR2)
+ " ei \n"
+#else
+ " mfc0 $1,$12 \n"
+ " ori $1,0x1f \n"
+ " xori $1,0x1e \n"
+ " mtc0 $1,$12 \n"
+#endif
+ " irq_enable_hazard \n"
+ " .set pop \n"
+ " .endm");
+
+static inline void raw_local_irq_enable(void)
+{
+ __asm__ __volatile__(
+ "raw_local_irq_enable"
+ : /* no outputs */
+ : /* no inputs */
+ : "memory");
+}
+
+/*
+ * For cli() we have to insert nops to make sure that the new value
+ * has actually arrived in the status register before the end of this
+ * macro.
+ * R4000/R4400 need three nops, the R4600 two nops and the R10000 needs
+ * no nops at all.
+ */
+/*
+ * For TX49, operating only IE bit is not enough.
+ *
+ * If mfc0 $12 follows store and the mfc0 is last instruction of a
+ * page and fetching the next instruction causes TLB miss, the result
+ * of the mfc0 might wrongly contain EXL bit.
+ *
+ * ERT-TX49H2-027, ERT-TX49H3-012, ERT-TX49HL3-006, ERT-TX49H4-008
+ *
+ * Workaround: mask EXL bit of the result or place a nop before mfc0.
+ */
+__asm__ (
+ " .macro raw_local_irq_disable\n"
+ " .set push \n"
+ " .set noat \n"
+#ifdef CONFIG_MIPS_MT_SMTC
+ " mfc0 $1, $2, 1 \n"
+ " ori $1, 0x400 \n"
+ " .set noreorder \n"
+ " mtc0 $1, $2, 1 \n"
+#elif defined(CONFIG_CPU_MIPSR2)
+ " di \n"
+#else
+ " mfc0 $1,$12 \n"
+ " ori $1,0x1f \n"
+ " xori $1,0x1f \n"
+ " .set noreorder \n"
+ " mtc0 $1,$12 \n"
+#endif
+ " irq_disable_hazard \n"
+ " .set pop \n"
+ " .endm \n");
+
+static inline void raw_local_irq_disable(void)
+{
+ __asm__ __volatile__(
+ "raw_local_irq_disable"
+ : /* no outputs */
+ : /* no inputs */
+ : "memory");
+}
+
+__asm__ (
+ " .macro raw_local_save_flags flags \n"
+ " .set push \n"
+ " .set reorder \n"
+#ifdef CONFIG_MIPS_MT_SMTC
+ " mfc0 \\flags, $2, 1 \n"
+#else
+ " mfc0 \\flags, $12 \n"
+#endif
+ " .set pop \n"
+ " .endm \n");
+
+#define raw_local_save_flags(x) \
+__asm__ __volatile__( \
+ "raw_local_save_flags %0" \
+ : "=r" (x))
+
+__asm__ (
+ " .macro raw_local_irq_save result \n"
+ " .set push \n"
+ " .set reorder \n"
+ " .set noat \n"
+#ifdef CONFIG_MIPS_MT_SMTC
+ " mfc0 \\result, $2, 1 \n"
+ " ori $1, \\result, 0x400 \n"
+ " .set noreorder \n"
+ " mtc0 $1, $2, 1 \n"
+ " andi \\result, \\result, 0x400 \n"
+#elif defined(CONFIG_CPU_MIPSR2)
+ " di \\result \n"
+ " andi \\result, 1 \n"
+#else
+ " mfc0 \\result, $12 \n"
+ " ori $1, \\result, 0x1f \n"
+ " xori $1, 0x1f \n"
+ " .set noreorder \n"
+ " mtc0 $1, $12 \n"
+#endif
+ " irq_disable_hazard \n"
+ " .set pop \n"
+ " .endm \n");
+
+#define raw_local_irq_save(x) \
+__asm__ __volatile__( \
+ "raw_local_irq_save\t%0" \
+ : "=r" (x) \
+ : /* no inputs */ \
+ : "memory")
+
+__asm__ (
+ " .macro raw_local_irq_restore flags \n"
+ " .set push \n"
+ " .set noreorder \n"
+ " .set noat \n"
+#ifdef CONFIG_MIPS_MT_SMTC
+ "mfc0 $1, $2, 1 \n"
+ "andi \\flags, 0x400 \n"
+ "ori $1, 0x400 \n"
+ "xori $1, 0x400 \n"
+ "or \\flags, $1 \n"
+ "mtc0 \\flags, $2, 1 \n"
+#elif defined(CONFIG_CPU_MIPSR2) && defined(CONFIG_IRQ_CPU)
+ /*
+ * Slow, but doesn't suffer from a relativly unlikely race
+ * condition we're having since days 1.
+ */
+ " beqz \\flags, 1f \n"
+ " di \n"
+ " ei \n"
+ "1: \n"
+#elif defined(CONFIG_CPU_MIPSR2)
+ /*
+ * Fast, dangerous. Life is fun, life is good.
+ */
+ " mfc0 $1, $12 \n"
+ " ins $1, \\flags, 0, 1 \n"
+ " mtc0 $1, $12 \n"
+#else
+ " mfc0 $1, $12 \n"
+ " andi \\flags, 1 \n"
+ " ori $1, 0x1f \n"
+ " xori $1, 0x1f \n"
+ " or \\flags, $1 \n"
+ " mtc0 \\flags, $12 \n"
+#endif
+ " irq_disable_hazard \n"
+ " .set pop \n"
+ " .endm \n");
+
+#define raw_local_irq_restore(flags) \
+do { \
+ unsigned long __tmp1; \
+ \
+ __asm__ __volatile__( \
+ "raw_local_irq_restore\t%0" \
+ : "=r" (__tmp1) \
+ : "0" (flags) \
+ : "memory"); \
+} while(0)
+
+static inline int raw_irqs_disabled_flags(unsigned long flags)
+{
+#ifdef CONFIG_MIPS_MT_SMTC
+ /*
+ * SMTC model uses TCStatus.IXMT to disable interrupts for a thread/CPU
+ */
+ return flags & 0x400;
+#else
+ return !(flags & 1);
+#endif
+}
+
+#endif
+
+/*
+ * Do the CPU's IRQ-state tracing from assembly code.
+ */
+#ifdef CONFIG_TRACE_IRQFLAGS
+# define TRACE_IRQS_ON \
+ jal trace_hardirqs_on
+# define TRACE_IRQS_OFF \
+ jal trace_hardirqs_off
+#else
+# define TRACE_IRQS_ON
+# define TRACE_IRQS_OFF
+#endif
+
+#endif /* _ASM_IRQFLAGS_H */
#else /* SMTC versions that manage MT scheduling */
-#include <asm/interrupt.h>
+#include <linux/irqflags.h>
/*
* This is a duplicate of dmt() in mipsmtregs.h to avoid problems with
#define _ASM_SYSTEM_H
#include <linux/types.h>
+#include <linux/irqflags.h>
#include <asm/addrspace.h>
#include <asm/cpu-features.h>
#include <asm/dsp.h>
#include <asm/ptrace.h>
#include <asm/war.h>
-#include <asm/interrupt.h>
/*
* read_barrier_depends - Flush all pending reads that subsequents reads
projects / openwrt / staging / blogic.git / commitdiff