[MIPS] TRACE_IRQFLAGS_SUPPORT support.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/Kconfig.debug b/arch/mips/Kconfig.debug
index 515f9e6..5d6afb5 100644
--- a/arch/mips/Kconfig.debug
+++ b/arch/mips/Kconfig.debug
@@ -1,5 +1,9 @@
menu "Kernel hacking"
+config TRACE_IRQFLAGS_SUPPORT
+ bool
+ default y
+
source "lib/Kconfig.debug"
config CROSSCOMPILE
diff --git a/arch/mips/kernel/entry.S b/arch/mips/kernel/entry.S
index 01e7fa8..766655f 100644
--- a/arch/mips/kernel/entry.S
+++ b/arch/mips/kernel/entry.S
@@ -113,6 +113,21 @@
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
diff --git a/arch/mips/kernel/gdb-low.S b/arch/mips/kernel/gdb-low.S
index 666bc90..2c44606 100644
--- a/arch/mips/kernel/gdb-low.S
+++ b/arch/mips/kernel/gdb-low.S
@@ -7,6 +7,7 @@
#include <asm/asm.h>
#include <asm/errno.h>
+#include <asm/irqflags.h>
#include <asm/mipsregs.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>
@@ -120,6 +121,7 @@
LONG_S $31, GDB_FR_REG31(sp)
CLI /* disable interrupts */
+ TRACE_IRQS_OFF
/*
* Followed by the floating point registers
diff --git a/arch/mips/kernel/genex.S b/arch/mips/kernel/genex.S
index b563811..37fda3d 100644
--- a/arch/mips/kernel/genex.S
+++ b/arch/mips/kernel/genex.S
@@ -13,6 +13,7 @@
#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>
@@ -128,6 +129,7 @@
NESTED(handle_int, PT_SIZE, sp)
SAVE_ALL
CLI
+ TRACE_IRQS_OFF
PTR_LA ra, ret_from_irq
move a0, sp
@@ -216,6 +218,7 @@
_ehb
#endif /* CONFIG_MIPS_MT_SMTC */
CLI
+ TRACE_IRQS_OFF
move a0, sp
jalr v0
j ret_from_irq
@@ -288,11 +291,13 @@
.endm
.macro __build_clear_sti
+ TRACE_IRQS_ON
STI
.endm
.macro __build_clear_cli
CLI
+ TRACE_IRQS_OFF
.endm
.macro __build_clear_fpe
@@ -300,6 +305,7 @@
li a2, ~(0x3f << 12)
and a2, a1
ctc1 a2, fcr31
+ TRACE_IRQS_ON
STI
.endm
diff --git a/arch/mips/kernel/head.S b/arch/mips/kernel/head.S
index 476c1eb..8c6db0f 100644
--- a/arch/mips/kernel/head.S
+++ b/arch/mips/kernel/head.S
@@ -5,7 +5,7 @@
*
* 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
@@ -18,6 +18,7 @@
#include <asm/asm.h>
#include <asm/asmmacro.h>
+#include <asm/irqflags.h>
#include <asm/regdef.h>
#include <asm/page.h>
#include <asm/mipsregs.h>
diff --git a/arch/mips/kernel/scall32-o32.S b/arch/mips/kernel/scall32-o32.S
index c8e5f9c..ba1bcd8 100644
--- a/arch/mips/kernel/scall32-o32.S
+++ b/arch/mips/kernel/scall32-o32.S
@@ -3,13 +3,14 @@
* 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>
@@ -27,6 +28,18 @@
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
diff --git a/arch/mips/kernel/scall64-64.S b/arch/mips/kernel/scall64-64.S
index 809fd1b..939e172d 100644
--- a/arch/mips/kernel/scall64-64.S
+++ b/arch/mips/kernel/scall64-64.S
@@ -10,6 +10,7 @@
#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>
@@ -33,6 +34,7 @@
*/
.set noat
SAVE_SOME
+ TRACE_IRQS_ON
STI
.set at
#endif
diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S
index b2b5cb9..98abbc5 100644
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -10,6 +10,7 @@
#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>
@@ -32,6 +33,7 @@
#ifndef CONFIG_MIPS32_O32
.set noat
SAVE_SOME
+ TRACE_IRQS_ON
STI
.set at
#endif
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 3a138dc..505c9ee 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -16,6 +16,7 @@
#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>
@@ -27,6 +28,7 @@
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
diff --git a/arch/mips/kernel/smtc-asm.S b/arch/mips/kernel/smtc-asm.S
index 72c6d98..4cc3dea 100644
--- a/arch/mips/kernel/smtc-asm.S
+++ b/arch/mips/kernel/smtc-asm.S
@@ -96,6 +96,7 @@
/* 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)
diff --git a/include/asm-mips/atomic.h b/include/asm-mips/atomic.h
index 13d44e1..e64abc0 100644
--- a/include/asm-mips/atomic.h
+++ b/include/asm-mips/atomic.h
@@ -22,8 +22,8 @@
#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;
diff --git a/include/asm-mips/bitops.h b/include/asm-mips/bitops.h
index 098cec2..1bb89c5 100644
--- a/include/asm-mips/bitops.h
+++ b/include/asm-mips/bitops.h
@@ -31,7 +31,7 @@
#ifdef __KERNEL__
-#include <asm/interrupt.h>
+#include <linux/irqflags.h>
#include <asm/sgidefs.h>
#include <asm/war.h>
diff --git a/include/asm-mips/interrupt.h b/include/asm-mips/irqflags.h
similarity index 80%
rename from include/asm-mips/interrupt.h
rename to include/asm-mips/irqflags.h
index a99d686..43ca09a 100644
--- a/include/asm-mips/interrupt.h
+++ b/include/asm-mips/irqflags.h
@@ -8,13 +8,15 @@
* Copyright (C) 1999 Silicon Graphics
* Copyright (C) 2000 MIPS Technologies, Inc.
*/
-#ifndef _ASM_INTERRUPT_H
-#define _ASM_INTERRUPT_H
+#ifndef _ASM_IRQFLAGS_H
+#define _ASM_IRQFLAGS_H
+
+#ifndef __ASSEMBLY__
#include <asm/hazards.h>
__asm__ (
- " .macro local_irq_enable \n"
+ " .macro raw_local_irq_enable \n"
" .set push \n"
" .set reorder \n"
" .set noat \n"
@@ -35,10 +37,10 @@
" .set pop \n"
" .endm");
-static inline void local_irq_enable(void)
+static inline void raw_local_irq_enable(void)
{
__asm__ __volatile__(
- "local_irq_enable"
+ "raw_local_irq_enable"
: /* no outputs */
: /* no inputs */
: "memory");
@@ -63,7 +65,7 @@
* Workaround: mask EXL bit of the result or place a nop before mfc0.
*/
__asm__ (
- " .macro local_irq_disable\n"
+ " .macro raw_local_irq_disable\n"
" .set push \n"
" .set noat \n"
#ifdef CONFIG_MIPS_MT_SMTC
@@ -84,17 +86,17 @@
" .set pop \n"
" .endm \n");
-static inline void local_irq_disable(void)
+static inline void raw_local_irq_disable(void)
{
__asm__ __volatile__(
- "local_irq_disable"
+ "raw_local_irq_disable"
: /* no outputs */
: /* no inputs */
: "memory");
}
__asm__ (
- " .macro local_save_flags flags \n"
+ " .macro raw_local_save_flags flags \n"
" .set push \n"
" .set reorder \n"
#ifdef CONFIG_MIPS_MT_SMTC
@@ -105,13 +107,13 @@
" .set pop \n"
" .endm \n");
-#define local_save_flags(x) \
+#define raw_local_save_flags(x) \
__asm__ __volatile__( \
- "local_save_flags %0" \
+ "raw_local_save_flags %0" \
: "=r" (x))
__asm__ (
- " .macro local_irq_save result \n"
+ " .macro raw_local_irq_save result \n"
" .set push \n"
" .set reorder \n"
" .set noat \n"
@@ -135,15 +137,15 @@
" .set pop \n"
" .endm \n");
-#define local_irq_save(x) \
+#define raw_local_irq_save(x) \
__asm__ __volatile__( \
- "local_irq_save\t%0" \
+ "raw_local_irq_save\t%0" \
: "=r" (x) \
: /* no inputs */ \
: "memory")
__asm__ (
- " .macro local_irq_restore flags \n"
+ " .macro raw_local_irq_restore flags \n"
" .set push \n"
" .set noreorder \n"
" .set noat \n"
@@ -182,40 +184,42 @@
" .set pop \n"
" .endm \n");
-#define local_irq_restore(flags) \
+#define raw_local_irq_restore(flags) \
do { \
unsigned long __tmp1; \
\
__asm__ __volatile__( \
- "local_irq_restore\t%0" \
+ "raw_local_irq_restore\t%0" \
: "=r" (__tmp1) \
: "0" (flags) \
: "memory"); \
} while(0)
-static inline int irqs_disabled(void)
+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
*/
- 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;
+ return flags & 0x400;
#else
- unsigned long flags;
- local_save_flags(flags);
-
return !(flags & 1);
#endif
}
-#endif /* _ASM_INTERRUPT_H */
+#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 */
diff --git a/include/asm-mips/mipsregs.h b/include/asm-mips/mipsregs.h
index b4169f0..6776688 100644
--- a/include/asm-mips/mipsregs.h
+++ b/include/asm-mips/mipsregs.h
@@ -1417,7 +1417,7 @@
#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
diff --git a/include/asm-mips/system.h b/include/asm-mips/system.h
index 130333d..13c98dd 100644
--- a/include/asm-mips/system.h
+++ b/include/asm-mips/system.h
@@ -13,13 +13,13 @@
#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