[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 809fd1b55..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)