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authorRobin Getz <robin.getz@analog.com>2007-06-21 16:34:08 +0800
committerBryan Wu <bryan.wu@analog.com>2007-06-21 16:34:08 +0800
commit669b792c77bbc30e9f4d9c95dbc918dc348c49c2 (patch)
tree2d8403e9e3cf998eda8465a322261d45e24cd26a /arch/blackfin/mach-common
parent29440a2b4cd37e32dfe0fa60ef1665775b24dab1 (diff)
Blackfin arch: Clean up trace buffer handling, No major functional changes.
Turns on trace earlier, so crashes at kernel start should print out a trace, making things easier to debug. Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <michael.frysinger@analog.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Diffstat (limited to 'arch/blackfin/mach-common')
-rw-r--r--arch/blackfin/mach-common/entry.S33
-rw-r--r--arch/blackfin/mach-common/interrupt.S8
2 files changed, 11 insertions, 30 deletions
diff --git a/arch/blackfin/mach-common/entry.S b/arch/blackfin/mach-common/entry.S
index c4a32ea06c4..15603275f74 100644
--- a/arch/blackfin/mach-common/entry.S
+++ b/arch/blackfin/mach-common/entry.S
@@ -54,29 +54,10 @@
#include <asm/errno.h>
#include <asm/thread_info.h> /* TIF_NEED_RESCHED */
#include <asm/asm-offsets.h>
+#include <asm/trace.h>
#include <asm/mach-common/context.S>
-#ifdef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE
- /*
- * TODO: this should be proper save/restore, but for now
- * we'll just cheat and use 0x1/0x13
- */
-# define DEBUG_START_HWTRACE \
- P5.l = LO(TBUFCTL); \
- P5.h = HI(TBUFCTL); \
- R7 = 0x13; \
- [P5] = R7;
-# define DEBUG_STOP_HWTRACE \
- P5.l = LO(TBUFCTL); \
- P5.h = HI(TBUFCTL); \
- R7 = 0x01; \
- [P5] = R7;
-#else
-# define DEBUG_START_HWTRACE
-# define DEBUG_STOP_HWTRACE
-#endif
-
#ifdef CONFIG_EXCPT_IRQ_SYSC_L1
.section .l1.text
#else
@@ -110,7 +91,7 @@ ENTRY(_ex_icplb)
ASTAT = [sp++];
SAVE_ALL_SYS
call __cplb_hdr;
- DEBUG_START_HWTRACE
+ DEBUG_START_HWTRACE(p5, r7)
RESTORE_ALL_SYS
SP = RETN;
rtx;
@@ -128,7 +109,7 @@ ENTRY(_ex_spinlock)
ENDPROC(_ex_spinlock)
ENTRY(_ex_syscall)
- DEBUG_START_HWTRACE
+ DEBUG_START_HWTRACE(p5, r7)
(R7:6,P5:4) = [sp++];
ASTAT = [sp++];
raise 15; /* invoked by TRAP #0, for sys call */
@@ -186,7 +167,7 @@ ENTRY(_ex_single_step)
if !cc jump _ex_trap_c;
_return_from_exception:
- DEBUG_START_HWTRACE
+ DEBUG_START_HWTRACE(p5, r7)
#ifdef ANOMALY_05000257
R7=LC0;
LC0=R7;
@@ -208,7 +189,7 @@ ENTRY(_handle_bad_cplb)
* need to make a CPLB exception look like a normal exception
*/
- DEBUG_START_HWTRACE
+ DEBUG_START_HWTRACE(p5, r7)
RESTORE_ALL_SYS
[--sp] = ASTAT;
[--sp] = (R7:6, P5:4);
@@ -251,7 +232,7 @@ ENTRY(_ex_trap_c)
R6 = SEQSTAT;
[P5] = R6;
- DEBUG_START_HWTRACE
+ DEBUG_START_HWTRACE(p5, r7)
(R7:6,P5:4) = [sp++];
ASTAT = [sp++];
SP = RETN;
@@ -335,7 +316,7 @@ ENTRY(_trap) /* Exception: 4th entry into system event table(supervisor mode)*/
/* Try to deal with syscalls quickly. */
[--sp] = ASTAT;
[--sp] = (R7:6, P5:4);
- DEBUG_STOP_HWTRACE
+ DEBUG_STOP_HWTRACE(p5, r7)
r7 = SEQSTAT; /* reason code is in bit 5:0 */
r6.l = lo(SEQSTAT_EXCAUSE);
r6.h = hi(SEQSTAT_EXCAUSE);
diff --git a/arch/blackfin/mach-common/interrupt.S b/arch/blackfin/mach-common/interrupt.S
index 8be548e061b..203e2070916 100644
--- a/arch/blackfin/mach-common/interrupt.S
+++ b/arch/blackfin/mach-common/interrupt.S
@@ -34,6 +34,7 @@
#include <linux/linkage.h>
#include <asm/entry.h>
#include <asm/asm-offsets.h>
+#include <asm/trace.h>
#include <asm/mach-common/context.S>
@@ -170,10 +171,9 @@ ENTRY(_evt_ivhw)
r7.l = W[p5];
1:
#endif
- p0.l = lo(TBUFCTL);
- p0.h = hi(TBUFCTL);
- r0 = 1;
- [p0] = r0;
+
+ trace_buffer_stop(p0, r0);
+
r0 = IRQ_HWERR;
r1 = sp;