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authorMike Frysinger <vapier.adi@gmail.com>2008-02-02 08:47:24 +0100
committerBryan Wu <bryan.wu@analog.com>2008-02-02 08:47:24 +0100
commit80f31c8a03d2f0644d0ceaf14e7e0108a007c962 (patch)
tree71af89f61a1e9f969b9d24977e97ed5982f98237 /include/asm-blackfin/trace.h
parent[Blackfin] arch: fix typo in printk message (diff)
downloadlinux-80f31c8a03d2f0644d0ceaf14e7e0108a007c962.tar.xz
linux-80f31c8a03d2f0644d0ceaf14e7e0108a007c962.zip
[Blackfin] arch: change the trace buffer control start/stop logic in the exception handlers
To save/restore the trace buffer control so that if we take an exception after turning off the trace buffer at a higher level we dont inadvertently turn the trace buffer back on Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Diffstat (limited to 'include/asm-blackfin/trace.h')
-rw-r--r--include/asm-blackfin/trace.h35
1 files changed, 20 insertions, 15 deletions
diff --git a/include/asm-blackfin/trace.h b/include/asm-blackfin/trace.h
index 6313aace9d59..ef18afbc2101 100644
--- a/include/asm-blackfin/trace.h
+++ b/include/asm-blackfin/trace.h
@@ -46,42 +46,47 @@ extern unsigned long software_trace_buff[];
#ifdef CONFIG_DEBUG_BFIN_HWTRACE_ON
-#define TRACE_BUFFER_START(preg, dreg) trace_buffer_start(preg, dreg)
-#define TRACE_BUFFER_STOP(preg, dreg) trace_buffer_stop(preg, dreg)
-
#define trace_buffer_stop(preg, dreg) \
preg.L = LO(TBUFCTL); \
preg.H = HI(TBUFCTL); \
dreg = 0x1; \
[preg] = dreg;
-#define trace_buffer_start(preg, dreg) \
- preg.L = LO(TBUFCTL); \
- preg.H = HI(TBUFCTL); \
- dreg = BFIN_TRACE_ON; \
- [preg] = dreg;
-
#define trace_buffer_init(preg, dreg) \
preg.L = LO(TBUFCTL); \
preg.H = HI(TBUFCTL); \
dreg = BFIN_TRACE_INIT; \
[preg] = dreg;
+#define trace_buffer_save(preg, dreg) \
+ preg.L = LO(TBUFCTL); \
+ preg.H = HI(TBUFCTL); \
+ dreg = [preg]; \
+ [sp++] = dreg; \
+ dreg = 0x1; \
+ [preg] = dreg;
+
+#define trace_buffer_restore(preg, dreg) \
+ preg.L = LO(TBUFCTL); \
+ preg.H = HI(TBUFCTL); \
+ dreg = [sp--]; \
+ [preg] = dreg;
+
#else /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
#define trace_buffer_stop(preg, dreg)
-#define trace_buffer_start(preg, dreg)
#define trace_buffer_init(preg, dreg)
+#define trace_buffer_save(preg, dreg)
+#define trace_buffer_restore(preg, dreg)
#endif /* CONFIG_DEBUG_BFIN_HWTRACE_ON */
#ifdef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE
-# define DEBUG_START_HWTRACE(preg, dreg) trace_buffer_start(preg, dreg)
-# define DEBUG_STOP_HWTRACE(preg, dreg) trace_buffer_stop(preg, dreg)
-
+# define DEBUG_HWTRACE_SAVE(preg, dreg) trace_buffer_save(preg, dreg)
+# define DEBUG_HWTRACE_RESTORE(preg, dreg) trace_buffer_restore(preg, dreg)
#else
-# define DEBUG_START_HWTRACE(preg, dreg)
-# define DEBUG_STOP_HWTRACE(preg, dreg)
+# define DEBUG_HWTRACE_SAVE(preg, dreg)
+# define DEBUG_HWTRACE_RESTORE(preg, dreg)
#endif
#endif /* __ASSEMBLY__ */