diff options
| author | Robin Getz <robin.getz@analog.com> | 2007-06-21 16:34:08 +0800 |
|---|---|---|
| committer | Bryan Wu <bryan.wu@analog.com> | 2007-06-21 16:34:08 +0800 |
| commit | 669b792c77bbc30e9f4d9c95dbc918dc348c49c2 (patch) | |
| tree | 2d8403e9e3cf998eda8465a322261d45e24cd26a /arch/blackfin/mach-common/entry.S | |
| parent | 29440a2b4cd37e32dfe0fa60ef1665775b24dab1 (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/entry.S')
| -rw-r--r-- | arch/blackfin/mach-common/entry.S | 33 |
1 files changed, 7 insertions, 26 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); |