hwtracebuffer.patch

   1 Index: arch/blackfin/mach-common/entry.S
   2 ===================================================================
   3 RCS file: /usr/local/src/blackfin/rsync/uclinux533/uClinux-dist/linux-2.6.x/arch/blackfin/mach-common/entry.S,v
   4 retrieving revision 1.43
   5 diff -u -p -r1.43 entry.S
   6 --- arch/blackfin/mach-common/entry.S   31 Aug 2006 06:22:41 -0000      1.43
   7 +++ arch/blackfin/mach-common/entry.S   2 Sep 2006 01:22:06 -0000
   8 @@ -57,6 +57,29 @@
   9  #include <asm/thread_info.h>  /* TIF_NEED_RESCHED */
  10  #include <asm/asm-offsets.h>
  11
  12 +#ifdef CONFIG_DEBUG_BFIN_NO_KERN_HWTRACE
  13 +       /*
  14 +        * TODO: this should be proper save/restore, but for now
  15 +        * we'll just cheat and use 0x1/0x13
  16 +        */
  17 +# define DEBUG_START_HWTRACE \
  18 +       P0.l = LO(TBUFCTL); \
  19 +       P0.h = HI(TBUFCTL); \
  20 +       R0 = [SP++]; \
  21 +       [P0] = R0;
  22 +# define DEBUG_STOP_HWTRACE \
  23 +       P0.l = LO(TBUFCTL); \
  24 +       P0.h = HI(TBUFCTL); \
  25 +       R0 = [P0]; \
  26 +       R1 = ~TBUFEN; \
  27 +       [SP--] = R0; \
  28 +       R2 = R0 & R1; \
  29 +       [P0] = R2;
  30 +#else
  31 +# define DEBUG_START_HWTRACE
  32 +# define DEBUG_STOP_HWTRACE
  33 +#endif
  34 +
  35  .data
  36  ALIGN
  37  _extable:
  38 @@ -149,7 +172,9 @@ ENTRY(_ex_icplb)
  39         (R7:6,P5:4) = [sp++];
  40         ASTAT = [sp++];
  41         SAVE_ALL_SYS
  42 +       DEBUG_STOP_HWTRACE
  43         call __cplb_hdr;
  44 +       DEBUG_START_HWTRACE
  45         RESTORE_ALL_SYS
  46         SP = RETN;
  47         rtx;