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David Brownell <david-b@pacbell.net>

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Optionally shave time off the armv4_5 run_algorithm() code:  let
them terminate using software breakpoints, avoiding roundtrips
to manage hardware ones.

Enable this by using BKPT to terminate execution instead of "branch
to here" loops.  Then pass zero as the exit address, except when
running on an ARMv4 core.  ARM7TDMI, ARM9TDMI, and derived cores
now set a flag saying they're ARMv4.

Use that mechanism in arm_nandwrite(), for about 3% speedup on a
DaVinci ARM926 core; not huge, but it helps.  Some other algorithms
could use this too (mostly flavors of flash operation).

git-svn-id: svn://svn.berlios.de/openocd/trunk@2680 b42882b7-edfa-0310-969c-e2dbd0fdcd60
This commit is contained in:
oharboe
2009-09-09 06:28:49 +00:00
parent 8b2b0071a9
commit aa46b15377
5 changed files with 27 additions and 8 deletions
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1
src/target/armv4_5.h
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@@ -76,6 +76,7 @@ typedef struct armv4_5_common_s
reg_cache_t *core_cache;
enum armv4_5_mode core_mode;
enum armv4_5_state core_state;
bool is_armv4;
int (*full_context)(struct target_s *target);
int (*read_core_reg)(struct target_s *target, int num, enum armv4_5_mode mode);
int (*write_core_reg)(struct target_s *target, int num, enum armv4_5_mode mode, uint32_t value);