From 4db5299b5bd2c3e853f7383c076f9726dc588680 Mon Sep 17 00:00:00 2001 From: Tomas Vanek Date: Thu, 24 Jan 2019 13:36:39 +0100 Subject: [PATCH 1/1] target/cortex_m: remove fp_code_available counting MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit fp_code_available looses sync with the real number of free comparators as soon as cortex_m_set_breakpoint() returns an error. Remove the counter and always go through the fp_comparator_list to find a free one. Change-Id: I9f6e06c36d8a57ad11df5155e8a1a3aff6d833a5 Signed-off-by: Tomas Vanek Reviewed-on: http://openocd.zylin.com/4870 Tested-by: jenkins Reviewed-by: Jānis Skujenieks Reviewed-by: Christopher Head Reviewed-by: Matthias Welwarsky --- src/target/cortex_m.c | 18 +----------------- src/target/cortex_m.h | 1 - 2 files changed, 1 insertion(+), 18 deletions(-) diff --git a/src/target/cortex_m.c b/src/target/cortex_m.c index 8223de77f6..8c43016cbf 100644 --- a/src/target/cortex_m.c +++ b/src/target/cortex_m.c @@ -1164,7 +1164,7 @@ int cortex_m_set_breakpoint(struct target *target, struct breakpoint *breakpoint fp_num++; if (fp_num >= cortex_m->fp_num_code) { LOG_ERROR("Can not find free FPB Comparator!"); - return ERROR_FAIL; + return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; } breakpoint->set = fp_num + 1; fpcr_value = breakpoint->address | 1; @@ -1273,13 +1273,6 @@ int cortex_m_unset_breakpoint(struct target *target, struct breakpoint *breakpoi int cortex_m_add_breakpoint(struct target *target, struct breakpoint *breakpoint) { - struct cortex_m_common *cortex_m = target_to_cm(target); - - if ((breakpoint->type == BKPT_HARD) && (cortex_m->fp_code_available < 1)) { - LOG_INFO("no flash patch comparator unit available for hardware breakpoint"); - return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; - } - if (breakpoint->length == 3) { LOG_DEBUG("Using a two byte breakpoint for 32bit Thumb-2 request"); breakpoint->length = 2; @@ -1290,16 +1283,11 @@ int cortex_m_add_breakpoint(struct target *target, struct breakpoint *breakpoint return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; } - if (breakpoint->type == BKPT_HARD) - cortex_m->fp_code_available--; - return cortex_m_set_breakpoint(target, breakpoint); } int cortex_m_remove_breakpoint(struct target *target, struct breakpoint *breakpoint) { - struct cortex_m_common *cortex_m = target_to_cm(target); - /* REVISIT why check? FPB can be updated with core running ... */ if (target->state != TARGET_HALTED) { LOG_WARNING("target not halted"); @@ -1309,9 +1297,6 @@ int cortex_m_remove_breakpoint(struct target *target, struct breakpoint *breakpo if (breakpoint->set) cortex_m_unset_breakpoint(target, breakpoint); - if (breakpoint->type == BKPT_HARD) - cortex_m->fp_code_available++; - return ERROR_OK; } @@ -2121,7 +2106,6 @@ int cortex_m_examine(struct target *target) /* bits [14:12] and [7:4] */ cortex_m->fp_num_code = ((fpcr >> 8) & 0x70) | ((fpcr >> 4) & 0xF); cortex_m->fp_num_lit = (fpcr >> 8) & 0xF; - cortex_m->fp_code_available = cortex_m->fp_num_code; /* Detect flash patch revision, see RM DDI 0403E.b page C1-817. Revision is zero base, fp_rev == 1 means Rev.2 ! */ cortex_m->fp_rev = (fpcr >> 28) & 0xf; diff --git a/src/target/cortex_m.h b/src/target/cortex_m.h index b375d1111d..4b207467ea 100644 --- a/src/target/cortex_m.h +++ b/src/target/cortex_m.h @@ -172,7 +172,6 @@ struct cortex_m_common { /* Flash Patch and Breakpoint (FPB) */ int fp_num_lit; int fp_num_code; - int fp_code_available; int fp_rev; bool fpb_enabled; struct cortex_m_fp_comparator *fp_comparator_list; -- 2.30.2