nds32: report any one of hit read watchpoints

If multiple read watchpoints are hit at the same time, report
any one of these hit watchpoints.

Change-Id: I8d4439aa80e4b62bb7d48bbdc0450920e2008a2e
Signed-off-by: Hsiangkai Wang <hsiangkai@gmail.com>
Reviewed-on: http://openocd.zylin.com/1576
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>

diff --git a/src/target/nds32_v3_common.c b/src/target/nds32_v3_common.c
index b524679e286e2eae1c4fdc8e90e21cff86360fb6..e88430f2b93e69413ff969af0fbd170379c8933b 100644 (file)
--- a/src/target/nds32_v3_common.c
+++ b/src/target/nds32_v3_common.c
@@ -240,6 +240,7 @@ static int nds32_v3_get_exception_address(struct nds32 *nds32,
        uint32_t match_count;
        int32_t i;
        static int32_t number_of_hard_break;
+       uint32_t bp_control;
 
        if (number_of_hard_break == 0) {
                aice_read_debug_reg(aice, NDS_EDM_SR_EDM_CFG, &edm_cfg);
@@ -255,6 +256,14 @@ static int nds32_v3_get_exception_address(struct nds32 *nds32,
                if (match_bits & (1 << i)) {
                        aice_read_debug_reg(aice, NDS_EDM_SR_BPA0 + i, address);
                        match_count++;
+
+                       /* If target hits multiple read/access watchpoint,
+                        * select the first one. */
+                       aice_read_debug_reg(aice, NDS_EDM_SR_BPC0 + i, &bp_control);
+                       if (0x3 == (bp_control & 0x3)) {
+                               match_count = 1;
+                               break;
+                       }
                }
        }