diff options
Diffstat (limited to 'src/target/arm_adi_v5.c')
| -rw-r--r-- | src/target/arm_adi_v5.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/target/arm_adi_v5.c b/src/target/arm_adi_v5.c index 96accf3e..e490f2e5 100644 --- a/src/target/arm_adi_v5.c +++ b/src/target/arm_adi_v5.c @@ -101,6 +101,10 @@ static int adi_jtag_dp_scan(struct swjdp_common *swjdp, arm_jtag_set_instr(jtag_info, instr, NULL); /* Add specified number of tck clocks before accessing memory bus */ + + /* REVISIT these TCK cycles should be *AFTER* updating APACC, since + * they provide more time for the (MEM) AP to complete the read ... + */ if ((instr == JTAG_DP_APACC) && ((reg_addr == AP_REG_DRW) || ((reg_addr & 0xF0) == AP_REG_BD0)) @@ -137,6 +141,10 @@ static int adi_jtag_dp_scan_u32(struct swjdp_common *swjdp, arm_jtag_set_instr(jtag_info, instr, NULL); /* Add specified number of tck clocks before accessing memory bus */ + + /* REVISIT these TCK cycles should be *AFTER* updating APACC, since + * they provide more time for the (MEM) AP to complete the read ... + */ if ((instr == JTAG_DP_APACC) && ((reg_addr == AP_REG_DRW) || ((reg_addr & 0xF0) == AP_REG_BD0)) |