>From 8296dac1d74c65a40ae0cf24d1ee3352c58d3a7f Mon Sep 17 00:00:00 2001 From: John McCarthy Date: Sun, 5 Oct 2008 21:33:12 -0400 Subject: [PATCH] Add target variant ejtag_reset to use PrRst EJTAG control bit to reset processor. Signed-off-by: John McCarthy --- src/target/mips_m4k.c | 23 +++++++++++++++-------- 1 files changed, 15 insertions(+), 8 deletions(-) diff --git src/target/mips_m4k.c src/target/mips_m4k.c index 3508ebd..fc4c27e 100644 --- src/target/mips_m4k.c +++ src/target/mips_m4k.c @@ -255,14 +255,21 @@ int mips_m4k_assert_reset(target_t *target) mips_ejtag_set_instr(ejtag_info, EJTAG_INST_NORMALBOOT, NULL); } - /* here we should issue a srst only, but we may have to assert trst as well */ - if (jtag_reset_config & RESET_SRST_PULLS_TRST) - { - jtag_add_reset(1, 1); - } - else - { - jtag_add_reset(0, 1); + if (strcmp(target->variant, "ejtag_srst") == 0) { + u32 ejtag_ctrl = ejtag_info->ejtag_ctrl | EJTAG_CTRL_PRRST; + LOG_DEBUG("Using EJTAG reset (PRRST) to reset processor..."); + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL, NULL); + mips_ejtag_drscan_32(ejtag_info, &ejtag_ctrl); + } else { + /* here we should issue a srst only, but we may have to assert trst as well */ + if (jtag_reset_config & RESET_SRST_PULLS_TRST) + { + jtag_add_reset(1, 1); + } + else + { + jtag_add_reset(0, 1); + } } target->state = TARGET_RESET; -- 1.5.4.3