Added mips_ejtag_drscan_32_out() for optimization.

4 files changed, 22 insertions, 6 deletions

diff --git a/src/target/mips32_pracc.c b/src/target/mips32_pracc.c
index ef132fe3..178f68e1 100644
--- a/src/target/mips32_pracc.c
+++ b/src/target/mips32_pracc.c
@@ -188,12 +188,12 @@ static int mips32_pracc_exec_read(struct mips32_pracc_context *ctx, uint32_t add
 
 	/* Send the data out */
 	mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_DATA);
-	mips_ejtag_drscan_32(ctx->ejtag_info, &data);
+	mips_ejtag_drscan_32_out(ctx->ejtag_info, data);
 
 	/* Clear the access pending bit (let the processor eat!) */
 	ejtag_ctrl = ejtag_info->ejtag_ctrl & ~EJTAG_CTRL_PRACC;
 	mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_CONTROL);
-	mips_ejtag_drscan_32(ctx->ejtag_info, &ejtag_ctrl);
+	mips_ejtag_drscan_32_out(ctx->ejtag_info, ejtag_ctrl);
 
 	return jtag_execute_queue();
 }
@@ -213,7 +213,7 @@ static int mips32_pracc_exec_write(struct mips32_pracc_context *ctx, uint32_t ad
 	/* Clear access pending bit */
 	ejtag_ctrl = ejtag_info->ejtag_ctrl & ~EJTAG_CTRL_PRACC;
 	mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_CONTROL);
-	mips_ejtag_drscan_32(ctx->ejtag_info, &ejtag_ctrl);
+	mips_ejtag_drscan_32_out(ctx->ejtag_info, ejtag_ctrl);
 
 	retval = jtag_execute_queue();
 	if (retval != ERROR_OK)
@@ -1026,12 +1026,12 @@ int mips32_pracc_fastdata_xfer(struct mips_ejtag *ejtag_info, struct working_are
 			return retval;
 
 		mips_ejtag_set_instr(ejtag_info, EJTAG_INST_DATA);
-		mips_ejtag_drscan_32(ejtag_info, &jmp_code[i]);
+		mips_ejtag_drscan_32_out(ejtag_info, jmp_code[i]);
 
 		/* Clear the access pending bit (let the processor eat!) */
 		ejtag_ctrl = ejtag_info->ejtag_ctrl & ~EJTAG_CTRL_PRACC;
 		mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL);
-		mips_ejtag_drscan_32(ejtag_info, &ejtag_ctrl);
+		mips_ejtag_drscan_32_out(ejtag_info, ejtag_ctrl);
 	}
 
 	if ((retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl)) != ERROR_OK)
diff --git a/src/target/mips_ejtag.c b/src/target/mips_ejtag.c
index 087be076..6229055d 100644
--- a/src/target/mips_ejtag.c
+++ b/src/target/mips_ejtag.c
@@ -121,6 +121,21 @@ int mips_ejtag_drscan_32(struct mips_ejtag *ejtag_info, uint32_t *data)
 	return ERROR_OK;
 }
 
+void mips_ejtag_drscan_32_out(struct mips_ejtag *ejtag_info, uint32_t data)
+{
+	struct jtag_tap *tap;
+	tap  = ejtag_info->tap;
+	assert(tap != NULL);
+
+	struct scan_field field;
+
+	field.num_bits = 32;
+	field.out_value = (uint8_t *)&data;
+	field.in_value = NULL;
+
+	jtag_add_dr_scan(tap, 1, &field, TAP_IDLE);
+}
+
 int mips_ejtag_drscan_8(struct mips_ejtag *ejtag_info, uint32_t *data)
 {
 	struct jtag_tap *tap;
diff --git a/src/target/mips_ejtag.h b/src/target/mips_ejtag.h
index aa890d2b..a6ed95a5 100644
--- a/src/target/mips_ejtag.h
+++ b/src/target/mips_ejtag.h
@@ -136,6 +136,7 @@ void mips_ejtag_set_instr(struct mips_ejtag *ejtag_info,
 int mips_ejtag_enter_debug(struct mips_ejtag *ejtag_info);
 int mips_ejtag_exit_debug(struct mips_ejtag *ejtag_info);
 int mips_ejtag_get_idcode(struct mips_ejtag *ejtag_info, uint32_t *idcode);
+void mips_ejtag_drscan_32_out(struct mips_ejtag *ejtag_info, uint32_t data);
 int mips_ejtag_drscan_32(struct mips_ejtag *ejtag_info, uint32_t *data);
 void mips_ejtag_drscan_8_out(struct mips_ejtag *ejtag_info, uint8_t data);
 int mips_ejtag_drscan_8(struct mips_ejtag *ejtag_info, uint32_t *data);
diff --git a/src/target/mips_m4k.c b/src/target/mips_m4k.c
index 74d0d503..1166b874 100644
--- a/src/target/mips_m4k.c
+++ b/src/target/mips_m4k.c
@@ -274,7 +274,7 @@ static int mips_m4k_assert_reset(struct target *target)
 			uint32_t ejtag_ctrl = ejtag_info->ejtag_ctrl | EJTAG_CTRL_PRRST | EJTAG_CTRL_PERRST;
 			LOG_DEBUG("Using EJTAG reset (PRRST) to reset processor...");
 			mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL);
-			mips_ejtag_drscan_32(ejtag_info, &ejtag_ctrl);
+			mips_ejtag_drscan_32_out(ejtag_info, ejtag_ctrl);
 		}
 	}