X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Ftarget%2Fmips_ejtag.c;h=449b6b828ede2b3e524a521f52da1b425608f726;hp=6f06d9a3afc79b2b0964e797459307ac3035d158;hb=3a550e5b5fe011e526b150a5d234b48e8e2aaad6;hpb=a8141cafdef162d52e128cd2ab51702b9800fda2

diff --git a/src/target/mips_ejtag.c b/src/target/mips_ejtag.c
index 6f06d9a3af..449b6b828e 100644
--- a/src/target/mips_ejtag.c
+++ b/src/target/mips_ejtag.c
@@ -4,6 +4,8 @@
  *                                                                         *
  *   Copyright (C) 2008 by David T.L. Wong                                 *
  *                                                                         *
+ *   Copyright (C) 2009 by David N. Claffey <dnclaffey@gmail.com>          *
+ *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 2 of the License, or     *
@@ -26,75 +28,74 @@
 #include "mips32.h"
 #include "mips_ejtag.h"
 
-
-int mips_ejtag_set_instr(struct mips_ejtag *ejtag_info, int new_instr, void *delete_me_and_submit_patch)
+void mips_ejtag_set_instr(struct mips_ejtag *ejtag_info, int new_instr)
 {
 	struct jtag_tap *tap;
 
 	tap = ejtag_info->tap;
-	if (tap == NULL)
-		return ERROR_FAIL;
+	assert(tap != NULL);
 
 	if (buf_get_u32(tap->cur_instr, 0, tap->ir_length) != (uint32_t)new_instr)
 	{
 		struct scan_field field;
 		uint8_t t[4];
 
-		field.tap = tap;
 		field.num_bits = tap->ir_length;
 		field.out_value = t;
-		buf_set_u32(field.out_value, 0, field.num_bits, new_instr);
+		buf_set_u32(t, 0, field.num_bits, new_instr);
 		field.in_value = NULL;
 
-		jtag_add_ir_scan(1, &field, jtag_get_end_state());
+		jtag_add_ir_scan(tap, &field, TAP_IDLE);
 	}
-
-	return ERROR_OK;
 }
 
 int mips_ejtag_get_idcode(struct mips_ejtag *ejtag_info, uint32_t *idcode)
 {
 	struct scan_field field;
+	uint8_t r[4];
 
-	jtag_set_end_state(TAP_IDLE);
-
-	mips_ejtag_set_instr(ejtag_info, EJTAG_INST_IDCODE, NULL);
+	mips_ejtag_set_instr(ejtag_info, EJTAG_INST_IDCODE);
 
-	field.tap = ejtag_info->tap;
 	field.num_bits = 32;
 	field.out_value = NULL;
-	field.in_value = (void*)idcode;
+	field.in_value = r;
 
-	jtag_add_dr_scan(1, &field, jtag_get_end_state());
+	jtag_add_dr_scan(ejtag_info->tap, 1, &field, TAP_IDLE);
 
-	if (jtag_execute_queue() != ERROR_OK)
+	int retval;
+	if ((retval = jtag_execute_queue()) != ERROR_OK)
 	{
 		LOG_ERROR("register read failed");
+		return retval;
 	}
 
+	*idcode = buf_get_u32(field.in_value, 0, 32);
+
 	return ERROR_OK;
 }
 
-int mips_ejtag_get_impcode(struct mips_ejtag *ejtag_info, uint32_t *impcode)
+static int mips_ejtag_get_impcode(struct mips_ejtag *ejtag_info, uint32_t *impcode)
 {
 	struct scan_field field;
+	uint8_t r[4];
 
-	jtag_set_end_state(TAP_IDLE);
-
-	mips_ejtag_set_instr(ejtag_info, EJTAG_INST_IMPCODE, NULL);
+	mips_ejtag_set_instr(ejtag_info, EJTAG_INST_IMPCODE);
 
-	field.tap = ejtag_info->tap;
 	field.num_bits = 32;
 	field.out_value = NULL;
-	field.in_value = (void*)impcode;
+	field.in_value = r;
 
-	jtag_add_dr_scan(1, &field, jtag_get_end_state());
+	jtag_add_dr_scan(ejtag_info->tap, 1, &field, TAP_IDLE);
 
-	if (jtag_execute_queue() != ERROR_OK)
+	int retval;
+	if ((retval = jtag_execute_queue()) != ERROR_OK)
 	{
 		LOG_ERROR("register read failed");
+		return retval;
 	}
 
+	*impcode = buf_get_u32(field.in_value, 0, 32);
+
 	return ERROR_OK;
 }
 
@@ -102,20 +103,18 @@ int mips_ejtag_drscan_32(struct mips_ejtag *ejtag_info, uint32_t *data)
 {
 	struct jtag_tap *tap;
 	tap  = ejtag_info->tap;
+	assert(tap != NULL);
 
-	if (tap == NULL)
-		return ERROR_FAIL;
 	struct scan_field field;
 	uint8_t t[4], r[4];
 	int retval;
 
-	field.tap = tap;
 	field.num_bits = 32;
 	field.out_value = t;
-	buf_set_u32(field.out_value, 0, field.num_bits, *data);
+	buf_set_u32(t, 0, field.num_bits, *data);
 	field.in_value = r;
 
-	jtag_add_dr_scan(1, &field, jtag_get_end_state());
+	jtag_add_dr_scan(tap, 1, &field, TAP_IDLE);
 
 	if ((retval = jtag_execute_queue()) != ERROR_OK)
 	{
@@ -130,49 +129,103 @@ int mips_ejtag_drscan_32(struct mips_ejtag *ejtag_info, uint32_t *data)
 	return ERROR_OK;
 }
 
-int mips_ejtag_step_enable(struct mips_ejtag *ejtag_info)
+void mips_ejtag_drscan_32_out(struct mips_ejtag *ejtag_info, uint32_t data)
+{
+	uint8_t t[4];
+	struct jtag_tap *tap;
+	tap  = ejtag_info->tap;
+	assert(tap != NULL);
+
+	struct scan_field field;
+
+	field.num_bits = 32;
+	field.out_value = t;
+	buf_set_u32(t, 0, field.num_bits, 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;
+	tap  = ejtag_info->tap;
+	assert(tap != NULL);
+
+	struct scan_field field;
+	uint8_t t[4] = {0, 0, 0, 0}, r[4];
+	int retval;
+
+	field.num_bits = 8;
+	field.out_value = t;
+	buf_set_u32(t, 0, field.num_bits, *data);
+	field.in_value = r;
+
+	jtag_add_dr_scan(tap, 1, &field, TAP_IDLE);
+
+	if ((retval = jtag_execute_queue()) != ERROR_OK)
+	{
+		LOG_ERROR("register read failed");
+		return retval;
+	}
+
+	*data = buf_get_u32(field.in_value, 0, 32);
+
+	return ERROR_OK;
+}
+
+void mips_ejtag_drscan_8_out(struct mips_ejtag *ejtag_info, uint8_t data)
+{
+	struct jtag_tap *tap;
+	tap  = ejtag_info->tap;
+	assert(tap != NULL);
+
+	struct scan_field field;
+
+	field.num_bits = 8;
+	field.out_value = &data;
+	field.in_value = NULL;
+
+	jtag_add_dr_scan(tap, 1, &field, TAP_IDLE);
+}
+
+static int mips_ejtag_step_enable(struct mips_ejtag *ejtag_info)
 {
-	uint32_t code[] = {
+	static const uint32_t code[] = {
 			MIPS32_MTC0(1,31,0),			/* move $1 to COP0 DeSave */
 			MIPS32_MFC0(1,23,0),			/* move COP0 Debug to $1 */
 			MIPS32_ORI(1,1,0x0100),			/* set SSt bit in debug reg */
 			MIPS32_MTC0(1,23,0),			/* move $1 to COP0 Debug */
+			MIPS32_B(NEG16(5)),
 			MIPS32_MFC0(1,31,0),			/* move COP0 DeSave to $1 */
-			MIPS32_NOP,
-			MIPS32_B(NEG16(7)),
-			MIPS32_NOP,
 	};
 
-	mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
-		0, NULL, 0, NULL, 1);
-
-	return ERROR_OK;
+	return mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code,
+			0, NULL, 0, NULL, 1);
 }
-int mips_ejtag_step_disable(struct mips_ejtag *ejtag_info)
+
+static int mips_ejtag_step_disable(struct mips_ejtag *ejtag_info)
 {
-	uint32_t code[] = {
+	static const uint32_t code[] = {
 			MIPS32_MTC0(15,31,0),							/* move $15 to COP0 DeSave */
-			MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), 	/* $15 = MIPS32_PRACC_STACK */
+			MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)),		/* $15 = MIPS32_PRACC_STACK */
 			MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
-			MIPS32_SW(1,0,15), 								/* sw $1,($15) */
-			MIPS32_SW(2,0,15), 								/* sw $2,($15) */
+			MIPS32_SW(1,0,15),								/* sw $1,($15) */
+			MIPS32_SW(2,0,15),								/* sw $2,($15) */
 			MIPS32_MFC0(1,23,0),							/* move COP0 Debug to $1 */
-			MIPS32_LUI(2,0xFFFF), 							/* $2 = 0xfffffeff */
+			MIPS32_LUI(2,0xFFFF),							/* $2 = 0xfffffeff */
 			MIPS32_ORI(2,2,0xFEFF),
 			MIPS32_AND(1,1,2),
 			MIPS32_MTC0(1,23,0),							/* move $1 to COP0 Debug */
 			MIPS32_LW(2,0,15),
 			MIPS32_LW(1,0,15),
+			MIPS32_B(NEG16(13)),
 			MIPS32_MFC0(15,31,0),							/* move COP0 DeSave to $15 */
-			MIPS32_NOP,
-			MIPS32_B(NEG16(15)),
-			MIPS32_NOP,
 	};
 
-	mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
+	return mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code,
 		0, NULL, 0, NULL, 1);
-
-	return ERROR_OK;
 }
 
 int mips_ejtag_config_step(struct mips_ejtag *ejtag_info, int enable_step)
@@ -185,8 +238,7 @@ int mips_ejtag_config_step(struct mips_ejtag *ejtag_info, int enable_step)
 int mips_ejtag_enter_debug(struct mips_ejtag *ejtag_info)
 {
 	uint32_t ejtag_ctrl;
-	jtag_set_end_state(TAP_IDLE);
-	mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL, NULL);
+	mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL);
 
 	/* set debug break bit */
 	ejtag_ctrl = ejtag_info->ejtag_ctrl | EJTAG_CTRL_JTAGBRK;
@@ -197,7 +249,10 @@ int mips_ejtag_enter_debug(struct mips_ejtag *ejtag_info)
 	mips_ejtag_drscan_32(ejtag_info, &ejtag_ctrl);
 	LOG_DEBUG("ejtag_ctrl: 0x%8.8" PRIx32 "", ejtag_ctrl);
 	if ((ejtag_ctrl & EJTAG_CTRL_BRKST) == 0)
-		LOG_DEBUG("Failed to enter Debug Mode!");
+	{
+		LOG_ERROR("Failed to enter Debug Mode!");
+		return ERROR_FAIL;
+	}
 
 	return ERROR_OK;
 }
@@ -208,43 +263,40 @@ int mips_ejtag_exit_debug(struct mips_ejtag *ejtag_info)
 	inst = MIPS32_DRET;
 
 	/* execute our dret instruction */
-	mips32_pracc_exec(ejtag_info, 1, &inst, 0, NULL, 0, NULL, 0);
-
-	return ERROR_OK;
+	return mips32_pracc_exec(ejtag_info, 1, &inst, 0, NULL, 0, NULL, 0);
 }
 
 int mips_ejtag_read_debug(struct mips_ejtag *ejtag_info, uint32_t* debug_reg)
 {
 	/* read ejtag ECR */
-	uint32_t code[] = {
+	static const uint32_t code[] = {
 			MIPS32_MTC0(15,31,0),							/* move $15 to COP0 DeSave */
-			MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), 	/* $15 = MIPS32_PRACC_STACK */
+			MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)),		/* $15 = MIPS32_PRACC_STACK */
 			MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
-			MIPS32_SW(1,0,15), 								/* sw $1,($15) */
-			MIPS32_SW(2,0,15), 								/* sw $2,($15) */
-			MIPS32_LUI(1,UPPER16(MIPS32_PRACC_PARAM_OUT)), 	/* $1 = MIPS32_PRACC_PARAM_OUT */
+			MIPS32_SW(1,0,15),								/* sw $1,($15) */
+			MIPS32_SW(2,0,15),								/* sw $2,($15) */
+			MIPS32_LUI(1,UPPER16(MIPS32_PRACC_PARAM_OUT)),	/* $1 = MIPS32_PRACC_PARAM_OUT */
 			MIPS32_ORI(1,1,LOWER16(MIPS32_PRACC_PARAM_OUT)),
 			MIPS32_MFC0(2,23,0),							/* move COP0 Debug to $2 */
 			MIPS32_SW(2,0,1),
 			MIPS32_LW(2,0,15),
 			MIPS32_LW(1,0,15),
+			MIPS32_B(NEG16(12)),
 			MIPS32_MFC0(15,31,0),							/* move COP0 DeSave to $15 */
-			MIPS32_NOP,
-			MIPS32_B(NEG16(14)),
-			MIPS32_NOP,
 	};
 
-	mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
+	return mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code,
 		0, NULL, 1, debug_reg, 1);
-
-	return ERROR_OK;
 }
 
 int mips_ejtag_init(struct mips_ejtag *ejtag_info)
 {
 	uint32_t ejtag_version;
+	int retval;
 
-	mips_ejtag_get_impcode(ejtag_info, &ejtag_info->impcode);
+	retval = mips_ejtag_get_impcode(ejtag_info, &ejtag_info->impcode);
+	if (retval != ERROR_OK)
+		return retval;
 	LOG_DEBUG("impcode: 0x%8.8" PRIx32 "", ejtag_info->impcode);
 
 	/* get ejtag version */
@@ -269,20 +321,61 @@ int mips_ejtag_init(struct mips_ejtag *ejtag_info)
 			break;
 	}
 	LOG_DEBUG("EJTAG: features:%s%s%s%s%s%s%s",
-		ejtag_info->impcode & (1 << 28) ? " R3k":    " R4k",
-		ejtag_info->impcode & (1 << 24) ? " DINT":   "",
-		ejtag_info->impcode & (1 << 22) ? " ASID_8": "",
-		ejtag_info->impcode & (1 << 21) ? " ASID_6": "",
-		ejtag_info->impcode & (1 << 16) ? " MIPS16": "",
-		ejtag_info->impcode & (1 << 14) ? " noDMA":  " DMA",
-		ejtag_info->impcode & (1 << 0)  ? " MIPS64": " MIPS32"
-);
-
-	if ((ejtag_info->impcode & (1 << 14)) == 0)
+		ejtag_info->impcode & EJTAG_IMP_R3K ? " R3k" : " R4k",
+		ejtag_info->impcode & EJTAG_IMP_DINT ? " DINT" : "",
+		ejtag_info->impcode & (1 << 22) ? " ASID_8" : "",
+		ejtag_info->impcode & (1 << 21) ? " ASID_6" : "",
+		ejtag_info->impcode & EJTAG_IMP_MIPS16 ? " MIPS16" : "",
+		ejtag_info->impcode & EJTAG_IMP_NODMA ? " noDMA" : " DMA",
+		ejtag_info->impcode & EJTAG_DCR_MIPS64  ? " MIPS64" : " MIPS32");
+
+	if ((ejtag_info->impcode & EJTAG_IMP_NODMA) == 0)
 		LOG_DEBUG("EJTAG: DMA Access Mode Support Enabled");
 
 	/* set initial state for ejtag control reg */
 	ejtag_info->ejtag_ctrl = EJTAG_CTRL_ROCC | EJTAG_CTRL_PRACC | EJTAG_CTRL_PROBEN | EJTAG_CTRL_SETDEV;
+	ejtag_info->fast_access_save = -1;
+
+	return ERROR_OK;
+}
+
+int mips_ejtag_fastdata_scan(struct mips_ejtag *ejtag_info, int write_t, uint32_t *data)
+{
+	struct jtag_tap *tap;
+
+	tap = ejtag_info->tap;
+	assert(tap != NULL);
+
+	struct scan_field fields[2];
+	uint8_t spracc = 0;
+	uint8_t t[4] = {0, 0, 0, 0};
+
+	/* fastdata 1-bit register */
+	fields[0].num_bits = 1;
+	fields[0].out_value = &spracc;
+	fields[0].in_value = NULL;
+
+	/* processor access data register 32 bit */
+	fields[1].num_bits = 32;
+	fields[1].out_value = t;
+
+	if (write_t)
+	{
+		fields[1].in_value = NULL;
+		buf_set_u32(t, 0, 32, *data);
+	}
+	else
+	{
+		fields[1].in_value = (void *) data;
+	}
+
+	jtag_add_dr_scan(tap, 2, fields, TAP_IDLE);
+
+	if ( (!write_t) && (data) )
+		jtag_add_callback(mips_le_to_h_u32,
+			(jtag_callback_data_t) data);
+
+	keep_alive();
 
 	return ERROR_OK;
 }