X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Ftarget%2Fmips32_pracc.c;h=790c8dc93e23acaf5319b4ac279b4d04f59a4653;hp=45d22427313b181e8d26c37bc17ea47e2d843953;hb=8f518d3592dd80bfc7637d16498f2994038ab77c;hpb=cb317eabf2d162365467aeb89b564828e5e6d6f3

diff --git a/src/target/mips32_pracc.c b/src/target/mips32_pracc.c
index 45d2242731..790c8dc93e 100644
--- a/src/target/mips32_pracc.c
+++ b/src/target/mips32_pracc.c
@@ -122,8 +122,8 @@ static void mips32_pracc_finish(struct mips_ejtag *ejtag_info)
 
 int mips32_pracc_clean_text_jump(struct mips_ejtag *ejtag_info)
 {
-	uint32_t jt_code = MIPS32_J((0x0FFFFFFF & MIPS32_PRACC_TEXT) >> 2);
-
+	uint32_t jt_code = MIPS32_J(ejtag_info->isa, MIPS32_PRACC_TEXT);
+	pracc_swap16_array(ejtag_info, &jt_code, 1);
 	/* do 3 0/nops to clean pipeline before a jump to pracc text, NOP in delay slot */
 	for (int i = 0; i != 5; i++) {
 		/* Wait for pracc */
@@ -148,7 +148,7 @@ int mips32_pracc_clean_text_jump(struct mips_ejtag *ejtag_info)
 		if (retval != ERROR_OK)
 			return retval;
 
-		if (ejtag_info->pa_addr != MIPS32_PRACC_TEXT) {		/* LEXRA/BMIPS ?, shift out another NOP, max 2 */
+		if (ejtag_info->pa_addr != MIPS32_PRACC_TEXT) {	/* LEXRA/BMIPS ?, shift out another NOP, max 2 */
 			mips_ejtag_set_instr(ejtag_info, EJTAG_INST_DATA);
 			mips_ejtag_drscan_32_out(ejtag_info, MIPS32_NOP);
 			mips32_pracc_finish(ejtag_info);
@@ -159,10 +159,11 @@ int mips32_pracc_clean_text_jump(struct mips_ejtag *ejtag_info)
 	return ERROR_OK;
 }
 
-int mips32_pracc_exec(struct mips_ejtag *ejtag_info, struct pracc_queue_info *ctx, uint32_t *param_out)
+int mips32_pracc_exec(struct mips_ejtag *ejtag_info, struct pracc_queue_info *ctx,
+					uint32_t *param_out, bool check_last)
 {
 	int code_count = 0;
-	int store_pending = 0;		/* increases with every store instruction at dmseg, decreases with every store pa */
+	int store_pending = 0;		/* increases with every store instr at dmseg, decreases with every store pa */
 	uint32_t max_store_addr = 0;	/* for store pa address testing */
 	bool restart = 0;		/* restarting control */
 	int restart_count = 0;
@@ -185,12 +186,12 @@ int mips32_pracc_exec(struct mips_ejtag *ejtag_info, struct pracc_queue_info *ct
 			LOG_DEBUG("restarting code");
 		}
 
-		retval = mips32_pracc_read_ctrl_addr(ejtag_info);		/* update current pa info: control and address */
+		retval = mips32_pracc_read_ctrl_addr(ejtag_info); /* update current pa info: control and address */
 		if (retval != ERROR_OK)
 			return retval;
 
 		/* Check for read or write access */
-		if (ejtag_info->pa_ctrl & EJTAG_CTRL_PRNW) {						/* write/store access */
+		if (ejtag_info->pa_ctrl & EJTAG_CTRL_PRNW) {				/* write/store access */
 			/* Check for pending store from a previous store instruction at dmseg */
 			if (store_pending == 0) {
 				LOG_DEBUG("unexpected write at address %" PRIx32, ejtag_info->pa_addr);
@@ -201,8 +202,8 @@ int mips32_pracc_exec(struct mips_ejtag *ejtag_info, struct pracc_queue_info *ct
 					return ERROR_JTAG_DEVICE_ERROR;
 			} else {
 				/* check address */
-				if (ejtag_info->pa_addr < MIPS32_PRACC_PARAM_OUT || ejtag_info->pa_addr > max_store_addr) {
-
+				if (ejtag_info->pa_addr < MIPS32_PRACC_PARAM_OUT ||
+						ejtag_info->pa_addr > max_store_addr) {
 					LOG_DEBUG("writing at unexpected address %" PRIx32, ejtag_info->pa_addr);
 					return ERROR_JTAG_DEVICE_ERROR;
 				}
@@ -226,7 +227,8 @@ int mips32_pracc_exec(struct mips_ejtag *ejtag_info, struct pracc_queue_info *ct
 							ejtag_info->pa_addr, MIPS32_PRACC_TEXT + code_count * 4);
 
 					/* restart code execution only in some cases */
-					if (code_count == 1 && ejtag_info->pa_addr == MIPS32_PRACC_TEXT && restart_count == 0) {
+					if (code_count == 1 && ejtag_info->pa_addr == MIPS32_PRACC_TEXT &&
+										restart_count == 0) {
 						LOG_DEBUG("restarting, without clean jump");
 						restart_count++;
 						code_count = 0;
@@ -235,18 +237,17 @@ int mips32_pracc_exec(struct mips_ejtag *ejtag_info, struct pracc_queue_info *ct
 						restart = 1;
 						continue;
 					}
-
 					return ERROR_JTAG_DEVICE_ERROR;
 				}
 				/* check for store instruction at dmseg */
-				uint32_t store_addr = ctx->pracc_list[ctx->max_code + code_count];
+				uint32_t store_addr = ctx->pracc_list[code_count].addr;
 				if (store_addr != 0) {
 					if (store_addr > max_store_addr)
 						max_store_addr = store_addr;
 					store_pending++;
 				}
 
-				instr = ctx->pracc_list[code_count++];
+				instr = ctx->pracc_list[code_count++].instr;
 				if (code_count == ctx->code_count)	/* last instruction, start final check */
 					final_check = 1;
 
@@ -264,13 +265,14 @@ int mips32_pracc_exec(struct mips_ejtag *ejtag_info, struct pracc_queue_info *ct
 					}
 				} else {
 					if (ejtag_info->pa_addr != (MIPS32_PRACC_TEXT + code_count * 4)) {
-						LOG_DEBUG("unexpected read address in final check: %" PRIx32 ", expected: %x",
-							  ejtag_info->pa_addr, MIPS32_PRACC_TEXT + code_count * 4);
+						LOG_DEBUG("unexpected read address in final check: %"
+							PRIx32 ", expected: %x", ejtag_info->pa_addr,
+							MIPS32_PRACC_TEXT + code_count * 4);
 						return ERROR_JTAG_DEVICE_ERROR;
 					}
 				}
 				if (!pass) {
-					if ((code_count - ctx->code_count) > 1) {	 /* allow max 2 instruction delay slot */
+					if ((code_count - ctx->code_count) > 1) { /* allow max 2 instr delay slot */
 						LOG_DEBUG("failed to jump back to pracc text");
 						return ERROR_JTAG_DEVICE_ERROR;
 					}
@@ -290,7 +292,7 @@ int mips32_pracc_exec(struct mips_ejtag *ejtag_info, struct pracc_queue_info *ct
 		/* finish processor access, let the processor eat! */
 		mips32_pracc_finish(ejtag_info);
 
-		if (instr == MIPS32_DRET)	/* after leaving debug mode nothing to do */
+		if (final_check && !check_last)			/* last instr, don't check, execute and exit */
 			return jtag_execute_queue();
 
 		if (store_pending == 0 && pass) {	/* store access done, but after passing pracc text */
@@ -305,46 +307,63 @@ inline void pracc_queue_init(struct pracc_queue_info *ctx)
 	ctx->retval = ERROR_OK;
 	ctx->code_count = 0;
 	ctx->store_count = 0;
-
-	ctx->pracc_list = malloc(2 * ctx->max_code * sizeof(uint32_t));
-	if (ctx->pracc_list == NULL) {
-		LOG_ERROR("Out of memory");
-		ctx->retval = ERROR_FAIL;
-	}
+	ctx->max_code = 0;
+	ctx->pracc_list = NULL;
+	ctx->isa = ctx->ejtag_info->isa ? 1 : 0;
 }
 
-inline void pracc_add(struct pracc_queue_info *ctx, uint32_t addr, uint32_t instr)
+void pracc_add(struct pracc_queue_info *ctx, uint32_t addr, uint32_t instr)
 {
-	ctx->pracc_list[ctx->max_code + ctx->code_count] = addr;
-	ctx->pracc_list[ctx->code_count++] = instr;
+	if (ctx->retval != ERROR_OK)	/* On previous out of memory, return */
+		return;
+	if (ctx->code_count == ctx->max_code) {
+		void *p = realloc(ctx->pracc_list, sizeof(pa_list) * (ctx->max_code + PRACC_BLOCK));
+		if (p) {
+			ctx->max_code += PRACC_BLOCK;
+			ctx->pracc_list = p;
+		} else {
+			ctx->retval = ERROR_FAIL;	/* Out of memory */
+			return;
+		}
+	}
+	ctx->pracc_list[ctx->code_count].instr = instr;
+	ctx->pracc_list[ctx->code_count++].addr = addr;
 	if (addr)
 		ctx->store_count++;
 }
 
-inline void pracc_add_li32(struct pracc_queue_info *ctx, uint32_t reg_num, uint32_t data, bool optimize)
+void pracc_add_li32(struct pracc_queue_info *ctx, uint32_t reg_num, uint32_t data, bool optimize)
 {
 	if (LOWER16(data) == 0 && optimize)
-		pracc_add(ctx, 0, MIPS32_LUI(reg_num, UPPER16(data)));	/* load only upper value */
+		pracc_add(ctx, 0, MIPS32_LUI(ctx->isa, reg_num, UPPER16(data)));	/* load only upper value */
 	else if (UPPER16(data) == 0 && optimize)
-		pracc_add(ctx, 0, MIPS32_ORI(reg_num, 0, LOWER16(data)));	/* load only lower */
+		pracc_add(ctx, 0, MIPS32_ORI(ctx->isa, reg_num, 0, LOWER16(data)));	/* load only lower */
 	else {
-		pracc_add(ctx, 0, MIPS32_LUI(reg_num, UPPER16(data)));		/* load upper and lower */
-		pracc_add(ctx, 0, MIPS32_ORI(reg_num, reg_num, LOWER16(data)));
+		pracc_add(ctx, 0, MIPS32_LUI(ctx->isa, reg_num, UPPER16(data)));	/* load upper and lower */
+		pracc_add(ctx, 0, MIPS32_ORI(ctx->isa, reg_num, reg_num, LOWER16(data)));
 	}
 }
 
 inline void pracc_queue_free(struct pracc_queue_info *ctx)
 {
-	if (ctx->code_count > ctx->max_code)	/* Only for internal check, will be erased */
-		LOG_ERROR("Internal error, code count: %d > max code: %d", ctx->code_count, ctx->max_code);
 	if (ctx->pracc_list != NULL)
 		free(ctx->pracc_list);
 }
 
-int mips32_pracc_queue_exec(struct mips_ejtag *ejtag_info, struct pracc_queue_info *ctx, uint32_t *buf)
+int mips32_pracc_queue_exec(struct mips_ejtag *ejtag_info, struct pracc_queue_info *ctx,
+					uint32_t *buf, bool check_last)
 {
+	if (ctx->retval != ERROR_OK) {
+		LOG_ERROR("Out of memory");
+		return ERROR_FAIL;
+	}
+
+	if (ejtag_info->isa && ejtag_info->endianness)
+		for (int i = 0; i != ctx->code_count; i++)
+			ctx->pracc_list[i].instr = SWAP16(ctx->pracc_list[i].instr);
+
 	if (ejtag_info->mode == 0)
-		return mips32_pracc_exec(ejtag_info, ctx, buf);
+		return mips32_pracc_exec(ejtag_info, ctx, buf, check_last);
 
 	union scan_in {
 		uint8_t scan_96[12];
@@ -367,16 +386,16 @@ int mips32_pracc_queue_exec(struct mips_ejtag *ejtag_info, struct pracc_queue_in
 	mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ALL);
 
 	int scan_count = 0;
-	for (int i = 0; i != 2 * ctx->code_count; i++) {
-		uint32_t data = 0;
-		if (i & 1u) {			/* Check store address from previous instruction, if not the first */
-			if (i < 2 || 0 == ctx->pracc_list[ctx->max_code + (i / 2) - 1])
-				continue;
-		} else
-			data = ctx->pracc_list[i / 2];
-
+	for (int i = 0; i != ctx->code_count; i++) {
 		jtag_add_clocks(num_clocks);
-		mips_ejtag_add_scan_96(ejtag_info, ejtag_ctrl, data, scan_in[scan_count++].scan_96);
+		mips_ejtag_add_scan_96(ejtag_info, ejtag_ctrl, ctx->pracc_list[i].instr,
+				       scan_in[scan_count++].scan_96);
+
+		/* Check store address from previous instruction, if not the first */
+		if (i > 0 && ctx->pracc_list[i - 1].addr) {
+			jtag_add_clocks(num_clocks);
+			mips_ejtag_add_scan_96(ejtag_info, ejtag_ctrl, 0, scan_in[scan_count++].scan_96);
+		}
 	}
 
 	int retval = jtag_execute_queue();		/* execute queued scans */
@@ -385,24 +404,35 @@ int mips32_pracc_queue_exec(struct mips_ejtag *ejtag_info, struct pracc_queue_in
 
 	uint32_t fetch_addr = MIPS32_PRACC_TEXT;		/* start address */
 	scan_count = 0;
-	for (int i = 0; i != 2 * ctx->code_count; i++) {				/* verify every pracc access */
-		uint32_t store_addr = 0;
-		if (i & 1u) {			/* Read store addres from previous instruction, if not the first */
-			store_addr = ctx->pracc_list[ctx->max_code + (i / 2) - 1];
-			if (i < 2 || 0 == store_addr)
-				continue;
-		}
-
+	for (int i = 0; i != ctx->code_count; i++) {				/* verify every pracc access */
+		/* check pracc bit */
 		ejtag_ctrl = buf_get_u32(scan_in[scan_count].scan_32.ctrl, 0, 32);
+		uint32_t addr = buf_get_u32(scan_in[scan_count].scan_32.addr, 0, 32);
 		if (!(ejtag_ctrl & EJTAG_CTRL_PRACC)) {
 			LOG_ERROR("Error: access not pending  count: %d", scan_count);
 			retval = ERROR_FAIL;
 			goto exit;
 		}
+		if (ejtag_ctrl & EJTAG_CTRL_PRNW) {
+			LOG_ERROR("Not a fetch/read access, count: %d", scan_count);
+			retval = ERROR_FAIL;
+			goto exit;
+		}
+		if (addr != fetch_addr) {
+			LOG_ERROR("Fetch addr mismatch, read: %" PRIx32 " expected: %" PRIx32 " count: %d",
+					  addr, fetch_addr, scan_count);
+			retval = ERROR_FAIL;
+			goto exit;
+		}
+		fetch_addr += 4;
+		scan_count++;
 
-		uint32_t addr = buf_get_u32(scan_in[scan_count].scan_32.addr, 0, 32);
+		/* check if previous intrucction is a store instruction at dmesg */
+		if (i > 0 && ctx->pracc_list[i - 1].addr) {
+			uint32_t store_addr = ctx->pracc_list[i - 1].addr;
+			ejtag_ctrl = buf_get_u32(scan_in[scan_count].scan_32.ctrl, 0, 32);
+			addr = buf_get_u32(scan_in[scan_count].scan_32.addr, 0, 32);
 
-		if (store_addr != 0) {
 			if (!(ejtag_ctrl & EJTAG_CTRL_PRNW)) {
 				LOG_ERROR("Not a store/write access, count: %d", scan_count);
 				retval = ERROR_FAIL;
@@ -410,28 +440,14 @@ int mips32_pracc_queue_exec(struct mips_ejtag *ejtag_info, struct pracc_queue_in
 			}
 			if (addr != store_addr) {
 				LOG_ERROR("Store address mismatch, read: %" PRIx32 " expected: %" PRIx32 " count: %d",
-						addr, store_addr, scan_count);
+							      addr, store_addr, scan_count);
 				retval = ERROR_FAIL;
 				goto exit;
 			}
 			int buf_index = (addr - MIPS32_PRACC_PARAM_OUT) / 4;
 			buf[buf_index] = buf_get_u32(scan_in[scan_count].scan_32.data, 0, 32);
-
-		} else {
-			if (ejtag_ctrl & EJTAG_CTRL_PRNW) {
-				LOG_ERROR("Not a fetch/read access, count: %d", scan_count);
-				retval = ERROR_FAIL;
-				goto exit;
-			}
-			if (addr != fetch_addr) {
-				LOG_ERROR("Fetch addr mismatch, read: %" PRIx32 " expected: %" PRIx32 " count: %d",
-					  addr, fetch_addr, scan_count);
-				retval = ERROR_FAIL;
-				goto exit;
-			}
-			fetch_addr += 4;
+			scan_count++;
 		}
-		scan_count++;
 	}
 exit:
 	free(scan_in);
@@ -440,22 +456,19 @@ exit:
 
 int mips32_pracc_read_u32(struct mips_ejtag *ejtag_info, uint32_t addr, uint32_t *buf)
 {
-	struct pracc_queue_info ctx = {.max_code = 8};
+	struct pracc_queue_info ctx = {.ejtag_info = ejtag_info};
 	pracc_queue_init(&ctx);
-	if (ctx.retval != ERROR_OK)
-		goto exit;
 
-	pracc_add(&ctx, 0, MIPS32_LUI(15, PRACC_UPPER_BASE_ADDR));			/* $15 = MIPS32_PRACC_BASE_ADDR */
-	pracc_add(&ctx, 0, MIPS32_LUI(8, UPPER16((addr + 0x8000))));		/* load  $8 with modified upper address */
-	pracc_add(&ctx, 0, MIPS32_LW(8, LOWER16(addr), 8));				/* lw $8, LOWER16(addr)($8) */
+	pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 15, PRACC_UPPER_BASE_ADDR));	/* $15 = MIPS32_PRACC_BASE_ADDR */
+	pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 8, UPPER16((addr + 0x8000)))); /* load  $8 with modified upper addr */
+	pracc_add(&ctx, 0, MIPS32_LW(ctx.isa, 8, LOWER16(addr), 8));			/* lw $8, LOWER16(addr)($8) */
 	pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT,
-				MIPS32_SW(8, PRACC_OUT_OFFSET, 15));			/* sw $8,PRACC_OUT_OFFSET($15) */
+				MIPS32_SW(ctx.isa, 8, PRACC_OUT_OFFSET, 15));	/* sw $8,PRACC_OUT_OFFSET($15) */
 	pracc_add_li32(&ctx, 8, ejtag_info->reg8, 0);				/* restore $8 */
-	pracc_add(&ctx, 0, MIPS32_B(NEG16(ctx.code_count + 1)));					/* jump to start */
-	pracc_add(&ctx, 0, MIPS32_MFC0(15, 31, 0));					/* move COP0 DeSave to $15 */
+	pracc_add(&ctx, 0, MIPS32_B(ctx.isa, NEG16((ctx.code_count + 1) << ctx.isa)));		/* jump to start */
+	pracc_add(&ctx, 0, MIPS32_MFC0(ctx.isa, 15, 31, 0));				/* move COP0 DeSave to $15 */
 
-	ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, buf);
-exit:
+	ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, buf, 1);
 	pracc_queue_free(&ctx);
 	return ctx.retval;
 }
@@ -465,12 +478,10 @@ int mips32_pracc_read_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int size
 	if (count == 1 && size == 4)
 		return mips32_pracc_read_u32(ejtag_info, addr, (uint32_t *)buf);
 
-	uint32_t *data = NULL;
-	struct pracc_queue_info ctx = {.max_code = 256 * 3 + 8 + 1};	/* alloc memory for the worst case */
+	struct pracc_queue_info ctx = {.ejtag_info = ejtag_info};
 	pracc_queue_init(&ctx);
-	if (ctx.retval != ERROR_OK)
-		goto exit;
 
+	uint32_t *data = NULL;
 	if (size != 4) {
 		data = malloc(256 * sizeof(uint32_t));
 		if (data == NULL) {
@@ -486,43 +497,44 @@ int mips32_pracc_read_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int size
 	while (count) {
 		ctx.code_count = 0;
 		ctx.store_count = 0;
+
 		int this_round_count = (count > 256) ? 256 : count;
 		uint32_t last_upper_base_addr = UPPER16((addr + 0x8000));
 
-		pracc_add(&ctx, 0, MIPS32_LUI(15, PRACC_UPPER_BASE_ADDR));			/* $15 = MIPS32_PRACC_BASE_ADDR */
-		pracc_add(&ctx, 0, MIPS32_LUI(9, last_upper_base_addr));		/* load the upper memory address in $9 */
+		pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 15, PRACC_UPPER_BASE_ADDR)); /* $15 = MIPS32_PRACC_BASE_ADDR */
+		pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 9, last_upper_base_addr));	/* upper memory addr to $9 */
 
 		for (int i = 0; i != this_round_count; i++) {			/* Main code loop */
 			uint32_t upper_base_addr = UPPER16((addr + 0x8000));
-			if (last_upper_base_addr != upper_base_addr) {			/* if needed, change upper address in $9 */
-				pracc_add(&ctx, 0, MIPS32_LUI(9, upper_base_addr));
+			if (last_upper_base_addr != upper_base_addr) {	/* if needed, change upper addr in $9 */
+				pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 9, upper_base_addr));
 				last_upper_base_addr = upper_base_addr;
 			}
 
-			if (size == 4)
-				pracc_add(&ctx, 0, MIPS32_LW(8, LOWER16(addr), 9));		/* load from memory to $8 */
+			if (size == 4)				/* load from memory to $8 */
+				pracc_add(&ctx, 0, MIPS32_LW(ctx.isa, 8, LOWER16(addr), 9));
 			else if (size == 2)
-				pracc_add(&ctx, 0, MIPS32_LHU(8, LOWER16(addr), 9));
+				pracc_add(&ctx, 0, MIPS32_LHU(ctx.isa, 8, LOWER16(addr), 9));
 			else
-				pracc_add(&ctx, 0, MIPS32_LBU(8, LOWER16(addr), 9));
+				pracc_add(&ctx, 0, MIPS32_LBU(ctx.isa, 8, LOWER16(addr), 9));
 
-			pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT + i * 4,
-					  MIPS32_SW(8, PRACC_OUT_OFFSET + i * 4, 15));		/* store $8 at param out */
+			pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT + i * 4,			/* store $8 at param out */
+					  MIPS32_SW(ctx.isa, 8, PRACC_OUT_OFFSET + i * 4, 15));
 			addr += size;
 		}
 		pracc_add_li32(&ctx, 8, ejtag_info->reg8, 0);				/* restore $8 */
 		pracc_add_li32(&ctx, 9, ejtag_info->reg9, 0);				/* restore $9 */
 
-		pracc_add(&ctx, 0, MIPS32_B(NEG16(ctx.code_count + 1)));				/* jump to start */
-		pracc_add(&ctx, 0, MIPS32_MFC0(15, 31, 0));					/* restore $15 from DeSave */
+		pracc_add(&ctx, 0, MIPS32_B(ctx.isa, NEG16((ctx.code_count + 1) << ctx.isa)));	/* jump to start */
+		pracc_add(&ctx, 0, MIPS32_MFC0(ctx.isa, 15, 31, 0));			/* restore $15 from DeSave */
 
 		if (size == 4) {
-			ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, buf32);
+			ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, buf32, 1);
 			if (ctx.retval != ERROR_OK)
 				goto exit;
 			buf32 += this_round_count;
 		} else {
-			ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, data);
+			ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, data, 1);
 			if (ctx.retval != ERROR_OK)
 				goto exit;
 
@@ -545,41 +557,35 @@ exit:
 
 int mips32_cp0_read(struct mips_ejtag *ejtag_info, uint32_t *val, uint32_t cp0_reg, uint32_t cp0_sel)
 {
-	struct pracc_queue_info ctx = {.max_code = 7};
+	struct pracc_queue_info ctx = {.ejtag_info = ejtag_info};
 	pracc_queue_init(&ctx);
-	if (ctx.retval != ERROR_OK)
-		goto exit;
 
-	pracc_add(&ctx, 0, MIPS32_LUI(15, PRACC_UPPER_BASE_ADDR));			/* $15 = MIPS32_PRACC_BASE_ADDR */
-	pracc_add(&ctx, 0, MIPS32_MFC0(8, cp0_reg, cp0_sel));			/* move cp0 reg / sel to $8 */
+	pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 15, PRACC_UPPER_BASE_ADDR));	/* $15 = MIPS32_PRACC_BASE_ADDR */
+	pracc_add(&ctx, 0, MIPS32_MFC0(ctx.isa, 8, cp0_reg, cp0_sel));		/* move cp0 reg / sel to $8 */
 	pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT,
-				MIPS32_SW(8, PRACC_OUT_OFFSET, 15));			/* store $8 to pracc_out */
-	pracc_add(&ctx, 0, MIPS32_MFC0(15, 31, 0));					/* restore $15 from DeSave */
-	pracc_add(&ctx, 0, MIPS32_LUI(8, UPPER16(ejtag_info->reg8)));		/* restore upper 16 bits  of $8 */
-	pracc_add(&ctx, 0, MIPS32_B(NEG16(ctx.code_count + 1)));					/* jump to start */
-	pracc_add(&ctx, 0, MIPS32_ORI(8, 8, LOWER16(ejtag_info->reg8)));		/* restore lower 16 bits of $8 */
+				MIPS32_SW(ctx.isa, 8, PRACC_OUT_OFFSET, 15));	/* store $8 to pracc_out */
+	pracc_add(&ctx, 0, MIPS32_MFC0(ctx.isa, 15, 31, 0));				/* restore $15 from DeSave */
+	pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 8, UPPER16(ejtag_info->reg8)));	/* restore upper 16 bits  of $8 */
+	pracc_add(&ctx, 0, MIPS32_B(ctx.isa, NEG16((ctx.code_count + 1) << ctx.isa)));		/* jump to start */
+	pracc_add(&ctx, 0, MIPS32_ORI(ctx.isa, 8, 8, LOWER16(ejtag_info->reg8))); /* restore lower 16 bits of $8 */
 
-	ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, val);
-exit:
+	ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, val, 1);
 	pracc_queue_free(&ctx);
 	return ctx.retval;
 }
 
 int mips32_cp0_write(struct mips_ejtag *ejtag_info, uint32_t val, uint32_t cp0_reg, uint32_t cp0_sel)
 {
-	struct pracc_queue_info ctx = {.max_code = 6};
+	struct pracc_queue_info ctx = {.ejtag_info = ejtag_info};
 	pracc_queue_init(&ctx);
-	if (ctx.retval != ERROR_OK)
-		goto exit;
 
 	pracc_add_li32(&ctx, 15, val, 0);				/* Load val to $15 */
 
-	pracc_add(&ctx, 0, MIPS32_MTC0(15, cp0_reg, cp0_sel));			/* write $15 to cp0 reg / sel */
-	pracc_add(&ctx, 0, MIPS32_B(NEG16(ctx.code_count + 1)));		/* jump to start */
-	pracc_add(&ctx, 0, MIPS32_MFC0(15, 31, 0));				/* restore $15 from DeSave */
+	pracc_add(&ctx, 0, MIPS32_MTC0(ctx.isa, 15, cp0_reg, cp0_sel));		/* write $15 to cp0 reg / sel */
+	pracc_add(&ctx, 0, MIPS32_B(ctx.isa, NEG16((ctx.code_count + 1) << ctx.isa)));		/* jump to start */
+	pracc_add(&ctx, 0, MIPS32_MFC0(ctx.isa, 15, 31, 0));			/* restore $15 from DeSave */
 
-	ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, NULL);
-exit:
+	ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, NULL, 1);
 	pracc_queue_free(&ctx);
 	return ctx.retval;
 }
@@ -614,26 +620,25 @@ exit:
 static int mips32_pracc_synchronize_cache(struct mips_ejtag *ejtag_info,
 					 uint32_t start_addr, uint32_t end_addr, int cached, int rel)
 {
-	struct pracc_queue_info ctx = {.max_code = 256 * 2 + 5};
+	struct pracc_queue_info ctx = {.ejtag_info = ejtag_info};
 	pracc_queue_init(&ctx);
-	if (ctx.retval != ERROR_OK)
-		goto exit;
+
 	/** Find cache line size in bytes */
 	uint32_t clsiz;
 	if (rel) {	/* Release 2 (rel = 1) */
-		pracc_add(&ctx, 0, MIPS32_LUI(15, PRACC_UPPER_BASE_ADDR));			/* $15 = MIPS32_PRACC_BASE_ADDR */
+		pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 15, PRACC_UPPER_BASE_ADDR)); /* $15 = MIPS32_PRACC_BASE_ADDR */
 
-		pracc_add(&ctx, 0, MIPS32_RDHWR(8, MIPS32_SYNCI_STEP));			/* load synci_step value to $8 */
+		pracc_add(&ctx, 0, MIPS32_RDHWR(ctx.isa, 8, MIPS32_SYNCI_STEP)); /* load synci_step value to $8 */
 
 		pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT,
-				MIPS32_SW(8, PRACC_OUT_OFFSET, 15));			/* store $8 to pracc_out */
+				MIPS32_SW(ctx.isa, 8, PRACC_OUT_OFFSET, 15));		/* store $8 to pracc_out */
 
 		pracc_add_li32(&ctx, 8, ejtag_info->reg8, 0);				/* restore $8 */
 
-		pracc_add(&ctx, 0, MIPS32_B(NEG16(ctx.code_count + 1)));					/* jump to start */
-		pracc_add(&ctx, 0, MIPS32_MFC0(15, 31, 0));					/* move COP0 DeSave to $15 */
+		pracc_add(&ctx, 0, MIPS32_B(ctx.isa, NEG16((ctx.code_count + 1) << ctx.isa)));	/* jump to start */
+		pracc_add(&ctx, 0, MIPS32_MFC0(ctx.isa, 15, 31, 0));			/* restore $15 from DeSave */
 
-		ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, &clsiz);
+		ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, &clsiz, 1);
 		if (ctx.retval != ERROR_OK)
 			goto exit;
 
@@ -666,47 +671,50 @@ static int mips32_pracc_synchronize_cache(struct mips_ejtag *ejtag_info,
 	end_addr |= clsiz - 1;
 
 	ctx.code_count = 0;
+	ctx.store_count = 0;
+
 	int count = 0;
 	uint32_t last_upper_base_addr = UPPER16((start_addr + 0x8000));
 
-	pracc_add(&ctx, 0, MIPS32_LUI(15, last_upper_base_addr));		/* load upper memory base address to $15 */
+	pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 15, last_upper_base_addr)); /* load upper memory base addr to $15 */
 
 	while (start_addr <= end_addr) {						/* main loop */
 		uint32_t upper_base_addr = UPPER16((start_addr + 0x8000));
-		if (last_upper_base_addr != upper_base_addr) {				/* if needed, change upper address in $15 */
-			pracc_add(&ctx, 0, MIPS32_LUI(15, upper_base_addr));
+		if (last_upper_base_addr != upper_base_addr) {		/* if needed, change upper addr in $15 */
+			pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 15, upper_base_addr));
 			last_upper_base_addr = upper_base_addr;
 		}
-		if (rel)
-			pracc_add(&ctx, 0, MIPS32_SYNCI(LOWER16(start_addr), 15));		/* synci instruction, offset($15) */
+		if (rel)			/* synci instruction, offset($15) */
+			pracc_add(&ctx, 0, MIPS32_SYNCI(ctx.isa, LOWER16(start_addr), 15));
 
 		else {
-			if (cached == 3)
-				pracc_add(&ctx, 0, MIPS32_CACHE(MIPS32_CACHE_D_HIT_WRITEBACK,
-							LOWER16(start_addr), 15));		/* cache Hit_Writeback_D, offset($15) */
-
-			pracc_add(&ctx, 0, MIPS32_CACHE(MIPS32_CACHE_I_HIT_INVALIDATE,
-							LOWER16(start_addr), 15));		/* cache Hit_Invalidate_I, offset($15) */
+			if (cached == 3)	/* cache Hit_Writeback_D, offset($15) */
+				pracc_add(&ctx, 0, MIPS32_CACHE(ctx.isa, MIPS32_CACHE_D_HIT_WRITEBACK,
+							LOWER16(start_addr), 15));
+			/* cache Hit_Invalidate_I, offset($15) */
+			pracc_add(&ctx, 0, MIPS32_CACHE(ctx.isa, MIPS32_CACHE_I_HIT_INVALIDATE,
+							LOWER16(start_addr), 15));
 		}
 		start_addr += clsiz;
 		count++;
-		if (count == 256 && start_addr <= end_addr) {				/* more ?, then execute code list */
-			pracc_add(&ctx, 0, MIPS32_B(NEG16(ctx.code_count + 1)));		/* jump to start */
-			pracc_add(&ctx, 0, MIPS32_NOP);						/* nop in delay slot */
+		if (count == 256 && start_addr <= end_addr) {			/* more ?, then execute code list */
+			pracc_add(&ctx, 0, MIPS32_B(ctx.isa, NEG16((ctx.code_count + 1) << ctx.isa)));	/* to start */
+			pracc_add(&ctx, 0, MIPS32_NOP);					/* nop in delay slot */
 
-			ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, NULL);
+			ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, NULL, 1);
 			if (ctx.retval != ERROR_OK)
 				goto exit;
 
-			ctx.code_count = 0;
+			ctx.code_count = 0;	/* reset counters for another loop */
+			ctx.store_count = 0;
 			count = 0;
 		}
 	}
-	pracc_add(&ctx, 0, MIPS32_SYNC);
-	pracc_add(&ctx, 0, MIPS32_B(NEG16(ctx.code_count + 1)));					/* jump to start */
-	pracc_add(&ctx, 0, MIPS32_MFC0(15, 31, 0));					/* restore $15 from DeSave*/
+	pracc_add(&ctx, 0, MIPS32_SYNC(ctx.isa));
+	pracc_add(&ctx, 0, MIPS32_B(ctx.isa, NEG16((ctx.code_count + 1) << ctx.isa)));		/* jump to start */
+	pracc_add(&ctx, 0, MIPS32_MFC0(ctx.isa, 15, 31, 0));				/* restore $15 from DeSave*/
 
-	ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, NULL);
+	ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, NULL, 1);
 exit:
 	pracc_queue_free(&ctx);
 	return ctx.retval;
@@ -715,10 +723,8 @@ exit:
 static int mips32_pracc_write_mem_generic(struct mips_ejtag *ejtag_info,
 		uint32_t addr, int size, int count, const void *buf)
 {
-	struct pracc_queue_info ctx = {.max_code = 128 * 3 + 5 + 1};	/* alloc memory for the worst case */
+	struct pracc_queue_info ctx = {.ejtag_info = ejtag_info};
 	pracc_queue_init(&ctx);
-	if (ctx.retval != ERROR_OK)
-		goto exit;
 
 	const uint32_t *buf32 = buf;
 	const uint16_t *buf16 = buf;
@@ -727,31 +733,32 @@ static int mips32_pracc_write_mem_generic(struct mips_ejtag *ejtag_info,
 	while (count) {
 		ctx.code_count = 0;
 		ctx.store_count = 0;
+
 		int this_round_count = (count > 128) ? 128 : count;
 		uint32_t last_upper_base_addr = UPPER16((addr + 0x8000));
-
-		pracc_add(&ctx, 0, MIPS32_LUI(15, last_upper_base_addr));		/* load $15 with memory base address */
+			      /* load $15 with memory base address */
+		pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 15, last_upper_base_addr));
 
 		for (int i = 0; i != this_round_count; i++) {
 			uint32_t upper_base_addr = UPPER16((addr + 0x8000));
-			if (last_upper_base_addr != upper_base_addr) {
-				pracc_add(&ctx, 0, MIPS32_LUI(15, upper_base_addr));	/* if needed, change upper address in $15*/
+			if (last_upper_base_addr != upper_base_addr) {	/* if needed, change upper address in $15*/
+				pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 15, upper_base_addr));
 				last_upper_base_addr = upper_base_addr;
 			}
 
 			if (size == 4) {
-				pracc_add_li32(&ctx, 8, *buf32, 1);			/* load with li32, optimize */
-				pracc_add(&ctx, 0, MIPS32_SW(8, LOWER16(addr), 15));		/* store word to memory */
+				pracc_add_li32(&ctx, 8, *buf32, 1);		/* load with li32, optimize */
+				pracc_add(&ctx, 0, MIPS32_SW(ctx.isa, 8, LOWER16(addr), 15)); /* store word to mem */
 				buf32++;
 
 			} else if (size == 2) {
-				pracc_add(&ctx, 0, MIPS32_ORI(8, 0, *buf16));		/* load lower value */
-				pracc_add(&ctx, 0, MIPS32_SH(8, LOWER16(addr), 15));	/* store half word to memory */
+				pracc_add(&ctx, 0, MIPS32_ORI(ctx.isa, 8, 0, *buf16));		/* load lower value */
+				pracc_add(&ctx, 0, MIPS32_SH(ctx.isa, 8, LOWER16(addr), 15)); /* store half word */
 				buf16++;
 
 			} else {
-				pracc_add(&ctx, 0, MIPS32_ORI(8, 0, *buf8));		/* load lower value */
-				pracc_add(&ctx, 0, MIPS32_SB(8, LOWER16(addr), 15));	/* store byte to memory */
+				pracc_add(&ctx, 0, MIPS32_ORI(ctx.isa, 8, 0, *buf8));		/* load lower value */
+				pracc_add(&ctx, 0, MIPS32_SB(ctx.isa, 8, LOWER16(addr), 15));	/* store byte */
 				buf8++;
 			}
 			addr += size;
@@ -759,10 +766,10 @@ static int mips32_pracc_write_mem_generic(struct mips_ejtag *ejtag_info,
 
 		pracc_add_li32(&ctx, 8, ejtag_info->reg8, 0);				/* restore $8 */
 
-		pracc_add(&ctx, 0, MIPS32_B(NEG16(ctx.code_count + 1)));				/* jump to start */
-		pracc_add(&ctx, 0, MIPS32_MFC0(15, 31, 0));				/* restore $15 from DeSave */
+		pracc_add(&ctx, 0, MIPS32_B(ctx.isa, NEG16((ctx.code_count + 1) << ctx.isa)));	/* jump to start */
+		pracc_add(&ctx, 0, MIPS32_MFC0(ctx.isa, 15, 31, 0));			/* restore $15 from DeSave */
 
-		ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, NULL);
+		ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, NULL, 1);
 		if (ctx.retval != ERROR_OK)
 			goto exit;
 		count -= this_round_count;
@@ -829,19 +836,17 @@ int mips32_pracc_write_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int siz
 
 int mips32_pracc_write_regs(struct mips_ejtag *ejtag_info, uint32_t *regs)
 {
-	static const uint32_t cp0_write_code[] = {
-		MIPS32_MTC0(1, 12, 0),							/* move $1 to status */
-		MIPS32_MTLO(1),									/* move $1 to lo */
-		MIPS32_MTHI(1),									/* move $1 to hi */
-		MIPS32_MTC0(1, 8, 0),							/* move $1 to badvaddr */
-		MIPS32_MTC0(1, 13, 0),							/* move $1 to cause*/
-		MIPS32_MTC0(1, 24, 0),							/* move $1 to depc (pc) */
-	};
-
-	struct pracc_queue_info ctx = {.max_code = 37 * 2 + 7 + 1};
+	struct pracc_queue_info ctx = {.ejtag_info = ejtag_info};
 	pracc_queue_init(&ctx);
-	if (ctx.retval != ERROR_OK)
-		goto exit;
+
+	uint32_t cp0_write_code[] = {
+		MIPS32_MTC0(ctx.isa, 1, 12, 0),					/* move $1 to status */
+		MIPS32_MTLO(ctx.isa, 1),						/* move $1 to lo */
+		MIPS32_MTHI(ctx.isa, 1),						/* move $1 to hi */
+		MIPS32_MTC0(ctx.isa, 1, 8, 0),					/* move $1 to badvaddr */
+		MIPS32_MTC0(ctx.isa, 1, 13, 0),					/* move $1 to cause*/
+		MIPS32_MTC0(ctx.isa, 1, 24, 0),					/* move $1 to depc (pc) */
+	};
 
 	/* load registers 2 to 31 with li32, optimize */
 	for (int i = 2; i < 32; i++)
@@ -851,61 +856,57 @@ int mips32_pracc_write_regs(struct mips_ejtag *ejtag_info, uint32_t *regs)
 		pracc_add_li32(&ctx, 1, regs[i + 32], 0);	/* load CPO value in $1 */
 		pracc_add(&ctx, 0, cp0_write_code[i]);			/* write value from $1 to CPO register */
 	}
-	pracc_add(&ctx, 0, MIPS32_MTC0(15, 31, 0));				/* load $15 in DeSave */
-	pracc_add(&ctx, 0, MIPS32_LUI(1, UPPER16((regs[1]))));			/* load upper half word in $1 */
-	pracc_add(&ctx, 0, MIPS32_B(NEG16(ctx.code_count + 1)));				/* jump to start */
-	pracc_add(&ctx, 0, MIPS32_ORI(1, 1, LOWER16((regs[1]))));		/* load lower half word in $1 */
+	pracc_add(&ctx, 0, MIPS32_MTC0(ctx.isa, 15, 31, 0));				/* load $15 in DeSave */
+	pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 1, UPPER16((regs[1]))));		/* load upper half word in $1 */
+	pracc_add(&ctx, 0, MIPS32_B(ctx.isa, NEG16((ctx.code_count + 1) << ctx.isa)));		/* jump to start */
+	pracc_add(&ctx, 0, MIPS32_ORI(ctx.isa, 1, 1, LOWER16((regs[1]))));	/* load lower half word in $1 */
 
-	ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, NULL);
+	ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, NULL, 1);
 
 	ejtag_info->reg8 = regs[8];
 	ejtag_info->reg9 = regs[9];
-exit:
 	pracc_queue_free(&ctx);
 	return ctx.retval;
 }
 
 int mips32_pracc_read_regs(struct mips_ejtag *ejtag_info, uint32_t *regs)
 {
-	static int cp0_read_code[] = {
-		MIPS32_MFC0(8, 12, 0),							/* move status to $8 */
-		MIPS32_MFLO(8),									/* move lo to $8 */
-		MIPS32_MFHI(8),									/* move hi to $8 */
-		MIPS32_MFC0(8, 8, 0),							/* move badvaddr to $8 */
-		MIPS32_MFC0(8, 13, 0),							/* move cause to $8 */
-		MIPS32_MFC0(8, 24, 0),							/* move depc (pc) to $8 */
-	};
-
-	struct pracc_queue_info ctx = {.max_code = 49};
+	struct pracc_queue_info ctx = {.ejtag_info = ejtag_info};
 	pracc_queue_init(&ctx);
-	if (ctx.retval != ERROR_OK)
-		goto exit;
 
-	pracc_add(&ctx, 0, MIPS32_MTC0(1, 31, 0));						/* move $1 to COP0 DeSave */
-	pracc_add(&ctx, 0, MIPS32_LUI(1, PRACC_UPPER_BASE_ADDR));				/* $1 = MIP32_PRACC_BASE_ADDR */
+	uint32_t cp0_read_code[] = {
+		MIPS32_MFC0(ctx.isa, 8, 12, 0),					/* move status to $8 */
+		MIPS32_MFLO(ctx.isa, 8),						/* move lo to $8 */
+		MIPS32_MFHI(ctx.isa, 8),						/* move hi to $8 */
+		MIPS32_MFC0(ctx.isa, 8, 8, 0),					/* move badvaddr to $8 */
+		MIPS32_MFC0(ctx.isa, 8, 13, 0),					/* move cause to $8 */
+		MIPS32_MFC0(ctx.isa, 8, 24, 0),					/* move depc (pc) to $8 */
+	};
+
+	pracc_add(&ctx, 0, MIPS32_MTC0(ctx.isa, 1, 31, 0));				/* move $1 to COP0 DeSave */
+	pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 1, PRACC_UPPER_BASE_ADDR));	/* $1 = MIP32_PRACC_BASE_ADDR */
 
 	for (int i = 2; i != 32; i++)					/* store GPR's 2 to 31 */
 		pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT + (i * 4),
-				  MIPS32_SW(i, PRACC_OUT_OFFSET + (i * 4), 1));
+				  MIPS32_SW(ctx.isa, i, PRACC_OUT_OFFSET + (i * 4), 1));
 
 	for (int i = 0; i != 6; i++) {
 		pracc_add(&ctx, 0, cp0_read_code[i]);				/* load COP0 needed registers to $8 */
 		pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT + (i + 32) * 4,			/* store $8 at PARAM OUT */
-				  MIPS32_SW(8, PRACC_OUT_OFFSET + (i + 32) * 4, 1));
+				  MIPS32_SW(ctx.isa, 8, PRACC_OUT_OFFSET + (i + 32) * 4, 1));
 	}
-	pracc_add(&ctx, 0, MIPS32_MFC0(8, 31, 0));					/* move DeSave to $8, reg1 value */
-	pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT + 4,					/* store reg1 value from $8 to param out */
-			  MIPS32_SW(8, PRACC_OUT_OFFSET + 4, 1));
+	pracc_add(&ctx, 0, MIPS32_MFC0(ctx.isa, 8, 31, 0));			/* move DeSave to $8, reg1 value */
+	pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT + 4,			/* store reg1 value from $8 to param out */
+			  MIPS32_SW(ctx.isa, 8, PRACC_OUT_OFFSET + 4, 1));
 
-	pracc_add(&ctx, 0, MIPS32_MFC0(1, 31, 0));					/* move COP0 DeSave to $1, restore reg1 */
-	pracc_add(&ctx, 0, MIPS32_B(NEG16(ctx.code_count + 1)));					/* jump to start */
-	pracc_add(&ctx, 0, MIPS32_MTC0(15, 31, 0));					/* load $15 in DeSave */
+	pracc_add(&ctx, 0, MIPS32_MFC0(ctx.isa, 1, 31, 0));		/* move COP0 DeSave to $1, restore reg1 */
+	pracc_add(&ctx, 0, MIPS32_B(ctx.isa, NEG16((ctx.code_count + 1) << ctx.isa)));		/* jump to start */
+	pracc_add(&ctx, 0, MIPS32_MTC0(ctx.isa, 15, 31, 0));				/* load $15 in DeSave */
 
-	ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, regs);
+	ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, regs, 1);
 
 	ejtag_info->reg8 = regs[8];	/* reg8 is saved but not restored, next called function should restore it */
 	ejtag_info->reg9 = regs[9];
-exit:
 	pracc_queue_free(&ctx);
 	return ctx.retval;
 }
@@ -920,38 +921,40 @@ exit:
 int mips32_pracc_fastdata_xfer(struct mips_ejtag *ejtag_info, struct working_area *source,
 		int write_t, uint32_t addr, int count, uint32_t *buf)
 {
+	uint32_t isa = ejtag_info->isa ? 1 : 0;
 	uint32_t handler_code[] = {
 		/* r15 points to the start of this code */
-		MIPS32_SW(8, MIPS32_FASTDATA_HANDLER_SIZE - 4, 15),
-		MIPS32_SW(9, MIPS32_FASTDATA_HANDLER_SIZE - 8, 15),
-		MIPS32_SW(10, MIPS32_FASTDATA_HANDLER_SIZE - 12, 15),
-		MIPS32_SW(11, MIPS32_FASTDATA_HANDLER_SIZE - 16, 15),
+		MIPS32_SW(isa, 8, MIPS32_FASTDATA_HANDLER_SIZE - 4, 15),
+		MIPS32_SW(isa, 9, MIPS32_FASTDATA_HANDLER_SIZE - 8, 15),
+		MIPS32_SW(isa, 10, MIPS32_FASTDATA_HANDLER_SIZE - 12, 15),
+		MIPS32_SW(isa, 11, MIPS32_FASTDATA_HANDLER_SIZE - 16, 15),
 		/* start of fastdata area in t0 */
-		MIPS32_LUI(8, UPPER16(MIPS32_PRACC_FASTDATA_AREA)),
-		MIPS32_ORI(8, 8, LOWER16(MIPS32_PRACC_FASTDATA_AREA)),
-		MIPS32_LW(9, 0, 8),						/* start addr in t1 */
-		MIPS32_LW(10, 0, 8),						/* end addr to t2 */
+		MIPS32_LUI(isa, 8, UPPER16(MIPS32_PRACC_FASTDATA_AREA)),
+		MIPS32_ORI(isa, 8, 8, LOWER16(MIPS32_PRACC_FASTDATA_AREA)),
+		MIPS32_LW(isa, 9, 0, 8),						/* start addr in t1 */
+		MIPS32_LW(isa, 10, 0, 8),						/* end addr to t2 */
 					/* loop: */
-		write_t ? MIPS32_LW(11, 0, 8) : MIPS32_LW(11, 0, 9),	/* from xfer area : from memory */
-		write_t ? MIPS32_SW(11, 0, 9) : MIPS32_SW(11, 0, 8),	/* to memory      : to xfer area */
+		write_t ? MIPS32_LW(isa, 11, 0, 8) : MIPS32_LW(isa, 11, 0, 9),	/* from xfer area : from memory */
+		write_t ? MIPS32_SW(isa, 11, 0, 9) : MIPS32_SW(isa, 11, 0, 8),	/* to memory      : to xfer area */
 
-		MIPS32_BNE(10, 9, NEG16(3)),			/* bne $t2,t1,loop */
-		MIPS32_ADDI(9, 9, 4),					/* addi t1,t1,4 */
+		MIPS32_BNE(isa, 10, 9, NEG16(3 << isa)),			/* bne $t2,t1,loop */
+		MIPS32_ADDI(isa, 9, 9, 4),					/* addi t1,t1,4 */
 
-		MIPS32_LW(8, MIPS32_FASTDATA_HANDLER_SIZE - 4, 15),
-		MIPS32_LW(9, MIPS32_FASTDATA_HANDLER_SIZE - 8, 15),
-		MIPS32_LW(10, MIPS32_FASTDATA_HANDLER_SIZE - 12, 15),
-		MIPS32_LW(11, MIPS32_FASTDATA_HANDLER_SIZE - 16, 15),
+		MIPS32_LW(isa, 8, MIPS32_FASTDATA_HANDLER_SIZE - 4, 15),
+		MIPS32_LW(isa, 9, MIPS32_FASTDATA_HANDLER_SIZE - 8, 15),
+		MIPS32_LW(isa, 10, MIPS32_FASTDATA_HANDLER_SIZE - 12, 15),
+		MIPS32_LW(isa, 11, MIPS32_FASTDATA_HANDLER_SIZE - 16, 15),
 
-		MIPS32_LUI(15, UPPER16(MIPS32_PRACC_TEXT)),
-		MIPS32_ORI(15, 15, LOWER16(MIPS32_PRACC_TEXT)),
-		MIPS32_JR(15),								/* jr start */
-		MIPS32_MFC0(15, 31, 0),						/* move COP0 DeSave to $15 */
+		MIPS32_LUI(isa, 15, UPPER16(MIPS32_PRACC_TEXT)),
+		MIPS32_ORI(isa, 15, 15, LOWER16(MIPS32_PRACC_TEXT) | isa),	/* isa bit for JR instr */
+		MIPS32_JR(isa, 15),								/* jr start */
+		MIPS32_MFC0(isa, 15, 31, 0),					/* move COP0 DeSave to $15 */
 	};
 
 	if (source->size < MIPS32_FASTDATA_HANDLER_SIZE)
 		return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
 
+	pracc_swap16_array(ejtag_info, handler_code, ARRAY_SIZE(handler_code));
 		/* write program into RAM */
 	if (write_t != ejtag_info->fast_access_save) {
 		mips32_pracc_write_mem(ejtag_info, source->address, 4, ARRAY_SIZE(handler_code), handler_code);
@@ -962,12 +965,14 @@ int mips32_pracc_fastdata_xfer(struct mips_ejtag *ejtag_info, struct working_are
 	LOG_DEBUG("%s using 0x%.8" TARGET_PRIxADDR " for write handler", __func__, source->address);
 
 	uint32_t jmp_code[] = {
-		MIPS32_LUI(15, UPPER16(source->address)),		/* load addr of jump in $15 */
-		MIPS32_ORI(15, 15, LOWER16(source->address)),
-		MIPS32_JR(15),					/* jump to ram program */
-		MIPS32_NOP,
+		MIPS32_LUI(isa, 15, UPPER16(source->address)),			/* load addr of jump in $15 */
+		MIPS32_ORI(isa, 15, 15, LOWER16(source->address) | isa),	/* isa bit for JR instr */
+		MIPS32_JR(isa, 15),						/* jump to ram program */
+		isa ? MIPS32_XORI(isa, 15, 15, 1) : MIPS32_NOP,	/* drop isa bit, needed for LW/SW instructions */
 	};
 
+	pracc_swap16_array(ejtag_info, jmp_code, ARRAY_SIZE(jmp_code));
+
 	/* execute jump code, with no address check */
 	for (unsigned i = 0; i < ARRAY_SIZE(jmp_code); i++) {
 		int retval = wait_for_pracc_rw(ejtag_info);