+// SPDX-License-Identifier: GPL-2.0-or-later
+
/***************************************************************************
* Copyright (C) 2008 by Spencer Oliver *
* spen@spen-soft.co.uk *
* 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 *
- * (at your option) any later version. *
- * *
- * This program is distributed in the hope that it will be useful, *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
- * GNU General Public License for more details. *
- * *
- * You should have received a copy of the GNU General Public License *
- * along with this program; if not, write to the *
- * Free Software Foundation, Inc., *
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
+
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "mips32.h"
#include "mips_ejtag.h"
+#include "mips32_dmaacc.h"
+#include "mips64.h"
+#include "mips64_pracc.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, uint32_t new_instr)
{
- struct jtag_tap *tap;
+ assert(ejtag_info->tap);
+ struct jtag_tap *tap = ejtag_info->tap;
- tap = ejtag_info->tap;
- if (tap == NULL)
- return ERROR_FAIL;
+ if (buf_get_u32(tap->cur_instr, 0, tap->ir_length) != new_instr) {
- 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;
+
+ uint8_t t[4] = { 0 };
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)
+int mips_ejtag_get_idcode(struct mips_ejtag *ejtag_info)
{
- struct scan_field field;
-
- jtag_set_end_state(TAP_IDLE);
-
- mips_ejtag_set_instr(ejtag_info, EJTAG_INST_IDCODE, NULL);
-
- field.tap = ejtag_info->tap;
- field.num_bits = 32;
- field.out_value = NULL;
- field.in_value = (void*)idcode;
+ mips_ejtag_set_instr(ejtag_info, EJTAG_INST_IDCODE);
- jtag_add_dr_scan(1, &field, jtag_get_end_state());
+ ejtag_info->idcode = 0;
+ return mips_ejtag_drscan_32(ejtag_info, &ejtag_info->idcode);
+}
- if (jtag_execute_queue() != ERROR_OK)
- {
- LOG_ERROR("register read failed");
- }
+static int mips_ejtag_get_impcode(struct mips_ejtag *ejtag_info)
+{
+ mips_ejtag_set_instr(ejtag_info, EJTAG_INST_IMPCODE);
- return ERROR_OK;
+ ejtag_info->impcode = 0;
+ return mips_ejtag_drscan_32(ejtag_info, &ejtag_info->impcode);
}
-int mips_ejtag_get_impcode(struct mips_ejtag *ejtag_info, uint32_t *impcode)
+void mips_ejtag_add_scan_96(struct mips_ejtag *ejtag_info, uint32_t ctrl, uint32_t data, uint8_t *in_scan_buf)
{
- struct scan_field field;
+ assert(ejtag_info->tap);
+ struct jtag_tap *tap = ejtag_info->tap;
- jtag_set_end_state(TAP_IDLE);
+ struct scan_field field;
+ uint8_t out_scan[12];
- mips_ejtag_set_instr(ejtag_info, EJTAG_INST_IMPCODE, NULL);
+ /* processor access "all" register 96 bit */
+ field.num_bits = 96;
- field.tap = ejtag_info->tap;
- field.num_bits = 32;
- field.out_value = NULL;
- field.in_value = (void*)impcode;
+ field.out_value = out_scan;
+ buf_set_u32(out_scan, 0, 32, ctrl);
+ buf_set_u32(out_scan + 4, 0, 32, data);
+ buf_set_u32(out_scan + 8, 0, 32, 0);
- jtag_add_dr_scan(1, &field, jtag_get_end_state());
+ field.in_value = in_scan_buf;
- if (jtag_execute_queue() != ERROR_OK)
- {
- LOG_ERROR("register read failed");
- }
+ jtag_add_dr_scan(tap, 1, &field, TAP_IDLE);
- return ERROR_OK;
+ keep_alive();
}
-int mips_ejtag_drscan_32(struct mips_ejtag *ejtag_info, uint32_t *data)
+int mips_ejtag_drscan_64(struct mips_ejtag *ejtag_info, uint64_t *data)
{
struct jtag_tap *tap;
tap = ejtag_info->tap;
- if (tap == NULL)
+ if (!tap)
return ERROR_FAIL;
struct scan_field field;
- uint8_t t[4], r[4];
+ uint8_t t[8] = { 0 }, r[8];
int retval;
- field.tap = tap;
- field.num_bits = 32;
+ field.num_bits = 64;
field.out_value = t;
- buf_set_u32(field.out_value, 0, field.num_bits, *data);
+ buf_set_u64(t, 0, field.num_bits, *data);
field.in_value = r;
- jtag_add_dr_scan(1, &field, jtag_get_end_state());
-
- if ((retval = jtag_execute_queue()) != ERROR_OK)
- {
+ jtag_add_dr_scan(tap, 1, &field, TAP_IDLE);
+ retval = jtag_execute_queue();
+ if (retval != ERROR_OK) {
LOG_ERROR("register read failed");
return retval;
}
- *data = buf_get_u32(field.in_value, 0, 32);
+ *data = buf_get_u64(field.in_value, 0, 64);
keep_alive();
return ERROR_OK;
}
-int mips_ejtag_step_enable(struct mips_ejtag *ejtag_info)
+static void mips_ejtag_drscan_32_queued(struct mips_ejtag *ejtag_info,
+ uint32_t data_out, uint8_t *data_in)
{
- 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 */
- };
+ assert(ejtag_info->tap);
+ struct jtag_tap *tap = ejtag_info->tap;
+
+ struct scan_field field;
+ field.num_bits = 32;
- mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, \
- 0, NULL, 0, NULL, 1);
+ uint8_t scan_out[4] = { 0 };
+ field.out_value = scan_out;
+ buf_set_u32(scan_out, 0, field.num_bits, data_out);
+ field.in_value = data_in;
+ jtag_add_dr_scan(tap, 1, &field, TAP_IDLE);
+
+ keep_alive();
+}
+
+int mips_ejtag_drscan_32(struct mips_ejtag *ejtag_info, uint32_t *data)
+{
+ uint8_t scan_in[4];
+ mips_ejtag_drscan_32_queued(ejtag_info, *data, scan_in);
+
+ int retval = jtag_execute_queue();
+ if (retval != ERROR_OK) {
+ LOG_ERROR("register read failed");
+ return retval;
+ }
+
+ *data = buf_get_u32(scan_in, 0, 32);
return ERROR_OK;
}
-int mips_ejtag_step_disable(struct mips_ejtag *ejtag_info)
+
+void mips_ejtag_drscan_32_out(struct mips_ejtag *ejtag_info, uint32_t data)
{
- 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_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
- 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_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 */
- };
+ mips_ejtag_drscan_32_queued(ejtag_info, data, NULL);
+}
+
+int mips_ejtag_drscan_8(struct mips_ejtag *ejtag_info, uint8_t *data)
+{
+ assert(ejtag_info->tap);
+ struct jtag_tap *tap = ejtag_info->tap;
+
+ struct scan_field field;
+ field.num_bits = 8;
+
+ field.out_value = data;
+ field.in_value = data;
- mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, \
- 0, NULL, 0, NULL, 1);
+ jtag_add_dr_scan(tap, 1, &field, TAP_IDLE);
+ int retval = jtag_execute_queue();
+ if (retval != ERROR_OK) {
+ LOG_ERROR("register read failed");
+ return retval;
+ }
return ERROR_OK;
}
+void mips_ejtag_drscan_8_out(struct mips_ejtag *ejtag_info, uint8_t data)
+{
+ assert(ejtag_info->tap);
+ struct jtag_tap *tap = ejtag_info->tap;
+
+ 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);
+}
+
+/* Set (to enable) or clear (to disable stepping) the SSt bit (bit 8) in Cp0 Debug reg (reg 23, sel 0) */
int mips_ejtag_config_step(struct mips_ejtag *ejtag_info, int enable_step)
{
- if (enable_step)
- return mips_ejtag_step_enable(ejtag_info);
- return mips_ejtag_step_disable(ejtag_info);
+ struct pracc_queue_info ctx = {.ejtag_info = ejtag_info};
+ pracc_queue_init(&ctx);
+
+ pracc_add(&ctx, 0, MIPS32_MFC0(ctx.isa, 8, 23, 0)); /* move COP0 Debug to $8 */
+ pracc_add(&ctx, 0, MIPS32_ORI(ctx.isa, 8, 8, 0x0100)); /* set SSt bit in debug reg */
+ if (!enable_step)
+ pracc_add(&ctx, 0, MIPS32_XORI(ctx.isa, 8, 8, 0x0100)); /* clear SSt bit in debug reg */
+
+ pracc_add(&ctx, 0, MIPS32_MTC0(ctx.isa, 8, 23, 0)); /* move $8 to COP0 Debug */
+ 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, NULL, 1);
+ pracc_queue_free(&ctx);
+ return ctx.retval;
+}
+
+/*
+ * Disable memory protection for 0xFF20.0000–0xFF3F.FFFF
+ * It is needed by EJTAG 1.5-2.0, especially for BMIPS CPUs
+ * For example bcm7401 and others. At leas on some
+ * CPUs, DebugMode wont start if this bit is not removed.
+ */
+static int disable_dcr_mp(struct mips_ejtag *ejtag_info)
+{
+ uint32_t dcr;
+ int retval;
+
+ retval = mips32_dmaacc_read_mem(ejtag_info, EJTAG_DCR, 4, 1, &dcr);
+ if (retval != ERROR_OK)
+ goto error;
+
+ dcr &= ~EJTAG_DCR_MP;
+ retval = mips32_dmaacc_write_mem(ejtag_info, EJTAG_DCR, 4, 1, &dcr);
+ if (retval != ERROR_OK)
+ goto error;
+ return ERROR_OK;
+error:
+ LOG_ERROR("Failed to remove DCR MPbit!");
+ return retval;
}
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);
+
+ if (ejtag_info->ejtag_version == EJTAG_VERSION_20) {
+ if (disable_dcr_mp(ejtag_info) != ERROR_OK)
+ goto error;
+ }
/* set debug break bit */
ejtag_ctrl = ejtag_info->ejtag_ctrl | EJTAG_CTRL_JTAGBRK;
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!");
+ goto error;
return ERROR_OK;
+error:
+ LOG_ERROR("Failed to enter Debug Mode!");
+ return ERROR_FAIL;
}
int mips_ejtag_exit_debug(struct mips_ejtag *ejtag_info)
{
- uint32_t inst;
- inst = MIPS32_DRET;
+ struct pa_list pracc_list = {.instr = MIPS32_DRET(ejtag_info->isa), .addr = 0};
+ struct pracc_queue_info ctx = {.max_code = 1, .pracc_list = &pracc_list, .code_count = 1, .store_count = 0};
/* execute our dret instruction */
- mips32_pracc_exec(ejtag_info, 1, &inst, 0, NULL, 0, NULL, 0);
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, NULL, 0); /* shift out instr, omit last check */
- return ERROR_OK;
+ /* pic32mx workaround, false pending at low core clock */
+ jtag_add_sleep(1000);
+ return ctx.retval;
}
-int mips_ejtag_read_debug(struct mips_ejtag *ejtag_info, uint32_t* debug_reg)
+/* mips_ejtag_init_mmr - assign Memory-Mapped Registers depending
+ * on EJTAG version.
+ */
+static void mips_ejtag_init_mmr(struct mips_ejtag *ejtag_info)
{
- /* read ejtag ECR */
- 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_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_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 */
- };
+ if (ejtag_info->ejtag_version == EJTAG_VERSION_20) {
+ ejtag_info->ejtag_ibs_addr = EJTAG_V20_IBS;
+ ejtag_info->ejtag_iba0_addr = EJTAG_V20_IBA0;
+ ejtag_info->ejtag_ibc_offs = EJTAG_V20_IBC_OFFS;
+ ejtag_info->ejtag_ibm_offs = EJTAG_V20_IBM_OFFS;
+
+ ejtag_info->ejtag_dbs_addr = EJTAG_V20_DBS;
+ ejtag_info->ejtag_dba0_addr = EJTAG_V20_DBA0;
+ ejtag_info->ejtag_dbc_offs = EJTAG_V20_DBC_OFFS;
+ ejtag_info->ejtag_dbm_offs = EJTAG_V20_DBM_OFFS;
+ ejtag_info->ejtag_dbv_offs = EJTAG_V20_DBV_OFFS;
+
+ ejtag_info->ejtag_iba_step_size = EJTAG_V20_IBAN_STEP;
+ ejtag_info->ejtag_dba_step_size = EJTAG_V20_DBAN_STEP;
+ } else {
+ ejtag_info->ejtag_ibs_addr = EJTAG_V25_IBS;
+ ejtag_info->ejtag_iba0_addr = EJTAG_V25_IBA0;
+ ejtag_info->ejtag_ibm_offs = EJTAG_V25_IBM_OFFS;
+ ejtag_info->ejtag_ibasid_offs = EJTAG_V25_IBASID_OFFS;
+ ejtag_info->ejtag_ibc_offs = EJTAG_V25_IBC_OFFS;
+
+ ejtag_info->ejtag_dbs_addr = EJTAG_V25_DBS;
+ ejtag_info->ejtag_dba0_addr = EJTAG_V25_DBA0;
+ ejtag_info->ejtag_dbm_offs = EJTAG_V25_DBM_OFFS;
+ ejtag_info->ejtag_dbasid_offs = EJTAG_V25_DBASID_OFFS;
+ ejtag_info->ejtag_dbc_offs = EJTAG_V25_DBC_OFFS;
+ ejtag_info->ejtag_dbv_offs = EJTAG_V25_DBV_OFFS;
+
+ ejtag_info->ejtag_iba_step_size = EJTAG_V25_IBAN_STEP;
+ ejtag_info->ejtag_dba_step_size = EJTAG_V25_DBAN_STEP;
+ }
+}
- mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, \
- 0, NULL, 1, debug_reg, 1);
+static void ejtag_v20_print_imp(struct mips_ejtag *ejtag_info)
+{
+ LOG_DEBUG("EJTAG v2.0: features:%s%s%s%s%s%s%s%s",
+ EJTAG_IMP_HAS(EJTAG_V20_IMP_SDBBP) ? " SDBBP_SPECIAL2" : " SDBBP",
+ EJTAG_IMP_HAS(EJTAG_V20_IMP_EADDR_NO32BIT) ? " EADDR>32bit" : " EADDR=32bit",
+ EJTAG_IMP_HAS(EJTAG_V20_IMP_COMPLEX_BREAK) ? " COMPLEX_BREAK" : "",
+ EJTAG_IMP_HAS(EJTAG_V20_IMP_DCACHE_COH) ? " DCACHE_COH" : " DCACHE_NOT_COH",
+ EJTAG_IMP_HAS(EJTAG_V20_IMP_ICACHE_COH) ? " ICACHE_COH" : " ICACHE_NOT_COH",
+ EJTAG_IMP_HAS(EJTAG_V20_IMP_NOPB) ? " noPB" : " PB",
+ EJTAG_IMP_HAS(EJTAG_V20_IMP_NODB) ? " noDB" : " DB",
+ EJTAG_IMP_HAS(EJTAG_V20_IMP_NOIB) ? " noIB" : " IB");
+ LOG_DEBUG("EJTAG v2.0: Break Channels: %" PRIu8,
+ (uint8_t)((ejtag_info->impcode >> EJTAG_V20_IMP_BCHANNELS_SHIFT) &
+ EJTAG_V20_IMP_BCHANNELS_MASK));
+}
- return ERROR_OK;
+static void ejtag_v26_print_imp(struct mips_ejtag *ejtag_info)
+{
+ LOG_DEBUG("EJTAG v2.6: features:%s%s",
+ EJTAG_IMP_HAS(EJTAG_V26_IMP_R3K) ? " R3k" : " R4k",
+ EJTAG_IMP_HAS(EJTAG_V26_IMP_DINT) ? " DINT" : "");
}
-int mips_ejtag_init(struct mips_ejtag *ejtag_info)
+static void ejtag_main_print_imp(struct mips_ejtag *ejtag_info)
{
- uint32_t ejtag_version;
+ LOG_DEBUG("EJTAG main: features:%s%s%s%s%s",
+ EJTAG_IMP_HAS(EJTAG_IMP_ASID8) ? " ASID_8" : "",
+ EJTAG_IMP_HAS(EJTAG_IMP_ASID6) ? " ASID_6" : "",
+ EJTAG_IMP_HAS(EJTAG_IMP_MIPS16) ? " MIPS16" : "",
+ EJTAG_IMP_HAS(EJTAG_IMP_NODMA) ? " noDMA" : " DMA",
+ EJTAG_IMP_HAS(EJTAG_IMP_MIPS64) ? " MIPS64" : " MIPS32");
+
+ switch (ejtag_info->ejtag_version) {
+ case EJTAG_VERSION_20:
+ ejtag_v20_print_imp(ejtag_info);
+ break;
+ case EJTAG_VERSION_25:
+ case EJTAG_VERSION_26:
+ case EJTAG_VERSION_31:
+ case EJTAG_VERSION_41:
+ case EJTAG_VERSION_51:
+ ejtag_v26_print_imp(ejtag_info);
+ break;
+ default:
+ break;
+ }
+}
- mips_ejtag_get_impcode(ejtag_info, &ejtag_info->impcode);
- LOG_DEBUG("impcode: 0x%8.8" PRIx32 "", ejtag_info->impcode);
+int mips_ejtag_init(struct mips_ejtag *ejtag_info)
+{
+ int retval = mips_ejtag_get_impcode(ejtag_info);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("impcode read failed");
+ return retval;
+ }
/* get ejtag version */
- ejtag_version = ((ejtag_info->impcode >> 29) & 0x07);
+ ejtag_info->ejtag_version = ((ejtag_info->impcode >> 29) & 0x07);
- switch (ejtag_version)
- {
- case 0:
+ switch (ejtag_info->ejtag_version) {
+ case EJTAG_VERSION_20:
LOG_DEBUG("EJTAG: Version 1 or 2.0 Detected");
break;
- case 1:
+ case EJTAG_VERSION_25:
LOG_DEBUG("EJTAG: Version 2.5 Detected");
break;
- case 2:
+ case EJTAG_VERSION_26:
LOG_DEBUG("EJTAG: Version 2.6 Detected");
break;
- case 3:
+ case EJTAG_VERSION_31:
LOG_DEBUG("EJTAG: Version 3.1 Detected");
break;
+ case EJTAG_VERSION_41:
+ LOG_DEBUG("EJTAG: Version 4.1 Detected");
+ break;
+ case EJTAG_VERSION_51:
+ LOG_DEBUG("EJTAG: Version 5.1 Detected");
+ break;
default:
LOG_DEBUG("EJTAG: Unknown Version Detected");
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)
- 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_main_print_imp(ejtag_info);
+
+ if ((ejtag_info->impcode & EJTAG_IMP_NODMA) == 0) {
+ LOG_DEBUG("EJTAG: DMA Access Mode detected. Disabling to "
+ "workaround current broken code.");
+ ejtag_info->impcode |= EJTAG_IMP_NODMA;
+ }
+
+ ejtag_info->ejtag_ctrl = EJTAG_CTRL_PRACC | EJTAG_CTRL_PROBEN;
+
+ if (ejtag_info->ejtag_version != EJTAG_VERSION_20)
+ ejtag_info->ejtag_ctrl |= EJTAG_CTRL_ROCC | EJTAG_CTRL_SETDEV;
+
+ ejtag_info->fast_access_save = -1;
+
+ mips_ejtag_init_mmr(ejtag_info);
return ERROR_OK;
}
-int mips_ejtag_fastdata_scan(struct mips_ejtag *ejtag_info, int write, uint32_t *data)
+int mips_ejtag_fastdata_scan(struct mips_ejtag *ejtag_info, int write_t, uint32_t *data)
{
- struct jtag_tap *tap;
- tap = ejtag_info->tap;
-
- if (tap == NULL)
- return ERROR_FAIL;
+ assert(ejtag_info->tap);
+ struct jtag_tap *tap = ejtag_info->tap;
struct scan_field fields[2];
- uint8_t spracc = 0;
- uint8_t t[4] = {0, 0, 0, 0};
/* fastdata 1-bit register */
- fields[0].tap = tap;
fields[0].num_bits = 1;
+
+ uint8_t spracc = 0;
fields[0].out_value = &spracc;
fields[0].in_value = NULL;
/* processor access data register 32 bit */
- fields[1].tap = tap;
fields[1].num_bits = 32;
+
+ uint8_t t[4] = {0, 0, 0, 0};
fields[1].out_value = t;
- if (write)
- {
+ if (write_t) {
fields[1].in_value = NULL;
buf_set_u32(t, 0, 32, *data);
- }
- else
- {
+ } else
fields[1].in_value = (uint8_t *) data;
- }
- jtag_add_dr_scan(2, fields, jtag_get_end_state());
+ 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;
+}
+
+int mips64_ejtag_config_step(struct mips_ejtag *ejtag_info, bool enable_step)
+{
+ const uint32_t code_enable[] = {
+ MIPS64_MTC0(1, 31, 0), /* move $1 to COP0 DeSave */
+ MIPS64_MFC0(1, 23, 0), /* move COP0 Debug to $1 */
+ MIPS64_ORI(1, 1, 0x0100), /* set SSt bit in debug reg */
+ MIPS64_MTC0(1, 23, 0), /* move $1 to COP0 Debug */
+ MIPS64_B(NEG16(5)),
+ MIPS64_MFC0(1, 31, 0), /* move COP0 DeSave to $1 */
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ };
+
+ const uint32_t code_disable[] = {
+ MIPS64_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
+ MIPS64_LUI(15, UPPER16(MIPS64_PRACC_STACK)), /* $15 = MIPS64_PRACC_STACK */
+ MIPS64_ORI(15, 15, LOWER16(MIPS64_PRACC_STACK)),
+ MIPS64_SD(1, 0, 15), /* sw $1,($15) */
+ MIPS64_SD(2, 0, 15), /* sw $2,($15) */
+ MIPS64_MFC0(1, 23, 0), /* move COP0 Debug to $1 */
+ MIPS64_LUI(2, 0xFFFF), /* $2 = 0xfffffeff */
+ MIPS64_ORI(2, 2, 0xFEFF),
+ MIPS64_AND(1, 1, 2),
+ MIPS64_MTC0(1, 23, 0), /* move $1 to COP0 Debug */
+ MIPS64_LD(2, 0, 15),
+ MIPS64_LD(1, 0, 15),
+ MIPS64_SYNC,
+ MIPS64_B(NEG16(14)),
+ MIPS64_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ };
+ const uint32_t *code = enable_step ? code_enable : code_disable;
+ unsigned code_len = enable_step ? ARRAY_SIZE(code_enable) :
+ ARRAY_SIZE(code_disable);
+
+ return mips64_pracc_exec(ejtag_info,
+ code_len, code, 0, NULL, 0, NULL);
+}
+
+int mips64_ejtag_exit_debug(struct mips_ejtag *ejtag_info)
+{
+ const uint32_t code[] = {
+ MIPS64_DRET,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ MIPS64_NOP,
+ };
+ LOG_DEBUG("enter mips64_pracc_exec");
+ return mips64_pracc_exec(ejtag_info,
+ ARRAY_SIZE(code), code, 0, NULL, 0, NULL);
+}
+
+int mips64_ejtag_fastdata_scan(struct mips_ejtag *ejtag_info, bool write_t, uint64_t *data)
+{
+ struct jtag_tap *tap;
+
+ tap = ejtag_info->tap;
+ assert(tap);
+
+ struct scan_field fields[2];
+ uint8_t spracc = 0;
+ uint8_t t[8] = {0, 0, 0, 0, 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 64 bit */
+ fields[1].num_bits = 64;
+ fields[1].out_value = t;
+
+ if (write_t) {
+ fields[1].in_value = NULL;
+ buf_set_u64(t, 0, 64, *data);
+ } else
+ fields[1].in_value = (uint8_t *) data;
+
+ jtag_add_dr_scan(tap, 2, fields, TAP_IDLE);
+
+ if (!write_t && data)
+ jtag_add_callback(mips_le_to_h_u64,
+ (jtag_callback_data_t) data);
keep_alive();
return ERROR_OK;
projects / fw / openocd / blobdiff