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diff --git a/src/target/nds32_edm.h b/src/target/nds32_edm.h
new file mode 100644
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--- /dev/null
+++ b/src/target/nds32_edm.h
@@ -0,0 +1,116 @@
+/***************************************************************************
+ *   Copyright (C) 2013 by Andes Technology                                *
+ *   Hsiangkai Wang <hkwang@andestech.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.,                                       *
+ *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.           *
+ ***************************************************************************/
+#ifndef __NDS32_EDM_H__
+#define __NDS32_EDM_H__
+
+/**
+ * @file
+ * This is the interface to the Embedded Debug Module for Andes cores.
+ */
+
+/* EDM misc registers */
+enum nds_edm_misc_reg {
+	NDS_EDM_MISC_DIMIR = 0x0,
+	NDS_EDM_MISC_SBAR,
+	NDS_EDM_MISC_EDM_CMDR,
+	NDS_EDM_MISC_DBGER,
+	NDS_EDM_MISC_ACC_CTL,
+	NDS_EDM_MISC_EDM_PROBE,
+	NDS_EDM_MISC_GEN_PORT0,
+	NDS_EDM_MISC_GEN_PORT1,
+};
+
+/* EDM system registers */
+enum nds_edm_system_reg {
+	NDS_EDM_SR_BPC0 = 0x00,
+	NDS_EDM_SR_BPC1,
+	NDS_EDM_SR_BPC2,
+	NDS_EDM_SR_BPC3,
+	NDS_EDM_SR_BPC4,
+	NDS_EDM_SR_BPC5,
+	NDS_EDM_SR_BPC6,
+	NDS_EDM_SR_BPC7,
+	NDS_EDM_SR_BPA0 = 0x08,
+	NDS_EDM_SR_BPA1,
+	NDS_EDM_SR_BPA2,
+	NDS_EDM_SR_BPA3,
+	NDS_EDM_SR_BPA4,
+	NDS_EDM_SR_BPA5,
+	NDS_EDM_SR_BPA6,
+	NDS_EDM_SR_BPA7,
+	NDS_EDM_SR_BPAM0 = 0x10,
+	NDS_EDM_SR_BPAM1,
+	NDS_EDM_SR_BPAM2,
+	NDS_EDM_SR_BPAM3,
+	NDS_EDM_SR_BPAM4,
+	NDS_EDM_SR_BPAM5,
+	NDS_EDM_SR_BPAM6,
+	NDS_EDM_SR_BPAM7,
+	NDS_EDM_SR_BPV0 = 0x18,
+	NDS_EDM_SR_BPV1,
+	NDS_EDM_SR_BPV2,
+	NDS_EDM_SR_BPV3,
+	NDS_EDM_SR_BPV4,
+	NDS_EDM_SR_BPV5,
+	NDS_EDM_SR_BPV6,
+	NDS_EDM_SR_BPV7,
+	NDS_EDM_SR_BPCID0 = 0x20,
+	NDS_EDM_SR_BPCID1,
+	NDS_EDM_SR_BPCID2,
+	NDS_EDM_SR_BPCID3,
+	NDS_EDM_SR_BPCID4,
+	NDS_EDM_SR_BPCID5,
+	NDS_EDM_SR_BPCID6,
+	NDS_EDM_SR_BPCID7,
+	NDS_EDM_SR_EDM_CFG = 0x28,
+	NDS_EDM_SR_EDMSW = 0x30,
+	NDS_EDM_SR_EDM_CTL = 0x38,
+	NDS_EDM_SR_EDM_DTR = 0x40,
+	NDS_EDM_SR_BPMTV = 0x48,
+	NDS_EDM_SR_DIMBR = 0x50,
+	NDS_EDM_SR_TECR0 = 0x70,
+	NDS_EDM_SR_TECR1 = 0x71,
+};
+
+enum nds_memory_access {
+	NDS_MEMORY_ACC_BUS = 0,
+	NDS_MEMORY_ACC_CPU,
+};
+
+enum nds_memory_select {
+	NDS_MEMORY_SELECT_AUTO = 0,
+	NDS_MEMORY_SELECT_MEM = 1,
+	NDS_MEMORY_SELECT_ILM = 2,
+	NDS_MEMORY_SELECT_DLM = 3,
+};
+
+#define NDS_DBGER_DEX		(0x1)
+#define NDS_DBGER_DPED		(0x2)
+#define NDS_DBGER_CRST		(0x4)
+#define NDS_DBGER_AT_MAX	(0x8)
+#define NDS_DBGER_ILL_SEC_ACC	(0x10)
+#define NDS_DBGER_ALL_SUPRS_EX	(0x40000000)
+#define NDS_DBGER_RESACC	(0x80000000)
+#define NDS_DBGER_CLEAR_ALL	(0x1F)
+
+#define NDS_EDMSW_WDV		(1 << 0)
+#define NDS_EDMSW_RDV		(1 << 1)
+
+#endif /* __NDS32_EDM_H__ */