• Change Log
• Preface
• 1Introduction
  • 1.1Terminology
    • 1.1.1Context
    • 1.1.2Versions
  • 1.2About This Document
    • 1.2.1Structure
    • 1.2.2Register Definition Format
  • 1.3Background
  • 1.4Supported Features
• 2Reading Order
  • • 2.0.1Halt/Resume
    • 2.0.2Abstract Register Access
    • 2.0.3Program Buffer
    • 2.0.4JTAG Debug Transport Module
    • 2.0.5System Bus Master
    • 2.0.6Reset
    • 2.0.7Security
    • 2.0.8Triggers
    • 2.0.9Serial Ports
• 3System Overview
• 4Debug Module (DM)
  • 4.1Debug Module Interface (DMI)
  • 4.2Reset Control
  • 4.3Selecting Harts
    • 4.3.1Selecting a Single Hart
    • 4.3.2Selecting Multiple Harts
  • 4.4Hart States
  • 4.5Run Control
  • 4.6Abstract Commands
    • 4.6.1Abstract Command Listing
  • 4.7Program Buffer
  • 4.8Overview of States
  • 4.9System Bus Access
  • 4.10Minimally Intrusive Debugging
  • 4.11Security
  • 4.12Debug Module Registers
• 5RISC-V Debug
  • 5.1Debug Mode
  • 5.2Load-Reserved/Store-Conditional Instructions
  • 5.3Wait for Interrupt Instruction
  • 5.4Single Step
  • 5.5Reset
  • 5.7XLEN
  • 5.8Core Debug Registers
  • 5.9Virtual Debug Registers
• 6Trigger Module
  • 6.1Native M-Mode Triggers
  • 6.2Trigger Registers
• 7Debug Transport Module (DTM)
• 8JTAG Debug Transport Module
  • 8.1JTAG Background
  • 8.2JTAG DTM Registers
  • 8.3Recommended JTAG Connector
• Hardware Implementations
  • Abstract Command Based
  • Execution Based
• Debugger Implementation
  • Debug Module Interface Access
  • Checking for Halted Harts
  • Halting
  • Running
  • Single Step
  • Accessing Registers
    • Using Abstract Command
    • Using Program Buffer
  • Reading Memory
    • Using System Bus Access
    • Using Program Buffer
    • Using Abstract Memory Access
  • Writing Memory
    • Using System Bus Access
    • Using Program Buffer
    • Using Abstract Memory Access
  • Triggers
  • Handling Exceptions
  • Quick Access
  • IDCODE (at 0x01)
  • DTM Control and Status (dtmcs, at 0x10)
  • Debug Module Interface Access (dmi, at 0x11)
  • BYPASS (at 0x1f)
  • Debug Control and Status (dcsr, at 0x7b0)
  • Debug PC (dpc, at 0x7b1)
  • Debug Scratch Register 0 (dscratch0, at 0x7b2)
  • Debug Scratch Register 1 (dscratch1, at 0x7b3)
  • Trigger Select (tselect, at 0x7a0)
  • Trigger Data 1 (tdata1, at 0x7a1)
  • Trigger Data 2 (tdata2, at 0x7a2)
  • Trigger Data 3 (tdata3, at 0x7a3)
  • Trigger Info (tinfo, at 0x7a4)
  • Trigger Control (tcontrol, at 0x7a5)
  • Machine Context (mcontext, at 0x7a8)
  • Supervisor Context (scontext, at 0x7aa)
  • Match Control (mcontrol, at 0x7a1)
  • Instruction Count (icount, at 0x7a1)
  • Interrupt Trigger (itrigger, at 0x7a1)
  • Exception Trigger (etrigger, at 0x7a1)
  • Trigger Extra (RV32) (textra32, at 0x7a3)
  • Trigger Extra (RV64) (textra64, at 0x7a3)
  • Debug Module Status (dmstatus, at 0x11)
  • Debug Module Control (dmcontrol, at 0x10)
  • Hart Info (hartinfo, at 0x12)
  • Hart Array Window Select (hawindowsel, at 0x14)
  • Hart Array Window (hawindow, at 0x15)
  • Abstract Control and Status (abstractcs, at 0x16)
  • Abstract Command (command, at 0x17)
  • Abstract Command Autoexec (abstractauto, at 0x18)
  • Configuration String Pointer 0 (confstrptr0, at 0x19)
  • Next Debug Module (nextdm, at 0x1d)
  • Abstract Data 0 (data0, at 0x04)
  • Program Buffer 0 (progbuf0, at 0x20)
  • Authentication Data (authdata, at 0x30)
  • Halt Summary 0 (haltsum0, at 0x40)
  • Halt Summary 1 (haltsum1, at 0x13)
  • Halt Summary 2 (haltsum2, at 0x34)
  • Halt Summary 3 (haltsum3, at 0x35)
  • System Bus Access Control and Status (sbcs, at 0x38)
  • System Bus Address 31:0 (sbaddress0, at 0x39)
  • System Bus Address 63:32 (sbaddress1, at 0x3a)
  • System Bus Address 95:64 (sbaddress2, at 0x3b)
  • System Bus Address 127:96 (sbaddress3, at 0x37)
  • System Bus Data 31:0 (sbdata0, at 0x3c)
  • System Bus Data 63:32 (sbdata1, at 0x3d)
  • System Bus Data 95:64 (sbdata2, at 0x3e)
  • System Bus Data 127:96 (sbdata3, at 0x3f)
    • Long Name (shortname, at 0x123)
    • Access Register
    • Quick Access
    • Access Memory
  • Privilege Level (priv, at virtual)
  • Serial Control and Status (sercs, at 0x34)
  • Serial TX Data (sertx, at 0x35)
  • Serial RX Data (serrx, at 0x36)