riscv/rocket-chip
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Merge pull request #675 from ucb-bar/debug_no_preexec

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More Debug Updates to bring in line with spec
This commit is contained in:
Yunsup Lee 2017-04-18 03:10:27 +09:00 committed by GitHub
commit 71eaed7d60
7 changed files with 55 additions and 111 deletions
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2
chisel3

@ -1 +1 @@
Subproject commit 00796dfce1ec3eba739467571cdfc52df2aa62de
Subproject commit bb12fe7f61d12f51cf5d56b2a66aca0a1234abb3

14
regression/Makefile
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@ -216,19 +216,19 @@ stamps/%/emulator-torture-$(TORTURE_CONFIG).stamp: stamps/%/emulator-debug.stamp
# Targets for JTAG DTM full-chain simulation
#OPENOCD_HEAD ?= riscv
OPENOCD_INSTALL ?= $(abspath $(TOP))/openocd-install
#OPENOCD_VERSION = $(shell git ls-remote http://github.com/sifive/openocd.git $(OPENOCD_HEAD) | awk '{print $$1}')
OPENOCD_VERSION = 02c83d1ef348ce237b72e157fa6df6c4e791feb3
OPENOCD_INSTALL ?= $(abspath $(TOP))/riscv-openocd-install
#OPENOCD_VERSION = $(shell git ls-remote git@github.com/riscv/riscv-openocd.git $(OPENOCD_HEAD) | awk '{print $$1}')
OPENOCD_VERSION = 0e66b07550de9076620e45d1f90e38ac6ef8f9d1
OPENOCD_DIR = $(OPENOCD_INSTALL)_$(OPENOCD_VERSION)/
$(OPENOCD_DIR)/bin/openocd:
rm -rf openocd
git clone http://github.com/sifive/openocd.git
cd openocd ; \
rm -rf riscv-openocd
git clone git@github.com:riscv/riscv-openocd.git
cd riscv-openocd ; \
git checkout $(OPENOCD_VERSION) ; \
./bootstrap ; \
./configure --enable-jtag-vpi --prefix=$(OPENOCD_INSTALL)_$(OPENOCD_VERSION) ; \
./configure --enable-jtag-vpi --prefix=$(OPENOCD_INSTALL)_$(OPENOCD_VERSION) --disable-werror; \
make ; \
make install

2
riscv-tools

@ -1 +1 @@
Subproject commit cd8bc4798c38ba11118492474e96baf717c7af36
Subproject commit 1bf2c200443a20291b4f35d565c54eb96dcdf40d

2
src/main/scala/rocket/CSR.scala
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@ -503,7 +503,7 @@ class CSRFile(perfEventSets: EventSets = new EventSets(Seq()))(implicit p: Param
when (pending_interrupts.orR || exception) { reg_wfi := false }
assert(!reg_wfi || io.retire === UInt(0))
when (io.retire(0)) { reg_singleStepped := true }
when (io.retire(0) || exception) { reg_singleStepped := true }
when (!io.singleStep) { reg_singleStepped := false }
assert(!io.singleStep || io.retire <= UInt(1))
assert(!reg_singleStepped || io.retire === UInt(0))

4
src/main/scala/rocket/PMP.scala
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@ -80,7 +80,7 @@ class PMP(implicit p: Parameters) extends PMPReg {
prev.lowerBoundMatch(x, lgSize, lgMaxSize) && upperBoundMatch(x, lgMaxSize)
private def pow2Homogeneous(x: UInt, pgLevel: UInt) = {
val maskHomogeneous = pgLevelMap { idxBits => mask(idxBits - 1) } (pgLevel)
val maskHomogeneous = pgLevelMap { idxBits => if (idxBits > paddrBits) false.B else mask(idxBits - 1) } (pgLevel)
maskHomogeneous || (pgLevelMap { idxBits => ((x ^ comparand) >> idxBits) =/= 0 } (pgLevel))
}
@ -92,7 +92,7 @@ class PMP(implicit p: Parameters) extends PMPReg {
val beginsAfterLower = !(x < prev.comparand)
val beginsAfterUpper = !(x < comparand)
val pgMask = pgLevelMap { idxBits => ((BigInt(1) << paddrBits) - (BigInt(1) << idxBits)).U } (pgLevel)
val pgMask = pgLevelMap { idxBits => (((BigInt(1) << paddrBits) - (BigInt(1) << idxBits)) max 0).U } (pgLevel)
val endsBeforeLower = (x & pgMask) < (prev.comparand & pgMask)
val endsBeforeUpper = (x & pgMask) < (comparand & pgMask)

127
src/main/scala/uncore/devices/debug/Debug.scala
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@ -52,19 +52,24 @@ object DsbRegAddrs{
def RESUMING = 0x108
def EXCEPTION = 0x10C
def FLAGS = 0x400
def ROMBASE = 0x800
def RESUME = 0x804
def WHERETO = 0x300
def ABSTRACT = 0x340 - 8
def PROGBUF = 0x340
// This needs to be aligned for up to lq/sq
// This shows up in HartInfo
// This shows up in HartInfo, and needs to be aligned
// to enable up to LQ/SQ instructions.
def DATA = 0x380
//Not implemented: Serial.
// We want DATA to immediately follow PROGBUF so that we can
// use them interchangeably.
def PROGBUF(cfg:DebugModuleConfig) = {DATA - (cfg.nProgramBufferWords * 4)}
// We want abstract to be immediately before PROGBUF
// because we auto-generate 2 instructions.
def ABSTRACT(cfg:DebugModuleConfig) = PROGBUF(cfg) - 8
def FLAGS = 0x400
def ROMBASE = 0x800
}
@ -226,8 +231,8 @@ class DebugCtrlBundle (nComponents: Int)(implicit val p: Parameters) extends Par
* provide the default MTVEC since it is mapped
* to address 0x0.
*
* DebugModule is responsible for control registers and RAM. The Debug ROM is in a
* seperate module. It runs partially off of the dmiClk (e.g. TCK) and
* DebugModule is responsible for control registers and RAM, and
* Debug ROM. It runs partially off of the dmiClk (e.g. TCK) and
* the TL clock. Therefore, it is divided into "Outer" portion (running
* of off dmiClock and dmiReset) and "Inner" (running off tlClock and tlReset).
* This allows DMCONTROL.haltreq, hartsel, dmactive, and ndreset to be
@ -354,8 +359,7 @@ class TLDebugModuleOuter(device: Device)(implicit p: Parameters) extends LazyMod
io.debugInterrupts(component)(0) := debugIntRegs(component)
}
// Halt request registers are written by write to DMCONTROL.haltreq
// and cleared by writes to DMCONTROL.resumereq.
// Halt request registers are set & cleared by writes to DMCONTROL.haltreq
// resumereq also causes the core to execute a 'dret',
// so resumereq is passed through to Inner.
// hartsel must also be used by the DebugModule state machine,
@ -367,11 +371,8 @@ class TLDebugModuleOuter(device: Device)(implicit p: Parameters) extends LazyMod
when (~dmactive) {
debugIntNxt(component) := false.B
}. otherwise {
when (DMCONTROLWrEn) {
when (DMCONTROLWrData.hartsel === component.U) {
debugIntNxt(component) := (debugIntRegs(component) | DMCONTROLWrData.haltreq) &
~(DMCONTROLWrData.resumereq)
}
when (DMCONTROLWrEn && DMCONTROLWrData.hartsel === component.U) {
debugIntNxt(component) := DMCONTROLWrData.haltreq
}
}
}
@ -597,8 +598,7 @@ class TLDebugModuleInner(device: Device, getNComponents: () => Int)(implicit p:
}.elsewhen (errorHaltResume) {
ABSTRACTCSReg.cmderr := DebugAbstractCommandError.ErrHaltResume.id.U
}.otherwise {
//TODO: Should be write-1-to-clear & ~ABSTRACTCSWrData.cmderr
when (ABSTRACTCSWrEn /* && ABSTRACTCSWrData.cmderr === 0.U*/){
when (ABSTRACTCSWrEn){
ABSTRACTCSReg.cmderr := ABSTRACTCSReg.cmderr & ~(ABSTRACTCSWrData.cmderr);
}
}
@ -741,35 +741,15 @@ class TLDebugModuleInner(device: Device, getNComponents: () => Int)(implicit p:
// "Variable" ROM Generation
//--------------------------------------------------------------
val goProgramBuffer = Wire(init = false.B)
val goAbstract = Wire(init = false.B)
val whereToReg = Reg(UInt(32.W))
val jalProgBuf = Wire(init = (new GeneratedUJ()).fromBits(rocket.Instructions.JAL.value.U))
jalProgBuf.setImm(PROGBUF - WHERETO)
jalProgBuf.rd := 0.U
val jalAbstract = Wire(init = (new GeneratedUJ()).fromBits(rocket.Instructions.JAL.value.U))
jalAbstract.setImm(ABSTRACT - WHERETO)
jalProgBuf.rd := 0.U
when (~io.dmactive) {
whereToReg := 0.U
}.otherwise{
when (goProgramBuffer) {
whereToReg := jalProgBuf.asUInt()
}.elsewhen (goAbstract) {
whereToReg := jalAbstract.asUInt()
}
}
val goReg = Reg(Bool())
val goAbstract = Wire(init = false.B)
val jalAbstract = Wire(init = (new GeneratedUJ()).fromBits(rocket.Instructions.JAL.value.U))
jalAbstract.setImm(ABSTRACT(cfg) - WHERETO)
when (~io.dmactive){
goReg := false.B
}.otherwise {
when (goProgramBuffer | goAbstract) {
when (goAbstract) {
goReg := true.B
}.elsewhen (hartGoingWrEn){
assert(hartGoingId === 0.U, "Unexpected 'GOING' hart.")//Chisel3 #540 %x, expected %x", hartGoingId, 0.U)
@ -864,7 +844,7 @@ class TLDebugModuleInner(device: Device, getNComponents: () => Int)(implicit p:
nop.imm := 0.U
when (goAbstract) {
abstractGeneratedMem(0) := Mux(/*TODO: accessRegisterCommandReg.transfer*/true.B,
abstractGeneratedMem(0) := Mux(accessRegisterCommandReg.transfer,
Mux(accessRegisterCommandReg.write,
// To write a register, we need to do LW.
abstractGeneratedI.asUInt(),
@ -872,7 +852,7 @@ class TLDebugModuleInner(device: Device, getNComponents: () => Int)(implicit p:
abstractGeneratedS.asUInt()),
nop.asUInt()
)
abstractGeneratedMem(1) := Mux(/*TODO accessRegisterCommandReg.postexec*/ false.B,
abstractGeneratedMem(1) := Mux(accessRegisterCommandReg.postexec,
nop.asUInt(),
rocket.Instructions.EBREAK.value.U)
}
@ -888,13 +868,14 @@ class TLDebugModuleInner(device: Device, getNComponents: () => Int)(implicit p:
RESUMING -> Seq(WNotify(sbIdWidth, hartResumingId, hartResumingWrEn)),
EXCEPTION -> Seq(WNotify(sbIdWidth, hartExceptionId, hartExceptionWrEn)),
DATA -> abstractDataMem.map(x => RegField(8, x)),
PROGBUF -> programBufferMem.map(x => RegField(8, x)),
PROGBUF(cfg)-> programBufferMem.map(x => RegField(8, x)),
// These sections are read-only.
ROMBASE -> DebugRomContents().map(x => RegField.r(8, (x & 0xFF).U(8.W))),
WHERETO -> Seq(RegField.r(32, jalAbstract.asUInt)),
ABSTRACT(cfg)-> abstractGeneratedMem.map{x => RegField.r(32, x)},
FLAGS -> flags.map{x => RegField.r(8, x.asUInt())},
WHERETO -> Seq(RegField.r(32, whereToReg)),
ABSTRACT -> abstractGeneratedMem.map(x => RegField.r(32, x))
ROMBASE -> DebugRomContents().map(x => RegField.r(8, (x & 0xFF).U(8.W)))
)
// Override System Bus accesses with dmactive reset.
@ -909,7 +890,7 @@ class TLDebugModuleInner(device: Device, getNComponents: () => Int)(implicit p:
object CtrlState extends scala.Enumeration {
type CtrlState = Value
val Waiting, CheckGenerate, PreExec, Abstract, PostExec = Value
val Waiting, CheckGenerate, Exec = Value
def apply( t : Value) : UInt = {
t.id.U(log2Up(values.size).W)
@ -945,7 +926,7 @@ class TLDebugModuleInner(device: Device, getNComponents: () => Int)(implicit p:
val commandRegIsUnsupported = Wire(init = true.B)
val commandRegBadHaltResume = Wire(init = false.B)
when (commandRegIsAccessRegister) {
when ((accessRegisterCommandReg.regno >= 0x1000.U && accessRegisterCommandReg.regno <= 0x101F.U)){
when (!accessRegisterCommandReg.transfer || (accessRegisterCommandReg.regno >= 0x1000.U && accessRegisterCommandReg.regno <= 0x101F.U)){
commandRegIsUnsupported := false.B
commandRegBadHaltResume := ~hartHalted
}
@ -963,7 +944,6 @@ class TLDebugModuleInner(device: Device, getNComponents: () => Int)(implicit p:
when (wrAccessRegisterCommand || regAccessRegisterCommand) {
ctrlStateNxt := CtrlState(CheckGenerate)
}
}.elsewhen (ctrlStateReg === CtrlState(CheckGenerate)){
// We use this state to ensure that the COMMAND has been
@ -977,47 +957,11 @@ class TLDebugModuleInner(device: Device, getNComponents: () => Int)(implicit p:
errorHaltResume := true.B
ctrlStateNxt := CtrlState(Waiting)
}.otherwise {
when (accessRegisterCommandReg.preexec) {
ctrlStateNxt := CtrlState(PreExec)
goProgramBuffer := true.B
}.otherwise {
ctrlStateNxt := CtrlState(Abstract)
ctrlStateNxt := CtrlState(Exec)
goAbstract := true.B
}
}
}.elsewhen (ctrlStateReg === CtrlState(PreExec)) {
// We can't just look at 'hartHalted' here, because
// hartHaltedWrEn is overloaded to mean 'got an ebreak'
// which may have happened when we were already halted.
when(goReg === false.B && hartHaltedWrEn && (cfg.hartIdToHartSel(hartHaltedId) === selectedHartReg)){
ctrlStateNxt := CtrlState(Abstract)
goAbstract := true.B
}
when(hartExceptionWrEn) {
assert(hartExceptionId === 0.U, "Unexpected 'EXCEPTION' hart")// Chisel3 #540, %x, expected %x", hartExceptionId, 0.U)
ctrlStateNxt := CtrlState(Waiting)
errorException := true.B
}
}.elsewhen (ctrlStateReg === CtrlState(Abstract)) {
// We can't just look at 'hartHalted' here, because
// hartHaltedWrEn is overloaded to mean 'got an ebreak'
// which may have happened when we were already halted.
when(goReg === false.B && hartHaltedWrEn && (cfg.hartIdToHartSel(hartHaltedId) === selectedHartReg)){
when (accessRegisterCommandReg.postexec) {
ctrlStateNxt := CtrlState(PostExec)
goProgramBuffer := true.B
}.otherwise {
ctrlStateNxt := CtrlState(Waiting)
}
}
when(hartExceptionWrEn) {
assert(hartExceptionId === 0.U, "Unexpected 'EXCEPTION' hart")//Chisel3 #540 %x, expected %x", hartExceptionId, selectedHartReg)
ctrlStateNxt := CtrlState(Waiting)
errorUnsupported := true.B
}
}.elsewhen (ctrlStateReg === CtrlState(PostExec)) {
}.elsewhen (ctrlStateReg === CtrlState(Exec)) {
// We can't just look at 'hartHalted' here, because
// hartHaltedWrEn is overloaded to mean 'got an ebreak'
@ -1040,6 +984,7 @@ class TLDebugModuleInner(device: Device, getNComponents: () => Int)(implicit p:
}
}
// Wrapper around TL Debug Module Inner and an Async DMI Sink interface.
// Handles the synchronization of dmactive, which is used as a synchronous reset
// inside the Inner block.

3
src/main/scala/uncore/devices/debug/abstract_commands.scala
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@ -28,8 +28,7 @@ class ACCESS_REGISTERFields extends Bundle {
*/
val size = UInt(3.W)
// HACK -- for now I have not yet deleted preexecval reserved1 = UInt(1.W)
val preexec = Bool()
val reserved1 = UInt(1.W)
/* When 1, execute the program in the Program Buffer exactly once
after performing the transfer, if any.