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debug: report UNSUPPORTED more consistently. Allow haltreq/resumereq to be R as well as W.

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This commit is contained in:
Megan Wachs 2017-06-27 17:40:58 -07:00
parent e1fe0f245b
commit 3fc75c2714
1 changed files with 10 additions and 2 deletions
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12
src/main/scala/uncore/devices/debug/Debug.scala
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@ -329,6 +329,8 @@ class TLDebugModuleOuter(device: Device)(implicit p: Parameters) extends LazyMod
when (DMCONTROLWrEn) {
DMCONTROLNxt.ndmreset := DMCONTROLWrData.ndmreset
DMCONTROLNxt.hartsel := DMCONTROLWrData.hartsel
DMCONTROLNxt.haltreq := DMCONTROLWrData.haltreq
DMCONTROLNxt.resumereq := DMCONTROLWrData.resumereq
}
}
@ -937,6 +939,8 @@ class TLDebugModuleInner(device: Device, getNComponents: () => Int)(implicit p:
val commandWrIsAccessRegister = (COMMANDWrData.cmdtype === DebugAbstractCommandType.AccessRegister.id.U)
val commandRegIsAccessRegister = (COMMANDReg.cmdtype === DebugAbstractCommandType.AccessRegister.id.U)
val commandWrIsUnsupported = COMMANDWrEn && !commandWrIsAccessRegister;
val commandRegIsUnsupported = Wire(init = true.B)
val commandRegBadHaltResume = Wire(init = false.B)
when (commandRegIsAccessRegister) {
@ -954,16 +958,20 @@ class TLDebugModuleInner(device: Device, getNComponents: () => Int)(implicit p:
// -----------------------
when (ctrlStateReg === CtrlState(Waiting)){
when (wrAccessRegisterCommand || regAccessRegisterCommand) {
ctrlStateNxt := CtrlState(CheckGenerate)
}.elsewhen (commandWrIsUnsupported) { // These checks are really on the command type.
errorUnsupported := true.B
}.elsewhen (autoexec && commandRegIsUnsupported) {
errorUnsupported := true.B
}
}.elsewhen (ctrlStateReg === CtrlState(CheckGenerate)){
// We use this state to ensure that the COMMAND has been
// registered by the time that we need to use it, to avoid
// generating it directly from the COMMANDWrData.
// This 'commandRegIsUnsupported' is really just checking the
// AccessRegisterCommand parameters (regno)
when (commandRegIsUnsupported) {
errorUnsupported := true.B
ctrlStateNxt := CtrlState(Waiting)