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Adds some additional commentary as this takes shape.

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This commit is contained in:
Thomas Harte 2019-08-25 17:46:05 -04:00
parent eafbc12cc1
commit 081316c071
2 changed files with 13 additions and 1 deletions
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2
OSBindings/Mac/Clock Signal.xcodeproj/xcshareddata/xcschemes/Clock Signal.xcscheme
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@ -72,7 +72,9 @@
buildConfiguration = "Debug"
selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
enableAddressSanitizer = "YES"
enableASanStackUseAfterReturn = "YES"
enableUBSanitizer = "YES"
disableMainThreadChecker = "YES"
launchStyle = "0"
useCustomWorkingDirectory = "NO"

12
Storage/MassStorage/SCSI/TargetImplementation.hpp
View File

@ -30,6 +30,11 @@ template <typename Executor> void Target<Executor>::scsi_bus_did_change(Bus *, B
}
switch(phase_) {
/*
While awaiting selection the SCSI target is passively watching the bus waiting for its ID
to be set during a target selection. It will segue automatically from there to the command
phase regardless of its executor.
*/
case Phase::AwaitingSelection:
if(
(new_state & scsi_id_mask_) &&
@ -43,6 +48,12 @@ template <typename Executor> void Target<Executor>::scsi_bus_did_change(Bus *, B
}
break;
/*
In the command phase, the target will stream an appropriate number of bytes for the command
it is being offered, before giving the executor a chance to handle the command. If the target
supports this command, it becomes responsible for the appropriate next phase transition. If it
reports that it doesn't support that command, a suitable response is automatically dispatched.
*/
case Phase::Command:
// Wait for select to be disabled before beginning the control phase proper.
if((new_state & Line::SelectTarget)) return;
@ -62,7 +73,6 @@ template <typename Executor> void Target<Executor>::scsi_bus_did_change(Bus *, B
command_[command_pointer_] = uint8_t(new_state);
++command_pointer_;
if(command_pointer_ == command_.size()) {
printf("Dispatching command\n");
dispatch_command();
// TODO: if(!dispatch_command()) signal_error_somehow();