mirror of
https://github.com/danbulant/Cosmos
synced 2026-05-19 12:30:32 +00:00
90 lines
3 KiB
C#
90 lines
3 KiB
C#
using System;
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using System.Linq;
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using Cosmos.Assembler;
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using Cosmos.Assembler.x86;
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namespace Cosmos.Debug.DebugStub {
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public class CmdProcess : Cosmos.Assembler.Code {
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public CmdProcess(Assembler.Assembler aAssembler) : base(aAssembler) {}
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public override void Assemble() {
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new Comment("X#: Group DebugStub");
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new Comment("test when emitted after usage too");
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new Comment("X#: ! DebugStub_Const_DsVsip_CmdCompleted equ 9");
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new LiteralAssemblerCode("DebugStub_Const_DsVsip_CmdCompleted equ 9");
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new Comment("X#: procedure AckCommand {");
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new Label("DebugStub_AckCommand");
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new Comment("We acknowledge receipt of the command AND the processing of it.");
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new Comment("-In the past the ACK only acknowledged receipt.");
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new Comment("We have to do this because sometimes callers do more processing.");
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new Comment("We ACK even ones we dont process here, but do not ACK Noop.");
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new Comment("The buffers should be ok because more wont be sent till after our NACK");
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new Comment("is received.");
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new Comment("Right now our max cmd size is 2 (Cmd + Cmd ID) + 5 (Data) = 7.");
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new Comment("UART buffer is 16.");
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new Comment("We may need to revisit this in the future to ack not commands, but data chunks");
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new Comment("and move them to a buffer.");
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new Comment("The buffer problem exists only to inbound data, not outbound data (relative to DebugStub).");
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new Comment("X#: AL = #DsVsip_CmdCompleted");
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new Mov {DestinationReg = RegistersEnum.AL , SourceRef = Cosmos.Assembler.ElementReference.New("DebugStub_Const_DsVsip_CmdCompleted") };
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new Comment("AL = 9");
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new Comment("X#: ComWriteAL()");
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new Call { DestinationLabel = "DebugStub_ComWriteAL" };
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new Comment("X#: EAX = .CommandID");
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new Mov { DestinationReg = RegistersEnum.EAX , SourceRef = Cosmos.Assembler.ElementReference.New("DebugStub_CommandID"), SourceIsIndirect = true };
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new Comment("X#: ComWriteAL()");
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new Call { DestinationLabel = "DebugStub_ComWriteAL" };
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new Comment("X#: }");
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new Label("DebugStub_AckCommand_Exit");
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new Return();
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new Comment("X#: procedure ProcessCommandBatch {");
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new Label("DebugStub_ProcessCommandBatch");
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new Comment("X#: Begin:");
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new Label("DebugStub_ProcessCommandBatch_Begin");
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new Comment("X#: ProcessCommand()");
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new Call { DestinationLabel = "DebugStub_ProcessCommand" };
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new Comment("See if batch is complete");
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new Comment("Loop and wait");
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new Comment("VsipDs.BatchEnd");
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new Comment("X#: if AL != 8 goto Begin");
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new Compare { DestinationReg = RegistersEnum.AL, SourceValue = 8 };
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new ConditionalJump { Condition = ConditionalTestEnum.NotZero, DestinationLabel = "DebugStub_ProcessCommandBatch_Begin" };
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new Comment("X#: AckCommand()");
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new Call { DestinationLabel = "DebugStub_AckCommand" };
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new Comment("X#: }");
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new Label("DebugStub_ProcessCommandBatch_Exit");
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new Return();
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}
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}
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}
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