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Preboot debug info.

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This commit is contained in:
kudzu_cp 2012-06-27 00:22:34 +00:00
parent 879d070614
commit 0d3fbc1d21
2 changed files with 24 additions and 11 deletions
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30
source2/IL2CPU/Cosmos.IL2CPU.X86/CosmosAssembler.cs
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@ -177,15 +177,19 @@ namespace Cosmos.IL2CPU.X86 {
}
public void WriteDebugVideo(string aText) {
UInt32 xVideo = 0xB8000;
for (UInt32 i = xVideo; i < xVideo + 80 * 2; i = i + 2) {
new LiteralAssemblerCode("mov byte [0x" + i.ToString("X") + "], 0");
new LiteralAssemblerCode("mov byte [0x" + (i + 1).ToString("X") + "], 0x02");
}
// TODO: Add an option on the debug project properties to turn this off.
var xPreBootLogging = true;
if (xPreBootLogging) {
UInt32 xVideo = 0xB8000;
for (UInt32 i = xVideo; i < xVideo + 80 * 2; i = i + 2) {
new LiteralAssemblerCode("mov byte [0x" + i.ToString("X") + "], 0");
new LiteralAssemblerCode("mov byte [0x" + (i + 1).ToString("X") + "], 0x02");
}
foreach (var xChar in aText) {
new LiteralAssemblerCode("mov byte [0x" + xVideo.ToString("X") + "], " + (byte)xChar);
xVideo = xVideo + 2;
foreach (var xChar in aText) {
new LiteralAssemblerCode("mov byte [0x" + xVideo.ToString("X") + "], " + (byte)xChar);
xVideo = xVideo + 2;
}
}
}
@ -235,14 +239,16 @@ namespace Cosmos.IL2CPU.X86 {
// ie bootloader debugging. This must be the FIRST code, even before setup so we know
// we are being called properly by the bootloader and that if there are problems its
// somwhere in our code, not the bootloader.
WriteDebugVideo("Cosmos pre boot...");
WriteDebugVideo("Cosmos pre boot");
// For when using Bochs, causes a break ASAP on entry after initial Cosmos display.
new LiteralAssemblerCode("xchg bx, bx");
// CLI ASAP
WriteDebugVideo("Clearing interrupts.");
new ClrInterruptFlag();
WriteDebugVideo("Begin multiboot info.");
new Comment(this, "MultiBoot compliant loader provides info in registers: ");
new Comment(this, "EBX=multiboot_info ");
new Comment(this, "EAX=0x2BADB002 - check if it's really Multiboot loader ");
@ -265,7 +271,10 @@ namespace Cosmos.IL2CPU.X86 {
};
new Comment(this, "END - Multiboot Info");
WriteDebugVideo("Creating GDT.");
CreateGDT();
WriteDebugVideo("Creating IDT.");
CreateIDT();
#if LFB_1024_8
@ -279,6 +288,7 @@ namespace Cosmos.IL2CPU.X86 {
new Move { DestinationRef = Cosmos.Assembler.ElementReference.New("MultibootGraphicsRuntime_VbeMode"), DestinationIsIndirect = true, SourceReg = Registers.EAX };
#endif
WriteDebugVideo("Initializing SSE.");
new Comment(this, "BEGIN - SSE Init");
// CR4[bit 9]=1, CR4[bit 10]=1, CR0[bit 2]=0, CR0[bit 1]=1
new Mov { DestinationReg = Registers.EAX, SourceReg = Registers.CR4 };
@ -298,10 +308,12 @@ namespace Cosmos.IL2CPU.X86 {
new Comment(this, "END - SSE Init");
if (mComNumber > 0) {
WriteDebugVideo("Initializing DebugStub.");
new Call { DestinationLabel = "DebugStub_Init" };
}
// Jump to Kernel entry point
WriteDebugVideo("Jumping to kernel.");
new Call { DestinationLabel = EntryPointName };
new Comment(this, "Kernel done - loop till next IRQ");

5
source2/Users/Kudzu/Kudzu-Notes.html
View file

@ -31,11 +31,12 @@
<ul>
<li>Guess doesnt boot on USB or PXE</li>
<li>.iso has a users dir in it</li>
</ul>
<li>Proj props - Disable pre boot logging</ul>
<h3>
Kudzu</h3>
<ul>
<li>PXE<li>you switched the data and text segments, right? before text was first
<li>Auto disable debug stub instead of hanging<li>PXE<li>Wait for debug - or
press ESC<li>Proj props - disable debug stub<li>you switched the data and text segments, right? before text was first
data after, and now that&#39;s data-text? if so, we need to fix our &quot;EndOfKernel&quot;
code..<li>Press stop with vmwarwe
workstation<li>X# <ul>