quasi functionnal idt

Makefile

@@ -169,7 +169,7 @@ debug: all
 
 gdb: all
 	@qemu-system-x86_64 -m 64M -hda $(BUILDDIR)/bin/disk.img -no-reboot \
-	-no-shutdown -d cpu_reset,guest_errors,pcall,int -s 2> $(BUILDDIR)/qemu.log &
+	-no-shutdown -d cpu_reset,guest_errors,pcall,int -s -S 2> $(BUILDDIR)/qemu.log &
 	@ndisasm $(BINDIR)/kaleid -o 0x00100000 -b 64 > kaleid64_disasm.asm
 	@ndisasm $(BINDIR)/kaleid -o 0x00100000 -b 32 > kaleid32_disasm.asm
 	@gdb \

include/kernel/cpu.h

@@ -133,9 +133,10 @@ struct Registers_t
 
 // -------------------------------------------------------------------------- //
 
-void idtSetup(void);
+void CpuIdtSetup(void);
 void idtSet(uchar rank, ulong base, ushort selector, uchar flags);
 void isrHandler(Registers_t reg);
+void disablePIC(void);
 
 // -------------------------------------------------------------------------- //
 

kaleid/kernel/cpu/idt.c

@@ -25,17 +25,15 @@
 #include <kernel/base.h>
 #include <kernel/cpu.h>
 #include <kernel/boot.h>
+#include <kernel/iomisc.h>
 
 IdtEntry_t idt[256] = { 0 };
 IdtPtr_t idtPtr;
 
-void isrHandlerPrint(Registers_t regs)
+void CpuIdtSetup(void)
 {
-    DebugLog("Interrupt %d !!! \n", regs.intNo);
-}
+    disablePIC();
 
-void idtSetup(void)
-{
     ushort codeSeg = (ushort)(ulong)BtLoaderInfo.codeSegment;
 
     // Set IDT ptr
@@ -76,13 +74,9 @@ void idtSetup(void)
     //idtSet(30, (ulong)isr30, codeSeg, 0x8E);  INTEL RESERVED
 
     // Load IDT
+    DebugLog("[IdtSetup] Filled \n");
     idtInit();
-    DebugLog("[IdtSetup] Filled at %d with %d bytes\n", sizeof(idtPtr), sizeof(IdtEntry_t));
-    DebugLog("[IdtSetup] offset %p with %p bytes\n", (ulong)(&idtPtr), (ulong)(idt));
-    //asm volatile ("sti":::"memory");
-    DebugLog("           And initialized !\n");
-
-    asm volatile ("int %0" : : "N" (0) : "cc", "memory");
+    DebugLog("[IdtSetup] Initialized !\n");
 }
 
 void idtSet(uchar rank, ulong base, ushort selector, uchar flags)
@@ -100,3 +94,35 @@ void idtSet(uchar rank, ulong base, ushort selector, uchar flags)
     idt[rank].reservedIst = 0;
     idt[rank].reserved = 0;
 }
+
+void disablePIC(void) {
+    // Set ICW1
+    IoWriteByteOnPort(0x20, 0x11);
+    IoWriteByteOnPort(0xa0, 0x11);
+
+    // Set ICW2 (IRQ base offsets)
+    IoWriteByteOnPort(0x21, 0xe0);
+    IoWriteByteOnPort(0xa1, 0xe8);
+
+    // Set ICW3
+    IoWriteByteOnPort(0x21, 4);
+    IoWriteByteOnPort(0xa1, 2);
+
+    // Set ICW4
+    IoWriteByteOnPort(0x21, 1);
+    IoWriteByteOnPort(0xa1, 1);
+
+    // Set OCW1 (interrupt masks)
+    IoWriteByteOnPort(0x21, 0xff);
+    IoWriteByteOnPort(0xa1, 0xff);
+
+    // ENABLING LOCAL APIC
+    uint *val = (void*)0xfee000f0;
+    *val |= (1<<8);
+}
+
+void isrHandler(Registers_t regs)
+{
+    DebugLog("Interrupt %d !!! \n", regs.intNo);
+    return;
+}

kaleid/kernel/cpu/isr.asm

@@ -26,41 +26,34 @@
 
 global idtInit
 extern idtPtr
-extern isrHandlerPrint
+extern isrHandler
 
 ;;
 ;; Loads the IDT
 ;;
 idtInit:
     lidt [idtPtr]
+    sti
     ret
 
 ;;
 ;; ISR handler
 ;;
-isrHandler:
+isrPreHandler:
     pushAll
 
+    xor rax, rax
     mov ax, ds
     push rax
 
-    mov ax, 0x10
+    call isrHandler
+
+    pop rax
     mov ds, ax
-    mov es, ax
-    mov fs, ax
-    mov gs, ax
-
-    call isrHandlerPrint
-
-    pop rbx
-    mov ds, bx
-    mov es, bx
-    mov fs, bx
-    mov gs, bx
 
     popAll
     add rsp, 8
-    ;sti
+    sti
     iretq
 
 ;; Divide Error Fault

kaleid/kernel/cpu/isr.inc

@@ -47,7 +47,7 @@
     cli
     push byte 0
     push byte %1
-    jmp isrHandler
+    jmp isrPreHandler
 %endmacro
 
 %macro IsrWithErrCode 1
@@ -55,5 +55,5 @@
   isr%1:
     cli
     push byte %1
-    jmp isrHandler
+    jmp isrPreHandler
 %endmacro

kaleid/kernel/init/init.c

@@ -40,6 +40,12 @@ extern error_t IoInitVGABuffer(void);
 // ps/proc.c test function
 extern void pstest(void);
 
+void bug(void)
+{
+    asm volatile ("int %0" : : "N" (0) : "cc", "memory");
+}
+
+
 //
 // Entry point of the Kaleid kernel
 //
@@ -67,9 +73,10 @@ noreturn void BtStartKern(multiboot_info_t *mbInfo, uint mbMagic, void *codeSeg)
     MmInitHeap();
     PsInitSched();
 
-    MmPrintMemoryMap();
+    //MmPrintMemoryMap();
+    CpuIdtSetup();
 
-    idtSetup();
+    bug();
 
     // End this machine's suffering
     BFlushBuf(BStdOut);