Added multitasking support for two tasks ;)

1 files changed, 70 insertions, 17 deletions

diff --git a/kernel/kernel.c b/kernel/kernel.c
index 88df43e..eee66d7 100644
--- a/kernel/kernel.c
+++ b/kernel/kernel.c
@@ -24,24 +24,56 @@ void int_floppy_handler();
 
 uint32_t read_eip();
 
-// just a test handler for software interrupt 88, todo: remove and 
-// implement some syscalls!
-//
-void int_test_handler_worker()
-{
-    // this can not be called directly from interrupt handler
-    // due to optional parameters (...)  probably!
-   panic(FOOLOS_MODULE_NAME,"unhandled EXCEPTION!");
-}
-void int_test_handler()
+void int_unhandled()
 {
     X86_IRQ_BEGIN
-    int_test_handler_worker();
-    sleep(30);
-    while(1); // hang!
+    panic(FOOLOS_MODULE_NAME,"unhandled EXCEPTION!");
     X86_IRQ_END
 }
 
+void int_irq0(){ X86_IRQ_BEGIN  panic(FOOLOS_MODULE_NAME,"Divide by 0");   X86_IRQ_END }
+void int_irq1(){ X86_IRQ_BEGIN  panic(FOOLOS_MODULE_NAME,"Single step (debugger)");   X86_IRQ_END }
+void int_irq2(){ X86_IRQ_BEGIN  panic(FOOLOS_MODULE_NAME,"Non Maskable Interrupt");   X86_IRQ_END }
+void int_irq3(){ X86_IRQ_BEGIN  panic(FOOLOS_MODULE_NAME,"Breakpoint (debugger)");   X86_IRQ_END }
+void int_irq4(){ X86_IRQ_BEGIN  panic(FOOLOS_MODULE_NAME,"Overflow");   X86_IRQ_END }
+void int_irq5(){ X86_IRQ_BEGIN  panic(FOOLOS_MODULE_NAME,"Bounds check");   X86_IRQ_END }
+void int_irq6(){ X86_IRQ_BEGIN  panic(FOOLOS_MODULE_NAME,"Undefined OP Code");   X86_IRQ_END }
+void int_irq7(){ X86_IRQ_BEGIN  panic(FOOLOS_MODULE_NAME,"No coprocessor");   X86_IRQ_END }
+void int_irq8(){ X86_IRQ_BEGIN  panic(FOOLOS_MODULE_NAME,"Double Fault");   X86_IRQ_END }
+void int_irq9(){ X86_IRQ_BEGIN  panic(FOOLOS_MODULE_NAME,"Coprocessor Segment Overrun");   X86_IRQ_END }
+void int_irq10(){ X86_IRQ_BEGIN  panic(FOOLOS_MODULE_NAME,"Invalid TSS");   X86_IRQ_END }
+void int_irq11(){ X86_IRQ_BEGIN  panic(FOOLOS_MODULE_NAME,"Segment Not Present");   X86_IRQ_END }
+void int_irq12(){ X86_IRQ_BEGIN  panic(FOOLOS_MODULE_NAME,"Stack Segment Overrun");   X86_IRQ_END }
+
+void show_error(uint32_t err)
+{
+   log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"interrupt error code:  0x%08x",err);
+   log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"External Event: %x",err&0b001);
+   log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"Location: %x",err&0b110);
+   log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"Selector: %x",err&0b1111111111111000);
+}
+
+void int_irq13()
+{
+    X86_IRQ_BEGIN  
+
+     
+    uint32_t err;
+    asm("pop %eax");  // get Error Code
+    asm ("mov %%eax, %0":"=r"(err));
+    show_error(err);
+
+    panic(FOOLOS_MODULE_NAME,"General Protection Fault");   
+
+    X86_IRQ_END 
+}
+
+void int_irq14(){ X86_IRQ_BEGIN  panic(FOOLOS_MODULE_NAME,"Page Fault");   X86_IRQ_END }
+void int_irq15(){ X86_IRQ_BEGIN  panic(FOOLOS_MODULE_NAME,"Unassigned");   X86_IRQ_END }
+void int_irq16(){ X86_IRQ_BEGIN  panic(FOOLOS_MODULE_NAME,"Coprocessor error");   X86_IRQ_END }
+void int_irq17(){ X86_IRQ_BEGIN  panic(FOOLOS_MODULE_NAME,"Alignment Check");   X86_IRQ_END }
+void int_irq18(){ X86_IRQ_BEGIN  panic(FOOLOS_MODULE_NAME,"Machine Check");   X86_IRQ_END }
+
 // heart of our operating system.
 void kernel_main(uint32_t initial_stack)
 {
@@ -69,7 +101,6 @@ void kernel_main(uint32_t initial_stack)
 
     log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"initial esp: 0x%08X",initial_stack);
 
-    //
     // PIT config (timer)
     timer_init();
   
@@ -104,10 +135,31 @@ void kernel_main(uint32_t initial_stack)
     int_install_ir(38, 0b10001110, 0x08,&int_floppy_handler);
 
     // install test software interrupt handler
-    int_install_ir(88, 0b10001110, 0x08,&int_test_handler);
+    int_install_ir(88, 0b10001110, 0x08,&int_unhandled);
     
-    for(int i=0;i<19;i++)
-	int_install_ir(i, 0b10001110, 0x08,&int_test_handler);
+    // exceptions
+    int_install_ir(0, 0b10001110, 0x08,&int_irq0);
+    int_install_ir(1, 0b10001110, 0x08,&int_irq1);
+    int_install_ir(2, 0b10001110, 0x08,&int_irq2);
+    int_install_ir(3, 0b10001110, 0x08,&int_irq3);
+    int_install_ir(4, 0b10001110, 0x08,&int_irq4);
+    int_install_ir(5, 0b10001110, 0x08,&int_irq5);
+    int_install_ir(6, 0b10001110, 0x08,&int_irq6);
+    int_install_ir(7, 0b10001110, 0x08,&int_irq7);
+    int_install_ir(8, 0b10001110, 0x08,&int_irq8);
+    int_install_ir(9, 0b10001110, 0x08,&int_irq9);
+    int_install_ir(10, 0b10001110, 0x08,&int_irq10);
+    int_install_ir(11, 0b10001110, 0x08,&int_irq11);
+    int_install_ir(12, 0b10001110, 0x08,&int_irq12);
+    int_install_ir(13, 0b10001110, 0x08,&int_irq13);
+    int_install_ir(14, 0b10001110, 0x08,&int_irq14);
+    int_install_ir(15, 0b10001110, 0x08,&int_irq15);
+    int_install_ir(16, 0b10001110, 0x08,&int_irq16);
+    int_install_ir(17, 0b10001110, 0x08,&int_irq17);
+    int_install_ir(18, 0b10001110, 0x08,&int_irq18);
+
+    // multitasking
+    task_init();
 
     // now we can enable interrupts back again
     int_enable();
@@ -120,6 +172,7 @@ void kernel_main(uint32_t initial_stack)
     // floppy
     floppy_init();
 
+
     //init shell
     shell_init();
     /*