diff options
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/kernel.c | 45 |
1 files changed, 25 insertions, 20 deletions
diff --git a/kernel/kernel.c b/kernel/kernel.c index ebb3841..ce22b84 100644 --- a/kernel/kernel.c +++ b/kernel/kernel.c @@ -1,15 +1,8 @@ -// -// http://www.jamesmolloy.co.uk/tutorial_html/9.-Multitasking.html -// +#define FOOLOS_MODULE_NAME "kernel" -#include "kernel.h" // general kernel config & includes -#include "console.h" // this will allow us to write to screen #include "x86.h" - #include "../lib/logger/log.h" // logger facilities -#define FOOLOS_MODULE_NAME "kernel" - -// TODO: cleanup . WHHYY can i compile it without the includes!?? +// TODO: WHHYY can i compile it without the includes!??? /////// // interrupt handler prototypes @@ -19,12 +12,9 @@ void int_clock_handler(); void int_kb_handler(); void int_floppy_handler(); -////////// KERNEL MAIN///// ///// -// uint32_t read_eip(); - 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 } @@ -67,18 +57,34 @@ void int_irq16(){ X86_IRQ_BEGIN panic(FOOLOS_MODULE_NAME,"Coprocessor error"); 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 } +// enable A20 +// http://www.brokenthorn.com/Resources/OSDev9.html +// Method 3.1: Enables A20 through keyboard controller +/* void enable_a20() { -//; ;enable A20 -//; ;http://www.brokenthorn.com/Resources/OSDev9.html -//; ;Method 3.1: Enables A20 through keyboard controller -//; ;Not all keyboard controllers support this +// Not all keyboard controllers support this asm("mov $0xdd, %al");// ; command 0xdd: enable a20 -//; ;mov al, 0xdf ; command 0xdf: disable a20 +// asm("mov $0xdf, %al");// ; command 0xdd: disable a20 asm("outb %al, $0x64");// ; send command to controller } +*/ -// heart of our operating system. +/* +void test_a20() +{ + uint16_t *test=0x7dfe; + test+=1024*1024; +// *test=0x69; +// test=0x8abcd; + log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"A20 test: 0x%02X ",*test); + + +} +*/ + +////////// KERNEL MAIN///// ///// +// this is the very heart of our operating system! void kernel_main(uint32_t initial_stack) { @@ -101,13 +107,12 @@ void kernel_main(uint32_t initial_stack) // this function returns the physical base address of // our video memory // + uint32_t vesa_physbase=vesa_init(0x8300,0x8400,0x7200); // initial stack log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"initial esp: 0x%08X",initial_stack); - log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"enable A20"); - enable_a20(); log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"setup PIC"); pic_setup(); |