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#define FOOLOS_MODULE_NAME "kernel"
#include "x86.h"
#include "../lib/logger/log.h" // logger facilities
// TODO: WHHYY can i compile it without the includes!???
///////
// interrupt handler prototypes
// todo: move somewhere else!?
void int_clock_handler();
void int_kb_handler();
void int_floppy_handler();
uint32_t read_eip();
/*
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)
{
//
// We want to get output to the screen as fast as possible!
//
// Our Fool-Boot-Loader did set up VESA already for us.
// The desired VESA mode is hardcoded in [boot/mbr.asm].
//
// The [vesa_init(...)] function requires:
//
// * the addresses of the vbeinfo struct
// * the address of the vbemodeinfo struct (for selected mode).
// * the address of our Fool-Font binary data.
//
// The first two paramters are hardcoded in [boot/mbr.asm],
// while the last one is set in the Makefile. The font binary
// is integrated in the kernel image.
//
// 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);
// multiprocessing / apic stuff
if(!find_mp())
panic(FOOLOS_MODULE_NAME,"Can not Find _MP_");
// pic
log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"setup PIC");
pic_setup();
// PIT config (timer)
timer_init();
// we know that here, the bootloader placed the mamory map!
mem_init(0x7c00+0x400,*((uint16_t *)(0x7c00+0x600)));
// paging (pass the vesa physbase address for identity mapping)
vmem_init(vesa_physbase);
// init and interrupt decriptor table
int_init(0x08);
// set default interrupts
int_install();
// setup some custom interrupts
// remember that we shifted all interrupts with the pic by 32
// so clock = 32 (irq 0)
// keyboard = 33 (irq 1)
// floppy = 38 (irq 6)
// etc..
// install PIT interrupt handler
int_install_ir(32, 0b10001110, 0x08,&int_clock_handler);
// install keyboard interrupt handler
int_install_ir(33, 0b10001110, 0x08,&int_kb_handler);
// install floppy interrupt handler
int_install_ir(38, 0b10001110, 0x08,&int_floppy_handler);
// now we can enable interrupts back again
int_enable();
// pci
pci_init();
// floppy
// floppy_init();
//init shell
shell_init();
// multitasking
task_init();
while(1)
{
}
}
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