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#include "kernel.h" // general kernel config & includes
#include "console.h" // this will allow us to write to screen
// TODO: cleanup . how can i compile it without the includes!??
///////
void int_kb_handler();
void int_clock_handler();
////////// KERNEL MAIN///// /////
//
// test handler
void int_test_handler()
{
__asm__("pusha");
scr_put_string("inside software interrupt handler 88");
__asm__("popa");
__asm__("leave");
__asm__("iret");
}
void kernel_main()
{
// clear console
scr_clear();
// hello message
scr_put_string_nl(KERNEL_HELLO_MESSAGE);
//pit config
timer_init();
scr_put_string_nl("Configured PIT Channel 0 : Mode 2 : 1/25 s.");
/*
//probe memory
scr_put_string_nl("Probing core memory...");
char *prober=0xf000;
for(;prober<0xfffffff;prober+=0xf00)
{
*prober='x';
if(*prober!='x')break;
}
//0xA5000
scr_put_hex((uint32_t)prober>>16);
scr_put_hex((uint32_t)prober&0xffff);
scr_put_string_nl(" finished!");
//
*/
uint16_t *memmap=0x7c00+0x120;
uint32_t avail_mem=0;
//print memory map:
while(1)
{
if(memmap[8]==0)break;
if(memmap[8]==1)
{
avail_mem+=memmap[4]+(memmap[5]<<16);
}
//bytes: 8 8 4 4//
//scr_put_hex(memmap[3]);
//scr_put_string(" ");
//scr_put_hex(memmap[2]);
//scr_put_string(" ");
scr_put_hex(memmap[1]);
scr_put_string(" ");
scr_put_hex(memmap[0]);
scr_put_string(" ");
// scr_put_hex(memmap[4]);
// scr_put_string(" ");
// scr_put_hex(memmap[5]);
// scr_put_string(" ");
// scr_put_hex(memmap[6]);
// scr_put_string(" ");
// scr_put_hex(memmap[7]);
scr_put_string(" - ");
// scr_put_hex(memmap[8]);
// scr_put_string(" ");
// scr_put_hex(memmap[9]);
// scr_put_string(" ");
// scr_put_hex(memmap[10]);
// scr_put_string(" ");
// scr_put_hex(memmap[11]);
// scr_put_string(" ");
//scr_put_hex(memmap[7]);
//scr_put_string(" ");
//scr_put_hex(memmap[6]);
//scr_put_string(" ");
scr_put_hex(memmap[5]);
scr_put_string(" ");
scr_put_hex(memmap[4]);
scr_put_string(" : ");
scr_put_hex(memmap[8]);
// scr_put_string(" ");
// scr_put_hex(memmap[9]);
scr_put_string_nl("");
memmap+=12;
}
scr_put_string("Total Available Mem: ");
scr_put_hex(avail_mem>>16);
scr_put_string(" ");
scr_put_hex(avail_mem&0xffff);
scr_put_string_nl(" byte");
scr_put_string_nl("");
// init and interrupt decriptor table
int_init(0x08);
int_install();
// setup custom interrupts
// remember that we shifted all interrupts with the pic by 32
// so clock = 32 (irq 0)
// keyboard = 22 (irq 1)
// 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 test software interrupt handler
int_install_ir(88, 0b10001110, 0x08,&int_test_handler);
// now we can enable interrupts back again
int_enable();
scr_put_string_nl("Interrupts are up and running");
//init shell
shell_init();
// kernel main loop
while(1)
{
}
}
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