#include "uart.h"
#include "task.h"
#include "shell.h"

#define TIMER_BASE  0x101E2000
#define TIMER_LOAD  (*(volatile unsigned int *)(TIMER_BASE + 0x00))
#define TIMER_CTRL  (*(volatile unsigned int *)(TIMER_BASE + 0x08))

void timer_init() {
    TIMER_LOAD = 0x10000;
    TIMER_CTRL = (1 << 7) | (1 << 6) | (1 << 5) | 1;
}

void enable_interrupts() {
    __asm__ volatile (
        "mrs r0, cpsr\n"
        "bic r0, r0, #0x80\n"
        "msr cpsr_c, r0\n"
    );
}

void kernel_main(void) {
    uart_init();
    uart_write("MiniOS Kernel Booted\n");

    timer_init();
    enable_interrupts();

    task_init();

    shell_run();
}