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kernel.c

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/*!     \file kernel/kernel.c
 *      \brief Generic routines for kernel.
 *      \author Andrea Righi <drizzt@inwind.it>
 *      \date Last update: 2003-08-23
 *      \note Copyright (&copy;) 2003 Andrea Righi
 */

#include <const.h>

#include <arch/i386.h>

#include <kernel/clock.h>
#include <kernel/console.h>
#include <kernel/keyboard.h>
#include <kernel/speaker.h>
#include <kernel/task.h>

#include <kernel/kernel.h>

//! \brief Report a critical error to the console.
//! \param msg The message you want to display.
//! \warning
//!     If this routine is invoked by a task it will be killed.
//! \warning
//!     PANIC: if this routine is invoked by the kernel
//!     the system will be halted!!!
void error(const byte *msg)
{
        disable();
        beep();
        set_color(LIGHT_RED);
        kprintf("\n\rERROR: %s", msg);
        set_color(DEFAULT_COLOR);
        kprintf("\n\rTask [%s] (%i) killed!", get_pname(), get_pid());

        sched_leave_critical_region();

        // If the kernel has generated this error HALT the system!      //
        if (get_pid())
                auto_kill( 1 );
        else
                halt();
}

//! \brief Reboot the system using the keyboard CPU reset line.
//! \warning
//!     If it cannot reboot, the system will be halted.
void reboot()
{
        // Disable all interrupts                                       //
        disable();

        beep();

        set_color(DEFAULT_COLOR);
        kprintf("\n\r");

        // Reset system clock                                           //
        kprintf("Reset system clock...");
        stop_clock();
        set_color(GREEN);
        kprintf("\n                                     [ OK ]\n\r");
        set_color(DEFAULT_COLOR);

        kprintf("\n\rRebooting system...");

        // Pulse the CPU reset line                                     //
        keyb_wait();
        outportb(0x64, 0xFE);

        // If doesn't reboot => halt the system!                        //
        halt();
}

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