source: trunk/hal/x86_64/core/hal_interrupt.c

/*
 * hal_interrupt.c - Implementation of interrupt handler for x86_64
 *
 * Copyright (c) 2017 Maxime Villard
 *
 * This file is part of ALMOS-MKH.
 *
 * ALMOS-MKH is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2.0 of the License.
 *
 * ALMOS-MKH is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with ALMOS-MKH; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <hal_kernel_types.h>
#include <kernel_config.h>
#include <thread.h>
#include <do_interrupt.h>
#include <hal_interrupt.h>

#include <hal_kentry.h>
#include <hal_apic.h>
#include <hal_internal.h>
#include <hal_special.h>
#include <hal_segmentation.h>

/* -------------------------------------------------------------------------- */

/*
 * Timer interrupt
 */
void hal_timer_intr(hal_trapframe_t *tf)
{
        core_t *core = CURRENT_THREAD->core;

        if (hal_get_gid() == 0) {
                /* print the message only for cpu0 */
                x86_printf("-> got timer: cpu%z rip=%Z (th=%Z)\n", hal_get_gid(),
                    tf->tf_rip, hal_get_current_thread());
        }

        core_clock(core);
}

/* -------------------------------------------------------------------------- */

/*
 * Serial Port (COM1) interrupt
 */
void hal_com1_intr(hal_trapframe_t *tf)
{
        static char prev;
        uint8_t chan;
        char c;

        if (prev & 0x80) {
                /* the previous char was the channel number (tty) */
                c = hal_com_read();
                chan = prev & 0x7F;
                x86_printf("-> got com [%z,'%c']\n", (uint64_t)chan, c);
                prev = 0;
        } else {
                prev = hal_com_read();
        }

        return;
}

/* -------------------------------------------------------------------------- */

#define PS2_DATA        0x60

#define PS2_STATUS      0x64
#       define STATUS_OUT_FULL  0x00
#       define STATUS_IN_FULL   0x01
#       define STATUS_SYS_FLAG  0x02

#define PS2_CMD 0x64

/*
 * US scancode table, found on the internet.
 */
unsigned char scancode_US[128] =
{
         0,     27, '1', '2', '3', '4', '5', '6', '7', '8', '9', '0', '-', '=',
        '\b', '\t', 'q', 'w', 'e', 'r', 't', 'y', 'u', 'i', 'o', 'p', '[', ']',
        '\n',
         0,     /* 29   - Control */
        'a',   's', 'd', 'f', 'g', 'h', 'j', 'k', 'l', ';', '\'', '`',
         0,     /* Left shift */
        '\\',  'z', 'x', 'c', 'v', 'b', 'n', 'm', ',', '.', '/',
         0,     /* Right shift */
        '*',
         0,     /* Alt */
        ' ',    /* Space bar */
         0,     /* Caps lock */
         0,     /* 59 - F1 key ... > */
         0,   0,   0,   0,   0,   0,   0,   0,
         0,     /* < ... F10 */
         0,     /* 69 - Num lock*/
         0,     /* Scroll Lock */
         0,     /* Home key */
         0,     /* Up Arrow */
         0,     /* Page Up */
        '-',
         0,     /* Left Arrow */
         0,
         0,     /* Right Arrow */
        '+',
         0,     /* 79 - End key*/
         0,     /* Down Arrow */
         0,     /* Page Down */
         0,     /* Insert Key */
         0,     /* Delete Key */
         0,   0,   0,
         0,     /* F11 Key */
         0,     /* F12 Key */
         0,     /* All other keys are undefined */
};      

/*
 * Keyboard interrupt (8042 PS/2)
 */
void hal_keyboard_intr(hal_trapframe_t *tf)
{
        uint64_t val;

        do {
                val = in8(PS2_STATUS);
        } while ((val & STATUS_IN_FULL) == 0);

        val = in8(PS2_DATA);

        x86_printf("-> got keyboard: cpu%z rip=%Z key=%c ", hal_get_gid(),
            tf->tf_rip, scancode_US[val]);

        if (val & 0x80)
                x86_printf("[released]\n");
        else
                x86_printf("[pressed]\n");

        return;
}


/* -------------------------------------------------------------------------- */

void hal_do_interrupt( thread_t * this,
                               reg_t    * regs_tbl )
{
        x86_panic((char *)__func__);
}