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Annotation of prex/sys/arch/i386/pc/machdep.c, Revision 1.1

1.1     ! nbrk        1: /*-
        !             2:  * Copyright (c) 2005-2007, Kohsuke Ohtani
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. Neither the name of the author nor the names of any co-contributors
        !            14:  *    may be used to endorse or promote products derived from this software
        !            15:  *    without specific prior written permission.
        !            16:  *
        !            17:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
        !            18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
        !            21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            27:  * SUCH DAMAGE.
        !            28:  */
        !            29:
        !            30: /*
        !            31:  * machdep.c - machine-dependent routines
        !            32:  */
        !            33:
        !            34: #include <kernel.h>
        !            35: #include <locore.h>
        !            36: #include <cpu.h>
        !            37:
        !            38: /*
        !            39:  * Setup pages.
        !            40:  * This reserves some kernel pages which includes a page for
        !            41:  * kernel page directory, interrupt stack, boot stack, etc.
        !            42:  */
        !            43: static void
        !            44: page_setup(void)
        !            45: {
        !            46:        struct mem_map *mem;
        !            47:        int i;
        !            48:
        !            49:        /*
        !            50:         * Find empty slot, and set reserved pages
        !            51:         */
        !            52:        for (i = 0; i < NRESMEM; i++) {
        !            53:                mem = &boot_info->reserved[i];
        !            54:                if (mem->size == 0) {
        !            55:                        mem->start = RESERVED_BASE;
        !            56:                        mem->size = (RESERVED_MAX - RESERVED_BASE);
        !            57:                        break;
        !            58:                }
        !            59:        }
        !            60:        ASSERT(i != NRESMEM);
        !            61: }
        !            62:
        !            63: /*
        !            64:  * Cause an i386 machine reset.
        !            65:  */
        !            66: void
        !            67: machine_reset(void)
        !            68: {
        !            69:        int i;
        !            70:
        !            71:        /*
        !            72:         * Try to do keyboard reset.
        !            73:         */
        !            74:        interrupt_disable();
        !            75:        outb(0xfe, 0x64);
        !            76:        for (i = 0; i < 10000; i++)
        !            77:                outb(0, 0x80);
        !            78:
        !            79:        /*
        !            80:         * Do cpu reset.
        !            81:         */
        !            82:        cpu_reset();
        !            83:        /* NOTREACHED */
        !            84: }
        !            85:
        !            86: /*
        !            87:  * Idle
        !            88:  */
        !            89: void
        !            90: machine_idle(void)
        !            91: {
        !            92:
        !            93:        cpu_idle();
        !            94: }
        !            95:
        !            96:
        !            97: /*
        !            98:  * Machine-dependent startup code
        !            99:  */
        !           100: void
        !           101: machine_init(void)
        !           102: {
        !           103:
        !           104:        cpu_init();
        !           105: #ifdef CONFIG_GDB
        !           106:        gdb_init();
        !           107: #endif
        !           108:        page_setup();
        !           109:        interrupt_init();
        !           110: }