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Annotation of prex-old/sys/arch/i386/pc/machdep.c, Revision 1.1.1.1

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 <cpu.h>
                     36:
                     37: /*
                     38:  * Setup pages.
                     39:  * This reserves some kernel pages which includes a page for
                     40:  * kernel page directory, interrupt stack, boot stack, etc.
                     41:  */
                     42: static void
                     43: page_setup(void)
                     44: {
                     45:        struct mem_map *mem;
                     46:        int i;
                     47:
                     48:        /*
                     49:         * Find empty slot, and set reserved pages
                     50:         */
                     51:        for (i = 0; i < NRESMEM; i++) {
                     52:                mem = &boot_info->reserved[i];
                     53:                if (mem->size == 0) {
                     54:                        mem->start = RESERVED_BASE;
                     55:                        mem->size = (RESERVED_MAX - RESERVED_BASE);
                     56:                        break;
                     57:                }
                     58:        }
                     59:        ASSERT(i != NRESMEM);
                     60: }
                     61:
                     62: /*
                     63:  * Cause an i386 machine reset.
                     64:  */
                     65: void
                     66: machine_reset(void)
                     67: {
                     68:        int i;
                     69:
                     70:        /*
                     71:         * Try to do keyboard reset.
                     72:         */
                     73:        cli();
                     74:        outb(0xfe, 0x64);
                     75:        for (i = 0; i < 10000; i++)
                     76:                outb(0, 0x80);
                     77:
                     78:        /*
                     79:         * Do cpu reset.
                     80:         */
                     81:        cpu_reset();
                     82:        /* NOTREACHED */
                     83: }
                     84:
                     85: /*
                     86:  * Machine-dependent startup code
                     87:  */
                     88: void
                     89: machine_init(void)
                     90: {
                     91:
                     92:        cpu_init();
                     93:
                     94: #ifdef CONFIG_GDB
                     95:        gdb_init();
                     96: #endif
                     97:        page_setup();
                     98:        interrupt_init();
                     99: }