File: [local] / prex / sys / arch / i386 / pc / machdep.c (download)
Revision 1.1.1.1 (vendor branch), Tue Aug 19 12:46:56 2008 UTC (16 years, 1 month ago) by nbrk
Branch: MAIN, KOHSUKE
CVS Tags: PREX_0_8_BASE, HEAD Changes since 1.1: +0 -0 lines
Initial import of Prex, Portable Real-time Embedded POSIX microkernel system.
I have totally new directions in my development (more focused on real hardware, not virtual one).
Old hacks are available in prex-old module. They will be carefully re-designed and merged soon.
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/*-
* Copyright (c) 2005-2007, Kohsuke Ohtani
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* machdep.c - machine-dependent routines
*/
#include <kernel.h>
#include <locore.h>
#include <cpu.h>
/*
* Setup pages.
* This reserves some kernel pages which includes a page for
* kernel page directory, interrupt stack, boot stack, etc.
*/
static void
page_setup(void)
{
struct mem_map *mem;
int i;
/*
* Find empty slot, and set reserved pages
*/
for (i = 0; i < NRESMEM; i++) {
mem = &boot_info->reserved[i];
if (mem->size == 0) {
mem->start = RESERVED_BASE;
mem->size = (RESERVED_MAX - RESERVED_BASE);
break;
}
}
ASSERT(i != NRESMEM);
}
/*
* Cause an i386 machine reset.
*/
void
machine_reset(void)
{
int i;
/*
* Try to do keyboard reset.
*/
interrupt_disable();
outb(0xfe, 0x64);
for (i = 0; i < 10000; i++)
outb(0, 0x80);
/*
* Do cpu reset.
*/
cpu_reset();
/* NOTREACHED */
}
/*
* Idle
*/
void
machine_idle(void)
{
cpu_idle();
}
/*
* Machine-dependent startup code
*/
void
machine_init(void)
{
cpu_init();
#ifdef CONFIG_GDB
gdb_init();
#endif
page_setup();
interrupt_init();
}