/* $OpenBSD: locore.S,v 1.6 2004/12/24 22:50:31 miod Exp $ */
/*
* Copyright (c) 2001-2004 Opsycon AB (www.opsycon.se / www.opsycon.com)
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*
*/
#include <sys/errno.h>
#include <sys/syscall.h>
#include <machine/param.h>
#include <machine/psl.h>
#include <machine/asm.h>
#include <machine/cpu.h>
#include <machine/regnum.h>
#include <machine/cpustate.h>
#include <machine/pte.h>
#include "assym.h"
.set noreorder # Noreorder is default style!
.globl idle_stack # idle stack just below kernel.
idle_stack:
.globl start
.globl kernel_text
kernel_text = start
start:
mfc0 v0, COP_0_STATUS_REG
li v1, ~SR_INT_ENAB
and v0, v1
mtc0 v0, COP_0_STATUS_REG # disable all interrupts
mtc0 zero, COP_0_CAUSE_REG # Clear soft interrupts
/*
* Initialize stack and call machine startup.
*/
LA sp, start - FRAMESZ(CF_SZ)
LA gp, _gp
jal mips_init # mips_init(argc, argv, envp)
sw zero, CF_RA_OFFS(sp) # Zero out old ra for debugger
move sp, v0 # switch to new stack
jal main # main(regs)
move a0, zero
PANIC("Startup failed!")