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Annotation of sys/arch/sgi/sgi/locore.S, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: locore.S,v 1.6 2004/12/24 22:50:31 miod Exp $ */
        !             2:
        !             3: /*
        !             4:  * Copyright (c) 2001-2004 Opsycon AB  (www.opsycon.se / www.opsycon.com)
        !             5:  *
        !             6:  * Redistribution and use in source and binary forms, with or without
        !             7:  * modification, are permitted provided that the following conditions
        !             8:  * are met:
        !             9:  * 1. Redistributions of source code must retain the above copyright
        !            10:  *    notice, this list of conditions and the following disclaimer.
        !            11:  * 2. Redistributions in binary form must reproduce the above copyright
        !            12:  *    notice, this list of conditions and the following disclaimer in the
        !            13:  *    documentation and/or other materials provided with the distribution.
        !            14:  *
        !            15:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
        !            16:  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
        !            17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            18:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
        !            19:  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            20:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            21:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            22:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            23:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            24:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            25:  * SUCH DAMAGE.
        !            26:  *
        !            27:  */
        !            28: #include <sys/errno.h>
        !            29: #include <sys/syscall.h>
        !            30:
        !            31: #include <machine/param.h>
        !            32: #include <machine/psl.h>
        !            33: #include <machine/asm.h>
        !            34: #include <machine/cpu.h>
        !            35: #include <machine/regnum.h>
        !            36: #include <machine/cpustate.h>
        !            37: #include <machine/pte.h>
        !            38:
        !            39: #include "assym.h"
        !            40:
        !            41:        .set    noreorder               # Noreorder is default style!
        !            42:
        !            43:        .globl  idle_stack      # idle stack just below kernel.
        !            44: idle_stack:
        !            45:
        !            46:        .globl  start
        !            47:        .globl  kernel_text
        !            48: kernel_text = start
        !            49: start:
        !            50:        mfc0    v0, COP_0_STATUS_REG
        !            51:        li      v1, ~SR_INT_ENAB
        !            52:        and     v0, v1
        !            53:        mtc0    v0, COP_0_STATUS_REG    # disable all interrupts
        !            54:
        !            55:        mtc0    zero, COP_0_CAUSE_REG   # Clear soft interrupts
        !            56:
        !            57: /*
        !            58:  * Initialize stack and call machine startup.
        !            59:  */
        !            60:        LA      sp, start - FRAMESZ(CF_SZ)
        !            61:        LA      gp, _gp
        !            62:        jal     mips_init                       # mips_init(argc, argv, envp)
        !            63:        sw      zero, CF_RA_OFFS(sp)            # Zero out old ra for debugger
        !            64:
        !            65:        move    sp, v0                          # switch to new stack
        !            66:        jal     main                            # main(regs)
        !            67:        move    a0, zero
        !            68:        PANIC("Startup failed!")