FreeBSD/Linux Kernel Cross Reference
sys/powerpc/powerpc/locore.S

     /* $FreeBSD: releng/5.2/sys/powerpc/powerpc/locore.S 109677 2003-01-22 01:47:05Z grehan $ */
     /* $NetBSD: locore.S,v 1.24 2000/05/31 05:09:17 thorpej Exp $ */
     
     /*
      * Copyright (C) 2001 Benno Rice
      * 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.
     *
     * THIS SOFTWARE IS PROVIDED BY Benno Rice ``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 TOOLS GMBH 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.
     */
    /*
     * Copyright (C) 1995, 1996 Wolfgang Solfrank.
     * Copyright (C) 1995, 1996 TooLs GmbH.
     * 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. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by TooLs GmbH.
     * 4. The name of TooLs GmbH may not be used to endorse or promote products
     *    derived from this software without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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 "opt_ddb.h"
    #include "opt_ipkdb.h"
    #include "assym.s"
    
    #include <sys/syscall.h>
    
    #include <machine/trap.h>
    #include <machine/param.h>
    #include <machine/sr.h>
    #include <machine/spr.h>
    #include <machine/psl.h>
    #include <machine/asm.h>
    
    /*
     * Some instructions gas doesn't understand (yet?)
     */
    #define bdneq   bdnzf 2,
    
    /*
     * Globals
     */
            .data
    GLOBAL(tmpstk)
            .space  8208
    GLOBAL(esym)
            .long   0                       /* end of symbol table */
    
    GLOBAL(ofmsr)
            .long   0                       /* msr used in Open Firmware */
    
    GLOBAL(powersave)
            .long   0
    
    #define INTSTK          8192            /* 8K interrupt stack */
    #define SPILLSTK        4096            /* 4K spill stack */
    
    /*
     * Dummy interrupt table to keep sysctl happy until
     * it's worked out what to do with naming
     */
    GLOBAL(intrnames)
           .asciz "dummy"
   GLOBAL(eintrnames)
           .align 4
   GLOBAL(intrcnt)
           .long 0
   GLOBAL(eintrcnt)
           
   /*
    * File-scope for locore.S
    */
   idle_u:
           .long   0                       /* fake uarea during idle after exit */
   openfirmware_entry:
           .long   0                       /* openfirmware entry point */
   srsave:
           .long   0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
   
   /*
    * This symbol is here for the benefit of kvm_mkdb, and is supposed to
    * mark the start of kernel text.
    */
           .text
           .globl  kernel_text
   kernel_text:
   
   /*
    * Startup entry.  Note, this must be the first thing in the text
    * segment!
    */
           .text
           .globl  __start
   __start:
   #ifdef  FIRMWORKSBUGS
           mfmsr   0
           andi.   0,0,PSL_IR|PSL_DR
           beq     1f
   
           bl      ofwr_init
   1:
   #endif
           li      8,0
           li      9,0x100
           mtctr   9
   1:
           dcbf    0,8
           icbi    0,8
           addi    8,8,0x20
           bdnz    1b
           sync
           isync
   
           /* Save the argument pointer and length */
           mr      20,6
           mr      21,7
   
           lis     8,openfirmware_entry@ha
           stw     5,openfirmware_entry@l(8) /* save client interface handler */
           mr      3,5
   
           lis     1,tmpstk@ha
           addi    1,1,tmpstk@l
           addi    1,1,8192
   
           mfmsr   0
           lis     9,ofmsr@ha
           stw     0,ofmsr@l(9)
   
           bl      OF_init
   
           lis     4,end@ha
           addi    4,4,end@l
           mr      5,4
   
           lis     3,kernel_text@ha
           addi    3,3,kernel_text@l
   
           /* Restore the argument pointer and length */
           mr      6,20
           mr      7,21
   
           bl      powerpc_init
           bl      mi_startup
           b       OF_exit
   
   /*
    * int setfault()
    *
    * Similar to setjmp to setup for handling faults on accesses to user memory.
    * Any routine using this may only call bcopy, either the form below,
    * or the (currently used) C code optimized, so it doesn't use any non-volatile
    * registers.
    */
           .globl  setfault
   setfault:
           mflr    0
           mfcr    12
           mfsprg  4,0
           lwz     4,PC_CURTHREAD(4)
           lwz     4,TD_PCB(4)
           stw     3,PCB_ONFAULT(4)
           stw     0,0(3)
           stw     1,4(3)
           stw     2,8(3)
           stmw    12,12(3)
           xor     3,3,3
           blr
   
   #include <powerpc/powerpc/trap_subr.S>

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