225 lines
5.6 KiB
ArmAsm
225 lines
5.6 KiB
ArmAsm
/* $FreeBSD$ */
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/* $NetBSD: locore.S,v 1.24 2000/05/31 05:09:17 thorpej Exp $ */
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/*
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* Copyright (C) 2001 Benno Rice
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (C) 1995, 1996 Wolfgang Solfrank.
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* Copyright (C) 1995, 1996 TooLs GmbH.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "opt_ddb.h"
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#include "opt_ipkdb.h"
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#include "assym.s"
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#include <sys/syscall.h>
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#include <machine/trap.h>
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#include <machine/param.h>
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#include <machine/sr.h>
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#include <machine/spr.h>
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#include <machine/psl.h>
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#include <machine/asm.h>
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/*
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* Some instructions gas doesn't understand (yet?)
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*/
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#define bdneq bdnzf 2,
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/*
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* Globals
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*/
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.data
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GLOBAL(tmpstk)
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.space 8208
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GLOBAL(esym)
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.long 0 /* end of symbol table */
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GLOBAL(ofmsr)
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.long 0 /* msr used in Open Firmware */
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GLOBAL(powersave)
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.long 0
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#define INTSTK 8192 /* 8K interrupt stack */
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#define SPILLSTK 4096 /* 4K spill stack */
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/*
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* Dummy interrupt table to keep sysctl happy until
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* it's worked out what to do with naming
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*/
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GLOBAL(intrnames)
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.asciz "dummy"
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GLOBAL(eintrnames)
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.align 4
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GLOBAL(intrcnt)
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.long 0
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GLOBAL(eintrcnt)
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/*
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* File-scope for locore.S
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*/
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idle_u:
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.long 0 /* fake uarea during idle after exit */
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openfirmware_entry:
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.long 0 /* openfirmware entry point */
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srsave:
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.long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
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/*
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* This symbol is here for the benefit of kvm_mkdb, and is supposed to
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* mark the start of kernel text.
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*/
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.text
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.globl kernel_text
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kernel_text:
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/*
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* Startup entry. Note, this must be the first thing in the text
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* segment!
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*/
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.text
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.globl __start
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__start:
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#ifdef FIRMWORKSBUGS
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mfmsr 0
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andi. 0,0,PSL_IR|PSL_DR
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beq 1f
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bl ofwr_init
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1:
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#endif
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li 8,0
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li 9,0x100
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mtctr 9
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1:
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dcbf 0,8
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icbi 0,8
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addi 8,8,0x20
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bdnz 1b
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sync
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isync
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mtibatu 0,0
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mtibatu 1,0
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mtibatu 2,0
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mtibatu 3,0
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mtdbatu 0,0
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mtdbatu 1,0
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mtdbatu 2,0
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mtdbatu 3,0
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li 9,0x12
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mtibatl 0,9
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mtdbatl 0,9
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li 9,0x1ffe
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mtibatu 0,9
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mtdbatu 0,9
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isync
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/* Save the argument pointer and length */
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mr 20,6
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mr 21,7
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lis 8,openfirmware_entry@ha
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stw 5,openfirmware_entry@l(8) /* save client interface handler */
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mr 3,5
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lis 1,tmpstk@ha
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addi 1,1,tmpstk@l
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addi 1,1,8192
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mfmsr 0
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lis 9,ofmsr@ha
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stw 0,ofmsr@l(9)
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bl OF_init
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lis 4,end@ha
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addi 4,4,end@l
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mr 5,4
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lis 3,kernel_text@ha
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addi 3,3,kernel_text@l
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/* Restore the argument pointer and length */
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mr 6,20
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mr 7,21
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bl powerpc_init
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bl mi_startup
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b OF_exit
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/*
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* int setfault()
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*
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* Similar to setjmp to setup for handling faults on accesses to user memory.
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* Any routine using this may only call bcopy, either the form below,
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* or the (currently used) C code optimized, so it doesn't use any non-volatile
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* registers.
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*/
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.globl setfault
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setfault:
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mflr 0
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mfcr 12
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mfsprg 4,0
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lwz 4,PC_CURTHREAD(4)
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lwz 4,TD_PCB(4)
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stw 3,PCB_ONFAULT(4)
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stw 0,0(3)
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stw 1,4(3)
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stw 2,8(3)
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stmw 12,12(3)
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xor 3,3,3
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blr
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#include <powerpc/powerpc/trap_subr.S>
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