305 lines
6.1 KiB
ArmAsm
305 lines
6.1 KiB
ArmAsm
/* $NetBSD: ev64260_locore.S,v 1.6 2003/07/31 07:50:05 matt Exp $ */
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/* $OpenBSD: locore.S,v 1.4 1997/01/26 09:06:38 rahnds Exp $ */
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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 "fs_kernfs.h"
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#include "opt_ppcparam.h"
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#include "opt_ipkdb.h"
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#include "opt_multiprocessor.h"
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#include "opt_openpic.h"
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#include "assym.h"
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#include <sys/syscall.h>
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#include <machine/param.h>
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#include <machine/vmparam.h>
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#include <machine/pmap.h>
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#include <machine/psl.h>
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#include <machine/trap.h>
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#define _NOREGNAMES
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#include <machine/asm.h>
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#include <powerpc/spr.h>
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#include <powerpc/oea/bat.h>
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#include <powerpc/oea/hid.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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GLOBAL(startsym)
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.long 0 /* start symbol table */
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GLOBAL(endsym)
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.long 0 /* end symbol table */
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GLOBAL(proc0paddr)
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.long 0 /* proc0 p_addr */
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GLOBAL(intrnames)
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GLOBAL(eintrnames)
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GLOBAL(intrcnt)
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GLOBAL(eintrcnt)
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.long 0 /* vmstat needs these. XXX */
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/*
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* File-scope for locore.S
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*/
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#ifdef DINK
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.data
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dink_return:
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.long 0 /* fake uarea during idle after exit */
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dink_stack:
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.long 0 /* fake uarea during idle after exit */
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#endif
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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 _C_LABEL(kernel_text)
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_C_LABEL(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 DINK
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mflr 0
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lis 8, dink_stack@ha
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stw 1, dink_stack@l(8)
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lis 8, dink_return@ha
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stw 0, dink_return@l(8)
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#endif
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#if 0
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eieio; sync
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lis 8, 0xf100f104@ha
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lwz 7, -3836(8)
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li 0, 1
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andc 7,7,0
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stw 7, -3836(8)
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eieio; sync
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#endif
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/*
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* Make sure that .bss is zeroed.
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*/
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li 0,0
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lis 8,edata@ha
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addi 8,8,edata@l
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lis 9,end@ha
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addi 9,9,end@l
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5: cmpw 0,8,9 /* edata & end are >= word aligned */
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bge 6f
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stw 0,0(8)
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addi 8,8,4
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b 5b
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6:
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li 0,0
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mtmsr 0 /* Disable FPU/MMU/exceptions */
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sync ; isync
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#if 1
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mfpvr 0
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srwi 0,0,16
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cmplwi 0,MPC7410
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bne 16f
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#if 0
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/* flush and disable L2 */
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mfspr 8,SPR_L2CR
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lis 0,(L2CR_L2E|L2CR_L2WT)@h /* disable the L2 mode */
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andc 8,8,0
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ori 8,8,L2CR_L2HWF /* enable hardware flush */
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sync
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mtspr SPR_L2CR,8 /* do it */
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sync /* wait for it to finish */
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/* Disable data lock mode */
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mfspr 8,SPR_HID0
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li 0,HID0_DLOCK
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andc 8,8,0
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mtspr SPR_HID0,8
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sync
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#endif
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#if 0
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/*
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* Flush the L1 cache
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*/
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mfspr 8,SPR_MSSCR0
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oris 8,8,MSSCR0_DL1HWF@h
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sync
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mtspr SPR_MSSCR0,8
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sync
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#endif
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#if 1
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/* disable data and instruction caches */
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mfspr 8,SPR_HID0
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li 0,HID0_DLOCK@l
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andc 8,8,0
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sync
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mtspr SPR_HID0,8
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sync
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isync
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#endif
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7:
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#if 0
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/* disable data and instruction caches */
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mfspr 8,SPR_HID0
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li 0,(HID0_ICE|HID0_DCE)@l
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andc 8,8,0
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sync
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mtspr SPR_HID0,8
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sync
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isync
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#endif
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7:
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#if 0
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/* Enable and flush data and instruction caches */
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ori 8,8,(HID0_ICFI|HID0_ICE|HID0_DCFI|HID0_DCE)
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# ori 8,8,(HID0_ICFI|HID0_ICE)
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mtspr SPR_HID0,8
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isync
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8: sync
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mfspr 8,SPR_HID0
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andi. 0,8,(HID0_ICFI|HID0_DCFI)
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bne 8b
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#endif
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#if 0
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mfspr 8,SPR_L2CR
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oris 8,8,L2CR_L2E@h
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sync
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mtspr SPR_L2CR,8
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sync
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#endif
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16:
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#endif
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/* compute end of kernel memory */
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lis 8,_C_LABEL(end)@ha
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addi 8,8,_C_LABEL(end)@l
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#if NKSYMS || defined(DDB) || defined(LKM) || defined(KERNFS)
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lis 7,_C_LABEL(startsym)@ha
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addi 7,7,_C_LABEL(startsym)@l
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stw 3,0(7)
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lis 7,_C_LABEL(endsym)@ha
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addi 7,7,_C_LABEL(endsym)@l
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stw 4,0(7)
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/* mr 8,4 * end of symbol table */
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#endif
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mr 4,8 /* end of mem reserved for kernel */
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INIT_CPUINFO(4,1,9,0)
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lis 3,__start@ha
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addi 3,3,__start@l
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li 5,0
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li 6,0
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bl _C_LABEL(initppc)
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bl _C_LABEL(main)
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loop: b loop /* XXX not reached */
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#if 0
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.globl _C_LABEL(extintr_enable)
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_C_LABEL(extintr_enable):
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mfmsr 3
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ori 3,3,PSL_EE@l
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sync
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mtmsr 3
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blr
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.globl _C_LABEL(extintr_restore)
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_C_LABEL(extintr_restore):
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mfmsr 4
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or 3,4,3
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sync
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mtmsr 3
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blr
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.globl _C_LABEL(extintr_disable)
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_C_LABEL(extintr_disable):
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mfmsr 3
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andi. 4,3,~PSL_EE@l
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sync
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mtmsr 4
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andi. 3,3,PSL_EE@l
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blr
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.globl _C_LABEL(mvpppc_reboot)
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_C_LABEL(mvpppc_reboot):
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mfmsr 3
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ori 3,3,PSL_IP@l
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sync
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mtmsr 3
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b 0xFFF00100
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#endif
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#ifdef DINK
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.globl _C_LABEL(return_to_dink)
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_C_LABEL(return_to_dink):
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sync
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lis 4, dink_stack@ha
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lwz 1, dink_stack@l(4)
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lis 4, dink_return@ha
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lwz 5, dink_return@l(4)
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mtlr 5
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blr
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#endif
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/*
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* Include common switch / setfault code
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*/
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#include <powerpc/powerpc/locore_subr.S>
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/*
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* Include common trap / execption code
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*/
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#include <powerpc/powerpc/trap_subr.S>
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/*
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* Include PIO routines
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*/
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#include <powerpc/powerpc/pio_subr.S>
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