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pmppc_locore.S revision 1.11 
      1 /*	$NetBSD: pmppc_locore.S,v 1.11 2011/06/20 19:56:11 matt Exp $	*/
      2 /*	$OpenBSD: locore.S,v 1.4 1997/01/26 09:06:38 rahnds Exp $	*/
      3 
      4 /*
      5  * Copyright (C) 1995, 1996 Wolfgang Solfrank.
      6  * Copyright (C) 1995, 1996 TooLs GmbH.
      7  * All rights reserved.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *	This product includes software developed by TooLs GmbH.
     20  * 4. The name of TooLs GmbH may not be used to endorse or promote products
     21  *    derived from this software without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
     24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     26  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     27  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     28  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     29  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     30  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     31  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     32  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     33  */
     34 
     35 #include "opt_ddb.h"
     36 #include "opt_kgdb.h"
     37 #include "opt_ipkdb.h"
     38 #include "opt_multiprocessor.h"
     39 #include "opt_openpic.h"
     40 #include "opt_ppcparam.h"
     41 #include "assym.h"
     42 
     43 #include <sys/syscall.h>
     44 
     45 #include <machine/param.h>
     46 #include <machine/psl.h>
     47 #include <machine/trap.h>
     48 #include <machine/asm.h>
     49 
     50 #include <powerpc/spr.h>
     51 #include <powerpc/oea/spr.h>
     52 #include <powerpc/oea/hid.h>
     53 
     54 #include "ksyms.h"
     55 
     56 /*
     57  * Some instructions gas doesn't understand (yet?)
     58  */
     59 #define	bdneq	bdnzf 2,
     60 
     61 /*
     62  * Globals
     63  */
     64 GLOBAL(startsym)
     65 	.long	0			/* start symbol table */
     66 GLOBAL(endsym)
     67 	.long	0			/* end symbol table */
     68 GLOBAL(oeacpufeat)
     69 	.long	0			/* cpu features */
     70 /*
     71  * This symbol is here for the benefit of kvm_mkdb, and is supposed to
     72  * mark the start of kernel text.
     73  */
     74 	.text
     75 	.globl	_C_LABEL(kernel_text)
     76 _C_LABEL(kernel_text):
     77 
     78 /*
     79  * Startup entry.  Note, this must be the first thing in the text
     80  * segment!
     81  */
     82 	.text
     83 	.globl	__start
     84 __start:
     85 	li	0,0
     86 	mtmsr	0			/* Disable FPU/MMU/exceptions */
     87 	isync
     88 
     89 	/* Enable data and instruction caches */
     90 /*
     91 	mfspr	8,1008
     92 	ori	8, 8, (HID0_ICE | HID0_DCE)@l
     93 	mtspr	1008,8
     94 */
     95 
     96 /* compute end of kernel memory */
     97 	lis	4,_C_LABEL(end)@ha
     98 	addi	4,4,_C_LABEL(end)@l
     99 
    100 	INIT_CPUINFO(4,1,9,5)
    101 
    102 	lis	3,__start@ha
    103 	addi	3,3,__start@l
    104 
    105 	xor	5,5,5
    106 	xor	6,6,6
    107 	bl	_C_LABEL(initppc)
    108 
    109 	sync
    110 	isync
    111 	mfspr	8,SPR_HID0
    112 	ori	8, 8, (HID0_ICE | HID0_DCE)@l
    113 	isync
    114 	mtspr	SPR_HID0,8
    115 	sync
    116 	isync
    117 
    118 	bl	_C_LABEL(main)
    119 
    120 loop:	b	loop			/* XXX not reached */
    121 
    122 	.globl	_C_LABEL(enable_intr)
    123 _C_LABEL(enable_intr):
    124 	mfmsr	3
    125 	ori	3,3,PSL_EE@l
    126 	mtmsr	3
    127 	blr
    128 
    129 	.globl	_C_LABEL(disable_intr)
    130 _C_LABEL(disable_intr):
    131 	mfmsr	3
    132 	andi.	3,3,~PSL_EE@l
    133 	mtmsr	3
    134 	blr
    135 
    136 /*
    137  * Include common switch / setfault code
    138  */
    139 #include <powerpc/powerpc/locore_subr.S>
    140 
    141 /*
    142  * Include common trap / exception code
    143  */
    144 #include <powerpc/powerpc/trap_subr.S>
    145 
    146 /*
    147  * Include PIO routines
    148  */
    149 #include <powerpc/powerpc/pio_subr.S>
    150