freebsd-dev/sys/powerpc/aim/locore.S

/* $FreeBSD$ */
/* $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 */

/*
 * 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

	mtibatu	0,0
	mtibatu	1,0
	mtibatu	2,0
	mtibatu	3,0
	mtdbatu	0,0
	mtdbatu	1,0
	mtdbatu	2,0
	mtdbatu	3,0

	li	9,0x12
	mtibatl	0,9
	mtdbatl	0,9
	li	9,0x1ffe
	mtibatu	0,9
	mtdbatu	0,9
	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>