/* * arch/score/kernel/head.S * * Score Processor version. * * Copyright (C) 2009 Sunplus Core Technology Co., Ltd. *  Chen Liqin <liqin.chen@sunplusct.com> *  Lennox Wu <lennox.wu@sunplusct.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see the file COPYING, or write * to the Free Software Foundation, Inc., * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA */#include <linux/init.h>#include <linux/linkage.h> #include <asm/asm-offsets.h> 	.extern start_kernel	.global init_thread_union	.global	kernelsp __INITENTRY(_stext)	la	r30, __bss_start	/* initialize BSS segment. */	la	r31, _end	xor	r8, r8, r8 1:	cmp.c	r31, r30	beq	2f 	sw	r8, [r30]		/* clean memory. */	addi	r30, 4	b	1b 2:	la	r28, init_thread_union	/* set kernel stack. */	mv	r0, r28	addi	r0, KERNEL_STACK_SIZE - 32	la	r30, kernelsp	sw	r0, [r30]	subi	r0, 4*4	xor	r30, r30, r30	ori	r30, 0x02		/* enable MMU. */	mtcr	r30, cr4	nop	nop	nop	nop	nop	nop	nop 	/* there is no parameter */	xor	r4, r4, r4	xor	r5, r5, r5	xor	r6, r6, r6	xor	r7, r7, r7	la	r30, start_kernel	/* jump to init_arch */	br	r30