1 files changed, 70 insertions, 0 deletions
diff --git a/arch/score/kernel/head.S b/arch/score/kernel/head.S
new file mode 100644
index 0000000..22a7e3c
--- /dev/null
+++ b/arch/score/kernel/head.S
@@ -0,0 +1,70 @@
+/*
+ * 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
+
+__INIT
+ENTRY(_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