added boot script files to repository

1 files changed, 88 insertions, 0 deletions

diff --git a/u-boot/board/eNET/eNET_start16.S b/u-boot/board/eNET/eNET_start16.S
new file mode 100644
index 0000000..77e5519
--- /dev/null
+++ b/u-boot/board/eNET/eNET_start16.S
@@ -0,0 +1,88 @@
+/*
+ * (C) Copyright 2008
+ * Graeme Russ, graeme.russ@gmail.com.
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+/*
+ * 16bit initialization code.
+ * This code have to map the area of the boot flash
+ * that is used by U-boot to its final destination.
+ */
+
+/* #include <asm/ic/sc520_defs.h> */
+
+#include "config.h"
+#include "hardware.h"
+#include <asm/ic/sc520.h>
+
+.text
+.section .start16, "ax"
+.code16
+.globl board_init16
+board_init16:
+	/* Alias MMCR to 0xdf000 */
+	movw	$0xfffc, %dx
+	movl	$0x800df0cb, %eax
+	outl	%eax, %dx
+
+	/* Set ds to point to MMCR alias */
+	movw	$0xdf00, %ax
+	movw	%ax, %ds
+
+	/* Map PAR for Boot Flash (BOOTCS, 512kB @ 0x380000000) */
+	movl    $(SC520_PAR14 - SC520_MMCR_BASE), %edi
+	movl	$CONFIG_SYS_SC520_BOOTCS_PAR, %eax
+	movl	%eax, (%di)
+
+	/* Map PAR for LED, Hex Switches (GPCS6, 20 Bytes @ 0x1000) */
+	movl    $(SC520_PAR15 - SC520_MMCR_BASE), %edi
+	movl	$CONFIG_SYS_SC520_LLIO_PAR, %eax
+	movl	%eax, (%di)
+
+	/* Disabe MMCR alias */
+	movw	$0xfffc, %dx
+	movl	$0x000000cb, %eax
+	outl	%eax, %dx
+
+	jmp	board_init16_ret
+
+.section .bios, "ax"
+.code16
+.globl realmode_reset
+.hidden realmode_reset
+.type realmode_reset, @function
+realmode_reset:
+	/* Alias MMCR to 0xdf000 */
+	movw	$0xfffc, %dx
+	movl	$0x800df0cb, %eax
+	outl	%eax, %dx
+
+	/* Set ds to point to MMCR alias */
+	movw	$0xdf00, %ax
+	movw	%ax, %ds
+
+	/* issue software reset thorugh MMCR */
+	movl    $0xd72, %edi
+	movb	$0x01, %al
+	movb	%al, (%di)
+
+1:	hlt
+	jmp	1