1 files changed, 92 insertions, 0 deletions
diff --git a/common/env_mgdisk.c b/common/env_mgdisk.c
new file mode 100644
index 0000000000..363ee68c27
--- /dev/null
+++ b/common/env_mgdisk.c
@@ -0,0 +1,92 @@
+/*
+ * (C) Copyright 2009 mGine co.
+ * unsik Kim <donari75@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
+ */
+
+#include <common.h>
+#include <command.h>
+#include <environment.h>
+#include <linux/stddef.h>
+#include <mg_disk.h>
+
+/* references to names in env_common.c */
+extern uchar default_environment[];
+extern int default_environment_size;
+
+char * env_name_spec = "MG_DISK";
+
+env_t *env_ptr = 0;
+
+DECLARE_GLOBAL_DATA_PTR;
+
+uchar env_get_char_spec(int index)
+{
+	return (*((uchar *) (gd->env_addr + index)));
+}
+
+void env_relocate_spec(void)
+{
+	unsigned int err;
+
+	err = mg_disk_init();
+	if (err) {
+		puts ("*** Warning - mg_disk_init error");
+		goto OUT;
+	}
+	err = mg_disk_read(CONFIG_ENV_ADDR, (u_char *)env_ptr, CONFIG_ENV_SIZE);
+	if (err) {
+		puts ("*** Warning - mg_disk_read error");
+		goto OUT;
+	}
+
+	if (crc32(0, env_ptr->data, ENV_SIZE) != env_ptr->crc) {
+		puts ("*** Warning - CRC error");
+		goto OUT;
+	}
+
+	return;
+
+OUT:
+	printf (", using default environment\n\n");
+	set_default_env();
+}
+
+int saveenv(void)
+{
+	unsigned int err;
+
+	env_ptr->crc = crc32(0, env_ptr->data, ENV_SIZE);
+	err = mg_disk_write(CONFIG_ENV_ADDR, (u_char *)env_ptr,
+			CONFIG_ENV_SIZE);
+	if (err)
+		puts ("*** Warning - mg_disk_write error\n\n");
+
+	return err;
+}
+
+int env_init(void)
+{
+	/* use default */
+	gd->env_addr = (ulong) & default_environment[0];
+	gd->env_valid = 1;
+
+	return 0;
+}