diff options
Diffstat (limited to 'common/env_mgdisk.c')
-rw-r--r-- | common/env_mgdisk.c | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/common/env_mgdisk.c b/common/env_mgdisk.c new file mode 100644 index 00000000000..363ee68c27e --- /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; +} |