/* * (C) Copyright 2000-2002 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com> * Andreas Heppel <aheppel@sysgo.de> * 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 */ /* #define DEBUG */ #include <common.h> #if defined(CFG_ENV_IS_IN_FLASH) /* Environment is in Flash */ #include <command.h> #include <environment.h> #include <linux/stddef.h> #include <malloc.h> DECLARE_GLOBAL_DATA_PTR; #if defined(CONFIG_CMD_ENV) && defined(CONFIG_CMD_FLASH) #define CMD_SAVEENV #elif defined(CFG_ENV_ADDR_REDUND) #error Cannot use CFG_ENV_ADDR_REDUND without CONFIG_CMD_ENV & CONFIG_CMD_FLASH #endif #if defined(CFG_ENV_SIZE_REDUND) && (CFG_ENV_SIZE_REDUND < CFG_ENV_SIZE) #error CFG_ENV_SIZE_REDUND should not be less then CFG_ENV_SIZE #endif #ifdef CONFIG_INFERNO # ifdef CFG_ENV_ADDR_REDUND #error CFG_ENV_ADDR_REDUND is not implemented for CONFIG_INFERNO # endif #endif char * env_name_spec = "Flash"; #ifdef ENV_IS_EMBEDDED extern uchar environment[]; env_t *env_ptr = (env_t *)(&environment[0]); #ifdef CMD_SAVEENV /* static env_t *flash_addr = (env_t *)(&environment[0]);-broken on ARM-wd-*/ static env_t *flash_addr = (env_t *)CFG_ENV_ADDR; #endif #else /* ! ENV_IS_EMBEDDED */ env_t *env_ptr = (env_t *)CFG_ENV_ADDR; #ifdef CMD_SAVEENV static env_t *flash_addr = (env_t *)CFG_ENV_ADDR; #endif #endif /* ENV_IS_EMBEDDED */ #ifdef CFG_ENV_ADDR_REDUND static env_t *flash_addr_new = (env_t *)CFG_ENV_ADDR_REDUND; /* CFG_ENV_ADDR is supposed to be on sector boundary */ static ulong end_addr = CFG_ENV_ADDR + CFG_ENV_SECT_SIZE - 1; static ulong end_addr_new = CFG_ENV_ADDR_REDUND + CFG_ENV_SECT_SIZE - 1; #define ACTIVE_FLAG 1 #define OBSOLETE_FLAG 0 #endif /* CFG_ENV_ADDR_REDUND */ extern uchar default_environment[]; extern int default_environment_size; uchar env_get_char_spec (int index) { return ( *((uchar *)(gd->env_addr + index)) ); } #ifdef CFG_ENV_ADDR_REDUND int env_init(void) { int crc1_ok = 0, crc2_ok = 0; uchar flag1 = flash_addr->flags; uchar flag2 = flash_addr_new->flags; ulong addr_default = (ulong)&default_environment[0]; ulong addr1 = (ulong)&(flash_addr->data); ulong addr2 = (ulong)&(flash_addr_new->data); crc1_ok = (crc32(0, flash_addr->data, ENV_SIZE) == flash_addr->crc); crc2_ok = (crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc); if (crc1_ok && ! crc2_ok) { gd->env_addr = addr1; gd->env_valid = 1; } else if (! crc1_ok && crc2_ok) { gd->env_addr = addr2; gd->env_valid = 1; } else if (! crc1_ok && ! crc2_ok) { gd->env_addr = addr_default; gd->env_valid = 0; } else if (flag1 == ACTIVE_FLAG && flag2 == OBSOLETE_FLAG) { gd->env_addr = addr1; gd->env_valid = 1; } else if (flag1 == OBSOLETE_FLAG && flag2 == ACTIVE_FLAG) { gd->env_addr = addr2; gd->env_valid = 1; } else if (flag1 == flag2) { gd->env_addr = addr1; gd->env_valid = 2; } else if (flag1 == 0xFF) { gd->env_addr = addr1; gd->env_valid = 2; } else if (flag2 == 0xFF) { gd->env_addr = addr2; gd->env_valid = 2; } return (0); } #ifdef CMD_SAVEENV int saveenv(void) { char *saved_data = NULL; int rc = 1; char flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG; #if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE ulong up_data = 0; #endif debug ("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr); if (flash_sect_protect (0, (ulong)flash_addr, end_addr)) { goto Done; } debug ("Protect off %08lX ... %08lX\n", (ulong)flash_addr_new, end_addr_new); if (flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new)) { goto Done; } #if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE up_data = (end_addr_new + 1 - ((long)flash_addr_new + CFG_ENV_SIZE)); debug ("Data to save 0x%x\n", up_data); if (up_data) { if ((saved_data = malloc(up_data)) == NULL) { printf("Unable to save the rest of sector (%ld)\n", up_data); goto Done; } memcpy(saved_data, (void *)((long)flash_addr_new + CFG_ENV_SIZE), up_data); debug ("Data (start 0x%x, len 0x%x) saved at 0x%x\n", (long)flash_addr_new + CFG_ENV_SIZE, up_data, saved_data); } #endif puts ("Erasing Flash..."); debug (" %08lX ... %08lX ...", (ulong)flash_addr_new, end_addr_new); if (flash_sect_erase ((ulong)flash_addr_new, end_addr_new)) { goto Done; } puts ("Writing to Flash... "); debug (" %08lX ... %08lX ...", (ulong)&(flash_addr_new->data), sizeof(env_ptr->data)+(ulong)&(flash_addr_new->data)); if ((rc = flash_write((char *)env_ptr->data, (ulong)&(flash_addr_new->data), sizeof(env_ptr->data))) || (rc = flash_write((char *)&(env_ptr->crc), (ulong)&(flash_addr_new->crc), sizeof(env_ptr->crc))) || (rc = flash_write(&flag, (ulong)&(flash_addr->flags), sizeof(flash_addr->flags))) || (rc = flash_write(&new_flag, (ulong)&(flash_addr_new->flags), sizeof(flash_addr_new->flags)))) { flash_perror (rc); goto Done; } puts ("done\n"); #if CFG_ENV_SECT_SIZE > CFG_ENV_SIZE if (up_data) { /* restore the rest of sector */ debug ("Restoring the rest of data to 0x%x len 0x%x\n", (long)flash_addr_new + CFG_ENV_SIZE, up_data); if (flash_write(saved_data, (long)flash_addr_new + CFG_ENV_SIZE, up_data)) { flash_perror(rc); goto Done; } } #endif { env_t * etmp = flash_addr; ulong ltmp = end_addr; flash_addr = flash_addr_new; flash_addr_new = etmp; end_addr = end_addr_new; end_addr_new = ltmp; } rc = 0; Done: if (saved_data) free (saved_data); /* try to re-protect */ (void) flash_sect_protect (1, (ulong)flash_addr, end_addr); (void) flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new); return rc; } #endif /* CMD_SAVEENV */ #else /* ! CFG_ENV_ADDR_REDUND */ int env_init(void) { if (crc32(0, env_ptr->data, ENV_SIZE) == env_ptr->crc) { gd->env_addr = (ulong)&(env_ptr->data); gd->env_valid = 1; return(0); } gd->env_addr = (ulong)&default_environment[0]; gd->env_valid = 0; return (0); } #ifdef CMD_SAVEENV int saveenv(void) { int len, rc; ulong end_addr; ulong flash_sect_addr; #if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE) ulong flash_offset; uchar env_buffer[CFG_ENV_SECT_SIZE]; #else uchar *env_buffer = (uchar *)env_ptr; #endif /* CFG_ENV_SECT_SIZE */ int rcode = 0; #if defined(CFG_ENV_SECT_SIZE) && (CFG_ENV_SECT_SIZE > CFG_ENV_SIZE) flash_offset = ((ulong)flash_addr) & (CFG_ENV_SECT_SIZE-1); flash_sect_addr = ((ulong)flash_addr) & ~(CFG_ENV_SECT_SIZE-1); debug ( "copy old content: " "sect_addr: %08lX env_addr: %08lX offset: %08lX\n", flash_sect_addr, (ulong)flash_addr, flash_offset); /* copy old contents to temporary buffer */ memcpy (env_buffer, (void *)flash_sect_addr, CFG_ENV_SECT_SIZE); /* copy current environment to temporary buffer */ memcpy ((uchar *)((unsigned long)env_buffer + flash_offset), env_ptr, CFG_ENV_SIZE); len = CFG_ENV_SECT_SIZE; #else flash_sect_addr = (ulong)flash_addr; len = CFG_ENV_SIZE; #endif /* CFG_ENV_SECT_SIZE */ #ifndef CONFIG_INFERNO end_addr = flash_sect_addr + len - 1; #else /* this is the last sector, and the size is hardcoded here */ /* otherwise we will get stack problems on loading 128 KB environment */ end_addr = flash_sect_addr + 0x20000 - 1; #endif debug ("Protect off %08lX ... %08lX\n", (ulong)flash_sect_addr, end_addr); if (flash_sect_protect (0, flash_sect_addr, end_addr)) return 1; puts ("Erasing Flash..."); if (flash_sect_erase (flash_sect_addr, end_addr)) return 1; puts ("Writing to Flash... "); rc = flash_write((char *)env_buffer, flash_sect_addr, len); if (rc != 0) { flash_perror (rc); rcode = 1; } else { puts ("done\n"); } /* try to re-protect */ (void) flash_sect_protect (1, flash_sect_addr, end_addr); return rcode; } #endif /* CMD_SAVEENV */ #endif /* CFG_ENV_ADDR_REDUND */ void env_relocate_spec (void) { #if !defined(ENV_IS_EMBEDDED) || defined(CFG_ENV_ADDR_REDUND) #ifdef CFG_ENV_ADDR_REDUND if (gd->env_addr != (ulong)&(flash_addr->data)) { env_t * etmp = flash_addr; ulong ltmp = end_addr; flash_addr = flash_addr_new; flash_addr_new = etmp; end_addr = end_addr_new; end_addr_new = ltmp; } if (flash_addr_new->flags != OBSOLETE_FLAG && crc32(0, flash_addr_new->data, ENV_SIZE) == flash_addr_new->crc) { char flag = OBSOLETE_FLAG; gd->env_valid = 2; flash_sect_protect (0, (ulong)flash_addr_new, end_addr_new); flash_write(&flag, (ulong)&(flash_addr_new->flags), sizeof(flash_addr_new->flags)); flash_sect_protect (1, (ulong)flash_addr_new, end_addr_new); } if (flash_addr->flags != ACTIVE_FLAG && (flash_addr->flags & ACTIVE_FLAG) == ACTIVE_FLAG) { char flag = ACTIVE_FLAG; gd->env_valid = 2; flash_sect_protect (0, (ulong)flash_addr, end_addr); flash_write(&flag, (ulong)&(flash_addr->flags), sizeof(flash_addr->flags)); flash_sect_protect (1, (ulong)flash_addr, end_addr); } if (gd->env_valid == 2) puts ("*** Warning - some problems detected " "reading environment; recovered successfully\n\n"); #endif /* CFG_ENV_ADDR_REDUND */ memcpy (env_ptr, (void*)flash_addr, CFG_ENV_SIZE); #endif /* ! ENV_IS_EMBEDDED || CFG_ENV_ADDR_REDUND */ } #endif /* CFG_ENV_IS_IN_FLASH */