/* * (C) Copyright 2000-2010 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * * (C) Copyright 2001 Sysgo Real-Time Solutions, GmbH <www.elinos.com> * Andreas Heppel <aheppel@sysgo.de> * SPDX-License-Identifier: GPL-2.0+ */ /* #define DEBUG */ #include <common.h> #include <command.h> #include <environment.h> #include <linux/stddef.h> #include <malloc.h> #include <search.h> #include <errno.h> DECLARE_GLOBAL_DATA_PTR; #if defined(CONFIG_CMD_SAVEENV) && defined(CONFIG_CMD_FLASH) #define CMD_SAVEENV #elif defined(CONFIG_ENV_ADDR_REDUND) #error CONFIG_ENV_ADDR_REDUND must have CONFIG_CMD_SAVEENV & CONFIG_CMD_FLASH #endif #if defined(CONFIG_ENV_SIZE_REDUND) && \ (CONFIG_ENV_SIZE_REDUND < CONFIG_ENV_SIZE) #error CONFIG_ENV_SIZE_REDUND should not be less then CONFIG_ENV_SIZE #endif char *env_name_spec = "Flash"; #ifdef ENV_IS_EMBEDDED env_t *env_ptr = &environment; static env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR; #else /* ! ENV_IS_EMBEDDED */ env_t *env_ptr = (env_t *)CONFIG_ENV_ADDR; static env_t *flash_addr = (env_t *)CONFIG_ENV_ADDR; #endif /* ENV_IS_EMBEDDED */ #if defined(CMD_SAVEENV) || defined(CONFIG_ENV_ADDR_REDUND) /* CONFIG_ENV_ADDR is supposed to be on sector boundary */ static ulong end_addr = CONFIG_ENV_ADDR + CONFIG_ENV_SECT_SIZE - 1; #endif #ifdef CONFIG_ENV_ADDR_REDUND static env_t *flash_addr_new = (env_t *)CONFIG_ENV_ADDR_REDUND; /* CONFIG_ENV_ADDR_REDUND is supposed to be on sector boundary */ static ulong end_addr_new = CONFIG_ENV_ADDR_REDUND + CONFIG_ENV_SECT_SIZE - 1; #endif /* CONFIG_ENV_ADDR_REDUND */ #ifdef CONFIG_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) { env_t env_new; char *saved_data = NULL; char flag = OBSOLETE_FLAG, new_flag = ACTIVE_FLAG; int rc = 1; #if CONFIG_ENV_SECT_SIZE > CONFIG_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; rc = env_export(&env_new); if (rc) return rc; env_new.flags = new_flag; #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE up_data = end_addr_new + 1 - ((long)flash_addr_new + CONFIG_ENV_SIZE); debug("Data to save 0x%lX\n", up_data); if (up_data) { saved_data = malloc(up_data); if (saved_data == NULL) { printf("Unable to save the rest of sector (%ld)\n", up_data); goto done; } memcpy(saved_data, (void *)((long)flash_addr_new + CONFIG_ENV_SIZE), up_data); debug("Data (start 0x%lX, len 0x%lX) saved at 0x%p\n", (long)flash_addr_new + CONFIG_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)); rc = flash_write((char *)&env_new, (ulong)flash_addr_new, sizeof(env_new)); if (rc) goto perror; rc = flash_write(&flag, (ulong)&(flash_addr->flags), sizeof(flash_addr->flags)); if (rc) goto perror; #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE if (up_data) { /* restore the rest of sector */ debug("Restoring the rest of data to 0x%lX len 0x%lX\n", (long)flash_addr_new + CONFIG_ENV_SIZE, up_data); if (flash_write(saved_data, (long)flash_addr_new + CONFIG_ENV_SIZE, up_data)) goto perror; } #endif puts("done\n"); { 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; goto done; perror: flash_perror(rc); done: if (saved_data) free(saved_data); /* try to re-protect */ flash_sect_protect(1, (ulong)flash_addr, end_addr); flash_sect_protect(1, (ulong)flash_addr_new, end_addr_new); return rc; } #endif /* CMD_SAVEENV */ #else /* ! CONFIG_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) { env_t env_new; int rc = 1; char *saved_data = NULL; #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE ulong up_data = 0; up_data = end_addr + 1 - ((long)flash_addr + CONFIG_ENV_SIZE); debug("Data to save 0x%lx\n", up_data); if (up_data) { saved_data = malloc(up_data); if (saved_data == NULL) { printf("Unable to save the rest of sector (%ld)\n", up_data); goto done; } memcpy(saved_data, (void *)((long)flash_addr + CONFIG_ENV_SIZE), up_data); debug("Data (start 0x%lx, len 0x%lx) saved at 0x%lx\n", (ulong)flash_addr + CONFIG_ENV_SIZE, up_data, (ulong)saved_data); } #endif /* CONFIG_ENV_SECT_SIZE */ debug("Protect off %08lX ... %08lX\n", (ulong)flash_addr, end_addr); if (flash_sect_protect(0, (long)flash_addr, end_addr)) goto done; rc = env_export(&env_new); if (rc) goto done; puts("Erasing Flash..."); if (flash_sect_erase((long)flash_addr, end_addr)) goto done; puts("Writing to Flash... "); rc = flash_write((char *)&env_new, (long)flash_addr, CONFIG_ENV_SIZE); if (rc != 0) goto perror; #if CONFIG_ENV_SECT_SIZE > CONFIG_ENV_SIZE if (up_data) { /* restore the rest of sector */ debug("Restoring the rest of data to 0x%lx len 0x%lx\n", (ulong)flash_addr + CONFIG_ENV_SIZE, up_data); if (flash_write(saved_data, (long)flash_addr + CONFIG_ENV_SIZE, up_data)) goto perror; } #endif puts("done\n"); rc = 0; goto done; perror: flash_perror(rc); done: if (saved_data) free(saved_data); /* try to re-protect */ flash_sect_protect(1, (long)flash_addr, end_addr); return rc; } #endif /* CMD_SAVEENV */ #endif /* CONFIG_ENV_ADDR_REDUND */ void env_relocate_spec(void) { #ifdef CONFIG_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 /* CONFIG_ENV_ADDR_REDUND */ env_import((char *)flash_addr, 1); }