diff options
Diffstat (limited to 'chip/stm32/flash-stm32f0.c')
| -rw-r--r-- | chip/stm32/flash-stm32f0.c | 173 |
1 files changed, 0 insertions, 173 deletions
diff --git a/chip/stm32/flash-stm32f0.c b/chip/stm32/flash-stm32f0.c deleted file mode 100644 index f790a657c8..0000000000 --- a/chip/stm32/flash-stm32f0.c +++ /dev/null @@ -1,173 +0,0 @@ -/* Copyright 2014 The Chromium OS Authors. All rights reserved. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - */ - -/* Flash memory module for Chrome EC */ - -#include "common.h" -#include "flash.h" -#include "registers.h" -#include "util.h" - -/*****************************************************************************/ -/* Physical layer APIs */ - -int crec_flash_physical_get_protect(int block) -{ - return !(STM32_FLASH_WRPR & BIT(block)); -} - -/* - * Note: This does not need to update _NOW flags, as get_protect_flags - * in common code already does so. - */ -uint32_t crec_flash_physical_get_protect_flags(void) -{ - uint32_t flags = 0; - uint32_t wrp01 = REG32(STM32_OPTB_BASE + STM32_OPTB_WRP01); -#if CONFIG_FLASH_SIZE_BYTES > 64 * 1024 - uint32_t wrp23 = REG32(STM32_OPTB_BASE + STM32_OPTB_WRP23); -#endif - - /* - * We only need to return detailed flags if we want to protect RW or - * ROLLBACK independently (EC_FLASH_PROTECT_RO_AT_BOOT should be set - * by pstate logic). - */ -#if defined(CONFIG_FLASH_PROTECT_RW) || defined(CONFIG_ROLLBACK) - /* Flags that must be set for each region. */ - const int mask_flags[] = { - [FLASH_REGION_RW] = EC_FLASH_PROTECT_RW_AT_BOOT, - [FLASH_REGION_RO] = EC_FLASH_PROTECT_RO_AT_BOOT, -#ifdef CONFIG_ROLLBACK - [FLASH_REGION_ROLLBACK] = EC_FLASH_PROTECT_ROLLBACK_AT_BOOT, -#endif - }; - - /* - * Sets up required mask for wrp01/23 registers: for protection to be - * set, values set in the mask must be zeros, values in the mask << 8 - * must be ones. - * - * Note that these masks are actually static, and could be precomputed - * at build time to save flash space. - */ - uint32_t wrp_mask[FLASH_REGION_COUNT][2]; - int i; - int shift = 0; - int reg = 0; - - memset(wrp_mask, 0, sizeof(wrp_mask)); - - /* Scan flash protection */ - for (i = 0; i < PHYSICAL_BANKS; i++) { - /* Default: RW. */ - int region = FLASH_REGION_RW; - - if (i >= WP_BANK_OFFSET && - i < WP_BANK_OFFSET + WP_BANK_COUNT) - region = FLASH_REGION_RO; -#ifdef CONFIG_ROLLBACK - if (i >= ROLLBACK_BANK_OFFSET && - i < ROLLBACK_BANK_OFFSET + ROLLBACK_BANK_COUNT) - region = FLASH_REGION_ROLLBACK; -#endif - - switch (i) { - case 8: -#if CONFIG_FLASH_SIZE_BYTES > 64 * 1024 - case 24: -#endif - shift += 8; - break; -#if CONFIG_FLASH_SIZE_BYTES > 64 * 1024 - case 16: - reg = 1; - shift = 0; - break; -#endif - } - - wrp_mask[region][reg] |= 1 << shift; - shift++; - } - - for (i = 0; i < FLASH_REGION_COUNT; i++) { - if (!(wrp01 & wrp_mask[i][0]) && - (wrp01 & wrp_mask[i][0] << 8) == (wrp_mask[i][0] << 8)) -#if CONFIG_FLASH_SIZE_BYTES > 64 * 1024 - if (!(wrp23 & wrp_mask[i][1]) && - (wrp23 & wrp_mask[i][1] << 8) == - (wrp_mask[i][1] << 8)) -#endif - flags |= mask_flags[i]; - } -#endif /* CONFIG_FLASH_PROTECT_RW || CONFIG_ROLLBACK */ - - if (wrp01 == 0xff00ff00) -#if CONFIG_FLASH_SIZE_BYTES > 64 * 1024 - if (wrp23 == 0xff00ff00) -#endif - flags |= EC_FLASH_PROTECT_ALL_AT_BOOT; - - return flags; -} - -int crec_flash_physical_protect_now(int all) -{ - return EC_ERROR_INVAL; -} - -int crec_flash_physical_restore_state(void) -{ - /* Nothing to restore */ - return 0; -} - -uint32_t crec_flash_physical_get_valid_flags(void) -{ - return EC_FLASH_PROTECT_RO_AT_BOOT | - EC_FLASH_PROTECT_RO_NOW | -#ifdef CONFIG_FLASH_PROTECT_RW - EC_FLASH_PROTECT_RW_AT_BOOT | - EC_FLASH_PROTECT_RW_NOW | -#endif -#ifdef CONFIG_ROLLBACK - EC_FLASH_PROTECT_ROLLBACK_AT_BOOT | - EC_FLASH_PROTECT_ROLLBACK_NOW | -#endif - EC_FLASH_PROTECT_ALL_AT_BOOT | - EC_FLASH_PROTECT_ALL_NOW; -} - -uint32_t crec_flash_physical_get_writable_flags(uint32_t cur_flags) -{ - uint32_t ret = 0; - - /* If RO protection isn't enabled, its at-boot state can be changed. */ - if (!(cur_flags & EC_FLASH_PROTECT_RO_NOW)) - ret |= EC_FLASH_PROTECT_RO_AT_BOOT; - - /* - * ALL/RW at-boot state can be set if WP GPIO is asserted and can always - * be cleared. - */ - if (cur_flags & (EC_FLASH_PROTECT_ALL_AT_BOOT | - EC_FLASH_PROTECT_GPIO_ASSERTED)) - ret |= EC_FLASH_PROTECT_ALL_AT_BOOT; - -#ifdef CONFIG_FLASH_PROTECT_RW - if (cur_flags & (EC_FLASH_PROTECT_RW_AT_BOOT | - EC_FLASH_PROTECT_GPIO_ASSERTED)) - ret |= EC_FLASH_PROTECT_RW_AT_BOOT; -#endif - -#ifdef CONFIG_ROLLBACK - if (cur_flags & (EC_FLASH_PROTECT_ROLLBACK_AT_BOOT | - EC_FLASH_PROTECT_GPIO_ASSERTED)) - ret |= EC_FLASH_PROTECT_ROLLBACK_AT_BOOT; -#endif - - return ret; -} |