diff options
Diffstat (limited to 'chip/stm32/flash-stm32f3.c')
| -rw-r--r-- | chip/stm32/flash-stm32f3.c | 198 |
1 files changed, 0 insertions, 198 deletions
diff --git a/chip/stm32/flash-stm32f3.c b/chip/stm32/flash-stm32f3.c deleted file mode 100644 index 138e690fcc..0000000000 --- a/chip/stm32/flash-stm32f3.c +++ /dev/null @@ -1,198 +0,0 @@ -/* Copyright 2017 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 stm32f3 and stm32f4 */ - -#include <stdbool.h> -#include "common.h" -#include "flash.h" -#include "flash-f.h" -#include "flash-regs.h" -#include "hooks.h" -#include "registers.h" -#include "system.h" -#include "panic.h" - -/*****************************************************************************/ -/* Physical layer APIs */ -#ifdef CHIP_VARIANT_STM32F76X -/* - * 8 "erase" sectors : 32KB/32KB/32KB/32KB/128KB/256KB/256KB/256KB - */ -struct ec_flash_bank const flash_bank_array[] = { - { - .count = 4, - .size_exp = __fls(SIZE_32KB), - .write_size_exp = __fls(CONFIG_FLASH_WRITE_SIZE), - .erase_size_exp = __fls(SIZE_32KB), - .protect_size_exp = __fls(SIZE_32KB), - }, - { - .count = 1, - .size_exp = __fls(SIZE_128KB), - .write_size_exp = __fls(CONFIG_FLASH_WRITE_SIZE), - .erase_size_exp = __fls(SIZE_128KB), - .protect_size_exp = __fls(SIZE_128KB), - }, - { - .count = (CONFIG_FLASH_SIZE_BYTES - SIZE_256KB) / SIZE_256KB, - .write_size_exp = __fls(CONFIG_FLASH_WRITE_SIZE), - .size_exp = __fls(SIZE_256KB), - .erase_size_exp = __fls(SIZE_256KB), - .protect_size_exp = __fls(SIZE_256KB), - }, -}; -#elif defined(CHIP_FAMILY_STM32F4) -/* - * STM32F412xE has 512 KB flash - * 8 "erase" sectors (512 KB) : 16KB/16KB/16KB/16KB/64KB/128KB/128KB/128KB - * - * STM32F412xG has 1 MB flash - * 12 "erase" sectors (1024 KB) : - * 16KB/16KB/16KB/16KB/64KB/128KB/128KB/128KB/128KB/128KB/128KB/128KB - * - * https://www.st.com/resource/en/datasheet/stm32f412cg.pdf - */ -struct ec_flash_bank const flash_bank_array[] = { - { - .count = 4, - .size_exp = __fls(SIZE_16KB), - .write_size_exp = __fls(CONFIG_FLASH_WRITE_SIZE), - .erase_size_exp = __fls(SIZE_16KB), - .protect_size_exp = __fls(SIZE_16KB), - }, - { - .count = 1, - .size_exp = __fls(SIZE_64KB), - .write_size_exp = __fls(CONFIG_FLASH_WRITE_SIZE), - .erase_size_exp = __fls(SIZE_64KB), - .protect_size_exp = __fls(SIZE_64KB), - }, - { - .count = (CONFIG_FLASH_SIZE_BYTES - SIZE_128KB) / SIZE_128KB, - .write_size_exp = __fls(CONFIG_FLASH_WRITE_SIZE), - .size_exp = __fls(SIZE_128KB), - .erase_size_exp = __fls(SIZE_128KB), - .protect_size_exp = __fls(SIZE_128KB), - }, -}; -#endif - -/* Flag indicating whether we have locked down entire flash */ -static int entire_flash_locked; - -#define FLASH_SYSJUMP_TAG 0x5750 /* "WP" - Write Protect */ -#define FLASH_HOOK_VERSION 1 - -/* The previous write protect state before sys jump */ -struct flash_wp_state { - int entire_flash_locked; -}; - -/*****************************************************************************/ -/* Physical layer APIs */ - -int crec_flash_physical_get_protect(int block) -{ - return (entire_flash_locked || -#if defined(CHIP_FAMILY_STM32F3) - !(STM32_FLASH_WRPR & BIT(block)) -#elif defined(CHIP_FAMILY_STM32F4) - !(STM32_OPTB_WP & STM32_OPTB_nWRP(block)) -#endif - ); -} - -uint32_t crec_flash_physical_get_protect_flags(void) -{ - uint32_t flags = 0; - - /* Read all-protected state from our shadow copy */ - if (entire_flash_locked) - flags |= EC_FLASH_PROTECT_ALL_NOW; - -#if defined(CONFIG_FLASH_READOUT_PROTECTION_AS_PSTATE) - if (is_flash_rdp_enabled()) - flags |= EC_FLASH_PROTECT_RO_AT_BOOT; -#endif - - return flags; -} - -int crec_flash_physical_protect_now(int all) -{ - if (all) { - disable_flash_control_register(); - entire_flash_locked = 1; - - return EC_SUCCESS; - } - - disable_flash_option_bytes(); - - return EC_SUCCESS; -} - -uint32_t crec_flash_physical_get_valid_flags(void) -{ - return EC_FLASH_PROTECT_RO_AT_BOOT | - EC_FLASH_PROTECT_RO_NOW | - 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; - - /* - * If entire flash isn't protected at this boot, it can be enabled if - * the WP GPIO is asserted. - */ - if (!(cur_flags & EC_FLASH_PROTECT_ALL_NOW) && - (cur_flags & EC_FLASH_PROTECT_GPIO_ASSERTED)) - ret |= EC_FLASH_PROTECT_ALL_NOW; - - return ret; -} - -int crec_flash_physical_restore_state(void) -{ - uint32_t reset_flags = system_get_reset_flags(); - int version, size; - const struct flash_wp_state *prev; - - /* - * If we have already jumped between images, an earlier image could - * have applied write protection. Nothing additional needs to be done. - */ - if (reset_flags & EC_RESET_FLAG_SYSJUMP) { - prev = (const struct flash_wp_state *)system_get_jump_tag( - FLASH_SYSJUMP_TAG, &version, &size); - if (prev && version == FLASH_HOOK_VERSION && - size == sizeof(*prev)) - entire_flash_locked = prev->entire_flash_locked; - return 1; - } - - return 0; -} - -/*****************************************************************************/ -/* Hooks */ - -static void flash_preserve_state(void) -{ - struct flash_wp_state state; - - state.entire_flash_locked = entire_flash_locked; - - system_add_jump_tag(FLASH_SYSJUMP_TAG, FLASH_HOOK_VERSION, - sizeof(state), &state); -} -DECLARE_HOOK(HOOK_SYSJUMP, flash_preserve_state, HOOK_PRIO_DEFAULT); |