/* * SPDX-FileCopyrightText: 2020-2022 Espressif Systems (Shanghai) CO LTD * * SPDX-License-Identifier: Apache-2.0 */ /* INTERNAL API * generic interface to PMS memory protection features */ #pragma once #include #include #include "esp_attr.h" #ifdef __cplusplus extern "C" { #endif #ifndef IRAM_SRAM_START #define IRAM_SRAM_START 0x4037C000 #endif #ifndef DRAM_SRAM_START #define DRAM_SRAM_START 0x3FC7C000 #endif typedef enum { MEMPROT_NONE = 0x00000000, MEMPROT_IRAM0_SRAM = 0x00000001, MEMPROT_DRAM0_SRAM = 0x00000002, MEMPROT_ALL = 0xFFFFFFFF } mem_type_prot_t; typedef enum { MEMPROT_SPLITLINE_NONE = 0, MEMPROT_IRAM0_DRAM0_SPLITLINE, MEMPROT_IRAM0_LINE_0_SPLITLINE, MEMPROT_IRAM0_LINE_1_SPLITLINE, MEMPROT_DRAM0_DMA_LINE_0_SPLITLINE, MEMPROT_DRAM0_DMA_LINE_1_SPLITLINE } split_line_t; typedef enum { MEMPROT_PMS_AREA_NONE = 0, MEMPROT_IRAM0_PMS_AREA_0, MEMPROT_IRAM0_PMS_AREA_1, MEMPROT_IRAM0_PMS_AREA_2, MEMPROT_IRAM0_PMS_AREA_3, MEMPROT_DRAM0_PMS_AREA_0, MEMPROT_DRAM0_PMS_AREA_1, MEMPROT_DRAM0_PMS_AREA_2, MEMPROT_DRAM0_PMS_AREA_3 } pms_area_t; typedef enum { MEMPROT_PMS_WORLD_0 = 0, MEMPROT_PMS_WORLD_1, MEMPROT_PMS_WORLD_2, MEMPROT_PMS_WORLD_INVALID = 0xFFFFFFFF } pms_world_t; typedef enum { MEMPROT_PMS_OP_READ = 0, MEMPROT_PMS_OP_WRITE, MEMPROT_PMS_OP_FETCH, MEMPROT_PMS_OP_INVALID = 0xFFFFFFFF } pms_operation_type_t; /** * @brief Converts Memory protection type to string * * @param mem_type Memory protection type (see mem_type_prot_t enum) */ const char *esp_memprot_mem_type_to_str(mem_type_prot_t mem_type); /** * @brief Converts Split line type to string * * @param line_type Split line type (see split_line_t enum) */ const char *esp_memprot_split_line_to_str(split_line_t line_type); /** * @brief Converts PMS Area type to string * * @param area_type PMS Area type (see pms_area_t enum) */ const char *esp_memprot_pms_to_str(pms_area_t area_type); /** * @brief Returns PMS splitting address for given Split line type * * The value is taken from PMS configuration registers (IRam0 range) * For details on split lines see 'esp_memprot_set_prot_int' function description * * @param line_type Split line type (see split_line_t enum) * * @return appropriate split line address */ uint32_t *esp_memprot_get_split_addr(split_line_t line_type); /** * @brief Returns default main IRAM/DRAM splitting address * * The address value is given by _iram_text_end global (IRam0 range) * @return Main I/D split line (IRam0_DRam0_Split_Addr) */ void *esp_memprot_get_default_main_split_addr(void); /** * @brief Sets a lock for the main IRAM/DRAM splitting address * * Locks can be unlocked only by digital system reset */ void esp_memprot_set_split_line_lock(void); /** * @brief Gets a lock status for the main IRAM/DRAM splitting address * * @return true/false (locked/unlocked) */ bool esp_memprot_get_split_line_lock(void); /** * @brief Sets required split line address * * @param line_type Split line type (see split_line_t enum) * @param line_addr target address from a memory range relevant to given line_type (IRAM/DRAM) */ void esp_memprot_set_split_line(split_line_t line_type, const void *line_addr); /** * @brief Sets a lock for PMS Area settings of required Memory type * * Locks can be unlocked only by digital system reset * * @param mem_type Memory protection type (see mem_type_prot_t enum) */ void esp_memprot_set_pms_lock(mem_type_prot_t mem_type); /** * @brief Gets a lock status for PMS Area settings of required Memory type * * @param mem_type Memory protection type (see mem_type_prot_t enum) * * @return true/false (locked/unlocked) */ bool esp_memprot_get_pms_lock(mem_type_prot_t mem_type); /** * @brief Sets permissions for given PMS Area in IRam0 memory range (MEMPROT_IRAM0_SRAM) * * @param area_type IRam0 PMS Area type (see pms_area_t enum) * @param r Read permission flag * @param w Write permission flag * @param x Execute permission flag */ void esp_memprot_iram_set_pms_area(pms_area_t area_type, bool r, bool w, bool x); /** * @brief Gets current permissions for given PMS Area in IRam0 memory range (MEMPROT_IRAM0_SRAM) * * @param area_type IRam0 PMS Area type (see pms_area_t enum) * @param r Read permission flag holder * @param w Write permission flag holder * @param x Execute permission flag holder */ void esp_memprot_iram_get_pms_area(pms_area_t area_type, bool *r, bool *w, bool *x); /** * @brief Sets permissions for given PMS Area in DRam0 memory range (MEMPROT_DRAM0_SRAM) * * @param area_type DRam0 PMS Area type (see pms_area_t enum) * @param r Read permission flag * @param w Write permission flag */ void esp_memprot_dram_set_pms_area(pms_area_t area_type, bool r, bool w); /** * @brief Gets current permissions for given PMS Area in DRam0 memory range (MEMPROT_DRAM0_SRAM) * * @param area_type DRam0 PMS Area type (see pms_area_t enum) * @param r Read permission flag holder * @param w Write permission flag holder */ void esp_memprot_dram_get_pms_area(pms_area_t area_type, bool *r, bool *w); /** * @brief Sets a lock for PMS interrupt monitor settings of required Memory type * * Locks can be unlocked only by digital system reset * * @param mem_type Memory protection type (see mem_type_prot_t enum) */ void esp_memprot_set_monitor_lock(mem_type_prot_t mem_type); /** * @brief Gets a lock status for PMS interrupt monitor settings of required Memory type * * @param mem_type Memory protection type (see mem_type_prot_t enum) * * @return true/false (locked/unlocked) */ bool esp_memprot_get_monitor_lock(mem_type_prot_t mem_type); /** * @brief Enable PMS violation interrupt monitoring of required Memory type * * @param mem_type Memory protection type (see mem_type_prot_t enum) * @param enable/disable */ void esp_memprot_set_monitor_en(mem_type_prot_t mem_type, bool enable); /** * @brief Gets enable/disable status for PMS interrupt monitor settings of required Memory type * * @param mem_type Memory protection type (see mem_type_prot_t enum) * * @return true/false (enabled/disabled) */ bool esp_memprot_get_monitor_en(mem_type_prot_t mem_type); /** * @brief Gets CPU ID for currently active PMS violation interrupt * * @return CPU ID (CPU_PRO for ESP32-C2) */ int IRAM_ATTR esp_memprot_intr_get_cpuid(void); /** * @brief Clears current interrupt ON flag for given Memory type * * Interrupt clearing happens in two steps: * 1. Interrupt CLR flag is set (to clear the interrupt ON status) * 2. Interrupt CLR flag is reset (to allow further monitoring) * This operation is non-atomic by PMS module design * * @param mem_type Memory protection type (see mem_type_prot_t enum) */ void IRAM_ATTR esp_memprot_monitor_clear_intr(mem_type_prot_t mem_type); /** * @brief Returns active PMS violation interrupt (if any) * * This function iterates through supported Memory type status registers * and returns the first interrupt-on flag. If none is found active, * MEMPROT_NONE is returned. * Order of checking (in current version): * 1. MEMPROT_IRAM0_SRAM * 2. MEMPROT_DRAM0_SRAM * * @return mem_type Memory protection type related to active interrupt found (see mem_type_prot_t enum) */ mem_type_prot_t IRAM_ATTR esp_memprot_get_active_intr_memtype(void); /** * @brief Checks whether any violation interrupt is active * * @return true/false (yes/no) */ bool IRAM_ATTR esp_memprot_is_locked_any(void); /** * @brief Checks whether any violation interrupt is enabled * * @return true/false (yes/no) */ bool IRAM_ATTR esp_memprot_is_intr_ena_any(void); /** * @brief Checks whether any violation interrupt is enabled * * @return true/false (yes/no) */ bool IRAM_ATTR esp_memprot_get_violate_intr_on(mem_type_prot_t mem_type); /** * @brief Returns the address which caused the violation interrupt (if any) * * The address is taken from appropriate PMS violation status register, based given Memory type * * @param mem_type Memory protection type (see mem_type_prot_t enum) * * @return faulting address */ uint32_t IRAM_ATTR esp_memprot_get_violate_addr(mem_type_prot_t mem_type); /** * @brief Returns the World identifier of the code causing the violation interrupt (if any) * * The value is taken from appropriate PMS violation status register, based given Memory type * * @param mem_type Memory protection type (see mem_type_prot_t enum) * * @return World identifier (see pms_world_t enum) */ pms_world_t IRAM_ATTR esp_memprot_get_violate_world(mem_type_prot_t mem_type); /** * @brief Returns Read or Write operation type which caused the violation interrupt (if any) * * The value (bit) is taken from appropriate PMS violation status register, based given Memory type * * @param mem_type Memory protection type (see mem_type_prot_t enum) * * @return PMS operation type relevant to mem_type parameter (se pms_operation_type_t) */ pms_operation_type_t IRAM_ATTR esp_memprot_get_violate_wr(mem_type_prot_t mem_type); /** * @brief Returns LoadStore flag of the operation type which caused the violation interrupt (if any) * * The value (bit) is taken from appropriate PMS violation status register, based given Memory type * Effective only on IRam0 access * * @param mem_type Memory protection type (see mem_type_prot_t enum) * * @return true/false (LoadStore bit on/off) */ bool IRAM_ATTR esp_memprot_get_violate_loadstore(mem_type_prot_t mem_type); /** * @brief Returns byte-enables for the address which caused the violation interrupt (if any) * * The value is taken from appropriate PMS violation status register, based given Memory type * * @param mem_type Memory protection type (see mem_type_prot_t enum) * * @return byte-enables */ uint32_t IRAM_ATTR esp_memprot_get_violate_byte_en(mem_type_prot_t mem_type); /** * @brief Returns raw contents of DRam0 status register 1 * * @return 32-bit register value */ uint32_t IRAM_ATTR esp_memprot_get_dram_status_reg_1(void); /** * @brief Returns raw contents of DRam0 status register 2 * * @return 32-bit register value */ uint32_t IRAM_ATTR esp_memprot_get_dram_status_reg_2(void); /** * @brief Returns raw contents of IRam0 status register * * @return 32-bit register value */ uint32_t IRAM_ATTR esp_memprot_get_iram_status_reg(void); /** * @brief Register PMS violation interrupt in global interrupt matrix for given Memory type * * Memory protection components uses specific interrupt number, see ETS_MEMPROT_ERR_INUM * The registration makes the panic-handler routine being called when the interrupt appears * * @param mem_type Memory protection type (see mem_type_prot_t enum) */ void esp_memprot_set_intr_matrix(mem_type_prot_t mem_type); /** * @brief Convenient routine for setting the PMS defaults * * Called on application startup, depending on CONFIG_ESP_SYSTEM_MEMPROT_FEATURE Kconfig settings * For implementation details see 'esp_memprot_set_prot_int' description * * @param invoke_panic_handler register all interrupts for panic handling (true/false) * @param lock_feature lock the defaults to prevent further PMS settings changes (true/false) * @param mem_type_mask 32-bit field of specific PMS parts to configure (see 'esp_memprot_set_prot_int') */ void esp_memprot_set_prot(bool invoke_panic_handler, bool lock_feature, uint32_t *mem_type_mask); /** * @brief Internal routine for setting the PMS defaults * * Called on application startup from within 'esp_memprot_set_prot'. Allows setting a specific splitting address * (main I/D split line) - see the parameter 'split_addr'. If the 'split_addr' equals to NULL, default I/D split line * is used (&_iram_text_end) and all the remaining lines share the same address. * The function sets all the split lines and PMS areas to the same space, * ie there is a single instruction space and single data space at the end. * The PMS split lines and permission areas scheme described below: * * DRam0/DMA IRam0 * ----------------------------------------------- * ... | IRam0_PMS_0 | * DRam0_PMS_0 ----------------------------------------------- IRam0_line1_Split_addr * ... | IRam0_PMS_1 | * ... ----------------------------------------------- IRam0_line0_Split_addr * | IRam0_PMS_2 | * =============================================== IRam0_DRam0_Split_addr (main I/D) * | DRam0_PMS_1 | * DRam0_DMA_line0_Split_addr ----------------------------------------------- ... * | DRam0_PMS_2 | ... * DRam0_DMA_line1_Split_addr ----------------------------------------------- IRam0_PMS_3 * | DRam0_PMS_3 | ... * ----------------------------------------------- * * Default settings provided by 'esp_memprot_set_prot_int' are as follows: * * DRam0/DMA IRam0 * ----------------------------------------------- * | IRam0_PMS_0 = IRam0_PMS_1 = IRam0_PMS_2 | * | DRam0_PMS_0 | IRam0_line1_Split_addr * DRam0_DMA_line0_Split_addr | | = * = =============================================== IRam0_line0_Split_addr * DRam0_DMA_line1_Split_addr | | = * | DRam0_PMS_1 = DRam0_PMS_2 = DRam0_PMS_3 | IRam0_DRam0_Split_addr (main I/D) * | IRam0_PMS_3 | * ----------------------------------------------- * * Once the memprot feature is locked, it can be unlocked only by digital system reset * * @param invoke_panic_handler register all the violation interrupts for panic handling (true/false) * @param lock_feature lock the defaults to prevent further PMS settings changes (true/false) * @param split_addr specific main I/D adrees or NULL to use default ($_iram_text_end) * @param mem_type_mask 32-bit field of specific PMS parts to configure (members of mem_type_prot_t) */ void esp_memprot_set_prot_int(bool invoke_panic_handler, bool lock_feature, void *split_addr, uint32_t *mem_type_mask); /** * @brief Returns raw contents of PMS interrupt monitor register for given Memory type * * @param mem_type Memory protection type (see mem_type_prot_t enum) * * @return 32-bit register value */ uint32_t esp_memprot_get_monitor_enable_reg(mem_type_prot_t mem_type); #ifdef __cplusplus } #endif