esp-idf/components/esp_hw_support/include/soc/esp32c3/memprot.h
2021-07-16 20:14:26 +08:00

458 lines
16 KiB
C

// Copyright 2020 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/* INTERNAL API
* generic interface to PMS memory protection features
*/
#pragma once
#include <stdbool.h>
#include <stdint.h>
#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
#ifndef MAP_DRAM_TO_IRAM
#define MAP_DRAM_TO_IRAM(addr) (addr - DRAM_SRAM_START + IRAM_SRAM_START)
#endif
#ifndef MAP_IRAM_TO_DRAM
#define MAP_IRAM_TO_DRAM(addr) (addr - IRAM_SRAM_START + DRAM_SRAM_START)
#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 ESP32C3)
*/
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