mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-26 17:38:39 +00:00
72 lines
2.6 KiB
C
72 lines
2.6 KiB
C
/*
|
|
* This file is part of the Trezor project, https://trezor.io/
|
|
*
|
|
* Copyright (c) SatoshiLabs
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef TREZORHAL_MPU_H
|
|
#define TREZORHAL_MPU_H
|
|
|
|
#ifdef KERNEL_MODE
|
|
|
|
// The MPU driver can be set to on of the following modes.
|
|
//
|
|
// In each mode, the MPU is configured to allow access to specific
|
|
// memory regions.
|
|
//
|
|
// The `MPU_MODE_DEFAULT` mode is the most restrictive and serves as
|
|
// a base for other modes.
|
|
typedef enum {
|
|
MPU_MODE_DISABLED, // MPU is disabled
|
|
MPU_MODE_DEFAULT, // Default
|
|
MPU_MODE_BOARDCAPS, // + boardloader capabilities (privileged RO)
|
|
MPU_MODE_BOOTUPDATE, // + bootloader area (privileged RW)
|
|
MPU_MODE_OTP, // + OTP (privileged RW)
|
|
MPU_MODE_FSMC_REGS, // + FSMC control registers (privileged RW)
|
|
MPU_MODE_FLASHOB, // + Option bytes mapping (privileged RW)
|
|
MPU_MODE_SECRET, // + secret area (privileged RW)
|
|
MPU_MODE_STORAGE, // + both storage areas (privileged RW)
|
|
MPU_MODE_ASSETS, // + assets (privileged RW)
|
|
MPU_MODE_SAES, // + unprivileged SAES code
|
|
MPU_MODE_KERNEL_SRAM, // + extra kernel SRAM (STM32F4 Only) (privileged RW)
|
|
MPU_MODE_UNUSED_FLASH, // + unused flash areas (privileged RW)
|
|
MPU_MODE_APP, // + unprivileged DMA2D (RW) & Assets (RO)
|
|
} mpu_mode_t;
|
|
|
|
// Initializes the MPU and sets it to MPU_MODE_DISABLED.
|
|
//
|
|
// This function should be called before any other MPU function.
|
|
void mpu_init(void);
|
|
|
|
// Returns the current MPU mode.
|
|
//
|
|
// If the MPU is not initialized, returns MPU_MODE_DISABLED.
|
|
mpu_mode_t mpu_get_mode(void);
|
|
|
|
// Reconfigures the MPU to the given mode and returns the previous mode.
|
|
//
|
|
// If the MPU is not initialized, does nothing and returns MPU_MODE_DISABLED.
|
|
mpu_mode_t mpu_reconfig(mpu_mode_t mode);
|
|
|
|
// Restores the MPU to the given mode.
|
|
//
|
|
// Same as `mpu_reconfig()`, but with a more descriptive name.
|
|
void mpu_restore(mpu_mode_t mode);
|
|
|
|
#endif // KERNEL_MODE
|
|
|
|
#endif // TREZORHAL_MPU_H
|