trezor-firmware/core/embed/trezorhal/common.h

/*
 * 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_COMMON_H__
#define __TREZORHAL_COMMON_H__

#include <stddef.h>
#include <stdint.h>
#include "secbool.h"

#include "error_handling.h"
#include "platform.h"

#ifndef MIN_8bits
#define MIN_8bits(a, b)                  \
  ({                                     \
    typeof(a) _a = (a);                  \
    typeof(b) _b = (b);                  \
    _a < _b ? (_a & 0xFF) : (_b & 0xFF); \
  })
#endif
#ifndef MIN
#define MIN(a, b)       \
  ({                    \
    typeof(a) _a = (a); \
    typeof(b) _b = (b); \
    _a < _b ? _a : _b;  \
  })
#endif
#ifndef MAX
#define MAX(a, b)       \
  ({                    \
    typeof(a) _a = (a); \
    typeof(b) _b = (b); \
    _a > _b ? _a : _b;  \
  })
#endif

void __attribute__((noreturn)) trezor_shutdown(void);

void hal_delay(uint32_t ms);
uint32_t hal_ticks_ms();
void hal_delay_us(uint16_t delay_us);

void collect_hw_entropy(void);
#define HW_ENTROPY_LEN (12 + 32)
extern uint8_t HW_ENTROPY_DATA[HW_ENTROPY_LEN];

// Invalidates firmware on the device
// Note: only works when write access to firmware area is enabled by MPU
void invalidate_firmware(void);

#endif