trezor-firmware/core/embed/ble_bootloader/dfu/nrf_dfu_mbr.c

/**
 * Copyright (c) 2016 - 2021, Nordic Semiconductor ASA
 *
 * All rights reserved.
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 * are permitted provided that the following conditions are met:
 *
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 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form, except as embedded into a Nordic
 *    Semiconductor ASA integrated circuit in a product or a software update for
 *    such product, must reproduce the above copyright notice, this list of
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 *    materials provided with the distribution.
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 * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
 *    contributors may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
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 * 4. This software, with or without modification, must only be used with a
 *    Nordic Semiconductor ASA integrated circuit.
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#include "nrf_dfu_mbr.h"
#include "nrf_mbr.h"
#include "nrf_dfu_types.h"
#include "nrf_log.h"
#include "nrf_bootloader_info.h"

#define MBR_IRQ_FORWARD_ADDRESS_ADDRESS (0x20000000) //!< The address of the variable that decides where the MBR forwards interrupts

uint32_t nrf_dfu_mbr_copy_bl(uint32_t * p_src, uint32_t len)
{
    uint32_t ret_val;
    uint32_t const len_words = len / sizeof(uint32_t);

    sd_mbr_command_t command =
    {
        .command = SD_MBR_COMMAND_COPY_BL,
        .params.copy_bl.bl_src = p_src,
        .params.copy_bl.bl_len = len_words
    };

    ret_val = sd_mbr_command(&command);

    return ret_val;
}


uint32_t nrf_dfu_mbr_init_sd(void)
{
    uint32_t ret_val;

    sd_mbr_command_t command =
    {
        .command = SD_MBR_COMMAND_INIT_SD
    };

    ret_val = sd_mbr_command(&command);

    return ret_val;
}


uint32_t nrf_dfu_mbr_irq_forward_address_set(void)
{
    uint32_t ret_val = NRF_ERROR_INVALID_PARAM;
    uint32_t address = MBR_SIZE;

#if !defined(BLE_STACK_SUPPORT_REQD) && !defined(ANT_STACK_SUPPORT_REQD)
    sd_mbr_command_t command =
    {
        .command = SD_MBR_COMMAND_IRQ_FORWARD_ADDRESS_SET,
        .params.irq_forward_address_set.address = address,
    };

    ret_val = sd_mbr_command(&command);
#endif

    if (ret_val == NRF_ERROR_INVALID_PARAM)
    {
        // Manually set the forward address if this MBR doesn't have the command.
        *(uint32_t *)(MBR_IRQ_FORWARD_ADDRESS_ADDRESS) = address;

        ret_val = NRF_SUCCESS;
    }

    return ret_val;
}