read_only.c

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// SPDX-License-Identifier: GPL-2.0-or-later
 
/*
 * Copyright (C) 2019 by Tomas Vanek <vanekt@fbl.cz>
 *
 * To declare a read-only region for GDB memory map.
 */
 
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
 
#include "imp.h"
 
FLASH_BANK_COMMAND_HANDLER(rom_bank_command)
{
    bank->read_only = true;
    return ERROR_OK;
}
 
static int rom_erase(struct flash_bank *bank, unsigned int first, unsigned int last)
{
    LOG_ERROR("Erase of read-only memory refused");
    return ERROR_FAIL;
}
 
static int rom_write(struct flash_bank *bank, const uint8_t *buffer,
        uint32_t offset, uint32_t count)
{
    LOG_ERROR("Write to read-only memory refused");
    return ERROR_FAIL;
}
 
static int rom_probe(struct flash_bank *bank)
{
    return ERROR_OK;
}
 
const struct flash_driver read_only_flash = {
    .name = "read_only",
    .flash_bank_command = rom_bank_command,
    .erase = rom_erase,
    .write = rom_write,
    .read = default_flash_read,
    .probe = rom_probe,
    .auto_probe = rom_probe,
    .erase_check = default_flash_blank_check,
 
    // ROM driver doesn't set driver_priv, free(NULL) makes no harm
    .free_driver_priv = default_flash_free_driver_priv,
};