/* * mkmif.c * ------- * HAL interface to Cryptech Master Key Memory Interface. * * Copyright (c) 2016, NORDUnet A/S * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * - Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * - Neither the name of the NORDUnet nor the names of its contributors may * be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include #include "hal.h" #include "hal_internal.h" typedef union { uint8_t byte[4]; uint32_t word; } byteword_t; hal_error_t hal_mkmif_init(const hal_core_t *core) { byteword_t cmd; hal_error_t err; if (core == NULL) return HAL_ERROR_CORE_NOT_FOUND; cmd.word = htonl(MKMIF_CTRL_CMD_INIT); if ((err = hal_io_write(core, MKMIF_ADDR_CTRL, cmd.byte, 4)) || (err = hal_io_wait_ready(core))) return err; return HAL_OK; } hal_error_t hal_mkmif_set_clockspeed(const hal_core_t *core, const uint32_t divisor) { byteword_t data; if (core == NULL) return HAL_ERROR_CORE_NOT_FOUND; data.word = htonl(divisor); return hal_io_write(core, MKMIF_ADDR_SCLK_DIV, data.byte, 4); } hal_error_t hal_mkmif_get_clockspeed(const hal_core_t *core, uint32_t *divisor) { byteword_t data; hal_error_t err; if (core == NULL) return HAL_ERROR_CORE_NOT_FOUND; if ((err = hal_io_read(core, MKMIF_ADDR_SCLK_DIV, data.byte, 4))) return err; *divisor = htonl(data.word); return HAL_OK; } hal_error_t hal_mkmif_write(const hal_core_t *core, uint32_t addr, const uint8_t *buf, size_t len) { byteword_t cmd; hal_error_t err; if (core == NULL) return HAL_ERROR_CORE_NOT_FOUND; if (len % 4 != 0) return HAL_ERROR_IO_BAD_COUNT; cmd.word = htonl(MKMIF_CTRL_CMD_WRITE); for (; len > 0; addr += 4, buf += 4, len -= 4) { byteword_t write_addr; write_addr.word = htonl((uint32_t)addr); if ((err = hal_io_write(core, MKMIF_ADDR_EMEM_ADDR, write_addr.byte, 4)) || (err = hal_io_write(core, MKMIF_ADDR_EMEM_DATA, buf, 4)) || (err = hal_io_write(core, MKMIF_ADDR_CTRL, cmd.byte, 4)) || (err = hal_io_wait_ready(core))) return err; } return HAL_OK; } hal_error_t hal_mkmif_write_word(const hal_core_t *core, uint32_t addr, const uint32_t data) { byteword_t d; d.word = htonl(data); return hal_mkmif_write(core, addr, d.byte, 4); } hal_error_t hal_mkmif_read(const hal_core_t *core, uint32_t addr, uint8_t *buf, size_t len) { byteword_t cmd; hal_error_t err; if (core == NULL) return HAL_ERROR_CORE_NOT_FOUND; if (len % 4 != 0) return HAL_ERROR_IO_BAD_COUNT; cmd.word = htonl(MKMIF_CTRL_CMD_READ); for (; len > 0; addr += 4, buf += 4, len -= 4) { byteword_t read_addr; read_addr.word = htonl((uint32_t)addr); if ((err = hal_io_write(core, MKMIF_ADDR_EMEM_ADDR, read_addr.byte, 4)) || (err = hal_io_write(core, MKMIF_ADDR_CTRL, cmd.byte, 4)) || (err = hal_io_wait_valid(core)) || (err = hal_io_read(core, MKMIF_ADDR_EMEM_DATA, buf, 4))) return err; } return HAL_OK; } hal_error_t hal_mkmif_read_word(const hal_core_t *core, uint32_t addr, uint32_t *data) { byteword_t d; hal_error_t err; if ((err = hal_mkmif_read(core, addr, d.byte, 4)) != HAL_OK) return err; *data = htonl(d.word); return HAL_OK; } implementation nor PyCrypto' href='/sw/libhal/commit/errorstrings.c?h=auto_magic&id=cf865e9d768ab2dad37f82f071f0050b20f18506'>cf865e9 
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