kopia lustrzana https://github.com/espressif/esp-idf
153 wiersze
3.5 KiB
C
153 wiersze
3.5 KiB
C
/*
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* SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#pragma once
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#include <stdbool.h>
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#include <string.h>
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#include "hal/assert.h"
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#include "hal/mpi_types.h"
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#include "soc/rsa_reg.h"
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#include "soc/mpi_periph.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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static inline size_t mpi_ll_calculate_hardware_words(size_t words)
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{
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return words;
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}
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// No need to initialize Power Control Registers in case of ESP32-P4
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static inline void mpi_ll_clear_power_control_bit(void)
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{
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}
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static inline void mpi_ll_set_power_control_bit(void)
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{
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}
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static inline void mpi_ll_enable_interrupt(void)
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{
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REG_WRITE(RSA_INT_ENA_REG, 1);
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}
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static inline void mpi_ll_disable_interrupt(void)
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{
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REG_WRITE(RSA_INT_ENA_REG, 0);
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}
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static inline void mpi_ll_clear_interrupt(void)
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{
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REG_WRITE(RSA_INT_CLR_REG, 1);
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}
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static inline bool mpi_ll_check_memory_init_complete(void)
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{
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return REG_READ(RSA_QUERY_CLEAN_REG) == 0;
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}
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static inline void mpi_ll_start_op(mpi_op_t op)
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{
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REG_WRITE(MPI_LL_OPERATIONS[op], 1);
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}
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static inline bool mpi_ll_get_int_status(void)
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{
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return REG_READ(RSA_QUERY_IDLE_REG) == 0;
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}
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/* Copy MPI bignum (p) to hardware memory block at 'mem_base' of mpi_param_t 'param'.
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If num_words is higher than the number of words (n) in the bignum then
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these additional words will be zeroed in the memory buffer.
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*/
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static inline void mpi_ll_write_to_mem_block(mpi_param_t param, size_t offset, const uint32_t* p, size_t n, size_t num_words)
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{
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uint32_t mem_base = MPI_LL_BLOCK_BASES[param] + offset;
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uint32_t* pbase = (uint32_t*) mem_base;
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uint32_t copy_words = MIN(num_words, n);
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/* Copy MPI data to memory block registers */
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for (int i = 0; i < copy_words; i++) {
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pbase[i] = p[i];
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}
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/* Zero any remaining memory block data */
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for (int i = copy_words; i < num_words; i++) {
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pbase[i] = 0;
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}
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}
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static inline void mpi_ll_write_m_prime(uint32_t Mprime)
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{
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REG_WRITE(RSA_M_PRIME_REG, Mprime);
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}
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static inline void mpi_ll_write_rinv(uint32_t rinv)
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{
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REG_WRITE(MPI_LL_BLOCK_BASES[MPI_PARAM_Z], rinv);
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}
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static inline void mpi_ll_write_at_offset(mpi_param_t param, int offset, uint32_t value)
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{
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uint32_t mem_base = MPI_LL_BLOCK_BASES[param] + offset;
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REG_WRITE(mem_base, value);
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}
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/* Read MPI bignum (p) back from hardware memory block.
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Reads z_words words from block.
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*/
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static inline void mpi_ll_read_from_mem_block(uint32_t* p, size_t n, size_t num_words)
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{
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uint32_t mem_base = MPI_LL_BLOCK_BASES[MPI_PARAM_Z];
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/* Copy data from memory block registers */
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const size_t REG_WIDTH = sizeof(uint32_t);
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for (size_t i = 0; i < num_words; i++) {
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p[i] = REG_READ(mem_base + (i * REG_WIDTH));
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}
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/* Zero any remaining limbs in the bignum, if the buffer is bigger
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than num_words */
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for (size_t i = num_words; i < n; i++) {
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p[i] = 0;
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}
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}
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static inline void mpi_ll_set_mode(size_t length)
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{
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REG_WRITE(RSA_MODE_REG, length);
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}
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static inline void mpi_ll_disable_constant_time(void)
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{
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REG_WRITE(RSA_CONSTANT_TIME_REG, 0);
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}
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static inline void mpi_ll_enable_constant_time(void)
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{
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REG_WRITE(RSA_CONSTANT_TIME_REG, 1);
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}
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static inline void mpi_ll_disable_search(void)
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{
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REG_WRITE(RSA_SEARCH_ENABLE_REG, 0);
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}
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static inline void mpi_ll_enable_search(void)
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{
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REG_WRITE(RSA_SEARCH_ENABLE_REG, 1);
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}
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static inline void mpi_ll_set_search_position(size_t pos)
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{
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REG_WRITE(RSA_SEARCH_POS_REG, pos);
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}
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#ifdef __cplusplus
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}
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#endif
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