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Merge branch 'esp32p4/add_mpi_support' into 'master'
feat(mpi): add MPI peripheral support for esp32p4 See merge request espressif/esp-idf!25110
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/* | ||
* SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD | ||
* | ||
* SPDX-License-Identifier: Apache-2.0 | ||
*/ | ||
#pragma once | ||
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#include <stdbool.h> | ||
#include <string.h> | ||
#include "hal/assert.h" | ||
#include "soc/rsa_reg.h" | ||
#include "soc/mpi_periph.h" | ||
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#ifdef __cplusplus | ||
extern "C" { | ||
#endif | ||
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static inline size_t mpi_ll_calculate_hardware_words(size_t words) | ||
{ | ||
return words; | ||
} | ||
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// No need to initialize Power Control Registers in case of ESP32-P4 | ||
static inline void mpi_ll_clear_power_control_bit(void) | ||
{ | ||
} | ||
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static inline void mpi_ll_set_power_control_bit(void) | ||
{ | ||
} | ||
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static inline void mpi_ll_enable_interrupt(void) | ||
{ | ||
REG_WRITE(RSA_INT_ENA_REG, 1); | ||
} | ||
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static inline void mpi_ll_disable_interrupt(void) | ||
{ | ||
REG_WRITE(RSA_INT_ENA_REG, 0); | ||
} | ||
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static inline void mpi_ll_clear_interrupt(void) | ||
{ | ||
REG_WRITE(RSA_INT_CLR_REG, 1); | ||
} | ||
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static inline bool mpi_ll_check_memory_init_complete(void) | ||
{ | ||
return REG_READ(RSA_QUERY_CLEAN_REG) == 0; | ||
} | ||
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static inline void mpi_ll_start_op(mpi_op_t op) | ||
{ | ||
REG_WRITE(MPI_LL_OPERATIONS[op], 1); | ||
} | ||
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static inline bool mpi_ll_get_int_status(void) | ||
{ | ||
return REG_READ(RSA_QUERY_IDLE_REG) == 0; | ||
} | ||
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/* Copy MPI bignum (p) to hardware memory block at 'mem_base' of mpi_param_t 'param'. | ||
If num_words is higher than the number of words (n) in the bignum then | ||
these additional words will be zeroed in the memory buffer. | ||
*/ | ||
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) | ||
{ | ||
uint32_t mem_base = MPI_LL_BLOCK_BASES[param] + offset; | ||
uint32_t* pbase = (uint32_t*) mem_base; | ||
uint32_t copy_words = MIN(num_words, n); | ||
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/* Copy MPI data to memory block registers */ | ||
for (int i = 0; i < copy_words; i++) { | ||
pbase[i] = p[i]; | ||
} | ||
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/* Zero any remaining memory block data */ | ||
for (int i = copy_words; i < num_words; i++) { | ||
pbase[i] = 0; | ||
} | ||
} | ||
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static inline void mpi_ll_write_m_prime(uint32_t Mprime) | ||
{ | ||
REG_WRITE(RSA_M_PRIME_REG, Mprime); | ||
} | ||
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static inline void mpi_ll_write_rinv(uint32_t rinv) | ||
{ | ||
REG_WRITE(MPI_LL_BLOCK_BASES[MPI_PARAM_Z], rinv); | ||
} | ||
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static inline void mpi_ll_write_at_offset(mpi_param_t param, int offset, uint32_t value) | ||
{ | ||
uint32_t mem_base = MPI_LL_BLOCK_BASES[param] + offset; | ||
REG_WRITE(mem_base, value); | ||
} | ||
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/* Read MPI bignum (p) back from hardware memory block. | ||
Reads z_words words from block. | ||
*/ | ||
static inline void mpi_ll_read_from_mem_block(uint32_t* p, size_t n, size_t num_words) | ||
{ | ||
uint32_t mem_base = MPI_LL_BLOCK_BASES[MPI_PARAM_Z]; | ||
/* Copy data from memory block registers */ | ||
const size_t REG_WIDTH = sizeof(uint32_t); | ||
for (size_t i = 0; i < num_words; i++) { | ||
p[i] = REG_READ(mem_base + (i * REG_WIDTH)); | ||
} | ||
/* Zero any remaining limbs in the bignum, if the buffer is bigger | ||
than num_words */ | ||
for (size_t i = num_words; i < n; i++) { | ||
p[i] = 0; | ||
} | ||
} | ||
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static inline void mpi_ll_set_mode(size_t length) | ||
{ | ||
REG_WRITE(RSA_MODE_REG, length); | ||
} | ||
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static inline void mpi_ll_disable_constant_time(void) | ||
{ | ||
REG_WRITE(RSA_CONSTANT_TIME_REG, 0); | ||
} | ||
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static inline void mpi_ll_enable_constant_time(void) | ||
{ | ||
REG_WRITE(RSA_CONSTANT_TIME_REG, 1); | ||
} | ||
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static inline void mpi_ll_disable_search(void) | ||
{ | ||
REG_WRITE(RSA_SEARCH_ENABLE_REG, 0); | ||
} | ||
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static inline void mpi_ll_enable_search(void) | ||
{ | ||
REG_WRITE(RSA_SEARCH_ENABLE_REG, 1); | ||
} | ||
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static inline void mpi_ll_set_search_position(size_t pos) | ||
{ | ||
REG_WRITE(RSA_SEARCH_POS_REG, pos); | ||
} | ||
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#ifdef __cplusplus | ||
} | ||
#endif |
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Original file line number | Diff line number | Diff line change |
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/* | ||
* SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD | ||
* | ||
* SPDX-License-Identifier: Apache-2.0 | ||
*/ | ||
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#include "soc/rsa_reg.h" | ||
#include "soc/mpi_periph.h" | ||
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const uint32_t MPI_LL_BLOCK_BASES[4] = { | ||
RSA_X_MEM, | ||
RSA_Y_MEM, | ||
RSA_Z_MEM, | ||
RSA_M_MEM, | ||
}; | ||
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const uint32_t MPI_LL_OPERATIONS[3] = { | ||
RSA_SET_START_MULT_REG, | ||
RSA_SET_START_MODMULT_REG, | ||
RSA_SET_START_MODEXP_REG, | ||
}; |