126 lines
3.5 KiB
C
126 lines
3.5 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2016 Damien P. George
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*
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* use of the TRNG by
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* Copyright (c) 2017 Scott Shawcroft for Adafruit Industries
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* Copyright (c) 2019 Artur Pacholec
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "py/runtime.h"
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#include "py/mphal.h"
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#if defined(MIMXRT117x_SERIES)
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#include "fsl_caam.h"
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#else
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#include "fsl_trng.h"
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#endif
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static bool initialized = false;
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#if defined(MIMXRT117x_SERIES)
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STATIC caam_handle_t caam_handle;
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STATIC caam_rng_state_handle_t caam_state_handle = kCAAM_RngStateHandle0;
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#if defined(FSL_FEATURE_HAS_L1CACHE) || defined(__DCACHE_PRESENT)
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AT_NONCACHEABLE_SECTION(static caam_job_ring_interface_t s_jrif0);
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#else
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static caam_job_ring_interface_t s_jrif0;
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#endif
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STATIC void trng_start(void) {
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caam_config_t config;
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if (!initialized) {
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CAAM_GetDefaultConfig(&config);
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config.jobRingInterface[0] = &s_jrif0;
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CAAM_Init(CAAM, &config);
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initialized = true;
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}
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}
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void trng_random_data(unsigned char *output, size_t len) {
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trng_start();
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CAAM_RNG_GetRandomData(CAAM, &caam_handle, caam_state_handle, output, len,
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kCAAM_RngDataAny, NULL);
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}
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#else
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STATIC void trng_start(void) {
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trng_config_t trngConfig;
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if (!initialized) {
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TRNG_GetDefaultConfig(&trngConfig);
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trngConfig.sampleMode = kTRNG_SampleModeVonNeumann;
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TRNG_Init(TRNG, &trngConfig);
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initialized = true;
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}
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}
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void trng_random_data(unsigned char *output, size_t len) {
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trng_start();
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TRNG_GetRandomData(TRNG, output, len);
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}
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#endif
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uint32_t trng_random_u32(void) {
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uint32_t rngval;
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trng_start();
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trng_random_data((uint8_t *)&rngval, 4);
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return rngval;
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}
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#if MICROPY_PY_OS_URANDOM
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STATIC mp_obj_t mp_os_urandom(mp_obj_t num) {
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mp_int_t n = mp_obj_get_int(num);
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vstr_t vstr;
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vstr_init_len(&vstr, n);
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trng_start();
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trng_random_data((uint8_t *)vstr.buf, n);
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return mp_obj_new_bytes_from_vstr(&vstr);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_os_urandom_obj, mp_os_urandom);
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#endif
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#if MICROPY_PY_OS_DUPTERM_NOTIFY
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STATIC mp_obj_t mp_os_dupterm_notify(mp_obj_t obj_in) {
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(void)obj_in;
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for (;;) {
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int c = mp_os_dupterm_rx_chr();
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if (c < 0) {
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break;
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}
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ringbuf_put(&stdin_ringbuf, c);
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}
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_os_dupterm_notify_obj, mp_os_dupterm_notify);
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#endif
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