f7d313b154
When building Zephyr in the controller-only configuration, assertions that happen in the Link Layer code are not visible to the Host which is running on another HCI and connected via UART or USB to it. This patch allows the Controller code to output the assertion line number when in such a configuration, allowing the Host to view the event to help debugging. The event format used is temporary and will be replaced by a standardized Vendor Specific specification to come at a later time. Change-Id: I013ca6783a3fdedc47b171132919dd4798c66285 Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>
123 lines
2.4 KiB
C
123 lines
2.4 KiB
C
/*
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* Copyright (c) 2016 Nordic Semiconductor ASA
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* Copyright (c) 2016 Vinayak Kariappa Chettimada
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <soc.h>
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#include "rand.h"
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#include "debug.h"
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#define RAND_RESERVED (4)
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struct rand {
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uint8_t count;
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uint8_t first;
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uint8_t last;
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uint8_t rand[1];
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};
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static struct rand *_rand;
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void rand_init(uint8_t *context, uint8_t context_len)
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{
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LL_ASSERT(context_len > sizeof(struct rand));
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_rand = (struct rand *)context;
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_rand->count = context_len - sizeof(struct rand) + 1;
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_rand->first = _rand->last = 0;
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NRF_RNG->CONFIG = RNG_CONFIG_DERCEN_Msk;
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NRF_RNG->EVENTS_VALRDY = 0;
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NRF_RNG->INTENSET = RNG_INTENSET_VALRDY_Msk;
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NRF_RNG->TASKS_START = 1;
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}
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uint32_t rand_get(uint8_t octets, uint8_t *rand)
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{
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uint8_t reserved;
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uint8_t first;
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while (octets) {
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if (_rand->first == _rand->last) {
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break;
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}
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rand[--octets] = _rand->rand[_rand->first];
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first = _rand->first + 1;
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if (first == _rand->count) {
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first = 0;
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}
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_rand->first = first;
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}
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reserved = RAND_RESERVED;
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first = _rand->first;
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while (reserved--) {
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if (first == _rand->last) {
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NRF_RNG->TASKS_START = 1;
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break;
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}
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first++;
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if (first == _rand->count) {
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first = 0;
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}
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}
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return octets;
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}
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void rng_isr(void)
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{
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if (NRF_RNG->EVENTS_VALRDY) {
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uint8_t last;
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last = _rand->last + 1;
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if (last == _rand->count) {
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last = 0;
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}
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if (last == _rand->first) {
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/* this condition should not happen
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* , but due to probable bug in HW
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* , new value could be generated
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* before task is stopped.
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*/
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NRF_RNG->TASKS_STOP = 1;
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NRF_RNG->EVENTS_VALRDY = 0;
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return;
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}
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_rand->rand[_rand->last] = NRF_RNG->VALUE;
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_rand->last = last;
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last = _rand->last + 1;
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if (last == _rand->count) {
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last = 0;
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}
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NRF_RNG->EVENTS_VALRDY = 0;
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if (last == _rand->first) {
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NRF_RNG->TASKS_STOP = 1;
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}
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}
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}
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