- freertos: add deprecated definition for XT_CLOCK_FREQ - flash_ops: don't use XT_CLOCK_FREQ - unity: don't use XT_CLOCK_FREQ - hw_random: don't use XT_CLOCK_FREQ - core_dump: don't use XT_CLOCK_FREQ - app_trace: don't use XT_CLOCK_FREQ - xtensa_init: init xt_tick_divisor
191 lines
6.2 KiB
C
191 lines
6.2 KiB
C
// Copyright 2017 Espressif Systems (Shanghai) PTE LTD
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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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// 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 "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#include "esp_app_trace_util.h"
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#include "esp_clk.h"
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////// TIMEOUT /////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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#define ESP_APPTRACE_CPUTICKS2US(_t_, _cpu_freq_) ((_t_)/(_cpu_freq_/1000000))
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#define ESP_APPTRACE_US2CPUTICKS(_t_, _cpu_freq_) ((_t_)*(_cpu_freq_/1000000))
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esp_err_t esp_apptrace_tmo_check(esp_apptrace_tmo_t *tmo)
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{
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int cpu_freq = esp_clk_cpu_freq();
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if (tmo->tmo != ESP_APPTRACE_TMO_INFINITE) {
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unsigned cur = portGET_RUN_TIME_COUNTER_VALUE();
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if (tmo->start <= cur) {
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tmo->elapsed = ESP_APPTRACE_CPUTICKS2US(cur - tmo->start, cpu_freq);
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} else {
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tmo->elapsed = ESP_APPTRACE_CPUTICKS2US(0xFFFFFFFF - tmo->start + cur, cpu_freq);
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}
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if (tmo->elapsed >= tmo->tmo) {
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return ESP_ERR_TIMEOUT;
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}
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}
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return ESP_OK;
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}
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////// LOCK ////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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esp_err_t esp_apptrace_lock_take(esp_apptrace_lock_t *lock, esp_apptrace_tmo_t *tmo)
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{
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int res;
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while (1) {
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// do not overwrite lock->int_state before we actually acquired the mux
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unsigned int_state = portENTER_CRITICAL_NESTED();
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// FIXME: if mux is busy it is not good idea to loop during the whole tmo with disabled IRQs.
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// So we check mux state using zero tmo, restore IRQs and let others tasks/IRQs to run on this CPU
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// while we are doing our own tmo check.
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#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG
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bool success = vPortCPUAcquireMutexTimeout(&lock->mux, 0, __FUNCTION__, __LINE__);
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#else
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bool success = vPortCPUAcquireMutexTimeout(&lock->mux, 0);
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#endif
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if (success) {
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lock->int_state = int_state;
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return ESP_OK;
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}
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portEXIT_CRITICAL_NESTED(int_state);
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// we can be preempted from this place till the next call (above) to portENTER_CRITICAL_NESTED()
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res = esp_apptrace_tmo_check(tmo);
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if (res != ESP_OK) {
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break;
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}
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}
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return res;
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}
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esp_err_t esp_apptrace_lock_give(esp_apptrace_lock_t *lock)
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{
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// save lock's irq state value for this CPU
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unsigned int_state = lock->int_state;
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// after call to the following func we can not be sure that lock->int_state
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// is not overwritten by other CPU who has acquired the mux just after we released it. See esp_apptrace_lock_take().
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#ifdef CONFIG_FREERTOS_PORTMUX_DEBUG
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vPortCPUReleaseMutex(&lock->mux, __FUNCTION__, __LINE__);
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#else
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vPortCPUReleaseMutex(&lock->mux);
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#endif
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portEXIT_CRITICAL_NESTED(int_state);
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return ESP_OK;
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}
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///////////////////////////////////////////////////////////////////////////////
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////////////////////////////// RING BUFFER ////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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uint8_t *esp_apptrace_rb_produce(esp_apptrace_rb_t *rb, uint32_t size)
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{
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uint8_t *ptr = rb->data + rb->wr;
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// check for avalable space
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if (rb->rd <= rb->wr) {
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// |?R......W??|
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if (rb->wr + size >= rb->size) {
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if (rb->rd == 0) {
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return NULL; // cannot wrap wr
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}
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if (rb->wr + size == rb->size) {
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rb->wr = 0;
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} else {
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// check if we can wrap wr earlier to get space for requested size
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if (size > rb->rd - 1) {
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return NULL; // cannot wrap wr
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}
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// shrink buffer a bit, full size will be restored at rd wrapping
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rb->cur_size = rb->wr;
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rb->wr = 0;
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ptr = rb->data;
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if (rb->rd == rb->cur_size) {
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rb->rd = 0;
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if (rb->cur_size < rb->size) {
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rb->cur_size = rb->size;
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}
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}
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rb->wr += size;
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}
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} else {
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rb->wr += size;
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}
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} else {
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// |?W......R??|
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if (size > rb->rd - rb->wr - 1) {
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return NULL;
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}
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rb->wr += size;
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}
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return ptr;
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}
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uint8_t *esp_apptrace_rb_consume(esp_apptrace_rb_t *rb, uint32_t size)
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{
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uint8_t *ptr = rb->data + rb->rd;
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if (rb->rd <= rb->wr) {
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// |?R......W??|
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if (rb->rd + size > rb->wr) {
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return NULL;
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}
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rb->rd += size;
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} else {
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// |?W......R??|
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if (rb->rd + size > rb->cur_size) {
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return NULL;
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} else if (rb->rd + size == rb->cur_size) {
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// restore full size usage
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if (rb->cur_size < rb->size) {
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rb->cur_size = rb->size;
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}
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rb->rd = 0;
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} else {
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rb->rd += size;
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}
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}
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return ptr;
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}
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uint32_t esp_apptrace_rb_read_size_get(esp_apptrace_rb_t *rb)
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{
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uint32_t size = 0;
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if (rb->rd <= rb->wr) {
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// |?R......W??|
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size = rb->wr - rb->rd;
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} else {
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// |?W......R??|
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size = rb->cur_size - rb->rd;
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}
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return size;
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}
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uint32_t esp_apptrace_rb_write_size_get(esp_apptrace_rb_t *rb)
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{
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uint32_t size = 0;
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if (rb->rd <= rb->wr) {
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// |?R......W??|
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size = rb->size - rb->wr;
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if (size && rb->rd == 0) {
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size--;
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}
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} else {
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// |?W......R??|
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size = rb->rd - rb->wr - 1;
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}
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return size;
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}
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