kopia lustrzana https://github.com/micropython/micropython
85 wiersze
2.7 KiB
C
85 wiersze
2.7 KiB
C
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2022 Damien P. George
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*/
|
|
|
|
#include <assert.h>
|
|
#include "py/mpconfig.h"
|
|
#include "pendsv.h"
|
|
#include "RP2040.h"
|
|
|
|
#if MICROPY_PY_NETWORK_CYW43
|
|
#include "lib/cyw43-driver/src/cyw43_stats.h"
|
|
#endif
|
|
|
|
static pendsv_dispatch_t pendsv_dispatch_table[PENDSV_DISPATCH_NUM_SLOTS];
|
|
static int pendsv_lock;
|
|
|
|
void pendsv_suspend(void) {
|
|
pendsv_lock++;
|
|
}
|
|
|
|
void pendsv_resume(void) {
|
|
pendsv_lock--;
|
|
assert(pendsv_lock >= 0);
|
|
// Run pendsv if needed. Find an entry with a dispatch and call pendsv dispatch
|
|
// with it. If pendsv runs it will service all slots.
|
|
int count = PENDSV_DISPATCH_NUM_SLOTS;
|
|
while (count--) {
|
|
if (pendsv_dispatch_table[count]) {
|
|
pendsv_schedule_dispatch(count, pendsv_dispatch_table[count]);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void pendsv_schedule_dispatch(size_t slot, pendsv_dispatch_t f) {
|
|
assert(pendsv_lock >= 0);
|
|
pendsv_dispatch_table[slot] = f;
|
|
if (pendsv_lock == 0) {
|
|
SCB->ICSR = SCB_ICSR_PENDSVSET_Msk;
|
|
} else {
|
|
#if MICROPY_PY_NETWORK_CYW43
|
|
CYW43_STAT_INC(PENDSV_DISABLED_COUNT);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
// PendSV interrupt handler to perform background processing.
|
|
void PendSV_Handler(void) {
|
|
assert(pendsv_lock == 0);
|
|
|
|
#if MICROPY_PY_NETWORK_CYW43
|
|
CYW43_STAT_INC(PENDSV_RUN_COUNT);
|
|
#endif
|
|
|
|
for (size_t i = 0; i < PENDSV_DISPATCH_NUM_SLOTS; ++i) {
|
|
if (pendsv_dispatch_table[i] != NULL) {
|
|
pendsv_dispatch_t f = pendsv_dispatch_table[i];
|
|
pendsv_dispatch_table[i] = NULL;
|
|
f();
|
|
}
|
|
}
|
|
}
|