60 lines
2.2 KiB
C
60 lines
2.2 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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* 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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#ifndef MICROPY_INCLUDED_ESP8266_XTIRQ_H
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#define MICROPY_INCLUDED_ESP8266_XTIRQ_H
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#include <stdint.h>
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// returns the value of "intlevel" from the PS register
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static inline uint32_t query_irq(void) {
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uint32_t ps;
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__asm__ volatile ("rsr %0, ps" : "=a" (ps));
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return ps & 0xf;
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}
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// irqs with a priority value lower or equal to "intlevel" will be disabled
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// "intlevel" should be between 0 and 15 inclusive, and should be an integer
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static inline uint32_t raise_irq_pri(uint32_t intlevel) {
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uint32_t old_ps;
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__asm__ volatile ("rsil %0, %1" : "=a" (old_ps) : "I" (intlevel));
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return old_ps;
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}
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// "ps" should be the value returned from raise_irq_pri
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static inline void restore_irq_pri(uint32_t ps) {
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__asm__ volatile ("wsr %0, ps; rsync" : : "a" (ps));
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}
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static inline uint32_t disable_irq(void) {
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return raise_irq_pri(15);
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}
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static inline void enable_irq(uint32_t irq_state) {
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restore_irq_pri(irq_state);
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}
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#endif // MICROPY_INCLUDED_ESP8266_XTIRQ_H
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