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mactimer: add MAC NMI timer support.

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Support for using the MAC timer, a NMI with a higher priority than the
maskable interrupts, but with similar practical limitations to the MAC layer
handler.
This commit is contained in:
Our Air Quality 2019-04-09 20:19:24 +10:00
parent a487762b2a
commit b4e9ceabd5
3 changed files with 212 additions and 0 deletions
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35
extras/mactimer/mactimer.h Normal file
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/*
* MAC NMI interrupt based timer support.
*
* Copyright (C) 2018 to 2019 OurAirQuality.org
*
* Licensed under the Apache License, Version 2.0, January 2004 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
* http://www.apache.org/licenses/
*
* 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 CONTRIBUTORS 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 WITH THE SOFTWARE.
*
*/
typedef void mactimer_func_t(void *);
typedef struct mactimer_st {
struct mactimer_st *next;
mactimer_func_t *callback;
uint64_t trigger_usec;
void *timer_arg;
} mactimer_t;
void mactimer_setfn(mactimer_t *timer, mactimer_func_t *func, void *parg);
uint64_t mactime_get_count(void);
void mactime_add_pending(mactimer_t *timer, uint64_t count);
void mactimer_arm(mactimer_t *timer, uint64_t count);
void mactimer_init(void);