diff options
Diffstat (limited to 'ports/risc-v64/gnu/src/tx_timer_interrupt.c')
| -rw-r--r-- | ports/risc-v64/gnu/src/tx_timer_interrupt.c | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/ports/risc-v64/gnu/src/tx_timer_interrupt.c b/ports/risc-v64/gnu/src/tx_timer_interrupt.c new file mode 100644 index 00000000..a92eb5e9 --- /dev/null +++ b/ports/risc-v64/gnu/src/tx_timer_interrupt.c @@ -0,0 +1,135 @@ +/**************************************************************************/ +/* */ +/* Copyright (c) Microsoft Corporation. All rights reserved. */ +/* */ +/* This software is licensed under the Microsoft Software License */ +/* Terms for Microsoft Azure RTOS. Full text of the license can be */ +/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */ +/* and in the root directory of this software. */ +/* */ +/**************************************************************************/ + + +/**************************************************************************/ +/**************************************************************************/ +/** */ +/** ThreadX Component */ +/** */ +/** Timer */ +/** */ +/**************************************************************************/ +/**************************************************************************/ + +#define TX_SOURCE_CODE + +/* Include necessary system files. */ + +#include "tx_api.h" +#include "tx_timer.h" +#include "tx_thread.h" + +/**************************************************************************/ +/* */ +/* FUNCTION RELEASE */ +/* */ +/* _tx_timer_interrupt RISC-V64/GNU */ +/* 6.2.1 */ +/* AUTHOR */ +/* */ +/* Scott Larson, Microsoft Corporation */ +/* */ +/* DESCRIPTION */ +/* */ +/* This function processes the hardware timer interrupt. This */ +/* processing includes incrementing the system clock and checking for */ +/* time slice and/or timer expiration. If either is found, the */ +/* interrupt context save/restore functions are called along with the */ +/* expiration functions. */ +/* */ +/* INPUT */ +/* */ +/* None */ +/* */ +/* OUTPUT */ +/* */ +/* None */ +/* */ +/* CALLS */ +/* */ +/* _tx_timer_expiration_process Timer expiration processing */ +/* _tx_thread_time_slice Time slice interrupted thread */ +/* */ +/* CALLED BY */ +/* */ +/* interrupt vector */ +/* */ +/* RELEASE HISTORY */ +/* */ +/* DATE NAME DESCRIPTION */ +/* */ +/* 03-08-2023 Scott Larson Initial Version 6.2.1 */ +/* */ +/**************************************************************************/ +VOID _tx_timer_interrupt(VOID) +{ + /* Increment system clock. */ + _tx_timer_system_clock++; + + /* Test for time-slice expiration. */ + if (_tx_timer_time_slice) + { + /* Decrement the time_slice. */ + _tx_timer_time_slice--; + + /* Check for expiration. */ + if (_tx_timer_time_slice == 0) + { + + /* Set the time-slice expired flag. */ + _tx_timer_expired_time_slice = TX_TRUE; + } + } + + /* Test for timer expiration. */ + if (*_tx_timer_current_ptr) + { + + /* Set expiration flag. */ + _tx_timer_expired = TX_TRUE; + } + else + { + + /* No timer expired, increment the timer pointer. */ + _tx_timer_current_ptr++; + + /* Check for wrap-around. */ + if (_tx_timer_current_ptr == _tx_timer_list_end) + { + + /* Wrap to beginning of list. */ + _tx_timer_current_ptr = _tx_timer_list_start; + } + } + + /* See if anything has expired. */ + if ((_tx_timer_expired_time_slice) || (_tx_timer_expired)) + { + + /* Did a timer expire? */ + if (_tx_timer_expired) + { + + /* Process timer expiration. */ + _tx_timer_expiration_process(); + } + + /* Did time slice expire? */ + if (_tx_timer_expired_time_slice) + { + + /* Time slice interrupted thread. */ + _tx_thread_time_slice(); + } + } +} |