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Merge pull request #3 from forg0ne/port/NIOS-II
Added the Altera NIOS-II GNU port.
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‎Ports/NiosII/GNU/os_cpu.h‎

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/*
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*********************************************************************************************************
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* uC/OS-II
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* The Real-Time Kernel
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*
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* Copyright 1992-2020 Silicon Laboratories Inc. www.silabs.com
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*
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* SPDX-License-Identifier: APACHE-2.0
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*
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* This software is subject to an open source license and is distributed by
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* Silicon Laboratories Inc. pursuant to the terms of the Apache License,
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* Version 2.0 available at www.apache.org/licenses/LICENSE-2.0.
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*
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*********************************************************************************************************
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*/
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/*
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*********************************************************************************************************
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*
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* Altera NiosII Port
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*
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* Filename : os_cpu.h
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* Version : V2.93.00
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*********************************************************************************************************
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* For : Altera NiosII
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* Toolchain : GNU - Altera NiosII
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*********************************************************************************************************
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*/
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/******************************************************************************
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* *
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* License Agreement *
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* *
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* Copyright (c) 2003-5 Altera Corporation, San Jose, California, USA. *
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* All rights reserved. *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the "Software"), *
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* to deal in the Software without restriction, including without limitation *
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* the rights to use, copy, modify, merge, publish, distribute, sublicense, *
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* and/or sell copies of the Software, and to permit persons to whom the *
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* Software is 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 *
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER *
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* DEALINGS IN THE SOFTWARE. *
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* *
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* This agreement shall be governed in all respects by the laws of the State *
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* of California and by the laws of the United States of America. *
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* *
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* Altera does not recommend, suggest or require that this reference design *
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* file be used in conjunction or combination with any other product. *
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******************************************************************************/
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#ifndef __OS_CPU_H__
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#define __OS_CPU_H__
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#ifdef __cplusplus
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extern "C"
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{
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#endif /* __cplusplus */
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#include "sys/alt_irq.h"
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#ifdef OS_CPU_GLOBALS
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#define OS_CPU_EXT
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#else
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#define OS_CPU_EXT extern
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#endif
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/*
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*********************************************************************************************************
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* DATA TYPES
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* (Compiler Specific)
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*********************************************************************************************************
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*/
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/* This is the definition for Nios32. */
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typedef unsigned char BOOLEAN;
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typedef unsigned char INT8U; /* Unsigned 8 bit quantity */
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typedef signed char INT8S; /* Signed 8 bit quantity */
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typedef unsigned short INT16U; /* Unsigned 16 bit quantity */
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typedef signed short INT16S; /* Signed 16 bit quantity */
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typedef unsigned long INT32U; /* Unsigned 32 bit quantity */
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typedef signed long INT32S; /* Signed 32 bit quantity */
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typedef float FP32; /* Single precision floating point */
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typedef double FP64; /* Double precision floating point */
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typedef unsigned int OS_STK; /* Each stack entry is 32-bits */
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/*
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*********************************************************************************************************
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* MACROS
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*********************************************************************************************************
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*/
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#define OS_STK_GROWTH 1 /* Stack grows from HIGH to LOW memory */
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#define OS_TASK_SW OSCtxSw
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/*
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*********************************************************************************************************
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* Disable and Enable Interrupts - 2 methods
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*
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* Method #1: Disable/Enable interrupts using simple instructions. After critical
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* section, interrupts will be enabled even if they were disabled before
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* entering the critical section.
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*
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* Method #2: Disable/Enable interrupts by preserving the state of interrupts. In
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* other words, if interrupts were disabled before entering the critical
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* section, they will be disabled when leaving the critical section.
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*
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* Method #3: Disable/Enable interrupts by preserving the state of interrupts. Generally speaking you
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* would store the state of the interrupt disable flag in the local variable 'cpu_sr' and then
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* disable interrupts. 'cpu_sr' is allocated in all of uC/OS-II's functions that need to
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* disable interrupts. You would restore the interrupt disable state by copying back 'cpu_sr'
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* into the CPU's status register.
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*
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*********************************************************************************************************
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*/
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#define OS_CRITICAL_METHOD 3
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#if OS_CRITICAL_METHOD == 1
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#error OS_CRITICAL_METHOD == 1 not supported, please use method 3 instead.
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#endif
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#if OS_CRITICAL_METHOD == 2
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#error OS_CRITICAL_METHOD == 2 not supported, please use method 3 instead.
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#endif
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#if OS_CRITICAL_METHOD == 3
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#define OS_CPU_SR alt_irq_context
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#define OS_ENTER_CRITICAL() \
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cpu_sr = alt_irq_disable_all ()
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#define OS_EXIT_CRITICAL() \
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alt_irq_enable_all (cpu_sr);
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#endif
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/*
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*********************************************************************************************************
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* PROTOTYPES
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*********************************************************************************************************
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*/
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void OSStartHighRdy(void);
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void OSCtxSw (void);
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void OSIntCtxSw (void);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __OS_CPU_H__ */

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