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90 lines
3.1 KiB
C
90 lines
3.1 KiB
C
/*
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* Copyright (c) 2011, Himanshu Chauhan. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. No personal names or organizations' names associated with the
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* Atomthreads project may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE ATOMTHREADS PROJECT AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __ATOM_PORT_H
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#define __ATOM_PORT_H
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/* Required number of system ticks per second (normally 100 for 10ms tick) */
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#define SYSTEM_TICKS_PER_SEC 100
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/**
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* Definition of NULL. stddef.h not available on this platform.
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*/
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#define NULL ((void *)(0))
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/* Size of each stack entry / stack alignment size (32 bits on MIPS) */
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#define STACK_ALIGN_SIZE sizeof(uint32_t)
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/**
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* Architecture-specific types.
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* Provide stdint.h style types.
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*/
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#define uint8_t unsigned char
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#define uint16_t unsigned short
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#define uint32_t unsigned long
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#define uint64_t unsigned long long
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#define int8_t char
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#define int16_t short
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#define int32_t long
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#define int64_t long long
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#define size_t unsigned long
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#define POINTER void *
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#define UINT32 uint32_t
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/**
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* Critical region protection: this should disable interrupts
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* to protect OS data structures during modification. It must
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* allow nested calls, which means that interrupts should only
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* be re-enabled when the outer CRITICAL_END() is reached.
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*/
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extern uint32_t at_preempt_count;
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#define CRITICAL_STORE uint32_t status_reg
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#define CRITICAL_START() \
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do { \
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__asm__ __volatile__("di %0\t\n" \
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"ehb\t\n" \
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:"=r"(status_reg)); \
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}while(0);
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#define CRITICAL_END() \
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do { \
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__asm__ __volatile__("mtc0 %0, $12\t\n" \
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"nop\t\n" \
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"ehb\t\n" \
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::"r"(status_reg)); \
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}while(0);
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/* Uncomment to enable stack-checking */
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/* #define ATOM_STACK_CHECKING */
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#endif /* __ATOM_PORT_H */
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