forked from ROMEO/obsw
90 lines
3.1 KiB
C
90 lines
3.1 KiB
C
/*
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* Copyright (c) 2001-2003 Swedish Institute of Computer Science.
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* Copyright (C) 2007 - 2022 Xilinx, Inc.
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* Copyright (C) 2022 - 2024 Advanced Micro Devices, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not 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 AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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* OF 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) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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* OF SUCH DAMAGE.
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*
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* This file is part of the lwIP TCP/IP stack.
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*
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*/
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#include "xlwipconfig.h"
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#ifdef __MICROBLAZE__
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#include "mb_interface.h"
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#endif
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#ifdef __riscv
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#include "riscv_interface.h"
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#endif
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#include "arch/cc.h"
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#include "lwip/sys.h"
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/*
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* This optional function does a "fast" critical region protection and returns
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* the previous protection level. This function is only called during very short
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* critical regions. An embedded system which supports ISR-based drivers might
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* want to implement this function by disabling interrupts. Task-based systems
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* might want to implement this by using a mutex or disabling tasking. This
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* function should support recursive calls from the same task or interrupt. In
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* other words, sys_arch_protect() could be called while already protected. In
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* that case the return value indicates that it is already protected.
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* sys_arch_protect() is only required if your port is supporting an operating
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* system.
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*/
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sys_prot_t
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sys_arch_protect()
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{
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sys_prot_t cur;
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#ifdef __MICROBLAZE__
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cur = mfmsr();
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mtmsr(cur & ~0x2);
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#elif __arm__
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cur = mfcpsr();
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mtcpsr(cur | 0xC0);
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#elif __aarch64__
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cur = mfcpsr();
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mtcpsr(cur | 0xC0);
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#endif
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return cur;
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}
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/*
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* This optional function does a "fast" set of critical region protection to the
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* value specified by pval. See the documentation for sys_arch_protect() for
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* more information. This function is only required if your port is supporting
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* an operating system.
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*/
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void
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sys_arch_unprotect(sys_prot_t lev)
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{
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#if defined (__arm__) || defined (__aarch64__)
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mtcpsr(lev);
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#else
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mtmsr(lev);
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#endif
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}
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