96 lines
3.6 KiB
C++
96 lines
3.6 KiB
C++
/*******************************************************************************
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* Copyright (C) 2025 MINRES Technologies GmbH
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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
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* modification, 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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*
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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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*
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* 3. Neither the name of the copyright holder nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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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* Contributors:
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* eyck@minres.com - initial implementation
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******************************************************************************/
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#ifndef _SEMIHOSTING_H_
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#define _SEMIHOSTING_H_
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#include <chrono>
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#include <functional>
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#include <iss/arch_if.h>
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/*
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* According to:
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* "Semihosting for AArch32 and AArch64, Release 2.0"
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* https://static.docs.arm.com/100863/0200/semihosting.pdf
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* from ARM Ltd.
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*
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* The available semihosting operation numbers passed in A0 are allocated
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* as follows:
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* - 0x00-0x31 Used by ARM.
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* - 0x32-0xFF Reserved for future use by ARM.
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* - 0x100-0x1FF Reserved for user applications. These are not used by ARM.
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* However, if you are writing your own SVC operations, you are advised
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* to use a different SVC number rather than using the semihosted
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* SVC number and these operation type numbers.
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* - 0x200-0xFFFFFFFF Undefined and currently unused. It is recommended
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* that you do not use these.
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*/
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enum class semihosting_syscalls {
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SYS_OPEN = 0x01,
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SYS_CLOSE = 0x02,
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SYS_WRITEC = 0x03,
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SYS_WRITE0 = 0x04,
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SYS_WRITE = 0x05,
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SYS_READ = 0x06,
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SYS_READC = 0x07,
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SYS_ISERROR = 0x08,
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SYS_ISTTY = 0x09,
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SYS_SEEK = 0x0A,
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SYS_FLEN = 0x0C,
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SYS_TMPNAM = 0x0D,
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SYS_REMOVE = 0x0E,
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SYS_RENAME = 0x0F,
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SYS_CLOCK = 0x10,
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SYS_TIME = 0x11,
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SYS_SYSTEM = 0x12,
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SYS_ERRNO = 0x13,
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SYS_GET_CMDLINE = 0x15,
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SYS_HEAPINFO = 0x16,
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SYS_EXIT = 0x18,
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SYS_EXIT_EXTENDED = 0x20,
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SYS_ELAPSED = 0x30,
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SYS_TICKFREQ = 0x31,
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USER_CMD_0x100 = 0x100,
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USER_CMD_0x1FF = 0x1FF,
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};
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template <typename T> struct semihosting_callback {
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std::chrono::high_resolution_clock::time_point timeVar;
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semihosting_callback()
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: timeVar(std::chrono::high_resolution_clock::now()) {}
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void operator()(iss::arch_if* arch_if_ptr, T* call_number, T* parameter);
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};
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template <typename T> using semihosting_cb_t = std::function<void(iss::arch_if*, T*, T*)>;
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#endif
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