| 1 | /*
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| 2 | * hal_kernel_syscall.h - Architecture specific kernel_side syscall handler API definition.
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| 3 | *
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| 4 | * Author Alain Greiner (2016,2017)
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| 5 | *
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| 6 | * Copyright (c) UPMC Sorbonne Universites
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| 7 | *
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| 8 | * This file is part of ALMOS-MKH.
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| 9 | *
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| 10 | * ALMOS-MKH is free software; you can redistribute it and/or modify it
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| 11 | * under the terms of the GNU General Public License as published by
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| 12 | * the Free Software Foundation; version 2.0 of the License.
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| 13 | *
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| 14 | * ALMOS-MKH is distributed in the hope that it will be useful, but
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| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 17 | * General Public License for more details.
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| 18 | *
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| 19 | * You should have received a copy of the GNU General Public License
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| 20 | * along with ALMOS-MKH; if not, write to the Free Software Foundation,
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| 21 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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| 22 | */
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| 23 |
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| 24 | #ifndef _HAL_KERNEL_SYSCALL_H_
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| 25 | #define _HAL_KERNEL_SYSCALL_H_
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| 26 |
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| 27 | #include <hal_kernel_types.h>
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| 28 |
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| 29 | ///////////////////////////////////////////////////////////////////////////////////////
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| 30 | // Kernel-side syscall handler API
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| 31 | //
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| 32 | // This hal_do_syscall() function extract from the calling thread uzone array
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| 33 | // the syscall index, and the four syscall arguments.
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| 34 | // Then it calls the generic do_syscall() function,
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| 35 | // that calls itself the relevant kernel function, depending on the syscall index.
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| 36 | //
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| 37 | // When the generic do_syscall function returns, it saves the return value
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| 38 | // in the UZ_VO slot of the returning thread uzone, and update the UZ_EPC slot.
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| 39 | //
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| 40 | // WARNING: The returning thread can be different from the entering thread
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| 41 | // in the case of a sys_fork() system call.
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| 42 | ///////////////////////////////////////////////////////////////////////////////////////
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| 43 |
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| 44 |
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| 45 | /**************************************************************************************
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| 46 | * This function implements the syscall handler for the TSAR architecture.
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| 47 | *************************************************************************************/
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| 48 | void hal_do_syscall( void );
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| 49 |
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| 50 |
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| 51 | #endif // _HAL_KERNEL_SYSCALL_H_
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