| 1 | /* |
|---|
| 2 | * hal_user.h - User-side, architecture specific API definition. |
|---|
| 3 | * |
|---|
| 4 | * Author Alain Greiner (2016,2017) |
|---|
| 5 | * |
|---|
| 6 | * Copyright (c) UPMC Sorbonne Universites |
|---|
| 7 | * |
|---|
| 8 | * This file is part of ALMOS-MKH. |
|---|
| 9 | * |
|---|
| 10 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
|---|
| 11 | * under the terms of the GNU General Public License as published by |
|---|
| 12 | * the Free Software Foundation; version 2.0 of the License. |
|---|
| 13 | * |
|---|
| 14 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
|---|
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
|---|
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|---|
| 17 | * General Public License for more details. |
|---|
| 18 | * |
|---|
| 19 | * You should have received a copy of the GNU General Public License |
|---|
| 20 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
|---|
| 21 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
|---|
| 22 | */ |
|---|
| 23 | |
|---|
| 24 | #ifndef _HAL_USER_H_ |
|---|
| 25 | #define _HAL_USER_H_ |
|---|
| 26 | |
|---|
| 27 | |
|---|
| 28 | ////////////////////////////////////////////////////////////////////////////////////////// |
|---|
| 29 | // User-side, hardware dependant functions API definition. |
|---|
| 30 | // |
|---|
| 31 | // Any architecture specific implementation must implement this API. |
|---|
| 32 | ////////////////////////////////////////////////////////////////////////////////////////// |
|---|
| 33 | |
|---|
| 34 | |
|---|
| 35 | /***************************************************************************************** |
|---|
| 36 | * This function implements the ALMOS-MKH user-side syscall handler. |
|---|
| 37 | * The syscall index and the arguments values are written in the proper core registers |
|---|
| 38 | * to enter the kernel as required by the specific hardware architecture. |
|---|
| 39 | ***************************************************************************************** |
|---|
| 40 | * @ service_num : syscall index (defined in the "shared_sycalls.h" file. |
|---|
| 41 | * @ arg0 : first syscall argument (semantice depends on syscall index). |
|---|
| 42 | * @ arg1 : second syscall argument (semantice depends on syscall index). |
|---|
| 43 | * @ arg2 : third syscall argument (semantice depends on syscall index). |
|---|
| 44 | * @ arg3 : fourth syscall argument (semantice depends on syscall index). |
|---|
| 45 | * @ returned value semantic depends on the syscall index. |
|---|
| 46 | ****************************************************************************************/ |
|---|
| 47 | int hal_user_syscall( int service_num, |
|---|
| 48 | int arg0, |
|---|
| 49 | int arg1, |
|---|
| 50 | int arg2, |
|---|
| 51 | int arg3 ); |
|---|
| 52 | |
|---|
| 53 | /***************************************************************************************** |
|---|
| 54 | * This blocking function atomically adds a positive or negative value to an int |
|---|
| 55 | * shared variable, returning only when atomic add is successful. |
|---|
| 56 | * This function does not use a syscall. |
|---|
| 57 | ***************************************************************************************** |
|---|
| 58 | * @ ptr : pointer on the shared variable. |
|---|
| 59 | * @ val : signed value to add |
|---|
| 60 | * @ return shared variable value before add. |
|---|
| 61 | ****************************************************************************************/ |
|---|
| 62 | int hal_user_atomic_add( int * ptr, |
|---|
| 63 | int val ); |
|---|
| 64 | |
|---|
| 65 | /***************************************************************************************** |
|---|
| 66 | * This blocking function implement a memory fence. |
|---|
| 67 | * It actually flush the calling core write buffer. |
|---|
| 68 | ****************************************************************************************/ |
|---|
| 69 | void hal_user_fence(); |
|---|
| 70 | |
|---|
| 71 | |
|---|
| 72 | #endif // _HAL_USER_H_ |
|---|
