| 1 | /* |
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| 2 | * hal_vmm.h - Kernel Virtual Memory Manager initialisation |
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| 3 | * |
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| 4 | * Authors Alain Greiner (2016,2017,2018,2019) |
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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_VMM_H_ |
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| 25 | #define _HAL_VMM_H_ |
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| 26 | |
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| 27 | #include <hal_kernel_types.h> |
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| 28 | #include <boot_info.h> |
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| 29 | |
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| 30 | ///////////////////////////////////////////////////////////////////////////////////////// |
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| 31 | // Kernel Virtual Memory Manager initialisation (implementation in hal_vmm.c) |
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| 32 | // |
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| 33 | // Any arch-specific implementation must implement this API. |
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| 34 | ///////////////////////////////////////////////////////////////////////////////////////// |
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| 35 | |
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| 36 | /**** Forward declarations ****/ |
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| 37 | |
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| 38 | struct process_s; |
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| 39 | struct boot_info_s; |
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| 40 | |
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| 41 | /**************************************************************************************** |
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| 42 | * Depending on the hardware architecture, this function creates (i.e. allocates memory |
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| 43 | * and initializes) the VSL (Virtual segments List) and the GPT (Generic Page Table), |
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| 44 | * for all vsegs required by the kernel process. |
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| 45 | **************************************************************************************** |
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| 46 | * @ info : local pointer on boot_info (for kernel segments base & size). |
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| 47 | * @ return 0 if success / return ENOMEM if failure. |
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| 48 | ***************************************************************************************/ |
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| 49 | error_t hal_vmm_kernel_init( struct boot_info_s * info ); |
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| 50 | |
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| 51 | /**************************************************************************************** |
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| 52 | * Depending on the hardware architecture, this function updates the VMM of an user |
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| 53 | * process identified by the <process> argument. It registers in VSL and GPT all |
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| 54 | * kernel vsegs required by this architecture. |
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| 55 | **************************************************************************************** |
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| 56 | * @ process : local pointer on user process descriptor. |
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| 57 | * @ return 0 if success / return ENOMEM if failure. |
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| 58 | ***************************************************************************************/ |
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| 59 | error_t hal_vmm_kernel_update( struct process_s * process ); |
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| 60 | |
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| 61 | /**************************************************************************************** |
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| 62 | * Depending on the hardware architecture, this function displays the current state |
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| 63 | * of the VMM of the process identified by the <process> argument. |
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| 64 | * It displays all valit GPT entries when the <mapping> argument is true. |
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| 65 | **************************************************************************************** |
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| 66 | * @ process_xp : extended pointer on process descriptor. |
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| 67 | * @ mapping : display all mapped GPT entries when true. |
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| 68 | ***************************************************************************************/ |
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| 69 | void hal_vmm_display( xptr_t process_xp, |
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| 70 | bool_t mapping ); |
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| 71 | |
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| 72 | |
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| 73 | |
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| 74 | #endif /* HAL_VMM_H_ */ |
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