| 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 (2016,2017,2018,2019,2020)
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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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