[411] | 1 | /* |
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[587] | 2 | * hal_vmm.c - Virtual Memory Manager Initialisation for TSAR |
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[411] | 3 | * |
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[623] | 4 | * Authors Alain Greiner (2016,2017,2018,2019) |
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[411] | 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 | #include <kernel_config.h> |
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[457] | 25 | #include <hal_kernel_types.h> |
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[411] | 26 | #include <hal_vmm.h> |
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| 27 | #include <hal_gpt.h> |
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[623] | 28 | #include <process.h> |
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[624] | 29 | #include <thread.h> |
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[411] | 30 | #include <vseg.h> |
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| 31 | #include <xlist.h> |
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| 32 | #include <vmm.h> |
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| 33 | #include <remote_rwlock.h> |
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| 34 | |
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| 35 | ////////////////////////////////////////////////////////////////////////////////////////// |
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[623] | 36 | // This file contains the TSAR specific code used to initialize the kernel process VMM, |
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| 37 | // or to update an user process VMM with informations related to the kernel vsegs. |
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| 38 | // As the TSAR architure does not use the DATA MMU, but use only the DATA extension |
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| 39 | // address register to access local and remote kernel data, the kernel VSL contains only |
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| 40 | // one "kcode" segment, and the kernel GPT contains only one big page in PT1[0] slot. |
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[411] | 41 | ////////////////////////////////////////////////////////////////////////////////////////// |
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| 42 | |
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[623] | 43 | // extern global variables |
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[624] | 44 | extern process_t process_zero; |
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| 45 | extern chdev_directory_t chdev_dir; |
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[623] | 46 | |
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| 47 | ////////////////////////////////////////////////////////////////////////////////////////// |
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| 48 | // This function is called by the process_zero_init() function during kernel_init. |
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| 49 | // It initializes the VMM of the kernel proces_zero (containing all kernel threads) |
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[625] | 50 | // in the local cluster: For TSAR, it registers one "kcode" vseg in kernel VSL, |
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| 51 | // and registers one big page in slot[0] of kernel GPT. |
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[623] | 52 | ////////////////////////////////////////////////////////////////////////////////////////// |
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| 53 | error_t hal_vmm_kernel_init( boot_info_t * info ) |
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[411] | 54 | { |
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[623] | 55 | error_t error; |
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[411] | 56 | |
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[623] | 57 | // get pointer on kernel GPT |
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| 58 | gpt_t * gpt = &process_zero.vmm.gpt; |
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| 59 | |
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| 60 | // get cluster identifier |
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| 61 | cxy_t cxy = local_cxy; |
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| 62 | |
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| 63 | // allocate memory for kernel GPT |
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| 64 | error = hal_gpt_create( gpt ); |
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| 65 | |
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| 66 | if( error ) |
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[411] | 67 | { |
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[623] | 68 | printk("\n[PANIC] in %s : cannot allocate kernel GPT in cluster %x\n", |
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| 69 | __FUNCTION__ , cxy ); |
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| 70 | hal_core_sleep(); |
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| 71 | } |
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[411] | 72 | |
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[624] | 73 | #if DEBUG_HAL_VMM |
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| 74 | thread_t * this = CURRENT_THREAD; |
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| 75 | printk("\n[%s] thread[%x,%x] enter in cluster %x / gpt %x\n", |
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| 76 | __FUNCTION__, this->process->pid, this->trdid, local_cxy, gpt ); |
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| 77 | #endif |
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| 78 | |
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[623] | 79 | // compute attr and ppn for one PTE1 |
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[624] | 80 | uint32_t attr = GPT_MAPPED | GPT_READABLE | GPT_CACHABLE | GPT_EXECUTABLE | GPT_GLOBAL; |
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| 81 | uint32_t ppn = cxy << 20; |
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[623] | 82 | |
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[629] | 83 | // set PT1[0] |
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| 84 | hal_gpt_set_pte( XPTR( cxy , gpt ) , 0 , attr , ppn ); |
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[623] | 85 | |
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[624] | 86 | #if DEBUG_HAL_VMM |
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| 87 | printk("\n[%s] thread[%x,%x] created PT1[0] : ppn %x / attr %x\n", |
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| 88 | __FUNCTION__, this->process->pid, this->trdid, ppn, attr ); |
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| 89 | #endif |
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| 90 | |
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[623] | 91 | // create kcode vseg and register it in kernel VSL |
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| 92 | vseg_t * vseg = vmm_create_vseg( &process_zero, |
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[624] | 93 | VSEG_TYPE_KCODE, |
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[623] | 94 | info->kcode_base, |
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| 95 | info->kcode_size, |
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| 96 | 0, 0, // file ofset and file size (unused) |
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| 97 | XPTR_NULL, // no mapper |
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| 98 | local_cxy ); |
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| 99 | if( vseg == NULL ) |
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| 100 | { |
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| 101 | printk("\n[PANIC] in %s : cannot register vseg to VSL in cluster %x\n", |
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| 102 | __FUNCTION__ , cxy ); |
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| 103 | hal_core_sleep(); |
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| 104 | } |
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| 105 | |
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[624] | 106 | #if DEBUG_HAL_VMM |
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| 107 | printk("\n[%s] thread[%x,%x] registered kcode vseg[%x,%x]\n", |
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| 108 | __FUNCTION__, this->process->pid, this->trdid, info->kcode_base, info->kcode_size ); |
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| 109 | hal_vmm_display( &process_zero , true ); |
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| 110 | #endif |
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[623] | 111 | |
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[624] | 112 | return 0; |
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| 113 | |
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[625] | 114 | } // end hal_vmm_kernel_init() |
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[624] | 115 | |
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[623] | 116 | ////////////////////////////////////////////////////////////////////////////////////////// |
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[625] | 117 | // This function registers in the VMM of an user process identified by the <process> |
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| 118 | // argument all required kernel vsegs. |
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| 119 | // For TSAR, it registers in the user VSL the "kcode" vseg, from the local kernel VSL, |
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| 120 | // and register in the user GPT the big page[0] from the local kernel GPT. |
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[623] | 121 | ////////////////////////////////////////////////////////////////////////////////////////// |
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| 122 | error_t hal_vmm_kernel_update( process_t * process ) |
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| 123 | { |
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| 124 | uint32_t attr; |
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| 125 | uint32_t ppn; |
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| 126 | |
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[625] | 127 | // get cluster identifier |
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| 128 | cxy_t cxy = local_cxy; |
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| 129 | |
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[624] | 130 | #if DEBUG_HAL_VMM |
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| 131 | thread_t * this = CURRENT_THREAD; |
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| 132 | printk("\n[%s] thread[%x,%x] enter in cluster %x \n", |
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[625] | 133 | __FUNCTION__, this->process->pid, this->trdid, cxy ); |
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| 134 | hal_vmm_display( &process_zero , true ); |
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[624] | 135 | hal_vmm_display( process , true ); |
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| 136 | #endif |
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[623] | 137 | |
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[625] | 138 | // get extended pointer on local kernel GPT |
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[624] | 139 | xptr_t k_gpt_xp = XPTR( cxy , &process_zero.vmm.gpt ); |
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| 140 | |
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| 141 | // get ppn and attributes from slot[0] of kernel GPT |
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| 142 | hal_gpt_get_pte( k_gpt_xp , 0 , &attr , &ppn ); |
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| 143 | |
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| 144 | #if DEBUG_HAL_VMM |
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| 145 | printk("\n[%s] thread[%x,%x] get PT1[0] ( ppn %x / attr %x ) from kernel GPT\n", |
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| 146 | __FUNCTION__, this->process->pid, this->trdid, ppn, attr ); |
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| 147 | #endif |
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| 148 | |
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[623] | 149 | // get extended pointer on user GPT |
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[624] | 150 | xptr_t u_gpt_xp = XPTR( cxy , &process->vmm.gpt ); |
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[623] | 151 | |
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| 152 | // update user GPT : set PTE1 in slot[0] |
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[629] | 153 | hal_gpt_set_pte( u_gpt_xp , 0 , attr , ppn ); |
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[623] | 154 | |
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[624] | 155 | #if DEBUG_HAL_VMM |
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| 156 | printk("\n[%s] thread[%x,%x] registered PT1[0] ( ppn %x / attr %x ) to user GPT\n", |
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| 157 | __FUNCTION__, this->process->pid, this->trdid, ppn, attr ); |
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| 158 | #endif |
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| 159 | |
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[623] | 160 | // get pointer on the unique vseg registered in kernel VSL |
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[624] | 161 | xptr_t root_xp = XPTR( cxy , &process_zero.vmm.vsegs_root ); |
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| 162 | xptr_t vseg_xp = XLIST_FIRST( root_xp , vseg_t , xlist ); |
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| 163 | vseg_t * vseg = GET_PTR( vseg_xp ); |
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[411] | 164 | |
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[623] | 165 | // check vsegs_nr |
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[624] | 166 | assert( (process_zero.vmm.vsegs_nr == 1 ) , |
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| 167 | "bad vsegs number in kernel VSL = %d\n", process_zero.vmm.vsegs_nr ); |
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[411] | 168 | |
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[623] | 169 | // update user VSL : register one new vseg for kcode |
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| 170 | vseg_t * new = vmm_create_vseg( process, |
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| 171 | vseg->type, |
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| 172 | vseg->min, |
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| 173 | vseg->max - vseg->min, |
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[633] | 174 | 0, 0, // file ofset and file size (unused) |
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| 175 | XPTR_NULL, // no mapper |
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[623] | 176 | local_cxy ); |
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| 177 | if( new == NULL ) |
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| 178 | { |
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[624] | 179 | printk("\n[ERROR] in %s : cannot update user VSL in cluster %x\n", |
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[623] | 180 | __FUNCTION__ , cxy ); |
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| 181 | return -1; |
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| 182 | } |
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[411] | 183 | |
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[624] | 184 | #if DEBUG_HAL_VMM |
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| 185 | printk("\n[%s] thread[%x,%x] created vseg %s ( base %x / size %x ) to user VSL\n", |
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| 186 | __FUNCTION__, this->process->pid, this->trdid, |
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| 187 | vseg_type_str(vseg->type) , vseg->min, (vseg->max - vseg->min) ); |
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| 188 | hal_vmm_display( process , true ); |
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| 189 | #endif |
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[411] | 190 | |
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[624] | 191 | return 0; |
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| 192 | |
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| 193 | } // end hal_vmm_kernel_update() |
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| 194 | |
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| 195 | ////////////////////////////////////////// |
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| 196 | void hal_vmm_display( process_t * process, |
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| 197 | bool_t mapping ) |
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| 198 | { |
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[625] | 199 | // get pointer on process VMM |
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[624] | 200 | vmm_t * vmm = &process->vmm; |
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| 201 | |
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| 202 | // get pointers on TXT0 chdev |
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| 203 | xptr_t txt0_xp = chdev_dir.txt_tx[0]; |
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| 204 | cxy_t txt0_cxy = GET_CXY( txt0_xp ); |
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| 205 | chdev_t * txt0_ptr = GET_PTR( txt0_xp ); |
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| 206 | |
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[629] | 207 | // build extended pointer on TXT0 lock and VSL lock |
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[625] | 208 | xptr_t txt_lock_xp = XPTR( txt0_cxy , &txt0_ptr->wait_lock ); |
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| 209 | xptr_t vsl_lock_xp = XPTR( local_cxy , &vmm->vsl_lock ); |
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[624] | 210 | |
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[625] | 211 | // get root of vsegs list |
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| 212 | xptr_t root_xp = XPTR( local_cxy , &vmm->vsegs_root ); |
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[624] | 213 | |
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[625] | 214 | // get the locks protecting TXT0, VSL, and GPT |
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| 215 | remote_rwlock_rd_acquire( vsl_lock_xp ); |
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| 216 | remote_busylock_acquire( txt_lock_xp ); |
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[624] | 217 | |
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[625] | 218 | nolock_printk("\n***** VSL and GPT for process %x in cluster %x / PT1 = %x\n", |
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| 219 | process->pid , local_cxy , vmm->gpt.ptr ); |
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[624] | 220 | |
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[625] | 221 | if( xlist_is_empty( root_xp ) ) |
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[624] | 222 | { |
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[625] | 223 | nolock_printk(" ... no vsegs registered\n"); |
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| 224 | } |
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| 225 | else // scan the list of vsegs |
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| 226 | { |
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| 227 | xptr_t iter_xp; |
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| 228 | xptr_t vseg_xp; |
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| 229 | vseg_t * vseg; |
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[624] | 230 | |
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[625] | 231 | XLIST_FOREACH( root_xp , iter_xp ) |
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[624] | 232 | { |
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[625] | 233 | vseg_xp = XLIST_ELEMENT( iter_xp , vseg_t , xlist ); |
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| 234 | vseg = GET_PTR( vseg_xp ); |
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[624] | 235 | |
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[625] | 236 | nolock_printk(" - %s : base = %X / size = %X / npages = %d\n", |
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| 237 | vseg_type_str(vseg->type), vseg->min, vseg->max - vseg->min, vseg->vpn_size ); |
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| 238 | |
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| 239 | if( mapping ) |
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[624] | 240 | { |
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[625] | 241 | vpn_t vpn = vseg->vpn_base; |
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| 242 | vpn_t vpn_max = vpn + vseg->vpn_size; |
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| 243 | ppn_t ppn; |
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| 244 | uint32_t attr; |
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[624] | 245 | |
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[625] | 246 | while( vpn < vpn_max ) // scan the PTEs |
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[624] | 247 | { |
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[625] | 248 | hal_gpt_get_pte( XPTR( local_cxy , &vmm->gpt ) , vpn , &attr , &ppn ); |
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| 249 | |
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| 250 | if( attr & GPT_MAPPED ) |
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[624] | 251 | { |
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[625] | 252 | if( attr & GPT_SMALL ) |
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| 253 | { |
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| 254 | nolock_printk(" . SMALL : vpn = %X / attr = %X / ppn = %X\n", |
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| 255 | vpn , attr , ppn ); |
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| 256 | vpn++; |
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| 257 | } |
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| 258 | else |
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| 259 | { |
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| 260 | nolock_printk(" . BIG : vpn = %X / attr = %X / ppn = %X\n", |
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| 261 | vpn , attr , ppn ); |
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| 262 | vpn += 512; |
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| 263 | } |
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[624] | 264 | } |
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| 265 | else |
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| 266 | { |
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[625] | 267 | vpn++; |
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[624] | 268 | } |
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| 269 | } |
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| 270 | } |
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| 271 | } |
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| 272 | } |
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| 273 | |
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[625] | 274 | // release locks |
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| 275 | remote_busylock_release( txt_lock_xp ); |
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| 276 | remote_rwlock_rd_release( vsl_lock_xp ); |
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[624] | 277 | |
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| 278 | } // hal_vmm_display() |
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| 279 | |
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