[1] | 1 | /* |
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| 2 | * page.c - physical page related operations implementation |
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| 3 | * |
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| 4 | * Authors Ghassan Almaless (2008,2009,2010,2011,2012) |
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[23] | 5 | * Alain Greiner (2016,2017) |
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[1] | 6 | * |
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| 7 | * Copyright (c) UPMC Sorbonne Universites |
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| 8 | * |
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| 9 | * This file is part of ALMOS-MKH. |
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| 10 | * |
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| 11 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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| 12 | * under the terms of the GNU General Public License as published by |
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| 13 | * the Free Software Foundation; version 2.0 of the License. |
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| 14 | * |
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| 15 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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| 16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 18 | * General Public License for more details. |
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| 19 | * |
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| 20 | * You should have received a copy of the GNU General Public License |
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| 21 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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| 22 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 23 | */ |
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| 24 | |
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[457] | 25 | #include <hal_kernel_types.h> |
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[1] | 26 | #include <hal_special.h> |
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| 27 | #include <hal_atomic.h> |
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| 28 | #include <list.h> |
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[567] | 29 | #include <queuelock.h> |
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[1] | 30 | #include <memcpy.h> |
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| 31 | #include <printk.h> |
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| 32 | #include <vfs.h> |
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| 33 | #include <process.h> |
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| 34 | #include <page.h> |
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| 35 | |
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[567] | 36 | |
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[1] | 37 | //////////////////////////////////////// |
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| 38 | inline void page_init( page_t * page ) |
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| 39 | { |
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| 40 | page->flags = 0; |
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| 41 | page->order = 0; |
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[23] | 42 | page->mapper = NULL; |
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[1] | 43 | page->index = 0; |
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[22] | 44 | page->refcount = 0; |
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[433] | 45 | page->forks = 0; |
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[23] | 46 | |
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[567] | 47 | remote_busylock_init( XPTR( local_cxy , &page->lock ), LOCK_PAGE_STATE ); |
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| 48 | |
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[1] | 49 | list_entry_init( &page->list ); |
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| 50 | } |
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| 51 | |
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| 52 | //////////////////////////////////////////// |
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| 53 | inline void page_set_flag( page_t * page, |
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[23] | 54 | uint32_t value ) |
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[1] | 55 | { |
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[22] | 56 | hal_atomic_or( (uint32_t *)&page->flags , (uint32_t)value ); |
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[1] | 57 | } |
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| 58 | |
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| 59 | ////////////////////////////////////////////// |
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| 60 | inline void page_clear_flag( page_t * page, |
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[23] | 61 | uint32_t value ) |
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[1] | 62 | { |
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[22] | 63 | hal_atomic_and( (uint32_t *)&page->flags , ~((uint32_t)value) ); |
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[1] | 64 | } |
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| 65 | |
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| 66 | ////////////////////////////////////////////// |
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| 67 | inline bool_t page_is_flag( page_t * page, |
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[23] | 68 | uint32_t value ) |
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[1] | 69 | { |
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[23] | 70 | return ( (page->flags & value) ? 1 : 0 ); |
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[1] | 71 | } |
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| 72 | |
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| 73 | //////////////////////////////////////////// |
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| 74 | inline void page_refcount_up( page_t *page ) |
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| 75 | { |
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[23] | 76 | hal_atomic_add( &page->refcount , +1 ); |
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[1] | 77 | } |
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| 78 | |
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| 79 | ////////////////////////////////////////////// |
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| 80 | inline void page_refcount_down( page_t *page ) |
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| 81 | { |
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[23] | 82 | hal_atomic_add( &page->refcount , -1 ); |
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[1] | 83 | } |
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| 84 | |
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| 85 | /////////////////////////////// |
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| 86 | void page_zero( page_t * page ) |
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| 87 | { |
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[315] | 88 | uint32_t size = (1 << page->order) * CONFIG_PPM_PAGE_SIZE; |
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[1] | 89 | |
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[315] | 90 | xptr_t base_xp = ppm_page2base( XPTR( local_cxy , page ) ); |
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[1] | 91 | |
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[315] | 92 | memset( GET_PTR( base_xp ) , 0 , size ); |
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[1] | 93 | } |
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| 94 | |
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[632] | 95 | |
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| 96 | //////////////////////////////////////////////////// |
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| 97 | inline void page_remote_set_flag( xptr_t page_xp, |
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| 98 | uint32_t value ) |
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[1] | 99 | { |
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[632] | 100 | cxy_t page_cxy = GET_CXY( page_xp ); |
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| 101 | page_t * page_ptr = GET_PTR( page_xp ); |
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| 102 | |
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| 103 | hal_remote_atomic_or( XPTR( page_cxy , &page_ptr->flags ) , value ); |
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[1] | 104 | } |
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| 105 | |
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[632] | 106 | ////////////////////////////////////////////////////// |
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| 107 | inline void page_remote_clear_flag( xptr_t page_xp, |
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| 108 | uint32_t value ) |
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| 109 | { |
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| 110 | cxy_t page_cxy = GET_CXY( page_xp ); |
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| 111 | page_t * page_ptr = GET_PTR( page_xp ); |
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| 112 | |
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| 113 | hal_remote_atomic_and( XPTR( page_cxy , &page_ptr->flags ) , value ); |
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| 114 | } |
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| 115 | |
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| 116 | ///////////////////////////////////////////////////// |
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| 117 | inline bool_t page_remote_is_flag( xptr_t page_xp, |
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| 118 | uint32_t value ) |
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| 119 | { |
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| 120 | cxy_t page_cxy = GET_CXY( page_xp ); |
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| 121 | page_t * page_ptr = GET_PTR( page_xp ); |
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| 122 | |
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| 123 | uint32_t flags = hal_remote_l32( XPTR( page_cxy , &page_ptr->flags ) ); |
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| 124 | |
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| 125 | return (flags & value) ? 1 : 0; |
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| 126 | } |
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| 127 | |
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| 128 | ///////////////////////////////////////////////////// |
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| 129 | inline void page_remote_refcount_up( xptr_t page_xp ) |
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| 130 | { |
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| 131 | cxy_t page_cxy = GET_CXY( page_xp ); |
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| 132 | page_t * page_ptr = GET_PTR( page_xp ); |
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| 133 | |
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| 134 | hal_remote_atomic_add( XPTR( page_cxy , &page_ptr->refcount ) , 1 ); |
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| 135 | } |
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| 136 | |
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| 137 | /////////////////////////////////////////////////////// |
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| 138 | inline void page_remote_refcount_down( xptr_t page_xp ) |
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| 139 | { |
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| 140 | cxy_t page_cxy = GET_CXY( page_xp ); |
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| 141 | page_t * page_ptr = GET_PTR( page_xp ); |
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| 142 | |
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| 143 | hal_remote_atomic_add( XPTR( page_cxy , &page_ptr->refcount ) , -1 ); |
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| 144 | } |
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| 145 | |
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| 146 | /////////////////////////////////////////// |
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| 147 | void page_remote_display( xptr_t page_xp ) |
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| 148 | { |
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| 149 | page_t page; // local copy of page decriptor |
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| 150 | |
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| 151 | hal_remote_memcpy( XPTR( local_cxy , &page ) , page_xp , sizeof( page_t ) ); |
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| 152 | |
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| 153 | printk("*** Page %d in cluster %x : ppn %x / flags %x / order %d / refcount %d\n", |
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| 154 | page.index, |
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| 155 | GET_CXY( page_xp ), |
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| 156 | ppm_page2ppn( page_xp ), |
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| 157 | page.flags, |
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| 158 | page.order, |
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| 159 | page.refcount ); |
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| 160 | } |
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| 161 | |
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| 162 | |
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| 163 | |
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