| 1 | /* |
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| 2 | * devfs.c - DEVFS File system API implementation. |
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| 3 | * |
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| 4 | * Author Mohamed Lamine Karaoui (2014,2015) |
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| 5 | * Alain Greiner (2016,2017) |
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| 6 | * |
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| 7 | * Copyright (c) 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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| 25 | #include <hal_kernel_types.h> |
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| 26 | #include <hal_special.h> |
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| 27 | #include <hal_uspace.h> |
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| 28 | #include <printk.h> |
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| 29 | #include <chdev.h> |
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| 30 | #include <thread.h> |
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| 31 | #include <dev_txt.h> |
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| 32 | #include <cluster.h> |
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| 33 | #include <vfs.h> |
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| 34 | #include <kmem.h> |
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| 35 | #include <devfs.h> |
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| 36 | |
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| 37 | ///////////////////////////////////////////////////////////////////////////////////////// |
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| 38 | // Extern variables |
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| 39 | ///////////////////////////////////////////////////////////////////////////////////////// |
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| 40 | |
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| 41 | extern vfs_ctx_t fs_context[]; // allocated in kernel_init.c |
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| 42 | extern chdev_directory_t chdev_dir; // allocated in kernel_init.c |
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| 43 | |
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| 44 | #if (DEBUG_SYS_READ & 1) |
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| 45 | extern uint32_t enter_devfs_read; |
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| 46 | extern uint32_t exit_devfs_read; |
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| 47 | #endif |
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| 48 | |
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| 49 | #if (DEBUG_SYS_WRITE & 1) |
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| 50 | extern uint32_t enter_devfs_write; |
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| 51 | extern uint32_t exit_devfs_write; |
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| 52 | #endif |
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| 53 | |
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| 54 | ///////////////////////////////////// |
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| 55 | devfs_ctx_t * devfs_ctx_alloc( void ) |
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| 56 | { |
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| 57 | kmem_req_t req; |
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| 58 | |
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| 59 | req.type = KMEM_DEVFS_CTX; |
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| 60 | req.size = sizeof(devfs_ctx_t); |
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| 61 | req.flags = AF_KERNEL | AF_ZERO; |
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| 62 | |
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| 63 | return (devfs_ctx_t *)kmem_alloc( &req ); |
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| 64 | } |
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| 65 | |
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| 66 | ///////////////////////////////////////////// |
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| 67 | void devfs_ctx_init( devfs_ctx_t * devfs_ctx, |
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| 68 | xptr_t devfs_dev_inode_xp, |
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| 69 | xptr_t devfs_external_inode_xp ) |
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| 70 | { |
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| 71 | devfs_ctx->dev_inode_xp = devfs_dev_inode_xp; |
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| 72 | devfs_ctx->external_inode_xp = devfs_external_inode_xp; |
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| 73 | |
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| 74 | fs_context[FS_TYPE_DEVFS].extend = devfs_ctx; |
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| 75 | } |
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| 76 | |
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| 77 | ///////////////////////////////////////////////// |
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| 78 | void devfs_ctx_destroy( devfs_ctx_t * devfs_ctx ) |
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| 79 | { |
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| 80 | kmem_req_t req; |
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| 81 | |
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| 82 | req.type = KMEM_DEVFS_CTX; |
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| 83 | req.ptr = devfs_ctx; |
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| 84 | kmem_free( &req ); |
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| 85 | } |
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| 86 | |
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| 87 | ///////////////////////////////////////////////// |
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| 88 | void devfs_global_init( xptr_t parent_inode_xp, |
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| 89 | xptr_t * devfs_dev_inode_xp, |
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| 90 | xptr_t * devfs_external_inode_xp ) |
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| 91 | { |
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| 92 | error_t error; |
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| 93 | |
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| 94 | // creates DEVFS "dev" inode in cluster 0 |
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| 95 | error = vfs_add_child_in_parent( 0, // cxy |
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| 96 | INODE_TYPE_DIR, |
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| 97 | FS_TYPE_DEVFS, |
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| 98 | parent_inode_xp, |
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| 99 | "dev", |
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| 100 | NULL, |
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| 101 | devfs_dev_inode_xp ); |
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| 102 | |
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| 103 | assert( (error == 0) , "cannot create <dev>\n" ); |
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| 104 | |
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| 105 | #if DEBUG_DEVFS_INIT |
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| 106 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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| 107 | if( DEBUG_DEVFS_INIT < cycle ) |
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| 108 | printk("\n[DBG] %s : thread %x in process %x created <dev> inode / cycle %d\n", |
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| 109 | __FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid ,cycle ); |
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| 110 | #endif |
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| 111 | |
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| 112 | // create DEVFS "external" inode in cluster 0 |
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| 113 | error = vfs_add_child_in_parent( 0, // cxy |
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| 114 | INODE_TYPE_DIR, |
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| 115 | FS_TYPE_DEVFS, |
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| 116 | *devfs_dev_inode_xp, |
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| 117 | "external", |
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| 118 | NULL, |
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| 119 | devfs_external_inode_xp ); |
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| 120 | |
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| 121 | assert( (error == 0) , "cannot create <external>\n" ); |
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| 122 | |
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| 123 | #if DEBUG_DEVFS_INIT |
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| 124 | cycle = (uint32_t)hal_get_cycles(); |
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| 125 | if( DEBUG_DEVFS_INIT < cycle ) |
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| 126 | printk("\n[DBG] %s : thread %x in process %x created <external> inode / cycle %d\n", |
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| 127 | __FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid , cycle ); |
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| 128 | #endif |
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| 129 | |
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| 130 | } |
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| 131 | |
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| 132 | /////////////////////////////////////////////////// |
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| 133 | void devfs_local_init( xptr_t devfs_dev_inode_xp, |
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| 134 | xptr_t devfs_external_inode_xp, |
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| 135 | xptr_t * devfs_internal_inode_xp ) |
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| 136 | { |
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| 137 | char node_name[16]; |
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| 138 | xptr_t chdev_xp; |
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| 139 | cxy_t chdev_cxy; |
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| 140 | chdev_t * chdev_ptr; |
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| 141 | xptr_t inode_xp; |
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| 142 | uint32_t channel; |
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| 143 | |
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| 144 | // create "internal" directory |
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| 145 | snprintf( node_name , 16 , "internal_%x" , local_cxy ); |
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| 146 | vfs_add_child_in_parent( local_cxy, |
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| 147 | INODE_TYPE_DIR, |
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| 148 | FS_TYPE_DEVFS, |
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| 149 | devfs_dev_inode_xp, |
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| 150 | node_name, |
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| 151 | NULL, |
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| 152 | devfs_internal_inode_xp ); |
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| 153 | #if DEBUG_DEVFS_INIT |
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| 154 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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| 155 | trdid_t trdid = CURRENT_THREAD->trdid; |
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| 156 | pid_t pid = CURRENT_THREAD->process->pid; |
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| 157 | if( DEBUG_DEVFS_INIT < cycle ) |
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| 158 | printk("\n[DBG] %s : thread %x in process %x created <%s> in cluster %x / cycle %d\n", |
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| 159 | __FUNCTION__, trdid, pid, node_name, local_cxy, cycle ); |
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| 160 | #endif |
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| 161 | |
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| 162 | // create MMC chdev inode |
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| 163 | chdev_xp = chdev_dir.mmc[local_cxy]; |
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| 164 | if( chdev_xp != XPTR_NULL) |
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| 165 | { |
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| 166 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
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| 167 | vfs_add_child_in_parent( local_cxy, |
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| 168 | INODE_TYPE_DEV, |
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| 169 | FS_TYPE_DEVFS, |
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| 170 | *devfs_internal_inode_xp, |
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| 171 | chdev_ptr->name, |
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| 172 | GET_PTR( chdev_xp ), |
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| 173 | &inode_xp ); |
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| 174 | #if DEBUG_DEVFS_INIT |
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| 175 | cycle = (uint32_t)hal_get_cycles(); |
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| 176 | if( DEBUG_DEVFS_INIT < cycle ) |
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| 177 | printk("\n[DBG] %s : thread %x in process %x created <mmc> inode in cluster %x\n", |
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| 178 | __FUNCTION__, trdid, pid, local_cxy, cycle ); |
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| 179 | #endif |
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| 180 | |
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| 181 | } |
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| 182 | |
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| 183 | // create DMA chdev inodes (one DMA channel per core) |
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| 184 | for( channel = 0 ; channel < LOCAL_CLUSTER->cores_nr ; channel++ ) |
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| 185 | { |
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| 186 | chdev_xp = chdev_dir.dma[channel]; |
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| 187 | if( chdev_xp != XPTR_NULL) |
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| 188 | { |
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| 189 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
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| 190 | vfs_add_child_in_parent( local_cxy, |
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| 191 | INODE_TYPE_DEV, |
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| 192 | FS_TYPE_DEVFS, |
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| 193 | *devfs_internal_inode_xp, |
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| 194 | chdev_ptr->name, |
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| 195 | GET_PTR( chdev_xp ), |
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| 196 | &inode_xp ); |
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| 197 | #if DEBUG_DEVFS_INIT |
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| 198 | cycle = (uint32_t)hal_get_cycles(); |
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| 199 | if( DEBUG_DEVFS_INIT < cycle ) |
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| 200 | printk("\n[DBG] %s : thread %x in process %x created <dma[%d]> inode in cluster %x\n", |
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| 201 | __FUNCTION__, trdid, pid, channel, local_cxy, cycle ); |
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| 202 | #endif |
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| 203 | } |
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| 204 | } |
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| 205 | |
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| 206 | // create an IOB inode in cluster containing IOB chdev |
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| 207 | chdev_xp = chdev_dir.iob; |
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| 208 | if( chdev_xp != XPTR_NULL ) |
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| 209 | { |
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| 210 | chdev_cxy = GET_CXY( chdev_xp ); |
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| 211 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
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| 212 | if( chdev_cxy == local_cxy ) |
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| 213 | { |
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| 214 | vfs_add_child_in_parent( local_cxy, |
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| 215 | INODE_TYPE_DEV, |
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| 216 | FS_TYPE_DEVFS, |
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| 217 | devfs_external_inode_xp, |
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| 218 | chdev_ptr->name, |
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| 219 | GET_PTR( chdev_xp ), |
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| 220 | &inode_xp ); |
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| 221 | #if DEBUG_DEVFS_INIT |
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| 222 | cycle = (uint32_t)hal_get_cycles(); |
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| 223 | if( DEBUG_DEVFS_INIT < cycle ) |
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| 224 | printk("\n[DBG] %s : thread %x in process %x created <iob> inode in cluster %x\n", |
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| 225 | __FUNCTION__, trdid, pid, local_cxy, cycle ); |
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| 226 | #endif |
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| 227 | } |
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| 228 | } |
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| 229 | |
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| 230 | // create a PIC inode in cluster containing PIC chdev |
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| 231 | chdev_xp = chdev_dir.pic; |
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| 232 | if( chdev_xp != XPTR_NULL ) |
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| 233 | { |
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| 234 | chdev_cxy = GET_CXY( chdev_xp ); |
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| 235 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
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| 236 | if( chdev_cxy == local_cxy ) |
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| 237 | { |
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| 238 | vfs_add_child_in_parent( local_cxy, |
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| 239 | INODE_TYPE_DEV, |
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| 240 | FS_TYPE_DEVFS, |
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| 241 | devfs_external_inode_xp, |
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| 242 | chdev_ptr->name, |
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| 243 | GET_PTR( chdev_xp ), |
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| 244 | &inode_xp ); |
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| 245 | #if DEBUG_DEVFS_INIT |
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| 246 | cycle = (uint32_t)hal_get_cycles(); |
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| 247 | if( DEBUG_DEVFS_INIT < cycle ) |
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| 248 | printk("\n[DBG] %s : thread %x in process %x created <pic> inode in cluster %x\n", |
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| 249 | __FUNCTION__, trdid, pid, local_cxy, cycle ); |
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| 250 | #endif |
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| 251 | } |
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| 252 | } |
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| 253 | |
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| 254 | // create a TXT_RX inode in each cluster containing a TXT_RX chdev |
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| 255 | for( channel = 0 ; channel < CONFIG_MAX_TXT_CHANNELS ; channel++ ) |
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| 256 | { |
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| 257 | chdev_xp = chdev_dir.txt_rx[channel]; |
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| 258 | if( chdev_xp != XPTR_NULL ) |
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| 259 | { |
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| 260 | chdev_cxy = GET_CXY( chdev_xp ); |
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| 261 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
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| 262 | if( chdev_cxy == local_cxy ) |
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| 263 | { |
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| 264 | vfs_add_child_in_parent( local_cxy, |
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| 265 | INODE_TYPE_DEV, |
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| 266 | FS_TYPE_DEVFS, |
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| 267 | devfs_external_inode_xp, |
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| 268 | chdev_ptr->name, |
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| 269 | GET_PTR( chdev_xp ), |
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| 270 | &inode_xp ); |
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| 271 | #if DEBUG_DEVFS_INIT |
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| 272 | cycle = (uint32_t)hal_get_cycles(); |
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| 273 | if( DEBUG_DEVFS_INIT < cycle ) |
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| 274 | printk("\n[DBG] %s : thread %x in process %x created <txt_rx[%d]> inode in cluster %x\n", |
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| 275 | __FUNCTION__, trdid, pid, channel, local_cxy, cycle ); |
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| 276 | #endif |
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| 277 | } |
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| 278 | } |
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| 279 | } |
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| 280 | |
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| 281 | // create a TXT_TX inode in each cluster containing a TXT_TX chdev |
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| 282 | for( channel = 0 ; channel < CONFIG_MAX_TXT_CHANNELS ; channel++ ) |
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| 283 | { |
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| 284 | chdev_xp = chdev_dir.txt_tx[channel]; |
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| 285 | if( chdev_xp != XPTR_NULL ) |
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| 286 | { |
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| 287 | chdev_cxy = GET_CXY( chdev_xp ); |
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| 288 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
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| 289 | if( chdev_cxy == local_cxy ) |
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| 290 | { |
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| 291 | vfs_add_child_in_parent( local_cxy, |
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| 292 | INODE_TYPE_DEV, |
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| 293 | FS_TYPE_DEVFS, |
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| 294 | devfs_external_inode_xp, |
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| 295 | chdev_ptr->name, |
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| 296 | GET_PTR( chdev_xp ), |
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| 297 | &inode_xp ); |
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| 298 | #if DEBUG_DEVFS_INIT |
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| 299 | cycle = (uint32_t)hal_get_cycles(); |
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| 300 | if( DEBUG_DEVFS_INIT < cycle ) |
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| 301 | printk("\n[DBG] %s : thread %x in process %x created <txt_tx[%d]> inode in cluster %x\n", |
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| 302 | __FUNCTION__, trdid, pid, channel, local_cxy, cycle ); |
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| 303 | #endif |
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| 304 | } |
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| 305 | } |
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| 306 | } |
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| 307 | |
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| 308 | // create an IOC inode in each cluster containing an IOC chdev |
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| 309 | for( channel = 0 ; channel < CONFIG_MAX_IOC_CHANNELS ; channel++ ) |
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| 310 | { |
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| 311 | chdev_xp = chdev_dir.ioc[channel]; |
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| 312 | if( chdev_xp != XPTR_NULL ) |
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| 313 | { |
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| 314 | chdev_cxy = GET_CXY( chdev_xp ); |
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| 315 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
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| 316 | if( chdev_cxy == local_cxy ) |
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| 317 | { |
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| 318 | vfs_add_child_in_parent( local_cxy, |
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| 319 | INODE_TYPE_DEV, |
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| 320 | FS_TYPE_DEVFS, |
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| 321 | devfs_external_inode_xp, |
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| 322 | chdev_ptr->name, |
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| 323 | GET_PTR( chdev_xp ), |
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| 324 | &inode_xp ); |
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| 325 | #if DEBUG_DEVFS_INIT |
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| 326 | cycle = (uint32_t)hal_get_cycles(); |
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| 327 | if( DEBUG_DEVFS_INIT < cycle ) |
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| 328 | printk("\n[DBG] %s : thread %x in process %x created <ioc[%d]> inode in cluster %x\n", |
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| 329 | __FUNCTION__, trdid, pid, channel, local_cxy, cycle ); |
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| 330 | #endif |
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| 331 | } |
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| 332 | } |
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| 333 | } |
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| 334 | |
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| 335 | // create a FBF inode in each cluster containing a FBF chdev |
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| 336 | for( channel = 0 ; channel < CONFIG_MAX_FBF_CHANNELS ; channel++ ) |
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| 337 | { |
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| 338 | chdev_xp = chdev_dir.fbf[channel]; |
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| 339 | if( chdev_xp != XPTR_NULL ) |
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| 340 | { |
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| 341 | chdev_cxy = GET_CXY( chdev_xp ); |
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| 342 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
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| 343 | if( chdev_cxy == local_cxy ) |
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| 344 | { |
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| 345 | vfs_add_child_in_parent( local_cxy, |
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| 346 | INODE_TYPE_DEV, |
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| 347 | FS_TYPE_DEVFS, |
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| 348 | devfs_external_inode_xp, |
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| 349 | chdev_ptr->name, |
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| 350 | GET_PTR( chdev_xp ), |
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| 351 | &inode_xp ); |
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| 352 | #if DEBUG_DEVFS_INIT |
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| 353 | cycle = (uint32_t)hal_get_cycles(); |
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| 354 | if( DEBUG_DEVFS_INIT < cycle ) |
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| 355 | printk("\n[DBG] %s : thread %x in process %x created <fbf[%d]> inode in cluster %x\n", |
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| 356 | __FUNCTION__, trdid, pid, channel, local_cxy, cycle ); |
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| 357 | #endif |
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| 358 | } |
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| 359 | } |
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| 360 | } |
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| 361 | |
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| 362 | // create a NIC_RX inode in each cluster containing a NIC_RX chdev |
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| 363 | for( channel = 0 ; channel < CONFIG_MAX_NIC_CHANNELS ; channel++ ) |
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| 364 | { |
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| 365 | chdev_xp = chdev_dir.nic_rx[channel]; |
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| 366 | if( chdev_xp != XPTR_NULL ) |
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| 367 | { |
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| 368 | chdev_cxy = GET_CXY( chdev_xp ); |
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| 369 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
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| 370 | if( chdev_cxy == local_cxy ) |
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| 371 | { |
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| 372 | vfs_add_child_in_parent( local_cxy, |
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| 373 | INODE_TYPE_DEV, |
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| 374 | FS_TYPE_DEVFS, |
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| 375 | devfs_external_inode_xp, |
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| 376 | chdev_ptr->name, |
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| 377 | GET_PTR( chdev_xp ), |
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| 378 | &inode_xp ); |
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| 379 | #if DEBUG_DEVFS_INIT |
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| 380 | cycle = (uint32_t)hal_get_cycles(); |
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| 381 | if( DEBUG_DEVFS_INIT < cycle ) |
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| 382 | printk("\n[DBG] %s : thread %x in process %x created <nic_rx[%d]> inode in cluster %x\n", |
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| 383 | __FUNCTION__, trdid, pid, channel, local_cxy, cycle ); |
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| 384 | #endif |
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| 385 | } |
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| 386 | } |
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| 387 | } |
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| 388 | |
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| 389 | // create a NIC_TX inode in each cluster containing a NIC_TX chdev |
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| 390 | for( channel = 0 ; channel < CONFIG_MAX_NIC_CHANNELS ; channel++ ) |
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| 391 | { |
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| 392 | chdev_xp = chdev_dir.nic_tx[channel]; |
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| 393 | if( chdev_xp != XPTR_NULL ) |
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| 394 | { |
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| 395 | chdev_cxy = GET_CXY( chdev_xp ); |
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| 396 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
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| 397 | if( chdev_cxy == local_cxy ) |
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| 398 | { |
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| 399 | vfs_add_child_in_parent( local_cxy, |
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| 400 | INODE_TYPE_DEV, |
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| 401 | FS_TYPE_DEVFS, |
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| 402 | devfs_external_inode_xp, |
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| 403 | chdev_ptr->name, |
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| 404 | GET_PTR( chdev_xp ), |
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| 405 | &inode_xp ); |
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| 406 | #if DEBUG_DEVFS_INIT |
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| 407 | cycle = (uint32_t)hal_get_cycles(); |
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| 408 | if( DEBUG_DEVFS_INIT < cycle ) |
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| 409 | printk("\n[DBG] %s : thread %x in process %x created <nic_tx[%d]> inode in cluster %x\n", |
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| 410 | __FUNCTION__, trdid, pid, channel, local_cxy, cycle ); |
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| 411 | #endif |
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| 412 | } |
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| 413 | } |
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| 414 | } |
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| 415 | } // end devfs_local_init() |
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| 416 | |
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| 417 | ////////////////////////////////////////// |
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| 418 | int devfs_user_move( bool_t to_buffer, |
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| 419 | xptr_t file_xp, |
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| 420 | void * u_buf, |
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| 421 | uint32_t size ) |
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| 422 | { |
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| 423 | assert( ( file_xp != XPTR_NULL ) , "file_xp == XPTR_NULL" ); |
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| 424 | |
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| 425 | assert( ( size < CONFIG_TXT_KBUF_SIZE ) , "string size too large" ); |
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| 426 | |
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| 427 | xptr_t chdev_xp; |
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| 428 | cxy_t chdev_cxy; |
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| 429 | chdev_t * chdev_ptr; // associated chdev type |
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| 430 | uint32_t func; // chdev functionnal type |
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| 431 | uint32_t channel; // chdev channel index |
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| 432 | error_t error; |
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| 433 | |
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| 434 | char k_buf[CONFIG_TXT_KBUF_SIZE]; // local kernel buffer |
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| 435 | |
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| 436 | #if (DEBUG_SYS_READ & 1) |
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| 437 | enter_devfs_read = hal_time_stamp(); |
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| 438 | #endif |
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| 439 | |
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| 440 | #if (DEBUG_SYS_WRITE & 1) |
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| 441 | enter_devfs_write = hal_time_stamp(); |
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| 442 | #endif |
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| 443 | |
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| 444 | #if DEBUG_DEVFS_MOVE |
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| 445 | uint32_t cycle = (uint32_t)hal_get_cycles(); |
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| 446 | if( DEBUG_DEVFS_MOVE < cycle ) |
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| 447 | printk("\n[DBG] %s : thread %x enter / to_mem %d / cycle %d\n", |
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| 448 | __FUNCTION__ , CURRENT_THREAD , to_buffer , cycle ); |
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| 449 | #endif |
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| 450 | |
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| 451 | // get extended pointer on chdev_xp |
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| 452 | chdev_xp = chdev_from_file( file_xp ); |
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| 453 | |
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| 454 | // get cluster and local pointer on chdev |
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| 455 | chdev_cxy = GET_CXY( chdev_xp ); |
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| 456 | chdev_ptr = (chdev_t *)GET_PTR( chdev_xp ); |
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| 457 | |
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| 458 | // get chdev functionnal type and channel |
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| 459 | func = hal_remote_l32( XPTR( chdev_cxy , &chdev_ptr->func ) ); |
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| 460 | channel = hal_remote_l32( XPTR( chdev_cxy , &chdev_ptr->channel ) ); |
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| 461 | |
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| 462 | // action depends on "func" and "to_buffer" |
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| 463 | if( func == DEV_FUNC_TXT ) |
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| 464 | { |
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| 465 | if( to_buffer ) // TXT read |
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| 466 | { |
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| 467 | uint32_t i; |
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| 468 | for( i = 0 ; i < size ; i++ ) |
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| 469 | { |
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| 470 | error = dev_txt_read( channel , &k_buf[i] ); |
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| 471 | |
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| 472 | if( error ) |
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| 473 | { |
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| 474 | return -1; |
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| 475 | } |
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| 476 | else |
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| 477 | { |
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| 478 | hal_strcpy_to_uspace( u_buf , k_buf , size ); |
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| 479 | } |
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| 480 | } |
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| 481 | |
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| 482 | #if DEBUG_DEVFS_MOVE |
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| 483 | cycle = (uint32_t)hal_get_cycles(); |
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| 484 | if( DEBUG_DEVFS_MOVE < cycle ) |
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| 485 | printk("\n[DBG] %s : thread %x exit / to_mem %d / cycle %d\n", |
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| 486 | __FUNCTION__ , CURRENT_THREAD , to_buffer / cycle ); |
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| 487 | #endif |
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| 488 | |
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| 489 | #if (DEBUG_SYS_READ & 1) |
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| 490 | exit_devfs_read = hal_time_stamp(); |
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| 491 | #endif |
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| 492 | return size; |
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| 493 | } |
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| 494 | else // TXT write |
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| 495 | { |
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| 496 | hal_strcpy_from_uspace( k_buf , u_buf , size ); |
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| 497 | |
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| 498 | error = dev_txt_write( channel , k_buf , size ); |
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| 499 | if( error ) |
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| 500 | { |
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| 501 | return -1; |
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| 502 | } |
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| 503 | else |
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| 504 | { |
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| 505 | |
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| 506 | #if DEBUG_DEVFS_MOVE |
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| 507 | cycle = (uint32_t)hal_get_cycles(); |
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| 508 | if( DEBUG_DEVFS_MOVE < cycle ) |
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| 509 | printk("\n[DBG] %s : thread %x exit / to_mem %d / cycle %d\n", |
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| 510 | __FUNCTION__ , CURRENT_THREAD , to_buffer / cycle ); |
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| 511 | #endif |
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| 512 | |
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| 513 | #if (DEBUG_SYS_WRITE & 1) |
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| 514 | exit_devfs_write = hal_time_stamp(); |
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| 515 | #endif |
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| 516 | return size; |
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| 517 | } |
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| 518 | } |
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| 519 | } |
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| 520 | else |
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| 521 | { |
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| 522 | assert( false , "%s does not support direct user access", |
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| 523 | chdev_func_str(func) ); |
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| 524 | |
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| 525 | return -1; |
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| 526 | } |
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| 527 | |
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| 528 | } // end devfs_user_move() |
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| 529 | |
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| 530 | |
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