[ac7d5ef0] | 1 | /* |
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| 2 | * Partition Manager |
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| 3 | * |
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| 4 | * |
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| 5 | * COPYRIGHT (c) 1989, 1990, 1991, 1992, 1993, 1994. |
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| 6 | * On-Line Applications Research Corporation (OAR). |
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| 7 | * All rights assigned to U.S. Government, 1994. |
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| 8 | * |
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| 9 | * This material may be reproduced by or for the U.S. Government pursuant |
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| 10 | * to the copyright license under the clause at DFARS 252.227-7013. This |
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| 11 | * notice must appear in all copies of this file and its derivatives. |
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| 12 | * |
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| 13 | * $Id$ |
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| 14 | */ |
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| 15 | |
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| 16 | #include <rtems/system.h> |
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| 17 | #include <rtems/address.h> |
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| 18 | #include <rtems/config.h> |
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| 19 | #include <rtems/object.h> |
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| 20 | #include <rtems/part.h> |
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| 21 | #include <rtems/thread.h> |
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| 22 | |
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| 23 | /*PAGE |
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| 24 | * |
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| 25 | * _Partition_Manager_initialization |
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| 26 | * |
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| 27 | * This routine initializes all partition manager related |
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| 28 | * data structures. |
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| 29 | * |
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| 30 | * Input parameters: |
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| 31 | * maximum_partitions - number of partitions to initialize |
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| 32 | * |
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| 33 | * Output parameters: NONE |
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| 34 | */ |
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| 35 | |
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| 36 | void _Partition_Manager_initialization( |
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| 37 | unsigned32 maximum_partitions |
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| 38 | ) |
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| 39 | { |
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| 40 | _Objects_Initialize_information( |
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| 41 | &_Partition_Information, |
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[9863dbf] | 42 | OBJECTS_RTEMS_PARTITIONS, |
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[ac7d5ef0] | 43 | TRUE, |
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| 44 | maximum_partitions, |
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| 45 | sizeof( Partition_Control ) |
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| 46 | ); |
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| 47 | |
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| 48 | } |
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| 49 | |
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| 50 | /*PAGE |
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| 51 | * |
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| 52 | * rtems_partition_create |
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| 53 | * |
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| 54 | * This directive creates a partiton of fixed sized buffers from the |
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| 55 | * given contiguous memory area. |
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| 56 | * |
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| 57 | * Input parameters: |
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| 58 | * name - user defined partition name |
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| 59 | * starting_address - physical start address of partition |
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| 60 | * length - physical length in bytes |
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| 61 | * buffer_size - size of buffers in bytes |
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| 62 | * attribute_set - partition attributes |
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| 63 | * id - pointer to partition id |
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| 64 | * |
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| 65 | * Output parameters: |
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| 66 | * id - partition id |
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| 67 | * RTEMS_SUCCESSFUL - if successful |
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| 68 | * error code - if unsuccessful |
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| 69 | */ |
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| 70 | |
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| 71 | rtems_status_code rtems_partition_create( |
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| 72 | Objects_Name name, |
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| 73 | void *starting_address, |
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| 74 | unsigned32 length, |
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| 75 | unsigned32 buffer_size, |
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| 76 | rtems_attribute attribute_set, |
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| 77 | Objects_Id *id |
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| 78 | ) |
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| 79 | { |
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| 80 | register Partition_Control *the_partition; |
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| 81 | |
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| 82 | if ( !_Objects_Is_name_valid( name ) ) |
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| 83 | return ( RTEMS_INVALID_NAME ); |
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| 84 | |
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| 85 | if ( length == 0 || buffer_size == 0 || length < buffer_size || |
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| 86 | !_Partition_Is_buffer_size_aligned( buffer_size ) ) |
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| 87 | return ( RTEMS_INVALID_SIZE ); |
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| 88 | |
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| 89 | if ( !_Addresses_Is_aligned( starting_address ) ) |
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| 90 | return( RTEMS_INVALID_ADDRESS ); |
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| 91 | |
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| 92 | if ( _Attributes_Is_global( attribute_set ) && |
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| 93 | !_Configuration_Is_multiprocessing() ) |
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| 94 | return( RTEMS_MP_NOT_CONFIGURED ); |
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| 95 | |
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| 96 | _Thread_Disable_dispatch(); /* prevents deletion */ |
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| 97 | |
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| 98 | the_partition = _Partition_Allocate(); |
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| 99 | |
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| 100 | if ( !the_partition ) { |
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| 101 | _Thread_Enable_dispatch(); |
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| 102 | return( RTEMS_TOO_MANY ); |
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| 103 | } |
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| 104 | |
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| 105 | if ( _Attributes_Is_global( attribute_set ) && |
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| 106 | !( _Objects_MP_Open( &_Partition_Information, name, |
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| 107 | the_partition->Object.id, FALSE ) ) ) { |
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| 108 | _Partition_Free( the_partition ); |
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| 109 | _Thread_Enable_dispatch(); |
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| 110 | return( RTEMS_TOO_MANY ); |
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| 111 | } |
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| 112 | the_partition->starting_address = starting_address; |
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| 113 | the_partition->length = length; |
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| 114 | the_partition->buffer_size = buffer_size; |
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| 115 | the_partition->attribute_set = attribute_set; |
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| 116 | the_partition->number_of_used_blocks = 0; |
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| 117 | |
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| 118 | _Chain_Initialize( &the_partition->Memory, starting_address, |
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| 119 | length / buffer_size, buffer_size ); |
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| 120 | |
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| 121 | _Objects_Open( &_Partition_Information, &the_partition->Object, name ); |
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| 122 | |
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| 123 | *id = the_partition->Object.id; |
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| 124 | if ( _Attributes_Is_global( attribute_set ) ) |
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| 125 | _Partition_MP_Send_process_packet( |
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| 126 | PARTITION_MP_ANNOUNCE_CREATE, |
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| 127 | the_partition->Object.id, |
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| 128 | name, |
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| 129 | 0 /* Not used */ |
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| 130 | ); |
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| 131 | |
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| 132 | _Thread_Enable_dispatch(); |
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| 133 | return( RTEMS_SUCCESSFUL ); |
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| 134 | } |
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| 135 | |
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| 136 | /*PAGE |
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| 137 | * |
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| 138 | * rtems_partition_ident |
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| 139 | * |
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| 140 | * This directive returns the system ID associated with |
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| 141 | * the partition name. |
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| 142 | * |
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| 143 | * Input parameters: |
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| 144 | * name - user defined partition name |
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| 145 | * node - node(s) to be searched |
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| 146 | * id - pointer to partition id |
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| 147 | * |
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| 148 | * Output parameters: |
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| 149 | * *id - partition id |
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| 150 | * RTEMS_SUCCESSFUL - if successful |
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| 151 | * error code - if unsuccessful |
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| 152 | */ |
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| 153 | |
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| 154 | rtems_status_code rtems_partition_ident( |
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| 155 | Objects_Name name, |
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| 156 | unsigned32 node, |
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| 157 | Objects_Id *id |
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| 158 | ) |
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| 159 | { |
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| 160 | return( _Objects_Name_to_id( &_Partition_Information, name, node, id ) ); |
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| 161 | } |
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| 162 | |
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| 163 | /*PAGE |
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| 164 | * |
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| 165 | * rtems_partition_delete |
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| 166 | * |
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| 167 | * This directive allows a thread to delete a partition specified by |
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| 168 | * the partition identifier, provided that none of its buffers are |
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| 169 | * still allocated. |
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| 170 | * |
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| 171 | * Input parameters: |
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| 172 | * id - partition id |
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| 173 | * |
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| 174 | * Output parameters: |
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| 175 | * RTEMS_SUCCESSFUL - if successful |
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| 176 | * error code - if unsuccessful |
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| 177 | */ |
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| 178 | |
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| 179 | rtems_status_code rtems_partition_delete( |
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| 180 | Objects_Id id |
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| 181 | ) |
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| 182 | { |
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| 183 | register Partition_Control *the_partition; |
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| 184 | Objects_Locations location; |
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| 185 | |
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| 186 | the_partition = _Partition_Get( id, &location ); |
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| 187 | switch ( location ) { |
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| 188 | case OBJECTS_ERROR: |
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| 189 | return( RTEMS_INVALID_ID ); |
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| 190 | case OBJECTS_REMOTE: |
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| 191 | _Thread_Dispatch(); |
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| 192 | return( RTEMS_ILLEGAL_ON_REMOTE_OBJECT ); |
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| 193 | case OBJECTS_LOCAL: |
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| 194 | if ( the_partition->number_of_used_blocks == 0 ) { |
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| 195 | _Objects_Close( &_Partition_Information, &the_partition->Object ); |
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| 196 | _Partition_Free( the_partition ); |
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| 197 | if ( _Attributes_Is_global( the_partition->attribute_set ) ) { |
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| 198 | |
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| 199 | _Objects_MP_Close( |
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| 200 | &_Partition_Information, |
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| 201 | the_partition->Object.id |
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| 202 | ); |
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| 203 | |
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| 204 | _Partition_MP_Send_process_packet( |
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| 205 | PARTITION_MP_ANNOUNCE_DELETE, |
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| 206 | the_partition->Object.id, |
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| 207 | 0, /* Not used */ |
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| 208 | 0 /* Not used */ |
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| 209 | ); |
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| 210 | } |
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| 211 | |
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| 212 | _Thread_Enable_dispatch(); |
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| 213 | return( RTEMS_SUCCESSFUL ); |
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| 214 | } |
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| 215 | _Thread_Enable_dispatch(); |
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| 216 | return( RTEMS_RESOURCE_IN_USE ); |
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| 217 | } |
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| 218 | |
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| 219 | return( RTEMS_INTERNAL_ERROR ); /* unreached - only to remove warnings */ |
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| 220 | } |
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| 221 | |
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| 222 | /*PAGE |
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| 223 | * |
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| 224 | * rtems_partition_get_buffer |
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| 225 | * |
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| 226 | * This directive will obtain a buffer from a buffer partition. |
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| 227 | * |
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| 228 | * Input parameters: |
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| 229 | * id - partition id |
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| 230 | * buffer - pointer to buffer address |
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| 231 | * |
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| 232 | * Output parameters: |
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| 233 | * buffer - pointer to buffer address filled in |
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| 234 | * RTEMS_SUCCESSFUL - if successful |
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| 235 | * error code - if unsuccessful |
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| 236 | */ |
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| 237 | |
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| 238 | rtems_status_code rtems_partition_get_buffer( |
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| 239 | Objects_Id id, |
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| 240 | void **buffer |
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| 241 | ) |
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| 242 | { |
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| 243 | register Partition_Control *the_partition; |
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| 244 | Objects_Locations location; |
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| 245 | void *the_buffer; |
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| 246 | |
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| 247 | the_partition = _Partition_Get( id, &location ); |
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| 248 | switch ( location ) { |
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| 249 | case OBJECTS_ERROR: |
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| 250 | return( RTEMS_INVALID_ID ); |
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| 251 | case OBJECTS_REMOTE: |
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| 252 | _Thread_Executing->Wait.return_argument = buffer; |
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| 253 | return( |
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| 254 | _Partition_MP_Send_request_packet( |
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| 255 | PARTITION_MP_GET_BUFFER_REQUEST, |
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| 256 | id, |
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| 257 | 0 /* Not used */ |
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| 258 | ) |
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| 259 | ); |
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| 260 | case OBJECTS_LOCAL: |
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| 261 | the_buffer = _Partition_Allocate_buffer( the_partition ); |
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| 262 | if ( the_buffer ) { |
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| 263 | the_partition->number_of_used_blocks += 1; |
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| 264 | _Thread_Enable_dispatch(); |
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| 265 | *buffer = the_buffer; |
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| 266 | return( RTEMS_SUCCESSFUL ); |
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| 267 | } |
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| 268 | _Thread_Enable_dispatch(); |
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| 269 | return( RTEMS_UNSATISFIED ); |
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| 270 | } |
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| 271 | |
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| 272 | return( RTEMS_INTERNAL_ERROR ); /* unreached - only to remove warnings */ |
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| 273 | } |
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| 274 | |
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| 275 | /*PAGE |
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| 276 | * |
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| 277 | * rtems_partition_return_buffer |
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| 278 | * |
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| 279 | * This directive will return the given buffer to the specified |
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| 280 | * buffer partition. |
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| 281 | * |
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| 282 | * Input parameters: |
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| 283 | * id - partition id |
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| 284 | * buffer - pointer to buffer address |
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| 285 | * |
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| 286 | * Output parameters: |
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| 287 | * RTEMS_SUCCESSFUL - if successful |
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| 288 | * error code - if unsuccessful |
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| 289 | */ |
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| 290 | |
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| 291 | rtems_status_code rtems_partition_return_buffer( |
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| 292 | Objects_Id id, |
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| 293 | void *buffer |
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| 294 | ) |
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| 295 | { |
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| 296 | register Partition_Control *the_partition; |
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| 297 | Objects_Locations location; |
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| 298 | |
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| 299 | the_partition = _Partition_Get( id, &location ); |
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| 300 | switch ( location ) { |
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| 301 | case OBJECTS_ERROR: |
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| 302 | return( RTEMS_INVALID_ID ); |
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| 303 | case OBJECTS_REMOTE: |
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| 304 | return( |
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| 305 | _Partition_MP_Send_request_packet( |
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| 306 | PARTITION_MP_RETURN_BUFFER_REQUEST, |
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| 307 | id, |
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| 308 | buffer |
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| 309 | ) |
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| 310 | ); |
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| 311 | case OBJECTS_LOCAL: |
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| 312 | if ( _Partition_Is_buffer_valid( buffer, the_partition ) ) { |
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| 313 | _Partition_Free_buffer( the_partition, buffer ); |
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| 314 | the_partition->number_of_used_blocks -= 1; |
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| 315 | _Thread_Enable_dispatch(); |
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| 316 | return( RTEMS_SUCCESSFUL ); |
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| 317 | } |
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| 318 | _Thread_Enable_dispatch(); |
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| 319 | return( RTEMS_INVALID_ADDRESS ); |
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| 320 | } |
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| 321 | |
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| 322 | return( RTEMS_INTERNAL_ERROR ); /* unreached - only to remove warnings */ |
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| 323 | } |
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