[d964f79] | 1 | /** |
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[8695cae] | 2 | * @file |
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[067a96a] | 3 | * |
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[8695cae] | 4 | * @ingroup ClassicPartImpl |
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| 5 | * |
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| 6 | * @brief Classic Partition Manager Implementation |
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[067a96a] | 7 | */ |
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| 8 | |
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[f9293df] | 9 | /* COPYRIGHT (c) 1989-2008. |
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[ac7d5ef0] | 10 | * On-Line Applications Research Corporation (OAR). |
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| 11 | * |
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[98e4ebf5] | 12 | * The license and distribution terms for this file may be |
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| 13 | * found in the file LICENSE in this distribution or at |
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[c499856] | 14 | * http://www.rtems.org/license/LICENSE. |
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[ac7d5ef0] | 15 | */ |
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| 16 | |
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[8695cae] | 17 | #ifndef _RTEMS_RTEMS_PARTIMPL_H |
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| 18 | #define _RTEMS_RTEMS_PARTIMPL_H |
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| 19 | |
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| 20 | #include <rtems/rtems/part.h> |
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| 21 | #include <rtems/score/chainimpl.h> |
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[a2e3f33] | 22 | #include <rtems/score/objectimpl.h> |
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[8695cae] | 23 | |
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| 24 | #ifdef __cplusplus |
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| 25 | extern "C" { |
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[4d24fccb] | 26 | #endif |
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| 27 | |
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[8695cae] | 28 | /** |
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| 29 | * @defgroup ClassicPartImpl Classic Partition Manager Implementation |
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| 30 | * |
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| 31 | * @ingroup ClassicPart |
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| 32 | * |
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| 33 | * @{ |
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| 34 | */ |
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[ac7d5ef0] | 35 | |
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[8695cae] | 36 | /** |
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| 37 | * The following defines the information control block used to |
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| 38 | * manage this class of objects. |
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| 39 | */ |
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[fd3cc36f] | 40 | extern Objects_Information _Partition_Information; |
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[067a96a] | 41 | |
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| 42 | /** |
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[7ee5bc4c] | 43 | * @brief Allocate a buffer from the_partition. |
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[1a8fde6c] | 44 | * |
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| 45 | * This function attempts to allocate a buffer from the_partition. |
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| 46 | * If successful, it returns the address of the allocated buffer. |
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| 47 | * Otherwise, it returns NULL. |
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[ac7d5ef0] | 48 | */ |
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[503dc058] | 49 | RTEMS_INLINE_ROUTINE void *_Partition_Allocate_buffer ( |
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[ac7d5ef0] | 50 | Partition_Control *the_partition |
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| 51 | ) |
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| 52 | { |
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[3570ec6] | 53 | return _Chain_Get_unprotected( &the_partition->Memory ); |
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[ac7d5ef0] | 54 | } |
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| 55 | |
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[067a96a] | 56 | /** |
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[7ee5bc4c] | 57 | * @brief Frees the_buffer to the_partition. |
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[1a8fde6c] | 58 | * |
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| 59 | * This routine frees the_buffer to the_partition. |
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[ac7d5ef0] | 60 | */ |
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[503dc058] | 61 | RTEMS_INLINE_ROUTINE void _Partition_Free_buffer ( |
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[ac7d5ef0] | 62 | Partition_Control *the_partition, |
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| 63 | Chain_Node *the_buffer |
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| 64 | ) |
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| 65 | { |
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[3570ec6] | 66 | _Chain_Append_unprotected( &the_partition->Memory, the_buffer ); |
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[ac7d5ef0] | 67 | } |
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| 68 | |
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[067a96a] | 69 | /** |
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[7ee5bc4c] | 70 | * @brief Checks whether is on a valid buffer boundary for the_partition. |
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[1a8fde6c] | 71 | * |
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| 72 | * This function returns TRUE if the_buffer is on a valid buffer |
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| 73 | * boundary for the_partition, and FALSE otherwise. |
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[ac7d5ef0] | 74 | */ |
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[484a769] | 75 | RTEMS_INLINE_ROUTINE bool _Partition_Is_buffer_on_boundary ( |
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[ac7d5ef0] | 76 | void *the_buffer, |
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| 77 | Partition_Control *the_partition |
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| 78 | ) |
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| 79 | { |
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[b2de426] | 80 | intptr_t offset; |
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[ac7d5ef0] | 81 | |
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[b2de426] | 82 | offset = _Addresses_Subtract( |
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[ac7d5ef0] | 83 | the_buffer, |
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| 84 | the_partition->starting_address |
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| 85 | ); |
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| 86 | |
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| 87 | return ((offset % the_partition->buffer_size) == 0); |
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| 88 | } |
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| 89 | |
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[067a96a] | 90 | /** |
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[7ee5bc4c] | 91 | * @brief Checks whether the_buffer is a valid buffer from the_partition. |
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[1a8fde6c] | 92 | * |
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| 93 | * This function returns TRUE if the_buffer is a valid buffer from |
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| 94 | * the_partition, otherwise FALSE is returned. |
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[ac7d5ef0] | 95 | */ |
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[484a769] | 96 | RTEMS_INLINE_ROUTINE bool _Partition_Is_buffer_valid ( |
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[ac7d5ef0] | 97 | Chain_Node *the_buffer, |
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| 98 | Partition_Control *the_partition |
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| 99 | ) |
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| 100 | { |
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| 101 | void *starting; |
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| 102 | void *ending; |
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| 103 | |
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| 104 | starting = the_partition->starting_address; |
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| 105 | ending = _Addresses_Add_offset( starting, the_partition->length ); |
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| 106 | |
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| 107 | return ( |
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| 108 | _Addresses_Is_in_range( the_buffer, starting, ending ) && |
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| 109 | _Partition_Is_buffer_on_boundary( the_buffer, the_partition ) |
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| 110 | ); |
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| 111 | } |
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| 112 | |
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[27bbc05] | 113 | RTEMS_INLINE_ROUTINE bool _Partition_Is_buffer_size_aligned( |
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| 114 | uint32_t buffer_size |
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| 115 | ) |
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| 116 | { |
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| 117 | return (buffer_size % CPU_SIZEOF_POINTER) == 0; |
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| 118 | } |
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| 119 | |
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| 120 | RTEMS_INLINE_ROUTINE bool _Partition_Is_buffer_area_aligned( |
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| 121 | const void *starting_address |
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[ac7d5ef0] | 122 | ) |
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| 123 | { |
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[27bbc05] | 124 | return (((uintptr_t) starting_address) % CPU_SIZEOF_POINTER) == 0; |
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[ac7d5ef0] | 125 | } |
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| 126 | |
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[067a96a] | 127 | /** |
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[7ee5bc4c] | 128 | * @brief Allocates a partition control block from the |
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| 129 | * inactive chain of free partition control blocks. |
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[1a8fde6c] | 130 | * |
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| 131 | * This function allocates a partition control block from |
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| 132 | * the inactive chain of free partition control blocks. |
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[ac7d5ef0] | 133 | */ |
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[503dc058] | 134 | RTEMS_INLINE_ROUTINE Partition_Control *_Partition_Allocate ( void ) |
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[ac7d5ef0] | 135 | { |
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| 136 | return (Partition_Control *) _Objects_Allocate( &_Partition_Information ); |
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| 137 | } |
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| 138 | |
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[3570ec6] | 139 | RTEMS_INLINE_ROUTINE void _Partition_Initialize( |
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| 140 | Partition_Control *the_partition, |
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| 141 | void *starting_address, |
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| 142 | uint32_t length, |
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| 143 | uint32_t buffer_size, |
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| 144 | rtems_attribute attribute_set |
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| 145 | ) |
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| 146 | { |
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| 147 | the_partition->starting_address = starting_address; |
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| 148 | the_partition->length = length; |
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| 149 | the_partition->buffer_size = buffer_size; |
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| 150 | the_partition->attribute_set = attribute_set; |
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| 151 | the_partition->number_of_used_blocks = 0; |
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| 152 | |
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| 153 | _Chain_Initialize( |
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| 154 | &the_partition->Memory, |
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| 155 | starting_address, |
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| 156 | length / buffer_size, |
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| 157 | buffer_size |
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| 158 | ); |
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| 159 | |
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| 160 | _ISR_lock_Initialize( &the_partition->Lock, "Partition" ); |
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| 161 | } |
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| 162 | |
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| 163 | RTEMS_INLINE_ROUTINE void _Partition_Destroy( |
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| 164 | Partition_Control *the_partition |
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| 165 | ) |
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| 166 | { |
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| 167 | _ISR_lock_Destroy( &the_partition->Lock ); |
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| 168 | } |
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| 169 | |
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[067a96a] | 170 | /** |
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[7ee5bc4c] | 171 | * @brief Frees a partition control block to the |
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| 172 | * inactive chain of free partition control blocks. |
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[1a8fde6c] | 173 | * |
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| 174 | * This routine frees a partition control block to the |
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| 175 | * inactive chain of free partition control blocks. |
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[ac7d5ef0] | 176 | */ |
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[503dc058] | 177 | RTEMS_INLINE_ROUTINE void _Partition_Free ( |
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[ac7d5ef0] | 178 | Partition_Control *the_partition |
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| 179 | ) |
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| 180 | { |
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| 181 | _Objects_Free( &_Partition_Information, &the_partition->Object ); |
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| 182 | } |
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| 183 | |
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[0a00b2b] | 184 | RTEMS_INLINE_ROUTINE Partition_Control *_Partition_Get( |
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[ac7d5ef0] | 185 | Objects_Id id, |
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[3570ec6] | 186 | ISR_lock_Context *lock_context |
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| 187 | ) |
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| 188 | { |
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[582bb23c] | 189 | return (Partition_Control *) _Objects_Get( |
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[3570ec6] | 190 | id, |
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[0a00b2b] | 191 | lock_context, |
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| 192 | &_Partition_Information |
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[3570ec6] | 193 | ); |
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| 194 | } |
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| 195 | |
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| 196 | RTEMS_INLINE_ROUTINE void _Partition_Acquire_critical( |
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| 197 | Partition_Control *the_partition, |
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| 198 | ISR_lock_Context *lock_context |
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| 199 | ) |
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| 200 | { |
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| 201 | _ISR_lock_Acquire( &the_partition->Lock, lock_context ); |
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| 202 | } |
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| 203 | |
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| 204 | RTEMS_INLINE_ROUTINE void _Partition_Release( |
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| 205 | Partition_Control *the_partition, |
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| 206 | ISR_lock_Context *lock_context |
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[ac7d5ef0] | 207 | ) |
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| 208 | { |
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[3570ec6] | 209 | _ISR_lock_Release_and_ISR_enable( &the_partition->Lock, lock_context ); |
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[ac7d5ef0] | 210 | } |
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| 211 | |
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[067a96a] | 212 | /**@}*/ |
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| 213 | |
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[8695cae] | 214 | #ifdef __cplusplus |
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| 215 | } |
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| 216 | #endif |
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| 217 | |
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| 218 | #if defined(RTEMS_MULTIPROCESSING) |
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| 219 | #include <rtems/rtems/partmp.h> |
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| 220 | #endif |
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| 221 | |
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[ac7d5ef0] | 222 | #endif |
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| 223 | /* end of include file */ |
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