source:
rtems/cpukit/rtems/src/dpmemexternal2internal.c
@
66cb142
Last change on this file since 66cb142 was 9c3bae11, checked in by Sebastian Huber <sebastian.huber@…>, on 04/21/16 at 05:52:19 | |
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File size: 1.2 KB |
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[205dbb9d] | 1 | /** |
2 | * @file | |
[1dc030f] | 3 | * |
[205dbb9d] | 4 | * @brief RTEMS Port External to Internal |
5 | * @ingroup ClassicDPMEM | |
6 | */ | |
7 | ||
8 | /* | |
[3a638ce] | 9 | * COPYRIGHT (c) 1989-2014. |
[1dc030f] | 10 | * On-Line Applications Research Corporation (OAR). |
11 | * | |
12 | * The license and distribution terms for this file may be | |
13 | * found in the file LICENSE in this distribution or at | |
[c499856] | 14 | * http://www.rtems.org/license/LICENSE. |
[1dc030f] | 15 | */ |
16 | ||
[1095ec1] | 17 | #if HAVE_CONFIG_H |
18 | #include "config.h" | |
19 | #endif | |
20 | ||
[562815c] | 21 | #include <rtems/rtems/dpmemimpl.h> |
[9c3bae11] | 22 | #include <rtems/score/address.h> |
[1dc030f] | 23 | |
24 | rtems_status_code rtems_port_external_to_internal( | |
[d3b72ca3] | 25 | rtems_id id, |
26 | void *external, | |
27 | void **internal | |
[1dc030f] | 28 | ) |
29 | { | |
[9c3bae11] | 30 | Dual_ported_memory_Control *the_port; |
31 | ISR_lock_Context lock_context; | |
32 | uint32_t ending; | |
[1dc030f] | 33 | |
[9c3bae11] | 34 | if ( internal == NULL ) { |
[e980b219] | 35 | return RTEMS_INVALID_ADDRESS; |
[9c3bae11] | 36 | } |
[e980b219] | 37 | |
[9c3bae11] | 38 | the_port = _Dual_ported_memory_Get( id, &lock_context ); |
39 | ||
40 | if ( the_port == NULL ) { | |
41 | return RTEMS_INVALID_ID; | |
42 | } | |
43 | ||
44 | ending = _Addresses_Subtract( external, the_port->external_base ); | |
45 | ||
46 | if ( ending > the_port->length ) { | |
47 | *internal = external; | |
48 | } else { | |
49 | *internal = _Addresses_Add_offset( the_port->internal_base, ending ); | |
[1dc030f] | 50 | } |
51 | ||
[9c3bae11] | 52 | _ISR_lock_ISR_enable( &lock_context ); |
53 | return RTEMS_SUCCESSFUL; | |
[1dc030f] | 54 | } |
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