source: rtems/c/src/lib/libbsp/arm/altera-cyclone-v/startup/nocache-heap.c @ f73cfe99

4.115
Last change on this file since f73cfe99 was f73cfe99, checked in by Ralf Kirchner <ralf.kirchner@…>, on Jul 31, 2013 at 7:45:59 AM

bsp/altera-cyclone-v: New BSP

Implemented so far:

  • nocache heap for uncached RAM
  • basic timer
  • level 1 cache handling for arm cache controller in arm-cache-l1.h
  • level 2 L2C-310 cache controller
  • MMU
  • DWMAC 1000 ethernet controller
  • basic errata handling
  • smp startup for second core
  • Property mode set to 100644
File size: 1.9 KB
Line 
1/**
2 * @file
3 *
4 * @brief Heap handling for uncached RAM
5 */
6
7/*
8 * Copyright (c) 2013 embedded brains GmbH.  All rights reserved.
9 *
10 *  embedded brains GmbH
11 *  Dornierstr. 4
12 *  82178 Puchheim
13 *  Germany
14 *  <rtems@embedded-brains.de>
15 *
16 * The license and distribution terms for this file may be
17 * found in the file LICENSE in this distribution or at
18 * http://www.rtems.org/license/LICENSE.
19 */
20
21#include <assert.h>
22#include <bsp/linker-symbols.h>
23#include <bsp/nocache-heap.h>
24#include <rtems/score/heapimpl.h>
25#include <rtems/score/apimutex.h>
26
27/** @brief Uncached RAM pool
28 *
29 * Allocate the whole bsp_nocache for the nocache heap */
30static char nocache_pool[1024
31                         * 1024] __attribute__( ( section( ".bsp_nocache" ) ) );
32
33/** @brief Nocache heap
34 *
35 * Heap control for the uncached RAM heap */
36static Heap_Control nocache_heap;
37
38/** @brief Init nocache heap
39 *
40 * Constructor for the uncached RAM heap
41 * @returns 0 on succuss, error code from errno.h on failure
42 */
43void altera_cyclone_v_nocache_init_heap( void )
44{
45  uintptr_t heap_status = 0;
46
47  heap_status = _Heap_Initialize(
48    &nocache_heap,
49    &nocache_pool[0],
50    sizeof( nocache_pool ),
51    0
52    );
53  assert( heap_status != 0 );
54}
55
56/** @brief Allocate uncached RAM
57 *
58 * Allocates RAM from the uncached heap
59 * @param size  Number of bytes to be allocated
60 * @returns  Pointer to the allocated RAM
61 */
62void *altera_cyclone_v_nocache_malloc( const size_t size )
63{
64  void* ret = NULL;
65
66  _RTEMS_Lock_allocator();
67  ret = _Heap_Allocate( &nocache_heap, size );
68  _RTEMS_Unlock_allocator();
69
70  return ret;
71}
72
73/** @brief Free uncached RAM
74 *
75 * Releases RAM from the uncached heap
76 * @param ptr Address of the RAM to be released
77 */
78void altera_cyclone_v_nocache_free( void *ptr )
79{
80  if ( ptr != NULL ) {
81    bool ok;
82
83    _RTEMS_Lock_allocator();
84    ok = _Heap_Free( &nocache_heap, ptr );
85    _RTEMS_Unlock_allocator();
86
87    assert( ok );
88  }
89}
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