source: rtems/bsps/arm/lpc32xx/include/bsp/mmu.h @ 2afb22b

5
Last change on this file since 2afb22b was 2afb22b, checked in by Chris Johns <chrisj@…>, on 12/23/17 at 07:18:56

Remove make preinstall

A speciality of the RTEMS build system was the make preinstall step. It
copied header files from arbitrary locations into the build tree. The
header files were included via the -Bsome/build/tree/path GCC command
line option.

This has at least seven problems:

  • The make preinstall step itself needs time and disk space.
  • Errors in header files show up in the build tree copy. This makes it hard for editors to open the right file to fix the error.
  • There is no clear relationship between source and build tree header files. This makes an audit of the build process difficult.
  • The visibility of all header files in the build tree makes it difficult to enforce API barriers. For example it is discouraged to use BSP-specifics in the cpukit.
  • An introduction of a new build system is difficult.
  • Include paths specified by the -B option are system headers. This may suppress warnings.
  • The parallel build had sporadic failures on some hosts.

This patch removes the make preinstall step. All installed header
files are moved to dedicated include directories in the source tree.
Let @RTEMS_CPU@ be the target architecture, e.g. arm, powerpc, sparc,
etc. Let @RTEMS_BSP_FAMILIY@ be a BSP family base directory, e.g.
erc32, imx, qoriq, etc.

The new cpukit include directories are:

  • cpukit/include
  • cpukit/score/cpu/@RTEMS_CPU@/include
  • cpukit/libnetworking

The new BSP include directories are:

  • bsps/include
  • bsps/@RTEMS_CPU@/include
  • bsps/@RTEMS_CPU@/@RTEMS_BSP_FAMILIY@/include

There are build tree include directories for generated files.

The include directory order favours the most general header file, e.g.
it is not possible to override general header files via the include path
order.

The "bootstrap -p" option was removed. The new "bootstrap -H" option
should be used to regenerate the "headers.am" files.

Update #3254.
  • Property mode set to 100644
File size: 1.6 KB
Line 
1/**
2 * @file
3 *
4 * @ingroup lpc32xx_mmu
5 *
6 * @brief MMU support API.
7 */
8
9/*
10 * Copyright (c) 2009-2011 embedded brains GmbH.  All rights reserved.
11 *
12 *  embedded brains GmbH
13 *  Obere Lagerstr. 30
14 *  82178 Puchheim
15 *  Germany
16 *  <rtems@embedded-brains.de>
17 *
18 * The license and distribution terms for this file may be
19 * found in the file LICENSE in this distribution or at
20 * http://www.rtems.org/license/LICENSE.
21 */
22
23#ifndef LIBBSP_ARM_LPC32XX_MMU_H
24#define LIBBSP_ARM_LPC32XX_MMU_H
25
26#include <libcpu/arm-cp15.h>
27
28#ifdef __cplusplus
29extern "C" {
30#endif /* __cplusplus */
31
32/**
33 * @defgroup lpc32xx_mmu MMU Support
34 *
35 * @ingroup arm_lpc32xx
36 *
37 * @brief MMU support.
38 *
39 * @{
40 */
41
42#define LPC32XX_MMU_CLIENT_DOMAIN 15U
43
44#define LPC32XX_MMU_READ_ONLY \
45  ((LPC32XX_MMU_CLIENT_DOMAIN << ARM_MMU_SECT_DOMAIN_SHIFT) \
46    | ARM_MMU_SECT_DEFAULT)
47
48#define LPC32XX_MMU_READ_ONLY_CACHED \
49  (LPC32XX_MMU_READ_ONLY | ARM_MMU_SECT_C | ARM_MMU_SECT_B)
50
51#define LPC32XX_MMU_READ_WRITE \
52  ((LPC32XX_MMU_CLIENT_DOMAIN << ARM_MMU_SECT_DOMAIN_SHIFT) \
53    | ARM_MMU_SECT_AP_0 \
54    | ARM_MMU_SECT_DEFAULT)
55
56#define LPC32XX_MMU_READ_WRITE_CACHED \
57  (LPC32XX_MMU_READ_WRITE | ARM_MMU_SECT_C | ARM_MMU_SECT_B)
58
59/**
60 * @brief Sets the @a section_flags for the address range [@a begin, @a end).
61 *
62 * @return Previous section flags of the first modified entry.
63 */
64static inline uint32_t lpc32xx_set_translation_table_entries(
65  const void *begin,
66  const void *end,
67  uint32_t section_flags
68)
69{
70  return arm_cp15_set_translation_table_entries(begin, end, section_flags);
71}
72
73/** @} */
74
75#ifdef __cplusplus
76}
77#endif /* __cplusplus */
78
79#endif /* LIBBSP_ARM_LPC32XX_MMU_H */
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