source: rtems/bsps/i386/include/libcpu/page.h @ 7632906

5
Last change on this file since 7632906 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: 1.1 KB
Line 
1/*
2 * @file page.h
3 *
4 * Copyright (C) 1998  Eric Valette (valette@crf.canon.fr)
5 *                     Canon Centre Recherche France.
6 *
7 *  The license and distribution terms for this file may be
8 *  found in the file LICENSE in this distribution or at
9 *  http://www.rtems.org/license/LICENSE.
10 */
11
12#ifndef _LIBCPU_i386_PAGE_H
13#define _LIBCPU_i386_PAGE_H
14
15#ifndef ASM
16
17#include <rtems/score/cpu.h>
18
19/* C declaration for paging management */
20
21extern int      _CPU_is_cache_enabled(void);
22extern int      _CPU_is_paging_enabled(void);
23extern int      init_paging(void);
24extern void     _CPU_enable_paging(void);
25extern void     _CPU_disable_paging(void);
26extern void     _CPU_disable_cache(void);
27extern void     _CPU_enable_cache(void);
28extern int      _CPU_map_phys_address
29                      (void **mappedAddress, void *physAddress,
30                       int size, int flag);
31extern int      _CPU_unmap_virt_address (void *mappedAddress, int size);
32extern int      _CPU_change_memory_mapping_attribute
33                         (void **newAddress, void *mappedAddress,
34                          unsigned int size, unsigned int flag);
35extern int      _CPU_display_memory_attribute(void);
36
37# endif /* ASM */
38
39#endif
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