source: rtems/bsps/arm/include/libcpu/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: 622 bytes
Line 
1/*
2 *  ARM MMU header file
3 */
4
5/*
6 *  Copyright (c) 2004 by Cogent Computer Systems
7 *  Written by Jay Monkman <jtm@lopingdog.com>
8 */
9
10#ifndef __LIBCPU_MMU_H__
11#define __LIBCPU_MMU_H__
12
13#include <stdint.h>
14
15#define MMU_SECT_SIZE         0x100000
16
17#define MMU_CACHE_NONE        0x0
18#define MMU_CACHE_BUFFERED    0x1
19#define MMU_CACHE_WTHROUGH    0x2
20#define MMU_CACHE_WBACK       0x3
21
22typedef struct {
23    uint32_t paddr;
24    uint32_t vaddr;
25    uint32_t size;         /* in MB */
26    uint8_t  cache_flags;
27} mmu_sect_map_t;
28
29void mmu_init(mmu_sect_map_t *map);
30void mmu_set_cpu_async_mode(void);
31
32#endif /* __MMU_H__ */
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