source: rtems/bsps/powerpc/include/libcpu/page.h @ 2afb22b

Last change on this file since 2afb22b was 2afb22b, checked in by Chris Johns <chrisj@…>, on Dec 23, 2017 at 7:18:56 AM

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: 1.7 KB
Line 
1/*
2 * page.h
3 *
4 *      PowerPC memory management structures
5 *
6 * It is a stripped down version of linux ppc file...
7 *
8 * Copyright (C) 1999  Eric Valette (valette@crf.canon.fr)
9 *                     Canon Centre Recherche France.
10 *
11 *  The license and distribution terms for this file may be
12 *  found in the file LICENSE in this distribution or at
13 *  http://www.rtems.org/license/LICENSE.
14 */
15
16#ifndef _LIBCPU_PAGE_H
17#define _LIBCPU_PAGE_H
18
19/* PAGE_SHIFT determines the page size */
20#define PAGE_SHIFT      12
21#define PAGE_SIZE       (1UL << PAGE_SHIFT)
22#define PAGE_MASK       (~(PAGE_SIZE-1))
23
24#define PAGE_OFFSET     0xc0000000
25
26
27#ifndef ASM
28/*
29 * .. while these make it easier on the compiler
30 */
31typedef unsigned long pte_t;
32typedef unsigned long pmd_t;
33typedef unsigned long pgd_t;
34typedef unsigned long pgprot_t;
35
36#define pte_val(x)      (x)
37#define pmd_val(x)      (x)
38#define pgd_val(x)      (x)
39#define pgprot_val(x)   (x)
40
41#define __pte(x)        (x)
42#define __pmd(x)        (x)
43#define __pgd(x)        (x)
44#define __pgprot(x)     (x)
45
46
47/* align addr on a size boundry - adjust address up if needed -- Cort */
48#define _ALIGN(addr,size)       (((addr)+size-1)&(~(size-1)))
49
50/* to align the pointer to the (next) page boundary */
51#define PAGE_ALIGN(addr)        (((addr)+PAGE_SIZE-1)&PAGE_MASK)
52
53
54#define clear_page(page)        memset((void *)(page), 0, PAGE_SIZE)
55#define copy_page(to,from)      memcpy((void *)(to), (void *)(from), PAGE_SIZE)
56/* map phys->virtual and virtual->phys for RAM pages */
57
58#define __pa(x)                 ((unsigned long)(x)-PAGE_OFFSET)
59#define __va(x)                 ((void *)((unsigned long)(x)+PAGE_OFFSET))
60
61#define MAP_NR(addr)            (((unsigned long)addr-PAGE_OFFSET) >> PAGE_SHIFT)
62#define MAP_PAGE_RESERVED       (1<<15)
63
64extern unsigned long get_zero_page_fast(void);
65#endif /* ASM */
66#endif /* _LIBCPU_PAGE_H */
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