source: rtems/cpukit/score/cpu/sh/include/rtems/score/sh_io.h @ 2afb22b

5
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 * @file
3 *
4 * @brief Macros to Access Memory Mapped Devices on the SH7000-Architecture
5 *
6 * These are some macros to access memory mapped devices
7 * on the SH7000-architecture.
8 */
9
10/*
11 * Inspired from the linux kernel's include/asm/io.h
12 *
13 *  Authors: Ralf Corsepius (corsepiu@faw.uni-ulm.de) and
14 *           Bernd Becker (becker@faw.uni-ulm.de)
15 *
16 *  COPYRIGHT (c) 1996-1998, FAW Ulm, Germany
17 *
18 *  This program is distributed in the hope that it will be useful,
19 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
20 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
21 *
22 *
23 *  COPYRIGHT (c) 1998-2001.
24 *  On-Line Applications Research Corporation (OAR).
25 *
26 *  The license and distribution terms for this file may be
27 *  found in the file LICENSE in this distribution or at
28 *  http://www.rtems.org/license/LICENSE.
29 */
30
31#ifndef _RTEMS_SCORE_SH_IO_H
32#define _RTEMS_SCORE_SH_IO_H
33
34#define readb(addr)     (*(volatile unsigned char *) (addr))
35#define readw(addr)     (*(volatile unsigned short *) (addr))
36#define readl(addr)     (*(volatile unsigned int *) (addr))
37#define read8(addr)     (*(volatile uint8_t   *) (addr))
38#define read16(addr)    (*(volatile uint16_t   *) (addr))
39#define read32(addr)    (*(volatile uint32_t   *) (addr))
40
41#define writeb(b,addr)  ((*(volatile unsigned char *) (addr)) = (b))
42#define writew(b,addr)  ((*(volatile unsigned short *) (addr)) = (b))
43#define writel(b,addr)  ((*(volatile unsigned int *) (addr)) = (b))
44#define write8(b,addr)  ((*(volatile uint8_t    *) (addr)) = (b))
45#define write16(b,addr) ((*(volatile uint16_t   *) (addr)) = (b))
46#define write32(b,addr) ((*(volatile uint32_t   *) (addr)) = (b))
47
48#define inb(addr)       readb(addr)
49#define outb(b,addr)    writeb(b,addr)
50
51#endif
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