source: rtems/bsps/lm32/include/bsp/milkymist_ac97.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 * @ingroup lm32_milkymist_ac97 lm32_milkymist_shared
4 * @brief Milkymist AC97 driver
5 */
6
7/*  milkymist_ac97.h
8 *
9 *  Milkymist AC97 driver for RTEMS
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 *  COPYRIGHT (c) 2010 Sebastien Bourdeauducq
16 */
17
18/**
19 * @defgroup lm32_milkymist_ac97 Milkymist AC97
20 * @ingroup lm32_milkymist_shared
21 * @brief Milkymist AC97 driver
22 * @{
23 */
24
25#ifndef __MILKYMIST_AC97_H_
26#define __MILKYMIST_AC97_H_
27
28#ifdef __cplusplus
29extern "C" {
30#endif
31
32/* Ioctls. 0x41 is 'A' */
33#define SOUND_MIXER_MIC             0x0
34#define SOUND_MIXER_LINE            0x1
35#define SOUND_MIXER_READ(x)         (0x4100+x)
36#define SOUND_MIXER_WRITE(x)        (0x4110+x)
37
38#define SOUND_SND_SUBMIT_PLAY       0x4120
39#define SOUND_SND_COLLECT_PLAY      0x4121
40#define SOUND_SND_SUBMIT_RECORD     0x4122
41#define SOUND_SND_COLLECT_RECORD    0x4123
42
43struct snd_buffer {
44  unsigned int nsamples;
45  void *user;
46  unsigned int samples[];
47};
48
49rtems_device_driver ac97_initialize(
50  rtems_device_major_number major,
51  rtems_device_minor_number minor,
52  void *arg
53);
54
55rtems_device_driver ac97_open(
56  rtems_device_major_number major,
57  rtems_device_minor_number minor,
58  void *arg
59);
60
61rtems_device_driver ac97_control(
62  rtems_device_major_number major,
63  rtems_device_minor_number minor,
64  void *arg
65);
66
67#define AC97_DRIVER_TABLE_ENTRY {ac97_initialize, \
68ac97_open, NULL, NULL, NULL, ac97_control}
69
70/** @} */
71
72#ifdef __cplusplus
73}
74#endif
75
76#endif /* __MILKYMIST_AC97_H_ */
Note: See TracBrowser for help on using the repository browser.