source: rtems/bsps/include/libchip/mc146818a.h @ 9964895

5
Last change on this file since 9964895 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: 2.0 KB
Line 
1/*
2 *  This file contains the definitions for the following real-time clocks:
3 *
4 *    + Motorola MC146818A
5 *
6 *  COPYRIGHT (c) 1989-1999.
7 *  On-Line Applications Research Corporation (OAR).
8 *
9 *  The license and distribution terms for this file may be
10 *  found in the file LICENSE in this distribution or at
11 *  http://www.rtems.org/license/LICENSE.
12 */
13
14#ifndef __LIBCHIP_MC146818A_h
15#define __LIBCHIP_MC146818A_h
16
17/*
18 *  Register addresses within chip
19 */
20#define MC146818A_SEC         0x00    /* seconds */
21#define MC146818A_SECALRM     0x01    /* seconds alarm */
22#define MC146818A_MIN         0x02    /* minutes */
23#define MC146818A_MINALRM     0x03    /* minutes alarm */
24#define MC146818A_HRS         0x04    /* hours */
25#define MC146818A_HRSALRM     0x05    /* hours alarm */
26#define MC146818A_WDAY        0x06    /* week day */
27#define MC146818A_DAY         0x07    /* day of month */
28#define MC146818A_MONTH       0x08    /* month of year */
29#define MC146818A_YEAR        0x09    /* month of year */
30
31#define MC146818A_STATUSA     0x0a    /* status register A */
32#define  MC146818ASA_TUP       0x80   /* time update in progress */
33#define  MC146818ASA_DIVIDER   0x20   /* divider for 32768 crystal */
34#define  MC146818ASA_1024      0x06   /* divide to 1024 Hz */
35
36#define MC146818A_STATUSB     0x0b    /* status register B */
37#define  MC146818ASB_DST       0x01   /* Daylight Savings Time */
38#define  MC146818ASB_24HR      0x02   /* 0 = 12 hours, 1 = 24 hours */
39#define  MC146818ASB_HALT      0x80   /* stop clock updates */
40
41#define MC146818A_STATUSD     0x0d    /* status register D */
42#define  MC146818ASD_PWR       0x80   /* clock lost power */
43
44
45/*
46 *  Driver function table
47 */
48extern rtc_fns mc146818a_fns;
49bool mc146818a_probe(
50  int minor
51);
52
53/*
54 * Default register access routines
55 */
56uint32_t mc146818a_get_register(
57  uintptr_t  ulCtrlPort,
58  uint8_t    ucRegNum
59);
60
61void  mc146818a_set_register(
62  uintptr_t  ulCtrlPort,
63  uint8_t    ucRegNum,
64  uint32_t   ucData
65);
66
67#endif
68/* end of include file */
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