source: rtems/bsps/arm/gumstix/include/ffuart.h @ a3fe23c

5
Last change on this file since a3fe23c 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: 1.1 KB
Line 
1/*
2 *  FFUART for PXA250 CPU by Yang Xi<hiyangxi@gmail.com>
3 *
4 *  The license and distribution terms for this file may be
5 *  found in the file LICENSE in this distribution or at
6 *  http://www.rtems.org/license/LICENSE.
7 */
8
9#ifndef __FFUART_H__
10#define __FFUART_H__
11
12typedef struct {
13  /*
14   *Receive buffer(DLAB=0).Transmit buffer(DLAB=0).
15   *Divisor Latch Low(DLAB=1)
16   */
17  volatile unsigned int rbr;
18  /*Interrupt enable(DLAB=0). Divisor Latch High(DLAB=1)*/
19  volatile unsigned int ier;
20  /*Interrupt identification.FIFO control*/
21  volatile unsigned int iir;
22  /*Line Control*/
23  volatile unsigned int lcr;
24  /*Modem control*/
25  volatile unsigned int mcr;
26  /*Line Status*/
27  volatile unsigned int lsr;
28  /*Modem status*/
29  volatile unsigned int msr;
30  /*Scratch Pad*/
31  volatile unsigned int spr;
32  /*Infrared Selection*/
33  volatile unsigned int isr;
34} ffuart_reg_t;
35
36
37#define EIGHT_BITS_NOPARITY_1STOPBIT  0x3
38#define DLAB 0x80
39
40
41/*Divisor = frequency_uart/(16 * BaudRate*)*/
42#define FREQUENCY_UART (14745600)
43
44#define SEND_EMPTY 0x20
45#define FULL_RECEIVE 0x01
46
47#endif
48
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