source: rtems/bsps/i386/include/i386_io.h @ be3d7d75

5
Last change on this file since be3d7d75 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: 1.7 KB
Line 
1/**
2 * @file
3 * @ingroup i386_io
4 * @brief I/O
5 */
6
7/*
8 * Copyright (c) 2000 - Rosimildo da Silva.  All Rights Reserved.
9 *
10 * MODULE DESCRIPTION:
11 *
12 * IO Functions for the PC platform equivalent to DOS/Linux. They make
13 * eaiser the porting of code from these platforms.
14 *
15 *  by: Rosimildo da Silva:  rdasilva@connecttel.com
16 *
17 */
18
19/**
20 * @defgroup i386_io I/O
21 * @ingroup i386_comm
22 * @brief I/O
23 * @{
24 */
25
26#ifndef i386_io_h__
27#define i386_io_h__
28
29#define rtems_inb(port)                                                 \
30({                                                                      \
31        register int _inb_result;                                       \
32                                                        \
33        __asm__ volatile ("xorl %%eax,%%eax; inb %%dx,%%al" :           \
34            "=a" (_inb_result) : "d" (port));                           \
35        _inb_result;                                                    \
36})
37
38#define rtems_inw(port)                                                 \
39({                                                                      \
40        register int _inbw_result;                                      \
41                                                                        \
42        __asm__ volatile ("xorl %%eax,%%eax; inw %%dx,%%ax" :           \
43            "=a" (_inbw_result) : "d" (port));                          \
44        _inbw_result;                                                   \
45})
46
47#define rtems_outb(port, data)                                          \
48        __asm__ volatile ("outb %%al,%%dx" : : "a" (data), "d" (port))
49
50#define rtems_outw(port, data)                                          \
51        __asm__ volatile ("outw %%ax,%%dx" : : "a" (data), "d" (port))
52
53#define outp(port, val) rtems_outb(port,val)
54#define inp(port)             rtems_inb(port)
55
56#define outb(val, port) rtems_outb(port,val)
57#define inb(port)             rtems_inb(port)
58
59#define outb_p(val, port)       rtems_outb(port,val)
60#define inb_p(port)           rtems_inb(port)
61
62#define outportb(port,val)      rtems_outb(port,val)
63#define inportb(port)   rtems_inb(port)
64
65#define outw(val, port) rtems_outw(port,val)
66#define inw(port)             rtems_inw(port)
67
68#define cli()   __asm__ __volatile__("cli")
69#define sti()   __asm__ __volatile__("sti");
70
71#endif /* i386_io_h__ */
72
73/** @} */
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