source: rtems/cpukit/score/cpu/m68k/include/rtems/asm.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: 3.3 KB
Line 
1/**
2 * @file
3 *
4 * @brief Address the Problems Caused by Incompatible Flavor of
5 * Assemblers and Toolsets
6 *
7 * This include file attempts to address the problems
8 * caused by incompatible flavors of assemblers and
9 * toolsets.  It primarily addresses variations in the
10 * use of leading underscores on symbols and the requirement
11 * that register names be preceded by a %.
12 *
13 * NOTE: The spacing in the use of these macros
14 *       is critical to them working as advertised.
15 */
16
17/*
18 *  COPYRIGHT:
19 *
20 *  This file is based on similar code found in newlib available
21 *  from ftp.cygnus.com.  The file which was used had no copyright
22 *  notice.  This file is freely distributable as long as the source
23 *  of the file is noted.  This file is:
24 *
25 *  COPYRIGHT (c) 1994-1997.
26 *  On-Line Applications Research Corporation (OAR).
27 */
28
29#ifndef _RTEMS_ASM_H
30#define _RTEMS_ASM_H
31
32/*
33 *  Indicate we are in an assembly file and get the basic CPU definitions.
34 */
35
36#ifndef ASM
37#define ASM
38#endif
39#include <rtems/score/cpuopts.h>
40#include <rtems/score/cpu.h>
41
42/*
43 *  Recent versions of GNU cpp define variables which indicate the
44 *  need for underscores and percents.  If not using GNU cpp or
45 *  the version does not support this, then you will obviously
46 *  have to define these as appropriate.
47 */
48
49#ifndef __USER_LABEL_PREFIX__
50#define __USER_LABEL_PREFIX__ _
51#endif
52
53#ifndef __REGISTER_PREFIX__
54#define __REGISTER_PREFIX__
55#endif
56
57#include <rtems/concat.h>
58
59/* Use the right prefix for global labels.  */
60
61#define SYM(x) CONCAT0 (__USER_LABEL_PREFIX__, x)
62
63/* Use the right prefix for registers.  */
64
65#define REG(x) CONCAT0 (__REGISTER_PREFIX__, x)
66
67#define d0 REG (d0)
68#define d1 REG (d1)
69#define d2 REG (d2)
70#define d3 REG (d3)
71#define d4 REG (d4)
72#define d5 REG (d5)
73#define d6 REG (d6)
74#define d7 REG (d7)
75#define a0 REG (a0)
76#define a1 REG (a1)
77#define a2 REG (a2)
78#define a3 REG (a3)
79#define a4 REG (a4)
80#define a5 REG (a5)
81#define a6 REG (a6)
82#define a7 REG (a7)
83#define sp REG (sp)
84
85#define msp REG (msp)
86#define usp REG (usp)
87#define isp REG (isp)
88#define sr  REG (sr)
89#define vbr REG (vbr)
90#define dfc REG (dfc)
91#define sfc REG (sfc)
92
93/* mcf52xx special regs */
94#define cacr    REG (cacr)
95#define acr0    REG (acr0)
96#define acr1    REG (acr1)
97#define rambar0 REG (rambar0)
98#define mbar    REG (mbar)
99
100/* additional v4e special regs */
101#define rambar1   REG (rambar1)
102#define macsr     REG (macsr)
103#define acc0      REG (acc0)
104#define acc1      REG (acc1)
105#define acc2      REG (acc2)
106#define acc3      REG (acc3)
107#define accext01  REG (accext01)
108#define accext23  REG (accext23)
109#define mask      REG (mask)
110
111
112#define fp0 REG (fp0)
113#define fp1 REG (fp1)
114#define fp2 REG (fp2)
115#define fp3 REG (fp3)
116#define fp4 REG (fp4)
117#define fp5 REG (fp5)
118#define fp6 REG (fp6)
119#define fp7 REG (fp7)
120
121#define fpc REG (fpc)
122#define fpi REG (fpi)
123#define fps REG (fps)
124#define fpsr REG (fpsr)
125
126
127/*
128 *  Define macros to handle section beginning and ends.
129 */
130
131
132#define BEGIN_CODE_DCL .text
133#define END_CODE_DCL
134#define BEGIN_DATA_DCL .data
135#define END_DATA_DCL
136#define BEGIN_CODE .text
137#define END_CODE
138#define BEGIN_DATA .data
139#define END_DATA
140#define BEGIN_BSS .bss
141#define END_BSS
142#define END
143
144/*
145 *  Following must be tailor for a particular flavor of the C compiler.
146 *  They may need to put underscores in front of the symbols.
147 */
148
149#define PUBLIC(sym) .globl SYM (sym)
150#define EXTERN(sym) .globl SYM (sym)
151
152#endif
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