source: rtems/bsps/powerpc/mvme5500/include/bsp/bspException.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: 3.6 KB
Line 
1#ifndef BSP_EXCEPTION_HANDLER_H
2#define BSP_EXCEPTION_HANDLER_H
3
4/* A slightly improved exception 'default' exception handler for RTEMS / SVGM */
5
6/*
7 * Authorship
8 * ----------
9 * This software was created by
10 *     Till Straumann <strauman@slac.stanford.edu>, 5/2002,
11 *         Stanford Linear Accelerator Center, Stanford University.
12 *
13 * Acknowledgement of sponsorship
14 * ------------------------------
15 * This software was produced by
16 *     the Stanford Linear Accelerator Center, Stanford University,
17 *         under Contract DE-AC03-76SFO0515 with the Department of Energy.
18 *
19 * Government disclaimer of liability
20 * ----------------------------------
21 * Neither the United States nor the United States Department of Energy,
22 * nor any of their employees, makes any warranty, express or implied, or
23 * assumes any legal liability or responsibility for the accuracy,
24 * completeness, or usefulness of any data, apparatus, product, or process
25 * disclosed, or represents that its use would not infringe privately owned
26 * rights.
27 *
28 * Stanford disclaimer of liability
29 * --------------------------------
30 * Stanford University makes no representations or warranties, express or
31 * implied, nor assumes any liability for the use of this software.
32 *
33 * Stanford disclaimer of copyright
34 * --------------------------------
35 * Stanford University, owner of the copyright, hereby disclaims its
36 * copyright and all other rights in this software.  Hence, anyone may
37 * freely use it for any purpose without restriction.
38 *
39 * Maintenance of notices
40 * ----------------------
41 * In the interest of clarity regarding the origin and status of this
42 * SLAC software, this and all the preceding Stanford University notices
43 * are to remain affixed to any copy or derivative of this software made
44 * or distributed by the recipient and are to be affixed to any copy of
45 * software made or distributed by the recipient that contains a copy or
46 * derivative of this software.
47 *
48 * ------------------ SLAC Software Notices, Set 4 OTT.002a, 2004 FEB 03
49 */
50
51#include <bsp/vectors.h>
52
53/* Two types of exception intercepting / catching is supported:
54 *
55 *  - lowlevel handling (runs at IRQ level, before restoring any
56 *    task context).
57 *  - highlevel handling.
58 *
59 *  A lowlevel user hook is invoked twice, before and after processing
60 *  (printing) the exception.
61 *  If the user hook returns a nonzero value, normal processing
62 *  is skipped (including the second call to the hook)
63 *
64 *  If the hook returns nonzero to the second call, no default
65 *  'panic' occurs.
66 *
67 *  Default 'panic':
68 *   - if a task context is available:
69 *     - if a highlevel handler is installed, pass control
70 *       to the highlevel handler when returning from the
71 *       exception (the highlevel handler should probably
72 *       do a longjmp()). Otherwise:
73 *         - try to suspend interrupted task.
74 *   - hang if no task context is available.
75 *
76 */
77
78typedef struct BSP_ExceptionExtensionRec_ *BSP_ExceptionExtension;
79
80typedef int (*BSP_ExceptionHookProc)(BSP_Exception_frame *frame, BSP_ExceptionExtension ext, int after);
81
82typedef struct BSP_ExceptionExtensionRec_ {
83        BSP_ExceptionHookProc   lowlevelHook;
84        int                                             quiet;                  /* silence the exception handler */
85        void                                    (*highlevelHook)(BSP_ExceptionExtension);
86        /* user fields may be added after this */
87} BSP_ExceptionExtensionRec;
88
89#define SRR1_TEA_EXC    (1<<(31-13))
90#define SRR1_MCP_EXC    (1<<(31-12))
91
92void
93BSP_exceptionHandler(BSP_Exception_frame* excPtr);
94
95/* install an exception handler to the current task context */
96BSP_ExceptionExtension
97BSP_exceptionHandlerInstall(BSP_ExceptionExtension e);
98
99#endif
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