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#ifndef BSP_EXCEPTION_HANDLER_H
#define BSP_EXCEPTION_HANDLER_H
/* $Id$ */
/* A slightly improved exception 'default' exception handler for RTEMS / SVGM */
/*
* Authorship
* ----------
* This software was created by
* Till Straumann <strauman@slac.stanford.edu>, 5/2002,
* Stanford Linear Accelerator Center, Stanford University.
*
* Acknowledgement of sponsorship
* ------------------------------
* This software was produced by
* the Stanford Linear Accelerator Center, Stanford University,
* under Contract DE-AC03-76SFO0515 with the Department of Energy.
*
* Government disclaimer of liability
* ----------------------------------
* Neither the United States nor the United States Department of Energy,
* nor any of their employees, makes any warranty, express or implied, or
* assumes any legal liability or responsibility for the accuracy,
* completeness, or usefulness of any data, apparatus, product, or process
* disclosed, or represents that its use would not infringe privately owned
* rights.
*
* Stanford disclaimer of liability
* --------------------------------
* Stanford University makes no representations or warranties, express or
* implied, nor assumes any liability for the use of this software.
*
* Stanford disclaimer of copyright
* --------------------------------
* Stanford University, owner of the copyright, hereby disclaims its
* copyright and all other rights in this software. Hence, anyone may
* freely use it for any purpose without restriction.
*
* Maintenance of notices
* ----------------------
* In the interest of clarity regarding the origin and status of this
* SLAC software, this and all the preceding Stanford University notices
* are to remain affixed to any copy or derivative of this software made
* or distributed by the recipient and are to be affixed to any copy of
* software made or distributed by the recipient that contains a copy or
* derivative of this software.
*
* ------------------ SLAC Software Notices, Set 4 OTT.002a, 2004 FEB 03
*/
#include <bsp/vectors.h>
/* Two types of exception intercepting / catching is supported:
*
* - lowlevel handling (runs at IRQ level, before restoring any
* task context).
* - highlevel handling.
*
* A lowlevel user hook is invoked twice, before and after processing
* (printing) the exception.
* If the user hook returns a nonzero value, normal processing
* is skipped (including the second call to the hook)
*
* If the hook returns nonzero to the second call, no default
* 'panic' occurs.
*
* Default 'panic':
* - if a task context is available:
* - if a highlevel handler is installed, pass control
* to the highlevel handler when returning from the
* exception (the highlevel handler should probably
* do a longjmp()). Otherwise:
* - try to suspend interrupted task.
* - hang if no task context is available.
*
*/
typedef struct BSP_ExceptionExtensionRec_ *BSP_ExceptionExtension;
typedef int (*BSP_ExceptionHookProc)(BSP_Exception_frame *frame, BSP_ExceptionExtension ext, int after);
typedef struct BSP_ExceptionExtensionRec_ {
BSP_ExceptionHookProc lowlevelHook;
int quiet; /* silence the exception handler */
void (*highlevelHook)(BSP_ExceptionExtension);
/* user fields may be added after this */
} BSP_ExceptionExtensionRec;
#define SRR1_TEA_EXC (1<<(31-13))
#define SRR1_MCP_EXC (1<<(31-12))
void
BSP_exceptionHandler(BSP_Exception_frame* excPtr);
/* install an exception handler to the current task context */
BSP_ExceptionExtension
BSP_exceptionHandlerInstall(BSP_ExceptionExtension e);
#endif
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