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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libcpu/] [m68k/] [m68040/] [fpsp/] [rtems_fpsp.c] - Rev 30
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/* * $Id: rtems_fpsp.c,v 1.2 2001-09-27 12:01:22 chris Exp $ */ #include <rtems/system.h> /* #include <rtems/score/isr.h> */ /* * User exception handlers */ proc_ptr M68040FPSPUserExceptionHandlers[9]; /* * Intercept requests to install an exception handler. * FPSP exceptions get special treatment. */ static int FPSP_install_raw_handler (unsigned32 vector, proc_ptr new_handler, proc_ptr *old_handler) { int fpspVector; switch (vector) { default: return 0; /* Non-FPSP vector */ case 11: fpspVector = 0; break; /* F-line */ case 48: fpspVector = 1; break; /* BSUN */ case 49: fpspVector = 2; break; /* INEXACT */ case 50: fpspVector = 3; break; /* DIVIDE-BY-ZERO */ case 51: fpspVector = 4; break; /* UNDERFLOW */ case 52: fpspVector = 5; break; /* OPERAND ERROR */ case 53: fpspVector = 6; break; /* OVERFLOW */ case 54: fpspVector = 7; break; /* SIGNALLING NAN */ case 55: fpspVector = 8; break; /* UNIMPLEMENTED DATA TYPE */ } *old_handler = M68040FPSPUserExceptionHandlers[fpspVector]; M68040FPSPUserExceptionHandlers[fpspVector] = new_handler; return 1; } /* * Attach floating point exception vectors to M68040FPSP entry points * * NOTE: Uses M68K rather than M68040 in the name so all CPUs having * an FPSP can share the same code in RTEMS proper. */ void M68KFPSPInstallExceptionHandlers (void) { extern void _fpspEntry_fline(); extern void _fpspEntry_bsun(); extern void _fpspEntry_inex(); extern void _fpspEntry_dz(); extern void _fpspEntry_unfl(); extern void _fpspEntry_ovfl(); extern void _fpspEntry_operr(); extern void _fpspEntry_snan(); extern void _fpspEntry_unsupp(); static struct { int vector_number; void (*handler)(); } fpspHandlers[] = { { 11, _fpspEntry_fline }, { 48, _fpspEntry_bsun }, { 49, _fpspEntry_inex }, { 50, _fpspEntry_dz }, { 51, _fpspEntry_unfl }, { 52, _fpspEntry_operr }, { 53, _fpspEntry_ovfl }, { 54, _fpspEntry_snan }, { 55, _fpspEntry_unsupp }, }; int i; proc_ptr oldHandler; for (i = 0 ; i < sizeof fpspHandlers / sizeof fpspHandlers[0] ; i++) { _CPU_ISR_install_raw_handler(fpspHandlers[i].vector_number, fpspHandlers[i].handler, &oldHandler); M68040FPSPUserExceptionHandlers[i] = oldHandler; } _FPSP_install_raw_handler = FPSP_install_raw_handler; }
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