+++ /dev/null
-// interrupt-table.S - Interrupt handler table and default handler
-
-// Copyright (c) 2004-2010 Tensilica Inc.
-//
-// Permission is hereby granted, free of charge, to any person obtaining
-// a copy of this software and associated documentation files (the
-// "Software"), to deal in the Software without restriction, including
-// without limitation the rights to use, copy, modify, merge, publish,
-// distribute, sublicense, and/or sell copies of the Software, and to
-// permit persons to whom the Software is furnished to do so, subject to
-// the following conditions:
-//
-// The above copyright notice and this permission notice shall be included
-// in all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
-// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
-// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
-// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
-// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-#include <xtensa/coreasm.h>
-#include <xtensa/config/specreg.h>
-#include "xtos-internal.h"
-#ifdef SIMULATOR
-#include <xtensa/simcall.h>
-#endif
-
-
-#if XCHAL_HAVE_INTERRUPTS
-
- .data
-
- .global _xtos_intstruct
- .align 8
-_xtos_intstruct:
-# if XTOS_VIRTUAL_INTENABLE
- .global _xtos_enabled
- .type _xtos_enabled,@object
- .size _xtos_enabled,4
- .global _xtos_vpri_enabled
- .type _xtos_vpri_enabled,@object
- .size _xtos_vpri_enabled,4
-_xtos_enabled: .word 0
-_xtos_vpri_enabled: .word 0xFFFFFFFF
-# endif
-# if XTOS_VIRTUAL_INTERRUPT
-# error Virtualized INTERRUPT register not yet supported.
- .global _xtos_pending
- .type _xtos_pending,@object
- .size _xtos_pending,4
-_xtos_pending: .word 0
-# endif
-
- /*
- * Table of C-level interrupt handlers (and args, etc) for each interrupt.
- * NOTE: if the NSA/NSAU instructions are configured, then to save a few
- * cycles in the interrupt dispatcher code, this table is filled in reverse.
- * C code uses the MAPINT() macro defined in xtos-internal.h to index entries.
- * NOTE: Under some conditions (turned off by default in xtos-params.h),
- * this table gets properly initialized by the _xtos_init() function in
- * init.c . NOTA: A future enhancement may be to always configure
- * and build this table at build-time rather than ever doing it at run-time.
- */
-#define i .Li /* workaround a silly GDB testsuite regression */
- .data
- .global _xtos_interrupt_table
- .align 8
-_xtos_interrupt_table:
- .set i, XCHAL_HAVE_NSA*(XCHAL_NUM_INTERRUPTS-1)
- .rept XCHAL_NUM_INTERRUPTS
- .word _xtos_unhandled_interrupt
- .word i // parameter: interrupt number
- .set i, i+1-(XCHAL_HAVE_NSA*2)
- .endr
-
-# if XIE_EXTEND
- /* MUST *IMMEDIATELY* follow _xtos_interrupt_table: */
- .global _xtos_interrupt_mask_table
-_xtos_interrupt_mask_table:
- .set i, XCHAL_HAVE_NSA*(XCHAL_NUM_INTERRUPTS-1)
- .rept XCHAL_NUM_INTERRUPTS
- /* Default to all low-priority (level-one) interrupts at their own virtual priority: */
-# if XTOS_SUBPRI_ORDER == XTOS_SPO_ZERO_HI
- .word ((1<<i)-1) | ~XCHAL_LOWPRI_MASK // vpri_mask default - lower-numbered ints (and high/medium-pri ints) pre-empt other low-pri ints
-# else
- .word (-2*(1<<i)) | ~XCHAL_LOWPRI_MASK // vpri_mask default - higher-numbered ints (and high/medium-pri ints) pre-empt other low-pri ints
-# endif
- .word (1<<i) // level_mask default - each low-pri (level-one) interrupt at its own subpriority
- .set i, i+1-(XCHAL_HAVE_NSA*2)
- .endr
-# endif /*XIE_EXTEND*/
-
-#endif /* XCHAL_HAVE_INTERRUPTS */
-
- .text
-
-
-
-#if XCHAL_HAVE_INTERRUPTS
-
- //
- // void _xtos_unhandled_interrupt( int n );
- //
- // Default/empty interrupt handler.
- // This is used for interrupts with no registered handler.
- // Parameter n is the interrupt number (0 thru 31).
- //
- .text
- .align 4
- .global _xtos_unhandled_interrupt
- .type _xtos_unhandled_interrupt,@function
-_xtos_unhandled_interrupt:
- abi_entry
-# if XCHAL_HAVE_DEBUG
- // Break into the debugger if one is present and active:
-# if XCHAL_NUM_INTLEVELS > XCHAL_DEBUGLEVEL
- rsil a3, XCHAL_DEBUGLEVEL-1 // ensure break takes effect
-# endif
- break 1, 15 // unhandled (unregistered) interrupt $a2
-//# elif defined(SIMULATOR)
-// addmi a2, a2, SYS_unhandled_interrupt ...
-// simcall // unhandled interrupt
-# else
-1: j 1b // unhandled interrupt - loop forever
-# endif
- abi_return
-
- .size _xtos_unhandled_interrupt, . - _xtos_unhandled_interrupt
-
-#endif /* XCHAL_HAVE_INTERRUPTS */
-