| // int-vector.S - Interrupt Vector Template (for levels > 1) |
| // $Id: //depot/rel/Foxhill/dot.8/Xtensa/OS/xtos/int-vector.S#1 $ |
| |
| // Copyright (c) 2003-2017 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. |
| |
| |
| // To use this template file, define a macro called _INTERRUPT_LEVEL |
| // to be the interrupt level of the vector, include "xtos-internal.h", |
| // then include this file. We use the same template for both high-level |
| // and medium-level interrupts, but not debug level. |
| |
| |
| #define _ASMLANGUAGE |
| #include "xtos-internal.h" |
| #include <xtensa/coreasm.h> |
| #include <xtensa/config/system.h> |
| |
| |
| #if XCHAL_HAVE_INTERRUPTS && (_INTERRUPT_LEVEL <= XCHAL_NUM_INTLEVELS) && (_INTERRUPT_LEVEL != XCHAL_DEBUGLEVEL) |
| |
| .begin literal_prefix LABEL(.Level,InterruptVector) |
| .section LABEL(.Level,InterruptVector.text), "ax" |
| .align 4 |
| .global LABEL(_Level,Vector) |
| LABEL(_Level,Vector): |
| // Medium and high priority interrupt vector: |
| |
| # if HAVE_XSR |
| // With XSR, we can use this vector which has the advantage of being ROMable |
| // without requiring the handler to also be in ROM; however, it requires |
| // initializing the EXCSAVEn register (see reset-vector.S) and a slightly |
| // different save/restore sequence in the handler: |
| hw_erratum_487_fix |
| xchgsr excsave _INTERRUPT_LEVEL a2 |
| jx a2 |
| |
| // Pull-in the real handler by reference, to ensure the reset vector gets it: |
| .global LABEL(_Level,FromVector) |
| |
| # else |
| writesr excsave _INTERRUPT_LEVEL a2 |
| movi a2, LABEL(_Level,FromVector) |
| jx a2 |
| # endif |
| |
| .size LABEL(_Level,Vector), . - LABEL(_Level,Vector) |
| .text |
| .end literal_prefix |
| |
| #endif /* interrupt at that level */ |
| |