/* This file is part of the ATMEL AVR-UC3-SoftwareFramework-1.7.0 Release */ /*This file is prepared for Doxygen automatic documentation generation.*/ /*! \file ********************************************************************* * * \brief Exception and interrupt vectors. * * This file maps all events supported by an AVR32. * * - Compiler: GNU GCC for AVR32 * - Supported devices: All AVR32 devices with an INTC module can be used. * - AppNote: * * \author Atmel Corporation: http://www.atmel.com \n * Support and FAQ: http://support.atmel.no/ * ******************************************************************************/ /* Copyright (c) 2009 Atmel Corporation. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * 3. The name of Atmel may not be used to endorse or promote products derived * from this software without specific prior written permission. * * 4. This software may only be redistributed and used in connection with an Atmel * AVR product. * * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE * */ #if !__AVR32_UC__ && !__AVR32_AP__ #error Implementation of the AVR32 architecture not supported by the INTC driver. #endif #include <avr32/io.h> //! @{ //! \verbatim .section .exception, "ax", @progbits // Start of Exception Vector Table. // EVBA must be aligned with a power of two strictly greater than the EVBA- // relative offset of the last vector. .balign 0x200 // Export symbol. .global _evba .type _evba, @function _evba: .org 0x000 // Unrecoverable Exception. _handle_Unrecoverable_Exception: rjmp $ .org 0x004 // TLB Multiple Hit. _handle_TLB_Multiple_Hit: rjmp $ .org 0x008 // Bus Error Data Fetch. _handle_Bus_Error_Data_Fetch: rjmp $ .org 0x00C // Bus Error Instruction Fetch. _handle_Bus_Error_Instruction_Fetch: rjmp $ .org 0x010 // NMI. _handle_NMI: rjmp $ .org 0x014 // Instruction Address. _handle_Instruction_Address: rjmp $ .org 0x018 // ITLB Protection. _handle_ITLB_Protection: rjmp $ .org 0x01C // Breakpoint. _handle_Breakpoint: rjmp $ .org 0x020 // Illegal Opcode. _handle_Illegal_Opcode: rjmp $ .org 0x024 // Unimplemented Instruction. _handle_Unimplemented_Instruction: rjmp $ .org 0x028 // Privilege Violation. _handle_Privilege_Violation: rjmp $ .org 0x02C // Floating-Point: UNUSED IN AVR32UC and AVR32AP. _handle_Floating_Point: rjmp $ .org 0x030 // Coprocessor Absent: UNUSED IN AVR32UC. _handle_Coprocessor_Absent: rjmp $ .org 0x034 // Data Address (Read). _handle_Data_Address_Read: rjmp $ .org 0x038 // Data Address (Write). _handle_Data_Address_Write: rjmp $ .org 0x03C // DTLB Protection (Read). _handle_DTLB_Protection_Read: rjmp $ .org 0x040 // DTLB Protection (Write). _handle_DTLB_Protection_Write: rjmp $ .org 0x044 // DTLB Modified: UNUSED IN AVR32UC. _handle_DTLB_Modified: rjmp $ .org 0x050 // ITLB Miss. _handle_ITLB_Miss: rjmp $ .org 0x060 // DTLB Miss (Read). _handle_DTLB_Miss_Read: rjmp $ .org 0x070 // DTLB Miss (Write). _handle_DTLB_Miss_Write: rjmp $ .org 0x100 // Supervisor Call. _handle_Supervisor_Call: rjmp $ // Interrupt support. // The interrupt controller must provide the offset address relative to EVBA. // Important note: // All interrupts call a C function named _get_interrupt_handler. // This function will read group and interrupt line number to then return in // R12 a pointer to a user-provided interrupt handler. .balign 4 .irp priority, 0, 1, 2, 3 _int\priority: #if __AVR32_UC__ // R8-R12, LR, PC and SR are automatically pushed onto the system stack by the // CPU upon interrupt entry. No other register is saved by hardware. #elif __AVR32_AP__ // PC and SR are automatically saved in respectively RAR_INTx and RSR_INTx by // the CPU upon interrupt entry. No other register is saved by hardware. pushm r8-r12, lr #endif mov r12, \priority // Pass the int_level parameter to the _get_interrupt_handler function. call _get_interrupt_handler cp.w r12, 0 // Get the pointer to the interrupt handler returned by the function. #if __AVR32_UC__ movne pc, r12 // If this was not a spurious interrupt (R12 != NULL), jump to the handler. #elif __AVR32_AP__ breq spint\priority // If this was a spurious interrupt (R12 == NULL), branch. st.w --sp, r12 // Push the pointer to the interrupt handler onto the system stack since no register may be altered. popm r8-r12, lr, pc // Restore registers and jump to the handler. spint\priority: popm r8-r12, lr #endif rete // If this was a spurious interrupt (R12 == NULL), return from event handler. .endr // Constant data area. .balign 4 // Values to store in the interrupt priority registers for the various interrupt priority levels. // The interrupt priority registers contain the interrupt priority level and // the EVBA-relative interrupt vector offset. .global ipr_val .type ipr_val, @object ipr_val: .word (AVR32_INTC_INT0 << AVR32_INTC_IPR_INTLEVEL_OFFSET) | (_int0 - _evba),\ (AVR32_INTC_INT1 << AVR32_INTC_IPR_INTLEVEL_OFFSET) | (_int1 - _evba),\ (AVR32_INTC_INT2 << AVR32_INTC_IPR_INTLEVEL_OFFSET) | (_int2 - _evba),\ (AVR32_INTC_INT3 << AVR32_INTC_IPR_INTLEVEL_OFFSET) | (_int3 - _evba) //! \endverbatim //! @}