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authorDavid A. Mellis <d.mellis@arduino.cc>2012-09-13 10:41:16 -0400
committerDavid A. Mellis <d.mellis@arduino.cc>2012-09-13 10:41:16 -0400
commit0d9a111face4f3629bcae8e52af843792af3b453 (patch)
tree7cc1b8c1b0c1acb7c90a75f258ce036dac494b17 /firmwares/wifishield/wifi_dnld/src/SOFTWARE_FRAMEWORK/DRIVERS/INTC/exception.x
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+/* 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
+//! @}