| /******************************************************************************************** |
| * arch/avr/src/atmega/atmega_exceptions.S |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. The |
| * ASF licenses this file to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance with the |
| * License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
| * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| * License for the specific language governing permissions and limitations |
| * under the License. |
| * |
| ********************************************************************************************/ |
| |
| /******************************************************************************************** |
| * Included Files |
| ********************************************************************************************/ |
| |
| #include <nuttx/config.h> |
| |
| #include <arch/irq.h> |
| |
| #include "excptmacros.h" |
| |
| /******************************************************************************************** |
| * External Symbols |
| ********************************************************************************************/ |
| |
| .file "atmega_exceptions.S" |
| .global avr_doirq |
| .global avr_fullcontextrestore |
| |
| /******************************************************************************************** |
| * Macros |
| ********************************************************************************************/ |
| |
| /******************************************************************************************** |
| * Exception Vector Handlers |
| ********************************************************************************************/ |
| |
| .section .handlers, "ax", @progbits |
| |
| #if defined(CONFIG_ARCH_CHIP_ATMEGA128) |
| HANDLER atmega_int0, ATMEGA_IRQ_INT0, excpt_common /* External interrupt request 0 */ |
| HANDLER atmega_int1, ATMEGA_IRQ_INT1, excpt_common /* External interrupt request 1 */ |
| HANDLER atmega_int2, ATMEGA_IRQ_INT2, excpt_common /* External interrupt request 2 */ |
| HANDLER atmega_int3, ATMEGA_IRQ_INT3, excpt_common /* External interrupt request 3 */ |
| HANDLER atmega_int4, ATMEGA_IRQ_INT4, excpt_common /* External interrupt request 4 */ |
| HANDLER atmega_int5, ATMEGA_IRQ_INT5, excpt_common /* External interrupt request 5 */ |
| HANDLER atmega_int6, ATMEGA_IRQ_INT6, excpt_common /* External interrupt request 6 */ |
| HANDLER atmega_int7, ATMEGA_IRQ_INT7, excpt_common /* External interrupt request 7 */ |
| HANDLER atmega_t2comp, ATMEGA_IRQ_T2COMP, excpt_common /* TIMER2 COMP timer/counter2 compare match */ |
| HANDLER atmega_t2ovf, ATMEGA_IRQ_T2OVF, excpt_common /* TIMER2 OVF timer/counter2 overflow */ |
| HANDLER atmega_t1capt, ATMEGA_IRQ_T1CAPT, excpt_common /* TIMER1 CAPT timer/counter1 capture event */ |
| HANDLER atmega_t1compa, ATMEGA_IRQ_T1COMPA, excpt_common /* TIMER1 COMPA timer/counter1 compare match a */ |
| HANDLER atmega_t1compb, ATMEGA_IRQ_T1COMPB, excpt_common /* TIMER1 COMPB timer/counter1 compare match b */ |
| HANDLER atmega_t1ovf, ATMEGA_IRQ_T1OVF, excpt_common /* TIMER1 OVF timer/counter1 overflow */ |
| HANDLER atmega_t0comp, ATMEGA_IRQ_T0COMP, excpt_common /* TIMER0 COMP timer/counter0 compare match */ |
| HANDLER atmega_t0ovf, ATMEGA_IRQ_T0OVF, excpt_common /* TIMER0 OVF timer/counter0 overflow */ |
| HANDLER atmega_spi, ATMEGA_IRQ_SPI, excpt_common /* STC SPI serial transfer complete */ |
| HANDLER atmega_u0rx, ATMEGA_IRQ_U0RX, excpt_common /* USART0 RX complete */ |
| HANDLER atmega_u0dre, ATMEGA_IRQ_U0DRE, excpt_common /* USART0 data register empty */ |
| HANDLER atmega_u0tx, ATMEGA_IRQ_U0TX, excpt_common /* USART0 TX complete */ |
| HANDLER atmega_adc, ATMEGA_IRQ_ADC, excpt_common /* ADC conversion complete */ |
| HANDLER atmega_ee, ATMEGA_IRQ_EE, excpt_common /* EEPROM ready */ |
| HANDLER atmega_anacomp, ATMEGA_IRQ_ANACOMP, excpt_common /* ANALOG COMP analog comparator */ |
| HANDLER atmega_t1compc, ATMEGA_IRQ_T1COMPC, excpt_common /* TIMER1 COMPC timer/countre1 compare match c */ |
| HANDLER atmega_t3capt, ATMEGA_IRQ_T3CAPT, excpt_common /* TIMER3 CAPT timer/counter3 capture event */ |
| HANDLER atmega_t3compa, ATMEGA_IRQ_T3COMPA, excpt_common /* TIMER3 COMPA timer/counter3 compare match a */ |
| HANDLER atmega_t3compb, ATMEGA_IRQ_T3COMPB, excpt_common /* TIMER3 COMPB timer/counter3 compare match b */ |
| HANDLER atmega_t3compc, ATMEGA_IRQ_T3COMPC, excpt_common /* TIMER3 COMPC timer/counter3 compare match c */ |
| HANDLER atmega_t3ovf, ATMEGA_IRQ_T3OVF, excpt_common /* TIMER3 OVF timer/counter3 overflow */ |
| HANDLER atmega_u1rx, ATMEGA_IRQ_U1RX, excpt_common /* USART1 RX complete */ |
| HANDLER atmega_u1dre, ATMEGA_IRQ_U1DRE, excpt_common /* USART1 data register empty */ |
| HANDLER atmega_u1tx, ATMEGA_IRQ_U1TX, excpt_common /* USART1 TX complete */ |
| HANDLER atmega_twi, ATMEGA_IRQ_TWI, excpt_common /* TWI two-wire serial interface */ |
| HANDLER atmega_spmrdy, ATMEGA_IRQ_SPMRDY, excpt_common /* Store program memory ready */ |
| #elif defined(CONFIG_ARCH_CHIP_ATMEGA1284P) |
| HANDLER atmega_int0, ATMEGA_IRQ_INT0, excpt_common /* External interrupt request 0 */ |
| HANDLER atmega_int1, ATMEGA_IRQ_INT1, excpt_common /* External interrupt request 1 */ |
| HANDLER atmega_int2, ATMEGA_IRQ_INT2, excpt_common /* External interrupt request 2 */ |
| HANDLER atmega_pcint0, ATMEGA_IRQ_PCINT0, excpt_common /* Pin change interrupt request 0 */ |
| HANDLER atmega_pcint1, ATMEGA_IRQ_PCINT1, excpt_common /* Pin change interrupt request 1 */ |
| HANDLER atmega_pcint2, ATMEGA_IRQ_PCINT2, excpt_common /* Pin change interrupt request 2 */ |
| HANDLER atmega_pcint3, ATMEGA_IRQ_PCINT3, excpt_common /* Pin change interrupt request 3 */ |
| HANDLER atmega_wdt, ATMEGA_IRQ_WDT, excpt_common /* Watchdog time-out interrupt */ |
| HANDLER atmega_t2compa, ATMEGA_IRQ_T2COMPA, excpt_common /* TIMER2 COMPA timer/counter2 compare match */ |
| HANDLER atmega_t2compb, ATMEGA_IRQ_T2COMPB, excpt_common /* TIMER2 COMPB timer/counter2 compare match */ |
| HANDLER atmega_t2ovf, ATMEGA_IRQ_T2OVF, excpt_common /* TIMER2 OVF timer/counter2 overflow */ |
| HANDLER atmega_t1capt, ATMEGA_IRQ_T1CAPT, excpt_common /* TIMER1 CAPT timer/counter1 capture event */ |
| HANDLER atmega_t1compa, ATMEGA_IRQ_T1COMPA, excpt_common /* TIMER1 COMPA timer/counter1 compare match a */ |
| HANDLER atmega_t1compb, ATMEGA_IRQ_T1COMPB, excpt_common /* TIMER1 COMPB timer/counter1 compare match b */ |
| HANDLER atmega_t1ovf, ATMEGA_IRQ_T1OVF, excpt_common /* TIMER1 OVF timer/counter1 overflow */ |
| HANDLER atmega_t0compa, ATMEGA_IRQ_T0COMPA, excpt_common /* TIMER0 COMPA timer/counter0 compare match */ |
| HANDLER atmega_t0compb, ATMEGA_IRQ_T0COMPB, excpt_common /* TIMER0 COMPB timer/counter0 compare match */ |
| HANDLER atmega_t0ovf, ATMEGA_IRQ_T0OVF, excpt_common /* TIMER0 OVF timer/counter0 overflow */ |
| HANDLER atmega_spi, ATMEGA_IRQ_SPI, excpt_common /* STC SPI serial transfer complete */ |
| HANDLER atmega_u0rx, ATMEGA_IRQ_U0RX, excpt_common /* USART0 RX complete */ |
| HANDLER atmega_u0dre, ATMEGA_IRQ_U0DRE, excpt_common /* USART0 data register empty */ |
| HANDLER atmega_u0tx, ATMEGA_IRQ_U0TX, excpt_common /* USART0 TX complete */ |
| HANDLER atmega_anacomp, ATMEGA_IRQ_ANACOMP, excpt_common /* ANALOG COMP analog comparator */ |
| HANDLER atmega_adc, ATMEGA_IRQ_ADC, excpt_common /* ADC conversion complete */ |
| HANDLER atmega_ee, ATMEGA_IRQ_EE, excpt_common /* EEPROM ready */ |
| HANDLER atmega_twi , ATMEGA_IRQ_TWI, excpt_common /* TWI two-wire serial interface */ |
| HANDLER atmega_spmrdy, ATMEGA_IRQ_SPMRDY, excpt_common /* Store program memory ready */ |
| HANDLER atmega_u1rx, ATMEGA_IRQ_U1RX, excpt_common /* USART1 RX complete */ |
| HANDLER atmega_u1dre, ATMEGA_IRQ_U1DRE, excpt_common /* USART1 data register empty */ |
| HANDLER atmega_u1tx, ATMEGA_IRQ_U1TX, excpt_common /* USART1 TX complete */ |
| HANDLER atmega_t3capt, ATMEGA_IRQ_T3CAPT, excpt_common /* TIMER3 CAPT timer/counter3 capture event */ |
| HANDLER atmega_t3compa, ATMEGA_IRQ_T3COMPA, excpt_common /* TIMER3 COMPA timer/counter3 compare match a */ |
| HANDLER atmega_t3compb, ATMEGA_IRQ_T3COMPB, excpt_common /* TIMER3 COMPB timer/counter3 compare match b */ |
| HANDLER atmega_t3ovf, ATMEGA_IRQ_T3OVF, excpt_common /* TIMER3 OVF timer/counter3 overflow */ |
| #elif defined(CONFIG_ARCH_CHIP_ATMEGA2560) |
| HANDLER atmega_int0, ATMEGA_IRQ_INT0, excpt_common /* 0x0002 INT0 External Interrupt Request 0 */ |
| HANDLER atmega_int1, ATMEGA_IRQ_INT1, excpt_common /* 0x0004 INT1 External Interrupt Request 1 */ |
| HANDLER atmega_int2, ATMEGA_IRQ_INT2, excpt_common /* 0x0006 INT2 External Interrupt Request 2 */ |
| HANDLER atmega_int3, ATMEGA_IRQ_INT3, excpt_common /* 0x0008 INT3 External Interrupt Request 3 */ |
| HANDLER atmega_int4, ATMEGA_IRQ_INT4, excpt_common /* 0x000A INT4 External Interrupt Request 4 */ |
| HANDLER atmega_int5, ATMEGA_IRQ_INT5, excpt_common /* 0x000C INT5 External Interrupt Request 5 */ |
| HANDLER atmega_int6, ATMEGA_IRQ_INT6, excpt_common /* 0x000E INT6 External Interrupt Request 6 */ |
| HANDLER atmega_int7, ATMEGA_IRQ_INT7, excpt_common /* 0x0010 INT7 External Interrupt Request 7 */ |
| HANDLER atmega_pcint0, ATMEGA_IRQ_PCINT0, excpt_common /* 0x0012 PCINT0 Pin Change Interrupt Req 0 */ |
| HANDLER atmega_pcint1, ATMEGA_IRQ_PCINT1, excpt_common /* 0x0014 PCINT1 Pin Change Interrupt Req 1 */ |
| HANDLER atmega_pcint2, ATMEGA_IRQ_PCINT2, excpt_common /* 0x0016 PCINT2 Pin Change Interrupt Req 2 */ |
| HANDLER atmega_wdt, ATMEGA_IRQ_WDT, excpt_common /* 0x0018 WDT Watchdog Time-out Interrupt */ |
| HANDLER atmega_tim2_compa, ATMEGA_IRQ_TIM2_COMPA, excpt_common /* 0x001A TIMER2 COMPA Timer/Counter2 Compare Match A */ |
| HANDLER atmega_tim2_compb, ATMEGA_IRQ_TIM2_COMPB, excpt_common /* 0x001C TIMER2 COMPB Timer/Counter2 Compare Match B */ |
| HANDLER atmega_tim2_ovf, ATMEGA_IRQ_TIM2_OVF, excpt_common /* 0x001E TIMER2 OVF Timer/Counter2 Overflow */ |
| HANDLER atmega_tim1_capt, ATMEGA_IRQ_TIM1_CAPT, excpt_common /* 0x0020 TIMER1 CAPT Timer/Counter1 Capture Event */ |
| HANDLER atmega_tim1_compa, ATMEGA_IRQ_TIM1_COMPA, excpt_common /* 0x0022 TIMER1 COMPA Timer/Counter1 Compare Match A */ |
| HANDLER atmega_tim1_compb, ATMEGA_IRQ_TIM1_COMPB, excpt_common /* 0x0024 TIMER1 COMPB Timer/Counter1 Compare Match B */ |
| HANDLER atmega_tim1_compc, ATMEGA_IRQ_TIM1_COMPC, excpt_common /* 0x0026 TIMER1 COMPC Timer/Counter1 Compare Match C */ |
| HANDLER atmega_tim1_ovf, ATMEGA_IRQ_TIM1_OVF, excpt_common /* 0x0028 TIMER1 OVF Timer/Counter1 Overflow */ |
| HANDLER atmega_tim0_compa, ATMEGA_IRQ_TIM0_COMPA, excpt_common /* 0x002A TIMER0 COMPA Timer/Counter0 Compare Match A */ |
| HANDLER atmega_tim0_compb, ATMEGA_IRQ_TIM0_COMPB, excpt_common /* 0x002C TIMER0 COMPB Timer/Counter0 Compare match B */ |
| HANDLER atmega_tim0_ovf, ATMEGA_IRQ_TIM0_OVF, excpt_common /* 0x002E TIMER0 OVF Timer/Counter0 Overflow */ |
| HANDLER atmega_spi_stc, ATMEGA_IRQ_SPI_STC, excpt_common /* 0x0030 SPI, STC SPI Serial Transfer Complete */ |
| HANDLER atmega_u0rx, ATMEGA_IRQ_U0RX, excpt_common /* 0x0032 USART0 RX USART0 Rx Complete */ |
| HANDLER atmega_u0dre, ATMEGA_IRQ_U0DRE, excpt_common /* 0x0034 USART0 UDRE USART0 Data Register Empty */ |
| HANDLER atmega_u0tx, ATMEGA_IRQ_U0TX, excpt_common /* 0x0036 USART0 TX USART0 Tx Complete */ |
| HANDLER atmega_ana_comp, ATMEGA_IRQ_ANA_COMP, excpt_common /* 0x0038 ANALOG COMP Analog Comparator */ |
| HANDLER atmega_adc, ATMEGA_IRQ_ADC, excpt_common /* 0x003A ADC ADC Conversion Complete */ |
| HANDLER atmega_ee_rdy, ATMEGA_IRQ_EE_RDY, excpt_common /* 0x003C EE READY EEPROM Ready */ |
| HANDLER atmega_tim3_capt, ATMEGA_IRQ_TIM3_CAPT, excpt_common /* 0x003E TIMER3 CAPT Timer/Counter3 Capture Event */ |
| HANDLER atmega_tim3_compa, ATMEGA_IRQ_TIM3_COMPA, excpt_common /* 0x0040 TIMER3 COMPA Timer/Counter3 Compare Match A */ |
| HANDLER atmega_tim3_compb, ATMEGA_IRQ_TIM3_COMPB, excpt_common /* 0x0042 TIMER3 COMPB Timer/Counter3 Compare Match B */ |
| HANDLER atmega_tim3_compc, ATMEGA_IRQ_TIM3_COMPC, excpt_common /* 0x0044 TIMER3 COMPC Timer/Counter3 Compare Match C */ |
| HANDLER atmega_tim3_ovf, ATMEGA_IRQ_TIM3_OVF, excpt_common /* 0x0046 TIMER3 OVF Timer/Counter3 Overflow */ |
| HANDLER atmega_u1rx, ATMEGA_IRQ_U1RX, excpt_common /* 0x0048 USART1 RX USART1 Rx Complete */ |
| HANDLER atmega_u1dre, ATMEGA_IRQ_U1DRE, excpt_common /* 0x004A USART1 UDRE USART1 Data Register Empty */ |
| HANDLER atmega_u1tx, ATMEGA_IRQ_U1TX, excpt_common /* 0x004C USART1 TX USART1 Tx Complete */ |
| HANDLER atmega_twi, ATMEGA_IRQ_TWI, excpt_common /* 0x004E TWI 2-wire Serial Interface */ |
| HANDLER atmega_spm_rdy, ATMEGA_IRQ_SPM_RDY, excpt_common /* 0x0050 SPM READY Store Program Memory Ready */ |
| HANDLER atmega_tim4_capt, ATMEGA_IRQ_TIM4_CAPT, excpt_common /* 0x0052 TIMER4 CAPT Timer/Counter4 Capture Event */ |
| HANDLER atmega_tim4_compa, ATMEGA_IRQ_TIM4_COMPA, excpt_common /* 0x0054 TIMER4 COMPA Timer/Counter4 Compare Match A */ |
| HANDLER atmega_tim4_compb, ATMEGA_IRQ_TIM4_COMPB, excpt_common /* 0x0056 TIMER4 COMPB Timer/Counter4 Compare Match B */ |
| HANDLER atmega_tim4_compc, ATMEGA_IRQ_TIM4_COMPC, excpt_common /* 0x0058 TIMER4 COMPC Timer/Counter4 Compare Match C */ |
| HANDLER atmega_tim4_ovf, ATMEGA_IRQ_TIM4_OVF, excpt_common /* 0x005A TIMER4 OVF Timer/Counter4 Overflow */ |
| HANDLER atmega_tim5_capt, ATMEGA_IRQ_TIM5_CAPT, excpt_common /* 0x005C TIMER5 CAPT Timer/Counter5 Capture Event */ |
| HANDLER atmega_tim5_compa, ATMEGA_IRQ_TIM5_COMPA, excpt_common /* 0x005E TIMER5 COMPA Timer/Counter5 Compare Match A */ |
| HANDLER atmega_tim5_compb, ATMEGA_IRQ_TIM5_COMPB, excpt_common /* 0x0060 TIMER5 COMPB Timer/Counter5 Compare Match B */ |
| HANDLER atmega_tim5_compc, ATMEGA_IRQ_TIM5_COMPC, excpt_common /* 0x0062 TIMER5 COMPC Timer/Counter5 Compare Match C */ |
| HANDLER atmega_tim5_ovf, ATMEGA_IRQ_TIM5_OVF, excpt_common /* 0x0064 TIMER5 OVF Timer/Counter5 Overflow */ |
| HANDLER atmega_u2rx, ATMEGA_IRQ_U2RX, excpt_common /* 0x0066 USART1 RX USART2 Rx Complete */ |
| HANDLER atmega_u2dre, ATMEGA_IRQ_U2DRE, excpt_common /* 0x0068 USART1 UDRE USART2 Data Register Empty */ |
| HANDLER atmega_u2tx, ATMEGA_IRQ_U2TX, excpt_common /* 0x006A USART1 TX USART2 Tx Complete */ |
| HANDLER atmega_u3rx, ATMEGA_IRQ_U3RX, excpt_common /* 0x006C USART1 RX USART3 Rx Complete */ |
| HANDLER atmega_u3dre, ATMEGA_IRQ_U3DRE, excpt_common /* 0x006E USART1 UDRE USART3 Data Register Empty */ |
| HANDLER atmega_u3tx, ATMEGA_IRQ_U3TX, excpt_common /* 0x0070 USART1 TX USART3 Tx Complete */ |
| #else |
| # error "Unrecognized chip" |
| #endif |
| |
| /******************************************************************************************** |
| * Name: excpt_common |
| * |
| * Description: |
| * Exception Vector Handlers |
| * |
| * On Entry: |
| * The return PC and the saved r24 is on the stack, r24 now contains the IRQ number |
| * |
| * PC1 |
| * PC0 |
| * R0 |
| * --- <- SP |
| * |
| ********************************************************************************************/ |
| |
| excpt_common: |
| /* Save the remaining registers on the stack, preserving the IRQ number in r14 */ |
| |
| EXCPT_PROLOGUE |
| |
| /* Call avr_doirq with r24 = IRQ number, r22-23 = Pointer to the save structure. The stack |
| * pointer currently points to the save structure (or maybe the save structure -1 since |
| * the push operation post-decrements -- need to REVISIT this). |
| */ |
| |
| in r28, _SFR_IO_ADDR(SPL) /* Get the save structure pointer in a Call-saved register pair */ |
| in r29, _SFR_IO_ADDR(SPH) /* Pointer can be obtained from the stack pointer */ |
| adiw r28, 1 /* Remembering that push post-decrements */ |
| movw r22, r28 /* Pass register save structure as the parameter 2 */ |
| USE_INTSTACK rx, ry, rz /* Switch to the interrupt stack */ |
| call avr_doirq /* Dispatch the interrupt */ |
| RESTORE_STACK rx, ry /* Undo the operations of USE_INTSTACK */ |
| |
| /* up_doiq returns with r24-r25 equal to the new save structure. If no context |
| * switch occurred, this will be the same as the value passed to it in r22-23. |
| * But if a context switch occurs, then the returned value will point not at a |
| * stack frame, but at a register save area inside of the new task's TCB. |
| */ |
| |
| cp r28, r24 |
| cpc r29, r25 |
| breq .Lnoswitch |
| |
| /* A context switch has occurred, jump to avr_fullcontextrestore with r24, r25 |
| * equal to the address of the new register save ared. |
| */ |
| |
| jmp avr_fullcontextrestore |
| |
| /* No context switch occurred.. just return off the stack */ |
| |
| .Lnoswitch: |
| EXCPT_EPILOGUE |
| reti |
| |
| /**************************************************************************************************** |
| * Name: g_intstackalloc |
| ****************************************************************************************************/ |
| |
| #if CONFIG_ARCH_INTERRUPTSTACK > 0 |
| .bss |
| .align 4 |
| .globl g_intstackalloc |
| .type g_intstackalloc, object |
| .globl g_intstacktop |
| .type g_intstacktop, object |
| g_intstackalloc: |
| .skip CONFIG_ARCH_INTERRUPTSTACK |
| g_intstacktop: |
| .size g_intstackalloc, .-g_intstackalloc |
| #endif |
| .end |
