/* * Copyright (C) 2014 Freie Universität Berlin * * This file is subject to the terms and conditions of the GNU Lesser * General Public License v2.1. See the file LICENSE in the top level * directory for more details. */ /** * @ingroup cpu_sam3x8e * @{ * * @file * @brief Startup code and interrupt vector definition * * @author Hauke Petersen * * @} */ #include #include "panic.h" /** * memory markers as defined in the linker script */ extern uint32_t _sfixed; extern uint32_t _efixed; extern uint32_t _etext; extern uint32_t _srelocate; extern uint32_t _erelocate; extern uint32_t _szero; extern uint32_t _ezero; extern uint32_t _sstack; extern uint32_t _estack; /** * @brief functions for initializing the board, std-lib and kernel */ extern void board_init(void); extern void kernel_init(void); extern void __libc_init_array(void); /** * @brief This function is the entry point after a system reset * * After a system reset, the following steps are necessary and carried out: * 1. load data section from flash to ram * 2. overwrite uninitialized data section (BSS) with zeros * 3. initialize the newlib * 4. initialize the board (sync clock, setup std-IO) * 5. initialize and start RIOTs kernel */ void reset_handler(void) { uint32_t *dst; uint32_t *src = &_etext; /* load data section from flash to ram */ for (dst = &_srelocate; dst < &_erelocate; ) { *(dst++) = *(src++); } /* default bss section to zero */ for (dst = &_szero; dst < &_ezero; ) { *(dst++) = 0; } /* initialize the board and startup the kernel */ board_init(); /* initialize std-c library (this should be done after board_init) */ __libc_init_array(); /* startup the kernel */ kernel_init(); } /** * @brief Default handler is called in case no interrupt handler was defined */ void dummy_handler(void) { core_panic(PANIC_DUMMY_HANDLER, "DUMMY HANDLER"); } void isr_nmi(void) { while (1) {asm ("nop");} } void isr_mem_manage(void) { while (1) {asm ("nop");} } void isr_debug_mon(void) { while (1) {asm ("nop");} } void isr_hard_fault(void) { core_panic(PANIC_HARD_FAULT, "HARD FAULT"); } void isr_bus_fault(void) { core_panic(PANIC_BUS_FAULT, "BUS FAULT"); } void isr_usage_fault(void) { core_panic(PANIC_USAGE_FAULT, "USAGE FAULT"); } /* Cortex-M specific interrupt vectors */ void isr_svc(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_pendsv(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_systick(void) __attribute__ ((weak, alias("dummy_handler"))); /* SAM3X8E specific interrupt vector */ void isr_supc(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_rstc(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_rtc(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_rtt(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_wdt(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_pmc(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_efc0(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_efc1(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_uart(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_smc(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_pioa(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_piob(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_pioc(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_piod(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_usart0(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_usart1(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_usart2(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_usart3(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_hsmci(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_twi0(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_twi1(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_spi0(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_ssc(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_tc0(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_tc1(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_tc2(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_tc3(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_tc4(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_tc5(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_tc6(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_tc7(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_tc8(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_pwm(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_adc(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_dacc(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_dmac(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_uotghs(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_trng(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_emac(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_can0(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_can1(void) __attribute__ ((weak, alias("dummy_handler"))); /* interrupt vector table */ __attribute__ ((section(".vectors"))) const void *interrupt_vector[] = { /* Stack pointer */ (void*) (&_estack), /* pointer to the top of the empty stack */ /* Cortex-M handlers */ (void*) reset_handler, /* entry point of the program */ (void*) isr_nmi, /* non maskable interrupt handler */ (void*) isr_hard_fault, /* if you end up here its not good */ (void*) isr_mem_manage, /* memory controller interrupt */ (void*) isr_bus_fault, /* also not good to end up here */ (void*) isr_usage_fault, /* autsch */ (void*) (0UL), /* Reserved */ (void*) (0UL), /* Reserved */ (void*) (0UL), /* Reserved */ (void*) (0UL), /* Reserved */ (void*) isr_svc, /* system call interrupt */ (void*) isr_debug_mon, /* debug interrupt */ (void*) (0UL), /* Reserved */ (void*) isr_pendsv, /* pendSV interrupt, used for task switching in RIOT */ (void*) isr_systick, /* SysTick interrupt, not used in RIOT */ /* SAM3X8E specific peripheral handlers */ (void*) isr_supc, /* 0 supply controller */ (void*) isr_rstc, /* 1 reset controller */ (void*) isr_rtc, /* 2 real time clock */ (void*) isr_rtt, /* 3 real timer timer */ (void*) isr_wdt, /* 4 watchdog timer */ (void*) isr_pmc, /* 5 power management controller */ (void*) isr_efc0, /* 6 enhanced flash controller 0 */ (void*) isr_efc1, /* 7 enhanced flash controller 1 */ (void*) isr_uart, /* 8 universal asynchronous receiver transceiver */ (void*) isr_smc, /* 9 static memory controller */ (void*) (0UL), (void*) isr_pioa, /* 11 GPIO port A */ (void*) isr_piob, /* 12 GPIO port B */ (void*) isr_pioc, /* 13 GPIO port C */ (void*) isr_piod, /* 14 GPIO port D */ (void*) (0UL), (void*) (0UL), (void*) isr_usart0, /* 17 USART0 */ (void*) isr_usart1, /* 18 USART1 */ (void*) isr_usart2, /* 19 USART2 */ (void*) isr_usart3, /* 20 USART3 */ (void*) isr_hsmci, /* 21 multimedia card interface */ (void*) isr_twi0, /* 22 two-wire interface 0 */ (void*) isr_twi1, /* 23 two-wire interface 1 */ (void*) isr_spi0, /* 24 serial peripheral interface */ (void*) (0UL), (void*) isr_ssc, /* 26 synchronous serial controller */ (void*) isr_tc0, /* 27 timer counter 0 */ (void*) isr_tc1, /* 28 timer counter 1 */ (void*) isr_tc2, /* 29 timer counter 2 */ (void*) isr_tc3, /* 30 timer counter 3 */ (void*) isr_tc4, /* 31 timer counter 4 */ (void*) isr_tc5, /* 32 timer counter 5 */ (void*) isr_tc6, /* 33 timer counter 6 */ (void*) isr_tc7, /* 34 timer counter 7 */ (void*) isr_tc8, /* 35 timer counter 8 */ (void*) isr_pwm, /* 36 pulse width modulation controller */ (void*) isr_adc, /* 37 ADC controller */ (void*) isr_dacc, /* 38 DAC controller */ (void*) isr_dmac, /* 39 DMA controller */ (void*) isr_uotghs, /* 40 USB OTG high speed */ (void*) isr_trng, /* 41 true random number generator */ (void*) isr_emac, /* 42 Ethernet MAC*/ (void*) isr_can0, /* 43 CAN controller 0*/ (void*) isr_can1, /* 44 CAN controller 1*/ };