/* * Copyright (C) 2015 Kaspar Schleiser * 2015 FreshTemp, LLC. * 2014-2015 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_saml21 * @{ * * @file startup.c * @brief Startup code and interrupt vector definition * * @author Thomas Eichinger * @author Kaspar Schleiser * @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(); } void isr_nmi(void) { core_panic(PANIC_NMI_HANDLER, "NMI HANDLER"); } void isr_hard_fault(void) { core_panic(PANIC_HARD_FAULT, "HARD FAULT"); } /** * @brief Default handler is called in case no interrupt handler was defined */ void dummy_handler(void) { core_panic(PANIC_DUMMY_HANDLER, "DUMMY HANDLER"); } /* 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"))); /* SAML21 specific interrupt vector */ void isr_pm(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_wdt(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_rtc(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_eic(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_nvmctrl(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_dmac(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_usb(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_evsys(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_sercom0(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_sercom1(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_sercom2(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_sercom3(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_sercom4(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_sercom5(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_tcc0(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_tcc1(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_tcc2(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_adc(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_ac(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_dac(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_ptc(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_aes(void) __attribute__ ((weak, alias("dummy_handler"))); void isr_trng(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-M0+ 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*) (0UL), /* Reserved */ (void*) (0UL), /* Reserved */ (void*) (0UL), /* Reserved */ (void*) (0UL), /* Reserved */ (void*) (0UL), /* Reserved */ (void*) (0UL), /* Reserved */ (void*) (0UL), /* Reserved */ (void*) isr_svc, /* system call interrupt */ (void*) (0UL), /* Reserved */ (void*) (0UL), /* Reserved */ (void*) isr_pendsv, /* pendSV interrupt, used for task switching in RIOT */ (void*) isr_systick, /* SysTick interrupt, not used in RIOT */ /* Atmel SAML21 specific peripheral handlers */ (void*) isr_pm, /* 0 Power Manager */ (void*) isr_wdt, /* 1 Watchdog Timer */ (void*) isr_rtc, /* 2 Real-Time Counter */ (void*) isr_eic, /* 3 External Interrupt Controller */ (void*) isr_nvmctrl, /* 4 Non-Volatile Memory Controller */ (void*) isr_dmac, /* 5 Direct Memory Access Controller */ (void*) isr_usb, /* 6 Universal Serial Bus */ (void*) isr_evsys, /* 7 Event System Interface */ (void*) isr_sercom0, /* 8 Serial Communication Interface 0 */ (void*) isr_sercom1, /* 9 Serial Communication Interface 1 */ (void*) isr_sercom2, /* 10 Serial Communication Interface 2 */ (void*) isr_sercom3, /* 11 Serial Communication Interface 3 */ (void*) isr_sercom4, /* 12 Serial Communication Interface 4 */ (void*) isr_sercom5, /* 13 Serial Communication Interface 5 */ (void*) isr_tcc0, /* 14 Timer Counter Control 0 */ (void*) isr_tcc1, /* 15 Timer Counter Control 1 */ (void*) isr_tcc2, /* 16 Timer Counter Control 2 */ (void*) isr_tc0, /* 17 Basic Timer Counter 0 */ (void*) isr_tc1, /* 18 Basic Timer Counter 1 */ (void*) isr_tc2, /* 19 Basic Timer Counter 2 */ (void*) isr_tc3, /* 20 Basic Timer Counter 3 */ (void*) isr_tc4, /* 21 Basic Timer Counter 4 */ (void*) isr_adc, /* 22 Analog Digital Converter */ (void*) isr_ac, /* 23 Analog Comparators */ (void*) isr_dac, /* 24 Digital Analog Converter */ (void*) isr_ptc, /* 25 Peripheral Touch Controller */ (void*) isr_aes, /* 26 AES */ (void*) isr_trng, /* 27 TRNG True Random Number Generator */ };