cpu/saml21: optimization of startup code
- make use of common startup code - make use of common exception handlers - renamed startup.c to vectors.cdev/timer
Hauke Petersen
8 years ago
parent
e8dd6afa38
commit
aa583f254d
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/*
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* Copyright (C) 2015 Kaspar Schleiser <kaspar@schleiser.de>
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* 2015 FreshTemp, LLC.
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* 2014-2015 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup cpu_saml21
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* @{
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*
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* @file startup.c
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* @brief Startup code and interrupt vector definition
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*
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* @author Thomas Eichinger <thomas.eichinger@fu-berlin.de>
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* @author Kaspar Schleiser <kaspar@schleiser.de>
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* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
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*
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* @}
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*/
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#include <stdint.h>
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#include "panic.h"
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/**
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* memory markers as defined in the linker script
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*/
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extern uint32_t _sfixed;
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extern uint32_t _efixed;
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extern uint32_t _etext;
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extern uint32_t _srelocate;
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extern uint32_t _erelocate;
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extern uint32_t _szero;
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extern uint32_t _ezero;
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extern uint32_t _sstack;
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extern uint32_t _estack;
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/**
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* @brief functions for initializing the board, std-lib and kernel
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*/
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extern void board_init(void);
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extern void kernel_init(void);
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extern void __libc_init_array(void);
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/**
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* @brief This function is the entry point after a system reset
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*
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* After a system reset, the following steps are necessary and carried out:
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* 1. load data section from flash to ram
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* 2. overwrite uninitialized data section (BSS) with zeros
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* 3. initialize the newlib
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* 4. initialize the board (sync clock, setup std-IO)
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* 5. initialize and start RIOTs kernel
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*/
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void reset_handler(void)
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{
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uint32_t *dst;
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uint32_t *src = &_etext;
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/* load data section from flash to ram */
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for (dst = &_srelocate; dst < &_erelocate; ) {
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*(dst++) = *(src++);
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}
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/* default bss section to zero */
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for (dst = &_szero; dst < &_ezero; ) {
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*(dst++) = 0;
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}
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/* initialize the board and startup the kernel */
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board_init();
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/* initialize std-c library (this should be done after board_init) */
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__libc_init_array();
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/* startup the kernel */
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kernel_init();
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}
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void isr_nmi(void)
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{
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core_panic(PANIC_NMI_HANDLER, "NMI HANDLER");
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}
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void isr_hard_fault(void)
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{
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core_panic(PANIC_HARD_FAULT, "HARD FAULT");
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}
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/**
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* @brief Default handler is called in case no interrupt handler was defined
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*/
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void dummy_handler(void)
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{
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core_panic(PANIC_DUMMY_HANDLER, "DUMMY HANDLER");
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}
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/* Cortex-M specific interrupt vectors */
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void isr_svc(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_pendsv(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_systick(void) __attribute__ ((weak, alias("dummy_handler")));
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/* SAML21 specific interrupt vector */
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void isr_pm(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_wdt(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_rtc(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_eic(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_nvmctrl(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_dmac(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_usb(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_evsys(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_sercom0(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_sercom1(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_sercom2(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_sercom3(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_sercom4(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_sercom5(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_tcc0(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_tcc1(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_tcc2(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_tc0(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_tc1(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_tc2(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_tc3(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_tc4(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_adc(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_ac(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_dac(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_ptc(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_aes(void) __attribute__ ((weak, alias("dummy_handler")));
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void isr_trng(void) __attribute__ ((weak, alias("dummy_handler")));
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/* interrupt vector table */
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__attribute__ ((section(".vectors")))
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const void *interrupt_vector[] = {
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/* Stack pointer */
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(void*) (&_estack), /* pointer to the top of the empty stack */
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/* Cortex-M0+ handlers */
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(void*) reset_handler, /* entry point of the program */
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(void*) isr_nmi, /* non maskable interrupt handler */
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(void*) isr_hard_fault, /* if you end up here its not good */
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(void*) (0UL), /* Reserved */
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(void*) (0UL), /* Reserved */
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(void*) (0UL), /* Reserved */
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(void*) (0UL), /* Reserved */
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(void*) (0UL), /* Reserved */
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(void*) (0UL), /* Reserved */
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(void*) (0UL), /* Reserved */
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(void*) isr_svc, /* system call interrupt */
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(void*) (0UL), /* Reserved */
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(void*) (0UL), /* Reserved */
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(void*) isr_pendsv, /* pendSV interrupt, used for task switching in RIOT */
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(void*) isr_systick, /* SysTick interrupt, not used in RIOT */
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/* Atmel SAML21 specific peripheral handlers */
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(void*) isr_pm, /* 0 Power Manager */
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(void*) isr_wdt, /* 1 Watchdog Timer */
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(void*) isr_rtc, /* 2 Real-Time Counter */
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(void*) isr_eic, /* 3 External Interrupt Controller */
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(void*) isr_nvmctrl, /* 4 Non-Volatile Memory Controller */
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(void*) isr_dmac, /* 5 Direct Memory Access Controller */
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(void*) isr_usb, /* 6 Universal Serial Bus */
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(void*) isr_evsys, /* 7 Event System Interface */
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(void*) isr_sercom0, /* 8 Serial Communication Interface 0 */
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(void*) isr_sercom1, /* 9 Serial Communication Interface 1 */
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(void*) isr_sercom2, /* 10 Serial Communication Interface 2 */
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(void*) isr_sercom3, /* 11 Serial Communication Interface 3 */
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(void*) isr_sercom4, /* 12 Serial Communication Interface 4 */
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(void*) isr_sercom5, /* 13 Serial Communication Interface 5 */
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(void*) isr_tcc0, /* 14 Timer Counter Control 0 */
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(void*) isr_tcc1, /* 15 Timer Counter Control 1 */
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(void*) isr_tcc2, /* 16 Timer Counter Control 2 */
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(void*) isr_tc0, /* 17 Basic Timer Counter 0 */
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(void*) isr_tc1, /* 18 Basic Timer Counter 1 */
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(void*) isr_tc2, /* 19 Basic Timer Counter 2 */
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(void*) isr_tc3, /* 20 Basic Timer Counter 3 */
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(void*) isr_tc4, /* 21 Basic Timer Counter 4 */
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(void*) isr_adc, /* 22 Analog Digital Converter */
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(void*) isr_ac, /* 23 Analog Comparators */
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(void*) isr_dac, /* 24 Digital Analog Converter */
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(void*) isr_ptc, /* 25 Peripheral Touch Controller */
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(void*) isr_aes, /* 26 AES */
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(void*) isr_trng, /* 27 TRNG True Random Number Generator */
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};
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@ -0,0 +1,122 @@
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/*
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* Copyright (C) 2015 Kaspar Schleiser <kaspar@schleiser.de>
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* 2015 FreshTemp, LLC.
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* 2014-2015 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup cpu_saml21
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* @{
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*
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* @file startup.c
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* @brief Startup code and interrupt vector definition
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*
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* @author Thomas Eichinger <thomas.eichinger@fu-berlin.de>
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* @author Kaspar Schleiser <kaspar@schleiser.de>
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* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
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*
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* @}
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*/
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#include <stdint.h>
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#include "vectors_cortexm.h"
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/* get the start of the ISR stack as defined in the linkerscript */
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extern uint32_t _estack;
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/* define a local dummy handler as it needs to be in the same compilation unit
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* as the alias definition */
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void dummy_handler(void) {
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dummy_handler_default();
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}
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/* Cortex-M common interrupt vectors */
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WEAK_DEFAULT void isr_svc(void);
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WEAK_DEFAULT void isr_pendsv(void);
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WEAK_DEFAULT void isr_systick(void);
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/* SAML21 specific interrupt vector */
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WEAK_DEFAULT void isr_pm(void);
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WEAK_DEFAULT void isr_wdt(void);
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WEAK_DEFAULT void isr_rtc(void);
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WEAK_DEFAULT void isr_eic(void);
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WEAK_DEFAULT void isr_nvmctrl(void);
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WEAK_DEFAULT void isr_dmac(void);
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WEAK_DEFAULT void isr_usb(void);
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WEAK_DEFAULT void isr_evsys(void);
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WEAK_DEFAULT void isr_sercom0(void);
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WEAK_DEFAULT void isr_sercom1(void);
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WEAK_DEFAULT void isr_sercom2(void);
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WEAK_DEFAULT void isr_sercom3(void);
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WEAK_DEFAULT void isr_sercom4(void);
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WEAK_DEFAULT void isr_sercom5(void);
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WEAK_DEFAULT void isr_tcc0(void);
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WEAK_DEFAULT void isr_tcc1(void);
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WEAK_DEFAULT void isr_tcc2(void);
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WEAK_DEFAULT void isr_tc0(void);
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WEAK_DEFAULT void isr_tc1(void);
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WEAK_DEFAULT void isr_tc2(void);
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WEAK_DEFAULT void isr_tc3(void);
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WEAK_DEFAULT void isr_tc4(void);
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WEAK_DEFAULT void isr_adc(void);
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WEAK_DEFAULT void isr_ac(void);
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WEAK_DEFAULT void isr_dac(void);
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WEAK_DEFAULT void isr_ptc(void);
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WEAK_DEFAULT void isr_aes(void);
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WEAK_DEFAULT void isr_trng(void);
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/* interrupt vector table */
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ISR_VECTORS const void *interrupt_vector[] = {
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/* Exception stack pointer */
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(void*) (&_estack), /* pointer to the top of the stack */
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/* Cortex-M0+ handlers */
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(void*) reset_handler_default, /* entry point of the program */
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(void*) nmi_default, /* non maskable interrupt handler */
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(void*) hard_fault_default, /* hard fault exception */
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(void*) (0UL), /* reserved */
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(void*) (0UL), /* reserved */
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(void*) (0UL), /* reserved */
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(void*) (0UL), /* reserved */
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(void*) (0UL), /* reserved */
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(void*) (0UL), /* reserved */
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(void*) (0UL), /* reserved */
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(void*) isr_svc, /* system call interrupt, in RIOT used for
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* switching into thread context on boot */
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(void*) (0UL), /* reserved */
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(void*) (0UL), /* reserved */
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(void*) isr_pendsv, /* pendSV interrupt, in RIOT the actual
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* context switching is happening here */
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(void*) isr_systick, /* SysTick interrupt, not used in RIOT */
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/* Atmel SAML21 specific peripheral handlers */
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(void*) isr_pm, /* 0 Power Manager */
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(void*) isr_wdt, /* 1 Watchdog Timer */
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(void*) isr_rtc, /* 2 Real-Time Counter */
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(void*) isr_eic, /* 3 External Interrupt Controller */
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(void*) isr_nvmctrl, /* 4 Non-Volatile Memory Controller */
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(void*) isr_dmac, /* 5 Direct Memory Access Controller */
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(void*) isr_usb, /* 6 Universal Serial Bus */
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(void*) isr_evsys, /* 7 Event System Interface */
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(void*) isr_sercom0, /* 8 Serial Communication Interface 0 */
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(void*) isr_sercom1, /* 9 Serial Communication Interface 1 */
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(void*) isr_sercom2, /* 10 Serial Communication Interface 2 */
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(void*) isr_sercom3, /* 11 Serial Communication Interface 3 */
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(void*) isr_sercom4, /* 12 Serial Communication Interface 4 */
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(void*) isr_sercom5, /* 13 Serial Communication Interface 5 */
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(void*) isr_tcc0, /* 14 Timer Counter Control 0 */
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(void*) isr_tcc1, /* 15 Timer Counter Control 1 */
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(void*) isr_tcc2, /* 16 Timer Counter Control 2 */
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(void*) isr_tc0, /* 17 Basic Timer Counter 0 */
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(void*) isr_tc1, /* 18 Basic Timer Counter 1 */
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(void*) isr_tc2, /* 19 Basic Timer Counter 2 */
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(void*) isr_tc3, /* 20 Basic Timer Counter 3 */
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(void*) isr_tc4, /* 21 Basic Timer Counter 4 */
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(void*) isr_adc, /* 22 Analog Digital Converter */
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(void*) isr_ac, /* 23 Analog Comparators */
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(void*) isr_dac, /* 24 Digital Analog Converter */
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(void*) isr_ptc, /* 25 Peripheral Touch Controller */
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(void*) isr_aes, /* 26 AES */
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(void*) isr_trng, /* 27 TRNG True Random Number Generator */
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};
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