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startup.c
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/*
* Copyright (C) 2014 Freie Universität Berlin
*
* This file is subject to the terms and conditions of the GNU Lesser General
* Public License. See the file LICENSE in the top level directory for more
* details.
*/
/**
* @ingroup cpu_xam3359
* @{
*
* @file startup.c
* @brief Startup code and interrupt vector definition
*
* @author Max Dieckmann <dieckmann@zedat.fu-berlin.de>
* @author Martin Kessel <martin.kessel@fu-berlin.de>* @}
*/
#include <stdint.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)
{
while (1) {asm ("nop");}
}
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)
{
while (1) {asm ("nop");}
}
void isr_bus_fault(void)
{
while (1) {asm ("nop");}
}
void isr_usage_fault(void)
{
while (1) {asm ("nop");}
}
/* 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 */
/* STM 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*/
};