RIOT-OS/RIOT
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RIOT/cpu/cc2538/startup.c
Hauke Petersen e7fbaf3815 cpu: removed NAKED attribute from ISRs 
- removed the __attribute__((naked)) from ISRs
- removed ISR_ENTER() and ISR_EXIT() macros

Rationale: Cortex-Mx MCUs save registers R0-R4 automatically
on calling ISRs. The naked attribute tells the compiler not
to save any other registers. This is fine, as long as the
code in the ISR is not nested. If nested, it will use also
R4 and R5, which will then lead to currupted registers on
exit of the ISR. Removing the naked will fix this.
2014-10-30 19:33:32 +01:00

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9.7 KiB
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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 v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @ingroup cpu_cc2538
* @{
*
* @file startup.c
* @brief Startup code and interrupt vector definition
*
* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
* @author Ian Martin <ian@locicontrols.com>
*/
#include <stdint.h>
#include "board.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")));
/* CC2538 specific interrupt vector */
void isr_gpioa(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_gpiob(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_gpioc(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_gpiod(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_uart0(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_uart1(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_ssi0(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_i2c(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_adc(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_watchdog(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_timer0_chan0(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_timer0_chan1(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_timer1_chan0(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_timer1_chan1(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_timer2_chan0(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_timer2_chan1(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_comp(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_rfcoretx(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_rfcoreerr(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_icepick(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_flash(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_aes(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_pka(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_sleepmode(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_mactimer(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_ssi1(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_timer3_chan0(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_timer3_chan1(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_usb(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_dma(void) __attribute__ ((weak, alias("dummy_handler")));
void isr_dmaerr(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 */
/* CC2538 specific peripheral handlers */
(void*) isr_gpioa, /* 16 GPIO Port A */
(void*) isr_gpiob, /* 17 GPIO Port B */
(void*) isr_gpioc, /* 18 GPIO Port C */
(void*) isr_gpiod, /* 19 GPIO Port D */
(void*) (0UL), /* 20 none */
(void*) isr_uart0, /* 21 UART0 Rx and Tx */
(void*) isr_uart1, /* 22 UART1 Rx and Tx */
(void*) isr_ssi0, /* 23 SSI0 Rx and Tx */
(void*) isr_i2c, /* 24 I2C Master and Slave */
(void*) (0UL), /* 25 Reserved */
(void*) (0UL), /* 26 Reserved */
(void*) (0UL), /* 27 Reserved */
(void*) (0UL), /* 28 Reserved */
(void*) (0UL), /* 29 Reserved */
(void*) isr_adc, /* 30 ADC Sequence 0 */
(void*) (0UL), /* 31 Reserved */
(void*) (0UL), /* 32 Reserved */
(void*) (0UL), /* 33 Reserved */
(void*) isr_watchdog, /* 34 Watchdog timer, timer 0 */
(void*) isr_timer0_chan0, /* 35 Timer 0 subtimer A */
(void*) isr_timer0_chan1, /* 36 Timer 0 subtimer B */
(void*) isr_timer1_chan0, /* 37 Timer 1 subtimer A */
(void*) isr_timer1_chan1, /* 38 Timer 1 subtimer B */
(void*) isr_timer2_chan0, /* 39 Timer 2 subtimer A */
(void*) isr_timer2_chan1, /* 40 Timer 2 subtimer B */
(void*) isr_comp, /* 41 Analog Comparator 0 */
(void*) isr_rfcoretx, /* 42 RFCore Rx/Tx */
(void*) isr_rfcoreerr, /* 43 RFCore Error */
(void*) isr_icepick, /* 44 IcePick */
(void*) isr_flash, /* 45 FLASH Control */
(void*) isr_aes, /* 46 AES */
(void*) isr_pka, /* 47 PKA */
(void*) isr_sleepmode, /* 48 Sleep Timer */
(void*) isr_mactimer, /* 49 MacTimer */
(void*) isr_ssi1, /* 50 SSI1 Rx and Tx */
(void*) isr_timer3_chan0, /* 51 Timer 3 subtimer A */
(void*) isr_timer3_chan1, /* 52 Timer 3 subtimer B */
(void*) (0UL), /* 53 Reserved */
(void*) (0UL), /* 54 Reserved */
(void*) (0UL), /* 55 Reserved */
(void*) (0UL), /* 56 Reserved */
(void*) (0UL), /* 57 Reserved */
(void*) (0UL), /* 58 Reserved */
(void*) (0UL), /* 59 Reserved */
(void*) isr_usb, /* 60 USB 2538 */
(void*) (0UL), /* 61 Reserved */
(void*) isr_dma, /* 62 uDMA */
(void*) isr_dmaerr, /* 63 uDMA Error */
};
#if UPDATE_CCA
/**
* @brief Flash Customer Configuration Area (CCA)
*
* Defines bootloader backdoor configuration, boot image validity and base address, and flash page lock bits.
*/
__attribute__((section(".flashcca"), used))
const uint32_t cca[] = {
/* Bootloader Backdoor Configuration: */
0xe0ffffff | (CCA_BACKDOOR_ENABLE << 28) | (CCA_BACKDOOR_ACTIVE_LEVEL << 27) | (CCA_BACKDOOR_PORT_A_PIN << 24),
0x00000000, /**< Image Valid */
(uintptr_t)interrupt_vector, /**< Application Entry Point */
/* Unlock all pages and debug: */
0xffffffff,
0xffffffff,
0xffffffff,
0xffffffff,
0xffffffff,
0xffffffff,
0xffffffff,
0xffffffff,
};
#endif
/** @} */
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