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contiki/platform/cc2538dk/startup-gcc.c

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/*
* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
*
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Neither the name of Texas Instruments Incorporated nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/**
* \addtogroup cc2538
* @{
*
* \file
* Startup code for the cc2538dk platform, to be used when building with gcc
*/
#include "contiki.h"
#include "reg.h"
#include "flash-cca.h"
#include "sys-ctrl.h"
#include "uart.h"
#include <stdint.h>
/*---------------------------------------------------------------------------*/
extern int main(void);
/*---------------------------------------------------------------------------*/
/* System handlers provided here */
void reset_handler(void);
void nmi_handler(void);
void default_handler(void);
/* System Handler and ISR prototypes implemented elsewhere */
void clock_isr(void); /* SysTick Handler */
void gpio_port_a_isr(void);
void gpio_port_b_isr(void);
void gpio_port_c_isr(void);
void gpio_port_d_isr(void);
void rtimer_isr(void);
void cc2538_rf_rx_tx_isr(void);
void cc2538_rf_err_isr(void);
void udma_isr(void);
void udma_err_isr(void);
/* Boot Loader Backdoor selection */
#if FLASH_CCA_CONF_BOOTLDR_BACKDOOR
/* Backdoor enabled, on PA_3 (Select button) */
#define FLASH_CCA_BOOTLDR_CFG (FLASH_CCA_BOOTLDR_CFG_ENABLE \
| ((3 << FLASH_CCA_BOOTLDR_CFG_PORT_A_PIN_S) & FLASH_CCA_BOOTLDR_CFG_PORT_A_PIN_M))
#else
#define FLASH_CCA_BOOTLDR_CFG FLASH_CCA_BOOTLDR_CFG_DISABLE
#endif
/* Link in the USB ISR only if USB is enabled */
#if USB_SERIAL_CONF_ENABLE
void usb_isr(void);
#else
#define usb_isr default_handler
#endif
/* Likewise for the UART[01] ISRs */
#if UART_CONF_ENABLE
void uart_isr(void);
#if UART_BASE==UART_1_BASE
#define uart0_isr default_handler
#define uart1_isr uart_isr
#else
#define uart0_isr uart_isr
#define uart1_isr default_handler
#endif
#else /* UART_CONF_ENABLE */
#define uart0_isr default_handler
#define uart1_isr default_handler
#endif /* UART_CONF_ENABLE */
/*---------------------------------------------------------------------------*/
/* Allocate stack space */
static unsigned long stack[512];
/*---------------------------------------------------------------------------*/
/* Linker construct indicating .text section location */
extern uint8_t _text[0];
/*---------------------------------------------------------------------------*/
__attribute__ ((section(".flashcca"), used))
const flash_cca_lock_page_t __cca = {
FLASH_CCA_BOOTLDR_CFG, /* Boot loader backdoor configuration */
FLASH_CCA_IMAGE_VALID, /* Image valid */
&_text, /* Vector table located at the start of .text */
/* Unlock all pages and debug */
{ 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF }
};
/*---------------------------------------------------------------------------*/
__attribute__ ((section(".vectors"), used))
void(*const vectors[])(void) =
{
(void (*)(void))((unsigned long)stack + sizeof(stack)), /* Stack pointer */
reset_handler, /* Reset handler */
nmi_handler, /* The NMI handler */
default_handler, /* The hard fault handler */
default_handler, /* 4 The MPU fault handler */
default_handler, /* 5 The bus fault handler */
default_handler, /* 6 The usage fault handler */
0, /* 7 Reserved */
0, /* 8 Reserved */
0, /* 9 Reserved */
0, /* 10 Reserved */
default_handler, /* 11 SVCall handler */
default_handler, /* 12 Debug monitor handler */
0, /* 13 Reserved */
default_handler, /* 14 The PendSV handler */
clock_isr, /* 15 The SysTick handler */
gpio_port_a_isr, /* 16 GPIO Port A */
gpio_port_b_isr, /* 17 GPIO Port B */
gpio_port_c_isr, /* 18 GPIO Port C */
gpio_port_d_isr, /* 19 GPIO Port D */
0, /* 20 none */
uart0_isr, /* 21 UART0 Rx and Tx */
uart1_isr, /* 22 UART1 Rx and Tx */
default_handler, /* 23 SSI0 Rx and Tx */
default_handler, /* 24 I2C Master and Slave */
0, /* 25 Reserved */
0, /* 26 Reserved */
0, /* 27 Reserved */
0, /* 28 Reserved */
0, /* 29 Reserved */
default_handler, /* 30 ADC Sequence 0 */
0, /* 31 Reserved */
0, /* 32 Reserved */
0, /* 33 Reserved */
default_handler, /* 34 Watchdog timer, timer 0 */
default_handler, /* 35 Timer 0 subtimer A */
default_handler, /* 36 Timer 0 subtimer B */
default_handler, /* 37 Timer 1 subtimer A */
default_handler, /* 38 Timer 1 subtimer B */
default_handler, /* 39 Timer 2 subtimer A */
default_handler, /* 40 Timer 2 subtimer B */
default_handler, /* 41 Analog Comparator 0 */
default_handler, /* 42 RFCore Rx/Tx (Alternate) */
default_handler, /* 43 RFCore Error (Alternate) */
default_handler, /* 44 System Control */
default_handler, /* 45 FLASH Control */
default_handler, /* 46 AES (Alternate) */
default_handler, /* 47 PKA (Alternate) */
default_handler, /* 48 SM Timer (Alternate) */
default_handler, /* 49 MacTimer (Alternate) */
default_handler, /* 50 SSI1 Rx and Tx */
default_handler, /* 51 Timer 3 subtimer A */
default_handler, /* 52 Timer 3 subtimer B */
0, /* 53 Reserved */
0, /* 54 Reserved */
0, /* 55 Reserved */
0, /* 56 Reserved */
0, /* 57 Reserved */
0, /* 58 Reserved */
0, /* 59 Reserved */
0, /* 60 Reserved */
0, /* 61 Reserved */
udma_isr, /* 62 uDMA */
udma_err_isr, /* 63 uDMA Error */
0, /* 64 64-155 are not in use */
0, /* 65 */
0, /* 66 */
0, /* 67 */
0, /* 68 */
0, /* 69 */
0, /* 70 */
0, /* 71 */
0, /* 72 */
0, /* 73 */
0, /* 74 */
0, /* 75 */
0, /* 76 */
0, /* 77 */
0, /* 78 */
0, /* 79 */
0, /* 80 */
0, /* 81 */
0, /* 82 */
0, /* 83 */
0, /* 84 */
0, /* 85 */
0, /* 86 */
0, /* 87 */
0, /* 88 */
0, /* 89 */
0, /* 90 */
0, /* 91 */
0, /* 92 */
0, /* 93 */
0, /* 94 */
0, /* 95 */
0, /* 96 */
0, /* 97 */
0, /* 98 */
0, /* 99 */
0, /* 100 */
0, /* 101 */
0, /* 102 */
0, /* 103 */
0, /* 104 */
0, /* 105 */
0, /* 106 */
0, /* 107 */
0, /* 108 */
0, /* 109 */
0, /* 110 */
0, /* 111 */
0, /* 112 */
0, /* 113 */
0, /* 114 */
0, /* 115 */
0, /* 116 */
0, /* 117 */
0, /* 118 */
0, /* 119 */
0, /* 120 */
0, /* 121 */
0, /* 122 */
0, /* 123 */
0, /* 124 */
0, /* 125 */
0, /* 126 */
0, /* 127 */
0, /* 128 */
0, /* 129 */
0, /* 130 */
0, /* 131 */
0, /* 132 */
0, /* 133 */
0, /* 134 */
0, /* 135 */
0, /* 136 */
0, /* 137 */
0, /* 138 */
0, /* 139 */
0, /* 140 */
0, /* 141 */
0, /* 142 */
0, /* 143 */
0, /* 144 */
0, /* 145 */
0, /* 146 */
0, /* 147 */
0, /* 148 */
0, /* 149 */
0, /* 150 */
0, /* 151 */
0, /* 152 */
0, /* 153 */
0, /* 154 */
0, /* 155 */
usb_isr, /* 156 USB */
cc2538_rf_rx_tx_isr, /* 157 RFCORE RX/TX */
cc2538_rf_err_isr, /* 158 RFCORE Error */
default_handler, /* 159 AES */
default_handler, /* 160 PKA */
rtimer_isr, /* 161 SM Timer */
default_handler, /* 162 MACTimer */
};
/*---------------------------------------------------------------------------*/
/* Linker constructs indicating .data and .bss segment locations */
extern unsigned long _etext;
extern unsigned long _data;
extern unsigned long _edata;
extern unsigned long _bss;
extern unsigned long _ebss;
/*---------------------------------------------------------------------------*/
/* Weak interrupt handlers. */
void
nmi_handler(void)
{
reset_handler();
while(1);
}
/*---------------------------------------------------------------------------*/
void
default_handler(void)
{
while(1);
}
/*---------------------------------------------------------------------------*/
void
reset_handler(void)
{
unsigned long *pul_src, *pul_dst;
REG(SYS_CTRL_EMUOVR) = 0xFF;
/* Copy the data segment initializers from flash to SRAM. */
pul_src = &_etext;
for(pul_dst = &_data; pul_dst < &_edata;) {
*pul_dst++ = *pul_src++;
}
/* Zero-fill the bss segment. */
__asm(" ldr r0, =_bss\n"
" ldr r1, =_ebss\n"
" mov r2, #0\n"
" .thumb_func\n"
"zero_loop:\n"
" cmp r0, r1\n"
" it lt\n"
" strlt r2, [r0], #4\n" " blt zero_loop");
/* call the application's entry point. */
main();
/* End here if main () returns */
while(1);
}
/*---------------------------------------------------------------------------*/
/** @} */
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