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| 1 | +/* File: startup_ARMCM4.S |
| 2 | + * Purpose: startup file for Cortex-M4 devices. Should use with |
| 3 | + * GCC for ARM Embedded Processors |
| 4 | + * Version: V1.3 |
| 5 | + * Date: 08 Feb 2012 |
| 6 | + * |
| 7 | + * Copyright (c) 2012, ARM Limited |
| 8 | + * All rights reserved. |
| 9 | + * |
| 10 | + * Redistribution and use in source and binary forms, with or without |
| 11 | + * modification, are permitted provided that the following conditions are met: |
| 12 | + * Redistributions of source code must retain the above copyright |
| 13 | + notice, this list of conditions and the following disclaimer. |
| 14 | + * Redistributions in binary form must reproduce the above copyright |
| 15 | + notice, this list of conditions and the following disclaimer in the |
| 16 | + documentation and/or other materials provided with the distribution. |
| 17 | + * Neither the name of the ARM Limited nor the |
| 18 | + names of its contributors may be used to endorse or promote products |
| 19 | + derived from this software without specific prior written permission. |
| 20 | + * |
| 21 | + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND |
| 22 | + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| 23 | + * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 24 | + * DISCLAIMED. IN NO EVENT SHALL ARM LIMITED BE LIABLE FOR ANY |
| 25 | + * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 26 | + * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 27 | + * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| 28 | + * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 29 | + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 30 | + * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | + */ |
| 32 | + .syntax unified |
| 33 | + .arch armv7-m |
| 34 | + |
| 35 | + .section .stack |
| 36 | + .align 3 |
| 37 | +#ifdef __STACK_SIZE |
| 38 | + .equ Stack_Size, __STACK_SIZE |
| 39 | +#else |
| 40 | + .equ Stack_Size, 0x400 |
| 41 | +#endif |
| 42 | + .globl __StackTop |
| 43 | + .globl __StackLimit |
| 44 | +__StackLimit: |
| 45 | + .space Stack_Size |
| 46 | + .size __StackLimit, . - __StackLimit |
| 47 | +__StackTop: |
| 48 | + .size __StackTop, . - __StackTop |
| 49 | + |
| 50 | + .section .heap |
| 51 | + .align 3 |
| 52 | +#ifdef __HEAP_SIZE |
| 53 | + .equ Heap_Size, __HEAP_SIZE |
| 54 | +#else |
| 55 | + .equ Heap_Size, 0xC00 |
| 56 | +#endif |
| 57 | + .globl __HeapBase |
| 58 | + .globl __HeapLimit |
| 59 | +__HeapBase: |
| 60 | + .if Heap_Size |
| 61 | + .space Heap_Size |
| 62 | + .endif |
| 63 | + .size __HeapBase, . - __HeapBase |
| 64 | +__HeapLimit: |
| 65 | + .size __HeapLimit, . - __HeapLimit |
| 66 | + |
| 67 | + .section .isr_vector |
| 68 | + .align 2 |
| 69 | + .globl __isr_vector |
| 70 | +__isr_vector: |
| 71 | + .long __StackTop /* Top of Stack */ |
| 72 | + .long Reset_Handler /* Reset Handler */ |
| 73 | + .long NMI_Handler /* NMI Handler */ |
| 74 | + .long HardFault_Handler /* Hard Fault Handler */ |
| 75 | + .long MemManage_Handler /* MPU Fault Handler */ |
| 76 | + .long BusFault_Handler /* Bus Fault Handler */ |
| 77 | + .long UsageFault_Handler /* Usage Fault Handler */ |
| 78 | + .long 0 /* Reserved */ |
| 79 | + .long 0 /* Reserved */ |
| 80 | + .long 0 /* Reserved */ |
| 81 | + .long 0 /* Reserved */ |
| 82 | + .long SVC_Handler /* SVCall Handler */ |
| 83 | + .long DebugMon_Handler /* Debug Monitor Handler */ |
| 84 | + .long 0 /* Reserved */ |
| 85 | + .long PendSV_Handler /* PendSV Handler */ |
| 86 | + .long SysTick_Handler /* SysTick Handler */ |
| 87 | + |
| 88 | + /* External interrupts */ |
| 89 | + .long WDT_IRQHandler /* 0: Watchdog Timer */ |
| 90 | + .long RTC_IRQHandler /* 1: Real Time Clock */ |
| 91 | + .long TIM0_IRQHandler /* 2: Timer0 / Timer1 */ |
| 92 | + .long TIM2_IRQHandler /* 3: Timer2 / Timer3 */ |
| 93 | + .long MCIA_IRQHandler /* 4: MCIa */ |
| 94 | + .long MCIB_IRQHandler /* 5: MCIb */ |
| 95 | + .long UART0_IRQHandler /* 6: UART0 - DUT FPGA */ |
| 96 | + .long UART1_IRQHandler /* 7: UART1 - DUT FPGA */ |
| 97 | + .long UART2_IRQHandler /* 8: UART2 - DUT FPGA */ |
| 98 | + .long UART4_IRQHandler /* 9: UART4 - not connected */ |
| 99 | + .long AACI_IRQHandler /* 10: AACI / AC97 */ |
| 100 | + .long CLCD_IRQHandler /* 11: CLCD Combined Interrupt */ |
| 101 | + .long ENET_IRQHandler /* 12: Ethernet */ |
| 102 | + .long USBDC_IRQHandler /* 13: USB Device */ |
| 103 | + .long USBHC_IRQHandler /* 14: USB Host Controller */ |
| 104 | + .long CHLCD_IRQHandler /* 15: Character LCD */ |
| 105 | + .long FLEXRAY_IRQHandler /* 16: Flexray */ |
| 106 | + .long CAN_IRQHandler /* 17: CAN */ |
| 107 | + .long LIN_IRQHandler /* 18: LIN */ |
| 108 | + .long I2C_IRQHandler /* 19: I2C ADC/DAC */ |
| 109 | + .long 0 /* 20: Reserved */ |
| 110 | + .long 0 /* 21: Reserved */ |
| 111 | + .long 0 /* 22: Reserved */ |
| 112 | + .long 0 /* 23: Reserved */ |
| 113 | + .long 0 /* 24: Reserved */ |
| 114 | + .long 0 /* 25: Reserved */ |
| 115 | + .long 0 /* 26: Reserved */ |
| 116 | + .long 0 /* 27: Reserved */ |
| 117 | + .long CPU_CLCD_IRQHandler /* 28: Reserved - CPU FPGA CLCD */ |
| 118 | + .long 0 /* 29: Reserved - CPU FPGA */ |
| 119 | + .long UART3_IRQHandler /* 30: UART3 - CPU FPGA */ |
| 120 | + .long SPI_IRQHandler /* 31: SPI Touchscreen - CPU FPGA */ |
| 121 | + |
| 122 | + .size __isr_vector, . - __isr_vector |
| 123 | + |
| 124 | + .text |
| 125 | + .thumb |
| 126 | + .thumb_func |
| 127 | + .align 2 |
| 128 | + .globl Reset_Handler |
| 129 | + .type Reset_Handler, %function |
| 130 | +Reset_Handler: |
| 131 | +/* Loop to copy data from read only memory to RAM. The ranges |
| 132 | + * of copy from/to are specified by following symbols evaluated in |
| 133 | + * linker script. |
| 134 | + * __etext: End of code section, i.e., begin of data sections to copy from. |
| 135 | + * __data_start__/__data_end__: RAM address range that data should be |
| 136 | + * copied to. Both must be aligned to 4 bytes boundary. */ |
| 137 | + |
| 138 | + ldr r1, =__etext |
| 139 | + ldr r2, =__data_start__ |
| 140 | + ldr r3, =__data_end__ |
| 141 | + |
| 142 | + |
| 143 | +/* Here are two copies of loop implemenations. First one favors code size |
| 144 | + * and the second one favors performance. Default uses the first one. |
| 145 | + * Change to "#if 0" to use the second one */ |
| 146 | +.flash_to_ram_loop: |
| 147 | + cmp r2, r3 |
| 148 | + ittt lt |
| 149 | + ldrlt r0, [r1], #4 |
| 150 | + strlt r0, [r2], #4 |
| 151 | + blt .flash_to_ram_loop |
| 152 | + |
| 153 | +.flash_to_ram_loop_end: |
| 154 | + |
| 155 | + |
| 156 | +#ifndef __NO_SYSTEM_INIT |
| 157 | + ldr r0, =SystemInit |
| 158 | + blx r0 |
| 159 | +#endif |
| 160 | + |
| 161 | + ldr r0, =_start |
| 162 | + bx r0 |
| 163 | + .pool |
| 164 | + .size Reset_Handler, . - Reset_Handler |
| 165 | + |
| 166 | +/* Macro to define default handlers. Default handler |
| 167 | + * will be weak symbol and just dead loops. They can be |
| 168 | + * overwritten by other handlers */ |
| 169 | + .macro def_irq_handler handler_name |
| 170 | + .align 1 |
| 171 | + .thumb_func |
| 172 | + .weak \handler_name |
| 173 | + .type \handler_name, %function |
| 174 | +\handler_name : |
| 175 | + b . |
| 176 | + .size \handler_name, . - \handler_name |
| 177 | + .endm |
| 178 | + |
| 179 | + def_irq_handler NMI_Handler |
| 180 | + def_irq_handler HardFault_Handler |
| 181 | + def_irq_handler MemManage_Handler |
| 182 | + def_irq_handler BusFault_Handler |
| 183 | + def_irq_handler UsageFault_Handler |
| 184 | + def_irq_handler SVC_Handler |
| 185 | + def_irq_handler DebugMon_Handler |
| 186 | + def_irq_handler PendSV_Handler |
| 187 | + def_irq_handler SysTick_Handler |
| 188 | + def_irq_handler Default_Handler |
| 189 | + |
| 190 | + def_irq_handler WDT_IRQHandler |
| 191 | + def_irq_handler RTC_IRQHandler |
| 192 | + def_irq_handler TIM0_IRQHandler |
| 193 | + def_irq_handler TIM2_IRQHandler |
| 194 | + def_irq_handler MCIA_IRQHandler |
| 195 | + def_irq_handler MCIB_IRQHandler |
| 196 | + def_irq_handler UART0_IRQHandler |
| 197 | + def_irq_handler UART1_IRQHandler |
| 198 | + def_irq_handler UART2_IRQHandler |
| 199 | + def_irq_handler UART3_IRQHandler |
| 200 | + def_irq_handler UART4_IRQHandler |
| 201 | + def_irq_handler AACI_IRQHandler |
| 202 | + def_irq_handler CLCD_IRQHandler |
| 203 | + def_irq_handler ENET_IRQHandler |
| 204 | + def_irq_handler USBDC_IRQHandler |
| 205 | + def_irq_handler USBHC_IRQHandler |
| 206 | + def_irq_handler CHLCD_IRQHandler |
| 207 | + def_irq_handler FLEXRAY_IRQHandler |
| 208 | + def_irq_handler CAN_IRQHandler |
| 209 | + def_irq_handler LIN_IRQHandler |
| 210 | + def_irq_handler I2C_IRQHandler |
| 211 | + def_irq_handler CPU_CLCD_IRQHandler |
| 212 | + def_irq_handler SPI_IRQHandler |
| 213 | + |
| 214 | + .end |
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