Eric Lewiston / mbed-src

mbed library sources

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targets/cmsis/TARGET_NXP/TARGET_LPC81X/TOOLCHAIN_GCC_ARM/startup_LPC81X.S@614:9d86c2ae5de0, 2015-09-01 (annotated)

Committer:
mbed_official
Date:
Tue Sep 01 16:00:09 2015 +0100
Revision:
614:9d86c2ae5de0
Synchronized with git revision 483bb0197fd032956a31330bd6c6eb50758f2dda



Full URL: https://github.com/mbedmicro/mbed/commit/483bb0197fd032956a31330bd6c6eb50758f2dda/



LPC81X: reduce code size and add ARM_GCC support

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 614:9d86c2ae5de0 1 /* File: startup_ARMCM0.S
mbed_official 614:9d86c2ae5de0 2 * Purpose: startup file for Cortex-M0 devices. Should use with
mbed_official 614:9d86c2ae5de0 3 * GCC for ARM Embedded Processors
mbed_official 614:9d86c2ae5de0 4 * Version: V1.2
mbed_official 614:9d86c2ae5de0 5 * Date: 15 Nov 2011
mbed_official 614:9d86c2ae5de0 6 *
mbed_official 614:9d86c2ae5de0 7 * Copyright (c) 2011, ARM Limited
mbed_official 614:9d86c2ae5de0 8 * All rights reserved.
mbed_official 614:9d86c2ae5de0 9 *
mbed_official 614:9d86c2ae5de0 10 * Redistribution and use in source and binary forms, with or without
mbed_official 614:9d86c2ae5de0 11 * modification, are permitted provided that the following conditions are met:
mbed_official 614:9d86c2ae5de0 12 * Redistributions of source code must retain the above copyright
mbed_official 614:9d86c2ae5de0 13 notice, this list of conditions and the following disclaimer.
mbed_official 614:9d86c2ae5de0 14 * Redistributions in binary form must reproduce the above copyright
mbed_official 614:9d86c2ae5de0 15 notice, this list of conditions and the following disclaimer in the
mbed_official 614:9d86c2ae5de0 16 documentation and/or other materials provided with the distribution.
mbed_official 614:9d86c2ae5de0 17 * Neither the name of the ARM Limited nor the
mbed_official 614:9d86c2ae5de0 18 names of its contributors may be used to endorse or promote products
mbed_official 614:9d86c2ae5de0 19 derived from this software without specific prior written permission.
mbed_official 614:9d86c2ae5de0 20 *
mbed_official 614:9d86c2ae5de0 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
mbed_official 614:9d86c2ae5de0 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
mbed_official 614:9d86c2ae5de0 23 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 614:9d86c2ae5de0 24 * DISCLAIMED. IN NO EVENT SHALL ARM LIMITED BE LIABLE FOR ANY
mbed_official 614:9d86c2ae5de0 25 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
mbed_official 614:9d86c2ae5de0 26 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
mbed_official 614:9d86c2ae5de0 27 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
mbed_official 614:9d86c2ae5de0 28 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
mbed_official 614:9d86c2ae5de0 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
mbed_official 614:9d86c2ae5de0 30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 614:9d86c2ae5de0 31 */
mbed_official 614:9d86c2ae5de0 32 .syntax unified
mbed_official 614:9d86c2ae5de0 33 .arch armv6-m
mbed_official 614:9d86c2ae5de0 34
mbed_official 614:9d86c2ae5de0 35 /* Memory Model
mbed_official 614:9d86c2ae5de0 36 The HEAP starts at the end of the DATA section and grows upward.
mbed_official 614:9d86c2ae5de0 37
mbed_official 614:9d86c2ae5de0 38 The STACK starts at the end of the RAM and grows downward.
mbed_official 614:9d86c2ae5de0 39
mbed_official 614:9d86c2ae5de0 40 The HEAP and stack STACK are only checked at compile time:
mbed_official 614:9d86c2ae5de0 41 (DATA_SIZE + HEAP_SIZE + STACK_SIZE) < RAM_SIZE
mbed_official 614:9d86c2ae5de0 42
mbed_official 614:9d86c2ae5de0 43 This is just a check for the bare minimum for the Heap+Stack area before
mbed_official 614:9d86c2ae5de0 44 aborting compilation, it is not the run time limit:
mbed_official 614:9d86c2ae5de0 45 Heap_Size + Stack_Size = 0x80 + 0x80 = 0x100
mbed_official 614:9d86c2ae5de0 46 */
mbed_official 614:9d86c2ae5de0 47 .section .stack
mbed_official 614:9d86c2ae5de0 48 .align 3
mbed_official 614:9d86c2ae5de0 49 #ifdef __STACK_SIZE
mbed_official 614:9d86c2ae5de0 50 .equ Stack_Size, __STACK_SIZE
mbed_official 614:9d86c2ae5de0 51 #else
mbed_official 614:9d86c2ae5de0 52 .equ Stack_Size, 0x80
mbed_official 614:9d86c2ae5de0 53 #endif
mbed_official 614:9d86c2ae5de0 54 .globl __StackTop
mbed_official 614:9d86c2ae5de0 55 .globl __StackLimit
mbed_official 614:9d86c2ae5de0 56 __StackLimit:
mbed_official 614:9d86c2ae5de0 57 .space Stack_Size
mbed_official 614:9d86c2ae5de0 58 .size __StackLimit, . - __StackLimit
mbed_official 614:9d86c2ae5de0 59 __StackTop:
mbed_official 614:9d86c2ae5de0 60 .size __StackTop, . - __StackTop
mbed_official 614:9d86c2ae5de0 61
mbed_official 614:9d86c2ae5de0 62 .section .heap
mbed_official 614:9d86c2ae5de0 63 .align 3
mbed_official 614:9d86c2ae5de0 64 #ifdef __HEAP_SIZE
mbed_official 614:9d86c2ae5de0 65 .equ Heap_Size, __HEAP_SIZE
mbed_official 614:9d86c2ae5de0 66 #else
mbed_official 614:9d86c2ae5de0 67 .equ Heap_Size, 0x80
mbed_official 614:9d86c2ae5de0 68 #endif
mbed_official 614:9d86c2ae5de0 69 .globl __HeapBase
mbed_official 614:9d86c2ae5de0 70 .globl __HeapLimit
mbed_official 614:9d86c2ae5de0 71 __HeapBase:
mbed_official 614:9d86c2ae5de0 72 .space Heap_Size
mbed_official 614:9d86c2ae5de0 73 .size __HeapBase, . - __HeapBase
mbed_official 614:9d86c2ae5de0 74 __HeapLimit:
mbed_official 614:9d86c2ae5de0 75 .size __HeapLimit, . - __HeapLimit
mbed_official 614:9d86c2ae5de0 76
mbed_official 614:9d86c2ae5de0 77 .section .isr_vector
mbed_official 614:9d86c2ae5de0 78 .align 2
mbed_official 614:9d86c2ae5de0 79 .globl __isr_vector
mbed_official 614:9d86c2ae5de0 80 __isr_vector:
mbed_official 614:9d86c2ae5de0 81 .long __StackTop /* Top of Stack */
mbed_official 614:9d86c2ae5de0 82 .long Reset_Handler /* Reset Handler */
mbed_official 614:9d86c2ae5de0 83 .long NMI_Handler /* NMI Handler */
mbed_official 614:9d86c2ae5de0 84 .long HardFault_Handler /* Hard Fault Handler */
mbed_official 614:9d86c2ae5de0 85 .long 0 /* Reserved */
mbed_official 614:9d86c2ae5de0 86 .long 0 /* Reserved */
mbed_official 614:9d86c2ae5de0 87 .long 0 /* Reserved */
mbed_official 614:9d86c2ae5de0 88 .long 0 /* Reserved */
mbed_official 614:9d86c2ae5de0 89 .long 0 /* Reserved */
mbed_official 614:9d86c2ae5de0 90 .long 0 /* Reserved */
mbed_official 614:9d86c2ae5de0 91 .long 0 /* Reserved */
mbed_official 614:9d86c2ae5de0 92 .long SVC_Handler /* SVCall Handler */
mbed_official 614:9d86c2ae5de0 93 .long 0 /* Reserved */
mbed_official 614:9d86c2ae5de0 94 .long 0 /* Reserved */
mbed_official 614:9d86c2ae5de0 95 .long PendSV_Handler /* PendSV Handler */
mbed_official 614:9d86c2ae5de0 96 .long SysTick_Handler /* SysTick Handler */
mbed_official 614:9d86c2ae5de0 97
mbed_official 614:9d86c2ae5de0 98 /* LPC810 interrupts */
mbed_official 614:9d86c2ae5de0 99 .long SPI0_IRQHandler // SPI0 controller
mbed_official 614:9d86c2ae5de0 100 .long SPI1_IRQHandler // SPI1 controller
mbed_official 614:9d86c2ae5de0 101 .long 0 // Reserved
mbed_official 614:9d86c2ae5de0 102 .long UART0_IRQHandler // UART0
mbed_official 614:9d86c2ae5de0 103 .long UART1_IRQHandler // UART1
mbed_official 614:9d86c2ae5de0 104 .long UART2_IRQHandler // UART2
mbed_official 614:9d86c2ae5de0 105 .long 0 // Reserved
mbed_official 614:9d86c2ae5de0 106 .long 0 // Reserved
mbed_official 614:9d86c2ae5de0 107 .long I2C_IRQHandler // I2C controller
mbed_official 614:9d86c2ae5de0 108 .long SCT_IRQHandler // Smart Counter Timer
mbed_official 614:9d86c2ae5de0 109 .long MRT_IRQHandler // Multi-Rate Timer
mbed_official 614:9d86c2ae5de0 110 .long CMP_IRQHandler // Comparator
mbed_official 614:9d86c2ae5de0 111 .long WDT_IRQHandler // PIO1 (0:11)
mbed_official 614:9d86c2ae5de0 112 .long BOD_IRQHandler // Brown Out Detect
mbed_official 614:9d86c2ae5de0 113 .long 0 // Reserved
mbed_official 614:9d86c2ae5de0 114 .long WKT_IRQHandler // Wakeup timer
mbed_official 614:9d86c2ae5de0 115 .long 0 // Reserved
mbed_official 614:9d86c2ae5de0 116 .long 0 // Reserved
mbed_official 614:9d86c2ae5de0 117 .long 0 // Reserved
mbed_official 614:9d86c2ae5de0 118 .long 0 // Reserved
mbed_official 614:9d86c2ae5de0 119 .long 0 // Reserved
mbed_official 614:9d86c2ae5de0 120 .long 0 // Reserved
mbed_official 614:9d86c2ae5de0 121 .long 0 // Reserved
mbed_official 614:9d86c2ae5de0 122 .long 0 // Reserved
mbed_official 614:9d86c2ae5de0 123 .long PININT0_IRQHandler // PIO INT0
mbed_official 614:9d86c2ae5de0 124 .long PININT1_IRQHandler // PIO INT1
mbed_official 614:9d86c2ae5de0 125 .long PININT2_IRQHandler // PIO INT2
mbed_official 614:9d86c2ae5de0 126 .long PININT3_IRQHandler // PIO INT3
mbed_official 614:9d86c2ae5de0 127 .long PININT4_IRQHandler // PIO INT4
mbed_official 614:9d86c2ae5de0 128 .long PININT5_IRQHandler // PIO INT5
mbed_official 614:9d86c2ae5de0 129 .long PININT6_IRQHandler // PIO INT6
mbed_official 614:9d86c2ae5de0 130 .long PININT7_IRQHandler // PIO INT7
mbed_official 614:9d86c2ae5de0 131
mbed_official 614:9d86c2ae5de0 132 .size __isr_vector, . - __isr_vector
mbed_official 614:9d86c2ae5de0 133
mbed_official 614:9d86c2ae5de0 134 .section .text.Reset_Handler
mbed_official 614:9d86c2ae5de0 135 .thumb
mbed_official 614:9d86c2ae5de0 136 .thumb_func
mbed_official 614:9d86c2ae5de0 137 .align 2
mbed_official 614:9d86c2ae5de0 138 .globl Reset_Handler
mbed_official 614:9d86c2ae5de0 139 .type Reset_Handler, %function
mbed_official 614:9d86c2ae5de0 140 Reset_Handler:
mbed_official 614:9d86c2ae5de0 141 /* Loop to copy data from read only memory to RAM. The ranges
mbed_official 614:9d86c2ae5de0 142 * of copy from/to are specified by following symbols evaluated in
mbed_official 614:9d86c2ae5de0 143 * linker script.
mbed_official 614:9d86c2ae5de0 144 * __etext: End of code section, i.e., begin of data sections to copy from.
mbed_official 614:9d86c2ae5de0 145 * __data_start__/__data_end__: RAM address range that data should be
mbed_official 614:9d86c2ae5de0 146 * copied to. Both must be aligned to 4 bytes boundary. */
mbed_official 614:9d86c2ae5de0 147
mbed_official 614:9d86c2ae5de0 148 ldr r1, =__etext
mbed_official 614:9d86c2ae5de0 149 ldr r2, =__data_start__
mbed_official 614:9d86c2ae5de0 150 ldr r3, =__data_end__
mbed_official 614:9d86c2ae5de0 151
mbed_official 614:9d86c2ae5de0 152 subs r3, r2
mbed_official 614:9d86c2ae5de0 153 ble .Lflash_to_ram_loop_end
mbed_official 614:9d86c2ae5de0 154
mbed_official 614:9d86c2ae5de0 155 movs r4, 0
mbed_official 614:9d86c2ae5de0 156 .Lflash_to_ram_loop:
mbed_official 614:9d86c2ae5de0 157 ldr r0, [r1,r4]
mbed_official 614:9d86c2ae5de0 158 str r0, [r2,r4]
mbed_official 614:9d86c2ae5de0 159 adds r4, 4
mbed_official 614:9d86c2ae5de0 160 cmp r4, r3
mbed_official 614:9d86c2ae5de0 161 blt .Lflash_to_ram_loop
mbed_official 614:9d86c2ae5de0 162 .Lflash_to_ram_loop_end:
mbed_official 614:9d86c2ae5de0 163
mbed_official 614:9d86c2ae5de0 164 ldr r0, =SystemInit
mbed_official 614:9d86c2ae5de0 165 blx r0
mbed_official 614:9d86c2ae5de0 166 ldr r0, =_start
mbed_official 614:9d86c2ae5de0 167 bx r0
mbed_official 614:9d86c2ae5de0 168 .pool
mbed_official 614:9d86c2ae5de0 169 .size Reset_Handler, . - Reset_Handler
mbed_official 614:9d86c2ae5de0 170
mbed_official 614:9d86c2ae5de0 171 .text
mbed_official 614:9d86c2ae5de0 172 /* Macro to define default handlers. Default handler
mbed_official 614:9d86c2ae5de0 173 * will be weak symbol and just dead loops. They can be
mbed_official 614:9d86c2ae5de0 174 * overwritten by other handlers */
mbed_official 614:9d86c2ae5de0 175 .macro def_default_handler handler_name
mbed_official 614:9d86c2ae5de0 176 .align 1
mbed_official 614:9d86c2ae5de0 177 .thumb_func
mbed_official 614:9d86c2ae5de0 178 .weak \handler_name
mbed_official 614:9d86c2ae5de0 179 .type \handler_name, %function
mbed_official 614:9d86c2ae5de0 180 \handler_name :
mbed_official 614:9d86c2ae5de0 181 b .
mbed_official 614:9d86c2ae5de0 182 .size \handler_name, . - \handler_name
mbed_official 614:9d86c2ae5de0 183 .endm
mbed_official 614:9d86c2ae5de0 184
mbed_official 614:9d86c2ae5de0 185 def_default_handler NMI_Handler
mbed_official 614:9d86c2ae5de0 186 def_default_handler HardFault_Handler
mbed_official 614:9d86c2ae5de0 187 def_default_handler SVC_Handler
mbed_official 614:9d86c2ae5de0 188 def_default_handler PendSV_Handler
mbed_official 614:9d86c2ae5de0 189 def_default_handler SysTick_Handler
mbed_official 614:9d86c2ae5de0 190 def_default_handler Default_Handler
mbed_official 614:9d86c2ae5de0 191
mbed_official 614:9d86c2ae5de0 192 .macro def_irq_default_handler handler_name
mbed_official 614:9d86c2ae5de0 193 .weak \handler_name
mbed_official 614:9d86c2ae5de0 194 .set \handler_name, Default_Handler
mbed_official 614:9d86c2ae5de0 195 .endm
mbed_official 614:9d86c2ae5de0 196
mbed_official 614:9d86c2ae5de0 197 def_irq_default_handler SPI0_IRQHandler
mbed_official 614:9d86c2ae5de0 198 def_irq_default_handler SPI1_IRQHandler
mbed_official 614:9d86c2ae5de0 199 def_irq_default_handler UART0_IRQHandler
mbed_official 614:9d86c2ae5de0 200 def_irq_default_handler UART1_IRQHandler
mbed_official 614:9d86c2ae5de0 201 def_irq_default_handler UART2_IRQHandler
mbed_official 614:9d86c2ae5de0 202 def_irq_default_handler I2C_IRQHandler
mbed_official 614:9d86c2ae5de0 203 def_irq_default_handler SCT_IRQHandler
mbed_official 614:9d86c2ae5de0 204 def_irq_default_handler MRT_IRQHandler
mbed_official 614:9d86c2ae5de0 205 def_irq_default_handler CMP_IRQHandler
mbed_official 614:9d86c2ae5de0 206 def_irq_default_handler WDT_IRQHandler
mbed_official 614:9d86c2ae5de0 207 def_irq_default_handler BOD_IRQHandler
mbed_official 614:9d86c2ae5de0 208 def_irq_default_handler WKT_IRQHandler
mbed_official 614:9d86c2ae5de0 209 def_irq_default_handler PININT0_IRQHandler
mbed_official 614:9d86c2ae5de0 210 def_irq_default_handler PININT1_IRQHandler
mbed_official 614:9d86c2ae5de0 211 def_irq_default_handler PININT2_IRQHandler
mbed_official 614:9d86c2ae5de0 212 def_irq_default_handler PININT3_IRQHandler
mbed_official 614:9d86c2ae5de0 213 def_irq_default_handler PININT4_IRQHandler
mbed_official 614:9d86c2ae5de0 214 def_irq_default_handler PININT5_IRQHandler
mbed_official 614:9d86c2ae5de0 215 def_irq_default_handler PININT6_IRQHandler
mbed_official 614:9d86c2ae5de0 216 def_irq_default_handler PININT7_IRQHandler
mbed_official 614:9d86c2ae5de0 217
mbed_official 614:9d86c2ae5de0 218 .end
mbed_official 614:9d86c2ae5de0 219