tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_NXP/TARGET_LPC23XX/TOOLCHAIN_GCC_ARM/vector_functions.s

   1 /* .include "vector_defns.h" */
   2
   3
   4
   5 .section .privileged_code, "ax"
   6 .arm
   7
   8
   9 .weak __mbed_fiq
  10 .weak __mbed_undef
  11 .weak __mbed_prefetch_abort
  12 .weak __mbed_data_abort
  13 .weak __mbed_irq
  14 .weak __mbed_swi
  15 .weak __mbed_dcc_irq
  16 .weak __mbed_reset
  17 .global __mbed_init_realmonitor
  18 /*  .global __mbed_init */
  19
  20
  21
  22
  23 __mbed_fiq:
  24         B __mbed_fiq
  25 __mbed_undef:
  26         LDR PC, =0x7fffffa0
  27 __mbed_prefetch_abort:
  28         LDR PC, =0x7fffffb0
  29 __mbed_data_abort:
  30         LDR PC, =0x7fffffc0
  31 __mbed_irq:
  32         MSR CPSR_c, #0x1F|0x80|0x40
  33
  34         STMDB sp!, {r0-r3,r12,lr}
  35
  36         MOV r0, #0xFFFFFF00
  37         LDR r0, [r0]
  38
  39         MOV lr, pc
  40         BX r0
  41
  42         MOV r0, #0xFFFFFF00
  43         STR r0, [r0]
  44
  45         LDMFD sp!,{r0-r3,r12,lr}
  46
  47         MSR CPSR_c, #0x12|0x80|0x40
  48
  49         SUBS pc, lr, #4
  50 __mbed_swi:
  51         STMFD sp!, {a4, r4, ip, lr}
  52
  53         LDR r4, =0x40000040
  54
  55         LDR a4, =0x00940000
  56         LDR PC, =0x7ffff820
  57 __mbed_dcc_irq:
  58         LDMFD sp!,{r0-r3,r12,lr}
  59
  60         MSR CPSR_c, #0x12|0x80|0x40
  61
  62         SUB lr, lr, #4
  63         STMFD sp!, {ip,lr}
  64
  65         LDR LR, =0xfffff000
  66         STR LR, [LR, #0xf00]
  67
  68         LDR PC, =0x7fffffe0
  69 /*
  70  __mbed_reset is called after reset
  71  we setup the stacks and realmonitor, then call Reset_Handler like on M3
  72 */
  73
  74 .section .text, "ax"
  75 .arm
  76 .global Reset_handler
  77 Reset_Handler:
  78         .extern __libc_init_array
  79         .extern  SystemInit
  80         LDR     R0, =SystemInit
  81         MOV     LR, PC
  82         BX      R0
  83
  84         LDR     R0, =__libc_init_array
  85         MOV     LR, PC
  86         BX      R0
  87
  88         LDR     R0, =main
  89         BX      R0
  90
  91 __mbed_reset:
  92         LDR R0, =( __SRAM_segment_end__ )
  93
  94         MSR CPSR_c, #0x1B|0x80|0x40
  95         MOV SP, R0
  96         SUB R0, R0, #0x00000040
  97
  98         MSR CPSR_c, #0x17|0x80|0x40
  99         MOV SP, R0
 100         SUB R0, R0, #0x00000040
 101
 102         MSR CPSR_c, #0x11|0x80|0x40
 103         MOV SP, R0
 104         SUB R0, R0, #0x00000000
 105
 106         MSR CPSR_c, #0x12|0x80|0x40
 107         MOV SP, R0
 108         SUB R0, R0, #0x00000040
 109
 110         MSR CPSR_c, #0x13|0x80|0x40
 111         MOV SP, R0
 112         SUB R0, R0, #0x00000040
 113
 114         MSR CPSR_c, #0x10
 115         MOV SP, R0
 116
 117 /*  Relocate .data section (Copy from ROM to RAM) */
 118         LDR     R1, =__text_end__        /* _etext */
 119         LDR     R2, =__data_start__      /* _data  */
 120         LDR     R3, =__data_end__        /* _edata */
 121         CMP     R2, R3
 122         BEQ     DataIsEmpty
 123 LoopRel:        CMP     R2, R3
 124         LDRLO   R0, [R1], #4
 125         STRLO   R0, [R2], #4
 126         BLO     LoopRel
 127 DataIsEmpty:
 128
 129 /*   Clear .bss section (Zero init) */
 130         MOV     R0, #0
 131         LDR     R1, =__bss_start__
 132         LDR     R2, =__bss_end__
 133         CMP     R1,R2
 134         BEQ     BSSIsEmpty
 135 LoopZI:         CMP     R1, R2
 136         STRLO   R0, [R1], #4
 137         BLO     LoopZI
 138 BSSIsEmpty:
 139
 140
 141 /* Init realmonitor */
 142         LDR R0, =__mbed_init_realmonitor
 143         MOV LR, PC
 144         BX R0
 145
 146 /* Go to Reset_Handler */
 147         LDR     R0, =Reset_Handler
 148         BX R0