Página inicial Explorar Ajuda
Entrar
lqb
/
rt-thread
mirror de https://gitee.com/rtthread/rt-thread.git
1
0
Fork 0
Arquivos Issues 0 Wiki
Branch: rt-smart
Branches Tags
rt-thread
/
bsp
/
thead-smart
/
drivers
/
startup_gcc.S

startup_gcc.S 2.9 KB
Link permanente Histórico Raw

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132 
  1. /*
    2. 

  2.  * Copyright (C) 2017-2019 Alibaba Group Holding Limited
    3. 

  3.  *
    4. 

  4.  * SPDX-License-Identifier: Apache-2.0
    5. 

  5.  *
    6. 

  6.  * Change Logs:
    7. 

  7.  * Date           Author       Notes
    8. 

  8.  * 2020-08-20     zx.chen      startup file. Should use with
    9. 

  9.  *          		       GCC for T-HEAD Embedded Processors
    10. 

  10.  */
    11. 

  11. 

  12. #include <csi_config.h>
    13. 

  13. 

  14. 

  15. .section .vectors, "aw", @progbits
    16. 

  16.     .align  6
    17. 

  17.     .globl  __Vectors
    18. 

  18.     .type   __Vectors, @object
    19. 

  19. __Vectors:
    20. 

  20.     .long   Default_Handler
    21. 

  21.     .long   Default_Handler
    22. 

  22.     .long   Default_Handler
    23. 

  23.     .long   PendSV_Handler
    24. 

  24.     .long   Default_Handler
    25. 

  25.     .long   Default_Handler
    26. 

  26.     .long   Default_Handler
    27. 

  27.     .long   Default_IRQHandler
    28. 

  28.     .long   Default_Handler
    29. 

  29.     .long   Default_Handler
    30. 

  30.     .long   Default_Handler
    31. 

  31.     .long   Default_Handler
    32. 

  32.     .long   Default_Handler
    33. 

  33.     .long   Default_Handler
    34. 

  34.     .long   Default_Handler
    35. 

  35.     .long   Default_Handler
    36. 

  36. 

  37.     /* External interrupts */
    38. 

  38.     .long   Default_IRQHandler
    39. 

  39.     .long   Default_IRQHandler
    40. 

  40.     .long   Default_IRQHandler
    41. 

  41.     .long   Default_IRQHandler
    42. 

  42.     .long   Default_IRQHandler
    43. 

  43.     .long   Default_IRQHandler
    44. 

  44.     .long   Default_IRQHandler
    45. 

  45.     .long   Default_IRQHandler
    46. 

  46.     .long   Default_IRQHandler
    47. 

  47.     .long   Default_IRQHandler
    48. 

  48.     .long   Default_IRQHandler
    49. 

  49.     .long   Default_IRQHandler
    50. 

  50.     .long   Default_IRQHandler
    51. 

  51.     .long   Default_IRQHandler
    52. 

  52.     .long   Default_IRQHandler
    53. 

  53.     .long   Default_IRQHandler
    54. 

  54.     .long   Default_IRQHandler
    55. 

  55.     .long   Default_IRQHandler
    56. 

  56.     .long   Default_IRQHandler
    57. 

  57.     .long   Default_IRQHandler
    58. 

  58.     .long   Default_IRQHandler
    59. 

  59.     .long   Default_IRQHandler
    60. 

  60.     .long   Default_IRQHandler
    61. 

  61.     .long   Default_IRQHandler
    62. 

  62.     .long   Default_IRQHandler
    63. 

  63.     .long   Default_IRQHandler
    64. 

  64.     .long   Default_IRQHandler
    65. 

  65.     .long   Default_IRQHandler
    66. 

  66.     .long   Default_IRQHandler
    67. 

  67.     .long   Default_IRQHandler
    68. 

  68.     .long   Default_IRQHandler
    69. 

  69.     .long   Default_IRQHandler
    70. 

  70. 

  71.     .text
    72. 

  72.     .align  2
    73. 

  73. _start:
    74. 

  74.     .text
    75. 

  75.     .align  2
    76. 

  76.     .globl  Reset_Handler
    77. 

  77.     .type   Reset_Handler, %function
    78. 

  78. Reset_Handler:
    79. 

  79. .option push
    80. 

  80. .option norelax
    81. 

  81.     la      gp, __global_pointer$
    82. 

  82. .option pop
    83. 

  83.     la      a0, Default_Handler
    84. 

  84.     ori     a0, a0, 3
    85. 

  85.     csrw    mtvec, a0
    86. 

  86.     la      a0, __Vectors
    87. 

  87.     csrw    mtvt, a0
    88. 

  88.     la      sp, __StackTop
    89. 

  89.     csrw    mscratch, sp
    90. 

  90. 

  91.     /* Load data section */
    92. 

  92.     la      a0, __erodata
    93. 

  93.     la      a1, __data_start__
    94. 

  94.     la      a2, __data_end__
    95. 

  95.     bgeu    a1, a2, 2f
    96. 

  96. 1:
    97. 

  97.     lw      t0, (a0)
    98. 

  98.     sw      t0, (a1)
    99. 

  99.     addi    a0, a0, 4
    100. 

  100.     addi    a1, a1, 4
    101. 

  101.     bltu    a1, a2, 1b
    102. 

  102. 2:
    103. 

  103. 

  104.     /* Clear bss section */
    105. 

  105.     la      a0, __bss_start__
    106. 

  106.     la      a1, __bss_end__
    107. 

  107.     bgeu    a0, a1, 2f
    108. 

  108. 1:
    109. 

  109.     sw      zero, (a0)
    110. 

  110.     addi    a0, a0, 4
    111. 

  111.     bltu    a0, a1, 1b
    112. 

  112. 2:
    113. 

  113. 

  114. #ifndef __NO_SYSTEM_INIT
    115. 

  115.     jal     SystemInit
    116. 

  116. #endif
    117. 

  117. 

  118.     jal     entry
    119. 

  119. 

  120.     .size   Reset_Handler, . - Reset_Handler
    121. 

  121. 

  122. __exit:
    123. 

  123.     j      __exit
    124. 

  124. 

  125. .section .bss
    126. 

  126. 

  127.     .align  3
    128. 

  128.     .global g_base_irqstack
    129. 

  129.     .global g_top_irqstack
    130. 

  130. g_base_irqstack:
    131. 

  131.     .space CONFIG_ARCH_INTERRUPTSTACK
    132. 

  132. g_top_irqstack:
    133.