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android_kernel_...
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arch
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loongarch
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kernel
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genex.S

genex.S 2.0 KB
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  1. /* SPDX-License-Identifier: GPL-2.0 */
    2. 

  2. /*
    3. 

  3.  * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
    4. 

  4.  *
    5. 

  5.  * Derived from MIPS:
    6. 

  6.  * Copyright (C) 1994 - 2000, 2001, 2003 Ralf Baechle
    7. 

  7.  * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
    8. 

  8.  * Copyright (C) 2002, 2007  Maciej W. Rozycki
    9. 

  9.  * Copyright (C) 2001, 2012 MIPS Technologies, Inc.  All rights reserved.
    10. 

  10.  */
    11. 

  11. #include <asm/asm.h>
    12. 

  12. #include <asm/asmmacro.h>
    13. 

  13. #include <asm/loongarch.h>
    14. 

  14. #include <asm/regdef.h>
    15. 

  15. #include <asm/fpregdef.h>
    16. 

  16. #include <asm/stackframe.h>
    17. 

  17. #include <asm/thread_info.h>
    18. 

  18. 

  19. 	.align	5
    20. 

  20. SYM_FUNC_START(__arch_cpu_idle)
    21. 

  21. 	/* start of rollback region */
    22. 

  22. 	LONG_L	t0, tp, TI_FLAGS
    23. 

  23. 	nop
    24. 

  24. 	andi	t0, t0, _TIF_NEED_RESCHED
    25. 

  25. 	bnez	t0, 1f
    26. 

  26. 	nop
    27. 

  27. 	nop
    28. 

  28. 	nop
    29. 

  29. 	idle	0
    30. 

  30. 	/* end of rollback region */
    31. 

  31. 1:	jr	ra
    32. 

  32. SYM_FUNC_END(__arch_cpu_idle)
    33. 

  33. 

  34. SYM_FUNC_START(handle_vint)
    35. 

  35. 	BACKUP_T0T1
    36. 

  36. 	SAVE_ALL
    37. 

  37. 	la.abs	t1, __arch_cpu_idle
    38. 

  38. 	LONG_L	t0, sp, PT_ERA
    39. 

  39. 	/* 32 byte rollback region */
    40. 

  40. 	ori	t0, t0, 0x1f
    41. 

  41. 	xori	t0, t0, 0x1f
    42. 

  42. 	bne	t0, t1, 1f
    43. 

  43. 	LONG_S	t0, sp, PT_ERA
    44. 

  44. 1:	move	a0, sp
    45. 

  45. 	move	a1, sp
    46. 

  46. 	la.abs	t0, do_vint
    47. 

  47. 	jirl	ra, t0, 0
    48. 

  48. 	RESTORE_ALL_AND_RET
    49. 

  49. SYM_FUNC_END(handle_vint)
    50. 

  50. 

  51. SYM_FUNC_START(except_vec_cex)
    52. 

  52. 	b	cache_parity_error
    53. 

  53. SYM_FUNC_END(except_vec_cex)
    54. 

  54. 

  55. 	.macro	build_prep_badv
    56. 

  56. 	csrrd	t0, LOONGARCH_CSR_BADV
    57. 

  57. 	PTR_S	t0, sp, PT_BVADDR
    58. 

  58. 	.endm
    59. 

  59. 

  60. 	.macro	build_prep_fcsr
    61. 

  61. 	movfcsr2gr	a1, fcsr0
    62. 

  62. 	.endm
    63. 

  63. 

  64. 	.macro	build_prep_none
    65. 

  65. 	.endm
    66. 

  66. 

  67. 	.macro	BUILD_HANDLER exception handler prep
    68. 

  68. 	.align	5
    69. 

  69. 	SYM_FUNC_START(handle_\exception)
    70. 

  70. 	BACKUP_T0T1
    71. 

  71. 	SAVE_ALL
    72. 

  72. 	build_prep_\prep
    73. 

  73. 	move	a0, sp
    74. 

  74. 	la.abs	t0, do_\handler
    75. 

  75. 	jirl	ra, t0, 0
    76. 

  76. 	RESTORE_ALL_AND_RET
    77. 

  77. 	SYM_FUNC_END(handle_\exception)
    78. 

  78. 	.endm
    79. 

  79. 

  80. 	BUILD_HANDLER ade ade badv
    81. 

  81. 	BUILD_HANDLER ale ale badv
    82. 

  82. 	BUILD_HANDLER bp bp none
    83. 

  83. 	BUILD_HANDLER fpe fpe fcsr
    84. 

  84. 	BUILD_HANDLER fpu fpu none
    85. 

  85. 	BUILD_HANDLER lsx lsx none
    86. 

  86. 	BUILD_HANDLER lasx lasx none
    87. 

  87. 	BUILD_HANDLER lbt lbt none
    88. 

  88. 	BUILD_HANDLER ri ri none
    89. 

  89. 	BUILD_HANDLER watch watch none
    90. 

  90. 	BUILD_HANDLER reserved reserved none	/* others */
    91. 

  91. 

  92. SYM_FUNC_START(handle_sys)
    93. 

  93. 	la.abs	t0, handle_syscall
    94. 

  94. 	jr	t0
    95. 

  95. SYM_FUNC_END(handle_sys)
    96.