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arm
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smccc-call.S

smccc-call.S 1.6 KB
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  1. /*
    2. 

  2.  * Copyright (c) 2015, Linaro Limited
    3. 

  3.  *
    4. 

  4.  * This software is licensed under the terms of the GNU General Public
    5. 

  5.  * License version 2, as published by the Free Software Foundation, and
    6. 

  6.  * may be copied, distributed, and modified under those terms.
    7. 

  7.  *
    8. 

  8.  * This program is distributed in the hope that it will be useful,
    9. 

  9.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    10. 

  10.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    11. 

  11.  * GNU General Public License for more details.
    12. 

  12.  *
    13. 

  13.  */
    14. 

  14. #include <linux/linkage.h>
    15. 

  15. 

  16. #include <asm/opcodes-sec.h>
    17. 

  17. #include <asm/opcodes-virt.h>
    18. 

  18. #include <asm/unwind.h>
    19. 

  19. 

  20. 	/*
    21. 

  21. 	 * Wrap c macros in asm macros to delay expansion until after the
    22. 

  22. 	 * SMCCC asm macro is expanded.
    23. 

  23. 	 */
    24. 

  24. 	.macro SMCCC_SMC
    25. 

  25. 	__SMC(0)
    26. 

  26. 	.endm
    27. 

  27. 

  28. 	.macro SMCCC_HVC
    29. 

  29. 	__HVC(0)
    30. 

  30. 	.endm
    31. 

  31. 

  32. 	.macro SMCCC instr
    33. 

  33. UNWIND(	.fnstart)
    34. 

  34. 	mov	r12, sp
    35. 

  35. 	push	{r4-r7}
    36. 

  36. UNWIND(	.save	{r4-r7})
    37. 

  37. 	ldm	r12, {r4-r7}
    38. 

  38. 	\instr
    39. 

  39. 	pop	{r4-r7}
    40. 

  40. 	ldr	r12, [sp, #(4 * 4)]
    41. 

  41. 	stm	r12, {r0-r3}
    42. 

  42. 	bx	lr
    43. 

  43. UNWIND(	.fnend)
    44. 

  44. 	.endm
    45. 

  45. 

  46. /*
    47. 

  47.  * void smccc_smc(unsigned long a0, unsigned long a1, unsigned long a2,
    48. 

  48.  *		  unsigned long a3, unsigned long a4, unsigned long a5,
    49. 

  49.  *		  unsigned long a6, unsigned long a7, struct arm_smccc_res *res,
    50. 

  50.  *		  struct arm_smccc_quirk *quirk)
    51. 

  51.  */
    52. 

  52. ENTRY(__arm_smccc_smc)
    53. 

  53. 	SMCCC SMCCC_SMC
    54. 

  54. ENDPROC(__arm_smccc_smc)
    55. 

  55. 

  56. /*
    57. 

  57.  * void smccc_hvc(unsigned long a0, unsigned long a1, unsigned long a2,
    58. 

  58.  *		  unsigned long a3, unsigned long a4, unsigned long a5,
    59. 

  59.  *		  unsigned long a6, unsigned long a7, struct arm_smccc_res *res,
    60. 

  60.  *		  struct arm_smccc_quirk *quirk)
    61. 

  61.  */
    62. 

  62. ENTRY(__arm_smccc_hvc)
    63. 

  63. 	SMCCC SMCCC_HVC
    64. 

  64. ENDPROC(__arm_smccc_hvc)
    65. 

  65.