smccc-call.S 1.2 KB

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859
  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. /*
  3. * Copyright (c) 2015, Linaro Limited
  4. */
  5. #include <linux/linkage.h>
  6. #include <asm/opcodes-sec.h>
  7. #include <asm/opcodes-virt.h>
  8. #ifdef CONFIG_EFI_LOADER
  9. .section .text.efi_runtime
  10. #endif
  11. #define UNWIND(x...)
  12. /*
  13. * Wrap c macros in asm macros to delay expansion until after the
  14. * SMCCC asm macro is expanded.
  15. */
  16. .macro SMCCC_SMC
  17. __SMC(0)
  18. .endm
  19. .macro SMCCC_HVC
  20. __HVC(0)
  21. .endm
  22. .macro SMCCC instr
  23. UNWIND( .fnstart)
  24. mov r12, sp
  25. push {r4-r7}
  26. UNWIND( .save {r4-r7})
  27. ldm r12, {r4-r7}
  28. \instr
  29. pop {r4-r7}
  30. ldr r12, [sp, #(4 * 4)]
  31. stm r12, {r0-r3}
  32. bx lr
  33. UNWIND( .fnend)
  34. .endm
  35. /*
  36. * void smccc_smc(unsigned long a0, unsigned long a1, unsigned long a2,
  37. * unsigned long a3, unsigned long a4, unsigned long a5,
  38. * unsigned long a6, unsigned long a7, struct arm_smccc_res *res,
  39. * struct arm_smccc_quirk *quirk)
  40. */
  41. ENTRY(__arm_smccc_smc)
  42. SMCCC SMCCC_SMC
  43. ENDPROC(__arm_smccc_smc)
  44. /*
  45. * void smccc_hvc(unsigned long a0, unsigned long a1, unsigned long a2,
  46. * unsigned long a3, unsigned long a4, unsigned long a5,
  47. * unsigned long a6, unsigned long a7, struct arm_smccc_res *res,
  48. * struct arm_smccc_quirk *quirk)
  49. */
  50. ENTRY(__arm_smccc_hvc)
  51. SMCCC SMCCC_HVC
  52. ENDPROC(__arm_smccc_hvc)