arch/arm/cpu/armv8/smccc-call.S

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * Copyright (c) 2015, Linaro Limited
   4  */
   5 #include <linux/linkage.h>
   6 #include <linux/arm-smccc.h>
   7 #include <generated/asm-offsets.h>
   8
   9 #ifdef CONFIG_EFI_LOADER
  10         .section        .text.efi_runtime
  11 #endif
  12
  13         .macro SMCCC instr
  14         .cfi_startproc
  15         \instr  #0
  16         ldr     x4, [sp]
  17         stp     x0, x1, [x4, #ARM_SMCCC_RES_X0_OFFS]
  18         stp     x2, x3, [x4, #ARM_SMCCC_RES_X2_OFFS]
  19         ldr     x4, [sp, #8]
  20         cbz     x4, 1f /* no quirk structure */
  21         ldr     x9, [x4, #ARM_SMCCC_QUIRK_ID_OFFS]
  22         cmp     x9, #ARM_SMCCC_QUIRK_QCOM_A6
  23         b.ne    1f
  24         str     x6, [x4, ARM_SMCCC_QUIRK_STATE_OFFS]
  25 1:      ret
  26         .cfi_endproc
  27         .endm
  28
  29 /*
  30  * void arm_smccc_smc(unsigned long a0, unsigned long a1, unsigned long a2,
  31  *                unsigned long a3, unsigned long a4, unsigned long a5,
  32  *                unsigned long a6, unsigned long a7, struct arm_smccc_res *res,
  33  *                struct arm_smccc_quirk *quirk)
  34  */
  35 ENTRY(__arm_smccc_smc)
  36         SMCCC   smc
  37 ENDPROC(__arm_smccc_smc)
  38
  39 /*
  40  * void arm_smccc_hvc(unsigned long a0, unsigned long a1, unsigned long a2,
  41  *                unsigned long a3, unsigned long a4, unsigned long a5,
  42  *                unsigned long a6, unsigned long a7, struct arm_smccc_res *res,
  43  *                struct arm_smccc_quirk *quirk)
  44  */
  45 ENTRY(__arm_smccc_hvc)
  46         SMCCC   hvc
  47 ENDPROC(__arm_smccc_hvc)