arch/arm64/kernel/smccc-call.S

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