arch/arm64/kernel/smccc-call.S

   1 /*
   2  * Copyright (c) 2015, Linaro Limited
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License Version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  11  * GNU General Public License for more details.
  12  *
  13  */
  14 #include <linux/linkage.h>
  15 #include <asm/asm-offsets.h>
  16
  17         .macro SMCCC instr
  18         .cfi_startproc
  19         \instr  #0
  20         ldr     x4, [sp]
  21         stp     x0, x1, [x4, #ARM_SMCCC_RES_X0_OFFS]
  22         stp     x2, x3, [x4, #ARM_SMCCC_RES_X2_OFFS]
  23         ret
  24         .cfi_endproc
  25         .endm
  26
  27 /*
  28  * void arm_smccc_smc(unsigned long a0, unsigned long a1, unsigned long a2,
  29  *                unsigned long a3, unsigned long a4, unsigned long a5,
  30  *                unsigned long a6, unsigned long a7, struct arm_smccc_res *res)
  31  */
  32 ENTRY(arm_smccc_smc)
  33         SMCCC   smc
  34 ENDPROC(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  */
  41 ENTRY(arm_smccc_hvc)
  42         SMCCC   hvc
  43 ENDPROC(arm_smccc_hvc)