git.sur5r.net Git - u-boot/blob - arch/arm/cpu/armv7/smccc-call.S

   1 /*
   2  * Copyright (c) 2015, Linaro Limited
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0
   5  */
   6 #include <linux/linkage.h>
   7
   8 #include <asm/opcodes-sec.h>
   9 #include <asm/opcodes-virt.h>
  10
  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
  20         .macro SMCCC_HVC
  21         __HVC(0)
  22         .endm
  23
  24         .macro SMCCC instr
  25 UNWIND( .fnstart)
  26         mov     r12, sp
  27         push    {r4-r7}
  28 UNWIND( .save   {r4-r7})
  29         ldm     r12, {r4-r7}
  30         \instr
  31         pop     {r4-r7}
  32         ldr     r12, [sp, #(4 * 4)]
  33         stm     r12, {r0-r3}
  34         bx      lr
  35 UNWIND( .fnend)
  36         .endm
  37
  38 /*
  39  * void smccc_smc(unsigned long a0, unsigned long a1, unsigned long a2,
  40  *                unsigned long a3, unsigned long a4, unsigned long a5,
  41  *                unsigned long a6, unsigned long a7, struct arm_smccc_res *res,
  42  *                struct arm_smccc_quirk *quirk)
  43  */
  44 ENTRY(__arm_smccc_smc)
  45         SMCCC SMCCC_SMC
  46 ENDPROC(__arm_smccc_smc)
  47
  48 /*
  49  * void smccc_hvc(unsigned long a0, unsigned long a1, unsigned long a2,
  50  *                unsigned long a3, unsigned long a4, unsigned long a5,
  51  *                unsigned long a6, unsigned long a7, struct arm_smccc_res *res,
  52  *                struct arm_smccc_quirk *quirk)
  53  */
  54 ENTRY(__arm_smccc_hvc)
  55         SMCCC SMCCC_HVC
  56 ENDPROC(__arm_smccc_hvc)