[mirror_edk2.git] / ArmPkg / Library / ArmSmcLib / AArch64 / ArmSmc.S

//\r
//  Copyright (c) 2012-2014, ARM Limited. All rights reserved.\r
//\r
//  SPDX-License-Identifier: BSD-2-Clause-Patent\r
//\r
//\r
\r
#include <AsmMacroIoLibV8.h>\r
\r
ASM_FUNC(ArmCallSmc)\r
  // Push x0 on the stack - The stack must always be quad-word aligned\r
  str   x0, [sp, #-16]!\r
\r
  // Load the SMC arguments values into the appropriate registers\r
  ldp   x6, x7, [x0, #48]\r
  ldp   x4, x5, [x0, #32]\r
  ldp   x2, x3, [x0, #16]\r
  ldp   x0, x1, [x0, #0]\r
\r
  smc   #0\r
\r
  // Pop the ARM_SMC_ARGS structure address from the stack into x9\r
  ldr   x9, [sp], #16\r
\r
  // Store the SMC returned values into the ARM_SMC_ARGS structure.\r
  // A SMC call can return up to 4 values - we do not need to store back x4-x7.\r
  stp   x2, x3, [x9, #16]\r
  stp   x0, x1, [x9, #0]\r
\r
  mov   x0, x9\r
\r
  ret\r
Commit	Line	Data
25402f5d	1	//\r
b4e53e38	2	// Copyright (c) 2012-2014, ARM Limited. All rights reserved.\r
25402f5d	3	//\r
4059386c	4	// SPDX-License-Identifier: BSD-2-Clause-Patent\r
25402f5d HL	5	//\r
	6	//\r
	7	\r
86a4d91b	8	#include <AsmMacroIoLibV8.h>\r
25402f5d	9	\r
86a4d91b	10	ASM_FUNC(ArmCallSmc)\r
fb7ea611 OM	11	// Push x0 on the stack - The stack must always be quad-word aligned\r
fb7ea611 OM	12	str x0, [sp, #-16]!\r
25402f5d	13	\r
b4e53e38 OM	14	// Load the SMC arguments values into the appropriate registers\r
	15	ldp x6, x7, [x0, #48]\r
	16	ldp x4, x5, [x0, #32]\r
	17	ldp x2, x3, [x0, #16]\r
	18	ldp x0, x1, [x0, #0]\r
25402f5d	19	\r
25402f5d	20	smc #0\r
25402f5d	21	\r
b4e53e38	22	// Pop the ARM_SMC_ARGS structure address from the stack into x9\r
fb7ea611	23	ldr x9, [sp], #16\r
b4e53e38	24	\r
fb7ea611	25	// Store the SMC returned values into the ARM_SMC_ARGS structure.\r
b4e53e38 OM	26	// A SMC call can return up to 4 values - we do not need to store back x4-x7.\r
	27	stp x2, x3, [x9, #16]\r
	28	stp x0, x1, [x9, #0]\r
	29	\r
	30	mov x0, x9\r
	31	\r
25402f5d	32	ret\r