[mirror_edk2.git] / ArmPkg / Library / ArmHvcLib / AArch64 / ArmHvc.S

//\r
//  Copyright (c) 2012-2014, ARM Limited. All rights reserved.\r
//  Copyright (c) 2014-2016, Linaro Limited. All rights reserved.\r
//\r
//  SPDX-License-Identifier: BSD-2-Clause-Patent\r
//\r
//\r
\r
#include <AsmMacroIoLibV8.h>\r
\r
ASM_FUNC(ArmCallHvc)\r
  // Push x0 on the stack - The stack must always be quad-word aligned\r
  str   x0, [sp, #-16]!\r
\r
  // Load the HVC 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
  hvc   #0\r
\r
  // Pop the ARM_HVC_ARGS structure address from the stack into x9\r
  ldr   x9, [sp], #16\r
\r
  // Store the HVC returned values into the ARM_HVC_ARGS structure.\r
  // A HVC call can return up to 4 values\r
  stp   x2, x3, [x9, #16]\r
  stp   x0, x1, [x9, #0]\r
\r
  mov   x0, x9\r
\r
  ret\r
Commit	Line	Data
58e92b39 AB	1	//\r
58e92b39 AB	2	// Copyright (c) 2012-2014, ARM Limited. All rights reserved.\r
de656e66	3	// Copyright (c) 2014-2016, Linaro Limited. All rights reserved.\r
58e92b39	4	//\r
4059386c	5	// SPDX-License-Identifier: BSD-2-Clause-Patent\r
58e92b39 AB	6	//\r
	7	//\r
	8	\r
de656e66	9	#include <AsmMacroIoLibV8.h>\r
58e92b39	10	\r
de656e66	11	ASM_FUNC(ArmCallHvc)\r
fb7ea611 OM	12	// Push x0 on the stack - The stack must always be quad-word aligned\r
fb7ea611 OM	13	str x0, [sp, #-16]!\r
58e92b39 AB	14	\r
	15	// Load the HVC arguments values into the appropriate registers\r
	16	ldp x6, x7, [x0, #48]\r
	17	ldp x4, x5, [x0, #32]\r
	18	ldp x2, x3, [x0, #16]\r
	19	ldp x0, x1, [x0, #0]\r
	20	\r
	21	hvc #0\r
	22	\r
	23	// Pop the ARM_HVC_ARGS structure address from the stack into x9\r
fb7ea611	24	ldr x9, [sp], #16\r
58e92b39	25	\r
fb7ea611	26	// Store the HVC returned values into the ARM_HVC_ARGS structure.\r
58e92b39 AB	27	// A HVC call can return up to 4 values\r
	28	stp x2, x3, [x9, #16]\r
	29	stp x0, x1, [x9, #0]\r
	30	\r
	31	mov x0, x9\r
	32	\r
	33	ret\r