ArmPlatformPkg/PrePeiCore: switch to ASM_FUNC() asm macro

[mirror_edk2.git] / ArmPlatformPkg / PrePeiCore / Arm / PrePeiCoreEntryPoint.S

//\r
//  Copyright (c) 2011-2013, ARM Limited. All rights reserved.\r
//\r
//  This program and the accompanying materials\r
//  are licensed and made available under the terms and conditions of the BSD License\r
//  which accompanies this distribution.  The full text of the license may be found at\r
//  http://opensource.org/licenses/bsd-license.php\r
//\r
//  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
//  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
//\r
//\r
\r
#include <AsmMacroIoLib.h>\r
\r
ASM_FUNC(_ModuleEntryPoint)\r
  // Do early platform specific actions\r
  bl    ASM_PFX(ArmPlatformPeiBootAction)\r
\r
  // Identify CPU ID\r
  bl    ASM_PFX(ArmReadMpidr)\r
  // Keep a copy of the MpId register value\r
  mov   r5, r0\r
\r
  // Is it the Primary Core ?\r
  bl    ASM_PFX(ArmPlatformIsPrimaryCore)\r
\r
  // Get the top of the primary stacks (and the base of the secondary stacks)\r
  MOV32 (r1, FixedPcdGet64(PcdCPUCoresStackBase) + FixedPcdGet32(PcdCPUCorePrimaryStackSize))\r
\r
  // r0 is equal to 1 if I am the primary core\r
  cmp   r0, #1\r
  beq   _SetupPrimaryCoreStack\r
\r
_SetupSecondaryCoreStack:\r
  // r1 contains the base of the secondary stacks\r
\r
  // Get the Core Position\r
  mov   r6, r1      // Save base of the secondary stacks\r
  mov   r0, r5\r
  bl    ASM_PFX(ArmPlatformGetCorePosition)\r
  // The stack starts at the top of the stack region. Add '1' to the Core Position to get the top of the stack\r
  add   r0, r0, #1\r
\r
  // StackOffset = CorePos * StackSize\r
  MOV32 (r2, FixedPcdGet32(PcdCPUCoreSecondaryStackSize))\r
  mul   r0, r0, r2\r
  // SP = StackBase + StackOffset\r
  add   sp, r6, r0\r
\r
_PrepareArguments:\r
  // The PEI Core Entry Point has been computed by GenFV and stored in the second entry of the Reset Vector\r
  MOV32 (r2, FixedPcdGet32(PcdFvBaseAddress))\r
  ldr   r1, [r2, #4]\r
\r
  // Move sec startup address into a data register\r
  // Ensure we're jumping to FV version of the code (not boot remapped alias)\r
  ldr   r3, =ASM_PFX(CEntryPoint)\r
\r
  // Jump to PrePeiCore C code\r
  //    r0 = mp_id\r
  //    r1 = pei_core_address\r
  mov   r0, r5\r
  blx   r3\r
\r
_SetupPrimaryCoreStack:\r
  mov   sp, r1\r
  b     _PrepareArguments\r
\r
_NeverReturn:\r
  b _NeverReturn\r