/** @file
|
*
|
* Copyright (c) 2013-2014, ARM Limited. All rights reserved.
|
* Copyright (c) 2017, Linaro Limited. All rights reserved.
|
*
|
* SPDX-License-Identifier: BSD-2-Clause-Patent
|
*
|
*/
|
|
#include <AsmMacroIoLibV8.h>
|
#include <Library/ArmLib.h>
|
|
.text
|
.align 3
|
|
GCC_ASM_EXPORT(ArmPlatformPeiBootAction)
|
GCC_ASM_EXPORT(ArmPlatformGetCorePosition)
|
GCC_ASM_EXPORT(ArmPlatformGetPrimaryCoreMpId)
|
GCC_ASM_EXPORT(ArmPlatformIsPrimaryCore)
|
|
//
|
// First platform specific function to be called in the PEI phase
|
//
|
// This function is actually the first function called by the PrePi
|
// or PrePeiCore modules. It allows to retrieve arguments passed to
|
// the UEFI firmware through the CPU registers.
|
//
|
ASM_PFX(ArmPlatformPeiBootAction):
|
bx lr
|
|
//
|
// Return the core position from the value of its MpId register
|
//
|
// This function returns the core position from the position 0 in the processor.
|
// This function might be called from assembler before any stack is set.
|
//
|
// @return Return the core position
|
//
|
//UINTN
|
//ArmPlatformGetCorePosition (
|
// IN UINTN MpId
|
// );
|
// With this function: CorePos = (ClusterId * 2) + CoreId
|
ASM_PFX(ArmPlatformGetCorePosition):
|
and r1, r0, #ARM_CORE_MASK
|
and r0, r0, #ARM_CLUSTER_MASK
|
add r0, r1, r0, LSR #7
|
bx lr
|
|
//
|
// Return the MpId of the primary core
|
//
|
// This function returns the MpId of the primary core.
|
// This function might be called from assembler before any stack is set.
|
//
|
// @return Return the MpId of the primary core
|
//
|
//UINTN
|
//ArmPlatformGetPrimaryCoreMpId (
|
// VOID
|
// );
|
ASM_PFX(ArmPlatformGetPrimaryCoreMpId):
|
ldr r0, =FixedPcdGet32 (PcdArmPrimaryCore)
|
bx lr
|
|
//
|
// Return a non-zero value if the callee is the primary core
|
//
|
// This function returns a non-zero value if the callee is the primary core.
|
// The primary core is the core responsible to initialize the hardware and run UEFI.
|
// This function might be called from assembler before any stack is set.
|
//
|
// @return Return a non-zero value if the callee is the primary core.
|
//
|
//UINTN
|
//ArmPlatformIsPrimaryCore (
|
// IN UINTN MpId
|
// );
|
ASM_PFX(ArmPlatformIsPrimaryCore):
|
mov r0, #1
|
bx lr
|
