/** @file
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*
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* Copyright (c) 2013-2014, ARM Limited. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-2-Clause-Patent
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*
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**/
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#include <AsmMacroIoLib.h>
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#include <Library/ArmLib.h>
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//
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// Return the core position from the value of its MpId register
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//
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// This function returns the core position from the position 0 in the processor.
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// This function might be called from assembler before any stack is set.
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//
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// @return Return the core position
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//
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//UINTN
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//ArmPlatformGetCorePosition (
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// IN UINTN MpId
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// );
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// With this function: CorePos = (ClusterId * 2) + CoreId
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ASM_FUNC(ArmPlatformGetCorePosition)
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and r1, r0, #ARM_CORE_MASK
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and r0, r0, #ARM_CLUSTER_MASK
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add r0, r1, r0, LSR #7
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bx lr
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//
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// Return the MpId of the primary core
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//
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// This function returns the MpId of the primary core.
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// This function might be called from assembler before any stack is set.
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//
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// @return Return the MpId of the primary core
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//
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//UINTN
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//ArmPlatformGetPrimaryCoreMpId (
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// VOID
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// );
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ASM_FUNC(ArmPlatformGetPrimaryCoreMpId)
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LDRL (r0, PrimaryCoreMpid)
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bx lr
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//
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// Return a non-zero value if the callee is the primary core
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//
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// This function returns a non-zero value if the callee is the primary core.
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// The primary core is the core responsible to initialize the hardware and run UEFI.
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// This function might be called from assembler before any stack is set.
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//
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// @return Return a non-zero value if the callee is the primary core.
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//
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//UINTN
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//ArmPlatformIsPrimaryCore (
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// IN UINTN MpId
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// );
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ASM_FUNC(ArmPlatformIsPrimaryCore)
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MOV32 (r1, FixedPcdGet32 (PcdArmPrimaryCoreMask))
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and r0, r0, r1
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LDRL (r1, PrimaryCoreMpid)
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cmp r0, r1
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moveq r0, #1
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movne r0, #0
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bx lr
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//
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// First platform specific function to be called in the PEI phase
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//
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// This function is actually the first function called by the PrePi
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// or PrePeiCore modules. It allows to retrieve arguments passed to
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// the UEFI firmware through the CPU registers.
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//
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ASM_FUNC(ArmPlatformPeiBootAction)
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// The trusted firmware passes the primary CPU MPID through r0 register.
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// Save it in a variable.
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adr r1, PrimaryCoreMpid
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str r0, [r1]
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bx lr
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PrimaryCoreMpid: .word 0x0
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