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//
// Copyright (c) 2012-2013, ARM Limited. All rights reserved.
//
// This program and the accompanying materials
// are licensed and made available under the terms and conditions of the BSD License
// which accompanies this distribution. The full text of the license may be found at
// http://opensource.org/licenses/bsd-license.php
//
// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
//
//
#include <AsmMacroIoLib.h>
#include <Library/ArmLib.h>
#include <ArmPlatform.h>
.text
.align 3
GCC_ASM_EXPORT(ArmPlatformGetCorePosition)
GCC_ASM_EXPORT(ArmPlatformIsPrimaryCore)
//UINTN
//ArmPlatformGetCorePosition (
// IN UINTN MpId
// );
ASM_PFX(ArmPlatformGetCorePosition):
and r1, r0, #ARM_CORE_MASK
and r0, r0, #ARM_CLUSTER_MASK
add r0, r1, r0, LSR #7
bx lr
//UINTN
//ArmPlatformIsPrimaryCore (
// IN UINTN MpId
// );
ASM_PFX(ArmPlatformIsPrimaryCore):
// Extract cpu_id and cluster_id from ARM_SCC_CFGREG48
// with cpu_id[0:3] and cluster_id[4:7]
LoadConstantToReg (ARM_CTA15A7_SCC_CFGREG48, r1)
ldr r1, [r1]
lsr r1, #24
// Shift the SCC value to get the cluster ID at the offset #8
lsl r2, r1, #4
and r2, r2, #0xF00
// Keep only the cpu ID from the original SCC
and r1, r1, #0x0F
// Add the Cluster ID to the Cpu ID
orr r1, r1, r2
// Keep the Cluster ID and Core ID from the MPID
LoadConstantToReg (ARM_CLUSTER_MASK | ARM_CORE_MASK, r2)
and r0, r0, r2
// Compare mpid and boot cpu from ARM_SCC_CFGREG48
cmp r0, r1
moveq r0, #1
movne r0, #0
bx lr
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