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/** @file
*
* Copyright (c) 2011, 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 <Library/ArmGicLib.h>
#include <Library/ArmMPCoreMailBoxLib.h>
#include <Chipset/ArmV7.h>
#include "PrePeiCore.h"
/*
* This is the main function for secondary cores. They loop around until a non Null value is written to
* SYS_FLAGS register.The SYS_FLAGS register is platform specific.
* Note:The secondary cores, while executing secondary_main, assumes that:
* : SGI 0 is configured as Non-secure interrupt
* : Priority Mask is configured to allow SGI 0
* : Interrupt Distributor and CPU interfaces are enabled
*
*/
VOID
EFIAPI
SecondaryMain (
IN UINTN MpId
)
{
// Function pointer to Secondary Core entry point
VOID (*secondary_start)(VOID);
UINTN secondary_entry_addr=0;
// Clear Secondary cores MailBox
ArmClearMPCoreMailbox();
while (secondary_entry_addr = ArmGetMPCoreMailbox(), secondary_entry_addr == 0) {
ArmCallWFI();
// Acknowledge the interrupt and send End of Interrupt signal.
ArmGicAcknowledgeSgiFrom (PcdGet32(PcdGicInterruptInterfaceBase), PRIMARY_CORE_ID);
}
secondary_start = (VOID (*)())secondary_entry_addr;
// Jump to secondary core entry point.
secondary_start();
// The secondaries shouldn't reach here
ASSERT(FALSE);
}
VOID
EFIAPI
PrimaryMain (
IN EFI_PEI_CORE_ENTRY_POINT PeiCoreEntryPoint
)
{
EFI_SEC_PEI_HAND_OFF SecCoreData;
// Enable the GIC Distributor
ArmGicEnableDistributor(PcdGet32(PcdGicDistributorBase));
// If ArmVe has not been built as Standalone then we need to wake up the secondary cores
if (FeaturePcdGet (PcdSendSgiToBringUpSecondaryCores)) {
// Sending SGI to all the Secondary CPU interfaces
ArmGicSendSgiTo (PcdGet32(PcdGicDistributorBase), ARM_GIC_ICDSGIR_FILTER_EVERYONEELSE, 0x0E);
}
//
// Bind this information into the SEC hand-off state
// Note: this must be in sync with the stuff in the asm file
// Note also: HOBs (pei temp ram) MUST be above stack
//
SecCoreData.DataSize = sizeof(EFI_SEC_PEI_HAND_OFF);
SecCoreData.BootFirmwareVolumeBase = (VOID *)(UINTN)PcdGet32 (PcdFvBaseAddress);
SecCoreData.BootFirmwareVolumeSize = PcdGet32 (PcdFvSize);
SecCoreData.TemporaryRamBase = (VOID *)(UINTN)PcdGet32 (PcdCPUCorePrimaryStackSize); // We consider we run on the primary core (and so we use the first stack)
SecCoreData.TemporaryRamSize = (UINTN)(UINTN)PcdGet32 (PcdCPUCorePrimaryStackSize);
SecCoreData.PeiTemporaryRamBase = (VOID *)((UINTN)(SecCoreData.TemporaryRamBase) + (SecCoreData.TemporaryRamSize / 2));
SecCoreData.PeiTemporaryRamSize = SecCoreData.TemporaryRamSize / 2;
SecCoreData.StackBase = (VOID *)((UINTN)(SecCoreData.TemporaryRamBase) + (SecCoreData.TemporaryRamSize/2));
SecCoreData.StackSize = SecCoreData.TemporaryRamSize / 2;
// Jump to PEI core entry point
(PeiCoreEntryPoint)(&SecCoreData, (VOID *)&gSecPpiTable);
}
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