3 * Copyright (c) 2011, ARM Limited. All rights reserved.
5 * This program and the accompanying materials
6 * are licensed and made available under the terms and conditions of the BSD License
7 * which accompanies this distribution. The full text of the license may be found at
8 * http://opensource.org/licenses/bsd-license.php
10 * THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
16 #include <Library/DebugLib.h>
17 #include <Library/PcdLib.h>
18 #include <Library/ArmMPCoreMailBoxLib.h>
19 #include <Chipset/ArmV7.h>
20 #include <Drivers/PL390Gic.h>
22 extern EFI_PEI_PPI_DESCRIPTOR
*gSecPpiTable
;
25 * This is the main function for secondary cores. They loop around until a non Null value is written to
26 * SYS_FLAGS register.The SYS_FLAGS register is platform specific.
27 * Note:The secondary cores, while executing secondary_main, assumes that:
28 * : SGI 0 is configured as Non-secure interrupt
29 * : Priority Mask is configured to allow SGI 0
30 * : Interrupt Distributor and CPU interfaces are enabled
35 secondary_main(IN UINTN CoreId
)
37 //Function pointer to Secondary Core entry point
38 VOID (*secondary_start
)(VOID
);
39 UINTN secondary_entry_addr
=0;
41 //Clear Secondary cores MailBox
42 ArmClearMPCoreMailbox();
44 while (secondary_entry_addr
= ArmGetMPCoreMailbox(), secondary_entry_addr
== 0) {
46 //Acknowledge the interrupt and send End of Interrupt signal.
47 PL390GicAcknowledgeSgiFrom(PcdGet32(PcdGicInterruptInterfaceBase
),0/*CoreId*/);
50 secondary_start
= (VOID (*)())secondary_entry_addr
;
52 //Jump to secondary core entry point.
55 //the secondaries shouldn't reach here
60 IN EFI_PEI_CORE_ENTRY_POINT PeiCoreEntryPoint
63 EFI_SEC_PEI_HAND_OFF SecCoreData
;
65 //Enable the GIC Distributor
66 PL390GicEnableDistributor(PcdGet32(PcdGicDistributorBase
));
68 // If ArmVe has not been built as Standalone then we need to wake up the secondary cores
69 if (FeaturePcdGet(PcdStandalone
) == FALSE
) {
70 // Sending SGI to all the Secondary CPU interfaces
71 PL390GicSendSgiTo (PcdGet32(PcdGicDistributorBase
), GIC_ICDSGIR_FILTER_EVERYONEELSE
, 0x0E);
75 // Bind this information into the SEC hand-off state
76 // Note: this must be in sync with the stuff in the asm file
77 // Note also: HOBs (pei temp ram) MUST be above stack
79 SecCoreData
.DataSize
= sizeof(EFI_SEC_PEI_HAND_OFF
);
80 SecCoreData
.BootFirmwareVolumeBase
= (VOID
*)(UINTN
)PcdGet32 (PcdEmbeddedFdBaseAddress
);
81 SecCoreData
.BootFirmwareVolumeSize
= PcdGet32 (PcdEmbeddedFdSize
);
82 SecCoreData
.TemporaryRamBase
= (VOID
*)(UINTN
)PcdGet32 (PcdCPUCoresNonSecStackBase
); // We consider we run on the primary core (and so we use the first stack)
83 SecCoreData
.TemporaryRamSize
= (UINTN
)(UINTN
)PcdGet32 (PcdCPUCoresNonSecStackSize
);
84 SecCoreData
.PeiTemporaryRamBase
= (VOID
*)((UINTN
)(SecCoreData
.TemporaryRamBase
) + (SecCoreData
.TemporaryRamSize
/ 2));
85 SecCoreData
.PeiTemporaryRamSize
= SecCoreData
.TemporaryRamSize
/ 2;
86 SecCoreData
.StackBase
= SecCoreData
.TemporaryRamBase
;
87 SecCoreData
.StackSize
= SecCoreData
.TemporaryRamSize
- SecCoreData
.PeiTemporaryRamSize
;
89 // jump to pei core entry point
90 (PeiCoreEntryPoint
)(&SecCoreData
, (VOID
*)&gSecPpiTable
);