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.
15 #include <Library/ArmGicLib.h>
17 #include <Ppi/ArmMpCoreInfo.h>
19 #include "PrePeiCore.h"
22 * This is the main function for secondary cores. They loop around until a non Null value is written to
23 * SYS_FLAGS register.The SYS_FLAGS register is platform specific.
24 * Note:The secondary cores, while executing secondary_main, assumes that:
25 * : SGI 0 is configured as Non-secure interrupt
26 * : Priority Mask is configured to allow SGI 0
27 * : Interrupt Distributor and CPU interfaces are enabled
39 EFI_PEI_PPI_DESCRIPTOR
*PpiList
;
40 ARM_MP_CORE_INFO_PPI
*ArmMpCoreInfoPpi
;
43 ARM_CORE_INFO
*ArmCoreInfoTable
;
46 VOID (*SecondaryStart
)(VOID
);
47 UINTN SecondaryEntryAddr
;
49 ClusterId
= GET_CLUSTER_ID(MpId
);
50 CoreId
= GET_CORE_ID(MpId
);
52 // Get the gArmMpCoreInfoPpiGuid
54 ArmPlatformGetPlatformPpiList (&PpiListSize
, &PpiList
);
55 PpiListCount
= PpiListSize
/ sizeof(EFI_PEI_PPI_DESCRIPTOR
);
56 for (Index
= 0; Index
< PpiListCount
; Index
++, PpiList
++) {
57 if (CompareGuid (PpiList
->Guid
, &gArmMpCoreInfoPpiGuid
) == TRUE
) {
62 // On MP Core Platform we must implement the ARM MP Core Info PPI
63 ASSERT (Index
!= PpiListCount
);
65 ArmMpCoreInfoPpi
= PpiList
->Ppi
;
67 Status
= ArmMpCoreInfoPpi
->GetMpCoreInfo (&ArmCoreCount
, &ArmCoreInfoTable
);
68 ASSERT_EFI_ERROR (Status
);
70 // Find the core in the ArmCoreTable
71 for (Index
= 0; Index
< ArmCoreCount
; Index
++) {
72 if ((ArmCoreInfoTable
[Index
].ClusterId
== ClusterId
) && (ArmCoreInfoTable
[Index
].CoreId
== CoreId
)) {
77 // The ARM Core Info Table must define every core
78 ASSERT (Index
!= ArmCoreCount
);
80 // Clear Secondary cores MailBox
81 MmioWrite32 (ArmCoreInfoTable
[Index
].MailboxClearAddress
, ArmCoreInfoTable
[Index
].MailboxClearValue
);
83 SecondaryEntryAddr
= 0;
84 while (SecondaryEntryAddr
= MmioRead32 (ArmCoreInfoTable
[Index
].MailboxGetAddress
), SecondaryEntryAddr
== 0) {
86 // Acknowledge the interrupt and send End of Interrupt signal.
87 ArmGicAcknowledgeSgiFrom (PcdGet32(PcdGicInterruptInterfaceBase
), PRIMARY_CORE_ID
);
90 // Jump to secondary core entry point.
91 SecondaryStart
= (VOID (*)())SecondaryEntryAddr
;
94 // The secondaries shouldn't reach here
101 IN EFI_PEI_CORE_ENTRY_POINT PeiCoreEntryPoint
104 EFI_SEC_PEI_HAND_OFF SecCoreData
;
106 EFI_PEI_PPI_DESCRIPTOR
*PpiList
;
107 UINTN TemporaryRamBase
;
108 UINTN TemporaryRamSize
;
110 CreatePpiList (&PpiListSize
, &PpiList
);
112 // Enable the GIC Distributor
113 ArmGicEnableDistributor(PcdGet32(PcdGicDistributorBase
));
115 // If ArmVe has not been built as Standalone then we need to wake up the secondary cores
116 if (FeaturePcdGet (PcdSendSgiToBringUpSecondaryCores
)) {
117 // Sending SGI to all the Secondary CPU interfaces
118 ArmGicSendSgiTo (PcdGet32(PcdGicDistributorBase
), ARM_GIC_ICDSGIR_FILTER_EVERYONEELSE
, 0x0E);
121 // Adjust the Temporary Ram as the new Ppi List (Common + Platform Ppi Lists) is created at
122 // the base of the primary core stack
123 PpiListSize
= ALIGN_VALUE(PpiListSize
, 0x4);
124 TemporaryRamBase
= (UINTN
)PcdGet32 (PcdCPUCoresStackBase
) + PpiListSize
;
125 TemporaryRamSize
= (UINTN
)PcdGet32 (PcdCPUCorePrimaryStackSize
) - PpiListSize
;
128 // Bind this information into the SEC hand-off state
129 // Note: this must be in sync with the stuff in the asm file
130 // Note also: HOBs (pei temp ram) MUST be above stack
132 SecCoreData
.DataSize
= sizeof(EFI_SEC_PEI_HAND_OFF
);
133 SecCoreData
.BootFirmwareVolumeBase
= (VOID
*)(UINTN
)PcdGet32 (PcdFvBaseAddress
);
134 SecCoreData
.BootFirmwareVolumeSize
= PcdGet32 (PcdFvSize
);
135 SecCoreData
.TemporaryRamBase
= (VOID
*)TemporaryRamBase
; // We run on the primary core (and so we use the first stack)
136 SecCoreData
.TemporaryRamSize
= TemporaryRamSize
;
137 SecCoreData
.PeiTemporaryRamBase
= SecCoreData
.TemporaryRamBase
;
138 SecCoreData
.PeiTemporaryRamSize
= SecCoreData
.TemporaryRamSize
/ 2;
139 SecCoreData
.StackBase
= (VOID
*)((UINTN
)(SecCoreData
.TemporaryRamBase
) + (SecCoreData
.TemporaryRamSize
/2));
140 SecCoreData
.StackSize
= SecCoreData
.TemporaryRamSize
/ 2;
142 // Jump to PEI core entry point
143 (PeiCoreEntryPoint
)(&SecCoreData
, PpiList
);