2 // Copyright (c) 2011, ARM Limited. All rights reserved.
4 // This program and the accompanying materials
5 // are licensed and made available under the terms and conditions of the BSD License
6 // which accompanies this distribution. The full text of the license may be found at
7 // http://opensource.org/licenses/bsd-license.php
9 // THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
10 // WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
15 #include <AsmMacroIoLib.h>
17 #include <Library/PcdLib.h>
18 #include <Library/ArmPlatformLib.h>
20 INCLUDE AsmMacroIoLib.inc
23 IMPORT ArmPlatformIsMemoryInitialized
24 IMPORT ArmPlatformInitializeBootMemory
25 IMPORT ArmDisableInterrupts
26 IMPORT ArmDisableCachesAndMmu
30 EXPORT _ModuleEntryPoint
32 #if (FixedPcdGet32(PcdMPCoreSupport))
37 AREA SecEntryPoint, CODE, READONLY
39 StartupAddr DCD CEntryPoint
42 //Set VBAR to the start of the exception vectors in Secure Mode
43 ldr r0, =SecVectorTable
46 // First ensure all interrupts are disabled
47 blx ArmDisableInterrupts
49 // Ensure that the MMU and caches are off
50 blx ArmDisableCachesAndMmu
57 //get ID of this CPU in Multicore system
59 // Only the primary core initialize the memory (SMC)
62 #if (FixedPcdGet32(PcdMPCoreSupport))
63 // ... The secondary cores wait for SCU to be enabled
67 beq _WaitForEnabledScu
72 bl ArmPlatformIsMemoryInitialized
75 // Initialize Init Memory
76 bl ArmPlatformInitializeBootMemory
78 // Only Primary CPU could run this line (the secondary cores have jumped from _IdentifyCpu to _SetupStack)
82 // Setup Stack for the 4 CPU cores
83 //Read Stack Base address from PCD
84 LoadConstantToReg (FixedPcdGet32(PcdCPUCoresSecStackBase), r1)
86 // Read Stack size from PCD
87 LoadConstantToReg (FixedPcdGet32(PcdCPUCoreSecStackSize), r2)
89 // Calcuate Stack Pointer reg value using Stack size and CPU ID.
90 mov r3,r5 // r3 = core_id
91 mul r3,r3,r2 // r3 = core_id * stack_size = offset from the stack base
92 add r3,r3,r1 // r3 = stack_base + offset
95 // Move sec startup address into a data register
96 // ensure we're jumping to FV version of the code (not boot remapped alias)