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/** @file
* Main file supporting the SEC Phase on ARM Platforms
*
* 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/DebugAgentLib.h>
#include <Library/PrintLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/SerialPortLib.h>
#include <Library/ArmGicLib.h>
#include <Library/ArmCpuLib.h>
#include "SecInternal.h"
#define SerialPrint(txt) SerialPortWrite ((UINT8*)txt, AsciiStrLen(txt)+1);
extern VOID *monitor_vector_table;
VOID
CEntryPoint (
IN UINTN MpId
)
{
CHAR8 Buffer[100];
UINTN CharCount;
UINTN JumpAddress;
// Primary CPU clears out the SCU tag RAMs, secondaries wait
if (IS_PRIMARY_CORE(MpId)) {
ArmCpuSetup (MpId);
if (ArmIsMpCore()) {
ArmCpuSynchronizeSignal (ARM_CPU_EVENT_BOOT_MEM_INIT);
}
// SEC phase needs to run library constructors by hand. This assumes we are linked against the SerialLib
// In non SEC modules the init call is in autogenerated code.
SerialPortInitialize ();
// Start talking
CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"UEFI firmware built at %a on %a\n\r",__TIME__, __DATE__);
SerialPortWrite ((UINT8 *) Buffer, CharCount);
// Initialize the Debug Agent for Source Level Debugging
InitializeDebugAgent (DEBUG_AGENT_INIT_PREMEM_SEC, NULL, NULL);
SaveAndSetDebugTimerInterrupt (TRUE);
// Now we've got UART, make the check:
// - The Vector table must be 32-byte aligned
ASSERT(((UINT32)SecVectorTable & ((1 << 5)-1)) == 0);
// Enable the GIC distributor and CPU Interface
// - no other Interrupts are enabled, doesn't have to worry about the priority.
// - all the cores are in secure state, use secure SGI's
ArmGicEnableDistributor (PcdGet32(PcdGicDistributorBase));
ArmGicEnableInterruptInterface (PcdGet32(PcdGicInterruptInterfaceBase));
} else {
// Enable the GIC CPU Interface
ArmGicEnableInterruptInterface (PcdGet32(PcdGicInterruptInterfaceBase));
}
// Invalidate the data cache. Doesn't have to do the Data cache clean.
ArmInvalidateDataCache();
// Invalidate Instruction Cache
ArmInvalidateInstructionCache();
// Invalidate I & D TLBs
ArmInvalidateInstructionAndDataTlb();
// Enable Full Access to CoProcessors
ArmWriteCPACR (CPACR_CP_FULL_ACCESS);
if (FixedPcdGet32 (PcdVFPEnabled)) {
ArmEnableVFP();
}
if (IS_PRIMARY_CORE(MpId)) {
// Initialize peripherals that must be done at the early stage
// Example: Some L2x0 controllers must be initialized in Secure World
ArmPlatformSecInitialize ();
// If we skip the PEI Core we could want to initialize the DRAM in the SEC phase.
// If we are in standalone, we need the initialization to copy the UEFI firmware into DRAM
if (FeaturePcdGet (PcdSystemMemoryInitializeInSec)) {
// Initialize system memory (DRAM)
ArmPlatformInitializeSystemMemory ();
}
}
// Test if Trustzone is supported on this platform
if (FixedPcdGetBool (PcdTrustzoneSupport)) {
// Ensure the Monitor Stack Base & Size have been set
ASSERT(PcdGet32(PcdCPUCoresSecMonStackBase) != 0);
ASSERT(PcdGet32(PcdCPUCoreSecMonStackSize) != 0);
if (ArmIsMpCore()) {
// Setup SMP in Non Secure world
ArmCpuSetupSmpNonSecure (GET_CORE_ID(MpId));
}
// Enter Monitor Mode
enter_monitor_mode ((VOID*)(PcdGet32(PcdCPUCoresSecMonStackBase) + (PcdGet32(PcdCPUCoreSecMonStackSize) * GET_CORE_POS(MpId))));
//Write the monitor mode vector table address
ArmWriteVMBar((UINT32) &monitor_vector_table);
//-------------------- Monitor Mode ---------------------
// Setup the Trustzone Chipsets
if (IS_PRIMARY_CORE(MpId)) {
ArmPlatformTrustzoneInit ();
// Waiting for the Primary Core to have finished to initialize the Secure World
ArmCpuSynchronizeSignal (ARM_CPU_EVENT_SECURE_INIT);
} else {
// The secondary cores need to wait until the Trustzone chipsets configuration is done
// before switching to Non Secure World
// Waiting for the Primary Core to have finished to initialize the Secure World
ArmCpuSynchronizeWait (ARM_CPU_EVENT_SECURE_INIT);
}
// Transfer the interrupt to Non-secure World
ArmGicSetupNonSecure (PcdGet32(PcdGicDistributorBase), PcdGet32(PcdGicInterruptInterfaceBase));
// Write to CP15 Non-secure Access Control Register
ArmWriteNsacr (PcdGet32 (PcdArmNsacr));
// CP15 Secure Configuration Register
ArmWriteScr (PcdGet32 (PcdArmScr));
} else {
if (IS_PRIMARY_CORE(MpId)) {
SerialPrint ("Trust Zone Configuration is disabled\n\r");
}
// With Trustzone support the transition from Sec to Normal world is done by return_from_exception().
// If we want to keep this function call we need to ensure the SVC's SPSR point to the same Program
// Status Register as the the current one (CPSR).
copy_cpsr_into_spsr ();
}
JumpAddress = PcdGet32 (PcdFvBaseAddress);
ArmPlatformSecExtraAction (MpId, &JumpAddress);
// If PcdArmNonSecModeTransition is defined then set this specific mode to CPSR before the transition
// By not set, the mode for Non Secure World is SVC
if (PcdGet32 (PcdArmNonSecModeTransition) != 0) {
set_non_secure_mode ((ARM_PROCESSOR_MODE)PcdGet32 (PcdArmNonSecModeTransition));
}
return_from_exception (JumpAddress);
//-------------------- Non Secure Mode ---------------------
// PEI Core should always load and never return
ASSERT (FALSE);
}
VOID
SecCommonExceptionEntry (
IN UINT32 Entry,
IN UINT32 LR
)
{
CHAR8 Buffer[100];
UINTN CharCount;
switch (Entry) {
case 0:
CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"Reset Exception at 0x%X\n\r",LR);
break;
case 1:
CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"Undefined Exception at 0x%X\n\r",LR);
break;
case 2:
CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"SWI Exception at 0x%X\n\r",LR);
break;
case 3:
CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"PrefetchAbort Exception at 0x%X\n\r",LR);
break;
case 4:
CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"DataAbort Exception at 0x%X\n\r",LR);
break;
case 5:
CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"Reserved Exception at 0x%X\n\r",LR);
break;
case 6:
CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"IRQ Exception at 0x%X\n\r",LR);
break;
case 7:
CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"FIQ Exception at 0x%X\n\r",LR);
break;
default:
CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"Unknown Exception at 0x%X\n\r",LR);
break;
}
SerialPortWrite ((UINT8 *) Buffer, CharCount);
while(1);
}
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