/** @file
-* Main file supporting the SEC Phase for Versatile Express
+* Main file supporting the SEC Phase on ARM Platforms
*
-* Copyright (c) 2011, ARM Limited. All rights reserved.
+* Copyright (c) 2011-2012, 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
*
**/
-#include <Library/DebugLib.h>
+#include <Library/ArmTrustedMonitorLib.h>
#include <Library/DebugAgentLib.h>
-#include <Library/PcdLib.h>
#include <Library/PrintLib.h>
-#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
-#include <Library/ArmLib.h>
#include <Library/SerialPortLib.h>
-#include <Library/ArmPlatformLib.h>
+#include <Library/ArmGicLib.h>
-#include <Chipset/ArmV7.h>
-#include <Drivers/PL390Gic.h>
-
-#define ARM_PRIMARY_CORE 0
+#include "SecInternal.h"
#define SerialPrint(txt) SerialPortWrite ((UINT8*)txt, AsciiStrLen(txt)+1);
-extern VOID *monitor_vector_table;
-
-VOID
-ArmSetupGicNonSecure (
- IN INTN GicDistributorBase,
- IN INTN GicInterruptInterfaceBase
-);
-
-// Vector Table for Sec Phase
-VOID
-SecVectorTable (
- VOID
- );
-
-VOID
-NonSecureWaitForFirmware (
- VOID
- );
-
-VOID
-enter_monitor_mode(
- IN VOID* Stack
- );
-
-VOID
-return_from_exception (
- IN UINTN NonSecureBase
- );
-
-VOID
-copy_cpsr_into_spsr (
- VOID
- );
-
VOID
CEntryPoint (
- IN UINTN CoreId
+ IN UINTN MpId,
+ IN UINTN SecBootMode
)
{
CHAR8 Buffer[100];
UINTN CharCount;
UINTN JumpAddress;
+ // Invalidate the data cache. Doesn't have to do the Data cache clean.
+ ArmInvalidateDataCache();
+
+ // Invalidate Instruction Cache
+ ArmInvalidateInstructionCache();
+
+ // Invalidate I & D TLBs
+ ArmInvalidateInstructionAndDataTlb();
+
+ // CPU specific settings
+ ArmCpuSetup (MpId);
+
+ // Enable Floating Point Coprocessor if supported by the platform
+ if (FixedPcdGet32 (PcdVFPEnabled)) {
+ ArmEnableVFP();
+ }
+
+ // Initialize peripherals that must be done at the early stage
+ // Example: Some L2 controller, interconnect, clock, DMC, etc
+ ArmPlatformSecInitialize (MpId);
+
// Primary CPU clears out the SCU tag RAMs, secondaries wait
- if (CoreId == ARM_PRIMARY_CORE) {
- if (FixedPcdGet32(PcdMPCoreSupport)) {
- ArmInvalidScu();
+ if (IS_PRIMARY_CORE(MpId) && (SecBootMode == ARM_SEC_COLD_BOOT)) {
+ if (ArmIsMpCore()) {
+ // Signal for the initial memory is configured (event: BOOT_MEM_INIT)
+ ArmCallSEV ();
}
// SEC phase needs to run library constructors by hand. This assumes we are linked against the SerialLib
SerialPortInitialize ();
// Start talking
- CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"UEFI firmware built at %a on %a\n\r",__TIME__, __DATE__);
+ if (FixedPcdGetBool (PcdTrustzoneSupport)) {
+ CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"Secure firmware (version %s built at %a on %a)\n\r",
+ (CHAR16*)PcdGetPtr(PcdFirmwareVersionString), __TIME__, __DATE__);
+ } else {
+ CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"Boot firmware (version %s built at %a on %a)\n\r",
+ (CHAR16*)PcdGetPtr(PcdFirmwareVersionString), __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);
+ ArmWriteCpacr (CPACR_CP_FULL_ACCESS);
- // Enable SWP instructions
- ArmEnableSWPInstruction();
+ // Test if Trustzone is supported on this platform
+ if (FixedPcdGetBool (PcdTrustzoneSupport)) {
+ if (ArmIsMpCore()) {
+ // Setup SMP in Non Secure world
+ ArmCpuSetupSmpNonSecure (GET_CORE_ID(MpId));
+ }
- // Enable program flow prediction, if supported.
- ArmEnableBranchPrediction();
+ // Either we use the Secure Stacks for Secure Monitor (in this case (Base == 0) && (Size == 0))
+ // Or we use separate Secure Monitor stacks (but (Base != 0) && (Size != 0))
+ ASSERT (((PcdGet32(PcdCPUCoresSecMonStackBase) == 0) && (PcdGet32(PcdCPUCoreSecMonStackSize) == 0)) ||
+ ((PcdGet32(PcdCPUCoresSecMonStackBase) != 0) && (PcdGet32(PcdCPUCoreSecMonStackSize) != 0)));
- if (FixedPcdGet32(PcdVFPEnabled)) {
- ArmEnableVFP();
- }
+ // Enter Monitor Mode
+ enter_monitor_mode ((UINTN)TrustedWorldInitialization, MpId, SecBootMode, (VOID*)(PcdGet32(PcdCPUCoresSecMonStackBase) + (PcdGet32(PcdCPUCoreSecMonStackSize) * (GET_CORE_POS(MpId) + 1))));
+ } else {
+ if (IS_PRIMARY_CORE(MpId)) {
+ SerialPrint ("Trust Zone Configuration is disabled\n\r");
+ }
- if (CoreId == ARM_PRIMARY_CORE) {
- // Initialize peripherals that must be done at the early stage
- // Example: Some L2x0 controllers must be initialized in Secure World
- ArmPlatformSecInitialize ();
+ // 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 ();
- // 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 ();
- }
+ // Call the Platform specific function to execute additional actions if required
+ JumpAddress = PcdGet32 (PcdFvBaseAddress);
+ ArmPlatformSecExtraAction (MpId, &JumpAddress);
- // Some platform can change their physical memory mapping
- ArmPlatformBootRemapping ();
+ NonTrustedWorldTransition (MpId, JumpAddress);
}
+ ASSERT (0); // We must never return from the above function
+}
- // Test if Trustzone is supported on this platform
- if (ArmPlatformTrustzoneSupported()) {
- if (FixedPcdGet32(PcdMPCoreSupport)) {
- // Setup SMP in Non Secure world
- ArmSetupSmpNonSecure (CoreId);
- }
-
- // Enter Monitor Mode
- enter_monitor_mode((VOID*)(PcdGet32(PcdCPUCoresSecMonStackBase) + (PcdGet32(PcdCPUCoreSecMonStackSize) * CoreId)));
+VOID
+TrustedWorldInitialization (
+ IN UINTN MpId,
+ IN UINTN SecBootMode
+ )
+{
+ UINTN JumpAddress;
- //Write the monitor mode vector table address
- ArmWriteVMBar((UINT32) &monitor_vector_table);
+ //-------------------- Monitor Mode ---------------------
- //-------------------- Monitor Mode ---------------------
- // Setup the Trustzone Chipsets
- if (CoreId == ARM_PRIMARY_CORE) {
- ArmPlatformTrustzoneInit();
+ // Set up Monitor World (Vector Table, etc)
+ ArmSecureMonitorWorldInitialize ();
- // Wake up the secondary cores by sending a interrupt to everyone else
- // NOTE 1: The Software Generated Interrupts are always enabled on Cortex-A9
- // MPcore test chip on Versatile Express board, So the Software doesn't have to
- // enable SGI's explicitly.
- // 2: As no other Interrupts are enabled, doesn't have to worry about the priority.
- // 3: As all the cores are in secure state, use secure SGI's
- //
+ // Transfer the interrupt to Non-secure World
+ ArmGicSetupNonSecure (MpId, PcdGet32(PcdGicDistributorBase), PcdGet32(PcdGicInterruptInterfaceBase));
- PL390GicEnableDistributor (PcdGet32(PcdGicDistributorBase));
- PL390GicEnableInterruptInterface (PcdGet32(PcdGicInterruptInterfaceBase));
+ // Initialize platform specific security policy
+ ArmPlatformSecTrustzoneInit (MpId);
- // Send SGI to all Secondary core to wake them up from WFI state.
- PL390GicSendSgiTo (PcdGet32(PcdGicDistributorBase), GIC_ICDSGIR_FILTER_EVERYONEELSE, 0x0E);
+ // Setup the Trustzone Chipsets
+ if (SecBootMode == ARM_SEC_COLD_BOOT) {
+ if (IS_PRIMARY_CORE(MpId)) {
+ if (ArmIsMpCore()) {
+ // Signal the secondary core the Security settings is done (event: EVENT_SECURE_INIT)
+ ArmCallSEV ();
+ }
} else {
// The secondary cores need to wait until the Trustzone chipsets configuration is done
// before switching to Non Secure World
- // Enabled GIC CPU Interface
- PL390GicEnableInterruptInterface (PcdGet32(PcdGicInterruptInterfaceBase));
-
- // Waiting for the SGI from the primary core
- ArmCallWFI();
-
- // Acknowledge the interrupt and send End of Interrupt signal.
- PL390GicAcknowledgeSgiFrom (PcdGet32(PcdGicInterruptInterfaceBase), ARM_PRIMARY_CORE);
+ // Wait for the Primary Core to finish the initialization of the Secure World (event: EVENT_SECURE_INIT)
+ ArmCallWFE ();
}
+ }
- // Transfer the interrupt to Non-secure World
- PL390GicSetupNonSecure (PcdGet32(PcdGicDistributorBase),PcdGet32(PcdGicInterruptInterfaceBase));
+ // Call the Platform specific function to execute additional actions if required
+ JumpAddress = PcdGet32 (PcdFvBaseAddress);
+ ArmPlatformSecExtraAction (MpId, &JumpAddress);
- // Write to CP15 Non-secure Access Control Register :
- // - Enable CP10 and CP11 accesses in NS World
- // - Enable Access to Preload Engine in NS World
- // - Enable lockable TLB entries allocation in NS world
- // - Enable R/W access to SMP bit of Auxiliary Control Register in NS world
- ArmWriteNsacr(NSACR_NS_SMP | NSACR_TL | NSACR_PLE | NSACR_CP(10) | NSACR_CP(11));
+ // Write to CP15 Non-secure Access Control Register
+ ArmWriteNsacr (PcdGet32 (PcdArmNsacr));
- // CP15 Secure Configuration Register with Non Secure bit (SCR_NS), CPSR.A modified in any
- // security state (SCR_AW), CPSR.F modified in any security state (SCR_FW)
- ArmWriteScr(SCR_NS | SCR_FW | SCR_AW);
- } else {
- if (CoreId == ARM_PRIMARY_CORE) {
- SerialPrint ("Trust Zone Configuration is disabled\n\r");
- }
+ // CP15 Secure Configuration Register
+ ArmWriteScr (PcdGet32 (PcdArmScr));
- // Trustzone is not enabled, just enable the Distributor and CPU interface
- if (CoreId == ARM_PRIMARY_CORE) {
- PL390GicEnableDistributor (PcdGet32(PcdGicDistributorBase));
- }
- PL390GicEnableInterruptInterface (PcdGet32(PcdGicInterruptInterfaceBase));
+ NonTrustedWorldTransition (MpId, JumpAddress);
+}
- // 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 ();
+VOID
+NonTrustedWorldTransition (
+ IN UINTN MpId,
+ IN UINTN 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));
}
- JumpAddress = PcdGet32 (PcdNormalFvBaseAddress);
- ArmPlatformSecExtraAction (CoreId, &JumpAddress);
-
return_from_exception (JumpAddress);
//-------------------- Non Secure Mode ---------------------
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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