2 * Main file supporting the SEC Phase on ARM Platforms
4 * Copyright (c) 2011, ARM Limited. All rights reserved.
6 * This program and the accompanying materials
7 * are licensed and made available under the terms and conditions of the BSD License
8 * which accompanies this distribution. The full text of the license may be found at
9 * http://opensource.org/licenses/bsd-license.php
11 * THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
16 #include <Library/DebugAgentLib.h>
17 #include <Library/PrintLib.h>
18 #include <Library/BaseMemoryLib.h>
19 #include <Library/SerialPortLib.h>
20 #include <Library/ArmGicLib.h>
21 #include <Library/ArmCpuLib.h>
23 #include "SecInternal.h"
25 #define SerialPrint(txt) SerialPortWrite ((UINT8*)txt, AsciiStrLen(txt)+1);
27 extern VOID
*monitor_vector_table
;
38 // Invalidate the data cache. Doesn't have to do the Data cache clean.
39 ArmInvalidateDataCache();
41 // Invalidate Instruction Cache
42 ArmInvalidateInstructionCache();
44 // Invalidate I & D TLBs
45 ArmInvalidateInstructionAndDataTlb();
47 // CPU specific settings
50 // Enable Floating Point Coprocessor if supported by the platform
51 if (FixedPcdGet32 (PcdVFPEnabled
)) {
55 // Primary CPU clears out the SCU tag RAMs, secondaries wait
56 if (IS_PRIMARY_CORE(MpId
)) {
58 ArmCpuSynchronizeSignal (ARM_CPU_EVENT_BOOT_MEM_INIT
);
61 // SEC phase needs to run library constructors by hand. This assumes we are linked against the SerialLib
62 // In non SEC modules the init call is in autogenerated code.
63 SerialPortInitialize ();
66 CharCount
= AsciiSPrint (Buffer
,sizeof (Buffer
),"UEFI firmware built at %a on %a\n\r",__TIME__
, __DATE__
);
67 SerialPortWrite ((UINT8
*) Buffer
, CharCount
);
69 // Initialize the Debug Agent for Source Level Debugging
70 InitializeDebugAgent (DEBUG_AGENT_INIT_PREMEM_SEC
, NULL
, NULL
);
71 SaveAndSetDebugTimerInterrupt (TRUE
);
73 // Now we've got UART, make the check:
74 // - The Vector table must be 32-byte aligned
75 ASSERT(((UINT32
)SecVectorTable
& ((1 << 5)-1)) == 0);
77 // Enable the GIC distributor and CPU Interface
78 // - no other Interrupts are enabled, doesn't have to worry about the priority.
79 // - all the cores are in secure state, use secure SGI's
80 ArmGicEnableDistributor (PcdGet32(PcdGicDistributorBase
));
81 ArmGicEnableInterruptInterface (PcdGet32(PcdGicInterruptInterfaceBase
));
83 // Enable the GIC CPU Interface
84 ArmGicEnableInterruptInterface (PcdGet32(PcdGicInterruptInterfaceBase
));
87 // Enable Full Access to CoProcessors
88 ArmWriteCPACR (CPACR_CP_FULL_ACCESS
);
90 if (IS_PRIMARY_CORE(MpId
)) {
91 // Initialize peripherals that must be done at the early stage
92 // Example: Some L2x0 controllers must be initialized in Secure World
93 ArmPlatformSecInitialize ();
95 // If we skip the PEI Core we could want to initialize the DRAM in the SEC phase.
96 // If we are in standalone, we need the initialization to copy the UEFI firmware into DRAM
97 if (FeaturePcdGet (PcdSystemMemoryInitializeInSec
)) {
98 // Initialize system memory (DRAM)
99 ArmPlatformInitializeSystemMemory ();
103 // Test if Trustzone is supported on this platform
104 if (FixedPcdGetBool (PcdTrustzoneSupport
)) {
105 // Ensure the Monitor Stack Base & Size have been set
106 ASSERT(PcdGet32(PcdCPUCoresSecMonStackBase
) != 0);
107 ASSERT(PcdGet32(PcdCPUCoreSecMonStackSize
) != 0);
110 // Setup SMP in Non Secure world
111 ArmCpuSetupSmpNonSecure (GET_CORE_ID(MpId
));
114 // Enter Monitor Mode
115 enter_monitor_mode ((VOID
*)(PcdGet32(PcdCPUCoresSecMonStackBase
) + (PcdGet32(PcdCPUCoreSecMonStackSize
) * GET_CORE_POS(MpId
))));
117 //Write the monitor mode vector table address
118 ArmWriteVMBar((UINT32
) &monitor_vector_table
);
120 //-------------------- Monitor Mode ---------------------
121 // Setup the Trustzone Chipsets
122 if (IS_PRIMARY_CORE(MpId
)) {
123 ArmPlatformTrustzoneInit ();
125 // Waiting for the Primary Core to have finished to initialize the Secure World
126 ArmCpuSynchronizeSignal (ARM_CPU_EVENT_SECURE_INIT
);
128 // The secondary cores need to wait until the Trustzone chipsets configuration is done
129 // before switching to Non Secure World
131 // Waiting for the Primary Core to have finished to initialize the Secure World
132 ArmCpuSynchronizeWait (ARM_CPU_EVENT_SECURE_INIT
);
135 // Transfer the interrupt to Non-secure World
136 ArmGicSetupNonSecure (PcdGet32(PcdGicDistributorBase
), PcdGet32(PcdGicInterruptInterfaceBase
));
138 // Write to CP15 Non-secure Access Control Register
139 ArmWriteNsacr (PcdGet32 (PcdArmNsacr
));
141 // CP15 Secure Configuration Register
142 ArmWriteScr (PcdGet32 (PcdArmScr
));
144 if (IS_PRIMARY_CORE(MpId
)) {
145 SerialPrint ("Trust Zone Configuration is disabled\n\r");
148 // With Trustzone support the transition from Sec to Normal world is done by return_from_exception().
149 // If we want to keep this function call we need to ensure the SVC's SPSR point to the same Program
150 // Status Register as the the current one (CPSR).
151 copy_cpsr_into_spsr ();
154 JumpAddress
= PcdGet32 (PcdFvBaseAddress
);
155 ArmPlatformSecExtraAction (MpId
, &JumpAddress
);
157 // If PcdArmNonSecModeTransition is defined then set this specific mode to CPSR before the transition
158 // By not set, the mode for Non Secure World is SVC
159 if (PcdGet32 (PcdArmNonSecModeTransition
) != 0) {
160 set_non_secure_mode ((ARM_PROCESSOR_MODE
)PcdGet32 (PcdArmNonSecModeTransition
));
163 return_from_exception (JumpAddress
);
164 //-------------------- Non Secure Mode ---------------------
166 // PEI Core should always load and never return
171 SecCommonExceptionEntry (
181 CharCount
= AsciiSPrint (Buffer
,sizeof (Buffer
),"Reset Exception at 0x%X\n\r",LR
);
184 CharCount
= AsciiSPrint (Buffer
,sizeof (Buffer
),"Undefined Exception at 0x%X\n\r",LR
);
187 CharCount
= AsciiSPrint (Buffer
,sizeof (Buffer
),"SWI Exception at 0x%X\n\r",LR
);
190 CharCount
= AsciiSPrint (Buffer
,sizeof (Buffer
),"PrefetchAbort Exception at 0x%X\n\r",LR
);
193 CharCount
= AsciiSPrint (Buffer
,sizeof (Buffer
),"DataAbort Exception at 0x%X\n\r",LR
);
196 CharCount
= AsciiSPrint (Buffer
,sizeof (Buffer
),"Reserved Exception at 0x%X\n\r",LR
);
199 CharCount
= AsciiSPrint (Buffer
,sizeof (Buffer
),"IRQ Exception at 0x%X\n\r",LR
);
202 CharCount
= AsciiSPrint (Buffer
,sizeof (Buffer
),"FIQ Exception at 0x%X\n\r",LR
);
205 CharCount
= AsciiSPrint (Buffer
,sizeof (Buffer
),"Unknown Exception at 0x%X\n\r",LR
);
208 SerialPortWrite ((UINT8
*) Buffer
, CharCount
);