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1d5d0ae9 | 1 | /** @file |
009f583f | 2 | * Main file supporting the SEC Phase on ARM Platforms |
1d5d0ae9 | 3 | * |
8cc852f7 | 4 | * Copyright (c) 2011-2012, ARM Limited. All rights reserved. |
1d5d0ae9 | 5 | * |
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 | |
10 | * | |
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. | |
13 | * | |
14 | **/ | |
15 | ||
8cc852f7 | 16 | #include <Library/ArmTrustedMonitorLib.h> |
a6caee65 | 17 | #include <Library/DebugAgentLib.h> |
2637d1ef | 18 | #include <Library/PrintLib.h> |
1d5d0ae9 | 19 | #include <Library/BaseMemoryLib.h> |
1d5d0ae9 | 20 | #include <Library/SerialPortLib.h> |
55a0d64b | 21 | #include <Library/ArmGicLib.h> |
0620eec9 | 22 | |
009f583f | 23 | #include "SecInternal.h" |
24 | ||
e862cd50 | 25 | #define SerialPrint(txt) SerialPortWrite ((UINT8*)txt, AsciiStrLen(txt)+1); |
2637d1ef | 26 | |
1d5d0ae9 | 27 | VOID |
28 | CEntryPoint ( | |
a75568e9 | 29 | IN UINTN MpId, |
30 | IN UINTN SecBootMode | |
1d5d0ae9 | 31 | ) |
32 | { | |
2637d1ef | 33 | CHAR8 Buffer[100]; |
34 | UINTN CharCount; | |
3d93aeae | 35 | UINTN JumpAddress; |
2637d1ef | 36 | |
710b8acb | 37 | // Invalidate the data cache. Doesn't have to do the Data cache clean. |
38 | ArmInvalidateDataCache(); | |
39 | ||
40 | // Invalidate Instruction Cache | |
41 | ArmInvalidateInstructionCache(); | |
42 | ||
43 | // Invalidate I & D TLBs | |
44 | ArmInvalidateInstructionAndDataTlb(); | |
45 | ||
46 | // CPU specific settings | |
47 | ArmCpuSetup (MpId); | |
48 | ||
82344416 | 49 | // Enable Floating Point Coprocessor if supported by the platform |
50 | if (FixedPcdGet32 (PcdVFPEnabled)) { | |
51 | ArmEnableVFP(); | |
52 | } | |
e314d564 | 53 | |
54 | // Initialize peripherals that must be done at the early stage | |
55 | // Example: Some L2 controller, interconnect, clock, DMC, etc | |
56 | ArmPlatformSecInitialize (MpId); | |
57 | ||
1d5d0ae9 | 58 | // Primary CPU clears out the SCU tag RAMs, secondaries wait |
8cfd2e24 | 59 | if (IS_PRIMARY_CORE(MpId) && (SecBootMode == ARM_SEC_COLD_BOOT)) { |
90d6a1bb | 60 | if (ArmIsMpCore()) { |
b1d41be7 | 61 | // Signal for the initial memory is configured (event: BOOT_MEM_INIT) |
62 | ArmCallSEV (); | |
1d5d0ae9 | 63 | } |
64 | ||
65 | // SEC phase needs to run library constructors by hand. This assumes we are linked against the SerialLib | |
66 | // In non SEC modules the init call is in autogenerated code. | |
67 | SerialPortInitialize (); | |
2637d1ef | 68 | |
1d5d0ae9 | 69 | // Start talking |
99744d52 | 70 | if (FixedPcdGetBool (PcdTrustzoneSupport)) { |
71 | CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"Secure firmware (version %s built at %a on %a)\n\r", | |
72 | (CHAR16*)PcdGetPtr(PcdFirmwareVersionString), __TIME__, __DATE__); | |
73 | } else { | |
74 | CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"Boot firmware (version %s built at %a on %a)\n\r", | |
75 | (CHAR16*)PcdGetPtr(PcdFirmwareVersionString), __TIME__, __DATE__); | |
76 | } | |
2637d1ef | 77 | SerialPortWrite ((UINT8 *) Buffer, CharCount); |
1d5d0ae9 | 78 | |
a6caee65 | 79 | // Initialize the Debug Agent for Source Level Debugging |
80 | InitializeDebugAgent (DEBUG_AGENT_INIT_PREMEM_SEC, NULL, NULL); | |
81 | SaveAndSetDebugTimerInterrupt (TRUE); | |
82 | ||
1d5d0ae9 | 83 | // Now we've got UART, make the check: |
84 | // - The Vector table must be 32-byte aligned | |
85 | ASSERT(((UINT32)SecVectorTable & ((1 << 5)-1)) == 0); | |
90d6a1bb | 86 | |
87 | // Enable the GIC distributor and CPU Interface | |
88 | // - no other Interrupts are enabled, doesn't have to worry about the priority. | |
89 | // - all the cores are in secure state, use secure SGI's | |
90 | ArmGicEnableDistributor (PcdGet32(PcdGicDistributorBase)); | |
91 | ArmGicEnableInterruptInterface (PcdGet32(PcdGicInterruptInterfaceBase)); | |
92 | } else { | |
93 | // Enable the GIC CPU Interface | |
94 | ArmGicEnableInterruptInterface (PcdGet32(PcdGicInterruptInterfaceBase)); | |
1d5d0ae9 | 95 | } |
96 | ||
1d5d0ae9 | 97 | // Enable Full Access to CoProcessors |
836c3500 | 98 | ArmWriteCpacr (CPACR_CP_FULL_ACCESS); |
1d5d0ae9 | 99 | |
1d5d0ae9 | 100 | // Test if Trustzone is supported on this platform |
12c5ae23 | 101 | if (FixedPcdGetBool (PcdTrustzoneSupport)) { |
90d6a1bb | 102 | if (ArmIsMpCore()) { |
1d5d0ae9 | 103 | // Setup SMP in Non Secure world |
90d6a1bb | 104 | ArmCpuSetupSmpNonSecure (GET_CORE_ID(MpId)); |
1d5d0ae9 | 105 | } |
106 | ||
d9c69d99 | 107 | // Either we use the Secure Stacks for Secure Monitor (in this case (Base == 0) && (Size == 0)) |
108 | // Or we use separate Secure Monitor stacks (but (Base != 0) && (Size != 0)) | |
109 | ASSERT (((PcdGet32(PcdCPUCoresSecMonStackBase) == 0) && (PcdGet32(PcdCPUCoreSecMonStackSize) == 0)) || | |
110 | ((PcdGet32(PcdCPUCoresSecMonStackBase) != 0) && (PcdGet32(PcdCPUCoreSecMonStackSize) != 0))); | |
111 | ||
1d5d0ae9 | 112 | // Enter Monitor Mode |
a75568e9 | 113 | enter_monitor_mode ((UINTN)TrustedWorldInitialization, MpId, SecBootMode, (VOID*)(PcdGet32(PcdCPUCoresSecMonStackBase) + (PcdGet32(PcdCPUCoreSecMonStackSize) * (GET_CORE_POS(MpId) + 1)))); |
a8530889 | 114 | } else { |
115 | if (IS_PRIMARY_CORE(MpId)) { | |
116 | SerialPrint ("Trust Zone Configuration is disabled\n\r"); | |
117 | } | |
1d5d0ae9 | 118 | |
a8530889 | 119 | // With Trustzone support the transition from Sec to Normal world is done by return_from_exception(). |
120 | // If we want to keep this function call we need to ensure the SVC's SPSR point to the same Program | |
121 | // Status Register as the the current one (CPSR). | |
122 | copy_cpsr_into_spsr (); | |
123 | ||
3d93aeae | 124 | // Call the Platform specific function to execute additional actions if required |
125 | JumpAddress = PcdGet32 (PcdFvBaseAddress); | |
126 | ArmPlatformSecExtraAction (MpId, &JumpAddress); | |
127 | ||
128 | NonTrustedWorldTransition (MpId, JumpAddress); | |
a8530889 | 129 | } |
130 | ASSERT (0); // We must never return from the above function | |
131 | } | |
132 | ||
133 | VOID | |
134 | TrustedWorldInitialization ( | |
a75568e9 | 135 | IN UINTN MpId, |
136 | IN UINTN SecBootMode | |
a8530889 | 137 | ) |
138 | { | |
3d93aeae | 139 | UINTN JumpAddress; |
140 | ||
8cc852f7 | 141 | //-------------------- Monitor Mode --------------------- |
142 | ||
143 | // Set up Monitor World (Vector Table, etc) | |
144 | ArmSecureMonitorWorldInitialize (); | |
1d5d0ae9 | 145 | |
5e773144 | 146 | // Transfer the interrupt to Non-secure World |
147 | ArmGicSetupNonSecure (MpId, PcdGet32(PcdGicDistributorBase), PcdGet32(PcdGicInterruptInterfaceBase)); | |
80dfbc11 | 148 | |
5e773144 | 149 | // Initialize platform specific security policy |
e314d564 | 150 | ArmPlatformSecTrustzoneInit (MpId); |
1d5d0ae9 | 151 | |
5e773144 | 152 | // Setup the Trustzone Chipsets |
8cfd2e24 | 153 | if (SecBootMode == ARM_SEC_COLD_BOOT) { |
154 | if (IS_PRIMARY_CORE(MpId)) { | |
155 | if (ArmIsMpCore()) { | |
156 | // Signal the secondary core the Security settings is done (event: EVENT_SECURE_INIT) | |
157 | ArmCallSEV (); | |
158 | } | |
159 | } else { | |
160 | // The secondary cores need to wait until the Trustzone chipsets configuration is done | |
161 | // before switching to Non Secure World | |
1d5d0ae9 | 162 | |
8cfd2e24 | 163 | // Wait for the Primary Core to finish the initialization of the Secure World (event: EVENT_SECURE_INIT) |
164 | ArmCallWFE (); | |
165 | } | |
a8530889 | 166 | } |
1d5d0ae9 | 167 | |
b1d41be7 | 168 | // Call the Platform specific function to execute additional actions if required |
3d93aeae | 169 | JumpAddress = PcdGet32 (PcdFvBaseAddress); |
170 | ArmPlatformSecExtraAction (MpId, &JumpAddress); | |
171 | ||
a8530889 | 172 | // Write to CP15 Non-secure Access Control Register |
173 | ArmWriteNsacr (PcdGet32 (PcdArmNsacr)); | |
1d5d0ae9 | 174 | |
a8530889 | 175 | // CP15 Secure Configuration Register |
176 | ArmWriteScr (PcdGet32 (PcdArmScr)); | |
177 | ||
3d93aeae | 178 | NonTrustedWorldTransition (MpId, JumpAddress); |
a8530889 | 179 | } |
180 | ||
181 | VOID | |
182 | NonTrustedWorldTransition ( | |
3d93aeae | 183 | IN UINTN MpId, |
184 | IN UINTN JumpAddress | |
a8530889 | 185 | ) |
186 | { | |
513aa349 | 187 | // If PcdArmNonSecModeTransition is defined then set this specific mode to CPSR before the transition |
188 | // By not set, the mode for Non Secure World is SVC | |
189 | if (PcdGet32 (PcdArmNonSecModeTransition) != 0) { | |
190 | set_non_secure_mode ((ARM_PROCESSOR_MODE)PcdGet32 (PcdArmNonSecModeTransition)); | |
191 | } | |
192 | ||
a6caee65 | 193 | return_from_exception (JumpAddress); |
1d5d0ae9 | 194 | //-------------------- Non Secure Mode --------------------- |
195 | ||
196 | // PEI Core should always load and never return | |
197 | ASSERT (FALSE); | |
198 | } | |
199 | ||
2637d1ef | 200 | VOID |
201 | SecCommonExceptionEntry ( | |
202 | IN UINT32 Entry, | |
203 | IN UINT32 LR | |
204 | ) | |
205 | { | |
206 | CHAR8 Buffer[100]; | |
207 | UINTN CharCount; | |
208 | ||
1d5d0ae9 | 209 | switch (Entry) { |
210 | case 0: | |
2637d1ef | 211 | CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"Reset Exception at 0x%X\n\r",LR); |
1d5d0ae9 | 212 | break; |
213 | case 1: | |
2637d1ef | 214 | CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"Undefined Exception at 0x%X\n\r",LR); |
1d5d0ae9 | 215 | break; |
216 | case 2: | |
2637d1ef | 217 | CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"SWI Exception at 0x%X\n\r",LR); |
1d5d0ae9 | 218 | break; |
219 | case 3: | |
2637d1ef | 220 | CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"PrefetchAbort Exception at 0x%X\n\r",LR); |
1d5d0ae9 | 221 | break; |
222 | case 4: | |
2637d1ef | 223 | CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"DataAbort Exception at 0x%X\n\r",LR); |
1d5d0ae9 | 224 | break; |
225 | case 5: | |
2637d1ef | 226 | CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"Reserved Exception at 0x%X\n\r",LR); |
1d5d0ae9 | 227 | break; |
228 | case 6: | |
2637d1ef | 229 | CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"IRQ Exception at 0x%X\n\r",LR); |
1d5d0ae9 | 230 | break; |
231 | case 7: | |
2637d1ef | 232 | CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"FIQ Exception at 0x%X\n\r",LR); |
1d5d0ae9 | 233 | break; |
234 | default: | |
2637d1ef | 235 | CharCount = AsciiSPrint (Buffer,sizeof (Buffer),"Unknown Exception at 0x%X\n\r",LR); |
1d5d0ae9 | 236 | break; |
237 | } | |
2637d1ef | 238 | SerialPortWrite ((UINT8 *) Buffer, CharCount); |
1d5d0ae9 | 239 | while(1); |
240 | } |