Difference between revisions of "Secure Monitor"

From Nintendo Switch Brew
Jump to navigation Jump to search
(Long overdue update)
Line 228: Line 228:
 
| 13 || [[#IsChargerHiZModeEnabled]]
 
| 13 || [[#IsChargerHiZModeEnabled]]
 
|-
 
|-
−
| 14 || [4.0.0+] [[#QuestState]]
+
| 14 || [4.0.0+] [[#RetailInteractiveDisplayState]]
 
|-
 
|-
 
| 15 || [5.0.0+] [[#RegulatorType]]
 
| 15 || [5.0.0+] [[#RegulatorType]]
Line 776: Line 776:
 
This tells if the TI Charger (bq24192) is active.
 
This tells if the TI Charger (bq24192) is active.
  
−
===== QuestState =====
+
===== RetailInteractiveDisplayState =====
 
{| class=wikitable
 
{| class=wikitable
 
! Value || Description
 
! Value || Description

Revision as of 20:22, 29 February 2024

Secure Monitor Calls

The secure monitor provides two top level handlers of which each provides a range of sub handlers.

Secure Monitor calls follow the ARM SMC calling convention with a small change:

Bits Description
0-7 Function Number
8-15 Argument Type
16-23 Reserved
24-29 Call Range
30 Call Convention (0 = SMC32, 1 = SMC64)
31 Call Type (0 = Yielding Call, 1 = Fast Call)

If bit n is set in the argument type then parameter Xn is treated as a pointer and the kernel will setup address translation for it in svcCallSecureMonitor.

SMC arguments are passed using registers X0-X7 with X0 always sending the call sub-id and returning the result of the call.

FunctionId0

Functions exposed to user-mode processes using svcCallSecureMonitor. SMCs should be called from CPUID 3 (where SPL runs).

Value Name
0xC3000401 SetConfig
0xC3000002 GetConfig (same as in #FunctionId1)
0xC3000003 GetResult
0xC3000404 GetResultData
0xC3000E05 ModularExponentiate
0xC3000006 GenerateRandomBytes (same as in #FunctionId1)
0xC3000007 GenerateAesKek
0xC3000008 LoadAesKey
0xC3000009 ComputeAes
0xC300000A GenerateSpecificAesKey
0xC300040B ComputeCmac
[1.0.0-4.1.0] 0xC300100C DecryptAndImportEsDeviceKey
[5.0.0+] 0xC300D60C ReencryptDeviceUniqueData
0xC300100D DecryptDeviceUniqueData
[1.0.0-4.1.0] 0xC300100E DecryptAndImportLotusKey
0xC300060F ModularExponentiateByStorageKey
0xC3000610 PrepareEsDeviceUniqueKey
0xC3000011 LoadPreparedAesKey
0xC3000012 [2.0.0+] PrepareEsCommonKey

The overall concept here is the following:

  • All key material (AES and RSA) is stored in userspace, but it's encrypted with random AES kek's ("key encryption keys").
  • Each kek is generated as a function of an access key (picked at random).
  • The kek is generated differently depending on the #CryptoUsecase the key is used for.
    • This means: Each key is "locked" to the #CryptoUsecase it was designated for.
    • You can use a key for a different usecase, but you will only get garbage output.
  • After the kek has been generated, it is wrapped with a session-specific key and given back to userspace.
    • This means: Plaintext kek keys never leave TrustZone.
    • Further, this means: Actual AES/RSA keys never leave TrustZone.

GenerateRandomBytes

Takes an u64 Size. Returns #Result and RandomBytes.

Size is limited to 0x38 (for fitting in return registers).

GenerateAesKek

Takes an "access key" as input, an #CryptoUsecase.

Returns a session-unique kek for said usecase.

LoadAesKey

Takes a session kek created with #GenerateAesKek, and a wrapped AES key.

The session kek must have been created with CryptoUsecase Aes.

ComputeAes

Encrypts/decrypts using AES (CTR and CBC). Takes an #CipherMode.

Key must be set prior using one of the #LoadAesKey or #GenerateSpecificAesKey commands.

GenerateSpecificAesKey

Takes a wrapped AES key and decrypts it using static data.

ComputeCmac

Calculates CMAC over input data.

DecryptAndImportEsDeviceKey

Takes a session kek created with #GenerateAesKek, a wrapped AES key, and a wrapped RSA private key.

The session kek must have been created with CryptoUsecase TitleKey.

[5.0.0] This function was removed and replaced with #ReencryptDeviceUniqueData.

ReencryptDeviceUniqueData

Takes in two session keks created with #GenerateAesKek, two wrapped AES keys, an enum member, and a wrapped RSA private key.

Decrypts and validates the wrapped RSA private key with the first kek/wrapped key, and re-encrypts it with the second if valid.

The re-encrypted key is then passed to the user, for use with #DecryptDeviceUniqueData.

DecryptDeviceUniqueData

Takes a session kek created with #GenerateAesKek, a wrapped AES key, an enum member, and a wrapped RSA private key.

The session kek must have been created with CryptoUsecase RsaPrivate.

[4.0.0+] The SMC handler when certain conditions pass and FunctionId0==0xC300100D now returns error 0x6 instead of calling the handler funcptr.

[5.0.0+] This function now takes an additional input #DecryptOrImportMode. This extends the original functionality to enable importing private keys into the security engine instead of decrypting them.

DecryptAndImportLotusKey

Takes a session kek created with #GenerateAesKek, and a wrapped RSA key.

The session kek must have been created with CryptoUsecase RsaSecureExpMod.

[5.0.0] This function was removed.

ModularExponentiateByStorageKey

Performs an ExpMod operation using an exponent previously loaded with the #DecryptAndImportLotusKey command.

[5.0.0+] This now uses any exponent previously loaded with #DecryptDeviceUniqueData and takes an #SecureExpModMode.

PrepareEsDeviceUniqueKey

Takes an Rsa-Oaep-wrapped TitleKey, an RSA Public Key, and a label hash.

Performs an ExpMod operation using an exponent previously loaded with the #DecryptAndImportEsDeviceKey command, and then validates/extracts a Titlekey from the resulting message.

Returns a session-unique AES key especially for use in #LoadTitleKey.

[5.0.0+] This now uses any exponent previously loaded with #DecryptDeviceUniqueData.

LoadPreparedAesKey

Takes a session-unique AES key from #PrepareEsCommonKey or #PrepareEsDeviceUniqueKey.

PrepareEsCommonKey

Takes an AES-wrapped common TitleKey and returns a sealed AES key.

FunctionId1

Functions exposed to the kernel internally.

Value Name
0xC4000001 SuspendCpu
0x84000002 PowerOffCpu
0xC4000003 PowerOnCpu
0xC3000004 GetConfig (same as in #FunctionId0)
0xC3000005 GenerateRandomBytesNonBlocking
0xC3000006 ShowError
0xC3000007 [2.0.0+] SetKernelCarveoutRegion
0xC3000008 [2.0.0+] ReadWriteRegister

SuspendCpu

Takes an u64 PowerState, an u64 EntrypointAddress and an u64 ContextId. No output.

Suspends the CPU (CPU0).

The kernel calls this SMC on shutdown with PowerState set to 0x0201001B (power level: 0x02==system; power type: 0x01==powerdown; ID: 0x1B).

PowerOffCpu

No input/output.

Turns off the CPU (CPU1, CPU2 or CPU3).

PowerOnCpu

Takes an u64 TargetCpu, an u64 EntrypointAddress and an u64 ContextId. Returns #Result.

Turns on the CPU (CPU1, CPU2 or CPU3).

GetConfig

Takes a #ConfigItem. Returns #Result and a ConfigValue.

ConfigItem

Value Name
1 #DisableProgramVerification
2 #DramId
3 #SecurityEngineInterruptNumber
4 #FuseVersion
5 #HardwareType
6 #HardwareState
7 #IsRecoveryBoot
8 #DeviceId
9 [1.0.0-4.0.0] #BootReason
10 #MemoryMode
11 #IsDevelopmentFunctionEnabled
12 #KernelConfiguration
13 #IsChargerHiZModeEnabled
14 [4.0.0+] #RetailInteractiveDisplayState
15 [5.0.0+] #RegulatorType
16 [5.0.0+] #DeviceUniqueKeyGeneration
17 [5.0.0+] #Package2Hash
DisableProgramVerification

PM checks this item and if non-zero, calls fsp-pr SetEnabledProgramVerification(false).

DramId
Value Description
0 EristaIcosaSamsung4gb
1 EristaIcosaHynix4gb
2 EristaIcosaMicron4gb
3 [11.0.0+] MarikoIowaHynix1y4gb ([1.0.0-10.2.0] EristaCopperSamsung4gb)
4 EristaIcosaSamsung6gb
5 [12.0.0+] MarikoHoagHynix1y4gb ([4.0.0-11.0.1] EristaCopperHynix4gb)
6 [13.0.0+] MarikoAulaHynix1y4gb ([4.0.0-12.1.0] EristaCopperMicron4gb)
7 [15.0.0+] Reserved ([5.0.0-14.1.2] MarikoIowax1x2Samsung4gb, [4.0.0-4.1.0] Reserved)
8 [5.0.0+] MarikoIowaSamsung4gb
9 [5.0.0+] MarikoIowaSamsung8gb
10 [6.0.0+] MarikoIowaHynix4gb ([5.0.0-5.1.0] Reserved)
11 [7.0.0+] MarikoIowaMicron4gb ([5.0.0-6.2.0] Reserved)
12 [5.0.0+] MarikoHoagSamsung4gb
13 [5.0.0+] MarikoHoagSamsung8gb
14 [7.0.0+] MarikoHoagHynix4gb ([5.0.0-6.2.0] Reserved)
15 [7.0.0+] MarikoHoagMicron4gb ([5.0.0-6.2.0] Reserved)
16 [15.0.0+] Reserved ([8.0.0-14.1.2] MarikoIowaSamsung4gbY)
17 [9.0.0+] MarikoIowaSamsung1y4gbX
18 [9.0.0+] MarikoIowaSamsung1y8gbX
19 [9.0.0+] MarikoHoagSamsung1y4gbX
20 [14.0.0+] MarikoIowaSamsung1z4gb ([9.0.0-13.2.1] MarikoIowaSamsung1y4gbY)
21 [14.0.0+] MarikoHoagSamsung1z4gb ([9.0.0-13.2.1] MarikoIowaSamsung1y8gbY)
22 [14.0.0+] MarikoAulaSamsung1z4gb ([13.0.0-13.2.1] Reserved, [9.0.0-12.1.0] MarikoAulaSamsung1y4gb)
23 [10.0.0+] MarikoHoagSamsung1y8gbX
24 [10.0.0+] MarikoAulaSamsung1y4gbX
25 [11.0.0+] MarikoIowaMicron1y4gb
26 [11.0.0+] MarikoHoagMicron1y4gb
27 [11.0.0+] MarikoAulaMicron1y4gb
28 [11.0.0+] MarikoAulaSamsung1y8gbX
29 [16.0.0+] MarikoIowaHynix1a4gb ([15.0.0-15.0.1] MarikoIowax1x2Samsung4gb)
30 [16.0.0+] MarikoHoagHynix1a4gb ([15.0.0-15.0.1] MarikoHoagx1x2Samsung4gb)
31 [16.0.0+] MarikoAulaHynix1a4gb ([15.0.0-15.0.1] MarikoAulax1x2Samsung4gb)
32 [16.0.0+] MarikoIowaMicron1a4gb ([15.0.0-15.0.1] MarikoIowaSamsung4gbY)
33 [16.0.0+] MarikoHoagMicron1a4gb ([15.0.0-15.0.1] MarikoHoagSamsung4gbY)
34 [16.0.0+] MarikoAulaMicron1a4gb ([15.0.0-15.0.1] MarikoAulaSamsung4gbY)

This is extracted directly from FUSE_RESERVED_ODM4.

PCV selects memory training tables based on DramId.

SocType Platform DramId Revision DVFS
Erista jetson-tx1 N/A 0x07 
11_40800_01_V9.8.3_V1.6
11_68000_01_V9.8.3_V1.6
11_102000_01_V9.8.3_V1.6
11_204000_05_V9.8.3_V1.6
11_408000_02_V9.8.3_V1.6
11_665600_03_V9.8.3_V1.6
11_800000_01_V9.8.3_V1.6
11_1065600_01_V9.8.3_V1.6
11_1331200_01_V9.8.3_V1.6
11_1600000_02_V9.8.3_V1.6
Erista nx-abcb EristaIcosaSamsung4gb 0x07 
10_40800_NoCfgVersion_V9.8.7_V1.6
10_68000_NoCfgVersion_V9.8.7_V1.6
10_102000_NoCfgVersion_V9.8.7_V1.6
10_204000_NoCfgVersion_V9.8.7_V1.6
10_408000_NoCfgVersion_V9.8.7_V1.6
10_665600_NoCfgVersion_V9.8.7_V1.6
10_800000_NoCfgVersion_V9.8.7_V1.6
10_1065600_NoCfgVersion_V9.8.7_V1.6
10_1331200_NoCfgVersion_V9.8.7_V1.6
10_1600000_NoCfgVersion_V9.8.7_V1.6
Erista nx-abcb EristaIcosaMicron4gb 0x07 
10_40800_NoCfgVersion_V9.8.4_V1.6
10_68000_NoCfgVersion_V9.8.4_V1.6
10_102000_NoCfgVersion_V9.8.4_V1.6
10_204000_NoCfgVersion_V9.8.4_V1.6
10_408000_NoCfgVersion_V9.8.4_V1.6
10_665600_NoCfgVersion_V9.8.4_V1.6
10_800000_NoCfgVersion_V9.8.4_V1.6
10_1065600_NoCfgVersion_V9.8.4_V1.6
10_1331200_NoCfgVersion_V9.8.4_V1.6
10_1600000_NoCfgVersion_V9.8.4_V1.6
Erista nx-abcb EristaIcosaHynix4gb 0x07 
10_40800_NoCfgVersion_V9.8.4_V1.6
10_68000_NoCfgVersion_V9.8.4_V1.6
10_102000_NoCfgVersion_V9.8.4_V1.6
10_204000_NoCfgVersion_V9.8.4_V1.6
10_408000_NoCfgVersion_V9.8.4_V1.6
10_665600_NoCfgVersion_V9.8.4_V1.6
10_800000_NoCfgVersion_V9.8.4_V1.6
10_1065600_NoCfgVersion_V9.8.4_V1.6
10_1331200_NoCfgVersion_V9.8.4_V1.6
10_1600000_NoCfgVersion_V9.8.4_V1.6
Erista nx-abca2 EristaIcosaSamsung4gb, EristaIcosaMicron4gb 0x07 
10_40800_NoCfgVersion_V9.8.7_V1.6
10_68000_NoCfgVersion_V9.8.7_V1.6
10_102000_NoCfgVersion_V9.8.7_V1.6
10_204000_NoCfgVersion_V9.8.7_V1.6
10_408000_NoCfgVersion_V9.8.7_V1.6
10_665600_NoCfgVersion_V9.8.7_V1.6
10_800000_NoCfgVersion_V9.8.7_V1.6
10_1065600_NoCfgVersion_V9.8.7_V1.6
10_1331200_NoCfgVersion_V9.8.7_V1.6
10_1600000_NoCfgVersion_V9.8.7_V1.6
Erista nx-abca2 EristaIcosaHynix4gb 0x07 
10_40800_NoCfgVersion_V9.8.7_V1.6
10_68000_NoCfgVersion_V9.8.7_V1.6
10_102000_NoCfgVersion_V9.8.7_V1.6
10_204000_NoCfgVersion_V9.8.7_V1.6
10_408000_NoCfgVersion_V9.8.7_V1.6
10_665600_NoCfgVersion_V9.8.7_V1.6
10_800000_NoCfgVersion_V9.8.7_V1.6
10_1065600_NoCfgVersion_V9.8.7_V1.6
10_1331200_NoCfgVersion_V9.8.7_V1.6
10_1600000_NoCfgVersion_V9.8.7_V1.6
Erista nx-abca2 EristaIcosaSamsung6gb 0x07 
10_40800_NoCfgVersion_V9.8.7_V1.6
10_68000_NoCfgVersion_V9.8.7_V1.6
10_102000_NoCfgVersion_V9.8.7_V1.6
10_204000_NoCfgVersion_V9.8.7_V1.6
10_408000_NoCfgVersion_V9.8.7_V1.6
10_665600_NoCfgVersion_V9.8.7_V1.6
10_800000_NoCfgVersion_V9.8.7_V1.6
10_1065600_NoCfgVersion_V9.8.7_V1.6
10_1331200_NoCfgVersion_V9.8.7_V1.6
10_1600000_NoCfgVersion_V9.8.7_V1.6
Mariko nx-abca2, nx-abcb, nx-abcc, nx-abcd MarikoIowax1x2Samsung4gb 0x03 
01_204000_NoCfgVersion_V0.3.1_V2.0
01_1331200.0_NoCfgVersion_V0.3.1_V2.0
01_1600000_NoCfgVersion_V0.3.1_V2.0
Mariko nx-abca2, nx-abcb, nx-abcc, nx-abcd MarikoIowaSamsung4gb, MarikoHoagSamsung4gb 0x03 
01_204000_NoCfgVersion_V0.3.1_V2.0
01_1331200.0_NoCfgVersion_V0.3.1_V2.0
01_1600000_NoCfgVersion_V0.3.1_V2.0
Mariko nx-abca2, nx-abcb, nx-abcc, nx-abcd MarikoIowaSamsung8gb, MarikoHoagSamsung8gb 0x03 
01_204000_NoCfgVersion_V0.4.2_V2.0
01_1331200.0_NoCfgVersion_V0.4.2_V2.0
01_1600000_NoCfgVersion_V0.4.2_V2.0
Mariko nx-abca2, nx-abcb, nx-abcc, nx-abcd MarikoIowaHynix4gb, MarikoHoagHynix4gb 0x03 
01_204000_NoCfgVersion_V0.3.1_V2.0
01_1331200.0_NoCfgVersion_V0.3.1_V2.0
01_1600000_NoCfgVersion_V0.3.1_V2.0
Mariko nx-abca2, nx-abcb, nx-abcc, nx-abcd MarikoIowaMicron4gb, MarikoHoagMicron4gb 0x03 
01_204000_NoCfgVersion_V0.4.2_V2.0
01_1331200.0_NoCfgVersion_V0.4.2_V2.0
01_1600000_NoCfgVersion_V0.4.2_V2.0
Mariko nx-abca2, nx-abcb, nx-abcc, nx-abcd MarikoIowaSamsung4gbY 0x03 
01_204000_NoCfgVersion_V0.4.2_V2.0
01_1331200.0_NoCfgVersion_V0.4.2_V2.0
01_1600000_NoCfgVersion_V0.4.2_V2.0
Mariko nx-abca2, nx-abcb, nx-abcc, nx-abcd MarikoIowaSamsung1y4gbX 0x03 
01_204000_NoCfgVersion_V0.4.2_V2.0
01_1331200.0_NoCfgVersion_V0.4.2_V2.0
01_1600000_NoCfgVersion_V0.4.2_V2.0
Mariko nx-abca2, nx-abcb, nx-abcc, nx-abcd MarikoIowaSamsung1y8gbX 0x03 
01_204000_NoCfgVersion_V0.4.2_V2.0
01_1331200.0_NoCfgVersion_V0.4.2_V2.0
01_1600000_NoCfgVersion_V0.4.2_V2.0
Mariko nx-abca2, nx-abcb, nx-abcc, nx-abcd MarikoHoagSamsung1y4gbX 0x03 
01_204000_NoCfgVersion_V0.4.2_V2.0
01_1331200.0_NoCfgVersion_V0.4.2_V2.0
01_1600000_NoCfgVersion_V0.4.2_V2.0
Mariko nx-abca2, nx-abcb, nx-abcc, nx-abcd MarikoIowaSamsung1y4gbY 0x03 
01_204000_NoCfgVersion_V0.4.2_V2.0
01_1331200.0_NoCfgVersion_V0.4.2_V2.0
01_1600000_NoCfgVersion_V0.4.2_V2.0
Mariko nx-abca2, nx-abcb, nx-abcc, nx-abcd MarikoIowaSamsung1y8gbY 0x03 
01_204000_NoCfgVersion_V0.4.2_V2.0
01_1331200.0_NoCfgVersion_V0.4.2_V2.0
01_1600000_NoCfgVersion_V0.4.2_V2.0
Mariko nx-abca2, nx-abcb, nx-abcc, nx-abcd MarikoIowaSamsung1y4gbA 0x03 
01_204000_NoCfgVersion_V0.4.5_V2.0
01_1331200.0_NoCfgVersion_V0.4.5_V2.0
01_1600000_NoCfgVersion_V0.4.5_V2.0

nx-abca2 (Icosa in Erista, Iowa in Mariko) hardware types are variations of the retail, EDEV and SDEV form factors.

nx-abcb (Copper in Erista, Calcio in Mariko) is unreleased. Among other differences, this has extra hardware to support HDMI output.

[8.0.0+] nx-abcc (Hoag) was added for the Lite retail and HDEV form factors.

[10.0.0+] nx-abcd (Aula) was added for the OLED Model retail and ADEV form factors.

Erista memory is LPDDR4, while Mariko memory is LPDDR4X.

SecurityEngineInterruptNumber

SPL uses this for setting up the security engine IRQ.

FuseVersion

The current bootloader maximum version - 1.

HardwareType
Value Description
0 Icosa
1 Copper
2 [8.0.0+] Hoag ([1.0.0-7.0.1] Invalid)
3 [4.0.0+] Iowa
4 [8.0.0+] Calcio
5 [10.0.0+] Aula
15 Invalid

[1.0.0+] This item is obtained by checking bits 8 and 2 from FUSE_RESERVED_ODM4.

[4.0.0+] This item is obtained by checking bits 8, 2 and 16-19 from FUSE_RESERVED_ODM4.

[7.0.0+] This item can now only be 0 (Icosa) or 15 (Invalid) in Erista units.

Hardware is Icosa (Erista retail, EDEV and SDEV) if HardwareType1 (bit 2) is 1 and HardwareType2 (bit 8) is 0.

Hardware is Copper (unreleased Erista model) if HardwareType1 (bit 2) is 0 and HardwareType2 (bit 8) is 1.

[4.0.0+] Hardware is Iowa (Mariko retail, EDEV and SDEV) if HardwareType3 (bits 16-19) is 1.

[8.0.0+] Hardware is Hoag (Mariko Lite retail and HDEV) if HardwareType3 (bits 16-19) is 2.

[8.0.0+] Hardware is Calcio (unreleased Mariko model) if HardwareType1 (bit 2) is 0 and HardwareType2 (bit 8) is 1.

[10.0.0+] Hardware is Aula (Mariko OLED Model retail and ADEV) if HardwareType3 (bits 16-19) is 4.

HardwareState
Value Description
0 Development
1 Production
2 Invalid

This item is obtained by checking bits 9 and 0-1 from FUSE_RESERVED_ODM4.

Hardware is Development if HardwareState1 (bits 0-1) is 3 and HardwareState2 (bit 9) is 0.

Hardware is Production if HardwareState1 (bits 0-1) is 0 and HardwareState2 (bit 9) is 1.

IsRecoveryBoot

Used to determine if the system is booting from SafeMode firmware.

Under normal circumstances, this just returns bit 0 of the active bootloader info's attribute field.

DeviceId

NIM checks if this item matches the set:cal DeviceId with byte7 cleared. If they don't match, a panic is thrown.

BootReason
Value Description
0 Invalid
1 AcOk
2 OnKey
3 RtcAlarm1
4 RtcAlarm2

Used to determine how the system booted.

MemoryMode
Bits Description
0-3 Purpose (0 = None, 1 = ForStandard, 2 = ForAppletDev, 3 = ForSystemDev)
4-7 Size (0 = 4GB, 1 = 6GB, 2 = 8GB)

PM and the kernel decide memory arrangement based on MemoryMode.

MemoryArrange MemoryMode Description
0 0x01 Standard
1 0x02 StandardForAppletDev
2 0x03 StandardForSystemDev
3 0x11 Expanded
4 0x12 ExpandedForAppletDev
5 0x21 ExpandedForMarikoDev
IsDevelopmentFunctionEnabled

Kernel uses this to determine behavior of svcBreak positive arguments. It will break instead of just force-exiting the process which is what happens on retail.

[2.0.0+] This is also used with certain debug SVCs.

[3.0.0+] RO checks this and if set then skipping NRR rsa signatures is allowed.

KernelConfiguration
Bits Description
0 EnableNonZeroFillMemory
1 EnableUserExceptionHandler
2 EnablePmuAccess
3 [8.0.0+] EnableExtraThreadResourceAllocation
4 [13.0.0+] DisableDynamicSystemResourceAllocation
8 CallShowErrorOnPanic
16-17 MemorySize

Kernel reads this when setting up memory-related code.

EnableNonZeroFillMemory is a boolean determining whether kernel should it will memset various allocated memory-regions with 0x58, 0x59, 0x5A ('X', 'Y', 'Z') instead of zero. This allows Nintendo devs to find uninitialized memory bugs.

EnableUserExceptionHandler is a boolean determining whether kernel should forcefully enable usermode exception handlers (when false, only certain aborts (((1LL << (esr >> 26)) & 0x1115804400224001) == 0, typically data/prefetch aborts) that occur when the faulting address is in a readable region with MemoryType_CodeStatic will trigger usermode exception handlers).

EnablePmuAccess is a boolean determining whether kernel should enable usermode access to the Performance Monitors (whether PMUSERENR_EL0 should be 1 or 0).

EnableExtraThreadResourceAllocation is a boolean determining whether the kernel should increase the KThread slabheap capacity by 160. This also increases object capacities that are calculated based on number of threads.

CallShowErrorOnPanic is a boolean determining whether kernel should call smcPanic on error instead of infinite-looping.

MemorySize determines how much memory is available. 00/03 = 4 GB, 01 = 6 GB, 02 = 8 GB.

IsChargerHiZModeEnabled

This tells if the TI Charger (bq24192) is active.

RetailInteractiveDisplayState
Value Description
0 Disabled
1 Enabled

This item is bit 10 from FUSE_RESERVED_ODM4.

[4.0.0+] Settings uses this value to overwrite the quest flag from GetQuestFlag. This is used to detect if a Switch is a kiosk unit for display at retail stores.

RegulatorType
Value SocType GPU Power Blocks
0 Erista GM20B (0x12B) max77620_sd0, max77621_cpu and max77621_gpu
1 Mariko GM20B_B (0x12E) max77620_sd0, max77812_cpu and max77812_gpu
2 Mariko GM20B_B (0x12E) max77620_sd0, max77812_cpu and max77812_gpu

[5.0.0+] PCV uses this value in combination with HardwareType to configure power blocks and memory tables for different hardware.

DeviceUniqueKeyGeneration

This item is obtained from FUSE_RESERVED_ODM2 if bit 11 from FUSE_RESERVED_ODM4 is set, FUSE_RESERVED_ODM0 matches 0x8E61ECAE and FUSE_RESERVED_ODM1 matches 0xF2BA3BB2.

[5.0.0+] FS can now use this value for the KeyGeneration parameter when calling GenerateAesKek during "GetBisEncryptionKey".

Package2Hash

This is a SHA-256 hash calculated over the package2 image. Since the hash calculation is an optional step in pkg2ldr, this item is only valid in recovery mode. Otherwise, an error is returned instead.

ShowError

Takes an u32 Color and issues a system panic.

The kernel always calls this with Color set to 0xF00.

SetKernelCarveoutRegion

Takes an u64 Index, an u64 Address and an u64 Size. Returns #Result.

If Index is 0, Address and Size are used to configure MC_SECURITY_CARVEOUT4. If Index is 1, Address and Size are used to configure MC_SECURITY_CARVEOUT5. Any other Index values are invalid.

The kernel calls this with Index set to 0, Address set to 0x80060000 and Size set to a dynamically calculated size which covers all the kernel and built-in sysmodules' DRAM regions.

ReadWriteRegister

Takes an u64 Register, an u32 Mask and an u32 InValue. Returns #Result and an u32 OutValue.

Relays svcReadWriteRegister to the Secure Monitor.

CryptoUsecase

Value Name
0 Aes
1 RsaPrivate
2 SecureExpMod
3 RsaOaep
4 [5.0.0+] RsaImport
5 [5.0.0+]
6 [5.0.0+]

CipherMode

Value Name
0 CbcEncrypt
1 CbcDecrypt
2 Ctr

DecryptOrImportMode

Value Name
0 DecryptRsaPrivateKey
1 ImportLotusKey
2 ImportEsKey
3 ImportSslKey
4 ImportDrmKey

SecureExpModMode

Value Name
0 Lotus
1 Ssl
2 Drm

EsKeyType

Value Name
0 TitleKey
1 ElicenseKey

Result

Value Description
0 Success
1 Not implemented
2 Invalid argument
3 In progress
4 No async operation
5 Invalid async operation
6 [8.0.0+] Not permitted
Retrieved from "https://switchbrew.org/w/index.php?title=Secure_Monitor&oldid=12647"