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== GetConfig ==
 
== GetConfig ==
Takes a u32 ('''ConfigItem'''), and returns a u64 ('''ConfigVal''').
+
Takes a u32 ('''ConfigItem'''), and returns one or more u64s ('''ConfigVal''').
    
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
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! ConfigItem || Name
 
! ConfigItem || Name
 
|-
 
|-
| 1 || DisableProgramVerification
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| 1 || [[#DisableProgramVerification]]
 
|-
 
|-
| 2 || MemoryConfiguration
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| 2 || [[#DRAMId]]
 
|-
 
|-
| 3 || SecurityEngineIRQNumber
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| 3 || [[#SecurityEngineIRQNumber]]
 
|-
 
|-
| 4 || Version (returns the current [[Package2#Versions|Package1 Maxver Constant]] - 1).
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| 4 || [[#Version]]
 
|-
 
|-
| 5 || HardwareType (0=Icosa (nx-abca2), 1=Copper (nx-abcb))
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| 5 || [[#HardwareType]]
 
|-
 
|-
| 6 || IsRetail
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| 6 || [[#IsRetail]]
 
|-
 
|-
| 7 || IsRecoveryBoot
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| 7 || [[#IsRecoveryBoot]]
 
|-
 
|-
| 8 || DeviceId (byte7 clear)
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| 8 || [[#DeviceId]]
 
|-
 
|-
| 9 || BootReason
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| 9 || [1.0.0-4.0.0] BootReason
 
|-
 
|-
 
| 10 || MemoryArrange
 
| 10 || MemoryArrange
 
|-
 
|-
| 11 || IsDebugMode
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| 11 || [[#IsDebugMode]]
 
|-
 
|-
| 12 || KernelMemoryConfiguration
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| 12 || [[#KernelMemoryConfiguration]]
 
|-
 
|-
| 13 || BatteryProfile
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| 13 || [[#BatteryProfile]]
 
|-
 
|-
| 14 || [4.0.0+] FUSE_RESERVED_ODM4 bit 10
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| 14 || [4.0.0+] [[#Unknown0]]
 
|-
 
|-
| 15 || [5.0.0+] Always 0
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| 15 || [5.0.0+] Unknown1
 
|-
 
|-
| 16 || [5.0.0+] IsNewSoc?
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| 16 || [5.0.0+] [[#IsT214]]
 
|-
 
|-
| 17 || [5.0.0+] Package2Meta
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| 17 || [5.0.0+] [[#Package2Hash]]
 
|}
 
|}
   −
[[Process Manager services|PM]] checks id1 and if non-zero, calls fsp-pr SetEnabledProgramVerification(false).
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=== DisableProgramVerification ===
 +
[[Process Manager services|PM]] checks this item and if non-zero, calls fsp-pr SetEnabledProgramVerification(false).
   −
[[PCV_services|PCV]] configures memory profiles based on id2.
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=== DRAMId ===
 +
This is extracted directly from [[Fuse_registers#FUSE_RESERVED_ODM4|FUSE_RESERVED_ODM4]].
 +
 
 +
[[PCV_services|PCV]] configures memory profiles based on DRAMId.
 
{| class="wikitable" border="1"
 
{| class="wikitable" border="1"
 
|-
 
|-
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!  Version @ 40800
 
!  Version @ 40800
 
!  Revision
 
!  Revision
id2
+
DRAMId
 
|-
 
|-
 
|  jetson-tx1
 
|  jetson-tx1
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|}
 
|}
   −
=== Hardware Types ===
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nx-abcb (Copper) is the SDEV unit. Among other differences, this has extra hardware to support HDMI output.
 +
 
 +
nx-abca2 (Icosa) hardware types are variations of the retail form factor.
 +
 
 +
=== SecurityEngineIRQNumber ===
 +
SPL uses this for setting up the security engine IRQ.
 +
 
 +
=== Version ===
 +
The current [[Package2#Versions|Package1 Maxver Constant]] - 1.
 +
 
 +
=== HardwareType ===
 +
[1.0.0+] This item is obtained by checking bits 8 and 2 from [[Fuse_registers#FUSE_RESERVED_ODM4|FUSE_RESERVED_ODM4]]. It can be 0 (Icosa), 1 (Copper) or 3 (Invalid).
 +
 
 +
[4.0.0+] This item is obtained by checking bits 8, 2 and 16-19 from [[Fuse_registers#FUSE_RESERVED_ODM4|FUSE_RESERVED_ODM4]]. It can be 0 (Icosa), 1 (Copper), 3 (Unknown) or 4 (Invalid).
 +
 
 +
A value of 2 (Hoag?) is always mapped to 4 (Invalid).
 +
 
 +
=== IsRetail ===
 +
This item is obtained by checking bits 9 and 0-1 from [[Fuse_registers#FUSE_RESERVED_ODM4|FUSE_RESERVED_ODM4]]. It can be 0 (Debug), 1 (Retail) or 2 (Invalid).
 +
 
 +
=== IsRecoveryBoot ===
 +
Used to determine if the system is booting from SafeMode firmware.
 +
 
 +
=== DeviceId ===
 +
[[NIM_services|NIM]] checks if this item matches the [[Settings_services|set:cal]] DeviceId with byte7 cleared. If they don't match, a panic is thrown.
 +
 
 +
=== IsDebugMode ===
 +
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.
   −
nx-abcb is the SDEV unit. Among other differences, this has extra hardware to support HDMI output.
+
[2.0.0+] This is also used with certain debug [[SVC|SVCs]].
   −
nx-abca2 hardware types are variations of the retail form factor.
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[3.0.0+] [[Loader services|RO]] checks this and if set then skipping NRR rsa signatures is allowed.
   −
=== Notes ===
+
=== KernelMemoryConfiguration ===
 +
Kernel reads this when setting up memory-related code. If bit0 is set, 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. If bit17-16 is 0b01, the kernel assumes 6GB of DRAM instead of 4GB.
   −
SPL uses id3 for setting up the security engine IRQ.
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=== BatteryProfile ===
 +
This tells if the TI Charger (bq24192) is active.
   −
[[NIM_services|NIM]] checks that id8 output must match the [[Settings_services|set:cal]] DeviceId with byte7 cleared, otherwise panic.
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=== IsT214 ===
 +
This item is obtained from [[Fuse_registers#FUSE_RESERVED_ODM2|FUSE_RESERVED_ODM2]] if bit 11 from [[Fuse_registers#FUSE_RESERVED_ODM4|FUSE_RESERVED_ODM4]] is set, [[Fuse_registers#FUSE_RESERVED_ODM0|FUSE_RESERVED_ODM0]] matches 0x8E61ECAE and [[Fuse_registers#FUSE_RESERVED_ODM1|FUSE_RESERVED_ODM1]] matches 0xF2BA3BB2.
   −
[3.0.0+] [[Loader services|RO]] checks id11, if set then skipping NRR rsa signatures is allowed.
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This is speculated to be related to the new SoC T214.
   −
Kernel uses id11 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 [[SVC|SVCs]].
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=== Unknown0 ===
 +
This item is bit 10 from [[Fuse_registers#FUSE_RESERVED_ODM4|FUSE_RESERVED_ODM4]].
   −
Kernel reads id12 when setting up memory-related code. If bit0 is set, 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. If bit17-16 is 0b01, the kernel assumes 6GB of DRAM instead of 4GB.
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=== Package2Hash ===
 +
This is a SHA-256 hash calculated over the [[Package2|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.
    
== UserExpMod ==
 
== UserExpMod ==

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