The Nintendo Switch uses the Tegra's fuse driver for accessing one time programmable data.

Registers

The fuse driver is mapped to physical address 0x7000F800 with a total size of 0x400 bytes and exposes several registers for fuse programming.

Erista

Registers from 0x7000F800 to 0x7000F800 + 0xFC represent the actual fuse driver which can be used to directly program the hardware fuse bitmap.

Registers from 0x7000F800 + 0x100 (FUSE_CHIP_REG_START_OFFSET) to 0x7000F800 + 0x3FC (FUSE_CHIP_REG_END_OFFSET) represent the fuse cache which holds the sensed values of certain fuses.

Driver

Name	Address
FUSE_FUSECTRL	0x7000F800
FUSE_FUSEADDR	0x7000F804
FUSE_FUSERDATA	0x7000F808
FUSE_FUSEWDATA	0x7000F80C
FUSE_FUSETIME_RD1	0x7000F810
FUSE_FUSETIME_RD2	0x7000F814
FUSE_FUSETIME_PGM1	0x7000F818
FUSE_FUSETIME_PGM2	0x7000F81C
FUSE_PRIV2INTFC_START	0x7000F820
FUSE_FUSEBYPASS	0x7000F824
FUSE_PRIVATEKEYDISABLE	0x7000F828
FUSE_DISABLEREGPROGRAM	0x7000F82C
FUSE_WRITE_ACCESS_SW	0x7000F830
FUSE_PRIV2RESHIFT	0x7000F83C
FUSE_FUSETIME_RD3	0x7000F84C
FUSE_PRIVATE_KEY0_NONZERO	0x7000F880
FUSE_PRIVATE_KEY1_NONZERO	0x7000F884
FUSE_PRIVATE_KEY2_NONZERO	0x7000F888
FUSE_PRIVATE_KEY3_NONZERO	0x7000F88C
FUSE_PRIVATE_KEY4_NONZERO	0x7000F890

FUSE_FUSECTRL

Bits	Description
0-1	FUSE_FUSECTRL_CMD 0x00: IDLE 0x01: READ 0x02: WRITE 0x03: SENSE_CTRL
16-20	FUSE_FUSECTRL_STATE 0x00: STATE_RESET 0x01: STATE_POST_RESET 0x02: STATE_LOAD_ROW0 0x03: STATE_LOAD_ROW1 0x04: STATE_IDLE 0x05: STATE_READ_SETUP 0x06: STATE_READ_STROBE 0x07: STATE_SAMPLE_FUSES 0x08: STATE_READ_HOLD 0x09: STATE_FUSE_SRC_SETUP 0x0A: STATE_WRITE_SETUP 0x0B: STATE_WRITE_ADDR_SETUP 0x0C: STATE_WRITE_PROGRAM 0x0D: STATE_WRITE_ADDR_HOLD 0x0E: STATE_FUSE_SRC_HOLD 0x0F: STATE_LOAD_RIR 0x10: STATE_READ_BEFORE_WRITE_SETUP 0x11: STATE_READ_DEASSERT_PD
21	FUSE_FUSECTRL_MARGIN_READ
22	FUSE_FUSECTRL_RWL
23	FUSE_FUSECTRL_TRCS
24	FUSE_FUSECTRL_AT1
25	FUSE_FUSECTRL_AT0
26	FUSE_FUSECTRL_PD_CTRL
30	FUSE_FUSECTRL_FUSE_SENSE_DONE
31	FUSE_FUSECTRL_RECORD_SHIFT_DONE

FUSE_FUSECTRL_CMD takes the fuse controller's operation mode. READ and WRITE interact directly with the hardware fuse bitmap while SENSE_CTRL flushes programmed values into the cache registers.

FUSE_FUSECTRL_STATE returns the current state of the fuse controller.

FUSE_FUSECTRL_MARGIN_READ changes the fuse read trip point setting to margin read mode.

FUSE_FUSECTRL_RWL allows accessing the RIR (redundant information row).

FUSE_FUSECTRL_TRCS allows accessing the TRCS (test rows and columns).

FUSE_FUSECTRL_AT1 selects the TRCS test column (always 0).

FUSE_FUSECTRL_AT0 selects the TRCS test row (0 or 1).

FUSE_FUSECTRL_PD_CTRL controls the fuse macro's power down mode.

FUSE_FUSECTRL_FUSE_SENSE_DONE is set if fuse sensing is completed.

FUSE_FUSECTRL_RECORD_SHIFT_DONE is set if record shifting is completed.

FUSE_FUSEADDR

Bits	Description
0-7	FUSE_FUSEADDR_VLDFLD

Takes the address of the fuse to be read/written/sensed.

FUSE_FUSERDATA

Bits	Description
0-31	FUSE_FUSERDATA_DATA

Returns the value read from the fuse.

FUSE_FUSEWDATA

Bits	Description
0-31	FUSE_FUSEWDATA_DATA

Takes the value to be written to the fuse.

FUSE_FUSETIME_RD1

Bits	Description
0-7	FUSE_FUSETIME_RD1_TSUR_MAX
8-15	FUSE_FUSETIME_RD1_TSUR_FUSEOUT
16-23	FUSE_FUSETIME_RD1_THR_MAX

FUSE_FUSETIME_RD1_TSUR_MAX takes the maximum time for STATE_READ_SETUP.

FUSE_FUSETIME_RD1_TSUR_FUSEOUT takes the time to spend on STATE_SAMPLE_FUSES.

FUSE_FUSETIME_RD1_THR_MAX takes the maximum time for STATE_READ_HOLD.

FUSE_FUSETIME_RD2

Bits	Description
0-15	FUSE_FUSETIME_RD2_TWIDTH_RD

Takes the read strobe pulse width used during STATE_READ_STROBE.

FUSE_FUSETIME_PGM1

Bits	Description
0-7	FUSE_FUSETIME_PGM1_TSUP_MAX
8-15	FUSE_FUSETIME_PGM1_TSUP_ADDR
16-23	FUSE_FUSETIME_PGM1_THP_ADDR
24-31	FUSE_FUSETIME_PGM1_THP_PS

FUSE_FUSETIME_PGM1_TSUP_MAX takes the maximum time for STATE_WRITE_SETUP.

FUSE_FUSETIME_PGM1_TSUP_ADDR takes the time to spend on STATE_WRITE_ADDR_SETUP.

FUSE_FUSETIME_PGM1_THP_ADDR takes the time to spend on STATE_WRITE_ADDR_HOLD.

FUSE_FUSETIME_PGM1_THP_PS takes the time to spend on STATE_FUSE_SRC_HOLD.

FUSE_FUSETIME_PGM2

Bits	Description
0-15	FUSE_FUSETIME_PGM2_TWIDTH_PGM
16-23	FUSE_FUSETIME_PGM2_TSUP_PS
24-31	FUSE_FUSETIME_PGM2_THP_CSPS

FUSE_FUSETIME_PGM2_TWIDTH_PGM takes the program strobe pulse width used during STATE_WRITE_PROGRAM.

FUSE_FUSETIME_PGM2_TSUP_PS takes the time to spend on STATE_FUSE_SRC_SETUP.

FUSE_FUSETIME_PGM2_THP_CSPS takes the time to spend on STATE_READ_BEFORE_WRITE_SETUP.

FUSE_PRIV2INTFC_START

Bits	Description
0	FUSE_PRIV2INTFC_START_DATA
1	FUSE_PRIV2INTFC_SKIP_RECORDS

Controls the interface between the internal fuse chip (INTFC) and the fuse cache registers (PRIV).

FUSE_FUSEBYPASS

Bits	Description
0	FUSE_FUSEBYPASS_VAL

If set, this register enables fuse bypass mode. This is only available in hardware where the production_mode fuse remains unburnt.

FUSE_PRIVATEKEYDISABLE

Bits	Description
0	FUSE_PRIVATEKEYDISABLE_VAL
4	FUSE_PRIVATEKEYDISABLE_TZ_STICKY_BIT_VAL

If set, this register hides the private_key fuses until the next reset.

FUSE_DISABLEREGPROGRAM

Bits	Description
0	FUSE_DISABLEREGPROGRAM_VAL

If set, this register disables fuse programming until the next reset.

FUSE_WRITE_ACCESS_SW

Bits	Description
0	FUSE_WRITE_ACCESS_SW_CTRL
16	FUSE_WRITE_ACCESS_SW_STATUS

Controls and returns the status of software writes to the fuse cache registers.

FUSE_PRIV2RESHIFT

Bits	Description
0	FUSE_PRIV2RESHIFT_TRIGENABLE_VAL
1	FUSE_PRIV2RESHIFT_TRIG_1_FCPU0_VAL
2	FUSE_PRIV2RESHIFT_TRIG_1_FCPU1_VAL
3	FUSE_PRIV2RESHIFT_TRIG_1_FCPU2_VAL
4	FUSE_PRIV2RESHIFT_TRIG_1_FCPU3_VAL
5	FUSE_PRIV2RESHIFT_TRIG_1_FL2_TBANK0_VAL
6	FUSE_PRIV2RESHIFT_TRIG_1_FL2_TBANK1_VAL
7	FUSE_PRIV2RESHIFT_TRIG_1_FL2_TBANK2_VAL
8	FUSE_PRIV2RESHIFT_TRIG_1_FL2_TBANK3_VAL
9	FUSE_PRIV2RESHIFT_TRIG_1_SCPU_VAL
10	FUSE_PRIV2RESHIFT_TRIG_1_SL2_TBANK_VAL
11	FUSE_PRIV2RESHIFT_STATUS_1_FCPU0_VAL
12	FUSE_PRIV2RESHIFT_STATUS_1_FCPU1_VAL
13	FUSE_PRIV2RESHIFT_STATUS_1_FCPU2_VAL
14	FUSE_PRIV2RESHIFT_STATUS_1_FCPU3_VAL
15	FUSE_PRIV2RESHIFT_STATUS_1_FL2_TBANK0_VAL
16	FUSE_PRIV2RESHIFT_STATUS_1_FL2_TBANK1_VAL
17	FUSE_PRIV2RESHIFT_STATUS_1_FL2_TBANK2_VAL
18	FUSE_PRIV2RESHIFT_STATUS_1_FL2_TBANK3_VAL
19	FUSE_PRIV2RESHIFT_STATUS_1_SCPU_VAL
20	FUSE_PRIV2RESHIFT_STATUS_1_SL2_TBANK_VAL

Controls and returns the status of the record shift (RESHIFT) hardware block used for RAM re-repair.

FUSE_FUSETIME_RD3

Bits	Description
0-15	FUSE_FUSETIME_RD3_TSUR_PDCS

Takes the time to spend on STATE_READ_DEASSERT_PD.

FUSE_PRIVATE_KEY0_NONZERO

Bits	Description
0	FUSE_PRIVATE_KEY0_NONZERO_DATA

Returns whether private_key0 is empty or not.

FUSE_PRIVATE_KEY1_NONZERO

Bits	Description
0	FUSE_PRIVATE_KEY1_NONZERO_DATA

Returns whether private_key1 is empty or not.

FUSE_PRIVATE_KEY2_NONZERO

Bits	Description
0	FUSE_PRIVATE_KEY2_NONZERO_DATA

Returns whether private_key2 is empty or not.

FUSE_PRIVATE_KEY3_NONZERO

Bits	Description
0	FUSE_PRIVATE_KEY3_NONZERO_DATA

Returns whether private_key3 is empty or not.

FUSE_PRIVATE_KEY4_NONZERO

Bits	Description
0	FUSE_PRIVATE_KEY4_NONZERO_DATA

Returns whether private_key4 is empty or not.

Cache

Name	Address
FUSE_PRODUCTION_MODE	0x7000F900
FUSE_JTAG_SECUREID_VALID	0x7000F904
FUSE_ODM_LOCK	0x7000F908
FUSE_OPT_OPENGL_EN	0x7000F90C
FUSE_SKU_INFO	0x7000F910
FUSE_CPU_SPEEDO_0_CALIB	0x7000F914
FUSE_CPU_IDDQ_CALIB	0x7000F918
FUSE_OPT_FT_REV	0x7000F928
FUSE_CPU_SPEEDO_1_CALIB	0x7000F92C
FUSE_CPU_SPEEDO_2_CALIB	0x7000F930
FUSE_SOC_SPEEDO_0_CALIB	0x7000F934
FUSE_SOC_SPEEDO_1_CALIB	0x7000F938
FUSE_SOC_SPEEDO_2_CALIB	0x7000F93C
FUSE_SOC_IDDQ_CALIB	0x7000F940
FUSE_FA	0x7000F948
FUSE_RESERVED_PRODUCTION	0x7000F94C
FUSE_HDMI_LANE0_CALIB	0x7000F950
FUSE_HDMI_LANE1_CALIB	0x7000F954
FUSE_HDMI_LANE2_CALIB	0x7000F958
FUSE_HDMI_LANE3_CALIB	0x7000F95C
FUSE_ENCRYPTION_RATE	0x7000F960
FUSE_PUBLIC_KEY0	0x7000F964
FUSE_PUBLIC_KEY1	0x7000F968
FUSE_PUBLIC_KEY2	0x7000F96C
FUSE_PUBLIC_KEY3	0x7000F970
FUSE_PUBLIC_KEY4	0x7000F974
FUSE_PUBLIC_KEY5	0x7000F978
FUSE_PUBLIC_KEY6	0x7000F97C
FUSE_PUBLIC_KEY7	0x7000F980
FUSE_TSENSOR1_CALIB	0x7000F984
FUSE_TSENSOR2_CALIB	0x7000F988
FUSE_OPT_CP_REV	0x7000F990
FUSE_OPT_PFG	0x7000F994
FUSE_TSENSOR0_CALIB	0x7000F998
FUSE_FIRST_BOOTROM_PATCH_SIZE	0x7000F99C
FUSE_SECURITY_MODE	0x7000F9A0
FUSE_PRIVATE_KEY0	0x7000F9A4
FUSE_PRIVATE_KEY1	0x7000F9A8
FUSE_PRIVATE_KEY2	0x7000F9AC
FUSE_PRIVATE_KEY3	0x7000F9B0
FUSE_PRIVATE_KEY4	0x7000F9B4
FUSE_ARM_JTAG_DIS	0x7000F9B8
FUSE_BOOT_DEVICE_INFO	0x7000F9BC
FUSE_RESERVED_SW	0x7000F9C0
FUSE_OPT_VP9_DISABLE	0x7000F9C4
FUSE_RESERVED_ODM0	0x7000F9C8
FUSE_RESERVED_ODM1	0x7000F9CC
FUSE_RESERVED_ODM2	0x7000F9D0
FUSE_RESERVED_ODM3	0x7000F9D4
FUSE_RESERVED_ODM4	0x7000F9D8
FUSE_RESERVED_ODM5	0x7000F9DC
FUSE_RESERVED_ODM6	0x7000F9E0
FUSE_RESERVED_ODM7	0x7000F9E4
FUSE_OBS_DIS	0x7000F9E8
FUSE_USB_CALIB	0x7000F9F0
FUSE_SKU_DIRECT_CONFIG	0x7000F9F4
FUSE_KFUSE_PRIVKEY_CTRL	0x7000F9F8
FUSE_PACKAGE_INFO	0x7000F9FC
FUSE_OPT_VENDOR_CODE	0x7000FA00
FUSE_OPT_FAB_CODE	0x7000FA04
FUSE_OPT_LOT_CODE_0	0x7000FA08
FUSE_OPT_LOT_CODE_1	0x7000FA0C
FUSE_OPT_WAFER_ID	0x7000FA10
FUSE_OPT_X_COORDINATE	0x7000FA14
FUSE_OPT_Y_COORDINATE	0x7000FA18
FUSE_OPT_SEC_DEBUG_EN	0x7000FA1C
FUSE_OPT_OPS_RESERVED	0x7000FA20
FUSE_SATA_CALIB	0x7000FA24
FUSE_GPU_IDDQ_CALIB	0x7000FA28
FUSE_TSENSOR3_CALIB	0x7000FA2C
FUSE_CLOCK_BOUNDOUT0	0x7000FA30
FUSE_CLOCK_BOUNDOUT1	0x7000FA34
FUSE_OPT_SAMPLE_TYPE	0x7000FA44
FUSE_OPT_SUBREVISION	0x7000FA48
FUSE_OPT_SW_RESERVED_0	0x7000FA4C
FUSE_OPT_SW_RESERVED_1	0x7000FA50
FUSE_TSENSOR4_CALIB	0x7000FA54
FUSE_TSENSOR5_CALIB	0x7000FA58
FUSE_TSENSOR6_CALIB	0x7000FA5C
FUSE_TSENSOR7_CALIB	0x7000FA60
FUSE_OPT_PRIV_SEC_DIS	0x7000FA64
FUSE_PKC_DISABLE	0x7000FA68
FUSE_FUSE2TSEC_DEBUG_DISABLE	0x7000FA7C
FUSE_TSENSOR_COMMON	0x7000FA80
FUSE_OPT_CP_BIN	0x7000FA84
FUSE_OPT_GPU_DISABLE	0x7000FA88
FUSE_OPT_FT_BIN	0x7000FA8C
FUSE_OPT_DONE_MAP	0x7000FA90
FUSE_APB2JTAG_DISABLE	0x7000FA98
FUSE_ODM_INFO	0x7000FA9C
FUSE_ARM_CRYPT_DE_FEATURE	0x7000FAA8
FUSE_WOA_SKU_FLAG	0x7000FAC0
FUSE_ECO_RESERVE_1	0x7000FAC4
FUSE_GCPLEX_CONFIG_FUSE	0x7000FAC8
FUSE_PRODUCTION_MONTH	0x7000FACC
FUSE_RAM_REPAIR_INDICATOR	0x7000FAD0
FUSE_TSENSOR9_CALIB	0x7000FAD4
FUSE_VMIN_CALIBRATION	0x7000FADC
FUSE_AGING_SENSOR_CALIBRATION	0x7000FAE0
FUSE_DEBUG_AUTHENTICATION	0x7000FAE4
FUSE_SECURE_PROVISION_INDEX	0x7000FAE8
FUSE_SECURE_PROVISION_INFO	0x7000FAEC
FUSE_OPT_GPU_DISABLE_CP1	0x7000FAF0
FUSE_SPARE_ENDIS	0x7000FAF4
FUSE_ECO_RESERVE_0	0x7000FAF8
FUSE_RESERVED_CALIB0	0x7000FB04
FUSE_RESERVED_CALIB1	0x7000FB08
FUSE_OPT_GPU_TPC0_DISABLE	0x7000FB0C
FUSE_OPT_GPU_TPC0_DISABLE_CP1	0x7000FB10
FUSE_OPT_CPU_DISABLE	0x7000FB14
FUSE_OPT_CPU_DISABLE_CP1	0x7000FB18
FUSE_TSENSOR10_CALIB	0x7000FB1C
FUSE_TSENSOR10_CALIB_AUX	0x7000FB20
FUSE_OPT_RAM_SVOP_DP	0x7000FB24
FUSE_OPT_RAM_SVOP_PDP	0x7000FB28
FUSE_OPT_RAM_SVOP_REG	0x7000FB2C
FUSE_OPT_RAM_SVOP_SP	0x7000FB30
FUSE_OPT_RAM_SVOP_SMPDP	0x7000FB34
FUSE_OPT_GPU_TPC0_DISABLE_CP2	0x7000FB38
FUSE_OPT_GPU_TPC1_DISABLE	0x7000FB3C
FUSE_OPT_GPU_TPC1_DISABLE_CP1	0x7000FB40
FUSE_OPT_GPU_TPC1_DISABLE_CP2	0x7000FB44
FUSE_OPT_CPU_DISABLE_CP2	0x7000FB48
FUSE_OPT_GPU_DISABLE_CP2	0x7000FB4C
FUSE_USB_CALIB_EXT	0x7000FB50
FUSE_RESERVED_FIELD	0x7000FB54
FUSE_SPARE_REALIGNMENT_REG	0x7000FB7C
FUSE_SPARE_BIT_0	0x7000FB80
FUSE_SPARE_BIT_1	0x7000FB84
FUSE_SPARE_BIT_2	0x7000FB88
FUSE_SPARE_BIT_3	0x7000FB8C
FUSE_SPARE_BIT_4	0x7000FB90
FUSE_SPARE_BIT_5	0x7000FB94
FUSE_SPARE_BIT_6	0x7000FB98
FUSE_SPARE_BIT_7	0x7000FB9C
FUSE_SPARE_BIT_8	0x7000FBA0
FUSE_SPARE_BIT_9	0x7000FBA4
FUSE_SPARE_BIT_10	0x7000FBA8
FUSE_SPARE_BIT_11	0x7000FBAC
FUSE_SPARE_BIT_12	0x7000FBB0
FUSE_SPARE_BIT_13	0x7000FBB4
FUSE_SPARE_BIT_14	0x7000FBB8
FUSE_SPARE_BIT_15	0x7000FBBC
FUSE_SPARE_BIT_16	0x7000FBC0
FUSE_SPARE_BIT_17	0x7000FBC4
FUSE_SPARE_BIT_18	0x7000FBC8
FUSE_SPARE_BIT_19	0x7000FBCC
FUSE_SPARE_BIT_20	0x7000FBD0
FUSE_SPARE_BIT_21	0x7000FBD4
FUSE_SPARE_BIT_22	0x7000FBD8
FUSE_SPARE_BIT_23	0x7000FBDC
FUSE_SPARE_BIT_24	0x7000FBE0
FUSE_SPARE_BIT_25	0x7000FBE4
FUSE_SPARE_BIT_26	0x7000FBE8
FUSE_SPARE_BIT_27	0x7000FBEC
FUSE_SPARE_BIT_28	0x7000FBF0
FUSE_SPARE_BIT_29	0x7000FBF4
FUSE_SPARE_BIT_30	0x7000FBF8
FUSE_SPARE_BIT_31	0x7000FBFC

FUSE_SKU_INFO

Stores the SKU ID (must be 0x83).

FUSE_OPT_FT_REV

Stores the FT (Final Test) revision.

Original Erista units have this value set to 0xA0 (revision 5.0). The first batch of patched Erista units have this value set to 0xC0 (revision 6.0). The second batch of patched Erista units have this value set to 0xE0 (revision 7.0).

Mariko and Lite units have this value set to 0x60 (revision 3.0). OLED units have this value set to 0x81 (revision 4.1).

FUSE_SOC_SPEEDO_1_CALIB

Stores the bootrom patch version.

FUSE_FA

Stores failure analysis mode.

FUSE_PUBLIC_KEY

Stores the SHA256 hash of the 2048-bit RSA key expected at BCT+0x210.

FUSE_OPT_CP_REV

Stores the CP (Chip Probing) revision.

Original Erista units have this value set to 0xA0 (revision 5.0). Patched Erista units have this value set to 0x103 (revision 8.3).

Mariko units have this value set to 0x40 (revision 2.0). Lite units have this value set to 0x41 (revision 2.1). OLED units have this value set to 0x100 (revision 8.0).

FUSE_PRIVATE_KEY

Stores the 160-bit private key (128 bit SBK + 32-bit device key).

Reads to these registers after FUSE_PRIVATEKEYDISABLE is set produce all-FF output.

FUSE_ARM_JTAG_DIS

Controls access to the Arm JTAG interface.

Production Erista and Mariko units have this value set to 0x1, while development Erista and Mariko units do not.

FUSE_RESERVED_SW

Bits	Description
0-2	Boot device
3	Skip device selection straps
4	Enable charger detection
5	Enable watchdog
6	Forced RCM two button mode (0 = VOLUME_UP, 1 = VOLUME_UP + HOME)
7	RCM USB controller mode (0 = USB 2.0, 1 = XUSB)

Stores software reserved configuration values.

Production Erista and Mariko units have the forced RCM two button mode set, while development Erista and Mariko units do not.

Original Erista units have the RCM USB controller mode set to USB 2.0, while the first batch of patched Erista units have the RCM USB controller mode set to XUSB. Mariko ignores this and uses XUSB regardless for RCM.

FUSE_RESERVED_ODM0

Bits	Description
0-31	OdmTestId0

FUSE_RESERVED_ODM1

Bits	Description
0-31	OdmTestId1

FUSE_RESERVED_ODM2

Bits	Description
0-31	OdmTestId2

[5.0.0+] If FormatVersion is 1, this becomes:

Bits	Description
0-4	DeviceUniqueKeyGeneration
5-31	Reserved

FUSE_RESERVED_ODM3

Bits	Description
0-31	OdmTestId3

[5.0.0+] If FormatVersion is 1, this becomes:

Bits	Description
0-31	Reserved

FUSE_RESERVED_ODM4

Bits	Description
0-1	HardwareState1
2	HardwareType1
[1.0.0-3.0.2] 3-5 [4.0.0+] 3-7	[15.0.0+] DramId1 ([4.0.0-14.1.2] DramId)
8	HardwareType2
9	HardwareState2
10	[3.0.0+] QuestState
11	[5.0.0+] FormatVersion
12-14	[15.0.0+] DramId2
16-19	[4.0.0+] HardwareType3

Stores device configuration parameters.

FUSE_RESERVED_ODM5

Empty and unused.

FUSE_RESERVED_ODM6

Returns the value of the reserved_odm6 anti-downgrade fuse.

FUSE_RESERVED_ODM7

Returns the value of the reserved_odm7 anti-downgrade fuse.

FUSE_SKU_DIRECT_CONFIG

Bits	Description
0	Disable SCPU
1	Disable FCPU0
2	Disable FCPU1
3	Disable FCPU2
4	Disable FCPU3
5	Disable all CPUs

Controls which CPUs can be used.

Erista units have this value set to 0x00 (both Cortex-A53 and Cortex-A57 clusters are usable).

Mariko units have this value set to 0x01 (only the Cortex-A57 cluster is usable).

FUSE_OPT_SEC_DEBUG_EN

Controls the Falcon SCP debug mode.

FUSE_OPT_PRIV_SEC_DIS

Controls the Falcon Light Secure feature.

FUSE_PKC_DISABLE

Returns if public key crypto is used or not.

FUSE_ODM_INFO

Bits	Description
0-7	Reserved
8	Disable DBGEN
9	Disable NIDEN
10	Disable SPIDEN
11	Disable SPNIDEN
12	Disable DEVICEEN

Production Erista and Mariko units have this value set to 0x1F00 (all signals disabled).

Development Erista and Mariko units have this value set to 0x0000 (all signals enabled).

FUSE_ECO_RESERVE_0

Returns the chip unique AID.

FUSE_SPARE_BIT_2

Bits	Description
0	Speedo fusing revision

FUSE_SPARE_BIT_3

Bits	Description
0	Speedo fusing revision

FUSE_SPARE_BIT_4

Bits	Description
0	Speedo fusing revision

FUSE_SPARE_BIT_5

Must be non-zero on production units, otherwise the first bootloader panics. On prototype units it can be zero, which tells the bootloader to choose from two pre-production master key seeds. If set to non-zero on a prototype unit, it tells the bootloader to choose from two master key seeds (with the second one being the same as the production master key seed).

[4.0.0+] This value is no longer used during boot.

Mariko

Registers from 0x7000F800 to 0x7000F800 + 0x94 represent the actual fuse driver which can be used to directly program the hardware fuse bitmap.

Registers from 0x7000F800 + 0x98 to 0x7000F800 + 0x3FC represent the fuse cache which holds the sensed values of certain fuses.

Driver

Name	Address
FUSE_FUSECTRL	0x7000F800
FUSE_FUSEADDR	0x7000F804
FUSE_FUSERDATA	0x7000F808
FUSE_FUSEWDATA	0x7000F80C
FUSE_FUSETIME_RD1	0x7000F810
FUSE_FUSETIME_RD2	0x7000F814
FUSE_FUSETIME_PGM1	0x7000F818
FUSE_FUSETIME_PGM2	0x7000F81C
FUSE_PRIV2INTFC_START	0x7000F820
FUSE_FUSEBYPASS	0x7000F824
FUSE_PRIVATEKEYDISABLE	0x7000F828
FUSE_DISABLEREGPROGRAM	0x7000F82C
FUSE_WRITE_ACCESS_SW	0x7000F830
FUSE_PRIV2RESHIFT	0x7000F83C
FUSE_FUSETIME_RD3	0x7000F84C
FUSE_SPARE_ADDR_START	0x7000F860
FUSE_PRIVATE_KEY0_NONZERO	0x7000F880
FUSE_PRIVATE_KEY1_NONZERO	0x7000F884
FUSE_PRIVATE_KEY2_NONZERO	0x7000F888
FUSE_PRIVATE_KEY3_NONZERO	0x7000F88C
FUSE_PRIVATE_KEY4_NONZERO	0x7000F890

FUSE_SPARE_ADDR_START

Bits	Description
0-31	FUSE_SPARE_ADDR_START_DATA

Returns the offset of the spare bit fuse registers (always 0x380).

Cache

Name	Address
FUSE_RESERVED_ODM8	0x7000F898
FUSE_RESERVED_ODM9	0x7000F89C
FUSE_RESERVED_ODM10	0x7000F8A0
FUSE_RESERVED_ODM11	0x7000F8A4
FUSE_RESERVED_ODM12	0x7000F8A8
FUSE_RESERVED_ODM13	0x7000F8AC
FUSE_RESERVED_ODM14	0x7000F8B0
FUSE_RESERVED_ODM15	0x7000F8B4
FUSE_RESERVED_ODM16	0x7000F8B8
FUSE_RESERVED_ODM17	0x7000F8BC
FUSE_RESERVED_ODM18	0x7000F8C0
FUSE_RESERVED_ODM19	0x7000F8C4
FUSE_RESERVED_ODM20	0x7000F8C8
FUSE_RESERVED_ODM21	0x7000F8CC
FUSE_KEK00	0x7000F8D0
FUSE_KEK01	0x7000F8D4
FUSE_KEK02	0x7000F8D8
FUSE_KEK03	0x7000F8DC
FUSE_BEK00	0x7000F8E0
FUSE_BEK01	0x7000F8E4
FUSE_BEK02	0x7000F8E8
FUSE_BEK03	0x7000F8EC
FUSE_OPT_RAM_RTSEL_TSMCSP_PO4SVT	0x7000F8F0
FUSE_OPT_RAM_WTSEL_TSMCSP_PO4SVT	0x7000F8F4
FUSE_OPT_RAM_RTSEL_TSMCPDP_PO4SVT	0x7000F8F8
FUSE_OPT_RAM_MTSEL_TSMCPDP_PO4SVT	0x7000F8FC
FUSE_PRODUCTION_MODE	0x7000F900
FUSE_JTAG_SECUREID_VALID	0x7000F904
FUSE_ODM_LOCK	0x7000F908
FUSE_OPT_OPENGL_EN	0x7000F90C
FUSE_SKU_INFO	0x7000F910
FUSE_CPU_SPEEDO_0_CALIB	0x7000F914
FUSE_CPU_IDDQ_CALIB	0x7000F918
FUSE_RESERVED_ODM22	0x7000F91C
FUSE_RESERVED_ODM23	0x7000F920
FUSE_RESERVED_ODM24	0x7000F924
FUSE_OPT_FT_REV	0x7000F928
FUSE_CPU_SPEEDO_1_CALIB	0x7000F92C
FUSE_CPU_SPEEDO_2_CALIB	0x7000F930
FUSE_SOC_SPEEDO_0_CALIB	0x7000F934
FUSE_SOC_SPEEDO_1_CALIB	0x7000F938
FUSE_SOC_SPEEDO_2_CALIB	0x7000F93C
FUSE_SOC_IDDQ_CALIB	0x7000F940
FUSE_RESERVED_ODM25	0x7000F944
FUSE_FA	0x7000F948
FUSE_RESERVED_PRODUCTION	0x7000F94C
FUSE_HDMI_LANE0_CALIB	0x7000F950
FUSE_HDMI_LANE1_CALIB	0x7000F954
FUSE_HDMI_LANE2_CALIB	0x7000F958
FUSE_HDMI_LANE3_CALIB	0x7000F95C
FUSE_ENCRYPTION_RATE	0x7000F960
FUSE_PUBLIC_KEY0	0x7000F964
FUSE_PUBLIC_KEY1	0x7000F968
FUSE_PUBLIC_KEY2	0x7000F96C
FUSE_PUBLIC_KEY3	0x7000F970
FUSE_PUBLIC_KEY4	0x7000F974
FUSE_PUBLIC_KEY5	0x7000F978
FUSE_PUBLIC_KEY6	0x7000F97C
FUSE_PUBLIC_KEY7	0x7000F980
FUSE_TSENSOR1_CALIB	0x7000F984
FUSE_TSENSOR2_CALIB	0x7000F988
FUSE_OPT_SECURE_SCC_DIS	0x7000F98C
FUSE_OPT_CP_REV	0x7000F990
FUSE_OPT_PFG	0x7000F994
FUSE_TSENSOR0_CALIB	0x7000F998
FUSE_FIRST_BOOTROM_PATCH_SIZE	0x7000F99C
FUSE_SECURITY_MODE	0x7000F9A0
FUSE_PRIVATE_KEY0	0x7000F9A4
FUSE_PRIVATE_KEY1	0x7000F9A8
FUSE_PRIVATE_KEY2	0x7000F9AC
FUSE_PRIVATE_KEY3	0x7000F9B0
FUSE_PRIVATE_KEY4	0x7000F9B4
FUSE_ARM_JTAG_DIS	0x7000F9B8
FUSE_BOOT_DEVICE_INFO	0x7000F9BC
FUSE_RESERVED_SW	0x7000F9C0
FUSE_OPT_VP9_DISABLE	0x7000F9C4
FUSE_RESERVED_ODM0	0x7000F9C8
FUSE_RESERVED_ODM1	0x7000F9CC
FUSE_RESERVED_ODM2	0x7000F9D0
FUSE_RESERVED_ODM3	0x7000F9D4
FUSE_RESERVED_ODM4	0x7000F9D8
FUSE_RESERVED_ODM5	0x7000F9DC
FUSE_RESERVED_ODM6	0x7000F9E0
FUSE_RESERVED_ODM7	0x7000F9E4
FUSE_OBS_DIS	0x7000F9E8
FUSE_OPT_NVJTAG_PROTECTION_ENABLE	0x7000F9EC
FUSE_USB_CALIB	0x7000F9F0
FUSE_SKU_DIRECT_CONFIG	0x7000F9F4
FUSE_KFUSE_PRIVKEY_CTRL	0x7000F9F8
FUSE_PACKAGE_INFO	0x7000F9FC
FUSE_OPT_VENDOR_CODE	0x7000FA00
FUSE_OPT_FAB_CODE	0x7000FA04
FUSE_OPT_LOT_CODE_0	0x7000FA08
FUSE_OPT_LOT_CODE_1	0x7000FA0C
FUSE_OPT_WAFER_ID	0x7000FA10
FUSE_OPT_X_COORDINATE	0x7000FA14
FUSE_OPT_Y_COORDINATE	0x7000FA18
FUSE_OPT_SEC_DEBUG_EN	0x7000FA1C
FUSE_OPT_OPS_RESERVED	0x7000FA20
	0x7000FA24
FUSE_GPU_IDDQ_CALIB	0x7000FA28
FUSE_TSENSOR3_CALIB	0x7000FA2C
FUSE_CLOCK_BONDOUT0	0x7000FA30
FUSE_CLOCK_BONDOUT1	0x7000FA34
FUSE_RESERVED_ODM26	0x7000FA38
FUSE_RESERVED_ODM27	0x7000FA3C
FUSE_RESERVED_ODM28	0x7000FA40
FUSE_OPT_SAMPLE_TYPE	0x7000FA44
FUSE_OPT_SUBREVISION	0x7000FA48
FUSE_OPT_SW_RESERVED_0	0x7000FA4C
FUSE_OPT_SW_RESERVED_1	0x7000FA50
FUSE_TSENSOR4_CALIB	0x7000FA54
FUSE_TSENSOR5_CALIB	0x7000FA58
FUSE_TSENSOR6_CALIB	0x7000FA5C
FUSE_TSENSOR7_CALIB	0x7000FA60
FUSE_OPT_PRIV_SEC_DIS	0x7000FA64
FUSE_BOOT_SECURITY_INFO	0x7000FA68
FUSE_OPT_RAM_RTSEL_TSMCSP_PO4HVT	0x7000FA6C
FUSE_OPT_RAM_WTSEL_TSMCSP_PO4HVT	0x7000FA70
FUSE_OPT_RAM_RTSEL_TSMCPDP_PO4HVT	0x7000FA74
FUSE_OPT_RAM_MTSEL_TSMCPDP_PO4HVT	0x7000FA78
FUSE_FUSE2TSEC_DEBUG_DISABLE	0x7000FA7C
FUSE_TSENSOR_COMMON	0x7000FA80
FUSE_OPT_CP_BIN	0x7000FA84
FUSE_OPT_GPU_DISABLE	0x7000FA88
FUSE_OPT_FT_BIN	0x7000FA8C
FUSE_OPT_DONE_MAP	0x7000FA90
FUSE_RESERVED_ODM29	0x7000FA94
FUSE_APB2JTAG_DISABLE	0x7000FA98
FUSE_ODM_INFO	0x7000FA9C
FUSE_ARM_CRYPT_DE_FEATURE	0x7000FAA8
FUSE_OPT_RAM_WTSEL_TSMCPDP_PO4SVT	0x7000FAB0
FUSE_OPT_RAM_RCT_TSMCDP_PO4SVT	0x7000FAB4
FUSE_OPT_RAM_WCT_TSMCDP_PO4SVT	0x7000FAB8
FUSE_OPT_RAM_KP_TSMCDP_PO4SVT	0x7000FABC
FUSE_WOA_SKU_FLAG	0x7000FAC0
FUSE_ECO_RESERVE_1	0x7000FAC4
FUSE_GCPLEX_CONFIG_FUSE	0x7000FAC8
FUSE_PRODUCTION_MONTH	0x7000FACC
FUSE_RAM_REPAIR_INDICATOR	0x7000FAD0
FUSE_TSENSOR9_CALIB	0x7000FAD4
FUSE_VMIN_CALIBRATION	0x7000FADC
FUSE_AGING_SENSOR_CALIBRATION	0x7000FAE0
FUSE_DEBUG_AUTHENTICATION	0x7000FAE4
FUSE_SECURE_PROVISION_INDEX	0x7000FAE8
FUSE_SECURE_PROVISION_INFO	0x7000FAEC
FUSE_OPT_GPU_DISABLE_CP1	0x7000FAF0
FUSE_SPARE_ENDIS	0x7000FAF4
FUSE_ECO_RESERVE_0	0x7000FAF8
FUSE_RESERVED_CALIB0	0x7000FB04
FUSE_RESERVED_CALIB1	0x7000FB08
FUSE_OPT_GPU_TPC0_DISABLE	0x7000FB0C
FUSE_OPT_GPU_TPC0_DISABLE_CP1	0x7000FB10
FUSE_OPT_CPU_DISABLE	0x7000FB14
FUSE_OPT_CPU_DISABLE_CP1	0x7000FB18
FUSE_TSENSOR10_CALIB	0x7000FB1C
FUSE_TSENSOR10_CALIB_AUX	0x7000FB20
FUSE_OPT_RAM_WTSEL_TSMCPDP_PO4HVT	0x7000FB24
FUSE_OPT_RAM_RCT_TSMCDP_PO4HVT	0x7000FB28
FUSE_OPT_RAM_WCT_TSMCDP_PO4HVT	0x7000FB2C
FUSE_OPT_RAM_KP_TSMCDP_PO4HVT	0x7000FB30
	0x7000FB34
FUSE_OPT_GPU_TPC0_DISABLE_CP2	0x7000FB38
FUSE_OPT_GPU_TPC1_DISABLE	0x7000FB3C
FUSE_OPT_GPU_TPC1_DISABLE_CP1	0x7000FB40
FUSE_OPT_GPU_TPC1_DISABLE_CP2	0x7000FB44
FUSE_OPT_CPU_DISABLE_CP2	0x7000FB48
FUSE_OPT_GPU_DISABLE_CP2	0x7000FB4C
FUSE_USB_CALIB_EXT	0x7000FB50
FUSE_RESERVED_FIELD	0x7000FB54
FUSE_SPARE_REALIGNMENT_REG	0x7000FB7C
FUSE_SPARE_BIT_0	0x7000FB80
FUSE_SPARE_BIT_1	0x7000FB84
FUSE_SPARE_BIT_2	0x7000FB88
FUSE_SPARE_BIT_3	0x7000FB8C
FUSE_SPARE_BIT_4	0x7000FB90
FUSE_SPARE_BIT_5	0x7000FB94
FUSE_SPARE_BIT_6	0x7000FB98
FUSE_SPARE_BIT_7	0x7000FB9C
FUSE_SPARE_BIT_8	0x7000FBA0
FUSE_SPARE_BIT_9	0x7000FBA4
FUSE_SPARE_BIT_10	0x7000FBA8
FUSE_SPARE_BIT_11	0x7000FBAC
FUSE_SPARE_BIT_12	0x7000FBB0
FUSE_SPARE_BIT_13	0x7000FBB4
FUSE_SPARE_BIT_14	0x7000FBB8
FUSE_SPARE_BIT_15	0x7000FBBC
FUSE_SPARE_BIT_16	0x7000FBC0
FUSE_SPARE_BIT_17	0x7000FBC4
FUSE_SPARE_BIT_18	0x7000FBC8
FUSE_SPARE_BIT_19	0x7000FBCC
FUSE_SPARE_BIT_20	0x7000FBD0
FUSE_SPARE_BIT_21	0x7000FBD4
FUSE_SPARE_BIT_22	0x7000FBD8
FUSE_SPARE_BIT_23	0x7000FBDC
FUSE_SPARE_BIT_24	0x7000FBE0
FUSE_SPARE_BIT_25	0x7000FBE4
FUSE_SPARE_BIT_26	0x7000FBE8
FUSE_SPARE_BIT_27	0x7000FBEC
FUSE_SPARE_BIT_28	0x7000FBF0
FUSE_SPARE_BIT_29	0x7000FBF4

FUSE_KEK

Stores the 128-bit KEK (Key Encryption Key) encrypted with the FEK (Fuse Encryption Key) selected by FUSE_RESERVED_PRODUCTION and FUSE_BOOT_SECURITY_INFO.

Reads to these registers after FUSE_PRIVATEKEYDISABLE is set produce all-FF output.

FUSE_BEK

Stores the 128-bit BEK (Boot Encryption Key) encrypted with the FEK (Fuse Encryption Key) selected by FUSE_RESERVED_PRODUCTION and FUSE_BOOT_SECURITY_INFO.

Reads to these registers after FUSE_PRIVATEKEYDISABLE is set produce all-FF output.

FUSE_RESERVED_PRODUCTION

Bits	Description
0-1	Reserved
2	FEK bank select

FUSE_OPT_NVJTAG_PROTECTION_ENABLE

Controls the NVJTAG protection feature. If enabled, this will permanently disable access to all DFT (Design for Test) functions which include the ability put the chip in FA (Failure Analysis) mode.

FUSE_RESERVED_ODM28

Bits	Description
0	RegulatorType

FUSE_BOOT_SECURITY_INFO

Bits	Description
0-1	Authentication (0 = AES_CMAC, 1 = PKC_RSA)
2	Encryption (0 = DISABLE, 1 = ENABLE)
3	Fuse encryption (0 = DISABLE, 1 = ENABLE)
4-6	Fuse encryption select (0 = TEST_KEY, 1 = NVIDIA_KEY, 2 to 7 = OEM_KEY_0 to OEM_KEY_5)
7	SE atomic context save (0 = DISABLE, 1 = ENABLE)

Stores configuration values for the new boot security mechanism.

Mariko units have authentication set to PKC_RSA, encryption enabled, fuse encryption enabled and fuse encryption select set to OEM_KEY_0 (development units) or OEM_KEY_1 (production units).

Bitmap

The actual hardware fuses are stored in a bitmap and may be programmed through the fuse driver after enabling fuse programming.

Fuse numbers are relative to the start of the fuse bitmap where each element is a 4 byte word and has a redundant alias. A single fuse write operation must always write the same value to fuse_bitmap + ((fuse_number + 0) << 2) (PRIMARY_ALIAS) and fuse_bitmap + ((fuse_number + 1) << 2) (REDUNDANT_ALIAS). However, spare bits and all fuses afterwards in the fuse bitmap, no longer have a redundant alias.

Erista

Name	Number	Redundant number	Bits
enable_fuse_program	0	1	0
disable_fuse_program	0	1	1
bypass_fuses	0	1	2
jtag_direct_access_disable	0	1	3
production_mode	0	1	4
jtag_secureid_valid	0	1	5
odm_lock	0	1	6-9
fa_mode	0	1	10
security_mode	0	1	11
arm_debug_dis	0	1	12
obs_dis	0	1	13
public_key0	10	11	30-31
public_key0	12	13	0-29
public_key1	12	13	30-31
public_key1	14	15	0-29
public_key2	14	15	30-31
public_key2	16	17	0-29
public_key3	16	17	30-31
public_key3	18	19	0-29
public_key4	18	19	30-31
public_key4	20	21	0-29
public_key5	20	21	30-31
public_key5	22	23	0-29
public_key6	22	23	30-31
public_key6	24	25	0-29
public_key7	24	25	30-31
public_key7	26	27	0-29
private_key0	34	35	12-31
private_key0	36	37	0-11
private_key1	36	37	12-31
private_key1	38	39	0-11
private_key2	38	39	12-31
private_key2	40	41	0-11
private_key3	40	41	12-31
private_key3	42	43	0-11
private_key4	42	43	12-31
private_key4	44	45	0-11
boot_device_info	44	45	12-27
reserved_sw	44	45	28-31
reserved_sw	46	47	0-3
reserved_odm0	46	47	5-31
reserved_odm0	48	49	0-4
reserved_odm1	48	49	5-31
reserved_odm1	50	51	0-4
reserved_odm2	50	51	5-31
reserved_odm2	52	53	0-4
reserved_odm3	52	53	5-31
reserved_odm3	54	55	0-4
reserved_odm4	54	55	5-31
reserved_odm4	56	57	0-4
reserved_odm5	56	57	5-31
reserved_odm5	58	59	0-4
reserved_odm6	58	59	5-31
reserved_odm6	60	61	0-4
reserved_odm7	60	61	5-31
reserved_odm7	62	63	0-4
kfuse_privkey_ctrl	64	65	13-14
package_info	64	65	15-18
opt_vendor_code	64	65	19-22
opt_fab_code	64	65	23-28
opt_lot_code_0	64	65	29-31
opt_lot_code_0	66	67	0-28
opt_lot_code_1	66	67	29-31
opt_lot_code_1	68	69	0-24
opt_wafer_id	68	69	25-30
opt_x_coordinate	68	69	31
opt_x_coordinate	70	71	0-7
opt_y_coordinate	70	71	8-16
opt_sec_debug_en	70	71	17
opt_ops_reserved	70	71	18-23
sata_calib	70	71	24-25
opt_priv_sec_en	90	91	8
pkc_disable	90	91	9
fuse2tsec_debug_disable	90	91	10
secure_provision_index	90	91	24-27
secure_provision_info	90	91	28-29
spare_bit_0	100	None	16
spare_bit_1	100	None	17
spare_bit_2	100	None	18
spare_bit_3	100	None	19
spare_bit_4	100	None	20
spare_bit_5	100	None	21
spare_bit_6	100	None	22
spare_bit_7	100	None	23
spare_bit_8	100	None	24
spare_bit_9	100	None	25
spare_bit_10	100	None	26
spare_bit_11	100	None	27
spare_bit_12	100	None	28
spare_bit_13	100	None	29
spare_bit_14	100	None	30
spare_bit_15	100	None	31
spare_bit_16	101	None	16
spare_bit_17	101	None	17
spare_bit_18	101	None	18
spare_bit_19	101	None	19
spare_bit_20	101	None	20
spare_bit_21	101	None	21
spare_bit_22	101	None	22
spare_bit_23	101	None	23
spare_bit_24	101	None	24
spare_bit_25	101	None	25
spare_bit_26	101	None	26
spare_bit_27	101	None	27
spare_bit_28	101	None	28
spare_bit_29	101	None	29
spare_bit_30	101	None	30
spare_bit_31	101	None	31
aid	103	None	2-31
aid	104	None	0-1
reshift_records	106	None	0-192
irom_patch	112	None	0-2560

reserved_odm6

Used for anti-downgrade control.

reserved_odm7

Used for anti-downgrade control.

irom_patch

Bootrom patches are burned to the hardware fuse bitmap using a specific format (see ipatch decoder). The bootrom reads these fuses in order to initialize the IPATCH hardware, which allows overriding data returned for code and data fetches done by BPMP.

The following represents the patch data dumped from a Switch console:

RAM:00000000 ; =============== S U B R O U T I N E =======================================
RAM:00000000
RAM:00000000
RAM:00000000 irom_svc_dispatch
RAM:00000000   STMFD   SP!, {R0-R2}                  ; ipatches (new):
RAM:00000000                                         ;  0: 0x0b57df00 0x001016ae 0x0000df00 : svc #0x00 (offset 0x48)
RAM:00000000                                         ;  1: 0x1820df22 0x00103040 0x0000df22 : svc #0x22 (offset 0x8c)
RAM:00000000                                         ;  2: 0x3797df26 0x00106f2e 0x0000df26 : svc #0x26 (offset 0x94)
RAM:00000000                                         ;  3: 0x3b4d2100 0x0010769a 0x00002100 : movs r1, #0x00
RAM:00000000                                         ;  4: 0x042bdf2c 0x00100856 0x0000df2c : svc #0x2c (offset 0xa0)
RAM:00000000                                         ;  5: 0x37aadf42 0x00106f54 0x0000df42 : svc #0x42 (offset 0xcc)
RAM:00000000                                         ;  6: 0x0972df4b 0x001012e4 0x0000df4b : svc #0x4b (offset 0xde)
RAM:00000000                                         ;  7: 0x2293df54 0x00104526 0x0000df54 : svc #0x54 (offset 0xf0)
RAM:00000000                                         ;  8: 0x21fadf5d 0x001043f4 0x0000df5d : svc #0x5d (offset 0x102)
RAM:00000000                                         ;  9: 0xbba2ac57 0x00117744 0x0000ac57 : data
RAM:00000000                                         ; 10: 0xbbac3d19 0x00117758 0x00003d19 : data
RAM:00000000                                         ; 11: 0x1e952001 0x00103d2a 0x00002001 : movs r0, #0x01
RAM:00000000                                         ; 
RAM:00000000                                         ; ipatches (old):
RAM:00000000                                         ;  0: 0x0b57df00 0x001016ae 0x0000df00 : svc #0x00 (offset 0x48)
RAM:00000000                                         ;  1: 0x1820df22 0x00103040 0x0000df22 : svc #0x22 (offset 0x8c)
RAM:00000000                                         ;  2: 0x3797df26 0x00106f2e 0x0000df26 : svc #0x26 (offset 0x94)
RAM:00000000                                         ;  3: 0x7d9e2000 0x0010fb3c 0x00002000 : movs r0, #0x00
RAM:00000000                                         ;  4: 0x042bdf2c 0x00100856 0x0000df2c : svc #0x2c (offset 0xa0)
RAM:00000000                                         ;  5: 0x37aadf42 0x00106f54 0x0000df42 : svc #0x42 (offset 0xcc)
RAM:00000000                                         ;  6: 0x0972df4b 0x001012e4 0x0000df4b : svc #0x4b (offset 0xde)
RAM:00000000                                         ;  7: 0x2293df54 0x00104526 0x0000df54 : svc #0x54 (offset 0xf0)
RAM:00000000                                         ;  8: 0x21fadf5d 0x001043f4 0x0000df5d : svc #0x5d (offset 0x102)
RAM:00000000                                         ;  9: 0xbba2ac57 0x00117744 0x0000ac57 : data
RAM:00000000                                         ; 10: 0xbbac3d19 0x00117758 0x00003d19 : data
RAM:00000000                                         ; 11: 0x1e952001 0x00103d2a 0x00002001 : movs r0, #0x01
RAM:00000004   MOV     R2, LR
RAM:00000008   SUB     R2, R2, #2
RAM:0000000C   LDR     R2, [R2]
RAM:00000010   AND     R2, R2, #0xFF
RAM:00000014   MOV     R2, R2,LSL#1
RAM:00000018   LDR     R0, =0x1007B0
RAM:0000001C   LDR     R1, =0x1007F8
RAM:00000020   SUB     R1, R1, R0
RAM:00000024   LDR     R0, =0x40004C30
RAM:00000028   ADD     R0, R0, R1
RAM:0000002C   ADD     R2, R2, R0
RAM:00000030   ORR     R2, R2, #1
RAM:00000034   LDMFD   SP!, {R0,R1}
RAM:00000038   BX      R2
RAM:00000038 ; End of function irom_svc_dispatch
RAM:00000038
RAM:00000038 ; ---------------------------------------------------------------------------
RAM:0000003C dword_3C DCD 0x1007B0                   ; DATA XREF: irom_svc_dispatch+18↑r
RAM:00000040 dword_40 DCD 0x1007F8                   ; DATA XREF: irom_svc_dispatch+1C↑r
RAM:00000044 dword_44 DCD 0x40004C30                 ; DATA XREF: irom_svc_dispatch+24↑r
RAM:00000048   CODE16
RAM:00000048
RAM:00000048 ; =============== S U B R O U T I N E =======================================
RAM:00000048
RAM:00000048
RAM:00000048 sub_48
RAM:00000048   MOVS    R2, #0                        ; 0: 0x0b57df00 0x001016ae 0x0000df00 : svc #0x00 (offset 0x48)
RAM:0000004A   MVNS    R2, R2
RAM:0000004C   LDR     R1, =0x60006410
RAM:0000004E   STR     R2, [R1,#0x30]
RAM:00000050   STR     R2, [R1,#0x38]
RAM:00000052   LDR     R1, =0x600060F8
RAM:00000054   STR     R2, [R1]
RAM:00000056   STR     R2, [R1,#4]
RAM:00000058   LDR     R1, =0x60006284
RAM:0000005A   STR     R2, [R1]
RAM:0000005C   STR     R2, [R1,#0x18]
RAM:0000005E   ADDS    R1, #0x80
RAM:00000060   ADDS    R1, #0x1C
RAM:00000062   STR     R2, [R1]
RAM:00000064   STR     R2, [R1,#8]
RAM:00000066   STR     R2, [R1,#0x10]
RAM:00000068   ADDS    R1, #0x80
RAM:0000006A   STR     R2, [R1]
RAM:0000006C   STR     R2, [R1,#4]
RAM:0000006E   LDR     R1, =0x60006554
RAM:00000070   STR     R2, [R1]
RAM:00000072   MOVS    R2, #0xA0000000
RAM:00000076   LDR     R1, =0x60006148
RAM:00000078   STR     R2, [R1]
RAM:0000007A   ADDS    R1, #0x38 ; '8'
RAM:0000007C   STR     R2, [R1]
RAM:0000007E   MOVS    R2, #0xE0000000
RAM:00000082   LDR     R1, =0x600066A0
RAM:00000084   STR     R2, [R1]
RAM:00000086   MOVS    R1, #0
RAM:00000088   MOVS    R0, #0xE
RAM:0000008A   B       pop_r2_mov_pc_lr
RAM:0000008A ; End of function sub_48
RAM:0000008A
RAM:0000008C
RAM:0000008C ; =============== S U B R O U T I N E =======================================
RAM:0000008C
RAM:0000008C
RAM:0000008C sub_8C
RAM:0000008C   LDR     R0, [R1,#0x18]                ; 1: 0x1820df22 0x00103040 0x0000df22 : svc #0x22 (offset 0x8c)
RAM:0000008E   MOVS    R2, #1
RAM:00000090   ORRS    R0, R2
RAM:00000092   B       pop_r2_mov_pc_lr
RAM:00000092 ; End of function sub_8C
RAM:00000092
RAM:00000094
RAM:00000094 ; =============== S U B R O U T I N E =======================================
RAM:00000094
RAM:00000094
RAM:00000094 sub_94
RAM:00000094   LDR     R2, [R4,#0x50]                ; 2: 0x3797df26 0x00106f2e 0x0000df26 : svc #0x26 (offset 0x94)
RAM:00000096   ADDS    R2, R2, #2
RAM:00000098   STR     R2, [R4,#0x50]
RAM:0000009A   SUBS    R1, #0x80
RAM:0000009C   STR     R1, [R4,#0x34]
RAM:0000009E   B       pop_r2_mov_pc_lr
RAM:0000009E ; End of function sub_94
RAM:0000009E
RAM:000000A0
RAM:000000A0 ; =============== S U B R O U T I N E =======================================
RAM:000000A0
RAM:000000A0
RAM:000000A0 sub_A0
RAM:000000A0
RAM:000000A0 ; FUNCTION CHUNK AT RAM:00000148 SIZE 00000004 BYTES
RAM:000000A0
RAM:000000A0   MOVS    R0, #0x70000000               ; 4: 0x042bdf2c 0x00100856 0x0000df2c : svc #0x2c (offset 0xa0)
RAM:000000A4   LDR     R6, =dword_7000EF14
RAM:000000A6   LDR     R2, =dword_7000E5B4
RAM:000000A8   LDR     R2, [R2]
RAM:000000AA   CMP     R2, #0
RAM:000000AC   BEQ     loc_B4
RAM:000000AE   LDR     R2, [R6]
RAM:000000B0   STR     R2, [R0,#8]
RAM:000000B2   B       loc_BC
RAM:000000B4 ; ---------------------------------------------------------------------------
RAM:000000B4
RAM:000000B4 loc_B4                                  ; CODE XREF: sub_A0+C↑j
RAM:000000B4   LDR     R2, [R0,#8]
RAM:000000B6   LSRS    R0, R0, #0x12
RAM:000000B8   ORRS    R2, R0
RAM:000000BA   STR     R2, [R6]
RAM:000000BC
RAM:000000BC loc_BC                                  ; CODE XREF: sub_A0+12↑j
RAM:000000BC   LDR     R6, =dword_7000E9C0
RAM:000000BE   LDR     R0, [R6]
RAM:000000C0   MOVS    R2, #0x4000
RAM:000000C4   ORRS    R2, R0
RAM:000000C6   STR     R2, [R6]
RAM:000000C8   LDR     R0, [R5,#0x10]
RAM:000000CA   B       pop_r2_mov_pc_lr
RAM:000000CA ; End of function sub_A0
RAM:000000CA
RAM:000000CC
RAM:000000CC ; =============== S U B R O U T I N E =======================================
RAM:000000CC
RAM:000000CC
RAM:000000CC sub_CC
RAM:000000CC   MOVS    R2, #0xF000000                ; 5: 0x37aadf42 0x00106f54 0x0000df42 : svc #0x42 (offset 0xcc)
RAM:000000D0   BICS    R1, R2
RAM:000000D2   STR     R1, [R4,#0x10]
RAM:000000D4   LDR     R1, [R4,#0x50]
RAM:000000D6   MOVS    R2, #7
RAM:000000D8   BICS    R1, R2
RAM:000000DA   STR     R1, [R4,#0x50]
RAM:000000DC   B       pop_r2_mov_pc_lr
RAM:000000DC ; End of function sub_CC
RAM:000000DC
RAM:000000DE
RAM:000000DE ; =============== S U B R O U T I N E =======================================
RAM:000000DE
RAM:000000DE
RAM:000000DE sub_DE
RAM:000000DE   LDR     R2, =dword_7000FA9C           ; 6: 0x0972df4b 0x001012e4 0x0000df4b : svc #0x4b (offset 0xde)
RAM:000000E0   LDR     R2, [R2]
RAM:000000E2   LSRS    R2, R2, #8
RAM:000000E4   LSLS    R2, R2, #1
RAM:000000E6   LDR     R1, [R4]
RAM:000000E8   BICS    R1, R2
RAM:000000EA   STR     R1, [R4]
RAM:000000EC   CMP     R0, #0
RAM:000000EE   B       pop_r2_mov_pc_lr
RAM:000000EE ; End of function sub_DE
RAM:000000EE
RAM:000000F0
RAM:000000F0 ; =============== S U B R O U T I N E =======================================
RAM:000000F0
RAM:000000F0
RAM:000000F0 sub_F0
RAM:000000F0
RAM:000000F0 arg_0=  0
RAM:000000F0
RAM:000000F0   LDR     R0, =0x400049F0               ; 7: 0x2293df54 0x00104526 0x0000df54 : svc #0x54 (offset 0xf0)
RAM:000000F2   LDR     R2, [R0]
RAM:000000F4   STR     R2, [SP,#arg_0]
RAM:000000F6   LDR     R0, =0x40010000
RAM:000000F8   LSRS    R2, R2, #17
RAM:000000FA   BEQ     pop_r2_mov_pc_lr              ; if ([0x400049F0] >> 17) == 0) {
RAM:000000FA                                         ;   r2 = [0x400049F0];
RAM:000000FA                                         ; } else {
RAM:000000FC   LDR     R0, =APBDEV_PMC_CNTRL_0
RAM:000000FE   STR     R4, [R0]                      ;  write APBDEV_PMC_CNTRL
RAM:00000100
RAM:00000100 loc_100                                 ; CODE XREF: sub_F0:loc_100↓j
RAM:00000100   B       loc_100                       ;  hang
RAM:00000100 ; End of function sub_F0                ; }
RAM:00000100
RAM:00000102
RAM:00000102 ; =============== S U B R O U T I N E =======================================
RAM:00000102
RAM:00000102
RAM:00000102 sub_102
RAM:00000102
RAM:00000102 arg_0=  0
RAM:00000102
RAM:00000102   LDR     R2, =0x40010220               ; 8: 0x21fadf5d 0x001043f4 0x0000df5d : svc #0x5d (offset 0x102)
RAM:00000104   STR     R2, [SP,#arg_0]               ; set r2 retval = [0x40010220]
RAM:00000106   LDR     R2, [R2,#0x18]
RAM:00000108   ADDS    R0, #0xFC
RAM:0000010A   STR     R2, [R0,#0x1C]                ; [r0+0x118] = [0x40010220 + 0x18]
RAM:0000010C   B       pop_r2_mov_pc_lr
RAM:0000010C ; End of function sub_102
RAM:0000010C
RAM:0000010C ; ---------------------------------------------------------------------------
RAM:0000010E   DCB    0
RAM:0000010F   DCB    0
RAM:00000110 off_110 DCD 0x60006410                  ; DATA XREF: sub_48+4↑r
RAM:00000114 off_114 DCD 0x600060F8                  ; DATA XREF: sub_48+A↑r
RAM:00000118 off_118 DCD 0x60006284                  ; DATA XREF: sub_48+10↑r
RAM:0000011C off_11C DCD 0x60006554                  ; DATA XREF: sub_48+26↑r
RAM:00000120 off_120 DCD 0x60006148                  ; DATA XREF: sub_48+2E↑r
RAM:00000124 off_124 DCD 0x600066A0                  ; DATA XREF: sub_48+3A↑r
RAM:00000128 off_128 DCD dword_7000EF14              ; DATA XREF: sub_A0+4↑r
RAM:0000012C off_12C DCD dword_7000E5B4              ; DATA XREF: sub_A0+6↑r
RAM:00000130 off_130 DCD dword_7000E9C0              ; DATA XREF: sub_A0:loc_BC↑r
RAM:00000134 off_134 DCD dword_7000FA9C              ; DATA XREF: sub_DE↑r
RAM:00000138 off_138 DCD 0x400049F0                  ; DATA XREF: sub_F0↑r
RAM:0000013C dword_13C DCD 0x40010000                ; DATA XREF: sub_F0+6↑r
RAM:00000140 off_140 DCD APBDEV_PMC_CNTRL_0          ; DATA XREF: sub_F0+C↑r
RAM:00000144 off_144 DCD 0x40010220                  ; DATA XREF: sub_102↑r
RAM:00000148 ; ---------------------------------------------------------------------------
RAM:00000148 ; START OF FUNCTION CHUNK FOR sub_A0
RAM:00000148
RAM:00000148 pop_r2_mov_pc_lr                        ; CODE XREF: sub_48+42↑j
RAM:00000148                                         ; sub_8C+6↑j ...
RAM:00000148   POP     {R2}
RAM:0000014A   MOV     PC, LR
RAM:0000014A ; END OF FUNCTION CHUNK FOR sub_A0

The last 4 patches are exclusive to the Switch, while the remaining ones are often included in most Tegra210 based devices.

IROM patch 0

This patch configures clock enables and clock gate overrides for new hardware.

 u32 CLK_ENB_H_SET = 0x60006328;
 u32 CLK_ENB_L_SET = 0x60006320;
 u32 CLK_ENB_U_SET = 0x60006330; 
 u32 CLK_ENB_V_SET = 0x60006440;
 u32 CLK_ENB_W_SET = 0x60006448;
 u32 CLK_ENB_X_SET = 0x60006284;
 u32 CLK_ENB_Y_SET = 0x6000629C;
 u32 LVL2_CLK_GATE_OVRA = 0x600060F8;
 u32 LVL2_CLK_GATE_OVRB = 0x600060FC;
 u32 LVL2_CLK_GATE_OVRC = 0x600063A0;
 u32 LVL2_CLK_GATE_OVRD = 0x600063A4;
 u32 LVL2_CLK_GATE_OVRE = 0x60006554;
 u32 CLK_SOURCE_VI = 0x60006148;
 u32 CLK_SOURCE_HOST1X = 0x60006180;
 u32 CLK_SOURCE_NVENC = 0x600066A0; 

 // Set all clock enables and overrides
 *(u32 *)CLK_ENB_V_SET = 0xFFFFFFFF;
 *(u32 *)CLK_ENB_W_SET = 0xFFFFFFFF;
 *(u32 *)LVL2_CLK_GATE_OVRA = 0xFFFFFFFF;
 *(u32 *)LVL2_CLK_GATE_OVRB = 0xFFFFFFFF;
 *(u32 *)CLK_ENB_X_SET = 0xFFFFFFFF;
 *(u32 *)CLK_ENB_Y_SET = 0xFFFFFFFF;
 *(u32 *)CLK_ENB_L_SET = 0xFFFFFFFF;
 *(u32 *)CLK_ENB_H_SET = 0xFFFFFFFF;
 *(u32 *)CLK_ENB_U_SET = 0xFFFFFFFF;
 *(u32 *)LVL2_CLK_GATE_OVRC = 0xFFFFFFFF;
 *(u32 *)LVL2_CLK_GATE_OVRD = 0xFFFFFFFF;
 *(u32 *)LVL2_CLK_GATE_OVRE = 0xFFFFFFFF;

 // Set VI, HOST1X and NVENC clock sources to CLK_M
 *(u32 *)CLK_SOURCE_VI = 0xA0000000;
 *(u32 *)CLK_SOURCE_HOST1X = 0xA0000000;
 *(u32 *)CLK_SOURCE_NVENC = 0xE0000000;

 /*
     Untranslated instructions:

     MOVS    R1, #0
     MOVS    R0, #0xE
 */
 
 return;

IROM patch 1

This patch is a bugfix.

LP0 resume code expects APBDEV_PMC_SCRATCH190_0 to be set to 0x01, but the bootrom didn't set it.

 u32 APBDEV_PMC_SCRATCH190_0 = 0x7000EC18;
 u32 pmc_scratch190_val = *(u32 *)APBDEV_PMC_SCRATCH190_0;
 
 return (pmc_scratch190_val | 0x01);

IROM patch 2

This patch adjusts USB configurations.

 u32 USB1_UTMIP_SPARE_CFG0_0 = 0x7D000834;
 u32 USB1_UTMIP_BIAS_CFG2_0 = 0x7D000850;
 
 // Increase UTMIP_HSSQUELCH_LEVEL_NEW by 0x02
 *(u32 *)USB1_UTMIP_BIAS_CFG2_0 += 0x02;

 // Clear FUSE_HS_IREF_CAP_CFG
 *(u32 *)USB1_UTMIP_SPARE_CFG0_0 = ((*(u32 *)USB1_UTMIP_SPARE_CFG0_0 & ~(0x118)) - 0x80);
 
 return;

IROM patch 3

This patch ensures that waiting on PRC_PENDING from the XUSB_DEV register T_XUSB_DEV_XHCI_PORTSC never fails.

In the second batch of patched units (FUSE_OPT_FT_REV set to revision 7.0) this patch has been replaced with a fix for CVE-2018-6242 (arbitrary copy when handling USB control requests in RCM). By setting R1 to 0 at address 0x0010769A in the bootrom, the upper 8 bits of the USB control request's wLength field are cleared out, effectively limiting the request's size to a maximum of 255 bytes.

IROM patch 4

This patch allows backing up and restoring strapping options for warmboot.

 u32 APBDEV_PMC_SCRATCH0_0 = 0x7000E450;
 u32 APBDEV_PMC_RST_STATUS_0 = 0x7000E5B4;
 u32 APBDEV_PMC_SEC_DISABLE8_0 = 0x7000E9C0;
 u32 APBDEV_PMC_SECURE_SCRATCH111_0 = 0x7000EF14;
 u32 APB_MISC_PP_STRAPPING_OPT_A_0 = 0x70000008; 

 u32 reset_status = *(u32 *)APBDEV_PMC_RST_STATUS_0;

 // Check for regular power on
 if (reset_status == 0)
 {    
     // Set all buttons in RCM_STRAPS and backup to PMC scratch
     *(u32 *)APBDEV_PMC_SECURE_SCRATCH111_0 = (*(u32 *)APB_MISC_PP_STRAPPING_OPT_A_0 | 0x1C00);
 }
 else
 {
     // Restore strapping options from PMC scratch
     *(u32 *)APB_MISC_PP_STRAPPING_OPT_A_0 = *(u32 *)APBDEV_PMC_SECURE_SCRATCH111_0;
 }

 // Disable write access to APBDEV_PMC_SECURE_SCRATCH111_0
 *(u32 *)APBDEV_PMC_SEC_DISABLE8_0 |= 0x4000;
 
 return *(u32 *)APBDEV_PMC_SCRATCH0_0;

IROM patch 5

This patch adjusts USB configurations.

 u32 USB1_UTMIP_HSRX_CFG0_0 = 0x7D000810;
 u32 USB1_UTMIP_BIAS_CFG2_0 = 0x7D000850;

 // Clear UTMIP_IDLE_WAIT, UTMIP_ELASTIC_LIMIT and UTMIP_PCOUNT_UPDN_DIV,
 // and set UTMIP_IDLE_WAIT to 0x11 and UTMIP_ELASTIC_LIMIT to 0x10 
 *(u32 *)USB1_UTMIP_HSRX_CFG0_0 = ((*(u32 *)USB1_UTMIP_HSRX_CFG0_0 & ~(0xF8000) + 0x88000 & ~(0x7C00) + 0x4000) & ~(0xF000000));
 
 // Clear UTMIP_HSSQUELCH_LEVEL_NEW
 *(u32 *)USB1_UTMIP_BIAS_CFG2_0 &= ~(0x07);
 
 return;

IROM patch 6

This patch is a factory backdoor.

It allows controlling the debug authentication configuration using a fuse.

 u32 FUSE_ODM_INFO = 0x7000FA9C;

 u32 odm_info = *(u32 *)FUSE_ODM_INFO;
 debug_auth_override_val = ((odm_info >> 0x08) << 0x01);

 // Override debug authentication value stored in IRAM
 *(u32 *)0x400028E4 &= ~(debug_auth_override_val);

 /*
     Untranslated instructions:
 
     CMP     R0, #0
 */
 
 return;

IROM patch 7

This patch is a bugfix.

It prevents overflowing IRAM (0x40010000) when copying the warmboot binary from DRAM.

 u32 APBDEV_PMC_CNTRL_0 = 0x7000E400;
 
 u32 warmboot_header_addr = 0x400049F0;
 u32 warmboot_bin_size = *(u32 *)warmboot_bin_header_addr;
 
 // Invalid warmboot binary size
 if (warmboot_size >> 0x11)
 {
     // Assert MAIN_RST
     // 0x40004BF0 comes from R4 and the bootrom doesn't bother to change it
     *(u32 *)APBDEV_PMC_CNTRL_0 = 0x40004BF0;

     // Deadlock
     while(1);
 }
 
 /*
     Untranslated instructions:
 
     LDR     R0, =0x40010000
     LDR     R2, [warmboot_bin_header_addr]
 */

 return;

IROM patch 8

This patch is a bugfix.

It sets the correct warmboot binary entrypoint address for RSA signature verification, which would be done in DRAM instead of IRAM without this patch.

 u32 warmboot_addr_ptr = 0x40010238;
 u32 warmboot_entry_addr_ptr = 0x40004C28;

 *(u32 *)warmboot_entry_addr_ptr = *(u32 *)warmboot_addr_ptr;

 /*
     Untranslated instructions:
 
     LDR     R2, [warmboot_addr_ptr]
 */
 
 return;

IROM patches 9 and 10

These patches modify the 256-bit Secure Provisioning AES key with index 0x3A.

IROM patch 11

This patch forces the value of SE_TZRAM_SECURITY to be 0x01 instead of restoring it from the saved SE context.

Mariko

Name	Number	Redundant number	Bits
enable_fuse_program	0	1	0
disable_fuse_program	0	1	1
bypass_fuses	0	1	2
jtag_direct_access_disable	0	1	3
production_mode	0	1	4
jtag_secureid_valid	0	1	5
odm_lock	0	1	6-21
fa_mode	0	1	22
security_mode	0	1	23
arm_debug_dis	0	1	24
obs_dis	0	1	25
public_key0	64	65	15-31
public_key0	66	67	0-14
public_key1	66	67	15-31
public_key1	68	69	0-14
public_key2	68	69	15-31
public_key2	70	71	0-14
public_key3	70	71	15-31
public_key3	72	73	0-14
public_key4	72	73	15-31
public_key4	74	75	0-14
public_key5	74	75	15-31
public_key5	76	77	0-14
public_key6	76	77	15-31
public_key6	78	79	0-14
public_key7	78	79	15-31
public_key7	80	81	0-14
private_key0	86	87	30-31
private_key0	88	89	0-29
private_key1	88	89	30-31
private_key1	90	91	0-29
private_key2	90	91	30-31
private_key2	92	93	0-29
private_key3	92	93	30-31
private_key3	94	95	0-29
private_key4	94	95	30-31
private_key4	96	97	0-29
boot_device_info	96	97	30-31
boot_device_info	98	99	0-13
reserved_sw	98	99	14-25
secure_provision_index	152	153	23-26
secure_provision_info	152	153	27-28
aid	165	None	2-31
aid	166	None	0-1
spare_bit_0	167	None	2
spare_bit_1	167	None	3
spare_bit_2	167	None	4
spare_bit_3	167	None	5
spare_bit_4	167	None	6
spare_bit_5	167	None	7
spare_bit_6	167	None	8
spare_bit_7	167	None	9
spare_bit_8	167	None	10
spare_bit_9	167	None	11
spare_bit_10	167	None	12
spare_bit_11	167	None	13
spare_bit_12	167	None	14
spare_bit_13	167	None	15
spare_bit_14	167	None	16
spare_bit_15	167	None	17
spare_bit_16	167	None	18
spare_bit_17	167	None	19
spare_bit_18	167	None	20
spare_bit_19	167	None	21
spare_bit_20	167	None	22
spare_bit_21	167	None	23
spare_bit_22	167	None	24
spare_bit_23	167	None	25
spare_bit_24	167	None	26
spare_bit_25	167	None	27
spare_bit_26	167	None	28
spare_bit_27	167	None	29
spare_bit_28	167	None	30
spare_bit_29	167	None	31
reshift_records	170	None	0-192
irom_patch	176	None	0-2560

irom_patch

RAM:00000000 ; =============== S U B R O U T I N E =======================================
RAM:00000000
RAM:00000000
RAM:00000000 irom_svc_dispatch
RAM:00000000   STMFD   SP!, {R0-R2}                  ; ipatches:
RAM:00000000                                         ;  0: 0x085bdf00 0x001010b6 0x0000df00 : svc #0x00 (offset 0x48)
RAM:00000000                                         ; 
RAM:00000000                                         ;  0: 0x12d3df06 0x001025a6 0x0000df06 : svc #0x06 (offset 0x54)
RAM:00000000                                         ;  1: 0x28144770 0x00105028 0x00004770 : bx lr
RAM:00000000                                         ;  2: 0x0fb72001 0x00101f6e 0x00002001 : movs r0, #0x01
RAM:00000000                                         ;  3: 0x692ddf15 0x0010d25a 0x0000df15 : svc #0x15 (offset 0x72)
RAM:00000000                                         ;  4: 0x436ddf1f 0x001086da 0x0000df1f : svc #0x1f (offset 0x86)
RAM:00000000                                         ;  5: 0x4376df23 0x001086ec 0x0000df23 : svc #0x23 (offset 0x8e)
RAM:00000000                                         ;  6: 0x4103df2b 0x00108206 0x0000df2b : svc #0x2b (offset 0x9e)
RAM:00000000                                         ;  7: 0x495c0060 0x001092b8 0x00000060 : lsls r0, r4, #1
RAM:00000000                                         ;  8: 0x62e3ef5b 0x0010c5c6 0x0000ef5b
RAM:00000000                                         ;  9: 0x10d1df6a 0x001021a2 0x0000df6a : svc #0x6a (offset 0x11c)
RAM:00000004   MOV     R2, LR
RAM:00000008   SUB     R2, R2, #2
RAM:0000000C   LDR     R2, [R2]
RAM:00000010   AND     R2, R2, #0xFF
RAM:00000014   MOV     R2, R2,LSL#1
RAM:00000018   LDR     R0, =0x10022C
RAM:0000001C   LDR     R1, =0x100174
RAM:00000020   SUB     R1, R1, R0
RAM:00000024   LDR     R0, =0x40004164
RAM:00000028   ADD     R0, R0, R1
RAM:0000002C   ADD     R2, R2, R0
RAM:00000030   ORR     R2, R2, #1
RAM:00000034   LDMFD   SP!, {R0,R1}
RAM:00000038   BX      R2
RAM:00000038 ; End of function irom_svc_dispatch
RAM:00000038
RAM:00000038 ; ---------------------------------------------------------------------------
RAM:0000003C dword_3C        DCD 0x10022C            ; DATA XREF: irom_svc_dispatch+18↑r
RAM:00000040 dword_40        DCD 0x100174            ; DATA XREF: irom_svc_dispatch+1C↑r
RAM:00000044 dword_44        DCD 0x40004164          ; DATA XREF: irom_svc_dispatch+24↑r
RAM:00000048   CODE16
RAM:00000048
RAM:00000048 ; =============== S U B R O U T I N E =======================================
RAM:00000048
RAM:00000048
RAM:00000048 sub_48                                  ; 0: 0x085bdf00 0x001010b6 0x0000df00 : svc #0x00 (offset 0x48)
RAM:00000048   CMP     R5, #0xAF
RAM:0000004A   BNE     loc_4E
RAM:0000004C   MOVS    R5, #0xFF
RAM:0000004E
RAM:0000004E loc_4E                                  ; CODE XREF: sub_48+2↑j
RAM:0000004E   SUBS    R6, R5, #1
RAM:00000050
RAM:00000050 loc_50                                  ; CODE XREF: sub_54+18↓j
RAM:00000050                                         ; sub_72+12↓j ...
RAM:00000050   POP     {R2}
RAM:00000052   MOV     PC, LR
RAM:00000052 ; End of function sub_48
RAM:00000052
RAM:00000054
RAM:00000054 ; =============== S U B R O U T I N E =======================================
RAM:00000054
RAM:00000054
RAM:00000054 sub_54                                  ; 0: 0x12d3df06 0x001025a6 0x0000df06 : svc #0x06 (offset 0x54)
RAM:00000054   MOVS    R3, #7
RAM:00000056
RAM:00000056 loc_56                                  ; CODE XREF: sub_72+10↓j
RAM:00000056                                         ; sub_8E+E↓j
RAM:00000056   PUSH    {R0,R1,R3-R6}
RAM:00000058   LDR     R0, =0x4000FC20
RAM:0000005A   LDR     R1, =0x40040000
RAM:0000005C   LDR     R3, =0xEAFFFFFE
RAM:0000005E   MOVS    R4, R3
RAM:00000060   MOVS    R5, R3
RAM:00000062   ADDS    R6, R3, #0
RAM:00000064
RAM:00000064 loc_64                                  ; CODE XREF: sub_54+14↓j
RAM:00000064   STMIA   R0!, {R3-R6}
RAM:00000066   CMP     R0, R1
RAM:00000068   BCC     loc_64
RAM:0000006A   POP     {R0,R1,R3-R6}
RAM:0000006C   B       loc_50
RAM:0000006C ; End of function sub_54
RAM:0000006C
RAM:0000006E ; ---------------------------------------------------------------------------
RAM:0000006E ; START OF FUNCTION CHUNK FOR sub_8E
RAM:0000006E
RAM:0000006E loc_6E                                  ; CODE XREF: sub_8E+8↓j
RAM:0000006E   LDR     R0, =0x1002A0
RAM:00000070   BX      R0
RAM:00000070 ; END OF FUNCTION CHUNK FOR sub_8E
RAM:00000072
RAM:00000072 ; =============== S U B R O U T I N E =======================================
RAM:00000072
RAM:00000072
RAM:00000072 sub_72                                  ; 3: 0x692ddf15 0x0010d25a 0x0000df15 : svc #0x15 (offset 0x72)
RAM:00000072   MOVS    R2, #2
RAM:00000074   CMP     R0, #0x26 ; '&'
RAM:00000076   BLS     loc_7A
RAM:00000078   ADDS    R2, #0x50 ; 'P'
RAM:0000007A
RAM:0000007A loc_7A                                  ; CODE XREF: sub_72+4↑j
RAM:0000007A   MOV     R3, LR
RAM:0000007C   ADDS    R3, R3, R2
RAM:0000007E   MOV     LR, R3
RAM:00000080   CMP     R0, #0
RAM:00000082   BNE     loc_56
RAM:00000084   B       loc_50
RAM:00000084 ; End of function sub_72
RAM:00000084
RAM:00000086
RAM:00000086 ; =============== S U B R O U T I N E =======================================
RAM:00000086
RAM:00000086
RAM:00000086 sub_86                                  ; 4: 0x436ddf1f 0x001086da 0x0000df1f : svc #0x1f (offset 0x86)
RAM:00000086
RAM:00000086 arg_8   =  8
RAM:00000086
RAM:00000086   MOVS    R3, R0
RAM:00000088   LDR     R2, =0x5A55F0E1
RAM:0000008A   STR     R2, [SP,#arg_8]
RAM:0000008C   B       loc_50
RAM:0000008C ; End of function sub_86
RAM:0000008C
RAM:0000008E
RAM:0000008E ; =============== S U B R O U T I N E =======================================
RAM:0000008E
RAM:0000008E
RAM:0000008E sub_8E                                  ; 5: 0x4376df23 0x001086ec 0x0000df23 : svc #0x23 (offset 0x8e)
RAM:0000008E
RAM:0000008E arg_8   =  8
RAM:0000008E
RAM:0000008E ; FUNCTION CHUNK AT RAM:0000006E SIZE 00000004 BYTES
RAM:0000008E
RAM:0000008E   MOVS    R3, R0
RAM:00000090   LDR     R2, =0x5A55F0E1
RAM:00000092   LDR     R0, [SP,#arg_8]
RAM:00000094   CMP     R0, R2
RAM:00000096   BEQ     loc_6E
RAM:00000098   CMP     R0, #0
RAM:0000009A   BEQ     loc_50
RAM:0000009C   B       loc_56
RAM:0000009C ; End of function sub_8E
RAM:0000009C
RAM:0000009E
RAM:0000009E ; =============== S U B R O U T I N E =======================================
RAM:0000009E
RAM:0000009E
RAM:0000009E sub_9E                                  ; 6: 0x4103df2b 0x00108206 0x0000df2b : svc #0x2b (offset 0x9e)
RAM:0000009E   LDR     R0, =0x7000F900
RAM:000000A0   SUBS    R0, #0xD8
RAM:000000A2   MOVS    R2, #1
RAM:000000A4   STR     R2, [R0]
RAM:000000A6   LDR     R0, =0x7001231C
RAM:000000A8   LDR     R3, =0x7041231C
RAM:000000AA   MOVS    R1, #0xE0
RAM:000000AC   B       loc_B4
RAM:000000AE ; ---------------------------------------------------------------------------
RAM:000000AE
RAM:000000AE loc_AE                                  ; CODE XREF: sub_9E+2E↓j
RAM:000000AE   MOVS    R1, #0xF0
RAM:000000B0   B       loc_B4
RAM:000000B2 ; ---------------------------------------------------------------------------
RAM:000000B2
RAM:000000B2 loc_B2                                  ; CODE XREF: sub_9E+32↓j
RAM:000000B2   MOVS    R1, #0xC0
RAM:000000B4
RAM:000000B4 loc_B4                                  ; CODE XREF: sub_9E+E↑j
RAM:000000B4                                         ; sub_9E+12↑j
RAM:000000B4   MOVS    R4, #0
RAM:000000B6
RAM:000000B6 loc_B6                                  ; CODE XREF: sub_9E+28↓j
RAM:000000B6   MOVS    R2, #0
RAM:000000B8   STR     R1, [R0]
RAM:000000BA   STR     R2, [R0,#4]
RAM:000000BC   STR     R1, [R3]
RAM:000000BE   STR     R2, [R3,#4]
RAM:000000C0   ADDS    R1, #1
RAM:000000C2   ADDS    R4, #1
RAM:000000C4   CMP     R4, #7
RAM:000000C6   BLS     loc_B6
RAM:000000C8   LSRS    R1, R1, #4
RAM:000000CA   CMP     R1, #0xE
RAM:000000CC   BEQ     loc_AE
RAM:000000CE   CMP     R1, #0xF
RAM:000000D0   BEQ     loc_B2
RAM:000000D2   MOV     R5, LR
RAM:000000D4   MOVS    R0, #0
RAM:000000D6
RAM:000000D6 loc_D6                                  ; CODE XREF: sub_9E+56↓j
RAM:000000D6   MOVS    R1, #0xD
RAM:000000D8   MOVS    R2, #0
RAM:000000DA   MOVS    R3, #0xD
RAM:000000DC   PUSH    {R0-R3}
RAM:000000DE   LDR     R4, =0x40004164
RAM:000000E0   PUSH    {R2,R4}
RAM:000000E2   ADRL    R4, (loc_EC+1)
RAM:000000E6   MOV     LR, R4
RAM:000000E8   LDR     R4, =0x105A19
RAM:000000EA   BX      R4
RAM:000000EC
RAM:000000EC loc_EC                                  ; DATA XREF: sub_9E+44↑o
RAM:000000EC   ADD     SP, SP, #8
RAM:000000EE   POP     {R0-R3}
RAM:000000F0   ADDS    R0, #1
RAM:000000F2   CMP     R0, #1
RAM:000000F4   BEQ     loc_D6
RAM:000000F6   MOV     LR, R5
RAM:000000F8   LDR     R0, =0x4000FC20
RAM:000000FA   MOV     R8, R0
RAM:000000FC   B       loc_50
RAM:000000FC ; End of function sub_9E
RAM:000000FC
RAM:000000FE
RAM:000000FE ; =============== S U B R O U T I N E =======================================
RAM:000000FE
RAM:000000FE
RAM:000000FE sub_FE
RAM:000000FE   POP     {R2}
RAM:00000100   MOV     R4, SP
RAM:00000102   SUBS    R4, R4, R0
RAM:00000104   BLS     loc_10C
RAM:00000106   CMP     R4, R2
RAM:00000108   BCS     loc_118
RAM:0000010A   B       loc_116
RAM:0000010C ; ---------------------------------------------------------------------------
RAM:0000010C
RAM:0000010C loc_10C                                 ; CODE XREF: sub_FE+6↑j
RAM:0000010C   LDR     R4, =0x4000BE68
RAM:0000010E   SUBS    R4, R4, R0
RAM:00000110   BLS     loc_118
RAM:00000112   CMP     R4, R2
RAM:00000114   BCS     loc_118
RAM:00000116
RAM:00000116 loc_116                                 ; CODE XREF: sub_FE+C↑j
RAM:00000116   ADDS    R2, R4, #0
RAM:00000118
RAM:00000118 loc_118                                 ; CODE XREF: sub_FE+A↑j
RAM:00000118                                         ; sub_FE+12↑j ...
RAM:00000118   SUBS    R3, R0, R1
RAM:0000011A   BX      LR
RAM:0000011A ; End of function sub_FE
RAM:0000011A
RAM:0000011C
RAM:0000011C ; =============== S U B R O U T I N E =======================================
RAM:0000011C
RAM:0000011C
RAM:0000011C sub_11C                                 ; 9: 0x10d1df6a 0x001021a2 0x0000df6a : svc #0x6a (offset 0x11c)
RAM:0000011C   SUBS    R3, #5
RAM:0000011E   MOVS    R2, #0xF0
RAM:00000120   BICS    R2, R3
RAM:00000122   B       loc_50
RAM:00000122 ; End of function sub_11C
RAM:00000122
RAM:00000122 ; ---------------------------------------------------------------------------
RAM:00000124 dword_124       DCD 0x4000FC20          ; DATA XREF: sub_54+4↑r
RAM:00000124                                         ; sub_9E+5A↑r
RAM:00000128 dword_128       DCD 0x40040000          ; DATA XREF: sub_54+6↑r
RAM:0000012C dword_12C       DCD 0xEAFFFFFE          ; DATA XREF: sub_54+8↑r
RAM:00000130 off_130         DCD 0x1002A0            ; DATA XREF: sub_8E:loc_6E↑r
RAM:00000134 dword_134       DCD 0x5A55F0E1          ; DATA XREF: sub_86+2↑r
RAM:00000134                                         ; sub_8E+2↑r
RAM:00000138 dword_138       DCD 0x7000F900          ; DATA XREF: sub_9E↑r
RAM:0000013C off_13C         DCD 0x7001231C          ; DATA XREF: sub_9E+8↑r
RAM:00000140 off_140         DCD 0x7041231C          ; DATA XREF: sub_9E+A↑r
RAM:00000144 dword_144       DCD 0x40004164          ; DATA XREF: sub_9E+40↑r
RAM:00000148 off_148         DCD 0x105A19            ; DATA XREF: sub_9E+4A↑r
RAM:0000014C dword_14C       DCD 0x4000BE68          ; DATA XREF: sub_FE:loc_10C↑r
RAM:0000014C ; RAM           ends

First IROM patch

This patch is applied to the bootrom IPATCH handling function so that more patches can be loaded from fuses.

 if (patch_start_addr == 0xAF) {
     patch_start_addr = 0xFF;
 }
 
 patch_start_addr--;
 
 return;

IROM patch 0

This patch initializes all unused IRAM memory to 0xEAFFFFFE (infinite loop instruction).

 /*
     Untranslated instructions:
 
     MOVS    R3, #7
     PUSH    {R0,R1,R3-R6}
 */
 
 for (u32 addr = 0x4000FC20; addr < 0x40040000; addr += 0x04) {
     *(u32 *)addr = 0xEAFFFFFE;
 }
 
 /*
     Untranslated instructions:
 
     POP     {R0,R1,R3-R6}
 */
 
 return;

Anti-downgrade

The first bootloader verifies FUSE_RESERVED_ODM7 to prevent downgrading. How many fuses are expected to be burnt depends the device's unit type as below.

System version	Expected number of burnt fuses (production)	Expected number of burnt fuses (development)
1.0.0	1	0
2.0.0-2.3.0	2	0
3.0.0	3	1
3.0.1-3.0.2	4	1
4.0.0-4.1.0	5	1
5.0.0-5.1.0	6	1
6.0.0-6.1.0	7	1
6.2.0	8	1
7.0.0-8.0.1	9	1
8.1.0	10	1
9.0.0-9.0.1	11	1
9.1.0-9.2.0	12	1
10.0.0-10.2.0	13	1
11.0.0-12.0.1	14	1
12.0.2-13.1.0	15	1
13.2.1-14.1.2	16	1
15.0.0-15.0.1	17	1
16.0.0-16.1.0	18	1
17.0.0-18.1.0	19	1

If too many fuses are burnt the bootloader will panic immediately.

If too few are burnt, the bootloader will enable fuse programming and write the expected value to fuses reserved_odm6 and reserved_odm7. Afterwards, fuse programming is disabled and the panic value 0x21 is written to PMC_SCRATCH200 register (0x7000EC40). Finally, the watchdog timer is initialized and programmed to force a reset.

On a subsequent boot, after the anti-downgrade fuses are checked again, the PMC_RST_STATUS register (0x7000E5B4) is checked and if set to 0x01 (watchdog reset) the PMC_SCRATCH200 register (0x7000EC40) will be checked for the panic value 0x21. PMC_RST_STATUS will only be set back to 0 (power on reset) if the fuse count matches the new expected value, otherwise the system will panic.

Fuses

Registers

Erista

Driver

FUSE_FUSECTRL

FUSE_FUSEADDR

FUSE_FUSERDATA

FUSE_FUSEWDATA

FUSE_FUSETIME_RD1

FUSE_FUSETIME_RD2

FUSE_FUSETIME_PGM1

FUSE_FUSETIME_PGM2

FUSE_PRIV2INTFC_START

FUSE_FUSEBYPASS

FUSE_PRIVATEKEYDISABLE

FUSE_DISABLEREGPROGRAM

FUSE_WRITE_ACCESS_SW

FUSE_PRIV2RESHIFT

FUSE_FUSETIME_RD3

FUSE_PRIVATE_KEY0_NONZERO

FUSE_PRIVATE_KEY1_NONZERO

FUSE_PRIVATE_KEY2_NONZERO

FUSE_PRIVATE_KEY3_NONZERO

FUSE_PRIVATE_KEY4_NONZERO

Cache

FUSE_SKU_INFO

FUSE_OPT_FT_REV

FUSE_SOC_SPEEDO_1_CALIB

FUSE_FA

FUSE_PUBLIC_KEY

FUSE_OPT_CP_REV

FUSE_PRIVATE_KEY

FUSE_ARM_JTAG_DIS

FUSE_RESERVED_SW

FUSE_RESERVED_ODM0

FUSE_RESERVED_ODM1

FUSE_RESERVED_ODM2

FUSE_RESERVED_ODM3

FUSE_RESERVED_ODM4

FUSE_RESERVED_ODM5

FUSE_RESERVED_ODM6

FUSE_RESERVED_ODM7

FUSE_SKU_DIRECT_CONFIG

FUSE_OPT_SEC_DEBUG_EN

FUSE_OPT_PRIV_SEC_DIS

FUSE_PKC_DISABLE

FUSE_ODM_INFO

FUSE_ECO_RESERVE_0

FUSE_SPARE_BIT_2

FUSE_SPARE_BIT_3

FUSE_SPARE_BIT_4

FUSE_SPARE_BIT_5

Mariko

Driver

FUSE_SPARE_ADDR_START

Cache

FUSE_KEK

FUSE_BEK

FUSE_RESERVED_PRODUCTION

FUSE_OPT_NVJTAG_PROTECTION_ENABLE

FUSE_RESERVED_ODM28

FUSE_BOOT_SECURITY_INFO

Bitmap

Erista

reserved_odm6

reserved_odm7

irom_patch

IROM patch 0

IROM patch 1

IROM patch 2

IROM patch 3

IROM patch 4

IROM patch 5

IROM patch 6

IROM patch 7

IROM patch 8

IROM patches 9 and 10

IROM patch 11

Mariko

irom_patch