Devices

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Note for ioctls: * indicates name is assumed from RE and may not be accurate.

Device Listing

Note: only unique devices are listed. Benign devices like /dev/null are omitted for brevity's sake.

Path Device Name Notes
/dev/a53{io,mm,mmsys} A53 Input/Output, Memory Management (sys) See MP4 section
/dev/ajm{i} Audio Job Manager -
/dev/auditpipe - -
/dev/authmgr - -
/dev/az{1,ctl} - Audio-related
/dev/bar Backup and Restore Used by shellcore for backup and recovery
/dev/bfs/ctl - -
/dev/bluetooth_hid - -
/dev/bt - -
/dev/camera Camera -
/dev/cloudsd Cloud SaveData -
/dev/console Console Usermode logging
/dev/crepo Crash Report Used for crash reporting service (coredump, gpudump, shellcore)
/dev/ctrlp{_sync} - Used by libScePad (controller)
/dev/dbggc{_control} Debug GPU? -
/dev/deci_coredump Debug Com. Interface (DECI) coredump -
/dev/deci_mp4_ioc DECI I/O Control? -
/dev/deci_mp4_mmc - -
/dev/deci_std{in,out,err} DECI Input/Output/Error -
/dev/deci_tty* DECI Terminals -
/dev/devctl - -
/dev/diag - -
/dev/dipsw Dip Switch -
/dev/dldbg Dynamic Library Debug -
/dev/dmem{0,1,2} - -
/dev/dngl - -
/dev/duid Disc Unique ID -
/dev/encdec EncDec -
/dev/envelope Envelope Format Crypto -
/dev/evlg{0,1} Event Log Intended to be used with read syscall
/dev/exthdd External HDD -
/dev/fcram - -
/dev/fsctrl - -
/dev/fttrm - Used by bluray app
/dev/gbase - -
/dev/gc GPU command -
/dev/geom.ctl - -
/dev/gic - -
/dev/gsched_bds.ctl - -
/dev/hdmi HDMI -
/dev/hid - -
/dev/hmd2_* VR 2? -
/dev/hmd_* VR -
/dev/iccnvs{0,1,2,4,6} - -
/dev/icc_configuration ICC Config -
/dev/icc_crash_report ICC Crash Report -
/dev/icc_device_power ICC Device Power -
/dev/icc_fan ICC Fan -
/dev/icc_floyd ICC TPM? SNVS Storage Device
/dev/icc_indicator ICC LED -
/dev/icc_nvs ICC NVS -
/dev/icc_power ICC Power -
/dev/icc_sc_config ICC Syscon? Config -
/dev/icc_thermal ICC Thermal -
/dev/klog Kernel Log Read syscall on this device can be used to get kernel log if privileged
/dev/kmbp - -
/dev/lvdctl - -
/dev/lvd{0,1} - -
/dev/m2.ctl m.2 NVMe Control? -
/dev/mbus Event bus -
/dev/mbus_av Event bus (audio video?) -
/dev/md0 - -
/dev/md2 - -
/dev/mdctl - -
/dev/metadbg - -
/dev/mp1 System Management Unit (SMU) Power management, thermals, etc. (see mp1 section)
/dev/mp3 Trusted Execution Environment (TEE) See mp3 section
/dev/mp4/dump{_for_decid} A53 (mdbg?) See mp4 section
/dev/notification{0-9} Notification -
/dev/npdrm - -
/dev/nsfsctl Namespace Filesystem (NSFS) Control -
/dev/nsid1.ctl - -
/dev/otpaccess One-Time Programmable Access? -
/dev/pfsctldev Playstation Filesystem (PFS) Control -
/dev/pfsmgr PFS Manager Used for trophies, savegames, keystone
/dev/playgo_emu_param{1,2,3} PlayGo emulator params -
/dev/pltauth{0,1} - -
/dev/pup_update0 PUP Update -
/dev/qafutkn QA flag / utoken -
/dev/rnps React Native PS PSN related
/dev/rootparam Root Param Used by shellcore for verifying root param sfo/json
/dev/s3da 3D Audio -
/dev/sbl_secreg - -
/dev/sbl_srv - Used by playready
/dev/scanin - -
/dev/sce_zlib{_sys} zlib zlib (de)compression
/dev/sc_fw_update0 (syscon?) firmware update -
/dev/sflash0 SPI flash 2MB. Has EMC firmware and (non-secure) NVS.
/dev/srtc - -
/dev/ssd0.* Internal SSD partitions -
/dev/sshot Screenshot -
/dev/transactionid.ctl - -
/dev/ufssuspend - -
/dev/usbctl USB control -
/dev/uvd_{dec/enc/bgt} Unified Video Decoder? -
/dev/wlanbt - -
/dev/xtp0 - -

Platform Security Processor Core (PSP) (MP0)

  • All the fun things are here
  • Named SMU PSP as well
  • Named ASP as well (AMD Secure Processor)

System Management Unit (SMU) (MP1)

MP1 (System Management Unit or "SMU") is an xtensa CPU responsible for power management, clock management, sampling sensor data, and other power/thermal-related tasks. The /dev/mp1 device can be used to issue commands to it. Below are known commands.

IOCTL # Name Notes
0x4068AE01 MP1_IOCTL_GET_CLK Get clock frequency
0x8004AE17 MP1_IOCTL_SET_GFXCLK Set graphics clock frequency
0xC004AE18 MP1_IOCTL_REQUEST_MODE_SWITCH -
0x8008AE1D MP1_IOCTL_SET_COREPSTATE Set core power state?
0xC00CAE1E MP1_IOCTL_GET_COREPSTATE Get core power state?

Sensor Fusion Processor (SFP) (MP2)

  • doesn't exist on ps5
  • mainly for mobiles

Trusted Execution Environment (TEE) (MP3)

MP3 consists of the Trusted Execution Environment (TEE) running on the AMD Platform Security Processor (PSP/SP). Its primary function is Digital Rights Management (DRM) via PlayReady SL3000. In userspace, the libSceTEEClient library is used for interfacing with it, which internally uses /dev/mp3 to load secure binaries (sbins) and establish sessions. Below are known commands.

IOCTL # Name Notes
0xC010B403 TEE_IOC_INVOKE Invoke commands
0xC010B408 TEE_IOC_DLM_GET_DEBUG_TOKEN -
0xC028B409 TEE_IOC_DLM_START_TA_DEBUG -
0xC110B40A TEE_IOC_DLM_FETCH_DEBUG_STRING -
0x8008B40B TEE_IOC_DLM_STOP_TA_DEBUG -
0x8008B40B TEE_IOC_INIT_ASD -
0xC038B40C TEE_SHM_REGISTER -
0xC004B40E TEE_SHM_RELEASE -
0xC004B40F TEE_SET_TIMEOUT -

A53MM/A53IO (MP4)

MP4, which consists of /dev/a53mm, /dev/a53mmsys, and /dev/a53io, is used for various tasks, and its overall purpose is not fully understood. Some of the things it includes are debugging (mdbg), video encode/decode, and other various memory-management related things. Below are known commands.

a53mm

IOCTL # Name Notes
0xC004AC01 - -
0xC030AC02 A53MM_GIVE_DIRECT_MEM_TO_MAPPER -
0xC030AC03 A53MM_CALL_INDIRECT_BUFFER -
0xC050AC05 A53MM_MAPPER_VIRTUAL_QUERY -
0xC038AC06 A53MM_GET_PARAM * -
0xC018AC07 - -
0xC004AC08 - -
0xC018AC09 - -
0xC010AC0A - -
0xC018AC0B A53MM_MAPPER_QUERY_PA -
0xC004AC0D A53MM_WAIT_COMMAND_BUFFER_COMPLETION -
0xC018AC0E A53MM_INTERNAL_LOCK_UNLOCK_MAPPER_MEMORY -
0xC018AC0F - -
0xC018AC10 A53MM_GET_USAGE_STATS_DATA -
0xC004AC11 A53MM_SET_PAGE_TABLE_POOL_OCCUPANCY_THRESHOLD -
0xC018AC12 A53MM_INTERNAL_TEST_PAGE_MIGRATION -
0xC004AC13 - -

a53mmsys

IOCTL # Name Notes
0xc020b501 A53MMSYS_INTERNAL_LOCK_UNLOCK_MAPPER_MEMORY -
0xc028b502 - -
0xc050b503 - -
0xc010b504 - -
0xc028b505 A53MMSYS_MAPPER_GET_INDIRECT_BUFFER_INFO -
0xc020b506 - -
0xc018b507 - -
0xc018b508 A53MMSYS_DEBUG_MAPPER_QUERY_DMEM_OFFSET -
0xc020b50a - -
0xc010b50b A53MMSYS_DEBUG_GET_AMPR_COUNTER_INFO -

a53io

IOCTL # Name Notes
0xC03861A1 BFS_A53IO_READ_BLOCK -
0xC03861A2 BFS_A53IO_WRITE_BLOCK -

Backup and Restore

Backup and Restore (BAR) is used by shellcore via /dev/bar. Below are known commands.

IOCTL # Name Notes
0xC0684201 BAR_CREATE_CONTEXT -
0xC0684202 BAR_DESTROY_CONTEXT * -
0xC0684203 BAR_INIT_CONTEXT -
0xC0684204 BAR_UPDATE_AAD -
0xC0684205 BAR_UPDATE_ENCRYPT -
0xC0684206 BAR_UPDATE_DECRYPT -
0xC0684207 BAR_FINISH_ENCRYPT -
0xC0684208 BAR_FINISH_DECRYPT -

Disc UID

Disc UID (/dev/duid) has its own library (libSceDiscId). It's unknown what this is used for at present. It has 2 known ioctls.

IOCTL # Name Notes
0xC0104401 DISC_ID_GET -
0xC0104402 DISC_ID_GET2 -

Dynamic Library Debug

Dynamic Lib Debug (/dev/dldbg) is used by the library for debugging syscore. Given the name, it's likely used for debugging sprx libs. Below are known commands.

IOCTL # Name Notes
0x80084401 DLDBG_STOP_ON_DL_LOAD -
0x80084402 DLDBG_NO_STOP_ON_DL_LOAD -
0xC0084403 DLDBG_GET_DL_LOAD_FLAG -

FTTRM

FTTRM's full purpose is unknown, but it's likely DRM-related. It's used by the Bluray app (BdmvPlayerCore, BdvdPlayerCore, UHDBdPlayerCore) via /dev/fttrm. There are only 2 known commands.

IOCTL # Name Notes
0xC0185301 FTTRM_READ_SECTOR -
0xC0185302 FTTRM_WRITE_SECTOR -

ICC Floyd (TPM)

The /dev/icc_floyd is for interacting with the floyd Trusted Platform Module (TPM) over ICC. It only has one known command.

IOCTL # Name Notes
0x400EB701 ICC_FLOYD_GET_VERSION -

Namespace Filesystem Control

The Namespace Filesystem (NSFS) is used by Virtual Shell (Vsh) and shellcore. It's critical to processes running on the system. Below are known commands.

IOCTL # Name Notes
0xC0406E00 NSFS_CREATE_REDIRECT -
0xC0406E01 NSFS_DELETE_REDIRECT -
0xC0186E02 NSFS_GET_REDIRECT_STATS -
0xC0206E03 NSFS_ADD_OVERLAY_TO_NAMESPACE -
0xC0186E04 NSFS_SET_GLOBAL_EXCLUDE -

PFS Control

Playstation Filesystem (PFS) Control and /dev/pfsctldev is used internally for VSH. Below are known commands.

IOCTL # Name Notes
0x8030B001 DEVPFSCTL_FORMAT -
0xC0E0B006 DEVPFSCTL_GETFSSTAT -
0xC040B008 DEVPFSCTL_MOUNT -
0xC038B009 DEVPFSCTL_UNMOUNT -
0xC028B00A DEVPFSCTL_GETEVENT -
0xC030B00B DEVPFSCTL_EVENTCOMP -
0xC020B00C DEVPFSCTL_CANCELEVENT -
0xC020B00D DEVPFSCTL_REGEVENT -
0xC020B00E DEVPFSCTL_DEREGEVENT -
0x8004B00F DEVPFSCTL_SYSPOWEREVENT -
0xC008B074 DEVPFSCTL_FSCK -

PFS Manager

PFS Manager (/dev/pfsmgr) is used by shellcore. It handles trophy related tasks, savedata, and keystone verification. Below are known commands.

IOCTL # Name Notes
0xC1185001 - -
0xC1185002 - -
0xC1185003 - -
0xC4085004 - -
0x40845301 - - trophy related
0xC0845302 - - savedata related
0x40845303 - - savedata related
0xC0845304 - - ???
0xC0845305 - - ???
0xC0A84B01 - - ???
0xC0A84B02 PFSMGR_VERIFY_KEYSTONE -

Root Param

Root Param is used by shellcore to verify root param sfos (for PS4) or jsons (for PS5, aka PPR for ProsPeRo). Below are known commands.

IOCTL # Name Notes
0xC0305201 ROOTPARAM_VERIFY_PS4_ROOT_PARAM -
0xC0305202 ROOTPARAM_VERIFY_PPR_ROOT_PARAM -
0xC0305203 ROOTPARAM_RESUME_FROM_STANDBY -
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