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The sysroot buffer is a <code>0x100 or 0x200</code> sized buffer passed to the secure kernel bootloader in the scratch space and contains all sorts of flags and system parameters. This buffer is copied to the secure kernel, the non-secure kernel loader, and the non-secure kernel and is used by many functions to check for features that are enabled for the system.
The KBL Param buffer (temporary name was sysroot buffer) is a <code>0x100 or 0x200</code> bytes sized buffer passed to the Secure Kernel BootLoader in the scratch space and contains all sorts of flags and system parameters. This buffer is created in [[Second Loader]] copied to [[Secure Kernel]], passed to the Secure and Non-Secure Kernel BootLoaders, and finally to the non-secure kernel. It is used in many functions to check for features that are enabled for the system. The strategy in this buffer is to compute once for all the information that is often used, to share it between all security layers not to have to implement generator code many times, and to implement the generation code in the most secure layer: second_loader (excluding first_loader but that's because first_loader is not updatable and has minimum code).
 
== Structure ==


{| class="wikitable"
{| class="wikitable"
! Offset !! Size !! Description
! Offset !! Size !! Set by !! Description
|-
| 0x0 || 0x2 || second_loader || Version (usually 1)
|-
| 0x2 || 0x2 || second_loader || Size. Size of this structure. 0x100 or 0x200.
|-
| 0x4 || 0x4 || second_loader || Current Firmware Version
|-
| 0x8 || 0x4 || second_loader || Minimum Firmware Version. Comes from SMI IdStorage leaf.
|-
| 0xC || 0x4 || Unknown || Unknown
|-
| 0x10 || 0x4 || Unknown || Used for Kit Activation. If lower than 0x20, the Kit is fake activated (License Status = 0, Issue No = 0, Expire Date = 0xffffffff). If lower than 0x30, default bus error handler is not registered in [[SceKernelBusError]].
|-
| 0x14 || 0xC || Unknown || maybe unused
|-
|-
| 0x0 || 0x2 || Version (usually 1)
| 0x20 || 0x10 || second_loader || [[KBL Param#QA flags|QA flags]]
|-
|-
| 0x2 || 0x2 || Sysroot size (0x100 or 0x200)
| 0x30 || 0x10 || second_loader || [[KBL Param#Boot flags|Boot flags]]
|-
|-
| 0x4 || 0x4 || Current Firmware Version
| 0x40 || 0x20 || second_loader || [[KBL Param#DIP Switches|DIP Switches]]
|-
|-
| 0x8 || 0x4 || Factory Firmware Version
| 0x60 || 0x4 || second_loader || DRAM base paddr (0x40000000)
|-
|-
| 0xC || 0x14 || unk
| 0x64 || 0x4 || second_loader || DRAM size (0x20000000 on retail and testkit, 0x40000000 on DevKit in DevKit Memory Size mode)
|-
|-
| 0x20 || 0x20 || [[Sysroot#Bitfield flags|Bitfield flags]]
| 0x68 || 0x4 || Unknown || unk
|-
|-
| 0x40 || 0x20 || [[Sysroot#DIP Switches|DIP Switches]]
| 0x6C || 0x4 || second_loader || [[KBL Param#Boot type indicator 1|Boot type indicator 1]]
|-
|-
| 0x60 || 0x4 || DRAM base paddr (0x40000000)
| 0x70 || 0x10 || second_loader || [[OpenPsId]]. Comes from [[IdStorage]].
|-
|-
| 0x64 || 0x4 || DRAM size (0x20000000 on retail and testkit, 0x40000000 on DevKit)
| 0x80 || 0x4 || second_loader || <code>secure_kernel.enp</code> raw data paddr (optional)
|-
|-
| 0x68 || 0x4 || unk
| 0x84 || 0x4 || second_loader || <code>secure_kernel.enp</code> size (optional)
|-
|-
| 0x6C || 0x4 || Boot type indicator 1 (0x20000 on resume - no boot logo, 0x1 on boot - boot logo, 0x4 manufacturing mode)
| 0x88 || 0x4 || second_loader || <code>context_auth_sm.self</code> raw data paddr
|-
|-
| 0x70 || 0x10 || [[OpenPsId]]
| 0x8C || 0x4 || second_loader || <code>context_auth_sm.self</code> size
|-
|-
| 0x80 || 0x4 || <code>secure_kernel.enp</code> raw data paddr (optional)
| 0x90 || 0x4 || second_loader || <code>kprx_auth_sm.self</code> raw data paddr
|-
|-
| 0x84 || 0x4 || <code>secure_kernel.enp</code> size (optional)
| 0x94 || 0x4 || second_loader || <code>kprx_auth_sm.self</code> size
|-
|-
| 0x88 || 0x8 || unk
| 0x98 || 0x4 || second_loader || <code>prog_rvk.srvk</code> raw data paddr
|-
|-
| 0x90 || 0x4 || <code>kprx_auth_sm.self</code> raw data paddr
| 0x9C || 0x4 || second_loader || <code>prog_rvk.srvk</code> size
|-
|-
| 0x94 || 0x4 || <code>kprx_auth_sm.self</code> size
| 0xA0 || 0x8 || second_loader || [[PsCode]]. Comes from [[IdStorage]].
|-
|-
| 0x98 || 0x4 || <code>prog_rvk.srvk</code> raw data paddr
| 0xA8 || 0x4 || second_loader || __stack_chk_guard. Set by Second Loader to a pseudo random number. Exported by SceSysmem as __stack_chk_guard.
|-
|-
| 0x9C || 0x4 || <code>prog_rvk.srvk</code> size
| 0xAC || 0x4 || second_loader || Unknown. Set by Second Loader to a pseudo random number.
|-
|-
| 0xA0 || 0x8 || [[PSCode]]
| 0xB0 || 0x10 || second_loader || Session ID
|-
|-
| 0xA8 || 0x8 || unk
| 0xC0 || 0x4 || second_loader || [[KBL Param#Sleep Factor|Sleep Factor]]. Comes from Syscon command 3.
|-
|-
| 0xB0 || 0x10 || Session ID
| 0xC4 || 0x4 || second_loader || [[KBL Param#Wakeup Factor|Wakeup Factor]]. Comes from Syscon command 0x10.
|-
|-
| 0xC0 || 0x4 || unk
| 0xC8 || 0x4 || second_loader || Unknown, contains USB info. Comes from Syscon command 0x800 (?device model dependant?). (ex: 0x40 PS Vita usually, 0x60 PS TV usually, 0x64 DEM-3000H, 0x1C0 PC USB -> charge USB on FAT, 0x2D2 PC USB -> USB -> charge USB on FAT, 0x2D3 charge USB on FAT, 0x3D2, 0xC001C0 USB charge on SLIM, 0xC503D2 USB charge on SLIM, 0xC501CA USB data to PC)
|-
|-
| 0xC4 || 0x4 || [[Suspend#Wakeup factor|Wakeup factor]]
| 0xCC || 0x4 || second_loader || [[KBL Param#Boot Controls Info|Boot Controls Info]]. Comes from Syscon command 0x100.
|-
|-
| 0xC8 || 0x4 || unk (?Device model dependant?) (ex: 0x40, 0x60, 0x64, 0xC001C0)
| 0xD0 || 0x4 || second_loader || <code>suspendinfo_adr</code>. [[Suspend|Resume context]] physical address. Comes from Syscon command 0x90, Scratch Pad offset 0xC.
|-
|-
| 0xCC || 0x4 || unk (0x74FFFFFF on coldboot, 0x74FFBFFF on warmboot)
| 0xD4 || 0x4 || second_loader || [[KBL Param#Hardware Info|Hardware Info]]. Comes from Syscon command 5.
|-
|-
| 0xD0 || 0x4 || [[Suspend|Saved context]] paddr
| 0xD8 || 0x4 || second_loader || [[KBL Param#Power Info|Power Info]]
|-
|-
| 0xD4 || 0x4 || [[Sysroot#Hardware info|Hardware info]]
| 0xDC || 0x4 || Unknown || unk
|-
|-
| 0xD8 || 0x4 || [[Sysroot#Boot type indicator 2|Boot type indicator 2]]
| 0xE0 || 0x4 || second_loader, SceDriverTzs || If resume, always 0 (second_loader).
|-
|-
| 0xDC || 0xC || unk
| 0xE4 || 0x4 || Unknown || unk
|-
|-
| 0xE8 || 0x10 || [[Sysroot#Hardware flags|Hardware flags]]
| 0xE8 || 0x10 || second_loader || [[KBL Param#Hardware Info 2|Hardware Info 2]]. Comes from Syscon command 6.
|-
|-
| 0xF8 || 0x4 || BootLoader Revision
| 0xF8 || 0x4 || second_loader || BootLoader Revision
|-
|-
| 0xFC || 0x4 || Sysroot Magic value (0xCBAC03AA)
| 0xFC || 0x4 || Unknown || KBL Param Magic value (0xCBAC03AA)
|-
|-
| 0x100 || 0x20 || Encrypted Session Key (FW 2.12+)
| 0x100 || 0x20 || second_loader || Coredump Encrypted Session Key (FW 2.12+)
|}
|}


== Bitfield flags ==
== QA flags ==
 
The steps to install QA flags on a PS Vita are:
Write Qaf token to NVS at offset 0x400 (0x80-bytes) (tied to Console ID).
Write Qaf token RSA signature to NVS at offset 0x5A0 (0x100-bytes) (only required on firmware 1.80 and above).
Write Qaf version to SNVS sector 0x15.
Clear Qaf inhibit DIP switches 240 and 241 (maybe even more DIP switches inhibit QA flags).
Write Qaf enable flag to NVS at offset 0x480.
Set Qaf ON flag to SNVS mgmt sector.
 
The following libraries are available for checking QA Flags
 
[[SceSblSsMgr#SceSblQafMgr|SceSblQafMgr]]
 
[[SceSysmem#SceSblQafMgrForDriver|SceSblQafMgrForDriver]]
 
[[SceVshBridge#SceVshBridge|SceVshBridge]]
 
In the following table bytes are counted from left to right and bits from left to right too (little-endian). However the OS uses bit masking for QA flags (unlike bit shifting for DIP Switches).


{| class="wikitable"
{| class="wikitable"
|-
|-
! Bit !! Description
! Byte (0-0xF) - mask = 1 << (bit_no & 7) !! Used in !! Description
|-
| rowspan="2" | Byte 0x0 > Mask 1
| update_service_sm
| rowspan="2" | Skip System Update version check on CEX (but still there Manufacturing mode checks).
|-
| spkg_verifier_sm_w_key_2
|-
| Byte 0x0 > Mask 2 || Unknown || -
|-
| Byte 0x0 > Mask 0x10 || SceNpDrm || Allow Finalized Retail Package on Non CEX unit without StoreFlag.
|-
| Byte 0x0 > Mask 0x20 || Unknown || -
|-
| Byte 0x6 > Mask 1 || Unknown || -
|-
| rowspan="7" | Byte 0x6 > Mask 2
| To check
| Allow Dtcp Ip Reset, Allow NearTest/PSPEmuShowQAInfo (SceVshBridge)
|-
| SceShell
| Allow Fake AC Install, Allow Show Title Upgrade Info, Allow Liblocation Change Model on CEX, Allow ScreenShot Always.
|-
| SceRtc
| Allow something on sceRtcGetCurrentAdNetworkTickForDriver
|-
| SceStoreBrowser
| rowspan="2" | Allow Limited Debug Menu Display
|-
| SceSettings
|-
| SceNpCommon
| Allow Np Full Test
|-
| SceIduUpdate
| Allow Control Idu Auto Update
|-
| Byte 0x6 > Mask 4 || Unknown || -
|-
| Byte 0x6 > Mask 8 || Unknown || -
|-
| Byte 0x7 > Mask 1 || Unknown || -
|-
| Byte 0x7 > Mask 4 || Unknown || -
|-
| Byte 0x8 > Mask 1 || Unknown || -
|-
| Byte 0x8 > Mask 2 || Unknown || -
|-
| Byte 0x8 > Mask 4 || Unknown || -
|-
| Byte 0x8 > Mask 0x10 || Unknown || -
|-
| Byte 0x8 > Mask 0x20 || Unknown || -
|-
| Byte 0x8 > Mask 0x40 || Unknown || -
|-
| Byte 0x9 > Mask 1 || Used on FW 0.931 by SceSblACMgrForKernel_F7524073 || -
|-
| Byte 0xB > Mask 1 || Unknown || Unknown. Maybe to use alternate keyset (internal).
|-
| rowspan="3" | Byte 0xB > Mask 4
| kprx_auth_sm
| Use alternate keyset e.g. QA SPSFO key/NpDrm app key.
|-
| SceAppMgr
| Allow ignore app keystone error.
|-
| SceSblACMgr
| Allow User App Debug.
|-
| rowspan="3" | Byte 0xB > Mask 0x10
| secure_kernel
| Bypass platform (Test/Tool/Diag) requirement for loading of fSELF with attribute 128
|-
| SceSettings
| Allow EMPR via vshSblQafMgrIsAllowLoadMagicGate
|-
| SceDbRecovery
| -
|-
| rowspan="2" | Byte 0xC > Mask 2
| SceSettings
| Allow All Debug Menu Display, Allow RemotePlayDebug
|-
| SceGps
| Allow sceSblACMgrIsSystem bypass
|-
| rowspan="2" | Byte 0xC > Mask 4
| Updater
| Skip version checks in system updates
|-
| compat_sm
| Allow compat_sm operation on DevKit (can be use PspEmu)
|-
| rowspan="17" | Byte 0xD > Mask 1 : Allow Kernel Debug
| To check
| USB Enum Wake Up Debug Menu.
|-
| secure_kernel
| CMeP Debug.
|-
| NSKBL
| logging level set to 0 instead of 1/2, 1 instead of 2
|-
| rowspan="2" | SceSysmem
| Allow printing Syscall Frame info with module name + offset.
|-
| Allow Kernel Debug Level.
|-
| SceDeci4pSDrfp
| Allow starting this module.
|-
| SceDeci4pSCTtyp
| Allow starting this module.
|-
| SceDeci4pSDbgp
| Allow starting this module. Allow call to SceDeci4pSdbgpTest export function.
|-
| SceDeci4pSDfMgr
| Allow dumping the non encrypted .psp2kerndmp
|-
| SceDeci4pLoadp
| Allow load/unload/start/stop Kernel module.
|-
| SceDeci4pDtracep
| Allow disabled NID encode. Allow dtrace sysbreak. Allow all process dtrace. And more.
|-
| SceExcpmgr
| Allow printing module info with module name.
|-
| SceKernelModulemgr
| Allow dump the module load address (printing)
|-
| ScePamgr
| Allow more SyscallTrace flag.
|-
| SceHdmi
| Allow HDCP control by dipsw. Allow HDMI CEC on PS TV Emu.
|-
| SceAudio
| Allow something audio debug control by dipsw.
|-
| SceWlanBt
| Allow enable WlanBt on DEM-3000 (IRT-001) for Non IsTest unit and Non Product Mode
|-
| rowspan="13" | Byte 0xD > Mask 2 : Allow System Debug
| secure_kernel
| Allow to bypass absent Media Type 7 (host0:) in SELF attribute for usermode SELF.
|-
| SceAppMgr
| Dictates if you can pass arguments to sceAppMgrLaunchAppByPathForDriver
|-
| SceSysmodule
| rowspan="4" | Allow Remote Sysmodule Load (host0:)
|-
| SceParty
|-
| SceCommonDialogMain
|-
| SceShell
|-
| SceSysStateMgr
| Allow loading <code>host0:psp2config.rpath</code>.
|-
| SceDeci4pLoadp
| Allow any drive path.
|-
| SceKernelModulemgr
| Allow preloading module path switching by dipsw.
|-
| SceSysLibTrace
| Allow System NID symbol table refer.
|-
| SceSblACMgr
| Allow System App Debug
|-
| SceDeci4pDtracep
| Allow System App dtrace.
|-
| SceVshBridge (stub)
| Allow Marlin Test (SceVshBridge)
|-
| rowspan="7" | Byte 0xE > Mask 1 : Allow Module Debug
| second_loader
| Allow ignore SceKblPara->dipsw.ASLR initialize.
|-
| secure_kernel
| Allow to bypass absent Media Type 7 (host0:) in SELF attribute for Kernel/SM SELF.
|-
| NSKBL
| Allow Force Loading Boot Kernel Module in 100000 times on loadModule function.
|-
| SceSysStateMgr
| Allow loading <code>host0:psp2config.skprx</code>, Allow loading psp2config as plaintext. Allow loading <code>host0:psp2config.rpath</code>.
|-
| SceDeci4pLoadp
| Allow any drive path.
|-
| SceSblPostSsMgr
| Allow Remote SM Loading (host0:), Allow Remote Spfso Auth (host0:), Allow Remote FwLoader path switching by dipsw (host0:module/).
|-
| SceKernelModulemgr
| Allow Remote Kernel module Loading (host0:).
|-
| Byte 0xE - mask 2 || Unknown || Unknown
|-
| rowspan="15" | Byte 0xF > Mask 1
| secure_kernel
| Allow SELF attribute qaf::0xF::1 required
|-
| kprx_auth_sm
| Enable DMAC5 keyset for 0x10001
|-
| update_service_sm
| rowspan="3" | Allow QAUpdate
|-
| spkg_verifier_sm_w_key_2
|-
| SceSblUpdateMgr
|-
| SceSettings
| Minimum Debug Menu Display
|-
| SceCuiSetUpper
| rowspan="4" | Allow Non QAPup on CEX.
|-
| SceSafeMode
|-
| SceSettings
|-
| SceShell
|-
| SceNpDrm
| Allow Debug DRM Loose Bind.
|-
| SceNpCommon
| rowspan="2" | Allow Np Test
|-
| SceShell
|-
| SceRegistryMgr
| Allow more registry keys.
|-
| SceShell
| Allow Keep CoreFile
|-
| rowspan="3" | Byte 0xF > Mask 2 : Allow Force Update
| update_service_sm
| rowspan="3" | Skip the System Update's version checks and Manufacturing mode checks on CEX
|-
| spkg_verifier_sm_w_key_2
|-
|-
| 0x2C + bit 29 || Set to skip version checks in system updates
| SceSblUpdateMgr
|-
|-
| 0x2D + bit 30 || Checked by SceAppMgr. Dictates if you can pass arguments to sceAppMgrLaunchAppByPathForDriver
| Any QA flag || act_sm || Infinite Kit activation
|}
|}


=== QA flags ===
To check: Byte 0xF - mask 1, Byte 0xE - mask 1, Byte 0xE - mask 2, Byte 0xB - mask 0x10: Revocation related.


QA flags are some bit flags between 0x20 and 0x33.
Existing QA flag token templates identified thus far:


=== boot type flags ===
* NO_FLAGS: Default value with no QA flag set. Generated upon request on unit by qaf_sm using QAF keyslots set by second_loader, no signature.


*at 0x30: 0xFF - not update mode
* QAF_QATEAM_MINI_E: QA flags (mini) for QA Team units running External System Software. Set on DevKits.
*at 0x33: 0xFF - not safe mode
*at 0x35: FF on FAT - no internal storage, FE on PSTV or SLIM - internal storage


== Hardware Info ==
* QAF_QATEAM_FULL_E: QA flags (full) for QA Team units running External System Software. Set on Retail and TestKits. Same as QAF_QATEAM_MINI_E but with two more QA flags (Byte 0x0 - mask 0x10 and Byte 0x6 - mask 2) set. These supplementary QA flags allow features like: ScreenShot Always, Np Full Test, Limited Debug Menu Display.


Data is returned by [[SceSyscon]].
* QAF_SYS_DEV_I: QA flags (development) for System Software QA units running Internal System Software. Set on Development tools used for system debugging, running Internal firmware. Set on DevKits.


*00 60 41 00: PDEL-1XXX
* QAF_MGVIDEO_DEV_I: QA flags (development) for Magic Gate Video QA units running Internal System Software. Set on DevKits.
*00 60 40 00: PCH-10XX / PTEL-1XXXX
Basically the same as QAF_SYS_DEV_I, but with the addition of the AllowMagicGate flag. But the AllowKernelDebug flag is cleared.
*02 60 40 00: PCH-11XX
*38 22 82 00: PCH-2XXX model revision 0x18
*30 30 70 00: VTE-XXXX


=== Bit flags ===
* QAF_MGVIDEO_ADV_I: QA flags (advanced) for Magic Gate Video QA units running Internal System Software. Set on DevKits.
Basically the same as QAF_SYS_DEV_I, but with the addition of the AllowMagicGate flag.


2 PSTV Slim
<source>
3 PSTV Slim
flags for NO_FLAGS:
4 Slim
  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
9 Fat
flags for QAF_QATEAM_MINI_E:
10 always set
  01 00 00 00 00 00 0D 04 64 00 00 00 04 00 00 03
11 PSTV
flags for QAF_QATEAM_FULL_E:
16 Slim
  11 00 00 00 00 00 0F 04 64 00 00 00 04 00 00 03
17 PSTV Fat
flags for QAF_SYS_DEV_I:
18 PSTV
  33 00 00 00 00 00 07 05 73 01 00 01 06 03 03 01
19 PSTV
flags for QAF_MGVIDEO_DEV_I:
22 Slim
  33 00 00 00 00 00 07 05 73 01 00 11 06 02 03 01
23 ?Communication Processor?
flags for QAF_MGVIDEO_ADV_I:
  33 00 00 00 00 00 07 05 73 01 00 11 06 03 03 01
</source>


== Boot type indicator 2 ==
== Boot flags ==


=== Experimental point of view ===
These Boot flags come from [[Ernie#NVS|Ernie NVS]].
- No AC connected + No POWER Button pressed: 0x0
<br \>ex: rebooting by software PSVita when AC is not connected


- No AC connected + POWER Button pressed: 0x4
On FW 3.60, second_loader generates the boot flags as following:
<br \>ex: booting PSVita by pressing POWER button when AC is not connected
* byte 0 = read from NVS 0x4A0
* byte 1 = read from NVS 0x481
* byte 2 = zeroed
* byte 3 = read from NVS 0x483
* byte 4 = read from NVS 0x487
* byte 5 = read from NVS 0x486
* bytes 6-0xF = zeroed


- AC connected + No POWER Button pressed: 0x8
Example: FF FF 00 FF FF FF 00 00 00 00 00 00 00 00 00 00
<br \>ex: rebooting by software PSVita when AC is connected
<br \>ex: autobooting PSTV/IDU PSVita by pluging AC


- AC connected + POWER Button pressed: 0xC
== DIP Switches ==
<br \>ex: powering off by software PSTV then booting it by pressing POWER button
<br \>ex: booting PSVita by pressing POWER button when AC is connected


=== Bit flags point of view ===
DIP switches area embeds two parts: Communication Processor information as 32-bit integers, followed by DIP switches stored as bit flags.


{| class="wikitable"
{| class="wikitable"
! Bit !! Description
! Offset !! Size !! Description
|-
| 0x40 || 0x4 || CP Timestamp 1 (ex: 0x4AD86AB3 -> 16/10/2009 14:44:35)
|-
| 0x44 || 0x2 || CP Version (ex: 0x1301 -> 1301 on PDEL-100x)
|-
| 0x46 || 0x2 || CP Board ID (3 on DEM-300xH, 4 on PDEL-100x)
|-
| 0x48 || 0x4 || CP Timestamp 2 (identical as CP Timestamp 1)
|-
| 0x4C || 0x4 || ASLR Seed (?USER flags?) (also set on CEX and DEX) (ex: 0x00000000 on a DEM-300xH)
|-
| 0x50 || 0x4 || SDK (SCE) flags (ex: 0x80000000, 0x80000001, 0x80000003, 0x81000000, 0x81000001, 0, 2)
|-
| 0x54 || 0x4 || Shell flags (ex: 0x00000000 on a DEM-300xH)
|-
|-
| 0 || AC: connected: 1 - disconnected: 0 (note that PSTV always has AC connected)
| 0x58 || 0x4 || Debug control flags (ex: 0x000413E7 on a DEM-300xH, 0x001453E7 dev mode, 0x00080002 release mode)
|-
|-
| 1 || POWER button: pressed: 1 - not pressed: 0
| 0x5C || 0x4 || System control flags (ex: 0x2000001C on a DEM-300xH, 0x20000010 dev mode, 0x20000000 release mode)
|}
|}


== Wakeup factor ==
=== DIP Switches bit flags resolving ===
 
Warning: DIP Switches bit flags actually start at offset 0x10 (before that is CP information), which implies the first bit flag number is 128 (bit_num = offset / 8).
 
DIP Switches bit flags follow little-endian logic, which makes it hard to visualize in commonly used big-endian hexadecimal:
* ((uint32_t *)kbl_param->dipsw[0x10])[0] = 0x00000001 (big-endian in hex) = 01 00 00 00 (little-endian in hex) = 10000000 00000000 00000000 00000000 (little-endian in base 2) <- the 1 corresponds to bit flag number 128
* ((uint32_t *)kbl_param->dipsw[0x10])[0] = 0x00000002 (big-endian in hex) = 02 00 00 00 (little-endian in hex) = 01000000 00000000 00000000 00000000 (little-endian in base 2) <- the 1 corresponds to bit flag number 129
* ((uint32_t *)kbl_param->dipsw[0x10])[0] = 0x00000100 (big-endian in hex) = 00 01 00 00 (little-endian in hex) = 00000000 10000000 00000000 00000000 (little-endian in base 2) <- the 1 corresponds to bit flag number 136
* ((uint32_t *)kbl_param->dipsw[0x10])[0] = 0x80000000 (big-endian in hex) = 00 00 00 80 (little-endian in hex) = 00000000 00000000 00000000 00000001 (little-endian in base 2) <- the 1 corresponds to bit flag number 159
 
As you can see this way is not convenient to know in memory on which byte corresponds which bit flag, so instead we can use a formula to convert bit number to offset and bit: <code>offset = (bit_num / 32) * 4</code>, <code>bit = bit_num & 31</code>. This is used for example in the following code:
<source lang="C">
SceBool sceKernelCheckDipswForDriver(SceUInt32 no) {
  return (*(SceUInt32 *)(kbl_param->dipsw + (no >> 5) * 4) >> (no & 31)) & 1;
}
</source>
 
=== CP Information ===
 
Bits <code>0-31</code> is a 32-bit integer of the current time on the CP clock. This is duplicated in bits <code>64-95</code>.
 
Bits <code>32-47</code> is a 16-bit integer of the CP version and bits <code>48-63</code> is a 16-bit integer of the CP board ID. All integers are little-endian. On units that do not have a CP, these fields are zeroes.
 
Bits <code>96-127</code> is 32-bit integer ASLR seed that is randomized on each boot in second loader. It can be disabled by setting a specific DIP switch or QA flag byte 0xE mask 1.
 
Bits <code>0-63</code> are also manipulable as general purpose DIP Switches exposed with <code>sceKernelSetDipsw</code>, <code>sceKernelClearDipsw</code>, and <code>sceKernelCheckDipsw</code> but these functions do not change anything in hardware (only cached values are overwritten in [[SceSysmem]]).
 
According to SDK only DIP Switches 0-63 are accessible from usermode, however:
* On FW 0.990 (but not on FW 0.931 nor 3.60), DIP Switch number 237 is the only one out of range 0-63 that can be set from usermode.
* Usermode SELFs can use DIP Switches number > 63 if they have a special attribute or capability in SELF Auth Info.


*04 FF 00 00
=== SDK (SCE) flags ===
*04 00 00 00
*00 FF 00 00
*80 after suspend


== DIP Switches ==
Bits <code>128-159</code> are used for DevKit Boot Parameters.


{| class="wikitable"
{| class="wikitable"
! Offset !! Size !! Description
! Bit !! Name !! Description
|-
| 128 || memory_size_switch || Memory Size. Console Size: 1 - Development Tool Size: 0. (Extended game memory)
|-
| 129 || release_check_mode_console || Release Mode Console. On: 1 - Off: 0
|-
|-
| 0x40 || 0x4 || DevKit CP timestamp 1
| 152 || platform_emulation_dolce || PS TV Emulation. On: 1 - Off: 0
|-
|-
| 0x44 || 0x2 || DevKit CP Version
| 159 || development_mode || Release Check Mode. Development Mode: 1 - Release Mode: 0
|}
 
=== Shell flags ===
 
Bits <code>160-191</code> are used for [[SceShell]] flags.
 
dipsw 190 is ignored if dipsw 191 is on.
 
Turning on dipsw 191 and 213 at the same time can cause physical address conflicts.
 
{| class="wikitable"
! Bit !! Name !! Description
|-
|-
| 0x46 || 0x2 || DevKit CP Build ID
| 168 || || Memory Size.
|-
|-
| 0x48 || 0x4 || DevKit CP timestamp 2
| 184 || enable_extra_tty || Enable extra TTY: On: 1 - Off: 0. (tty7:)
|-
|-
| 0x4C || 0x4 || ASLR Seed
| 185 || || Enable System Boot Time Notifications: On: 1 - Off: 0
|-
|-
| 0x50 || 0x4 || DevKit Boot Parameters (ex: 0x80000000 or 0x80000001 or 0x80000003 or 0x81000000 or 0x81000001 OR 0x0 or 0x2 in release mode)
| 186 || || Related to SceShellCronCallback.
|-
|-
| 0x54 || 0x4 || unk
| 187 || || Allow processes to run on all cores (CPU affinity): On: 1 - Off: 0
|-
|-
| 0x58 || 0x4 || DevKit unk flags (ex: 0x0 retail, 0x1453E7 dev mode, 0x080002 release mode)
| 190 || || Disable to ScePhyMemPartShellDummy with PA 0x78000000 0x8000000-bytes.
|-
|-
| 0x5C || 0x4 || DevKit flags 3 (ex: 0x0 retail, 0x20000010 dev mode, 0x20000000 release mode)
| 191 || || Grow PhyMemPart with PA 0x78000000 0x8000000-bytes. Shell += 48MiB, Shared += 80MiB.
|}
|}


=== Bitflags resolving ===
=== Debug control flags ===
To convert the bit number to the offset and bit: <code>offset = 0x40 + (bit_num / 32) * 4</code>, <code>bit = 1 << (bit_num % 32)</code>.


=== CP Information ===
Bits <code>192-223</code> are for various debug options.
Bits <code>0-31</code> is a 32-bit integer of the current time on the DevKit CP clock. This is duplicated in bits <code>64-95</code>.


Bits <code>32-47</code> is a 16-bit integer of the CP version and bits <code>48-63</code> is a 16-bit integer of the CP build ID. All integers are little-endian.<br />On non-devkits, these fields are zero. Bits <code>0-63</code> are also usable as general purpose switches exposed with <code>sceKernelSetDipsw</code>, <code>sceKernelClearDipsw</code>, and <code>sceKernelCheckDipsw</code> but they do not change anything in hardware (only cached values are overwritten).
{| class="wikitable"
! Bit !! Description
|-
| 192 || Enable Dmac6.
|-
| 193 || Enable SDbgSdio, deci4p_sdfmgr, deci4p_sttyp
|-
| 194 || Enable User DECI. Enables Cpup, [[SceDbgSdio]], [[SceDbgUsb]] and dtrace module start. Force UnloadProcessModules on Process Delete.
|-
| 195 || Disable USB Debug. nouse_dbgusb (if enabled, [[SceDbgUsb]] does not init).
|-
| 196 || Enable kernel/NSKBL UART0 console logging (if enabled, UART0 is initialized and SceDebug handlers are set to UART0 functions). Or disable remote power control. In 0.920, enable UART3 output.
|-
| 197 || Enable kernel/NSKBL UART1 console logging: On: 1 - Off: 0
|-
| 198 || Enable System TTY: On: 1 - Off: 0. See [[SceDeci4pSTtyp]].
|-
| 199 || Enable TTY stdio ("tty0:"): On: 1 - Off: 0
|-
| 200 || Stop when an assertion fails: On: 1 - Off: 0
|-
| 201 || Set minimum assertion level to 1: On: 1 - Off: 0. Used in [[SceSysmem]].
|-
| 202 || Set minimum assertion level to 2: On: 1 - Off: 0. Used in [[SceSysmem]].
|-
| 203 || Disable Dipsw Re-Configuration: Disable: 1 - Enable: 0. Used in [[SKBL]]. Enabling this will force some Dipsw to be cleared or set by SKBL.
|-
| 204 || Set minimum log level to 1: On: 1 - Off: 0. Used in [[NSKBL]] and [[SceSysmem]].
|-
| 205 || Set minimum log level to 2: On: 1 - Off: 0. Used in [[NSKBL]] and [[SceSysmem]].
|-
| 206 || Allow syscall debug. Used in [[SceKernelThreadMgr]].
|-
| 210 || SCE_DIPSW_ENABLE_TOOL_PHYMEMPART. Allow Kernel Budget (Enable Devkit 512MiB DRAM): On: 1 - Off: 0
|-
| 211 || Enable usermode UART console logging: On: 1 - Off: 0. Enables [[SceTty2uart]]. Used in [[SceCoredump]].
|-
| 212 || Enable PA memory mapping for usermode. Used in NSKBL and [[SceSysmem]], [[ScePamgr]]. Works with dipsw 213.
|-
| 213 || PA memory mapping address. 1 to use PA 0x78000000 0x8000000-bytes. 0 to use PA 0x80000000 0x20000000-bytes. Used in NSKBL and [[SceSysmem]], [[ScePamgr]]. Works with dipsw 212.
|-
| 214 || Disable ASLR: Disabled: 1 - Enabled: 0.
|-
| 215 || Disable DECI4P System Debug process Trace: Disabled: 1 - Enabled: 0.
|-
| 216 || Wipe kernel stack by 0xFF: On: 1 - Off: 0.
|-
| 217 || Enable path logging: On: 1 - Off: 0. Used in [[SceIofilemgr]]. If set, [[SceKernelThreadMgr]] sets kernel thread stack size to 0x4000-bytes instead of 0x1000-bytes.
|-
| 218 || Ignore app keystone error in [[SceAppMgr]]: On: 1 - Off: 0.
|-
| 222 || Enable KBL Simple Memory Test over ScePowerScratchPad32KiB: On: 1 - Off: 0. See [[Physical Memory]], [[SKBL]].
|-
| 223 || Enable KBL Simple Memory Test over Secure DRAM: On: 1 - Off: 0. See [[Physical Memory]], [[SKBL]].
|}


==== User Flags ====
=== System control flags ===
Bits <code>96-127</code> does not seem to be used in the kernel.


==== DevKit Boot Parameters ====
Bits <code>224-255</code> are used for various system options.
Bits <code>128-159</code> are used to store DevKit flags. It does not appear to be used in other models.


{| class="wikitable"
{| class="wikitable"
! Bit !! Description
! Bit !! Description
|-
|-
| 152 || PS TV Emulation: On: 1 - Off: 0
| 224 || <code>SCE_DIPSW_PSP2_CONFIG_SD</code> Enable sdbgp's sysmemChecker. Allow plain psp2-config. Allows loading sd0:psp2-config.txt.
|-
| 225 || L2 Cache Disabled? (0 = L2 Cache ON, 1 = L2 Cache OFF). Used in [[SceSysmem]], NSKBL when doing something with exception stacks
|-
| 228 || Enables hardware break/watch point. Used in SKBL, [[SceProcessmgr]] and [[SceKernelThreadMgr]]. [[SKBL]] seems to enable/disable unknown devices. [[SceKernelThreadMgr]] copies some process info to SceKernelThreadObject related to breakpoints.
|-
| 229 || HDCP enable/disable. Used in [[SceAudio]].
|-
| 230 || Enable initialization of sd0 and ur0. Used in [[SceExfatfs]], ?[[SceIofilemgr]]?.
|-
| 231 || Enable initialization of os0. Used in [[SceExfatfs]], [[SceIofilemgr]].
|-
| 232 || ? Used in [[second_loader]]. DIP Switches 232, 240 and 241 are related.
|-
| 233 || Used in [[SceSdstor]] on System Software version 1.50.
|-
| 236 || GPU overclock. When enabled, GPU and GPU Xbar are overclocked from 111MHz to 166MHz.
|-
| 237 || Probably underclock/overclock related. On FW 0.990 (but not on FW 0.931 nor 3.60), this is the only DIP switch out of range 0-63 that can be set from usermode.
|-
| 238 || Underclock. When enabled, something is underclocked from 222MHz to 111MHz.
|-
| 239 || Underclock/overclock related.
|-
|-
| 159 || Release Check Mode: Development Mode: 1 - Release Mode: 0
| 240 || Disable QA flags. Used in [[second_loader]]. DIP Switches 232, 240 and 241 are related.
|-
|-
| ? || Memory Size: Console Size: 1 - Development Tool Size: 0
| 241 || Disable QA flags 0xD mask 1 and 0xE mask 1. Used in [[second_loader]]. DIP Switches 232, 240 and 241 are related.
|-
| 250 || Enable "tty0:"
|-
| 251 || Enable "dummytty0:". Also allow sysmodule load from <code>host0:</code> (SceSysmodule debug).
|-
| 252 || Allow host0: access. Used in [[SceSysStateMgr]], [[SceSblFwLoader]].
|-
| 253 || Enable some console logging: On: 1 - Off: 0. Used in [[NSKBL]]. Related to remote power control in (old?) <code>deci4p_dfctl.skprx</code>
|}
|}


==== Shell Flags ====
== Boot type indicator 1 ==
Bits <code>160-191</code> are used for [[SceShell]] flags.
 
We ignore the official name so we name it Boot type indicator 1.
 
* 0x1: external boot mode. It is used in manufacture image to boot in external mode. It cannot be set in release second_loader.
* 0x2: SKBL has been loaded from GCSD
* 0x4: product mode. manufacturing mode (Mgmt bit 0)
* 0x8: seems to be never set in release second_loader. Required by FW 0.931 SKBL to perform memory tests.
* 0x40: use special Media Type. Never set in release second_loader. Used in NSKBL when loading modules from sd0:.
* 0x10000: jig handshake5 status, bypasses current system software version checks
* 0x20000: resume mode. Disables boot logo display.
* 0x40000: manufacturing mode (Mgmt bit 0) and GCSD initialized (for mounting sd0:) by second_loader using Syscon command 0x888.
* 0x80000: sd mode (Mgmt bit 1). [[SceExfatfs]] checks this flag before mounting sd0:.
 
== Sleep Factor ==
 
This is a guessed name. A possible name is "Wakeup Req" from PSP function name sceSysconGetWakeUpReq.
 
Used in [[SceSysmem#sceKernelSysrootIsUsbEnumWakeupForKernel]].
 
* 1 bsod reboot (or other serious factors)
* 4 seen on a DEM-3000G running System Software 0.930.010
* 0x10 bsod poweroff
* 0x60 seen on a PCH-11xx
* 0x400 seen on a PCH-1xxx in Manufacturing mode
* 0x20000 unknown
 
== Wakeup Factor ==
 
Wakeup Factor is only 2 bytes but to preserve alignment, in KBL Param it is extended to 4 bytes.


{| class="wikitable"
*00 00 00 00 coldboot on a DEM-3000H
! Bit !! Description
*01 XX XX XX unknown
|}
*04 00 00 00 reboot
*0E XX XX XX related to USB Enum Wakeup(maybe devkit)
*0F 00 00 00 USB Enum Wakeup
*14 00 00 00 boot with power hold
*00 FF 00 00 maybe coldboot
*04 FF 00 00 reboot
*14 FF 00 00 boot with power hold
*16 FF 00 00 boot by charge cable
*17 XX 00 00 BSOD reboot
*80 00 00 00 after suspend


==== Debug Flags ====
Deduction:
Bits <code>192-223</code> are for various debugging options.
* 1: Maybe do not show lock screen
* 2: USB enum wakeup
* 4: reboot
* 0x8: BSOD
* 0xB: goes to safe mode
* 0x10: anormal boot
* 0x1F: goes to safe mode
* 0x20: unknown


{| class="wikitable"
{| class="wikitable"
! Bit !! Description
|+ Wakeup factor bits description
|-
! Bitmask !! Usage !! Notes
|-
| 0xFF00 || Unknown || ?battery related?
|-
|-
| 197 || Enable kernel console logging
| 0x0080 || Resume flag || Set when unit is resuming
|-
|-
| 211 || Enable user UART console logging
| 0x007F || Wakeup reason || Indicates why the unit has been powered on. May be a bitflag or an enumeration.
|}
|}


==== System Flags ====
== Boot Controls Info ==
Bits <code>224-255</code> are used for various system options.
 
This information can be parsed the same way as in [[SceSyscon#Types|SceSysconControl]].
 
Keys combo:
* Enter Safe mode: Power + PS + R
* Rebuild Database: Power + PS + R + (Square or Cross)
* Set Production Mode On for Prototype: Power + PS + Square + Cross + Up + Left
* Set Production Mode On: Power + PS + R + Square + Cross (not present on FW 0.931, present on FWs 0.940+)
 
Note:
* Set Production Mode On combos are not needed on genuine PS TV in Wakeup Factor flag 0x20 and are only checked when Wakeup Factor flags 0xB or 0x20 are set.
* Set Production Mode On requires Jig connected else it fails with error 0x800F0A05 on set_pm STEP 8657.
 
== Hardware Info ==
 
Hardware Info is got from [[Ernie#CMD_0x0005_-_GetHardwareInfo|Ernie]].
 
It can be obtained using [[SceSyscon#sceSysconGetHardwareInfoForDriver]]. It can also be seen in the packet header in [[Syscon Update]].
 
The following list is ordered by [[Ernie]] firmware version, which should approximately match the hardware revision order.
 
* 0x00101003: supports FW 0.931.010
* 0x00102003: supports FW 0.931.010
* 0x00314000: supports FW 0.931.010
* 0x00102403: supports FW 0.931.010-1.692.000
* 0x00315000: certainly DEM-3000G (IRT-001), supports FW 0.931.010-1.692.000
* 0x00102603: supports FW 0.940.000-3.680.011
* 0x00315200: certainly DEM-3000H (IRT-001), supports FW 0.940.000-1.692.000
* 0x00411000: supports FW 0.990.030-1.692.000, Product Sub Code 7, 9 or 0xA probably
* 0x00414000: DEM-3000K (IRT-002), supports FW 0.990.030-1.692.000, Product Sub Code 9
* 0x00415000: DEM-3000L (IRT-002), supports FW 0.995.070-1.692.000, Product Sub Code 0xB
* 0x00415200: certainly DEM-3000P (IRT-002), supports FW 0.996.070-3.680.011, Product Sub Code 0xC probably
* 0x00416000: PDEL-10XX, DEM-3000JEC third revision (IRT-002), supports FW 1.000-3.730, Product Sub Code 0xF, 0x10
* 0x00404000: unknown DEX model, CEM-3000, supports FW 0.990-1.692.000
* 0x00404100: unknown DEX model, CEM-3000, supports FW 0.990-1.692.000
* 0x00404400: unknown DEX model, CEM-3000, supports FW 0.990-1.692.000
* 0x00404600: DEX model, CEM-3000NE2, supports FW 0.990-1.692.000
* 0x00404800: unknown DEX model, supports FW 1.660-1.692.000
* 0x00405000: unknown DEX model, supports FW 1.660-3.720
* 0x00405200: unknown DEX model, supports FW 1.660-3.720
* 0x00406000: PCH-10XX / PTEL-10XX (Product Sub Code 0x10) (IRS-002 without 3G PCIe); ?CEM-3000VP1? / CEM-3000NP1 / TEFV-1000PV1 (Product Sub Code 0xF) -> supports FW 1.000-3.740
* 0x00406002: PCH-11XX (IRS-002 with 3G PCIe), supports FW 1.040-3.740
* 0x0051XXXX: Prototype PS TV.
* 0x00601000: unknown TOOL/DEX/CEX model (IRS-1001), supports FW 1.800-3.740
* 0x00602000: unknown DEX/CEX model (IRS-1001), supports FW 1.800-3.740
* 0x00603000: unknown DEX/CEX model (IRS-1001), supports FW 1.800-3.740
* 0x00603200: PCH-10XX / PCH-11XX (IRS-1001), supports FW 1.800-3.740
* 0x00703000: CEM-3000P01 (DOL-1001), supports FW 2.500-3.740
* 0x00703030: VTE-10XX (DOL-1001), supports FW 2.500-3.740
* 0x00805038: PCH-20XX / PTEL-20XX (USS-1001), supports FW 2.500-3.740
* 0x00723030: VTE-10XX (DOL-1002), supports FW 3.300-3.740
* 0x00822238: PCH-20XX (USS-1002), supports FW 3.500-3.740
* 0x0090XXXX: Unknown prototype.
 
=== Bytes meaning ===
 
As PS Vita uses little-endian, we describe here in the same order, from the lowest to the highest.
 
==== First byte ====
 
This byte indicates the presence of some components. It works by bit flags:
* 0x01: ?has SD card reader? (some DevKits and prototypes)
* 0x02: has WWAN (3G modem). This is what SceBbmc checks to know if 3G modem is supported.
* 0x04: unknown
* 0x08: ?has microUSB? (Slim only)
* 0x10: is MC emu capable (Slim and PS TV only). MC Emulation is done by partitionning the internal memory [[EMMC]].
* 0x20: has hw_info_2 (Slim and PS TV only)
* 0x40: is Show mode
* 0x80: is IDU mode
 
==== Second byte ====
 
This byte indicates the motherboard minor version. It is relative to the motherboard main version which is indicated by third byte.
 
==== Third byte ====
 
This byte indicates the motherboard main version:
* 10 -> unknown prototype motherboard, has Syscon, maybe IRS-001
* 31 -> IRT-001
* 40 -> IRS-002
* 41 -> IRT-002
* 51 -> PS TV prototype motherboard
* 60 -> IRS-1001
* 70 -> DOL-1001
* 72 -> DOL-1002
* 80 -> USS-1001
* 82 -> USS-1002
* 90 -> unknown prototype motherboard
 
We can also guess that flag 1 means that the console has a Communication Processor.
 
==== Fourth byte ====
 
This byte is reserved in case 3 bytes becomes not enough to handle all Hardware Info:
* 00 -> default, unused
 
== Power Info ==
 
=== Experimental point of view ===
 
- No AC connected + No POWER Button pressed: 0x0
<br \>ex: rebooting by software PS Vita when AC is not connected
 
- No AC connected + POWER Button pressed: 0x4
<br \>ex: booting PS Vita by pressing POWER button when AC is not connected
 
- AC connected + No POWER Button pressed: 0x8
<br \>ex: rebooting by software PS Vita when AC is connected
<br \>ex: autobooting PS TV/IDU PS Vita by pluging AC
 
- AC connected + POWER Button pressed: 0xC
<br \>ex: powering off by software PS TV then booting it by pressing POWER button
<br \>ex: booting PS Vita by pressing POWER button when AC is connected
 
=== Bit flags point of view ===


{| class="wikitable"
{| class="wikitable"
! Bit !! Description
! Bit !! Description
|-
|-
| 229
| 0 || unknown. Not seen.
| HDCP related?
|-
| 1 || unknown. Not seen.
|-
| 2 || POWER button: pressed: 1 - not pressed: 0
|-
| 3 || AC: connected: 1 - disconnected: 0 (note that PS TV always has AC connected)
|}
|}


== Hardware flags ==
== Hardware Info 2 ==
 
Hardware Info 2 is supported since System Software version 2.10. It is an extension to [[#Hardware Info|Hardware Info]]
 
Hardware Info 2 is got from Syscon command 6.
 
It can be obtained using [[SceSyscon#sceSysconGetHardwareInfo2ForDriver]].


{| class="wikitable"
{| class="wikitable"
! Bit !! Description
! Bit !! Description
|-
|-
| 1 || IC Connexant: 1 - yes, 2 - no
| 1 (0x2) || unknown
|-
| 4 (0x8) || Related to display
|-
|-
| 5 || unk
| 5 (0x20) || unknown
|-
|-
| 6 || unk
| 6 (0x40) || Conexant Codec IC (1 = present, 0 = not present)
|-
|-
| 7 || unk
| 7 (0x80) || unknown
|-
|-
| 14 || unk
| 14 (0x4000) || unknown
|}
|}


*all zeroes on most cases
Seen values:
*47 02 on a Slim
* 0 on a Fat PS Vita with IRS-002
* 7 on a Slim PS Vita with USS-1001
* 0x247 on a Slim PS Vita with USS-1002


== Types ==
== Types ==


<source lang="C">
<source lang="C">
typedef struct SceBootArgs {
typedef struct SceDIPSW {
  uint32_t cp_timestamp_1;
  uint16_t cp_version;
  uint16_t cp_build_id;
  uint32_t cp_timestamp_2;
  uint32_t aslr_seed;
  uint32_t sce_sdk_flags;
  uint32_t shell_flags;
  uint32_t debug_control_flags;
  uint32_t system_control_flags;
} SceDIPSW;
 
typedef struct SceKblParam {
   uint16_t version;
   uint16_t version;
   uint16_t size;
   uint16_t size;
   uint32_t fw_version;
   uint32_t current_fw_version;
   uint32_t ship_version;
   uint32_t min_fw_version;
   uint8_t unk_C[0x14];
   uint32_t unk_C;
  uint8_t bitfield_flags[0x20];
   uint32_t unk_10;
   uint32_t devkit_cp_timestamp_1;
   uint8_t unk_14[0xC];
   uint16_t devkit_cp_version;
   uint8_t qa_flags[0x10];
   uint16_t devkit_cp_build_id;
   uint8_t boot_flags[0x10];
   uint32_t devkit_cp_timestamp_2;
   SceDIPSW dipsw;
  uint32_t aslr_seed;
   SceKernelPARange dram;
   uint32_t devkit_boot_parameters;
   uint32_t unk_54;
  uint32_t devkit_unk_flags;
  uint32_t devkit_flags_3;
  uint32_t dram_base;
  uint32_t dram_size;
   uint32_t unk_68;
   uint32_t unk_68;
   uint32_t boot_type_indicator_1;
   uint32_t boot_type_indicator_1;
   uint8_t openpsid[0x10];
   SceOpenPsId openpsid;
   uint32_t secure_kernel_enp_addr;
   SceKernelPARange secure_kernel_enp;
   uint32_t secure_kernel_enp_size;
   SceKernelPARange context_auth_sm_self;
   uint8_t unk_88[0x8];
   SceKernelPARange kprx_auth_sm_self;
   uint32_t kprx_auth_sm_self_addr;
   SceKernelPARange prog_rvk_srvk;
   uint32_t kprx_auth_sm_self_size;
   ScePsCode pscode;
   uint32_t prog_rvk_srvk_addr;
   uint32_t __stack_chk_guard;
  uint32_t prog_rvk_srvk_size;
   uint8_t unk_AC[4];
  uint8_t pscode[0x8];
   uint8_t unk_A8[0x8];
   uint8_t session_id[0x10];
   uint8_t session_id[0x10];
   uint32_t unk_C0;
   uint32_t sleep_factor;
   uint32_t wakeup_factor;
   uint32_t wakeup_factor;
   uint32_t unk_C8;
   uint32_t unk_C8;
   uint32_t unk_CC;
   uint32_t boot_controls_info;
   uint32_t resume_context_addr;
   uint32_t resume_context_paddr;
   uint32_t hardware_info;
   uint32_t hardware_info;
   uint32_t boot_type_indicator_2;
   uint32_t power_info;
   uint8_t unk_DC[0xC];
   uint8_t unk_DC[0xC];
   uint8_t hardware_flags[0x10];
   uint8_t hardware_info_2[0x10];
   uint32_t bootldr_revision;
   uint32_t bootldr_revision;
   uint32_t magic;
   uint32_t magic;
   uint8_t session_key[0x20];
   uint8_t coredump_session_key[0x20];
   uint8_t unused[0xE0];
   uint8_t unused[0xE0];
} __attribute__((packed)) SceBootArgs;
} __attribute__((packed)) SceKblParam;
</source>
</source>


 
[[Category:Cmep]]
[[Category:ARM]]
[[Category:Startup]]
[[Category:Startup]]
[[Category:Kernel]]
[[Category:Kernel]]
[[Category:Formats]]

Latest revision as of 12:57, 2 October 2024

The KBL Param buffer (temporary name was sysroot buffer) is a 0x100 or 0x200 bytes sized buffer passed to the Secure Kernel BootLoader in the scratch space and contains all sorts of flags and system parameters. This buffer is created in Second Loader copied to Secure Kernel, passed to the Secure and Non-Secure Kernel BootLoaders, and finally to the non-secure kernel. It is used in many functions to check for features that are enabled for the system. The strategy in this buffer is to compute once for all the information that is often used, to share it between all security layers not to have to implement generator code many times, and to implement the generation code in the most secure layer: second_loader (excluding first_loader but that's because first_loader is not updatable and has minimum code).

Structure

Offset Size Set by Description
0x0 0x2 second_loader Version (usually 1)
0x2 0x2 second_loader Size. Size of this structure. 0x100 or 0x200.
0x4 0x4 second_loader Current Firmware Version
0x8 0x4 second_loader Minimum Firmware Version. Comes from SMI IdStorage leaf.
0xC 0x4 Unknown Unknown
0x10 0x4 Unknown Used for Kit Activation. If lower than 0x20, the Kit is fake activated (License Status = 0, Issue No = 0, Expire Date = 0xffffffff). If lower than 0x30, default bus error handler is not registered in SceKernelBusError.
0x14 0xC Unknown maybe unused
0x20 0x10 second_loader QA flags
0x30 0x10 second_loader Boot flags
0x40 0x20 second_loader DIP Switches
0x60 0x4 second_loader DRAM base paddr (0x40000000)
0x64 0x4 second_loader DRAM size (0x20000000 on retail and testkit, 0x40000000 on DevKit in DevKit Memory Size mode)
0x68 0x4 Unknown unk
0x6C 0x4 second_loader Boot type indicator 1
0x70 0x10 second_loader OpenPsId. Comes from IdStorage.
0x80 0x4 second_loader secure_kernel.enp raw data paddr (optional)
0x84 0x4 second_loader secure_kernel.enp size (optional)
0x88 0x4 second_loader context_auth_sm.self raw data paddr
0x8C 0x4 second_loader context_auth_sm.self size
0x90 0x4 second_loader kprx_auth_sm.self raw data paddr
0x94 0x4 second_loader kprx_auth_sm.self size
0x98 0x4 second_loader prog_rvk.srvk raw data paddr
0x9C 0x4 second_loader prog_rvk.srvk size
0xA0 0x8 second_loader PsCode. Comes from IdStorage.
0xA8 0x4 second_loader __stack_chk_guard. Set by Second Loader to a pseudo random number. Exported by SceSysmem as __stack_chk_guard.
0xAC 0x4 second_loader Unknown. Set by Second Loader to a pseudo random number.
0xB0 0x10 second_loader Session ID
0xC0 0x4 second_loader Sleep Factor. Comes from Syscon command 3.
0xC4 0x4 second_loader Wakeup Factor. Comes from Syscon command 0x10.
0xC8 0x4 second_loader Unknown, contains USB info. Comes from Syscon command 0x800 (?device model dependant?). (ex: 0x40 PS Vita usually, 0x60 PS TV usually, 0x64 DEM-3000H, 0x1C0 PC USB -> charge USB on FAT, 0x2D2 PC USB -> USB -> charge USB on FAT, 0x2D3 charge USB on FAT, 0x3D2, 0xC001C0 USB charge on SLIM, 0xC503D2 USB charge on SLIM, 0xC501CA USB data to PC)
0xCC 0x4 second_loader Boot Controls Info. Comes from Syscon command 0x100.
0xD0 0x4 second_loader suspendinfo_adr. Resume context physical address. Comes from Syscon command 0x90, Scratch Pad offset 0xC.
0xD4 0x4 second_loader Hardware Info. Comes from Syscon command 5.
0xD8 0x4 second_loader Power Info
0xDC 0x4 Unknown unk
0xE0 0x4 second_loader, SceDriverTzs If resume, always 0 (second_loader).
0xE4 0x4 Unknown unk
0xE8 0x10 second_loader Hardware Info 2. Comes from Syscon command 6.
0xF8 0x4 second_loader BootLoader Revision
0xFC 0x4 Unknown KBL Param Magic value (0xCBAC03AA)
0x100 0x20 second_loader Coredump Encrypted Session Key (FW 2.12+)

QA flags

The steps to install QA flags on a PS Vita are: 

Write Qaf token to NVS at offset 0x400 (0x80-bytes) (tied to Console ID).
Write Qaf token RSA signature to NVS at offset 0x5A0 (0x100-bytes) (only required on firmware 1.80 and above).
Write Qaf version to SNVS sector 0x15.
Clear Qaf inhibit DIP switches 240 and 241 (maybe even more DIP switches inhibit QA flags).
Write Qaf enable flag to NVS at offset 0x480.
Set Qaf ON flag to SNVS mgmt sector.

The following libraries are available for checking QA Flags

SceSblQafMgr

SceSblQafMgrForDriver

SceVshBridge

In the following table bytes are counted from left to right and bits from left to right too (little-endian). However the OS uses bit masking for QA flags (unlike bit shifting for DIP Switches).

Byte (0-0xF) - mask = 1 << (bit_no & 7) Used in Description
Byte 0x0 > Mask 1 update_service_sm Skip System Update version check on CEX (but still there Manufacturing mode checks).
spkg_verifier_sm_w_key_2
Byte 0x0 > Mask 2 Unknown -
Byte 0x0 > Mask 0x10 SceNpDrm Allow Finalized Retail Package on Non CEX unit without StoreFlag.
Byte 0x0 > Mask 0x20 Unknown -
Byte 0x6 > Mask 1 Unknown -
Byte 0x6 > Mask 2 To check Allow Dtcp Ip Reset, Allow NearTest/PSPEmuShowQAInfo (SceVshBridge)
SceShell Allow Fake AC Install, Allow Show Title Upgrade Info, Allow Liblocation Change Model on CEX, Allow ScreenShot Always.
SceRtc Allow something on sceRtcGetCurrentAdNetworkTickForDriver
SceStoreBrowser Allow Limited Debug Menu Display
SceSettings
SceNpCommon Allow Np Full Test
SceIduUpdate Allow Control Idu Auto Update
Byte 0x6 > Mask 4 Unknown -
Byte 0x6 > Mask 8 Unknown -
Byte 0x7 > Mask 1 Unknown -
Byte 0x7 > Mask 4 Unknown -
Byte 0x8 > Mask 1 Unknown -
Byte 0x8 > Mask 2 Unknown -
Byte 0x8 > Mask 4 Unknown -
Byte 0x8 > Mask 0x10 Unknown -
Byte 0x8 > Mask 0x20 Unknown -
Byte 0x8 > Mask 0x40 Unknown -
Byte 0x9 > Mask 1 Used on FW 0.931 by SceSblACMgrForKernel_F7524073 -
Byte 0xB > Mask 1 Unknown Unknown. Maybe to use alternate keyset (internal).
Byte 0xB > Mask 4 kprx_auth_sm Use alternate keyset e.g. QA SPSFO key/NpDrm app key.
SceAppMgr Allow ignore app keystone error.
SceSblACMgr Allow User App Debug.
Byte 0xB > Mask 0x10 secure_kernel Bypass platform (Test/Tool/Diag) requirement for loading of fSELF with attribute 128
SceSettings Allow EMPR via vshSblQafMgrIsAllowLoadMagicGate
SceDbRecovery -
Byte 0xC > Mask 2 SceSettings Allow All Debug Menu Display, Allow RemotePlayDebug
SceGps Allow sceSblACMgrIsSystem bypass
Byte 0xC > Mask 4 Updater Skip version checks in system updates
compat_sm Allow compat_sm operation on DevKit (can be use PspEmu)
Byte 0xD > Mask 1 : Allow Kernel Debug To check USB Enum Wake Up Debug Menu.
secure_kernel CMeP Debug.
NSKBL logging level set to 0 instead of 1/2, 1 instead of 2
SceSysmem Allow printing Syscall Frame info with module name + offset.
Allow Kernel Debug Level.
SceDeci4pSDrfp Allow starting this module.
SceDeci4pSCTtyp Allow starting this module.
SceDeci4pSDbgp Allow starting this module. Allow call to SceDeci4pSdbgpTest export function.
SceDeci4pSDfMgr Allow dumping the non encrypted .psp2kerndmp
SceDeci4pLoadp Allow load/unload/start/stop Kernel module.
SceDeci4pDtracep Allow disabled NID encode. Allow dtrace sysbreak. Allow all process dtrace. And more.
SceExcpmgr Allow printing module info with module name.
SceKernelModulemgr Allow dump the module load address (printing)
ScePamgr Allow more SyscallTrace flag.
SceHdmi Allow HDCP control by dipsw. Allow HDMI CEC on PS TV Emu.
SceAudio Allow something audio debug control by dipsw.
SceWlanBt Allow enable WlanBt on DEM-3000 (IRT-001) for Non IsTest unit and Non Product Mode
Byte 0xD > Mask 2 : Allow System Debug secure_kernel Allow to bypass absent Media Type 7 (host0:) in SELF attribute for usermode SELF.
SceAppMgr Dictates if you can pass arguments to sceAppMgrLaunchAppByPathForDriver
SceSysmodule Allow Remote Sysmodule Load (host0:)
SceParty
SceCommonDialogMain
SceShell
SceSysStateMgr Allow loading host0:psp2config.rpath.
SceDeci4pLoadp Allow any drive path.
SceKernelModulemgr Allow preloading module path switching by dipsw.
SceSysLibTrace Allow System NID symbol table refer.
SceSblACMgr Allow System App Debug
SceDeci4pDtracep Allow System App dtrace.
SceVshBridge (stub) Allow Marlin Test (SceVshBridge)
Byte 0xE > Mask 1 : Allow Module Debug second_loader Allow ignore SceKblPara->dipsw.ASLR initialize.
secure_kernel Allow to bypass absent Media Type 7 (host0:) in SELF attribute for Kernel/SM SELF.
NSKBL Allow Force Loading Boot Kernel Module in 100000 times on loadModule function.
SceSysStateMgr Allow loading host0:psp2config.skprx, Allow loading psp2config as plaintext. Allow loading host0:psp2config.rpath.
SceDeci4pLoadp Allow any drive path.
SceSblPostSsMgr Allow Remote SM Loading (host0:), Allow Remote Spfso Auth (host0:), Allow Remote FwLoader path switching by dipsw (host0:module/).
SceKernelModulemgr Allow Remote Kernel module Loading (host0:).
Byte 0xE - mask 2 Unknown Unknown
Byte 0xF > Mask 1 secure_kernel Allow SELF attribute qaf::0xF::1 required
kprx_auth_sm Enable DMAC5 keyset for 0x10001
update_service_sm Allow QAUpdate
spkg_verifier_sm_w_key_2
SceSblUpdateMgr
SceSettings Minimum Debug Menu Display
SceCuiSetUpper Allow Non QAPup on CEX.
SceSafeMode
SceSettings
SceShell
SceNpDrm Allow Debug DRM Loose Bind.
SceNpCommon Allow Np Test
SceShell
SceRegistryMgr Allow more registry keys.
SceShell Allow Keep CoreFile
Byte 0xF > Mask 2 : Allow Force Update update_service_sm Skip the System Update's version checks and Manufacturing mode checks on CEX
spkg_verifier_sm_w_key_2
SceSblUpdateMgr
Any QA flag act_sm Infinite Kit activation

To check: Byte 0xF - mask 1, Byte 0xE - mask 1, Byte 0xE - mask 2, Byte 0xB - mask 0x10: Revocation related.

Existing QA flag token templates identified thus far:

  • NO_FLAGS: Default value with no QA flag set. Generated upon request on unit by qaf_sm using QAF keyslots set by second_loader, no signature.
  • QAF_QATEAM_MINI_E: QA flags (mini) for QA Team units running External System Software. Set on DevKits.
  • QAF_QATEAM_FULL_E: QA flags (full) for QA Team units running External System Software. Set on Retail and TestKits. Same as QAF_QATEAM_MINI_E but with two more QA flags (Byte 0x0 - mask 0x10 and Byte 0x6 - mask 2) set. These supplementary QA flags allow features like: ScreenShot Always, Np Full Test, Limited Debug Menu Display.
  • QAF_SYS_DEV_I: QA flags (development) for System Software QA units running Internal System Software. Set on Development tools used for system debugging, running Internal firmware. Set on DevKits.
  • QAF_MGVIDEO_DEV_I: QA flags (development) for Magic Gate Video QA units running Internal System Software. Set on DevKits.

Basically the same as QAF_SYS_DEV_I, but with the addition of the AllowMagicGate flag. But the AllowKernelDebug flag is cleared.

  • QAF_MGVIDEO_ADV_I: QA flags (advanced) for Magic Gate Video QA units running Internal System Software. Set on DevKits.

Basically the same as QAF_SYS_DEV_I, but with the addition of the AllowMagicGate flag. 

flags for NO_FLAGS:
  00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
flags for QAF_QATEAM_MINI_E: 
  01 00 00 00 00 00 0D 04 64 00 00 00 04 00 00 03
flags for QAF_QATEAM_FULL_E: 
  11 00 00 00 00 00 0F 04 64 00 00 00 04 00 00 03
flags for QAF_SYS_DEV_I:
  33 00 00 00 00 00 07 05 73 01 00 01 06 03 03 01
flags for QAF_MGVIDEO_DEV_I:
  33 00 00 00 00 00 07 05 73 01 00 11 06 02 03 01
flags for QAF_MGVIDEO_ADV_I:
  33 00 00 00 00 00 07 05 73 01 00 11 06 03 03 01

Boot flags

These Boot flags come from Ernie NVS.

On FW 3.60, second_loader generates the boot flags as following:

  • byte 0 = read from NVS 0x4A0
  • byte 1 = read from NVS 0x481
  • byte 2 = zeroed
  • byte 3 = read from NVS 0x483
  • byte 4 = read from NVS 0x487
  • byte 5 = read from NVS 0x486
  • bytes 6-0xF = zeroed

Example: FF FF 00 FF FF FF 00 00 00 00 00 00 00 00 00 00

DIP Switches

DIP switches area embeds two parts: Communication Processor information as 32-bit integers, followed by DIP switches stored as bit flags.

Offset Size Description
0x40 0x4 CP Timestamp 1 (ex: 0x4AD86AB3 -> 16/10/2009 14:44:35)
0x44 0x2 CP Version (ex: 0x1301 -> 1301 on PDEL-100x)
0x46 0x2 CP Board ID (3 on DEM-300xH, 4 on PDEL-100x)
0x48 0x4 CP Timestamp 2 (identical as CP Timestamp 1)
0x4C 0x4 ASLR Seed (?USER flags?) (also set on CEX and DEX) (ex: 0x00000000 on a DEM-300xH)
0x50 0x4 SDK (SCE) flags (ex: 0x80000000, 0x80000001, 0x80000003, 0x81000000, 0x81000001, 0, 2)
0x54 0x4 Shell flags (ex: 0x00000000 on a DEM-300xH)
0x58 0x4 Debug control flags (ex: 0x000413E7 on a DEM-300xH, 0x001453E7 dev mode, 0x00080002 release mode)
0x5C 0x4 System control flags (ex: 0x2000001C on a DEM-300xH, 0x20000010 dev mode, 0x20000000 release mode)

DIP Switches bit flags resolving

Warning: DIP Switches bit flags actually start at offset 0x10 (before that is CP information), which implies the first bit flag number is 128 (bit_num = offset / 8).

DIP Switches bit flags follow little-endian logic, which makes it hard to visualize in commonly used big-endian hexadecimal:

  • ((uint32_t *)kbl_param->dipsw[0x10])[0] = 0x00000001 (big-endian in hex) = 01 00 00 00 (little-endian in hex) = 10000000 00000000 00000000 00000000 (little-endian in base 2) <- the 1 corresponds to bit flag number 128
  • ((uint32_t *)kbl_param->dipsw[0x10])[0] = 0x00000002 (big-endian in hex) = 02 00 00 00 (little-endian in hex) = 01000000 00000000 00000000 00000000 (little-endian in base 2) <- the 1 corresponds to bit flag number 129
  • ((uint32_t *)kbl_param->dipsw[0x10])[0] = 0x00000100 (big-endian in hex) = 00 01 00 00 (little-endian in hex) = 00000000 10000000 00000000 00000000 (little-endian in base 2) <- the 1 corresponds to bit flag number 136
  • ((uint32_t *)kbl_param->dipsw[0x10])[0] = 0x80000000 (big-endian in hex) = 00 00 00 80 (little-endian in hex) = 00000000 00000000 00000000 00000001 (little-endian in base 2) <- the 1 corresponds to bit flag number 159

As you can see this way is not convenient to know in memory on which byte corresponds which bit flag, so instead we can use a formula to convert bit number to offset and bit: offset = (bit_num / 32) * 4, bit = bit_num & 31. This is used for example in the following code: 

SceBool sceKernelCheckDipswForDriver(SceUInt32 no) {
  return (*(SceUInt32 *)(kbl_param->dipsw + (no >> 5) * 4) >> (no & 31)) & 1;
}

CP Information

Bits 0-31 is a 32-bit integer of the current time on the CP clock. This is duplicated in bits 64-95.

Bits 32-47 is a 16-bit integer of the CP version and bits 48-63 is a 16-bit integer of the CP board ID. All integers are little-endian. On units that do not have a CP, these fields are zeroes.

Bits 96-127 is 32-bit integer ASLR seed that is randomized on each boot in second loader. It can be disabled by setting a specific DIP switch or QA flag byte 0xE mask 1.

Bits 0-63 are also manipulable as general purpose DIP Switches exposed with sceKernelSetDipsw, sceKernelClearDipsw, and sceKernelCheckDipsw but these functions do not change anything in hardware (only cached values are overwritten in SceSysmem).

According to SDK only DIP Switches 0-63 are accessible from usermode, however:

  • On FW 0.990 (but not on FW 0.931 nor 3.60), DIP Switch number 237 is the only one out of range 0-63 that can be set from usermode.
  • Usermode SELFs can use DIP Switches number > 63 if they have a special attribute or capability in SELF Auth Info.

SDK (SCE) flags

Bits 128-159 are used for DevKit Boot Parameters.

Bit Name Description
128 memory_size_switch Memory Size. Console Size: 1 - Development Tool Size: 0. (Extended game memory)
129 release_check_mode_console Release Mode Console. On: 1 - Off: 0
152 platform_emulation_dolce PS TV Emulation. On: 1 - Off: 0
159 development_mode Release Check Mode. Development Mode: 1 - Release Mode: 0

Shell flags

Bits 160-191 are used for SceShell flags.

dipsw 190 is ignored if dipsw 191 is on.

Turning on dipsw 191 and 213 at the same time can cause physical address conflicts.

Bit Name Description
168 Memory Size.
184 enable_extra_tty Enable extra TTY: On: 1 - Off: 0. (tty7:)
185 Enable System Boot Time Notifications: On: 1 - Off: 0
186 Related to SceShellCronCallback.
187 Allow processes to run on all cores (CPU affinity): On: 1 - Off: 0
190 Disable to ScePhyMemPartShellDummy with PA 0x78000000 0x8000000-bytes.
191 Grow PhyMemPart with PA 0x78000000 0x8000000-bytes. Shell += 48MiB, Shared += 80MiB.

Debug control flags

Bits 192-223 are for various debug options.

Bit Description
192 Enable Dmac6.
193 Enable SDbgSdio, deci4p_sdfmgr, deci4p_sttyp
194 Enable User DECI. Enables Cpup, SceDbgSdio, SceDbgUsb and dtrace module start. Force UnloadProcessModules on Process Delete.
195 Disable USB Debug. nouse_dbgusb (if enabled, SceDbgUsb does not init).
196 Enable kernel/NSKBL UART0 console logging (if enabled, UART0 is initialized and SceDebug handlers are set to UART0 functions). Or disable remote power control. In 0.920, enable UART3 output.
197 Enable kernel/NSKBL UART1 console logging: On: 1 - Off: 0
198 Enable System TTY: On: 1 - Off: 0. See SceDeci4pSTtyp.
199 Enable TTY stdio ("tty0:"): On: 1 - Off: 0
200 Stop when an assertion fails: On: 1 - Off: 0
201 Set minimum assertion level to 1: On: 1 - Off: 0. Used in SceSysmem.
202 Set minimum assertion level to 2: On: 1 - Off: 0. Used in SceSysmem.
203 Disable Dipsw Re-Configuration: Disable: 1 - Enable: 0. Used in SKBL. Enabling this will force some Dipsw to be cleared or set by SKBL.
204 Set minimum log level to 1: On: 1 - Off: 0. Used in NSKBL and SceSysmem.
205 Set minimum log level to 2: On: 1 - Off: 0. Used in NSKBL and SceSysmem.
206 Allow syscall debug. Used in SceKernelThreadMgr.
210 SCE_DIPSW_ENABLE_TOOL_PHYMEMPART. Allow Kernel Budget (Enable Devkit 512MiB DRAM): On: 1 - Off: 0
211 Enable usermode UART console logging: On: 1 - Off: 0. Enables SceTty2uart. Used in SceCoredump.
212 Enable PA memory mapping for usermode. Used in NSKBL and SceSysmem, ScePamgr. Works with dipsw 213.
213 PA memory mapping address. 1 to use PA 0x78000000 0x8000000-bytes. 0 to use PA 0x80000000 0x20000000-bytes. Used in NSKBL and SceSysmem, ScePamgr. Works with dipsw 212.
214 Disable ASLR: Disabled: 1 - Enabled: 0.
215 Disable DECI4P System Debug process Trace: Disabled: 1 - Enabled: 0.
216 Wipe kernel stack by 0xFF: On: 1 - Off: 0.
217 Enable path logging: On: 1 - Off: 0. Used in SceIofilemgr. If set, SceKernelThreadMgr sets kernel thread stack size to 0x4000-bytes instead of 0x1000-bytes.
218 Ignore app keystone error in SceAppMgr: On: 1 - Off: 0.
222 Enable KBL Simple Memory Test over ScePowerScratchPad32KiB: On: 1 - Off: 0. See Physical Memory, SKBL.
223 Enable KBL Simple Memory Test over Secure DRAM: On: 1 - Off: 0. See Physical Memory, SKBL.

System control flags

Bits 224-255 are used for various system options.

Bit Description
224 SCE_DIPSW_PSP2_CONFIG_SD Enable sdbgp's sysmemChecker. Allow plain psp2-config. Allows loading sd0:psp2-config.txt.
225 L2 Cache Disabled? (0 = L2 Cache ON, 1 = L2 Cache OFF). Used in SceSysmem, NSKBL when doing something with exception stacks
228 Enables hardware break/watch point. Used in SKBL, SceProcessmgr and SceKernelThreadMgr. SKBL seems to enable/disable unknown devices. SceKernelThreadMgr copies some process info to SceKernelThreadObject related to breakpoints.
229 HDCP enable/disable. Used in SceAudio.
230 Enable initialization of sd0 and ur0. Used in SceExfatfs, ?SceIofilemgr?.
231 Enable initialization of os0. Used in SceExfatfs, SceIofilemgr.
232 ? Used in second_loader. DIP Switches 232, 240 and 241 are related.
233 Used in SceSdstor on System Software version 1.50.
236 GPU overclock. When enabled, GPU and GPU Xbar are overclocked from 111MHz to 166MHz.
237 Probably underclock/overclock related. On FW 0.990 (but not on FW 0.931 nor 3.60), this is the only DIP switch out of range 0-63 that can be set from usermode.
238 Underclock. When enabled, something is underclocked from 222MHz to 111MHz.
239 Underclock/overclock related.
240 Disable QA flags. Used in second_loader. DIP Switches 232, 240 and 241 are related.
241 Disable QA flags 0xD mask 1 and 0xE mask 1. Used in second_loader. DIP Switches 232, 240 and 241 are related.
250 Enable "tty0:"
251 Enable "dummytty0:". Also allow sysmodule load from host0: (SceSysmodule debug).
252 Allow host0: access. Used in SceSysStateMgr, SceSblFwLoader.
253 Enable some console logging: On: 1 - Off: 0. Used in NSKBL. Related to remote power control in (old?) deci4p_dfctl.skprx

Boot type indicator 1

We ignore the official name so we name it Boot type indicator 1.

  • 0x1: external boot mode. It is used in manufacture image to boot in external mode. It cannot be set in release second_loader.
  • 0x2: SKBL has been loaded from GCSD
  • 0x4: product mode. manufacturing mode (Mgmt bit 0)
  • 0x8: seems to be never set in release second_loader. Required by FW 0.931 SKBL to perform memory tests.
  • 0x40: use special Media Type. Never set in release second_loader. Used in NSKBL when loading modules from sd0:.
  • 0x10000: jig handshake5 status, bypasses current system software version checks
  • 0x20000: resume mode. Disables boot logo display.
  • 0x40000: manufacturing mode (Mgmt bit 0) and GCSD initialized (for mounting sd0:) by second_loader using Syscon command 0x888.
  • 0x80000: sd mode (Mgmt bit 1). SceExfatfs checks this flag before mounting sd0:.

Sleep Factor

This is a guessed name. A possible name is "Wakeup Req" from PSP function name sceSysconGetWakeUpReq.

Used in SceSysmem#sceKernelSysrootIsUsbEnumWakeupForKernel.

  • 1 bsod reboot (or other serious factors)
  • 4 seen on a DEM-3000G running System Software 0.930.010
  • 0x10 bsod poweroff
  • 0x60 seen on a PCH-11xx
  • 0x400 seen on a PCH-1xxx in Manufacturing mode
  • 0x20000 unknown

Wakeup Factor

Wakeup Factor is only 2 bytes but to preserve alignment, in KBL Param it is extended to 4 bytes.

  • 00 00 00 00 coldboot on a DEM-3000H
  • 01 XX XX XX unknown
  • 04 00 00 00 reboot
  • 0E XX XX XX related to USB Enum Wakeup(maybe devkit)
  • 0F 00 00 00 USB Enum Wakeup
  • 14 00 00 00 boot with power hold
  • 00 FF 00 00 maybe coldboot
  • 04 FF 00 00 reboot
  • 14 FF 00 00 boot with power hold
  • 16 FF 00 00 boot by charge cable
  • 17 XX 00 00 BSOD reboot
  • 80 00 00 00 after suspend

Deduction:

  • 1: Maybe do not show lock screen
  • 2: USB enum wakeup
  • 4: reboot
  • 0x8: BSOD
  • 0xB: goes to safe mode
  • 0x10: anormal boot
  • 0x1F: goes to safe mode
  • 0x20: unknown
Wakeup factor bits description
Bitmask Usage Notes
0xFF00 Unknown ?battery related?
0x0080 Resume flag Set when unit is resuming
0x007F Wakeup reason Indicates why the unit has been powered on. May be a bitflag or an enumeration.

Boot Controls Info

This information can be parsed the same way as in SceSysconControl.

Keys combo:

  • Enter Safe mode: Power + PS + R
  • Rebuild Database: Power + PS + R + (Square or Cross)
  • Set Production Mode On for Prototype: Power + PS + Square + Cross + Up + Left
  • Set Production Mode On: Power + PS + R + Square + Cross (not present on FW 0.931, present on FWs 0.940+)

Note:

  • Set Production Mode On combos are not needed on genuine PS TV in Wakeup Factor flag 0x20 and are only checked when Wakeup Factor flags 0xB or 0x20 are set.
  • Set Production Mode On requires Jig connected else it fails with error 0x800F0A05 on set_pm STEP 8657.

Hardware Info

Hardware Info is got from Ernie.

It can be obtained using SceSyscon#sceSysconGetHardwareInfoForDriver. It can also be seen in the packet header in Syscon Update.

The following list is ordered by Ernie firmware version, which should approximately match the hardware revision order.

  • 0x00101003: supports FW 0.931.010
  • 0x00102003: supports FW 0.931.010
  • 0x00314000: supports FW 0.931.010
  • 0x00102403: supports FW 0.931.010-1.692.000
  • 0x00315000: certainly DEM-3000G (IRT-001), supports FW 0.931.010-1.692.000
  • 0x00102603: supports FW 0.940.000-3.680.011
  • 0x00315200: certainly DEM-3000H (IRT-001), supports FW 0.940.000-1.692.000
  • 0x00411000: supports FW 0.990.030-1.692.000, Product Sub Code 7, 9 or 0xA probably
  • 0x00414000: DEM-3000K (IRT-002), supports FW 0.990.030-1.692.000, Product Sub Code 9
  • 0x00415000: DEM-3000L (IRT-002), supports FW 0.995.070-1.692.000, Product Sub Code 0xB
  • 0x00415200: certainly DEM-3000P (IRT-002), supports FW 0.996.070-3.680.011, Product Sub Code 0xC probably
  • 0x00416000: PDEL-10XX, DEM-3000JEC third revision (IRT-002), supports FW 1.000-3.730, Product Sub Code 0xF, 0x10
  • 0x00404000: unknown DEX model, CEM-3000, supports FW 0.990-1.692.000
  • 0x00404100: unknown DEX model, CEM-3000, supports FW 0.990-1.692.000
  • 0x00404400: unknown DEX model, CEM-3000, supports FW 0.990-1.692.000
  • 0x00404600: DEX model, CEM-3000NE2, supports FW 0.990-1.692.000
  • 0x00404800: unknown DEX model, supports FW 1.660-1.692.000
  • 0x00405000: unknown DEX model, supports FW 1.660-3.720
  • 0x00405200: unknown DEX model, supports FW 1.660-3.720
  • 0x00406000: PCH-10XX / PTEL-10XX (Product Sub Code 0x10) (IRS-002 without 3G PCIe); ?CEM-3000VP1? / CEM-3000NP1 / TEFV-1000PV1 (Product Sub Code 0xF) -> supports FW 1.000-3.740
  • 0x00406002: PCH-11XX (IRS-002 with 3G PCIe), supports FW 1.040-3.740
  • 0x0051XXXX: Prototype PS TV.
  • 0x00601000: unknown TOOL/DEX/CEX model (IRS-1001), supports FW 1.800-3.740
  • 0x00602000: unknown DEX/CEX model (IRS-1001), supports FW 1.800-3.740
  • 0x00603000: unknown DEX/CEX model (IRS-1001), supports FW 1.800-3.740
  • 0x00603200: PCH-10XX / PCH-11XX (IRS-1001), supports FW 1.800-3.740
  • 0x00703000: CEM-3000P01 (DOL-1001), supports FW 2.500-3.740
  • 0x00703030: VTE-10XX (DOL-1001), supports FW 2.500-3.740
  • 0x00805038: PCH-20XX / PTEL-20XX (USS-1001), supports FW 2.500-3.740
  • 0x00723030: VTE-10XX (DOL-1002), supports FW 3.300-3.740
  • 0x00822238: PCH-20XX (USS-1002), supports FW 3.500-3.740
  • 0x0090XXXX: Unknown prototype.

Bytes meaning

As PS Vita uses little-endian, we describe here in the same order, from the lowest to the highest.

First byte

This byte indicates the presence of some components. It works by bit flags:

  • 0x01: ?has SD card reader? (some DevKits and prototypes)
  • 0x02: has WWAN (3G modem). This is what SceBbmc checks to know if 3G modem is supported.
  • 0x04: unknown
  • 0x08: ?has microUSB? (Slim only)
  • 0x10: is MC emu capable (Slim and PS TV only). MC Emulation is done by partitionning the internal memory EMMC.
  • 0x20: has hw_info_2 (Slim and PS TV only)
  • 0x40: is Show mode
  • 0x80: is IDU mode

Second byte

This byte indicates the motherboard minor version. It is relative to the motherboard main version which is indicated by third byte.

Third byte

This byte indicates the motherboard main version:

  • 10 -> unknown prototype motherboard, has Syscon, maybe IRS-001
  • 31 -> IRT-001
  • 40 -> IRS-002
  • 41 -> IRT-002
  • 51 -> PS TV prototype motherboard
  • 60 -> IRS-1001
  • 70 -> DOL-1001
  • 72 -> DOL-1002
  • 80 -> USS-1001
  • 82 -> USS-1002
  • 90 -> unknown prototype motherboard

We can also guess that flag 1 means that the console has a Communication Processor.

Fourth byte

This byte is reserved in case 3 bytes becomes not enough to handle all Hardware Info:

  • 00 -> default, unused

Power Info

Experimental point of view

- No AC connected + No POWER Button pressed: 0x0
ex: rebooting by software PS Vita when AC is not connected

- No AC connected + POWER Button pressed: 0x4
ex: booting PS Vita by pressing POWER button when AC is not connected

- AC connected + No POWER Button pressed: 0x8
ex: rebooting by software PS Vita when AC is connected
ex: autobooting PS TV/IDU PS Vita by pluging AC

- AC connected + POWER Button pressed: 0xC
ex: powering off by software PS TV then booting it by pressing POWER button
ex: booting PS Vita by pressing POWER button when AC is connected

Bit flags point of view

Bit Description
0 unknown. Not seen.
1 unknown. Not seen.
2 POWER button: pressed: 1 - not pressed: 0
3 AC: connected: 1 - disconnected: 0 (note that PS TV always has AC connected)

Hardware Info 2

Hardware Info 2 is supported since System Software version 2.10. It is an extension to Hardware Info

Hardware Info 2 is got from Syscon command 6.

It can be obtained using SceSyscon#sceSysconGetHardwareInfo2ForDriver.

Bit Description
1 (0x2) unknown
4 (0x8) Related to display
5 (0x20) unknown
6 (0x40) Conexant Codec IC (1 = present, 0 = not present)
7 (0x80) unknown
14 (0x4000) unknown

Seen values:

  • 0 on a Fat PS Vita with IRS-002
  • 7 on a Slim PS Vita with USS-1001
  • 0x247 on a Slim PS Vita with USS-1002

Types

typedef struct SceDIPSW {
  uint32_t cp_timestamp_1;
  uint16_t cp_version;
  uint16_t cp_build_id;
  uint32_t cp_timestamp_2;
  uint32_t aslr_seed;
  uint32_t sce_sdk_flags;
  uint32_t shell_flags;
  uint32_t debug_control_flags;
  uint32_t system_control_flags;
} SceDIPSW;

typedef struct SceKblParam {
  uint16_t version;
  uint16_t size;
  uint32_t current_fw_version;
  uint32_t min_fw_version;
  uint32_t unk_C;
  uint32_t unk_10;
  uint8_t unk_14[0xC];
  uint8_t qa_flags[0x10];
  uint8_t boot_flags[0x10];
  SceDIPSW dipsw;
  SceKernelPARange dram;
  uint32_t unk_68;
  uint32_t boot_type_indicator_1;
  SceOpenPsId openpsid;
  SceKernelPARange secure_kernel_enp;
  SceKernelPARange context_auth_sm_self;
  SceKernelPARange kprx_auth_sm_self;
  SceKernelPARange prog_rvk_srvk;
  ScePsCode pscode;
  uint32_t __stack_chk_guard;
  uint8_t unk_AC[4];
  uint8_t session_id[0x10];
  uint32_t sleep_factor;
  uint32_t wakeup_factor;
  uint32_t unk_C8;
  uint32_t boot_controls_info;
  uint32_t resume_context_paddr;
  uint32_t hardware_info;
  uint32_t power_info;
  uint8_t unk_DC[0xC];
  uint8_t hardware_info_2[0x10];
  uint32_t bootldr_revision;
  uint32_t magic;
  uint8_t coredump_session_key[0x20];
  uint8_t unused[0xE0];
} __attribute__((packed)) SceKblParam;
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