KBL Param

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 by 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 cmd 3.
0xC4	0x4	second_loader	Wakeup Factor. Comes from syscon cmd 0x10.
0xC8	0x4	second_loader	Unknown, contains USB info. Comes from syscon cmd 0x800 (?device model dependant?). (ex: 0x40 PSVita usually, 0x60 PSTV 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 cmd 0x100.
0xD0	0x4	second_loader	suspendinfo_adr. Resume context physical address. Comes from syscon cmd 0x90 offset 0xC.
0xD4	0x4	second_loader	Hardware Info. Comes from syscon cmd 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 flags. Comes from syscon cmd 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

We are need setting QA flags to

 SNVS mgmt qaf init flag
 SNVS sector 0x15 qafv write
 NVS qaf enable area
 Write Qaf token to NVS at offset 0x400 (0x80-bytes)
 Write Qaf RSA signature to NVS at offset 0x5A0 (0x100-bytes)
 Dipsw qaf enable bit (clear to bit 0xF0)

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)	Description	Used in
Byte 0x6 - mask 2	Allow ScreenShot Always, Np Full Test, Limited Debug Menu Display	Shell, Settings
Byte 0x9 - mask 0x1		Used on FW 0.931 by SceSblACMgrForKernel_F7524073
Byte 0xB - mask 0x4	Use qa spsfo key. If no set, Overwrite qa spsfo key by spsfo key.	kprx_auth_sm
Byte 0xB - mask 0x10	Allow MagicGate, Bypass platform (Test/Tool/Diag) requirement for loading of fSELF with attribute 128	secure_kernel
Byte 0xC - mask 2	Allow All Debug Menu Display	Settings
Byte 0xC - mask 4	Skip version checks in system updates, Allow DevKit PspEmu	Updater, compat_sm
Byte 0xD - mask 1	Allow Kernel Debug (NSKBL logging level set to 0 instead of 1/2, 1 instead of 2, deci4p_sdbgp), CMeP Debug, USB Enum Wake Up Debug Menu	secure_kernel, most NS and S kernel modules
Byte 0xD - mask 2	Allow Remote Sysmodule Load (host0:), Dictates if you can pass arguments to sceAppMgrLaunchAppByPathForDriver	secure_kernel, SceAppMgr
Byte 0xE - mask 1	Allow Remote SM and Kernel module Load (host0:), Allow ASLR Disable, Force Load Kernel Module in NSKBL (loop until success)	second_loader, secure_kernel, NSKBL
Byte 0xF - mask 1	Allow NonQA Pup, Minimum Debug Menu Display, Enable DMAC5 keyset 0x10001 in kprx_auth_sm	kprx_auth_sm (DMAC5 key related), secure_kernel, update_service_sm, Updater, Settings
Byte 0xF - mask 2	unknown	update_service_sm

To check: Byte 0xF bit 7, byte 0xE bit 7, byte 0xE bit 6, byte 0xB bit 3: Revocation related.

The data below contain QA Flags captured (at 0x20 in KBL Param and 0x10 in decrypted QA token) from multiple PS Vita System Debugger units (DEM-3000H, DEM-3000L, DEM-3000JEC and PDEL-1000 System Debuggers):

Offset(h) 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
00000020  33 00 00 00 00 00 07 05 73 01 00 01 06 03 03 01  3.......s.......

Boot flags

These Boot flags come from Ernie NVS.

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

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

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

Bit	Description
47	use internal storage

• byte 0: 0xFF - not update mode
• byte 1: 0xFF - extra UART not enabled
• byte 3: 0xFF - not safe mode
• byte 4: 0xFF - unknown, maybe not used on FWs <= 0.995
• byte 5: 0xFF on FAT - no internal storage or on PSTV or SLIM - internal storage enabled, 0xFE on PSTV or SLIM - internal storage disabled, maybe not used on FWs <= 0.995

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 Retail and TestKit) (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.

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
187		Allow processes to run on all cores (CPU affinity): On: 1 - Off: 0

Debug control flags

Bits 192-223 are for various debug options.

Bit	Description
192	?
193	Enable SDbgSdio, deci4p_sdfmgr, deci4p_sttyp
194	Enable CP (if disabled it disables Cpup, DbgSdio and UsbDbg)
195	Disable USB Debug. nouse_dbgusb (if enabled, SceUsbDbg does not init).
196	Enable kernel UART console logging (if enabled, UART is initialized and SceDebug handlers are set to UART functions). Or disable remote power control.
197	Enable kernel console logging: On: 1 - Off: 0
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.
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 to syscall debug. Used by SceKernelThreadMgr.
210	Allow Kernel Budget (Enable Devkit 512MiB DRAM): On: 1 - Off: 0
211	Enable usermode UART console logging. Enables SceTty2uart. Used in SceCoredump.
212	Mapping secret memory. Used in NSKBL and SceSysmem, ScePamgr. Works with dipsw 213.
213	Mapping option. Used in NSKBL and SceSysmem, ScePamgr. Works with dipsw 212.
214	Disable ASLR.
215	Maybe Enable DECI4P System Debug process Trace.
216	Wipe SceKernelBootStackCore0 in NSKBL: On: 1 - Off: 0. Used on FW 0.990 by functions SceKernelThreadMgr#SceThreadmgrForKernel_CA84C603 and SceKernelThreadMgr#SceThreadmgrForKernel_05F5306C and on FW 3.60 by NSKBL.
217	Enable path logging. Used by SceIofilemgr. If set, SceKernelThreadMgr sets kernel thread stack size to 0x4000-bytes instead of 0x1000-bytes.
222	Enable KBL Simple Memory Test over ScePowerScratchPad32KiB. See Physical Memory, SKBL.
223	Enable KBL Simple Memory Test over Secure DRAM. See Physical Memory, SKBL.

System control flags

Bits 224-255 are used for various system options.

Bit	Description
224	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
231	used by SceIofilemgr
232	? Used in second_loader. DIP Switches 232, 240 and 241 are related.
236	GPU overclock. When enabled, GPU and GPU Xbar are overclocked from 111MHz to 166MHz.
237	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 to sysmodule loading from host0: (SceSysmodule debug).
252	Allow host0: access. Used in SceSysStateMgr, SceSblFwLoader.
253	Enable some console logging: On: 1 - Off: 0. Used in NSKBL.

if ((System control flags & 1) != 0) {
// not allow load QA flag
} else {
// allow load QA flag
}

if ((System control flags & 2) != 0) {
// clear qa flags
// (sceSblQafMgrIsAllowKernelDebugForDriver, SceQafMgrForDriver_52B4E164, SceQafMgrForDriver_082A4FC2 and SceQafMgrForDriver_883E9465 functions will return false)
}

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 internal FWs to boot in external mode. It cannot be set in external (release) second_loader.
• 0x2: seems to be never set in external (release) second_loader
• 0x4: product mode. manufacturing mode (Mgmt bit 0)
• 0x8: seems to be never set in external (release) second_loader. Required by FW 0.931 SKBL to perform memory tests.
• 0x40: use special media type. Never set in external (release) second_loader. Used in NSKBL when loading modules from sd0:.
• 0x10000: seems to be never set in external (release) second_loader, allows to bypass current fw check for module loading
• 0x20000: on resume, no boot logo
• 0x40000: manufacturing mode (Mgmt bit 0) and GCSD initialized (for mounting sd0:) by second_loader using Ernie command 0x888
• 0x80000: ?sd mode? - (Mgmt bit 1)

Sleep Factor

This is a guessed name.

Used by SceSysmem#sceKernelSysrootIsUsbEnumWakeupForKernel.

• 1 bsod reboot (or other serious factors)
• 0x10 bsod poweroff
• 0x400 usually
• 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
• 0x80: resume from suspend mode
• 0xFF00: ?battery related?

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 PSTV 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 or SceSyscon#sceSysconGetHardwareInfo2ForDriver. It can also be seen in the packet header in Syscon Update.

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

• 0x00101003: supports FW 0.931
• 0x00102003: supports FW 0.931
• 0x00314000: supports FW 0.931
• 0x00102403: supports FW 0.931-1.691
• 0x00315000: certainly DEM-3000G (IRT-001), supports FW 0.931-1.691
• 0x00102603: supports FW 0.940-3.68
• 0x00315200: certainly DEM-3000H (IRT-001), supports FW 0.940-1.691
• 0x00411000: certainly DEM-3000JEC (IRT-002), supports FW 0.990-1.691, Product Sub Code 7, 9 or 0xA probably
• 0x00414000: DEM-3000K (IRT-002), supports FW 0.990-1.691, Product Sub Code 9
• 0x00415000: DEM-3000L (IRT-002), supports FW 0.996-1.691, Product Sub Code 0xB
• 0x00415200: certainly DEM-3000P (IRT-002), supports FW 0.996-3.68, Product Sub Code 0xC or 0xF probably
• 0x00416000: PDEL-10XX (IRT-002), supports FW 1.000-3.68, Product Sub Code 0x10
• 0x00404000: unknown DEX model, CEM-3000, supports FW 0.990-1.692
• 0x00404100: unknown DEX model, CEM-3000, supports FW 0.990-1.692
• 0x00404400: unknown DEX model, CEM-3000, supports FW 0.990-1.692
• 0x00404600: DEX model, CEM-3000NE2, supports FW 0.990-1.692
• 0x00404800: unknown DEX model, supports FW 1.66-1.692
• 0x00405000: unknown DEX model, supports FW 1.66-3.68
• 0x00405200: unknown DEX model, supports FW 1.66-3.68
• 0x00406000: PCH-10XX / PTEL-10XX (IRS-002 without 3G PCIe) -> supports FW 1.04-3.73, CEM-3000NP1 -> supports FW 1.00-3.73
• 0x00406002: PCH-11XX (IRS-002 with 3G PCIe), supports FW 1.04-3.73
• 0x0051XXXX: Prototype PS TV.
• 0x00601000: unknown TOOL/DEX/CEX model (IRS-1001), supports FW 1.80-3.73
• 0x00602000: unknown DEX/CEX model (IRS-1001), supports FW 1.80-3.73
• 0x00603000: unknown DEX/CEX model (IRS-1001), supports FW 1.80-3.73
• 0x00603200: PCH-10XX / PCH-11XX (IRS-1001), supports FW 1.80-3.73
• 0x00703000: CEM-3000P01 (DOL-1001), supports FW 2.50-3.73
• 0x00703030: VTE-10XX (DOL-1001), supports FW 2.50-3.73
• 0x00805038: PCH-20XX / PTEL-20XX (USS-1001), supports FW 2.50-3.73
• 0x00723030: VTE-10XX (DOL-1002), supports FW 3.30-3.73
• 0x00822238: PCH-20XX (USS-1002), supports FW 3.50-3.73
• 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: ?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: ?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.

 - Used by SceDs3. If the registry "/CONFIG/SYSTEM/dualshock4_usb" is enabled, is ds4 also available?

• 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 PSVita when AC is not connected

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

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

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

Bit flags point of view

Bit	Description
0	AC: connected: 1 - disconnected: 0 (note that PSTV always has AC connected)
1	POWER button: pressed: 1 - not pressed: 0

Hardware flags

Bit	Description
1 (0x2)	unk
4 (0x8)	Related to display
5 (0x20)	unk
6 (0x40)	Conexant Codec IC (1 = yes, 0 = no)
7 (0x80)	unk
14 (0x4000)	unk

• all zeroes on most cases
• seen values:
  • ?0x0? on a Fat PS Vita with IRS-002
  • 0x7 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_flags[0x10];
  uint32_t bootldr_revision;
  uint32_t magic;
  uint8_t coredump_session_key[0x20];
  uint8_t unused[0xE0];
} __attribute__((packed)) SceKblParam;