Difference between revisions of "Ernie"

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−
Ernie is the codename for the Syscon chip. The Syscon is for exemple responsible for handling button input (including power button), reading/writing to non-volatile storage (NVS) for storing system flags (mostly encrypted and signed). For example IDU flag is stored in NVS. Syscon is also responsible for maintaining the physical address to the resume buffer during [[Suspend]]. Communication between [[Kermit]] and Syscon is mainly through SPI (see [[SceSyscon]]) but there are also some GPIO pins connecting the two. The chip model is NEC/Renesas <code>uPD79F0109</code> and is likely custom designed for Sony.  
+
Ernie is the codename for the Syscon chip. The Syscon is for exemple responsible for handling button input (including power button), reading/writing to non-volatile storage (NVS) for storing system flags (mostly encrypted and signed). For example IDU flag is stored in NVS. Syscon is also responsible for maintaining the physical address to the resume buffer during [[Suspend]]. Communication between [[Kermit]] and Syscon is mainly through SPI (see [[SceSyscon]]) but there are also some GPIO pins connecting the two. The chip model is NEC/Renesas <code>uPD79F0109</code> and is likely custom designed for Sony.
  
 
See also: [[Ernie Secure]]
 
See also: [[Ernie Secure]]
Line 100: Line 100:
 
</pre>
 
</pre>
  
−
Then another set of shared sequence. Some differences in the warmboot responses though. On line 18, <pre>FF BF FF 74</pre> becomes <pre>FF FF FF 74</pre>. On line 12, the <pre>00 00 00 00</pre> becomes the address of the resume buffer (ex <pre>F0 1E 1F 41</pre>).
+
Then another set of shared sequence. Some differences in the warmboot responses though. On line 18, <pre>FF BF FF 74</pre> becomes <pre>FF FF FF 74</pre>. On line 12, the <pre>00 00 00 00</pre> becomes the physical address of the resume context buffer. Example:
 +
<pre>F0 1E 1F 41</pre>
  
 
<pre>
 
<pre>
Line 180: Line 181:
 
Commands are listed in the order seen in cold boot. The numbers in the captured packets indicate the assumed order with some unused packets filtered out (they appear to be resent). The ordering and grouping are assumed and may contain errors.
 
Commands are listed in the order seen in cold boot. The numbers in the captured packets indicate the assumed order with some unused packets filtered out (they appear to be resent). The ordering and grouping are assumed and may contain errors.
  
−
== CMD 0x0001 ==
+
== CMD 0x0001 - GetBaryonVersion ==
−
Gets some device specific version. Maybe chipset revision? Can also be seen in the packet header in [[Syscon Update]]. Also sent at kernel boot.
+
 
 +
Gets version of the current installed Ernie firmware. Can also be seen in the packet header in [[Syscon Update]]. Also sent at kernel boot.
 +
 
 
<pre>
 
<pre>
 
SEND 1    > [2.881037083333333] 0x0001, payload=[ | ], chk=0xFD
 
SEND 1    > [2.881037083333333] 0x0001, payload=[ | ], chk=0xFD
Line 193: Line 196:
 
== CMD 0x0005 - GetHardwareInfo ==
 
== CMD 0x0005 - GetHardwareInfo ==
  
−
See [[Sysroot#Hardware_Info]].
+
See [[KBL Param#Hardware_Info]].
  
 
<pre>
 
<pre>
Line 200: Line 203:
 
</pre>
 
</pre>
  
−
== CMD 0x0002 ==
+
== CMD 0x0002 - GetBaryonTimestamp ==
−
Gets syscon version string. Likely refers to hardware version. Also sent at kernel boot.
+
 
 +
Gets syscon firmware timestamp. Also sent at kernel boot.
 +
 
 
<pre>
 
<pre>
 
SEND 3    > [2.882249083333333] 0x0002, payload=[ | ], chk=0xFC
 
SEND 3    > [2.882249083333333] 0x0002, payload=[ | ], chk=0xFC
Line 227: Line 232:
 
== CMD 0x0010 - GetWakeupFactor ==
 
== CMD 0x0010 - GetWakeupFactor ==
  
−
See [[Sysroot#Wakeup factor|Wakeup factor]].
+
See [[KBL Param#Wakeup factor|Wakeup factor]].
  
 
Boot type indicator. 0xFF14 on cold boot. 0xFF80 on resume boot.
 
Boot type indicator. 0xFF14 on cold boot. 0xFF80 on resume boot.
Line 326: Line 331:
 
</pre>
 
</pre>
  
−
== CMD 0x0090 - VS Read ==
+
== CMD 0x0090 - Scratch Pad Read ==
  
−
This command reads data from Ernie Volatile Storage. This is the inverse of command 0x91.
+
This command reads data from Ernie Scratch Pad. This is the inverse of command 0x91.
  
 
This is used for example to fetch the saved resume context buffer physical address. Kernel sets this before suspending and this value is passed to the resume function. See [[Suspend]]. The format is 2 byte offset and 1 byte length.
 
This is used for example to fetch the saved resume context buffer physical address. Kernel sets this before suspending and this value is passed to the resume function. See [[Suspend]]. The format is 2 byte offset and 1 byte length.
Line 339: Line 344:
 
</pre>
 
</pre>
  
−
== CMD 0x0091 - VS Write ==
+
== CMD 0x0091 - Scratch Pad Write ==
  
−
This command writes data to Ernie Volatile Storage. This is the inverse of command 0x90.
+
This command writes data to Ernie Scratch Pad. This is the inverse of command 0x90.
 +
 
 +
== CMD 0x0800 - Get USB Info ==
 +
 
 +
See [[KBL Param]].
  
−
== CMD 0x0800 ==
 
−
Unknown.
 
 
<pre>
 
<pre>
 
SEND 17  > [3.225828583333334] 0x0800, payload=[ | ], chk=0xF6
 
SEND 17  > [3.225828583333334] 0x0800, payload=[ | ], chk=0xF6
Line 350: Line 357:
 
</pre>
 
</pre>
  
−
== CMD 0x0100 - GetBootControlsInfo ==
+
== CMD 0x0100 - GetControlsInfo ==
  
−
See [[Sysroot#Boot Controls Info|Boot Controls Info]].
+
See [[KBL Param#Boot Controls Info|Boot Controls Info]].
  
 
<pre>
 
<pre>
Line 361: Line 368:
 
== CMD 0x0003 - GetSleepFactor ==
 
== CMD 0x0003 - GetSleepFactor ==
  
−
See [[Sysroot#Sleep Factor|Sleep Factor]].
+
See [[KBL Param#Sleep Factor|Sleep Factor]].
  
 
<pre>
 
<pre>
Line 370: Line 377:
 
== CMD 0x0006 - Get Hardware flags ==
 
== CMD 0x0006 - Get Hardware flags ==
  
−
See [[Sysroot#Hardware flags|Hardware flags]].
+
See [[KBL Param#Hardware flags|Hardware flags]].
  
 
<pre>
 
<pre>
Line 394: Line 401:
 
</pre>
 
</pre>
  
−
== CMD 0x0103 ==
+
== CMD 0x0103 - Get Multi Connector Info ==
−
Unknown. Likely happens after initial boot.
+
 
 +
Likely happens after initial boot.
 +
 
 
<pre>
 
<pre>
 
SEND 27  > [4.177586083333333] 0x0103, payload=[ | ], chk=0xFA
 
SEND 27  > [4.177586083333333] 0x0103, payload=[ | ], chk=0xFA
 
RESP 27  < [4.177586083333333] 0x0000, flags=00, payload=[00 FF 04 00 | ....], chk=0xF6, unk=0x31
 
RESP 27  < [4.177586083333333] 0x0000, flags=00, payload=[00 FF 04 00 | ....], chk=0xF6, unk=0x31
 
</pre>
 
</pre>
 +
 +
= Syscon Scratch Pad =
 +
 +
{| class="wikitable"
 +
|-
 +
! Offset !! Size !! Name !! Comment !! Used by
 +
|-
 +
| 0x0 || 8 || unknown ||  ||
 +
|-
 +
| 0x8 || 4 || Syscon power on time || ex on DevKit: 0xA, 0x16, 0x1F, 0x24. ex on retail: 0x01BC0CD0, 0x05AC1AF7, 0x80000269 || [[SceRtc#sceRtcSetCurrentTickForDriver]]
 +
|-
 +
| 0xC || 4 || Resume context physical address || Set on retail. Not set on DevKit. ex: 0x411F1EF0 || second_loader
 +
|-
 +
| 0x10 || 5 || Current Tick || Set on retail and DevKit. Stored in microseconds since 01/01/0001 divided by 2^19. || [[SceRtc#sceRtcSetCurrentTickForDriver]]
 +
|-
 +
| 0x15 || 3 || padding ||  ||
 +
|-
 +
| 0x18 || 5 || Current Secure Tick || Set on retail. Not set on DevKit. || [[SceRtc#sceRtcSetCurrentSecureTickForDriver]]
 +
|-
 +
| 0x1D || 5 || Current Network Tick || Always a bit earlier than Current Tick and Current Secure Tick. || [[SceRtc#sceRtcSetCurrentNetworkTickForDriver]]
 +
|-
 +
| 0x22 || 5 || unknown Tick || Set on DevKit. Not set on retail. ?Current Debug Secure Tick? || [[SceRtc]]
 +
|-
 +
| 0x27 || 5 || unknown Tick || ?Current Debug Secure Tick? || [[SceRtc#SceRtcForDriver_A7236656]]
 +
|-
 +
| 0x2C || 5 || Current Debug Network Tick ||  || [[SceRtc#sceRtcSetCurrentDebugNetworkTickForDriver]]
 +
|-
 +
| 0x31 || 0x8F || unknown || Maybe reserved. Probably unused. ||
 +
|-
 +
| 0xE0 || 0x20 || [[KBL Param|CP DIP Switches]] || Set on DevKit having a CP. Hence not set on Retail nor TestKit. || ?secure_kernel? before system suspend, second_loader after system resume
 +
|}
 +
 +
== Types ==
 +
 +
<source lang="C">
 +
typedef struct SceSysconRtcTick { // size is 5 bytes
 +
  uint8_t tick[5];
 +
} SceSysconRtcTick;
 +
 +
typedef struct SceSysconScratchPad { // size is 0x100 bytes
 +
  uint8_t unk_0[8];
 +
  SceUInt32 powerOnTime;
 +
  void *resumeContextPA;
 +
  SceRtcSysconTick currentTick;
 +
  uint8_t padding[3];
 +
  SceSysconRtcTick currentSecureTick;
 +
  SceSysconRtcTick currentNetworkTick;
 +
  SceSysconRtcTick unk_22;
 +
  SceSysconRtcTick unk_27;
 +
  SceSysconRtcTick currentDebugNetworkTick;
 +
  uint8_t reserved[0x8F];
 +
  SceDIPSW dipsw;
 +
} SceSysconScratchPad;
 +
</source>
  
 
= NVS =
 
= NVS =
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On FW 3.60, NVS size is 0xB60 bytes:
 
On FW 3.60, NVS size is 0xB60 bytes:
−
* Area from 0 to 0x3FF cannot be read using sceSblSsNvsReadForKernel nor written using sceSblSsNvsWriteForKernel. This area is handled by Secure Modules.  
+
* Area from 0 to 0x3FF cannot be read using [[SceSblSsMgr#sceSblNvsReadForKernel]] nor written using [[SceSblSsMgr#sceSblNvsWriteForKernel]]. This area is handled by Secure Modules. See [[Ernie Secure#SNVS]].
−
* Area from 0x400 to 0x75F is handled by NS Kernel SceSblSsMgr.
+
* Area from 0x400 to 0x75F is handled by NS Kernel [[SceSblSsMgr]].
−
* Area from 0x760 to 0xB5F seems to be unused. It is reserved for Test and Tool consoles.
+
* Area from 0x760 to 0xB5F are reserved for Test and Tool consoles. However this area seems unused.
  
 
{| class="wikitable"
 
{| class="wikitable"
Line 414: Line 477:
 
! Offset !! Size !! Name !! Comment !! Used by
 
! Offset !! Size !! Name !! Comment !! Used by
 
|-
 
|-
−
| 0 || 0x20 || Mgmt Data || Embeds SNVS flags and ProductMode. Used for Update, PM and QAF. || "sceSblQafManagerSetFlag" (sub_81001610 on FW 0.990), "SpkgInfoUtilGetSNVSFlagStatus" and "SpkgInfoUtilSetSNVSFlagStatus" (on FW 0.931), setProductMode
+
| 0 || 0x400 || SNVS || See [[Ernie Secure#SNVS]]. ||
 
|-
 
|-
−
| 0x20 || 0x280 || SNVS Sectors || 19 XTS encrypted sectors of size 0x20 bytes handled by update_service_sm.self || "SpkgInfoUtilInitForUpdater" on FW 0.931
+
| 0x400 || 0x80 || Qaf Token || || second_loader
 
|-
 
|-
−
| 0x2A0 || 0x20 || Qa Flag Version || 0x10 bytes data + 0x10 bytes AES128CMAC || "sceSblQafManagerSetQaFlagVersion" on FW 0.940
+
| 0x480 || 0x1 || Qaf Token Flag || 1 when Qaf Token is not set (FFed), 0 when Qaf Token is set || second_loader
 
|-
 
|-
−
| 0x2C0 || 0x140 || Unknown || ||
+
| 0x481 || 0x1 || Extra UART Flag || See [[KBL Param#Boot flags]]. || second_loader
 
|-
 
|-
−
| 0x400 || 0x80 || Qaf Token || ||
+
| 0x482 || 0x1 || Unknown || || [[SceSblSsMgr#sceSblSsGetNvsDataForDriver]], [[SceSblSsMgr#sceSblSsSetNvsDataForDriver]]
 
|-
 
|-
−
| 0x480 || 1 || Is Qaf Token not set || 1 when Qaf Token is not set (FFed), 0 when Qaf Token is set ||
+
| 0x483 || 0x1 || Safe Mode Flag || See [[KBL Param#Boot flags]]. || [[SceSblSsMgr#sceSblSsGetNvsDataForDriver]], [[SceSblSsMgr#sceSblSsSetNvsDataForDriver]], second_loader
 
|-
 
|-
−
| 0x481 || 0x1F || Unknown || ||
+
| 0x484 || 0x1 || Unknown || ||
 
|-
 
|-
−
| 0x4A0 || 0x10 || [[Sysroot#Boot flags]] || || sceSblUsGetUpdateModeForUser, sceSblUsSetUpdateModeForUser
+
| 0x485 || 0x1 || Unknown || ||
 
|-
 
|-
−
| 0x4B0 || 0x30 || Unknown || ||
+
| 0x486 || 0x1 || Internal Storage Flag || See [[KBL Param#Boot flags]]. Not present on FWs 0.931-0.990. Present on FW 3.60. || [[SceSblSsMgr#sceSblSsGetNvsDataForDriver]], [[SceSblSsMgr#sceSblSsSetNvsDataForDriver]], second_loader
 
|-
 
|-
−
| 0x4E0 || 0x20 || Unknown per device ASCII string ?VisibleId? || ||
+
| 0x487 || 0x1 || Unknown || See [[KBL Param#Boot flags]]. || second_loader
 
|-
 
|-
−
| 0x500 || 0x20 || Unknown || ||
+
| 0x4A0 || 0x1 || Update Mode || See [[KBL Param#Boot flags]]. || [[SceSblUpdateMgr#sceSblUsGetUpdateModeForUser]], [[SceSblUpdateMgr#sceSblUsSetUpdateModeForUser]]
 
|-
 
|-
−
| 0x520 || 0x80 || Activation Area || first 0x20 bytes are SceNVSKitActivationData ||
+
| 0x4A1 || 0x3 || Unknown. Unused. || ||
 
|-
 
|-
−
| 0x5A0 || 0x100 || Qaf Token RSA signature || Not present on FW 0.990. Present on FW 3.60. Maybe added on FW 1.80. ||
+
| 0x4A4 || 0x4 || System Language || || [[SceRegistryMgr]], [[SceSblSsMgr#sceSblSsGetNvsDataForDriver]], [[SceSblSsMgr#sceSblSsSetNvsDataForDriver]]
 
|-
 
|-
−
| 0x6A0 || 0xC0 || Unknown || ||
+
| 0x4A8 || 0x1C || Unknown. Unused. || ||
 +
|-
 +
| 0x4C4 || 0x1 || Unknown. Set to 0 by default. || ||
 +
|-
 +
| 0x4C5 || 0x1B || Unknown. Unused. || ||
 +
|-
 +
| 0x4E0 || 0x20 || Unknown per device ASCII string of length 22 characters ?VisibleId? || || [[SceSblSsMgr#sceSblSsGetNvsDataForDriver]], [[SceSblSsMgr#sceSblSsSetNvsDataForDriver]]
 +
|-
 +
| 0x500 || 0x1 || Wlan/Bt Flag || || [[SceSblSsMgr#sceSblSsGetNvsDataForDriver]], [[SceSblSsMgr#sceSblSsSetNvsDataForDriver]], [[SceWlanBt]] module_start
 +
|-
 +
| 0x501 || 0x1F || Unknown. Unused. || ||
 +
|-
 +
| 0x520 || 0x80 || Activation Area || first 0x20 bytes are SceNVSKitActivationData || [[SceSblSsMgr]], [[SceSblPostSsMgr]]
 +
|-
 +
| 0x5A0 || 0x100 || Qaf Token RSA signature || Not present on FW 0.990. Present on FW 3.60. Maybe added on FW 1.80. || second_loader
 +
|-
 +
| 0x6A0 || 0xC0 || Unknown. Unused. || ||
 +
|-
 +
| 0x760 || 0x400 || Reserved for Test and Tool. || Seems unused. ||
 
|}
 
|}
  
Line 512: Line 593:
  
 
== Hardware Versions ==
 
== Hardware Versions ==
 +
 +
There are three hardware versions of Ernie:
 +
* NEC 78K0R/Kx3-L: present on early PS Vita prototypes (never seen)
 +
* NEC 78K0R/Kx3: present on Fat PS Vita and PS TV models, including some prototypes such as DEM-3000L
 +
* Renesas RL78/G13: present on Slim PS Vita models
 +
 +
=== NEC 78K0R/Kx3-L ===
 +
 +
Never seen yet but exists according to Ernie update packages.
 +
 +
=== NEC 78K0R/Kx3 ===
 +
 +
NEC D79F0109 (78K0R/KH3, 121 pin)
 +
 +
Device Name : D79F0109
 +
 +
Other Device Name : SK0RT02N200GV120 (on DEM-3000L and PCH-1000)
 +
 +
Label:
 +
<pre>
 +
Model <- always D79F0109
 +
Revision <- on DEM-3000H: ES1.0, blank on others
 +
Build <- XXYYZZWWW <- XX: year, YY: week, ZZ: 2 letters (unknown usage), WWW: serial number
 +
Manufacturing country <- always "MALAYSIA"
 +
</pre>
 +
 +
=== Renesas RL78/G13 ===
 +
 +
Renesas R5F1ZCRK (RL78/G13, 121 pin)
 +
 +
<pre>
 +
R5F1ZCRKABG#U0
 +
R5    Renesas MCU
 +
F      Flash
 +
1      RL78
 +
Z      Customer specific
 +
C      Product group
 +
R      121-pin
 +
K      384KB
 +
A      Consumer grade
 +
BG    VFBGA 0.4mm
 +
#U0  Tray*2
 +
</pre>
 +
 +
<pre>
 +
Device Name : R5F1ZCRK
 +
Device Code : 10 00 06
 +
Firmware Version : V3.03
 +
Code Flash 1 (Address : 0x00000000,  Size : 384 K,  Erase Size : 1 K)
 +
Data Flash 1 (Address : 0x000F1000,  Size : 8 K,  Erase Size : 1 K)
 +
</pre>
 +
 +
Label:
 +
<pre>
 +
(C) XXXX <- Year
 +
Revision <- A0xxx SCEI
 +
Build <- XXYYZZWWW <- XX: year, YY: week, ZZ: 2 letters (unknown usage), WWW: serial number
 +
Unknown data
 +
</pre>
 +
 +
== Block sizes ==
 +
 +
Ernie flash memory is erasable in blocks. Size of one block in bytes depends on the hardware version:
 +
* NEC 78K0R/Kx3-L: 0x800
 +
* NEC 78K0R/Kx3: 0x400
 +
* Renesas RL78/G13: 0x400
  
 
See also [https://playstationdev.wiki/psvitadevwiki/index.php?title=Ernie].
 
See also [https://playstationdev.wiki/psvitadevwiki/index.php?title=Ernie].
Line 521: Line 668:
 
Ernie firmware can be partly updated and downgraded with software updates embedded in PUP.
 
Ernie firmware can be partly updated and downgraded with software updates embedded in PUP.
  
−
Ernie firmware is dependant of the hardware version and detects it based on [[Sysroot#Hardware_Info|Hardware Info]].
+
Ernie firmware is dependant of the hardware version and detects it based on [[KBL Param#Hardware_Info|Hardware Info]].
  
 
=== Examples ===
 
=== Examples ===

Revision as of 22:44, 6 January 2022

Ernie is the codename for the Syscon chip. The Syscon is for exemple responsible for handling button input (including power button), reading/writing to non-volatile storage (NVS) for storing system flags (mostly encrypted and signed). For example IDU flag is stored in NVS. Syscon is also responsible for maintaining the physical address to the resume buffer during Suspend. Communication between Kermit and Syscon is mainly through SPI (see SceSyscon) but there are also some GPIO pins connecting the two. The chip model is NEC/Renesas uPD79F0109 and is likely custom designed for Sony.

See also: Ernie Secure

Boot Process

The following is logged from boot. The timestamp is in seconds (the starting time is irrelevant). The arrow at the start indicates direction: '>' means Kermit to Syscon (MOSI) and '<' means Syscon to Kermit (MISO). Then there is a 2 byte command id or response code, followed by a flag byte (response only), the payload, a checksum byte, and an (response only) unknown byte. Please note that the packets are listed in transfer order but this may not represent the logical order of the packets. It is currently unknown what the logical order should be, but one can guess that a response is "close to" a request.

First some version information seems to be sent from Syscon to Kermit. This is same for cold boot and resume boot. The last response indicates the type of boot where 0xFF80 is resume and 0xFF14 is regular boot. 

< [2.048118000000000] 0x0004, flags=00, payload=[0D 06 00 01 | ....], chk=0xE1, unk=0x00
> [2.048118000000000] 0x0001, payload=[ | ], chk=0xFD
< [2.048659583333333] 0x0004, flags=00, payload=[00 60 40 00 | .`@.], chk=0x55, unk=0x00
> [2.048659583333333] 0x0005, payload=[ | ], chk=0xF9
< [2.049330083333333] 0x0004, flags=00, payload=[32 30 31 32 31 31 30 38 31 37 30 34 | 201211081704], chk=0x92, unk=0x00
> [2.049330083333333] 0x0002, payload=[ | ], chk=0xFC
< [2.054004333333333] 0x0004, flags=80, payload=[ | ], chk=0x79, unk=0x30
> [2.054004333333333] 0x0080, payload=[12 00 | ..], chk=0x6A
< [2.058172916666666] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0x30
> [2.058172916666666] 0x0000, payload=[ | ], chk=0xFE
< [2.062716333333333] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0x30
> [2.062716333333333] 0x0080, payload=[12 00 | ..], chk=0x6A
< [2.111457750000000] 0x0004, flags=00, payload=[14 FF | ..], chk=0xE4, unk=0x32

Next some encrypted session is established. A 8 byte nonce is sent from Syscon (it appears random for each boot, cold or warm). Encrypted data from this point on always differs each boot. 

> [2.111457750000000] 0x0010, payload=[ | ], chk=0xEE
< [2.133389000000000] 0x0004, flags=80, payload=[ | ], chk=0x79, unk=0xFF
> [2.133389000000000] 0x00A0, payload=[30 00 00 0B 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | 0.......................................], chk=0xFB
< [2.150567250000000] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0xFF
> [2.150567250000000] 0x0000, payload=[ | ], chk=0xFE
< [2.155149500000000] 0x0024, flags=00, payload=[30 01 00 0B 00 00 00 00 A4 B0 EF 23 D6 9A 3A 06 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | 0..........#..:.........................], chk=0x5F, unk=0x00
> [2.155149500000000] 0x00A0, payload=[30 00 00 0B 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | 0.......................................], chk=0xFB
< [2.163572000000000] 0x0004, flags=80, payload=[ | ], chk=0x79, unk=0x01
> [2.163572000000000] 0x00A0, payload=[30 02 00 0B 01 00 00 00 6C 7F E0 79 AA 03 4B B0 96 B7 42 F0 BC F8 62 7A 35 27 53 68 3D 0D ED A7 13 F2 32 77 46 2D 54 F8 | 0.......l..y..K...B...bz5'Sh=.....2wF-T.], chk=0x9B
< [2.189271166666667] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0x01
> [2.189271166666667] 0x0000, payload=[ | ], chk=0xFE
< [2.193866583333334] 0x0024, flags=00, payload=[30 03 00 0B 00 00 00 00 7A 44 6E C8 F5 FA 35 CB 9B E9 E6 A0 B6 5C 85 1D FB A8 89 5C 9C 04 0B 29 34 59 55 EB 1D 98 AB 83 | 0.......zDn...5......\.....\...)4YU.....], chk=0xC6, unk=0x00
> [2.193866583333334] 0x00A0, payload=[30 02 00 0B 01 00 00 00 6C 7F E0 79 AA 03 4B B0 96 B7 42 F0 BC F8 62 7A 35 27 53 68 3D 0D ED A7 13 F2 32 77 46 2D 54 F8 | 0.......l..y..K...B...bz5'Sh=.....2wF-T.], chk=0x9B

Some more data is exchanged. Up until this point all the plaintext payloads appear to be the same from coldboot and warmboot. 

< [2.202246333333334] 0x0004, flags=80, payload=[ | ], chk=0x79, unk=0x03
> [2.202246333333334] 0x088E, payload=[01 22 | ."], chk=0x43
< [2.206411750000000] 0x0004, flags=00, payload=[ | ], chk=0xF9, unk=0x03
> [2.206411750000000] 0x0000, payload=[ | ], chk=0xFE
< [2.217062666666667] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0x03
> [2.217062666666667] 0x0000, payload=[ | ], chk=0xFE
< [2.221620916666667] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0x03
> [2.221620916666667] 0x088E, payload=[01 22 | ."], chk=0x43
< [2.229805500000000] 0x0004, flags=80, payload=[ | ], chk=0x79, unk=0x03
> [2.229805500000000] 0x1082, payload=[80 04 08 | ...], chk=0xDD
< [2.233887583333333] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0x03
> [2.233887583333333] 0x0000, payload=[ | ], chk=0xFE
< [2.238363416666667] 0x0024, flags=00, payload=[FF FF FF FF 01 FF FF FF | ........], chk=0xD7, unk=0x44
> [2.238363416666667] 0x1082, payload=[80 04 08 | ...], chk=0xDD
< [2.246473916666667] 0x0004, flags=80, payload=[ | ], chk=0x79, unk=0xFF

Now, there appears to be a branch. The next sequence only shows up for cold boots. 

> [2.246473916666667] 0x1082, payload=[A0 04 01 | ...], chk=0xC4
< [2.250555000000000] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0xFF
> [2.250555000000000] 0x0000, payload=[ | ], chk=0xFE
< [2.255030833333334] 0x0024, flags=00, payload=[FF | .], chk=0xD9, unk=0x00
> [2.255030833333334] 0x1082, payload=[A0 04 01 | ...], chk=0xC4
< [2.259176583333333] 0x0004, flags=00, payload=[01 01 13 00 | ....], chk=0xE0, unk=0xFF
> [2.259176583333333] 0x1100, payload=[ | ], chk=0xED
< [2.263720583333333] 0x0004, flags=80, payload=[ | ], chk=0x79, unk=0x01
> [2.263720583333333] 0x00D0, payload=[30 00 00 0F 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | 0.......................................], chk=0xC7
< [2.267827000000000] 0x0004, flags=00, payload=[ | ], chk=0xF9, unk=0x01
> [2.267827000000000] 0x0000, payload=[ | ], chk=0xFE
< [2.278339666666667] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0x01
> [2.278339666666667] 0x0000, payload=[ | ], chk=0xFE
< [2.282830833333333] 0x0024, flags=00, payload=[30 01 00 0F 00 00 00 00 E1 CA 65 96 BB 7E 81 7A 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | 0.........e..~.z........................], chk=0x97, unk=0x00
> [2.282830833333333] 0x00D0, payload=[30 00 00 0F 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | 0.......................................], chk=0xC7
< [2.291023500000000] 0x0004, flags=80, payload=[ | ], chk=0x79, unk=0x01
> [2.291023500000000] 0x00D0, payload=[30 02 00 0F 01 00 00 00 4E D7 C0 7C D5 E8 BB D7 3E 9E 43 7B B2 E3 4D 81 23 C8 C4 BF B8 4D 9B 25 0A 3D C7 45 E6 0D 23 43 | 0.......N..|....>.C{..M.#....M.%.=.E..#C], chk=0x38
< [2.295129250000000] 0x0004, flags=00, payload=[ | ], chk=0xF9, unk=0x01
> [2.295129250000000] 0x0000, payload=[ | ], chk=0xFE
< [2.305641750000000] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0x01
> [2.305641750000000] 0x0000, payload=[ | ], chk=0xFE
< [2.310132916666667] 0x0024, flags=00, payload=[30 03 00 0F 00 00 00 00 5B 3E 5C 5F 11 F9 E4 6A 85 0D 1E 06 9E F9 33 25 9B 95 55 21 39 48 FC 55 C7 BF A7 E4 32 AD FC 65 | 0.......[>\_...j......3%..U!9H.U....2..e], chk=0x55, unk=0x00
> [2.310132916666667] 0x00D0, payload=[30 02 00 0F 01 00 00 00 4E D7 C0 7C D5 E8 BB D7 3E 9E 43 7B B2 E3 4D 81 23 C8 C4 BF B8 4D 9B 25 0A 3D C7 45 E6 0D 23 43 | 0.......N..|....>.C{..M.#....M.%.=.E..#C], chk=0x38
< [2.318358166666667] 0x0004, flags=80, payload=[ | ], chk=0x79, unk=0x03
> [2.318358166666667] 0x00D0, payload=[30 04 00 0F 00 00 00 00 52 8D 6D BC 90 C9 00 EE FA CA 47 63 10 D1 4A E5 5A FD BB 91 3A 6C DA EF 64 CA 71 01 4A A9 D5 31 | 0.......R.m.......Gc..J.Z...:l..d.q.J..1], chk=0x4B
< [2.322464250000000] 0x0004, flags=00, payload=[ | ], chk=0xF9, unk=0x03
> [2.322464250000000] 0x0000, payload=[ | ], chk=0xFE
< [2.332976833333333] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0x03
> [2.332976833333333] 0x0000, payload=[ | ], chk=0xFE
< [2.337468000000000] 0x0024, flags=00, payload=[30 05 00 0F 00 00 00 00 52 8D 6D BC 90 C9 00 EE FA CA 47 63 10 D1 4A E5 5A FD BB 91 3A 6C DA EF 64 CA 71 01 4A A9 D5 31 | 0.......R.m.......Gc..J.Z...:l..d.q.J..1], chk=0xF5, unk=0x00
> [2.337468000000000] 0x00D0, payload=[30 04 00 0F 00 00 00 00 52 8D 6D BC 90 C9 00 EE FA CA 47 63 10 D1 4A E5 5A FD BB 91 3A 6C DA EF 64 CA 71 01 4A A9 D5 31 | 0.......R.m.......Gc..J.Z...:l..d.q.J..1], chk=0x4B
< [2.345696333333333] 0x0004, flags=80, payload=[ | ], chk=0x79, unk=0x05

Then another set of shared sequence. Some differences in the warmboot responses though. On line 18, 

FF BF FF 74

becomes 

FF FF FF 74

. On line 12, the 

00 00 00 00

becomes the physical address of the resume context buffer. Example: 

F0 1E 1F 41
> [2.345696333333333] 0x00D2, payload=[20 7A 3E 7B 31 DE FC 3A 11 5F 64 E7 AB A4 EC 17 | .z>{1..:._d.....], chk=0x77
< [2.349790333333333] 0x0004, flags=00, payload=[ | ], chk=0xF9, unk=0x05
> [2.349790333333333] 0x0000, payload=[ | ], chk=0xFE
< [2.360448916666666] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0x05
> [2.360448916666666] 0x0000, payload=[ | ], chk=0xFE
< [2.364930250000000] 0x0024, flags=00, payload=[9D 0B BC 4D BA 66 40 2C 63 BE F3 79 D0 31 26 1E 47 3A 64 DE 68 2F AE E2 8A B6 F0 27 37 46 89 16 0E 71 04 FA BF C9 4A A1 DF 4B EF D3 3D 0D 39 CD | ...M.f@,c..y.1&.G:d.h/.....'7F...q....J..K..=.9.], chk=0x11, unk=0x00
> [2.364930250000000] 0x00D2, payload=[20 7A 3E 7B 31 DE FC 3A 11 5F 64 E7 AB A4 EC 17 | .z>{1..:._d.....], chk=0x77
< [2.373236666666667] 0x0004, flags=80, payload=[ | ], chk=0x79, unk=0x0B
> [2.373236666666667] 0x0090, payload=[0C 00 04 | ...], chk=0x5B
< [2.377318583333333] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0x0B
> [2.377318583333333] 0x0000, payload=[ | ], chk=0xFE
< [2.381794416666667] 0x0024, flags=00, payload=[00 00 00 00 | ....], chk=0xD5, unk=0x66
> [2.381794416666667] 0x0090, payload=[0C 00 04 | ...], chk=0x5B
< [2.385879750000000] 0x0004, flags=00, payload=[40 00 | @.], chk=0xB7, unk=0x00
> [2.385879750000000] 0x0800, payload=[ | ], chk=0xF6
< [2.386382583333333] 0x0004, flags=00, payload=[FF BF FF 74 | ...t], chk=0xC4, unk=0x66
> [2.386382583333333] 0x0100, payload=[ | ], chk=0xFD
< [2.386871833333333] 0x0004, flags=00, payload=[10 00 00 00 | ....], chk=0xE5, unk=0x66
> [2.386871833333333] 0x0003, payload=[ | ], chk=0xFB
< [2.387380083333333] 0x0000, flags=3F, payload=[ | ], chk=0xBE, unk=0x00
> [2.387380083333333] 0x0006, payload=[ | ], chk=0xF8
< [2.481997666666667] 0x0000, flags=80, payload=[ | ], chk=0x7D, unk=0x00
> [2.481986333333333] 0x00D2, payload=[30 14 F4 B8 84 89 81 AB 3D 07 66 DE AE B6 D3 24 | 0.......=.f....$], chk=0x10
< [2.514678500000000] 0x0020, flags=00, payload=[ | ], chk=0xDD, unk=0x00
> [2.514678500000000] 0x0000, payload=[ | ], chk=0xFE
< [2.519163916666667] 0x0020, flags=00, payload=[1A 1F BC 74 AA 16 59 D6 5C E7 FF 5B E0 85 B2 C8 39 2D D6 95 98 2F B7 4B 71 64 34 D7 8D 2C 94 A1 91 CB 73 D7 8D E1 D0 07 E6 1E 0F DA E7 51 BC 69 | ...t..Y.\..[....9-.../.Kqd4..,....s..........Q.i], chk=0x3C, unk=0x00
> [2.519163916666667] 0x00D2, payload=[30 14 F4 B8 84 89 81 AB 3D 07 66 DE AE B6 D3 24 | 0.......=.f....$], chk=0x10
< [2.527551416666667] 0x0000, flags=80, payload=[ | ], chk=0x7D, unk=0x1F
> [2.527540083333333] 0x088E, payload=[02 29 | .)], chk=0x3B
< [2.531619416666667] 0x0000, flags=00, payload=[ | ], chk=0xFD, unk=0x1F
> [2.531619416666667] 0x0000, payload=[ | ], chk=0xFE
< [2.542392416666666] 0x0020, flags=00, payload=[ | ], chk=0xDD, unk=0x1F
> [2.542392416666666] 0x0000, payload=[ | ], chk=0xFE
< [2.546867583333333] 0x0020, flags=00, payload=[ | ], chk=0xDD, unk=0x1F
> [2.546867583333333] 0x088E, payload=[02 29 | .)], chk=0x3B

Then, the two boot paths diverge completely (also note the time jump). It is suspected that at this point the kernel is started up on coldboot, and the kernel resumes for warmboot. For cold boot only, we see the beginning init sequence again, which is likely done in SceSyscon. 

< [3.322105750000000] 0x0000, flags=00, payload=[0D 06 00 01 | ....], chk=0xE5, unk=0x16
> [3.322105750000000] 0x0001, payload=[ | ], chk=0xFD
< [3.326563916666667] 0x0000, flags=00, payload=[32 30 31 32 31 31 30 38 31 37 30 34 | 201211081704], chk=0x96, unk=0x85
> [3.326552583333333] 0x0002, payload=[ | ], chk=0xFC
< [3.331090666666667] 0x0000, flags=80, payload=[ | ], chk=0x7D, unk=0x30
> [3.331079333333333] 0x0080, payload=[12 00 | ..], chk=0x6A
< [3.331576333333333] 0x0020, flags=00, payload=[ | ], chk=0xDD, unk=0x30
> [3.331576333333333] 0x0080, payload=[12 00 | ..], chk=0x6A
< [3.332068833333333] 0x0000, flags=00, payload=[10 00 00 00 | ....], chk=0xE9, unk=0x31
> [3.332068833333333] 0x0004, payload=[ | ], chk=0xFA
< [3.332541666666667] 0x0000, flags=00, payload=[00 FF 04 00 | ....], chk=0xF6, unk=0x31
> [3.332541666666667] 0x0103, payload=[ | ], chk=0xFA
< [3.336980333333333] 0x0000, flags=00, payload=[10 00 00 00 | ....], chk=0xE9, unk=0x31
> [3.336980333333333] 0x0003, payload=[ | ], chk=0xFB
...

Packet checksum

The checksum byte of the packet is calculated as the binary negation of the sum of all the bytes of the packet (including the 2 bytes of the command id and the byte for the length). The checksum calculation can be implemented as follows: 

void syscon_calc_checksum(unsigned char packet[32], int length)
{
	int i;
	unsigned char hash = 0;
	
	for (i = 0; i < 3 + length; i++)
		hash += packet[i];

	packet[3 + length] = ~hash;
}

Commands

Commands are listed in the order seen in cold boot. The numbers in the captured packets indicate the assumed order with some unused packets filtered out (they appear to be resent). The ordering and grouping are assumed and may contain errors.

CMD 0x0001 - GetBaryonVersion

Gets version of the current installed Ernie firmware. Can also be seen in the packet header in Syscon Update. Also sent at kernel boot. 

SEND 1    > [2.881037083333333] 0x0001, payload=[ | ], chk=0xFD
RESP 1    < [2.881037083333333] 0x0004, flags=00, payload=[0D 06 00 01 | ....], chk=0xE1, unk=0x71

SEND 23   > [4.167151583333333] 0x0001, payload=[ | ], chk=0xFD
RESP 23   < [4.167151583333333] 0x0000, flags=00, payload=[0D 06 00 01 | ....], chk=0xE5, unk=0x32

CMD 0x0005 - GetHardwareInfo

See KBL Param#Hardware_Info. 

SEND 2    > [2.881578833333333] 0x0005, payload=[ | ], chk=0xF9
RESP 2    < [2.881578833333333] 0x0004, flags=00, payload=[00 60 40 00 | .`@.], chk=0x55, unk=0x71

CMD 0x0002 - GetBaryonTimestamp

Gets syscon firmware timestamp. Also sent at kernel boot. 

SEND 3    > [2.882249083333333] 0x0002, payload=[ | ], chk=0xFC
RESP 3    < [2.882249083333333] 0x0004, flags=00, payload=[32 30 31 32 31 31 30 38 31 37 30 34 | 201211081704], chk=0x92, unk=0x00

SEND 24   > [4.171598000000000] 0x0002, payload=[ | ], chk=0xFC
RESP 24   < [4.171598000000000] 0x0000, flags=00, payload=[32 30 31 32 31 31 30 38 31 37 30 34 | 201211081704], chk=0x96, unk=0xF7

CMD 0x0080

Unknown. Sends data 0x0012 on 3.60. Does not get return data. Also sent at kernel boot. 

SEND 4    > [2.895635416666666] 0x0080, payload=[12 00 | ..], chk=0x6A
RESP 4    < [2.886923416666667] 0x0004, flags=80, payload=[ | ], chk=0x79, unk=0x30
RESP 4    < [2.891092083333333] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0x30
RESP 4    < [2.895635416666666] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0x30

SEND 25   > [4.176620750000000] 0x0080, payload=[12 00 | ..], chk=0x6A
RESP 25   < [4.176123750000000] 0x0000, flags=80, payload=[ | ], chk=0x7D, unk=0x30
RESP 25   < [4.176620750000000] 0x0020, flags=00, payload=[ | ], chk=0xDD, unk=0x30

CMD 0x0010 - GetWakeupFactor

See Wakeup factor.

Boot type indicator. 0xFF14 on cold boot. 0xFF80 on resume boot. 

SEND 5    > [2.950546416666667] 0x0010, payload=[ | ], chk=0xEE
RESP 5    < [2.950546416666667] 0x0004, flags=00, payload=[14 FF | ..], chk=0xE4, unk=0x32

CMD 0x00A0

Runs twice. Appears to contain a 8 byte inner header. First packet sends all zeros and gets back a 8 byte random response. This is likely a nonce or challenge. This likely establishes an encrypted session. Encrypted data differs on each boot. There does not appear to be data transferred using the established session. 

SEND 6    > [2.994470666666667] 0x00A0, payload=[30 00 00 0B 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | 0.......................................], chk=0xFB
RESP 6    < [2.972471333333333] 0x0004, flags=80, payload=[ | ], chk=0x79, unk=0xFF
RESP 6    < [2.989889500000000] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0xFF
RESP 6    < [2.994470666666667] 0x0024, flags=00, payload=[30 01 00 0B 00 00 00 00 CA 71 11 BA 86 87 EF 0D 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | 0........q..............................], chk=0x66, unk=0x00

SEND 7    > [3.033187750000000] 0x00A0, payload=[30 02 00 0B 01 00 00 00 92 45 B4 A5 49 15 CE F2 39 0E 9E 4C BF FA 19 E6 5D CF BA 5A 6E C3 7C ED 2A 6D 4E 79 84 28 1C 2A | 0........E..I...9..L....]..Zn.|.*mNy.(.*], chk=0x97
RESP 7    < [3.002893083333333] 0x0004, flags=80, payload=[ | ], chk=0x79, unk=0x01
RESP 7    < [3.028592333333334] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0x01
RESP 7    < [3.033187750000000] 0x0024, flags=00, payload=[30 03 00 0B 00 00 00 00 12 77 A5 98 67 F7 38 9B B4 54 48 FE 84 82 CF 84 41 42 87 A2 EA D1 CF 9C 5B D1 2A 3F 1E 50 B9 3D | 0........w..g.8..TH.....AB......[.*?.P.=], chk=0x0A, unk=0x00

CMD 0x088E

Unknown. Sends data 0x2201 on 3.60 and does not get a response. 

SEND 8    > [3.061354583333333] 0x088E, payload=[01 22 | ."], chk=0x43
RESP 8    < [3.041713500000000] 0x0004, flags=80, payload=[ | ], chk=0x79, unk=0x03
RESP 8    < [3.046148250000000] 0x0004, flags=00, payload=[ | ], chk=0xF9, unk=0x03
RESP 8    < [3.056796250000000] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0x03
RESP 8    < [3.061354583333333] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0x03

CMD 0x1082 - NVS Read

Get data from NVS. 2-byte offset followed by 1 byte length. For example used to fetch boot-time flags, like Update Mode.

See SceSblSsMgr#NVS_Areas. 

Get Qaf Token area:
SEND 9    > [3.078212500000000] 0x1082, payload=[80 04 08 | ...], chk=0xDD
RESP 9    < [3.069790250000000] 0x0004, flags=80, payload=[ | ], chk=0x79, unk=0x03
RESP 9    < [3.073736583333333] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0x03
RESP 9    < [3.078212500000000] 0x0024, flags=00, payload=[FF FF FF FF 01 FF FF FF | ........], chk=0xD7, unk=0x77

Get Update Mode:
SEND 10   > [3.094879833333333] 0x1082, payload=[A0 04 01 | ...], chk=0xC4
RESP 10   < [3.086322916666667] 0x0004, flags=80, payload=[ | ], chk=0x79, unk=0xFF
RESP 10   < [3.090404000000000] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0xFF
RESP 10   < [3.094879833333333] 0x0024, flags=00, payload=[FF | .], chk=0xD9, unk=0x00

CMD 0x1100 - GetErnieDLVersion

Gets Ernie DownLoader Version i.e. version of Ernie firmware. 

SEND 11   > [3.099025500000000] 0x1100, payload=[ | ], chk=0xED
RESP 11   < [3.099025500000000] 0x0004, flags=00, payload=[01 01 13 00 | ....], chk=0xE0, unk=0xFF

CMD 0x00D0

Some encrypted transfer that looks close to Syscon#CMD 0x00A0 in format. Different on each boot. 

SEND 12   > [3.122679833333333] 0x00D0, payload=[30 00 00 0F 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | 0.......................................], chk=0xC7
RESP 12   < [3.103569583333333] 0x0004, flags=80, payload=[ | ], chk=0x79, unk=0x01
RESP 12   < [3.107676166666667] 0x0004, flags=00, payload=[ | ], chk=0xF9, unk=0x01
RESP 12   < [3.118188666666667] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0x01
RESP 12   < [3.122679833333333] 0x0024, flags=00, payload=[30 01 00 0F 00 00 00 00 9F CC 4A 69 73 E9 C0 5A 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 | 0.........Jis..Z........................], chk=0xDD, unk=0x00

SEND 13   > [3.150031916666667] 0x00D0, payload=[30 02 00 0F 01 00 00 00 98 6D 3A 1E C5 B1 E9 AF 54 65 55 91 3B DF 2B A8 0F AD B0 73 A0 A2 0F EE 5D 0A AF 41 A5 6D 32 20 | 0........m:.....TeU.;.+....s....]..A.m2.], chk=0xF4
RESP 13   < [3.130872500000000] 0x0004, flags=80, payload=[ | ], chk=0x79, unk=0x01
RESP 13   < [3.134978166666667] 0x0004, flags=00, payload=[ | ], chk=0xF9, unk=0x01
RESP 13   < [3.145539833333333] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0x01
RESP 13   < [3.150031916666667] 0x0024, flags=00, payload=[30 03 00 0F 00 00 00 00 F5 19 C0 67 09 80 C6 DB 58 8D FB E1 86 22 D1 00 DA BB D2 AF AA 51 F9 57 7C 56 92 0A 94 D6 60 4D | 0..........g....X....".......Q.W|V....`M], chk=0xF0, unk=0x00

SEND 14   > [3.177452416666667] 0x00D0, payload=[30 04 00 0F 00 00 00 00 87 4E 59 41 22 98 F8 62 BD B4 C8 4F 4C 0A 81 90 47 1E 1E 70 D6 51 57 42 E5 EC 07 A2 D4 CF E5 02 | 0........NYA"..b...OL...G..p.QWB........], chk=0x9A
RESP 14   < [3.158257166666667] 0x0004, flags=80, payload=[ | ], chk=0x79, unk=0x03
RESP 14   < [3.162363250000000] 0x0004, flags=00, payload=[ | ], chk=0xF9, unk=0x03
RESP 14   < [3.172875666666667] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0x03
RESP 14   < [3.177452416666667] 0x0024, flags=00, payload=[30 05 00 0F 00 00 00 00 87 4E 59 41 22 98 F8 62 BD B4 C8 4F 4C 0A 81 90 47 1E 1E 70 D6 51 57 42 E5 EC 07 A2 D4 CF E5 02 | 0........NYA"..b...OL...G..p.QWB........], chk=0x44, unk=0x00

CMD 0x00D2 - SNVS RW

This command is used twice during boot and also quite often after boot. Data is different on each boot. Encrypted session using key from handshake above. Second transaction seems to be the firmware version data written during the update process. Likely firmware version check is done here. 

SEND 15   > [3.204733083333333] 0x00D2, payload=[32 78 88 CF 3E 63 56 19 75 3A 0A 2D F3 49 63 E2 | 2x..>cV.u:.-.Ic.], chk=0xA4
RESP 15   < [3.185595250000000] 0x0004, flags=80, payload=[ | ], chk=0x79, unk=0x05
RESP 15   < [3.189740333333333] 0x0004, flags=00, payload=[ | ], chk=0xF9, unk=0x05
RESP 15   < [3.200251666666666] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0x05
RESP 15   < [3.204733083333333] 0x0024, flags=00, payload=[D3 57 9B F2 A2 45 E2 7A 2A FC 84 12 97 8E 23 5F C8 AB FB 58 97 EC DE 20 94 0A 78 28 C6 EE C5 45 18 29 00 F4 56 22 53 AF 24 47 8E FF B1 5C DA 2F | .W...E.z*.....#_...X......x(...E.)..V"S.$G...\./], chk=0x4C, unk=0xFF

SEND 21   > [3.359112250000000] 0x00D2, payload=[1C 0B 9E FF FB 68 90 4B FD C2 05 CD D8 67 4D D0 | .....h.K.....gM.], chk=0x2D
RESP 21   < [3.321934500000000] 0x0000, flags=80, payload=[ | ], chk=0x7D, unk=0x00
RESP 21   < [3.354626666666667] 0x0020, flags=00, payload=[ | ], chk=0xDD, unk=0x00
RESP 21   < [3.359112250000000] 0x0020, flags=00, payload=[6C B4 26 F3 CD 32 D3 3E 6F 80 F2 0F 68 F7 E2 96 58 DB 2F BB AB A6 98 DD 26 14 DD 61 12 E4 55 BA BB 32 1D 1F 75 D5 D1 4C 7E 4A 19 42 E5 B0 C6 AB | l.&..2.>o...h...X./.....&..a..U..2..u..L~J.B....], chk=0x84, unk=0xFF

CMD 0x0090 - Scratch Pad Read

This command reads data from Ernie Scratch Pad. This is the inverse of command 0x91.

This is used for example to fetch the saved resume context buffer physical address. Kernel sets this before suspending and this value is passed to the resume function. See Suspend. The format is 2 byte offset and 1 byte length. 

SEND 16   > [3.221743166666667] 0x0090, payload=[0C 00 04 | ...], chk=0x5B
RESP 16   < [3.213273166666667] 0x0004, flags=80, payload=[ | ], chk=0x79, unk=0x57
RESP 16   < [3.217267333333333] 0x0024, flags=00, payload=[ | ], chk=0xD9, unk=0x57
RESP 16   < [3.221743166666667] 0x0024, flags=00, payload=[F0 0E 1F 41 | ...A], chk=0x77, unk=0x45

CMD 0x0091 - Scratch Pad Write

This command writes data to Ernie Scratch Pad. This is the inverse of command 0x90.

CMD 0x0800 - Get USB Info

See KBL Param. 

SEND 17   > [3.225828583333334] 0x0800, payload=[ | ], chk=0xF6
RESP 17   < [3.225828583333334] 0x0004, flags=00, payload=[40 00 | @.], chk=0xB7, unk=0x41

CMD 0x0100 - GetControlsInfo

See Boot Controls Info. 

SEND 18   > [3.226331500000000] 0x0100, payload=[ | ], chk=0xFD
RESP 18   < [3.226331500000000] 0x0004, flags=00, payload=[FF BF FF 74 | ...t], chk=0xC4, unk=0x45

CMD 0x0003 - GetSleepFactor

See Sleep Factor. 

SEND 19   > [3.226820750000000] 0x0003, payload=[ | ], chk=0xFB
RESP 19   < [3.226820750000000] 0x0004, flags=00, payload=[10 00 00 00 | ....], chk=0xE5, unk=0x45

CMD 0x0006 - Get Hardware flags

See Hardware flags. 

SEND 20   > [3.227328833333333] 0x0006, payload=[ | ], chk=0xF8
RESP 20   < [3.227328833333333] 0x0000, flags=3F, payload=[ | ], chk=0xBE, unk=0x00

CMD 0x088E

Unknown. Appears to be the last command sent before a time-jump (likely indicating completion of early-boot). Might be some status indicator to tell Syscon that we're done. 

SEND 22   > [3.386554833333333] 0x088E, payload=[02 29 | .)], chk=0x3B
RESP 22   < [3.367488416666667] 0x0000, flags=80, payload=[ | ], chk=0x7D, unk=0xB4
RESP 22   < [3.371567833333333] 0x0000, flags=00, payload=[ | ], chk=0xFD, unk=0xB4
RESP 22   < [3.382079833333334] 0x0020, flags=00, payload=[ | ], chk=0xDD, unk=0xB4
RESP 22   < [3.386554833333333] 0x0020, flags=00, payload=[ | ], chk=0xDD, unk=0xB4

CMD 0x0004

Unknown. Likely happens after initial boot. 

SEND 26   > [4.177113250000000] 0x0004, payload=[ | ], chk=0xFA
RESP 26   < [4.177113250000000] 0x0000, flags=00, payload=[10 00 00 00 | ....], chk=0xE9, unk=0x31

CMD 0x0103 - Get Multi Connector Info

Likely happens after initial boot. 

SEND 27   > [4.177586083333333] 0x0103, payload=[ | ], chk=0xFA
RESP 27   < [4.177586083333333] 0x0000, flags=00, payload=[00 FF 04 00 | ....], chk=0xF6, unk=0x31

Syscon Scratch Pad

Offset Size Name Comment Used by
0x0 8 unknown
0x8 4 Syscon power on time ex on DevKit: 0xA, 0x16, 0x1F, 0x24. ex on retail: 0x01BC0CD0, 0x05AC1AF7, 0x80000269 SceRtc#sceRtcSetCurrentTickForDriver
0xC 4 Resume context physical address Set on retail. Not set on DevKit. ex: 0x411F1EF0 second_loader
0x10 5 Current Tick Set on retail and DevKit. Stored in microseconds since 01/01/0001 divided by 2^19. SceRtc#sceRtcSetCurrentTickForDriver
0x15 3 padding
0x18 5 Current Secure Tick Set on retail. Not set on DevKit. SceRtc#sceRtcSetCurrentSecureTickForDriver
0x1D 5 Current Network Tick Always a bit earlier than Current Tick and Current Secure Tick. SceRtc#sceRtcSetCurrentNetworkTickForDriver
0x22 5 unknown Tick Set on DevKit. Not set on retail. ?Current Debug Secure Tick? SceRtc
0x27 5 unknown Tick ?Current Debug Secure Tick? SceRtc#SceRtcForDriver_A7236656
0x2C 5 Current Debug Network Tick SceRtc#sceRtcSetCurrentDebugNetworkTickForDriver
0x31 0x8F unknown Maybe reserved. Probably unused.
0xE0 0x20 CP DIP Switches Set on DevKit having a CP. Hence not set on Retail nor TestKit. ?secure_kernel? before system suspend, second_loader after system resume

Types

typedef struct SceSysconRtcTick { // size is 5 bytes
  uint8_t tick[5];
} SceSysconRtcTick;

typedef struct SceSysconScratchPad { // size is 0x100 bytes
  uint8_t unk_0[8];
  SceUInt32 powerOnTime;
  void *resumeContextPA;
  SceRtcSysconTick currentTick;
  uint8_t padding[3];
  SceSysconRtcTick currentSecureTick;
  SceSysconRtcTick currentNetworkTick;
  SceSysconRtcTick unk_22;
  SceSysconRtcTick unk_27;
  SceSysconRtcTick currentDebugNetworkTick;
  uint8_t reserved[0x8F];
  SceDIPSW dipsw;
} SceSysconScratchPad;

NVS

Not every NVS sector is directly readable from non-secure kernel: some sectors are part of SNVS (Secure NVS) which means they are XTS encrypted and must be accessed through a Secure handshake.

On FW 3.60, NVS size is 0xB60 bytes:

Offset Size Name Comment Used by
0 0x400 SNVS See Ernie Secure#SNVS.
0x400 0x80 Qaf Token second_loader
0x480 0x1 Qaf Token Flag 1 when Qaf Token is not set (FFed), 0 when Qaf Token is set second_loader
0x481 0x1 Extra UART Flag See KBL Param#Boot flags. second_loader
0x482 0x1 Unknown SceSblSsMgr#sceSblSsGetNvsDataForDriver, SceSblSsMgr#sceSblSsSetNvsDataForDriver
0x483 0x1 Safe Mode Flag See KBL Param#Boot flags. SceSblSsMgr#sceSblSsGetNvsDataForDriver, SceSblSsMgr#sceSblSsSetNvsDataForDriver, second_loader
0x484 0x1 Unknown
0x485 0x1 Unknown
0x486 0x1 Internal Storage Flag See KBL Param#Boot flags. Not present on FWs 0.931-0.990. Present on FW 3.60. SceSblSsMgr#sceSblSsGetNvsDataForDriver, SceSblSsMgr#sceSblSsSetNvsDataForDriver, second_loader
0x487 0x1 Unknown See KBL Param#Boot flags. second_loader
0x4A0 0x1 Update Mode See KBL Param#Boot flags. SceSblUpdateMgr#sceSblUsGetUpdateModeForUser, SceSblUpdateMgr#sceSblUsSetUpdateModeForUser
0x4A1 0x3 Unknown. Unused.
0x4A4 0x4 System Language SceRegistryMgr, SceSblSsMgr#sceSblSsGetNvsDataForDriver, SceSblSsMgr#sceSblSsSetNvsDataForDriver
0x4A8 0x1C Unknown. Unused.
0x4C4 0x1 Unknown. Set to 0 by default.
0x4C5 0x1B Unknown. Unused.
0x4E0 0x20 Unknown per device ASCII string of length 22 characters ?VisibleId? SceSblSsMgr#sceSblSsGetNvsDataForDriver, SceSblSsMgr#sceSblSsSetNvsDataForDriver
0x500 0x1 Wlan/Bt Flag SceSblSsMgr#sceSblSsGetNvsDataForDriver, SceSblSsMgr#sceSblSsSetNvsDataForDriver, SceWlanBt module_start
0x501 0x1F Unknown. Unused.
0x520 0x80 Activation Area first 0x20 bytes are SceNVSKitActivationData SceSblSsMgr, SceSblPostSsMgr
0x5A0 0x100 Qaf Token RSA signature Not present on FW 0.990. Present on FW 3.60. Maybe added on FW 1.80. second_loader
0x6A0 0xC0 Unknown. Unused.
0x760 0x400 Reserved for Test and Tool. Seems unused.

Types

typedef struct SceNVSKitActivationData { // size is 0x20 bytes
  char magic[4]; // "act\n"
  uint32_t issue_no;
  uint32_t end_date;
  uint32_t start_date;
  char cmac_hash[0x10];
} SceNVSKitActivationData;

Pinout

Ernie BGA package.

A candidate package for this chip is Renesas' P121F1-50-BAL-1. It has the same size and number of pins.

UART

Name Pin Description
CTS0 J7 UART0 clear to send
RTS0 C6 UART0 request to send
TX0 B6 UART0 transmit
RX0 F11 UART0 receive
SW0 A8 Switch, see UART Console#OLED PSVita UART0 location

SPI

Main communication with Kermit.

Name Pin Description
SS A7 Slave Select (often active low, output from master)
MISO A6 Master In Slave Out (data output from slave)
MOSI C7 Master Out Slave In (data output from master)
SCLK B7 Serial Clock (output from master)

Other

Name Pin Description
? C11 UDC pin 11
? F9 UDC pin 12
? G4 UDC pin 13
? G8 SN99057 pin 38
PWR_SW G6 Power switch through two transistor buffers

Versions

Hardware Versions

There are three hardware versions of Ernie:

  • NEC 78K0R/Kx3-L: present on early PS Vita prototypes (never seen)
  • NEC 78K0R/Kx3: present on Fat PS Vita and PS TV models, including some prototypes such as DEM-3000L
  • Renesas RL78/G13: present on Slim PS Vita models

NEC 78K0R/Kx3-L

Never seen yet but exists according to Ernie update packages.

NEC 78K0R/Kx3

NEC D79F0109 (78K0R/KH3, 121 pin)

Device Name : D79F0109

Other Device Name : SK0RT02N200GV120 (on DEM-3000L and PCH-1000)

Label: 

Model <- always D79F0109
Revision <- on DEM-3000H: ES1.0, blank on others
Build <- XXYYZZWWW <- XX: year, YY: week, ZZ: 2 letters (unknown usage), WWW: serial number
Manufacturing country <- always "MALAYSIA"

Renesas RL78/G13

Renesas R5F1ZCRK (RL78/G13, 121 pin) 

R5F1ZCRKABG#U0
R5    Renesas MCU
F      Flash
1      RL78
Z      Customer specific
C      Product group
R      121-pin
K      384KB
A      Consumer grade
BG    VFBGA 0.4mm
#U0  Tray*2

Device Name : R5F1ZCRK
Device Code : 10 00 06
Firmware Version : V3.03
Code Flash 1 (Address : 0x00000000,  Size : 384 K,  Erase Size : 1 K)
Data Flash 1 (Address : 0x000F1000,  Size : 8 K,  Erase Size : 1 K)

Label: 

(C) XXXX <- Year
Revision <- A0xxx SCEI
Build <- XXYYZZWWW <- XX: year, YY: week, ZZ: 2 letters (unknown usage), WWW: serial number
Unknown data

Block sizes

Ernie flash memory is erasable in blocks. Size of one block in bytes depends on the hardware version:

  • NEC 78K0R/Kx3-L: 0x800
  • NEC 78K0R/Kx3: 0x400
  • Renesas RL78/G13: 0x400

See also [1].

Software Versions

See also [2].

Ernie firmware can be partly updated and downgraded with software updates embedded in PUP.

Ernie firmware is dependant of the hardware version and detects it based on Hardware Info.

Examples

With DevKit connected, psp2ctrl info queries return the following results:

DEM-3000H running FW 0.990: 

SysConVersion: 591105

-> converted to hexadecimal: 0x00090501 -> 0.9.5.1

PDEL-1001 running FW 1.692: 

SCVersion: 0.9.2.4

PDEL-1001 running FW 3.600-3.680: 

SCVersion: 1.0.3.6

Downgrade

Syscon is downgradable on DEM/PDEL/PTEL/QAF units. It might also be downgraded on retail when using a downgrade enabler like modoru.

Firmware

See Ernie Firmware

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