Talk:SC EEPROM

Memory test diagnosis NVS flag

There is a NVS flag which enables a special diagnostic mode at startup. This flag is enabled on Proto/DECR. It allows memtest diagnose.

Pseudo-code:

def check_bootrom_diag_mode(mode, param)
        diag_mode = get_eeprom_bootrom_diag()
        if diag_mode & 0x1:
                if diag_mode & 0x100:
                        return 0
                mode = (diag_mode >> 3) & 0x1
                param = (diag_mode >> 3) & 0x1
        else:
                mode = (diag_mode >> 1) & 0x1
                param = -1
        return 1

EEPROM Dumps

• https://mega.co.nz/#!Bk1ESBZT!pqAB6riHhZSCPAftvjm2MFf3j0It61huT3WT2AbWS-A -> DEAD LINK

EEPROM Strings (CP memory dump, DECR)

http://pastie.org/private/usd2zi8mw3igycsh1a395q -> DEAD LINK

Bus Pirate stuff

http://i.imgur.com/48rbR51.png

(needs more wikifying)

On standby

• Note: during this time the plaintext EEPROM is never read even once!
• Additionally, the areas 0x26B0, 0x26D0 are not read

• Checks status
• Unlocks Write Command
• Reads PATCH top half region
• Reads PATCH bottom half region
• Reads 0x2790?(0x20)
• Reads 0x27B0?(0x10)
• Reads 0x26D0 (0x10)
• Reads some configs? (around >0x31XX area)
• Reads 0x0 (0x10)
• Reads some configs?
• Reads 0x10(0x280) (EID1)?
• Reads 0x3A00 (0x1)
• Reads 0x290 (0x10) (EID1 CMAC?)
• Reads 0x2A0 (0x20)
• Reads 0x2C0 (0x20)
• Reads 0x2E0 (0x20)
• Writes some stuff to 0x2C0/0x2E0/0x2A0 (mostly ff's)
• ReReads EID1 and CMAC
• Reads 0x360
• Reads 0x370
• Writes (again) mostly ff's to 0x360 and 0x370
• ReReads EID1 and CMAC
• Does same process with 0x460 and 0x470
• Reads 0x2710 and 0x2730 (0x20,0x10) ???
• Reads 0x2700 (0x10)
• fini!

MemoryMap Syscon BB Chip

0x1000-0x1FFF:PTCH Region (patch written here)

Nice read about Syscon EEPROM

http://rmscrypt.wordpress.com/2011/02/01/lets-look-at-syscon/

Experimental table

The goal is to join together all the "memory map" info in a single table

Round 2

Area			SPI / UART				Syscall 863						Data Name	Notes
Name	Size	csum	Mullion		Sherwood	whitelist	Block ID NVS Region	whitelist			Offset	Size
			CXR713	CXR714	SW/2/3(emu)	EEP		DM	UM	SCM
System Info	0x200	No	0x2600	0x2600	?	?	?	?	?	?	?	0x200		Encrypted data at relative offset 0xB0
Patch 1	0x400	No	0x2800	0x2800	0x2000 ?	Exploit	N/A	No	No	No	0x02800	0x400	Syscon Firmware Patch (top half)	Encrypted data
-	0x300	No	0x2C00	0x2C00	N/A ?	Yes ?	N/A	No	No	No	0x02C00	0x300	empty	Region not used
Industry Area	0x100	No	0x2F00	0x2F00	0xE00	Yes	0x10	Patch	Yes	Yes	0x02F00
Customer Service Area	0x100	No	0x3000	0x3000	0xF00	Yes	0x20	?	?	?	?	0x100
Platform Config	0x100	Yes	0x3100	0x3100	?	Yes	?	?	?	?	?	0x100
Hardware Config	0x100	Yes	0x3200	0x3200	?	Yes	?	?	?	?	?	0x100
Thermal Config	0x200	Yes	0x3300	0x3300	0x250	Yes	?	?	?	?	?	0x200	Data table using this C structure	See: Syscon Thermal Config
On/Off Count/Time	0x200	No	0x3500	0x3500	?	Yes	?	?	?	?	?	0x200	Data table
Error Log	0x100	No	0x3700	0x3700	0x900	Yes	?	?	?	?	?	0x100	Data table	See: Syscon Error Codes
-	0x100	No	0x3800	0x3800	N/A ?	Yes ?	N/A	No	No	No	?	0x100	empty	Region not used
Board Config	0x100	Yes	0x3900	0x3900	?	Yes	?	?	?	?	?	0x100
HDMI/DVE Config	0x100	No	0x3A00	0x3A00	?	Yes	?	?	?	?	?	0x100
-	0x100	No	0x3B00	0x3B00	N/A ?	Yes ?	N/A	No	No	No	?	0x100	empty	Region not used
-	0x200	Yes	0x3C00	0x3C00	N/A ?	Yes ?	N/A	No	No	No	?	0x200	empty	Region not used
-	0x200	Yes	0x3E00	0x3E00	N/A ?	Yes ?	N/A	No	No	No	?	0x200	empty	Region not used
-	0x400	No	0x4000	0x7000	N/A ?	Yes ?	N/A	No	No	No	?	0x400	empty	Region not used
-	0xB00	No	0x4400	0x7400	N/A ?	Yes ?	N/A	No	No	No	?	0xB00	empty	Region not used
-	0x2000	No	0x5000	0x5000	N/A ?	Yes ?	N/A	No	No	No	?	0x2000	empty	Region not used
System Software Config	0x100	No	0x7000	0x4000	0x1000	Yes	0x0	?	?	?	?	0x100
System Software Config	0x100	No	0x7100	0x4100	0x1100	Yes	0x1	?	?	?	?	0x100
System Software Config a.k.a. Flags and Tokens	0x100	No	0x7200	0x4200	0x1200	Yes	0x2	Patch	Yes	Yes	0x48C00
System Software Config	0x100	No	0x7300	0x4300	0x1300	Yes	0x3	?	?	?	?	0x100
Patch 2	0xC00	No	0x7400	0x4400	0x2400 ?	Exploit	N/A	No	No	No	?	?	Syscon Firmware Patch (bottom half)	Encrypted data