Talk:SC EEPROM

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Revision as of 05:42, 10 January 2022 by Sandungas (talk | contribs) (Experimental table)
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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

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 Wikitable builder Notes (temporal)
Name Size csum Mullion Sherwood whitelist Block ID
NVS Region
whitelist Offset Size
CXR713 CXR714 SW/2/3(emu) EEP lv1/DM UM SCM
Authenticated Data 0x2560 No 0x0000 0x0000 ?  Exploit*  No  Patch*   Patch*   Patch*  ? Data table (0x160+(0x9*0x400)) ?
? 0x150 No 0x2560 0x2560 ?  Exploit*  No  Patch*   Patch*   Patch*  ? Filled with FF's ?
System Info 0x150 No 0x26B0 0x26B0 0x0000~ ?  Exploit*  No  Patch*   Patch*   Patch*  ? This wikitable row needs to be splitted up to 5+ rows
Patch 1 0x400 No 0x2800 0x2800 0x2000(flash)  Exploit*  No  Patch*   Patch*   Patch*  ? 0x400 Syscon Firmware Patch (top half)
- 0x300 No 0x2C00 0x2C00 0x0B00 Yes/UART No  Patch*   Patch*   Patch*  ? 0x300 not used Filled with FF's
Industry Area 0x100 No 0x2F00 0x2F00 0x0E00 Yes/UART 0x10  Patch*  Yes Yes 0x02F00 This wikitable row needs to be splitted up to 20+ rows
Customer Service Area 0x100 No 0x3000 0x3000 0x0F00 Yes/UART 0x20  Patch*  Yes Yes 0x03000 0x100 Filled with FF's ?
Platform Config 0x100 Yes 0x3100 0x3100 0x00000 ? Yes/UART No  Patch*   Patch*   Patch*  ? 0x100 This wikitable row needs to be splitted up to 5+ rows
Hardware Config 0x100 Yes 0x3200 0x3200 0x0000~ ? Yes/UART No  Patch*   Patch*   Patch*  ? 0x100 This wikitable row needs to be splitted up to 40+ rows
Thermal Config 0x200 Yes 0x3300 0x3300 0x0250 Yes/UART No  Patch*   Patch*   Patch*  ? 0x200 Data table. See: Syscon Thermal Config
On/Off Count/Time 0x200 No 0x3500 0x3500 0x0800~ ? Yes/UART No  Patch*   Patch*   Patch*  ? 0x200 Data table
Error Log 0x100 No 0x3700 0x3700 0x0900 Yes/UART No  Patch*   Patch*   Patch*  ? 0x100 Data table. See: Syscon Error Codes
- 0x100 No 0x3800 0x3800 N/A ? Yes/UART No  Patch*   Patch*   Patch*  ? 0x100 not used Filled with FF's
Board Config/Debug 0x100 Yes 0x3900 0x3900 0x0000~ ? Yes/UART No  Patch*   Patch*   Patch*  ? 0x100 This wikitable row needs to be splitted up to 15+ rows
HDMI/DVE Config 0x100 No 0x3A00 0x3A00 0x0A00 Yes/UART No  Patch*   Patch*   Patch*  ? 0x100 This wikitable row needs to be splitted up to 5+ rows
- 0x100 No 0x3B00 0x3B00 N/A ? Yes/UART No  Patch*   Patch*   Patch*  ? 0x100 not used Filled with FF's
Config Ring 0x200 Yes 0x3C00 0x3C00 N/A ? Yes/UART No  Patch*   Patch*   Patch*  ? 0x200 not used Filled with FF's
Debug 2 0x200 Yes 0x3E00 0x3E00 N/A ? Yes/UART No  Patch*   Patch*   Patch*  ? 0x200 not used Filled with FF's
- 0x3000 No 0x4000 N/A N/A Yes/UART No  Patch*   Patch*   Patch*  ? 0x3000 reserved Filled with FF's
System Config ? 0x100 No 0x7000 0x4000 0x1000 Yes/UART 0x0  Patch*   Patch*  Yes 0x48000 0x100 Filled with FF's ?
Hypervisor Config ? 0x100 No 0x7100 0x4100 0x1100 Yes/UART 0x1  Patch*   Patch*  Yes 0x48800 Data table (0x10+(0x6*0x28)) Header + Data table ?
Flags and Tokens 0x100 No 0x7200 0x4200 0x1200 Yes/UART 0x2  Patch*  Yes
or
Patch*
Yes 0x48C00 This wikitable row needs to be splitted up to 50+ rows
System Data ? 0x100 No 0x7300 0x4300 0x1300 Yes/UART 0x3  Patch*   Patch*  Yes 0x48D00 0x100 Filled with FF's ?
Patch 2 0xC00 No 0x7400 0x4400 0x2000(flash)  Exploit*  No  Patch*   Patch*   Patch*  ? 0xC00 Syscon Firmware Patch (bottom half)