UEFI BIOS T420 BIOS Structure - Versionsgeschichte

Jal2: /* Flash Access with flashrom */

2016-05-08T19:57:27Z

Flash Access with flashrom

← Nächstältere Version		Version vom 8. Mai 2016, 19:57 Uhr
Zeile 82:		Zeile 82:
	* Repeat the backup with another filename and compare the content of both files. If they don't match, do this a third time.		* Repeat the backup with another filename and compare the content of both files. If they don't match, do this a third time.
	'''flashrom -p linux_spi:dev=/dev/spidev0.0 -r t520_oldB.bin'''		'''flashrom -p linux_spi:dev=/dev/spidev0.0 -r t520_oldB.bin'''
	'''md5sum ~~old_bios~~*.bin'''
			'''md5sum t520_old*.bin'''

	* If you still get different files, re-check the cabling and re-connect the Ponoma chip to the flash chip.		* If you still get different files, re-check the cabling and re-connect the Ponoma chip to the flash chip.

Jal2: /* Connect a RaspberryPi to a T420/T520 */

2016-05-08T19:56:30Z

Connect a RaspberryPi to a T420/T520

@@ Zeile 48: / Zeile 48: @@
 in the T420/T520 all regions (IntelME, GbE, BIOS and descriptor table) reside in one 8MByte SPI Flash.
-If the SPI flash has WSON package, you must solder wires to either the pins or connector J100 (T520) / J27 (T420):
+If the SPI flash has WSON package, you must solder wires to either the pins of the IC or to the 2x5 connector J100 (T520) / J27 (T420):
 === Flash Access with flashrom ===

Jal2: /* Connect a RaspberryPi to a T420/T520 */

2016-05-08T19:52:34Z

Connect a RaspberryPi to a T420/T520

← Nächstältere Version		Version vom 8. Mai 2016, 19:52 Uhr
Zeile 47:		Zeile 47:
	This is similar to the [http://thinkwiki.de/UEFI_BIOS_Update_with_a_Raspberry_Pi#Attach_the_Raspberry_PI_to_the_SPI_Flash S430]. Only difference is, that		This is similar to the [http://thinkwiki.de/UEFI_BIOS_Update_with_a_Raspberry_Pi#Attach_the_Raspberry_PI_to_the_SPI_Flash S430]. Only difference is, that
	in the T420/T520 all regions (IntelME, GbE, BIOS and descriptor table) reside in one 8MByte SPI Flash.		in the T420/T520 all regions (IntelME, GbE, BIOS and descriptor table) reside in one 8MByte SPI Flash.

			If the SPI flash has WSON package, you must solder wires to either the pins or connector J100 (T520) / J27 (T420):

	=== Flash Access with flashrom ===		=== Flash Access with flashrom ===

Jal2 am 8. Mai 2016 um 19:47 Uhr

2016-05-08T19:47:48Z

← Nächstältere Version		Version vom 8. Mai 2016, 19:47 Uhr
Zeile 1:		Zeile 1:
	~~== T420 SPI Flash Structure ==~~

	~~It seems like~~ the T420 ~~BIOS update file (.FL1) is not an UEFI capsule as found for the [[UEFI_BIOS_Update_with_a_Raspberry_Pi\|Edge S430]]~~.		The procedure to update the BIOS was tested with both T420 und T520 and it will probably also be applicable with X220 and W520.

	~~This page describes work in progress.~~		== T420/T520 SPI Flash Structure ==

	=== Structure of a Dump of the T420 SPI Flash ===		It seems like the T420/T520 BIOS update file (.FL1) is not an UEFI capsule as found for the [[UEFI_BIOS_Update_with_a_Raspberry_Pi\|Edge S430]].

			=== Structure of a Dump of the T420/T520 SPI Flash ===

	This is the output of the UEFITool for a dump of a T420 SPI Flash:		This is the output of the UEFITool for a dump of a T420 SPI Flash:
Zeile 29:		Zeile 30:
	\|}		\|}


	~~The procedure below was tested with both T420 und T520 and it will probably also be applicable with X220 and W520.~~

	=== Structure of a .FL1 File ===		=== Structure of a .FL1 File ===

Jal2: /* Structure of a .FL1 File */

2016-05-08T19:45:15Z

Structure of a .FL1 File

← Nächstältere Version		Version vom 8. Mai 2016, 19:45 Uhr
Zeile 29:		Zeile 29:
	\|}		\|}


			The procedure below was tested with both T420 und T520 and it will probably also be applicable with X220 and W520.

	=== Structure of a .FL1 File ===		=== Structure of a .FL1 File ===
Zeile 40:		Zeile 42:
	GUIDs match the ones retrieved from the SPI flash.		GUIDs match the ones retrieved from the SPI flash.

	Therefore ~~the current assumption is that~~ we can update the BIOS in the T420 SPI flash by writing ~~these four volumes,~~ starting at flash offset ~~0x520000~~.		Therefore we can update the whole BIOS in the T420 SPI flash by writing 3MByte starting at flash offset 0x500000.
	~~We may have~~ to ~~erase~~ the ~~area between 0x500000~~ and ~~0x520000~~, as it ~~may contain UEFI variables~~ (~~which~~ may ~~lock the boot process)~~.
			=== Connect a RaspberryPi to a T420/T520 ===

			This is similar to the [http://thinkwiki.de/UEFI_BIOS_Update_with_a_Raspberry_Pi#Attach_the_Raspberry_PI_to_the_SPI_Flash S430]. Only difference is, that
			in the T420/T520 all regions (IntelME, GbE, BIOS and descriptor table) reside in one 8MByte SPI Flash.

			=== Flash Access with flashrom ===

			* Take the *.FL1 file from the official Lenovo BIOS Update, e.g. $01C9100.FL1, and truncate it to exactly 8MByte:
			'''dd if=\$01C9100.FL1 of=t520_spi.bin bs=$((0x800000)) count=1'''

			* Copy this file to the RaspberryPi, e.g. using scp.

			* Backup the old content. This may take some minutes:
			'''flashrom -p linux_spi:dev=/dev/spidev0.0 -r t520_old.bin'''

	~~Extract~~ the ~~BIOS part from an .FL1 file including~~ the ~~padding at the beginning~~:		* You may need to tell the tool which flash IC it is with the "-c" option:
			'''flashrom -p linux_spi:dev=/dev/spidev0.0 -c MX25L6405 -r t520_old.bin'''

	'''~~dd if~~=*~~.FL1 of=bios~~.bin ~~bs=1 count=$((0x300000)) skip=$((0x500000))~~'''		* Repeat the backup with another filename and compare the content of both files. If they don't match, do this a third time.
			'''flashrom -p linux_spi:dev=/dev/spidev0.0 -r t520_oldB.bin'''
			'''md5sum old_bios*.bin'''

	and ~~without~~ the ~~padding:~~		* If you still get different files, re-check the cabling and re-connect the Ponoma chip to the flash chip.

	'''~~dd if=*.FL1 of=~~bios.~~bin bs=1 count=$((0x2e0000)) skip=$((0x520000))~~'''		* As we want to write only the BIOS part in the SPI flash starting at offset 0x500000, we need a layout file:
			'''echo -e "000000:4fffff dummy\n500000:7fffff bios" > t520.layout'''

	~~The first file must be flashed at offset 0x500000,~~ the ~~second one at 0x520000~~.		* Update the BIOS portion in the SPI flash:
			'''flashrom -p linux_spi:dev=/dev/spidev0.0 --layout t520.layout -i bios -w t520_spi.bin'''

	[[Category:BIOS]]		[[Category:BIOS]]

Jal2: /* T420 SPI Flash Structure */

2015-11-06T22:39:21Z

T420 SPI Flash Structure

← Nächstältere Version		Version vom 6. November 2015, 22:39 Uhr
Zeile 24:		Zeile 24:
	\|0x1000 \|\| 0x2000 \|\| GbE region		\|0x1000 \|\| 0x2000 \|\| GbE region
	\|-		\|-
	\|0x3000 \|\| ~~0x4d0000~~ \|\| Intel ME region		\|0x3000 \|\| 0x4fd000 \|\| Intel ME region
	\|-		\|-
	\|0x500000 \|\| 0x300000 \|\| BIOS region		\|0x500000 \|\| 0x300000 \|\| BIOS region

Jal2 am 6. November 2015 um 22:34 Uhr

2015-11-06T22:34:14Z

← Nächstältere Version		Version vom 6. November 2015, 22:34 Uhr
Zeile 53:		Zeile 53:
	The first file must be flashed at offset 0x500000, the second one at 0x520000.		The first file must be flashed at offset 0x500000, the second one at 0x520000.

	[[Category::BIOS]]		[[Category:BIOS]]

Jal2 am 6. November 2015 um 22:33 Uhr

2015-11-06T22:33:28Z

← Nächstältere Version		Version vom 6. November 2015, 22:33 Uhr
Zeile 52:		Zeile 52:

	The first file must be flashed at offset 0x500000, the second one at 0x520000.		The first file must be flashed at offset 0x500000, the second one at 0x520000.

			[[Category::BIOS]]

Jal2 am 6. November 2015 um 22:32 Uhr

2015-11-06T22:32:52Z

@@ Zeile 16: / Zeile 16: @@
 The SPI flash of the T420 has a size of 8MByte with this structure:
 {| class="wikitable"
 |-
@@ Zeile 28: / Zeile 27: @@
 |-
 |0x500000    || 0x300000        || BIOS region
-|-
+|}

Jal2: /* Structure of a Dump of the T420 SPI Flash */

2015-11-06T22:09:10Z

Structure of a Dump of the T420 SPI Flash

← Nächstältere Version		Version vom 6. November 2015, 22:09 Uhr
Zeile 6:		Zeile 6:

	=== Structure of a Dump of the T420 SPI Flash ===		=== Structure of a Dump of the T420 SPI Flash ===

			This is the output of the UEFITool for a dump of a T420 SPI Flash:


			[[File:UEFITool_t420_bios_dump.png \| xxx \| 300px]]

			[[File:UEFITool_t420_bios_dump2.png \| xxx \| 300px]]


	The SPI flash of the T420 has a size of 8MByte with this structure:		The SPI flash of the T420 has a size of 8MByte with this structure:
	{\| ~~border~~="1"
	~~!offset~~		{\| class="wikitable"
	~~!length~~
	~~!content~~
	\|-
	~~\|0x0~~
	~~\|0x1000~~
	~~\|descriptor region~~
	\|-		\|-
	~~\|0x1000~~		! Offset !! Length !! Description
	~~\|0x2000~~
	~~\|GbE region~~
	\|-		\|-
	\|~~0x3000~~		\|0x0 \|\| 0x1000 \|\| descriptor region
	\|~~0x4d0000~~
	\| ~~Intel ME~~ region
	\|-		\|-
	\|0x500000		\|0x1000 \|\| 0x2000 \|\| GbE region
	\|0x300000		\|-
	\|BIOS region		\|0x3000 \|\| 0x4d0000 \|\| Intel ME region
			\|-
			\|0x500000 \|\| 0x300000 \|\| BIOS region
	\|-		\|-