Documentation: Add basic flashing tutorial for Lenovo
* Add basic flashing tutorial ** Describe internal and external flashing ** Describe flash supply diode protection ** Gives general advices on flashing ** Describe how to use flashrom --ifd * Describe basic flashing on Lenovo T4xx devices ** Describe how to disassemble and access the flash IC on T4xx ** Describe flash layout on Sandy Bridge and Ivy Bridge series. Change-Id: Ia833e27f4e7d89ee32be9bed21a0c021839facec Signed-off-by: Patrick Rudolph <siro@das-labor.org> Reviewed-on: https://review.coreboot.org/27852 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
This commit is contained in:
Patrick Rudolph
Philipp Deppenwiese
parent
3d1d966dd8
commit
15d8405584
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# Flashing firmware externally supplying direct power
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**WARNING:** Never use a high current rated power supply, like PC ATX power
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supply. It'll literally melt your PCB traces on short circuit.
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On some mainboards the flash IC Vcc pin is connected to a diode, which prevents
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powering the rest of the board.
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![][flash_ic_diode]
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Please have a look at the mainboard specific documentation for details.
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On those boards it's safe to use a programmer and supply power externally.
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**WARNING:** Verify that you apply the correct voltage!
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## USB programmer
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USB programmers are usually current limited by the host USB hub. On USB 2.0
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ports the limit is 500mA, which is sufficient to power the flash. Those are
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the best choice as they are stateless and have a fast power on reset cycle.
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## Single board computers (like BeagleBone Black / RPi)
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Be careful when connecting a flash chip, especially when using a Pomona
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test-clip. A short circuit or overcurrent (250mA) causes a brown-out reset,
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resulting in a reboot of the running operating system (and possible loss of
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remote shell).
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[flash_ic_diode]: flash_ic_diode.svg
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# Flashing firmware standalone
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If none of the other methods work, there are three possibilities:
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## Desolder
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You must remove or desolder the flash IC before you can flash it.
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It's recommended to solder a socket in place of the flash IC.
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When flashing the IC, always connect all input pins.
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If in doubt, pull /WP, /HOLD, /RESET and alike up towards Vcc.
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## SPI flash emulator
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If you are a developer, you might want to use an [EM100Pro] instead, which sets
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the onboard flash on hold, and allows to run custom firmware.
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It provides a very fast development cycle without actually writing to flash.
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## SPI flash overwrite
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It is possible to set the onboard flash on hold and use another flash chip.
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Connect all lines one-to-one, except /HOLD. Pull /HOLD of the soldered flash IC
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low, and /HOLD of your replacement flash IC high.
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[EM100Pro]: https://www.dediprog.com/product/EM100Pro
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<tspan x="345.752" y="463.247">HOLD</tspan>
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</text>
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<tspan x="349.752" y="468.247">CLK</tspan>
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</text>
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<text font-size="4.51549" style="fill: #000000;text-anchor:start;font-family:sans-serif;font-style:normal;font-weight:normal" x="353.502" y="472.997">
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<tspan x="353.502" y="472.997">DI</tspan>
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</text>
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<tspan x="323.752" y="458.372">CS</tspan>
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</text>
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<text font-size="4.51549" style="fill: #000000;text-anchor:start;font-family:sans-serif;font-style:normal;font-weight:normal" x="324.127" y="468.497">
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<tspan x="324.127" y="468.497">WP</tspan>
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</text>
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<text font-size="4.51549" style="fill: #000000;text-anchor:start;font-family:sans-serif;font-style:normal;font-weight:normal" x="323.752" y="472.997">
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<tspan x="323.752" y="472.997">GND</tspan>
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</text>
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<tspan x="324.127" y="463.497">DO</tspan>
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After Width: | Height: | Size: 5.0 KiB |
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@ -0,0 +1,55 @@
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<tspan x="348.75" y="457.91">VCC</tspan>
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</text>
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<tspan x="345.752" y="463.246">HOLD</tspan>
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</text>
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<tspan x="349.752" y="468.246">CLK</tspan>
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</text>
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<text font-size="4.51556" style="fill: #000000;text-anchor:start;font-family:sans-serif;font-style:normal;font-weight:normal" x="353.502" y="472.996">
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<tspan x="353.502" y="472.996">DI</tspan>
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<tspan x="323.752" y="458.372">CS</tspan>
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<tspan x="324.128" y="468.496">WP</tspan>
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</text>
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<tspan x="323.752" y="472.996">GND</tspan>
|
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</text>
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<tspan x="324.128" y="463.496">DO</tspan>
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|
After Width: | Height: | Size: 4.5 KiB |
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# Flashing firmware tutorial
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Updating the firmware is possible using the **internal method**, where the updates
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happen from a running system, or using the **external method**, where the system
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is in a shut down state and an external programmer is attached to write into the
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flash IC.
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## Contents
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* [Flashing internaly](int_flashrom.md)
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* [Flashing firmware standalone](ext_standalone.md)
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* [Flashing firmware externally supplying direct power](ext_power.md)
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* [Flashing firmware externally without supplying direct power](no_ext_power.md)
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## General advice
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* It's recommended to only flash the BIOS region.
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* Always verify the firmware image.
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* If you flash externally and have transmission errors:
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* Use short wires
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* Reduce clock frequency
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* Check power supply
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* Make sure that there are no other bus masters (EC, ME, SoC, ...)
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## Internal method
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This method using [flashrom] is available on many platforms, as long as they
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aren't locked down.
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There are various protection schemes that make it impossible to modify or
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replace a firmware from a running system. coreboot allows to disable these
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mechanisms, making it possible to overwrite (or update) the firmware from a
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running system.
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Usually you must use the **external method** once to install a retrofitted
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coreboot and then you can use the **internal method** for future updates.
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There are multiple ways to update the firmware:
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* Using flashrom's *internal* programmer to directly write into the firmware
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flash IC, running on the target machine itself
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* A proprietary software to update the firmware, running on the target machine
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itself
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* A UEFI firmware update capsule
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More details on flashrom's
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* [internal programmer](int_flashrom.md)
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## External method
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External flashing is possible on many platforms, but requires disassembling
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the target hardware. You need to buy a flash programmer, that
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exposes the same interface as your flash IC (likely SPI).
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Please also have a look at the mainboard-specific documentation for details.
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After exposing the firmware flash IC, read the schematics and use one of the
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possible methods:
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* [Flashing firmware standalone](ext_standalone.md)
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* [Flashing firmware externally supplying direct power](ext_power.md)
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* [Flashing firmware externally without supplying direct power](no_ext_power.md)
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||||
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**WARNING:** Using the wrong method or accidentally using the wrong pinout might
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||||
permanently damage your hardware!
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## Using a layout file
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On platforms where the flash IC is shared with other components you might want
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to write only a part of the flash IC. On Intel for example there are IFD, ME and
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GBE which don't need to be updated to install coreboot.
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To make [flashrom] only write the *bios* region, leaving Intel ME and Intel IFD
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||||
untouched, you can use a layout file, which can be created using ifdtool
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```bash
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ifdtool -f rom.layout coreboot.rom
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```
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and looks similar to:
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```
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00000000:00000fff fd
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00500000:00bfffff bios
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00003000:004fffff me
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00001000:00002fff gbe
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```
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By specifying *-l* and *-i* [flashrom] writes a single region:
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```bash
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flashrom -l rom.layout -i bios -w coreboot.rom -p <programmer>
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```
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||||
## Using an IFD to determine the layout
|
||||
flashrom version 1.0 supports reading the layout from the IFD (first 4KiB of
|
||||
the ROM). You don't need to manually specify a layout it, but it only works
|
||||
under the following conditions:
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||||
|
||||
* Only available on Intel ICH7+
|
||||
* There's only one flash IC when flashing externally
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```bash
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flashrom --ifd -i bios -w coreboot.rom -p <programmer>
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```
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**TODO** explain FMAP regions, normal/fallback mechanism, flash lock mechanisms
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[flashrom]: https://www.flashrom.org/Flashrom
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@ -0,0 +1,19 @@
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# Flashing firmware internally
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||||
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**WARNING:** If you flash a broken firmware and have no recovery mechanism, you
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must use the **external method** to flash a working firmware again.
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||||
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## Using flashrom
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||||
This method does only work on Linux, if it isn't locked down.
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You may also need to boot with 'iomem=relaxed' in the kernel command
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line if CONFIG_IO_STRICT_DEVMEM is set.
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For more details please also check [flashrom's wiki].
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Use the programmer *internal* to flash *coreboot.rom* internally:
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```bash
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flashrom -p internal -w coreboot.rom
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||||
```
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||||
|
||||
[flashrom's wiki]: https://www.flashrom.org/Flashrom
|
||||
|
|
@ -0,0 +1,22 @@
|
|||
# Flashing firmware externally supplying no power
|
||||
|
||||
On some mainboards the flash IC's Vcc pin is connected to the internal
|
||||
power-rail, powering the entire board if the flash IC is powered externally.
|
||||
Likely it powers other chips which access the flash IC, preventing the external
|
||||
programmer from reading/writing the chip. It also violates the components'
|
||||
power sequence, bringing the ICs into an undefined state.
|
||||
|
||||
![][flash_ic_no_diode]
|
||||
|
||||
Please have a look at the mainboard specific documentation for details.
|
||||
|
||||
On those boards it's recommended to use a programmer without supplying power
|
||||
externally.
|
||||
|
||||
The key to read and write the flash IC is to put the machine into *S3* sleep-
|
||||
state or *S5* sleep-state *maybe* with Wake-On-LAN enabled.
|
||||
Another option that sometimes works is to keep the device in reset. This method requires
|
||||
knowledge of the board schematics and might require hardware modifications.
|
||||
Use a multimeter to make sure the flash IC is powered in those sleep states.
|
||||
|
||||
[flash_ic_no_diode]: flash_ic_no_diode.svg
|
||||
|
|
@ -23,3 +23,4 @@ Contents:
|
|||
* [Vendorcode-specific documentation](vendorcode/index.md)
|
||||
* [Utilities](util.md)
|
||||
* [Release notes for past releases](releases/index.md)
|
||||
* [Flashing firmware tutorial](flash_tutorial/index.md)
|
||||
|
|
|
|||
|
|
@ -26,6 +26,20 @@ This section contains documentation about coreboot on specific mainboards.
|
|||
|
||||
- [Compaq 8200 Elite SFF](hp/compaq_8200_sff.md)
|
||||
|
||||
## Lenovo
|
||||
|
||||
- [T4xx common](lenovo/t4xx_series.md)
|
||||
|
||||
### Sandy Bridge series
|
||||
|
||||
- [T420](lenovo/t420.md)
|
||||
- [T420 / T520 / X220 / T420s / W520 common](lenovo/xx20_series.md)
|
||||
|
||||
### Ivy Bridge series
|
||||
|
||||
- [T430](lenovo/t430.md)
|
||||
- [T430 / T530 / X230 / W530 common](lenovo/xx30_series.md)
|
||||
|
||||
## SiFive
|
||||
|
||||
- [SiFive HiFive Unleashed](sifive/hifive-unleashed.md)
|
||||
|
|
|
|||
|
|
@ -0,0 +1,52 @@
|
|||
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
|
||||
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "http://www.w3.org/TR/2001/PR-SVG-20010719/DTD/svg10.dtd">
|
||||
<svg width="10cm" height="8cm" viewBox="265 -156 186 159" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
|
||||
<g>
|
||||
<rect style="fill: #ffffff" x="307.888" y="-152.131" width="49.1438" height="30.4667"/>
|
||||
<rect style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" x="307.888" y="-152.131" width="49.1438" height="30.4667"/>
|
||||
<text font-size="6.77333" style="fill: #000000;text-anchor:middle;font-family:sans-serif;font-style:normal;font-weight:normal" x="332.46" y="-134.831">
|
||||
<tspan x="332.46" y="-134.831">IFD</tspan>
|
||||
</text>
|
||||
</g>
|
||||
<g>
|
||||
<rect style="fill: #ffffff" x="308" y="-91.1844" width="49.1438" height="59.7756"/>
|
||||
<rect style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" x="308" y="-91.1844" width="49.1438" height="59.7756"/>
|
||||
<text font-size="6.77333" style="fill: #000000;text-anchor:middle;font-family:sans-serif;font-style:normal;font-weight:normal" x="332.572" y="-59.2299">
|
||||
<tspan x="332.572" y="-59.2299">ME</tspan>
|
||||
</text>
|
||||
</g>
|
||||
<g>
|
||||
<rect style="fill: #ffffff" x="307.934" y="-31.6442" width="49.1438" height="30.8828"/>
|
||||
<rect style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" x="307.934" y="-31.6442" width="49.1438" height="30.8828"/>
|
||||
<text font-size="6.77333" style="fill: #000000;text-anchor:middle;font-family:sans-serif;font-style:normal;font-weight:normal" x="332.506" y="-14.1361">
|
||||
<tspan x="332.506" y="-14.1361">BIOS</tspan>
|
||||
</text>
|
||||
</g>
|
||||
<g>
|
||||
<rect style="fill: #ffffff" x="308" y="-121.59" width="49.1438" height="30.4667"/>
|
||||
<rect style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" x="308" y="-121.59" width="49.1438" height="30.4667"/>
|
||||
<text font-size="6.77333" style="fill: #000000;text-anchor:middle;font-family:sans-serif;font-style:normal;font-weight:normal" x="332.572" y="-104.29">
|
||||
<tspan x="332.572" y="-104.29">GBE</tspan>
|
||||
</text>
|
||||
</g>
|
||||
<text font-size="6.77333" style="fill: #000000;text-anchor:start;font-family:sans-serif;font-style:normal;font-weight:normal" x="265.968" y="-149.208">
|
||||
<tspan x="265.968" y="-149.208">0x000000</tspan>
|
||||
</text>
|
||||
<text font-size="6.77333" style="fill: #000000;text-anchor:start;font-family:sans-serif;font-style:normal;font-weight:normal" x="266.362" y="-120.102">
|
||||
<tspan x="266.362" y="-120.102">0x001000</tspan>
|
||||
</text>
|
||||
<text font-size="6.77333" style="fill: #000000;text-anchor:start;font-family:sans-serif;font-style:normal;font-weight:normal" x="266.162" y="-88.8972">
|
||||
<tspan x="266.162" y="-88.8972">0x003000</tspan>
|
||||
</text>
|
||||
<text font-size="6.77333" style="fill: #000000;text-anchor:start;font-family:sans-serif;font-style:normal;font-weight:normal" x="266.144" y="-29.6656">
|
||||
<tspan x="266.144" y="-29.6656">0x500000</tspan>
|
||||
</text>
|
||||
<text font-size="6.77333" style="fill: #000000;text-anchor:start;font-family:sans-serif;font-style:normal;font-weight:normal" x="266.326" y="1.87412">
|
||||
<tspan x="266.326" y="1.87412">0x800000</tspan>
|
||||
</text>
|
||||
<path style="fill: none; fill-opacity:0; stroke-width: 1; stroke: #000000" d="M 380.877 -151.013 C 401.876,-151.013 379.377,-73.513 400.627,-72.513"/>
|
||||
<path style="fill: none; fill-opacity:0; stroke-width: 1; stroke: #000000" d="M 381.377 -0.763268 C 395.238,-0.763268 387.016,-72.763 400.877,-72.763"/>
|
||||
<text font-size="10.1598" style="fill: #000000;text-anchor:start;font-family:sans-serif;font-style:normal;font-weight:normal" x="406.127" y="-68.513">
|
||||
<tspan x="406.127" y="-68.513">Flash #0</tspan>
|
||||
</text>
|
||||
</svg>
|
||||
|
After Width: | Height: | Size: 3.7 KiB |
|
|
@ -0,0 +1,61 @@
|
|||
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
|
||||
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.0//EN" "http://www.w3.org/TR/2001/PR-SVG-20010719/DTD/svg10.dtd">
|
||||
<svg width="10cm" height="11cm" viewBox="265 -156 187 213" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
|
||||
<g>
|
||||
<rect style="fill: #ffffff" x="307.888" y="-152.131" width="49.1438" height="30.4667"/>
|
||||
<rect style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" x="307.888" y="-152.131" width="49.1438" height="30.4667"/>
|
||||
<text font-size="6.77333" style="fill: #000000;text-anchor:middle;font-family:sans-serif;font-style:normal;font-weight:normal" x="332.46" y="-134.831">
|
||||
<tspan x="332.46" y="-134.831">IFD</tspan>
|
||||
</text>
|
||||
</g>
|
||||
<g>
|
||||
<rect style="fill: #ffffff" x="308" y="-91.1844" width="49.1438" height="59.7756"/>
|
||||
<rect style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" x="308" y="-91.1844" width="49.1438" height="59.7756"/>
|
||||
<text font-size="6.77333" style="fill: #000000;text-anchor:middle;font-family:sans-serif;font-style:normal;font-weight:normal" x="332.572" y="-59.2299">
|
||||
<tspan x="332.572" y="-59.2299">ME</tspan>
|
||||
</text>
|
||||
</g>
|
||||
<g>
|
||||
<rect style="fill: #ffffff" x="307.934" y="-31.6442" width="49.1438" height="85.7161"/>
|
||||
<rect style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" x="307.934" y="-31.6442" width="49.1438" height="85.7161"/>
|
||||
<text font-size="6.77333" style="fill: #000000;text-anchor:middle;font-family:sans-serif;font-style:normal;font-weight:normal" x="332.506" y="13.2805">
|
||||
<tspan x="332.506" y="13.2805">BIOS</tspan>
|
||||
</text>
|
||||
</g>
|
||||
<g>
|
||||
<rect style="fill: #ffffff" x="308" y="-121.59" width="49.1438" height="30.4667"/>
|
||||
<rect style="fill: none; fill-opacity:0; stroke-width: 2; stroke: #000000" x="308" y="-121.59" width="49.1438" height="30.4667"/>
|
||||
<text font-size="6.77333" style="fill: #000000;text-anchor:middle;font-family:sans-serif;font-style:normal;font-weight:normal" x="332.572" y="-104.29">
|
||||
<tspan x="332.572" y="-104.29">GBE</tspan>
|
||||
</text>
|
||||
</g>
|
||||
<text font-size="6.77333" style="fill: #000000;text-anchor:start;font-family:sans-serif;font-style:normal;font-weight:normal" x="265.968" y="-149.208">
|
||||
<tspan x="265.968" y="-149.208">0x000000</tspan>
|
||||
</text>
|
||||
<text font-size="6.77333" style="fill: #000000;text-anchor:start;font-family:sans-serif;font-style:normal;font-weight:normal" x="266.362" y="-120.102">
|
||||
<tspan x="266.362" y="-120.102">0x001000</tspan>
|
||||
</text>
|
||||
<text font-size="6.77333" style="fill: #000000;text-anchor:start;font-family:sans-serif;font-style:normal;font-weight:normal" x="266.162" y="-88.8972">
|
||||
<tspan x="266.162" y="-88.8972">0x003000</tspan>
|
||||
</text>
|
||||
<text font-size="6.77333" style="fill: #000000;text-anchor:start;font-family:sans-serif;font-style:normal;font-weight:normal" x="266.144" y="-29.6656">
|
||||
<tspan x="266.144" y="-29.6656">0x500000</tspan>
|
||||
</text>
|
||||
<text font-size="6.77333" style="fill: #000000;text-anchor:start;font-family:sans-serif;font-style:normal;font-weight:normal" x="266.326" y="1.87412">
|
||||
<tspan x="266.326" y="1.87412">0x800000</tspan>
|
||||
</text>
|
||||
<path style="fill: none; fill-opacity:0; stroke-width: 1; stroke: #000000" d="M 380.877 -151.013 C 401.876,-151.013 379.377,-73.513 400.627,-72.513"/>
|
||||
<path style="fill: none; fill-opacity:0; stroke-width: 1; stroke: #000000" d="M 381.377 -0.763268 C 395.238,-0.763268 387.016,-72.763 400.877,-72.763"/>
|
||||
<text font-size="10.1598" style="fill: #000000;text-anchor:start;font-family:sans-serif;font-style:normal;font-weight:normal" x="406.127" y="-68.513">
|
||||
<tspan x="406.127" y="-68.513">Flash #0</tspan>
|
||||
</text>
|
||||
<path style="fill: none; fill-opacity:0; stroke-width: 1; stroke: #000000" d="M 381.223 -0.537117 C 402.222,-0.537117 379.285,28.8102 399.872,27.8376"/>
|
||||
<path style="fill: none; fill-opacity:0; stroke-width: 1; stroke: #000000" d="M 382.176 54.9128 C 396.037,54.9128 385.445,27.9997 399.548,27.8376"/>
|
||||
<text font-size="10.1598" style="fill: #000000;text-anchor:start;font-family:sans-serif;font-style:normal;font-weight:normal" x="407.157" y="30.2529">
|
||||
<tspan x="407.157" y="30.2529">Flash #1</tspan>
|
||||
</text>
|
||||
<text font-size="6.77333" style="fill: #000000;text-anchor:start;font-family:sans-serif;font-style:normal;font-weight:normal" x="266.591" y="54.9733">
|
||||
<tspan x="266.591" y="54.9733">0xc00000</tspan>
|
||||
</text>
|
||||
<line style="fill: none; fill-opacity:0; stroke-width: 2; stroke-dasharray: 4; stroke: #000000" x1="305.271" y1="-1.2113" x2="378.831" y2="-1.17038"/>
|
||||
</svg>
|
||||
|
After Width: | Height: | Size: 4.5 KiB |
|
|
@ -0,0 +1,16 @@
|
|||
# Lenovo T420
|
||||
|
||||
## Flashing instructions
|
||||
You have to disassemble the whole device, as the flash IC is on the bottom
|
||||
of the mainboard.
|
||||
|
||||
For more details have a look at [T420 / T520 / X220 / T420s / W520 common] and
|
||||
|
||||
```eval_rst
|
||||
:doc:`../../flash_tutorial/ext_power`
|
||||
```
|
||||
|
||||
Steps to access the flash IC are described here [T4xx series].
|
||||
|
||||
[T4xx series]: t4xx_series.md
|
||||
[T420 / T520 / X220 / T420s / W520 common]: xx20_series.md
|
||||
|
|
@ -0,0 +1,15 @@
|
|||
# Lenovo T430
|
||||
|
||||
## Flashing instructions
|
||||
You have to disassemble the whole device, as the flash ICs are on the bottom
|
||||
of the mainboard.
|
||||
|
||||
For more details have a look at [T430 / T530 / X230 / T430s / W530 common] and
|
||||
```eval_rst
|
||||
:doc:`../../flash_tutorial/ext_power`
|
||||
```
|
||||
|
||||
Steps to access the flash IC are described here [T4xx series].
|
||||
|
||||
[T4xx series]: t4xx_series.md
|
||||
[T430 / T530 / X230 / T430s / W530 common]: xx30_series.md
|
||||
|
|
@ -0,0 +1,20 @@
|
|||
# Lenovo T4xx series disassembly instructions
|
||||
|
||||
A skilled engineer takes around 40 minutes to disassemble, flash and reassemble
|
||||
the whole device.
|
||||
|
||||
# Steps to access the flash IC:
|
||||
|
||||
* Unplug the main battery
|
||||
* Remove the harddisk, CDROM, ExpressCard, SIM-card, SDcard, SmartCard, ...
|
||||
* Open the bottom flap and remove the keyboard screw
|
||||
* Remove the keyboard
|
||||
* Remove the screen
|
||||
* Remove the top enclosure
|
||||
* Remove the CMOS battery
|
||||
* Remove the speakers
|
||||
* Remove WWAN and WIFI card
|
||||
* Remove the CPU fan
|
||||
* Unplug the power cable
|
||||
* Remove the bottom enclosure
|
||||
* Flip the mainboard and remove the main frame
|
||||
|
|
@ -0,0 +1,48 @@
|
|||
# Lenovo Sandy Bridge series
|
||||
|
||||
## Flashing coreboot
|
||||
```eval_rst
|
||||
+---------------------+--------------------+
|
||||
| Type | Value |
|
||||
+=====================+====================+
|
||||
| Socketed flash | no |
|
||||
+---------------------+--------------------+
|
||||
| Size | 8 MiB |
|
||||
+---------------------+--------------------+
|
||||
| In circuit flashing | Yes |
|
||||
+---------------------+--------------------+
|
||||
| Package | SOIC-8 |
|
||||
+---------------------+--------------------+
|
||||
| Write protection | No |
|
||||
+---------------------+--------------------+
|
||||
| Dual BIOS feature | No |
|
||||
+---------------------+--------------------+
|
||||
| Internal flashing | Yes |
|
||||
+---------------------+--------------------+
|
||||
```
|
||||
|
||||
## Installation instructions
|
||||
* Update the EC firmware, as there's no support for EC updates in coreboot.
|
||||
* Do **NOT** accidently swap pins or power on the board while a SPI flasher
|
||||
is connected. It will destroy your device.
|
||||
* It's recommended to only flash the BIOS region. In that case you don't
|
||||
need to extract BLOBs from vendor firmware.
|
||||
If you want to flash the whole chip, you need BLOBs when building
|
||||
coreboot.
|
||||
* The shipped *Flash layout* allocates 3MiB to the BIOS region, which is the space
|
||||
usable by coreboot.
|
||||
* ROM chip size should be set to 8MiB.
|
||||
|
||||
```eval_rst
|
||||
Please also have a look at :doc:`../../flash_tutorial/index`.
|
||||
```
|
||||
|
||||
## Flash layout
|
||||
There's one 8MiB flash which contains IFD, GBE, ME and BIOS regions.
|
||||
On Lenovo's UEFI the EC firmware update is placed at the start of the BIOS
|
||||
region. The update is then written into the EC once.
|
||||
|
||||
![][fl]
|
||||
|
||||
[fl]: flashlayout_xx20.svg
|
||||
|
||||
|
|
@ -0,0 +1,76 @@
|
|||
# Lenovo Ivy Bridge series
|
||||
|
||||
## Flashing coreboot
|
||||
```eval_rst
|
||||
+---------------------+--------------------------------+
|
||||
| Type | Value |
|
||||
+=====================+================================+
|
||||
| Socketed flash | no |
|
||||
+---------------------+--------------------------------+
|
||||
| Size | 8 MiB + 4MiB |
|
||||
+---------------------+--------------------------------+
|
||||
| In circuit flashing | Yes |
|
||||
+---------------------+--------------------------------+
|
||||
| Package | SOIC-8 |
|
||||
+---------------------+--------------------------------+
|
||||
| Write protection | No |
|
||||
+---------------------+--------------------------------+
|
||||
| Dual BIOS feature | No |
|
||||
+---------------------+--------------------------------+
|
||||
| Internal flashing | Yes |
|
||||
+---------------------+--------------------------------+
|
||||
```
|
||||
|
||||
## Installation instructions
|
||||
* Update the EC firmware, as there's no support for EC updates in coreboot.
|
||||
* Do **NOT** accidently swap pins or power on the board while a SPI flasher
|
||||
is connected. It will permanently brick your device.
|
||||
* It's recommended to only flash the BIOS region. In that case you don't
|
||||
need to extract BLOBs from vendor firmware.
|
||||
If you want to flash the whole chip, you need BLOBs when building
|
||||
coreboot.
|
||||
* The *Flash layout* shows that by default 7MiB of space are available for
|
||||
the use with coreboot.
|
||||
* In that case you only want to use a part of the BIOS region that must not
|
||||
exceed 4MiB in size, which means CONFIG_CBFS_SIZE must be smaller than 4MiB.
|
||||
* ROM chip size should be set to 12MiB.
|
||||
|
||||
```eval_rst
|
||||
Please also have a look at :doc:`../../flash_tutorial/index`.
|
||||
```
|
||||
|
||||
## Splitting the coreboot.rom
|
||||
|
||||
To split the coreboot.rom into two images (one for the 8MiB and one for the
|
||||
4 MiB flash IC), run the following commands:
|
||||
|
||||
```bash
|
||||
dd of=top.rom bs=1M if=build/coreboot.rom skip=8
|
||||
dd of=bottom.rom bs=1M if=build/coreboot.rom count=8
|
||||
```
|
||||
|
||||
That gives one ROM for each flash IC, where *top.rom* is the upper part of the
|
||||
flash image, that resides on the 4 MiB flash and *bottom.rom* is the lower part
|
||||
of the flash image, that resides on the 8 MiB flash.
|
||||
|
||||
## Dumping a full ROM
|
||||
|
||||
If you flash externally you need to read both flash chips to get two images
|
||||
(one for the 8MiB and one for the 4 MiB flash IC), and then run the following
|
||||
command to concatenate the files:
|
||||
|
||||
```bash
|
||||
cat bottom.rom top.rom > firmware.rom
|
||||
```
|
||||
|
||||
## Flash layout
|
||||
There's one 8MiB and one 4 MiB flash which contains IFD, GBE, ME and
|
||||
BIOS region. These two flash ICs appear as a single 12MiB when flashing
|
||||
internally.
|
||||
On Lenovo's UEFI the EC firmware update is placed at the start of the BIOS
|
||||
region. The update is then written into the EC once.
|
||||
|
||||
![][fl]
|
||||
|
||||
[fl]: flashlayout_xx30.svg
|
||||
|
||||
Loading…
Reference in New Issue