GNUBoot
/
coreboot-kgpe-d16
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
coreboot-kgpe-d16/Documentation/flash_tutorial/int_flashrom.md

20 lines
609 B
Markdown
Raw Normal View History

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>
2018-08-04 10:04:45 +02:00
# Flashing firmware internally
**WARNING:** If you flash a broken firmware and have no recovery mechanism, you
must use the **external method** to flash a working firmware again.
## Using flashrom
This method does only work on Linux, if it isn't locked down.
Documentation: Use inline code block for kernel parameter Change-Id: I41649d4d0ee0abf9335f6cb3d7b19888c0c62382 Signed-off-by: Evgeny Zinoviev <me@ch1p.io> Reviewed-on: https://review.coreboot.org/c/coreboot/+/38955 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Peter Lemenkov <lemenkov@gmail.com>
2020-02-18 13:03:05 +01:00
You may also need to boot with `iomem=relaxed` in the kernel command
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>
2018-08-04 10:04:45 +02:00
line if CONFIG_IO_STRICT_DEVMEM is set.
For more details please also check [flashrom's wiki].
Use the programmer *internal* to flash *coreboot.rom* internally:
```bash
flashrom -p internal -w coreboot.rom
```
[flashrom's wiki]: https://www.flashrom.org/Flashrom