85 lines
3.2 KiB
Markdown
85 lines
3.2 KiB
Markdown
# Gigabyte GA-H61M-S2PV
|
|
|
|
This page describes how to run coreboot on the [Gigabyte GA-H61M-S2PV] desktop
|
|
from [Gigabyte].
|
|
|
|
## Flashing coreboot
|
|
|
|
```eval_rst
|
|
+---------------------+------------+
|
|
| Type | Value |
|
|
+=====================+============+
|
|
| Socketed flash | No |
|
|
+---------------------+------------+
|
|
| Model | MX25L3206E |
|
|
+---------------------+------------+
|
|
| Size | 4 MiB |
|
|
+---------------------+------------+
|
|
| In circuit flashing | Yes |
|
|
+---------------------+------------+
|
|
| Package | SOIC-8 |
|
|
+---------------------+------------+
|
|
| Write protection | No |
|
|
+---------------------+------------+
|
|
| Dual BIOS feature | Yes |
|
|
+---------------------+------------+
|
|
| Internal flashing | Yes |
|
|
+---------------------+------------+
|
|
```
|
|
|
|
### Internal programming
|
|
|
|
The main SPI flash can be accessed using [flashrom]. The DualBIOS backup flash
|
|
chip is accessible as well using the `dualbiosindex` programmer parameter.
|
|
Since the flash recovery mechanism works even with coreboot installed on the
|
|
main flash chip (it still restores the vendor UEFI though), it is useful to
|
|
leave the backup chip untouched.
|
|
|
|
### Notes about the original firmware
|
|
|
|
The original IFD defines the BIOS region as the whole flash chip. While this is
|
|
not an issue if flashing a complete image, it confuses flashrom and trashes the
|
|
flash chip's contents when using the --ifd option. However, this can be easily
|
|
fixed by reading the IFD with flashrom, editing the correct values into it with
|
|
ifdtool and then reflashing it.
|
|
|
|
Create a layout.txt with the following contents:
|
|
|
|
00000000:00000fff fd
|
|
00180000:003fffff bios
|
|
00001000:0017ffff me
|
|
|
|
After that, simply run:
|
|
|
|
```bash
|
|
sudo flashrom -p internal --ifd -i fd -r ifd.rom
|
|
ifdtool -n layout.txt ifd.rom
|
|
sudo flashrom -p internal --ifd -i fd -w ifd.rom.new
|
|
```
|
|
|
|
After flashing, power cycle the computer to ensure the new IFD is being used.
|
|
If only a reboot is done, the old IFD layout is still seen by flashrom, even if
|
|
the IFD on the flash chip is correctly defining the new region layout.
|
|
|
|
## Technology
|
|
|
|
```eval_rst
|
|
+------------------+--------------------------------------------------+
|
|
| Northbridge | :doc:`../../northbridge/intel/sandybridge/index` |
|
|
+------------------+--------------------------------------------------+
|
|
| Southbridge | bd82x6x |
|
|
+------------------+--------------------------------------------------+
|
|
| CPU | model_206ax |
|
|
+------------------+--------------------------------------------------+
|
|
| SuperIO | ITE IT8728F |
|
|
+------------------+--------------------------------------------------+
|
|
| EC | None |
|
|
+------------------+--------------------------------------------------+
|
|
| Coprocessor | Intel ME |
|
|
+------------------+--------------------------------------------------+
|
|
```
|
|
|
|
[Gigabyte GA-H61M-S2PV]: https://www.gigabyte.com/us/Motherboard/GA-H61M-S2PV-rev-10
|
|
[Gigabyte]: https://www.gigabyte.com
|
|
[flashrom]: https://flashrom.org/Flashrom
|