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README: minor clarifications

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Martin Kepplinger 6 years ago
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@ -3,7 +3,8 @@ pre-built coreboot images and documentation on how to flash them for the Thinkpa
These images These images
* include [SeaBIOS](https://seabios.org/SeaBIOS) as coreboot payload, for maximum compatibility. * include [SeaBIOS](https://seabios.org/SeaBIOS) as coreboot payload, for maximum compatibility.
* are meant to be [flashed externally](#how-to-flash)
* are meant to be [flashed externally](#how-to-flash) (...top.rom release files)
* ...full.rom release files are not functional entirely. Only the the top 4M are usable.
* are compatible with Windows and Linux * are compatible with Windows and Linux
## Latest build (config overview and version info) ## Latest build (config overview and version info)
@ -38,7 +39,8 @@ Download a released image, connect your hardware SPI flasher to the "upper"
flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=128 -w x230_coreboot_seabios_example_top.rom flashrom -p linux_spi:dev=/dev/spidev0.0,spispeed=128 -w x230_coreboot_seabios_example_top.rom
where `linux_spi:` is the example of using your SPI pins of, for example, a where `linux_spi:` is the example of using your SPI pins of, for example, a
Raspberry Pi.
Raspberry Pi. A [Bus Pirate](http://dangerousprototypes.com/docs/Bus_Pirate) with
`buspirate_spi` or others connected to the host directly should be fine too.
## Flashing for the first time ## Flashing for the first time
@ -107,8 +109,8 @@ and have the following setup
* Yes, in this case you need a second PC connected to the RPi over UART * Yes, in this case you need a second PC connected to the RPi over UART
* in the SD Cards's `/boot/config.txt` file `enable_uart=1` and `dtparam=spi=on` * in the SD Cards's `/boot/config.txt` file `enable_uart=1` and `dtparam=spi=on`
* [For flashrom](https://www.flashrom.org/RaspberryPi) we put `spi_bcm2835` and `spidev` in /etc/modules * [For flashrom](https://www.flashrom.org/RaspberryPi) we put `spi_bcm2835` and `spidev` in /etc/modules
* [Connect to a wifi](https://www.raspberrypi.org/documentation/configuration/wireless/wireless-cli.md) or to network over ethernet.
* install `flashrom`
* [Connect to a wifi](https://www.raspberrypi.org/documentation/configuration/wireless/wireless-cli.md) or to network over ethernet to install `flashrom`
* only use the ...top.rom release file
* connect the Clip to the Raspberry Pi 3: * connect the Clip to the Raspberry Pi 3:
@ -151,10 +153,13 @@ NOT YET AVAILABLE HERE
* make sure you have your backups * make sure you have your backups
* I find this to be a little more dangerous, but in this case you don't need any additional hardware * I find this to be a little more dangerous, but in this case you don't need any additional hardware
* create the following file (named x230-layout.txt): * create the following file (named x230-layout.txt):
* here you'll use the ...full.rom release file
0x00000000:0x007fffff ifdmegbe 0x00000000:0x007fffff ifdmegbe
0x00800000:0x00bfffff bios 0x00800000:0x00bfffff bios
* Boot Linux with the `iomem=relaxed` boot parameter (for example set in /etc/default/grub) and use * Boot Linux with the `iomem=relaxed` boot parameter (for example set in /etc/default/grub) and use
`flashrom -p internal --layout x230-layout.txt --image bios -w x230_coreboot_seabios_example_full.rom` `flashrom -p internal --layout x230-layout.txt --image bios -w x230_coreboot_seabios_example_full.rom`


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