Hi,
I've got an Eval card from National Semi that contains the SC1200. I'd like to try LinuxBios on it. I've downloaded both the 2.4.18 and 2.4.19 kernels to start with. What patches do I need to apply to the kernel? Is there a config file I can use to configure the kernel, or should I do it manually?
Thanks, Adam
On Tue, 26 Nov 2002, Adam Bezanson wrote:
What patches do I need to apply to the kernel?
to start, none. See how far you can get.
We can get you IDE patches if needed later.
ron
"Adam Bezanson" bezanson@netaudiotech.com writes:
I've got an Eval card from National Semi that contains the SC1200. I'd like to try LinuxBios on it. I've downloaded both the 2.4.18 and 2.4.19 kernels to start with. What patches do I need to apply to the kernel? Is there a config file I can use to configure the kernel, or should I do it manually?
A normal 2.4 Linux kernel will work fine as long as you compile for a 586 CPU (CONFIG_M586), not Pentium or higher (CONFIG_M586TSC and up) since the TSC behaves a bit differently.
If you want support for the watchdog or the GPIO pins in a 2.4 kernel, you can find an old patch from me at:
http://groups.google.com/groups?selm=20020226015215.20118F5B%40acolyte.hack....
An updated version of this patch has been included in Linux 2.5. Alan Cox' 2.5 kernel also has support for doing DMA on the SC1200 IDE controller; I don't know if there is a corresponding patch for 2.4.
Other than that, take a look at the freebios/src/mainboard/nano/nano directory and make a copy of it. All you should have to do is to modify the Pin Multiplexing Register (PMR) and Miscellaneous Config Register (MCR) in the Config file and to modify the irq assignments.
Depending on what you want to do, there are a few limitations with the current LinuxBIOS on the SC1200:
There is no video support in LinuxBIOS itself, so you won't get any video until you have loaded the NatSemi Geode Linux framebuffer driver (can be found at www.linux4.tv under the heading SP1SC10 Platform Image).
There is no SMM/VSA support at all, this means that anything relying on it won't work. What this means is that Audio won't work.
Other than that everything works fine, IDE in PIO mode, the PCI bus, watchdog, GPIOs, everything.
/Christer
I have added this as a FAQ entry. I will try to do this type of FAQ update more frequently from now on.
ron
On Tue, Nov 26, 2002 at 06:45:45PM -0500, Adam Bezanson wrote:
Hi,
I've got an Eval card from National Semi that contains the SC1200. I'd like to try LinuxBios on it. I've downloaded both the 2.4.18 and 2.4.19 kernels to start with. What patches do I need to apply to the kernel? Is there a config file I can use to configure the kernel, or should I do it manually?
You'll have to set up a new mainboard directory for the evaluation board configuration where lots of details about the board have to be entered. It isn't all that hard but wading through the data sheet to learn the architecture and all of the registers took me a while.
//Peter
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Adam Bezanson -
Christer Weinigel -
Peter Stuge -
Ronald G. Minnich