Mr. Coffee TCX85 User Manual download pdf (Page 24)

Build Your Kernel

Before you begin

This chapter assumes you wish to compile your own Linux kernel for the JavaStation. It assumes you already

know how to compile Linux kernels in general, perhaps on PC, a SPARC server running Linux, or any of the

other Linux ports. If not, read the Kernel−HOWTO and the README file of your kernel source.

Compiling a kernel for a JavaStation is not much different than compiling a Linux kernel elsewhere. You just

need to know the right options to pick. In general, you're compiling for a Sun4M class architecture, and

enabling JavaStation−specific options. The following sections in this chapter will take you through the steps.

While it may be possible to compile the JavaStation −enabled kernel on alternate platforms, this HOWTO

assumes you do it on a Linux/Sparc based server running in 32−bit mode.

Make sure you use 32−bit mode

When compiling your own JavaStation−capable kernel, you need to make sure the Sun server you are

working on is set to 32−bit mode. So, if you're on an Ultra−class machine, be sure you first switch to 32−bit

mode before you begin compiling.

To check what mode you're in, do a uname −a. If it says "sparc", you're in 32−bit mode and don't have to

do anything. If it reports "sparc64", then you should perform a sparc32 bash first to switch to 32−bit

mode. A subsequent uname −a should reflect the change.

Supported Linux Kernel Versions

The kernel source revision you should use depends on which model of JavaStation you have.

Mr. Coffee support has worked since about kernel version 2.2.5, and definitely works out of the box with the

RedHat 6.0+/SPARC distribution kernels.

Krups support did not work well out of the box until the latter 2.3.x kernel cycle. Pete Zaitcev

<[email protected]> added Krups support in the early 2.3.x sequence, but the MMU changes to

the 32−bit SPARC kernel kept it from compiling cleanly until later on. The kernel is known to compile

cleanly with the Mar. 17 CVS kernel, and should compile cleanly with any 2.3.99pre3+ version kernel.

Krups support has been backported by Varol Kapton <[email protected]>, and it is fully

supported in the 2.2.15−prepatch versions.

By the time this document gets widespread exposure, it is hoped that the 2.4.x stable kernel cycle will be

ready, at which time any 2.4.x kernel should compile cleanly with support for the entire JavaStation line.

If you can not get a kernel to compile, you should try the samples pointed to by this document.

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Mr. Coffee TCX85 User Manual Page 24