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Revision 1.8 - (hide annotations) (download) (as text)
Wed Aug 25 15:27:42 2004 UTC (10 years ago) by neysx
Branch: MAIN
Changes since 1.7: +7 -12 lines
File MIME type: application/xml
Cleanup, removed
- kernel 2.6 comments in code samples because it's now the only choice (2.4 has just been removed)
- traces of JFS because it is not supported on PPC (HB says so)

1 swift 1.1 <?xml version='1.0' encoding='UTF-8'?>
2     <!DOCTYPE sections SYSTEM "/dtd/book.dtd">
3    
4     <!-- The content of this document is licensed under the CC-BY-SA license -->
5     <!-- See http://creativecommons.org/licenses/by-sa/1.0 -->
6    
7 neysx 1.8 <!-- $Header: /var/cvsroot/gentoo/xml/htdocs/doc/en/handbook/hb-install-ppc-kernel.xml,v 1.7 2004/08/24 00:00:35 pylon Exp $ -->
8 swift 1.1
9     <sections>
10     <section>
11     <title>Timezone</title>
12     <body>
13    
14     <p>
15     You first need to select your timezone so that your system knows where it is
16     located. Look for your timezone in <path>/usr/share/zoneinfo</path>, then make a
17     symlink to <path>/etc/localtime</path> using <c>ln</c>:
18     </p>
19    
20     <pre caption="Setting the timezone information">
21     # <i>ls /usr/share/zoneinfo</i>
22     <comment>(Suppose you want to use GMT)</comment>
23     # <i>ln -sf /usr/share/zoneinfo/GMT /etc/localtime</i>
24     </pre>
25    
26     </body>
27     </section>
28     <section>
29     <title>Installing the Sources</title>
30     <subsection>
31     <title>Choosing a Kernel</title>
32     <body>
33    
34     <p>
35     The core around which all distributions are built is the Linux kernel. It is the
36     layer between the user programs and your system hardware. Gentoo provides its
37     users several possible kernel sources. A full listing with description is
38     available at the <uri link="/doc/en/gentoo-kernel.xml">Gentoo Kernel
39     Guide</uri>.
40     </p>
41    
42     <p>
43 neysx 1.8 For PPC you can choose between <c>development-sources</c> and
44     <c>gentoo-dev-sources</c> (both 2.6 kernels). The latter is available when you
45     perform a networkless installation. Beside those there is special
46     kernel-2.6-patchset for the Pegasos: <c>pegasos-dev-sources</c>. So let's
47     continue with <c>emerge</c>'ing the kernel sources:
48 swift 1.1 </p>
49    
50     <pre caption="Installing a kernel source">
51 dertobi123 1.6 # <i>emerge gentoo-dev-sources</i>
52 swift 1.1 </pre>
53    
54     <p>
55     When you take a look in <path>/usr/src</path> you should see a symlink called
56     <path>linux</path> pointing to your kernel source:
57     </p>
58    
59     <pre caption="Viewing the kernel source symlink">
60     # <i>ls -l /usr/src/linux</i>
61 dertobi123 1.6 lrwxrwxrwx 1 root root 12 Jul 10 10:55 /usr/src/linux -&gt; linux-2.6.7-r9
62 swift 1.1 </pre>
63    
64     <p>
65     If this isn't the case (i.e. the symlink points to a different kernel source)
66     change the symlink before you continue:
67     </p>
68    
69     <pre caption="Changing the kernel source symlink">
70 swift 1.3 # <i>rm /usr/src/linux</i>
71     # <i>cd /usr/src</i>
72 dertobi123 1.6 # <i>ln -s linux-2.6.7-r9 linux</i>
73 swift 1.1 </pre>
74    
75     <p>
76     Now it is time to configure and compile your kernel source. All architectures
77     can use <c>genkernel</c> for this, which will build a generic kernel as used
78     by the LiveCD. We explain the "manual" configuration first though, as it is
79     the best way to optimize your environment.
80     </p>
81    
82     <p>
83 swift 1.2 Continue now with <uri link="#manual">Manual Configuration</uri>.
84 swift 1.1 </p>
85    
86     </body>
87     </subsection>
88     </section>
89     <section id="manual">
90 swift 1.2 <title>Manual Configuration</title>
91 swift 1.1 <subsection>
92     <title>Introduction</title>
93     <body>
94    
95     <p>
96     Manually configuring a kernel is often seen as the most difficult course every
97     Linux users ever has to go through. Nothing is less true -- after configuring a
98     couple of kernels you don't even remember that it was difficult ;)
99     </p>
100    
101     <p>
102     However, one thing <e>is</e> true: you must know your system when you start
103     configuring a kernel manually. Most information can be gathered by viewing the
104     contents of <path>/proc/pci</path> (or by using <c>lspci</c> if available). You
105     can also run <c>lsmod</c> to see what kernel modules the LiveCD uses (it might
106     provide you with a nice hint on what to enable).
107     </p>
108    
109     <p>
110     Now go to your kernel source directory and execute <c>make menuconfig</c>. This
111     will fire up an ncurses-based configuration menu.
112     </p>
113    
114     <pre caption="Invoking menuconfig">
115     # <i>cd /usr/src/linux</i>
116     # <i>make menuconfig</i>
117     </pre>
118    
119     <p>
120     You will be greeted with several configuration sections. We'll first list some
121     options you must activate (otherwise Gentoo will not function, or not function
122     properly without additional tweaks).
123     </p>
124    
125     </body>
126     </subsection>
127     <subsection>
128     <title>Activating Required Options</title>
129     <body>
130    
131     <p>
132     First of all, activate the use of development and experimental code/drivers.
133     You need this, otherwise some very important code/drivers won't show up:
134     </p>
135    
136     <pre caption="Selecting experimental code/drivers">
137     Code maturity level options ---&gt;
138     [*] Prompt for development and/or incomplete code/drivers
139     </pre>
140    
141     <p>
142     Now go to <c>File Systems</c> and select support for the filesystems you use.
143     <e>Don't</e> compile them as modules, otherwise your Gentoo system will not be
144     able to mount your partitions. Also select <c>Virtual memory</c>, <c>/proc
145     file system</c>, <c>/dev file system</c> + <c>Automatically mount at boot</c>:
146     </p>
147    
148     <pre caption="Selecting necessary file systems">
149 dertobi123 1.6 File systems ---&gt;
150     Pseudo Filesystems ---&gt;
151     [*] /proc file system support
152     [*] /dev file system support (OBSOLETE)
153     [*] Automatically mount at boot
154     [*] Virtual memory file system support (former shm fs)
155    
156 swift 1.1 <comment>(Select one or more of the following options as needed by your system)</comment>
157     &lt;*&gt; Reiserfs support
158     &lt;*&gt; Ext3 journalling file system support
159     &lt;*&gt; Second extended fs support
160     &lt;*&gt; XFS filesystem support
161     </pre>
162    
163     <p>
164     If you are using PPPoE to connect to the Internet or you are using a dial-up
165     modem, you will need the following options in the kernel:
166     </p>
167    
168     <pre caption="Selecting PPPoE necessary drivers">
169 neysx 1.4 Device Drivers ---&gt;
170     Networking support ---&gt;
171     &lt;*&gt; PPP (point-to-point protocol) support
172     &lt;*&gt; PPP support for async serial ports
173     &lt;*&gt; PPP support for sync tty ports
174 swift 1.1 </pre>
175    
176     <p>
177     The two compression options won't harm but are not definitely needed, neither
178     does the <c>PPP over Ethernet</c> option, that might only be used by
179     <c>rp-pppoe</c> when configured to do kernel mode PPPoE.
180     </p>
181    
182     <p>
183     If you require it, don't forget to include support in the kernel for your
184     ethernet card.
185     </p>
186    
187     <p>
188     Disable ADB raw keycodes:
189     </p>
190    
191     <pre caption="Disabling ADB raw keycodes">
192     Macintosh Device Drivers ---&gt;
193     [ ] Support for ADB raw keycodes
194     </pre>
195    
196     <p>
197     Also choose the correct RTC support (<e>disable</e> the <c>Enhanced RTC</c>
198     option):
199     </p>
200    
201     <pre caption="Activating the correct RTC option">
202     Character devices ---&gt;
203     [ ] Enhanced RTC
204    
205     General setup ---&gt;
206     [*] Support for /dev/rtc
207     </pre>
208    
209     <p>
210     Users of OldWorld machines will want HFS support so they can copy compiled
211     kernels to the MacOS partition.
212     </p>
213    
214     <pre caption="Activating HFS support">
215     File Systems ---&gt;
216     [*] HFS Support
217     </pre>
218    
219     <p>
220     When you're done configuring your kernel, continue with <uri
221     link="#compiling">Compiling and Installing</uri>.
222     </p>
223    
224     </body>
225     </subsection>
226     <subsection id="compiling">
227     <title>Compiling and Installing</title>
228     <body>
229    
230     <p>
231     Now that your kernel is configured, it is time to compile and install it. Exit
232 dertobi123 1.6 the configuration and run the commands which will compile the kernel:
233 swift 1.1 </p>
234    
235     <pre caption="Compiling the kernel">
236 neysx 1.8 # <i>make all &amp;&amp; make modules_install</i>
237 swift 1.1 </pre>
238    
239     <p>
240     When the kernel is done compiling, copy over the kernel image to
241     <path>/boot</path>.
242     </p>
243    
244     <pre caption="Installing the kernel">
245 dertobi123 1.6 <comment>replace 2.6.7 with your kernel-version</comment>
246     (Apple/IBM) # <i>cp vmlinux /boot/kernel-2.6.7</i>
247     (Pegasos) # <i>cp arch/ppc/boot/images/zImage.chrp /boot/kernel-2.6.7</i>
248 swift 1.2 </pre>
249    
250     <p>
251     Also don't forget to copy over the system map:
252     </p>
253    
254     <pre caption="Copying the system map">
255 dertobi123 1.6 # <i>cp System.map /boot/System.map-2.6.7</i>
256 swift 1.1 </pre>
257    
258     <p>
259     It is also wise to copy over your kernel configuration file to
260     <path>/boot</path>, just in case :)
261     </p>
262    
263     <pre caption="Backing up your kernel configuration">
264 dertobi123 1.6 # <i>cp .config /boot/config-2.6.7</i>
265 swift 1.1 </pre>
266    
267     <p>
268     Now continue with <uri link="#kernel_modules">Installing Separate Kernel
269     Modules</uri>.
270     </p>
271    
272     </body>
273     </subsection>
274     </section>
275     <section id="kernel_modules">
276     <title>Installing Separate Kernel Modules</title>
277     <subsection>
278     <title>Installing Extra Modules</title>
279     <body>
280    
281     <p>
282     If appropriate, you should emerge ebuilds for any additional hardware that is
283     on your system. Here is a list of kernel-related ebuilds that you could emerge:
284     </p>
285    
286     <table>
287     <tcolumn width="1in"/>
288     <tcolumn width="4in"/>
289     <tcolumn width="2in"/>
290     <tr>
291     <th>Ebuild</th>
292     <th>Purpose</th>
293     <th>Command</th>
294     </tr>
295     </table>
296    
297     <p>
298     Beware though, some of these ebuilds might deal with big dependencies. To verify
299     what packages will be installed by emerging an ebuild, use <c>emerge
300     --pretend</c>. For instance, for the <c>xfree-drm</c> package:
301     </p>
302    
303     <pre caption="View full installation package listing">
304     # <i>emerge --pretend xfree-drm</i>
305     </pre>
306    
307     </body>
308     </subsection>
309     <subsection>
310     <title>Configuring the Modules</title>
311     <body>
312    
313     <p>
314     You should list the modules you want automatically loaded in
315 pylon 1.7 <path>/etc/modules.autoload.d/kernel-2.6</path>.
316 swift 1.1 You can add extra options to the modules too if you want.
317     </p>
318    
319     <p>
320     To view all available modules, run the following <c>find</c> command. Don't
321     forget to substitute "&lt;kernel version&gt;" with the version of the kernel you
322     just compiled:
323     </p>
324    
325     <pre caption="Viewing all available modules">
326     # <i>find /lib/modules/&lt;kernel version&gt;/ -type f -iname '*.o' -or -iname '*.ko'</i>
327     </pre>
328    
329     <p>
330     For instance, to automatically load the <c>3c59x.o</c> module, edit the
331 pylon 1.7 <path>kernel-2.6</path> file and enter the module
332 swift 1.1 name in it.
333     </p>
334    
335 dertobi123 1.6 <pre caption="Editing /etc/modules.autoload.d/kernel-2.6">
336     # <i>nano -w /etc/modules.autoload.d/kernel-2.6</i>
337 swift 1.1 </pre>
338    
339 pylon 1.7 <pre caption="/etc/modules.autoload.d/kernel-2.6">
340 swift 1.1 3c59x
341     </pre>
342    
343     <p>
344     Now run <c>modules-update</c> to commit your changes to the
345     <path>/etc/modules.conf</path> file:
346     </p>
347    
348     <pre caption="Running modules-update">
349     # <i>modules-update</i>
350     </pre>
351    
352     <p>
353     Continue the installation with <uri link="?part=1&amp;chap=8">Configuring
354     your System</uri>.
355     </p>
356    
357     </body>
358     </subsection>
359     </section>
360     </sections>

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