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32 .\" $DragonFly: src/share/man/man5/kernconf.5,v 1.8 2008/07/16 01:02:07 thomas Exp $
34 .Dd September 28, 2009
39 .Nd kernel configuration file
52 This manual page describes the structure of the kernel configuration file.
55 to create a build environment where a kernel may be built using
59 for information on how to build kernels.
61 Each line starts with a keyword at the beginning of the line and is
62 followed by additional parameters.
63 Long input lines may be broken into shorter lines by starting the
64 second and subsequent lines with a white space character.
65 Numbers are specified using
68 Blank lines are ignored.
71 character is interpreted as a comment and is ignored along with everything
72 that follows it on the same line.
74 The following keywords are recognized in a configuration file:
76 .Bl -tag -width indent -compact
80 This system is to run on the CPU type
95 More than one CPU type specification can appear in a configuration file.
107 Configures support for device
109 Additional parameters may be passed to specify
111 configuration settings (most often for
114 .Bl -tag -width ".Sy iomem"
116 specifies a bus to which the device is attached.
118 specifies the start address of
120 ports to be used by the device.
122 specifies the number of ports used by the device.
124 is the interrupt line number to be used.
126 specifies the physical memory address used by the device.
128 specifies the physical memory size used by the device.
130 sets various flag bits for the device.
136 Sets the kernel identification string to
142 The system is to run on the machine type
144 This is a legacy keyword, it is normally set to same value as
147 .It Sy machine_arch Xo
150 The system is to run on the machine architecture
152 The legal architectures are
157 .It Sy makeoptions Xo
158 .Ar name Ns Sy = Ns Ar value
166 in the kernel Makefile.
173 variable in the kernel.
176 .Ar name Ns Op Sy = Ns Ar value
180 Some options expect to be assigned a value, which may be an integer,
181 a double-quoted word, a bare word, or an empty string
183 Note that those are eventually handled by the C compiler, so the rules
184 of that language apply.
185 .\"For more information see the
192 Sets the platform of this kernel to
199 meaning either a 32 bit
201 architecture, a 64 bit
203 architecture, or a virtual kernel.
205 .It Sy pseudo-device Xo
209 Includes support for the pseudo-device
211 Some pseudo-devices can have multiple or
217 .Bl -tag -width ".Pa /sys/config/AMD64_GENERIC"
218 .It Pa /sys/config/LINT
219 description of kernel configuration options
220 .It Pa /sys/config/AMD64_GENERIC
223 kernel configuration file
224 .It Pa /sys/config/GENERIC
227 kernel configuration file
228 .It Pa /sys/config/VKERNEL
231 kernel configuration file
241 manual page first appeared in