blob: 6c873dceb177c8d79a76bb35ae09a78e7bdb8d6b [file] [log] [blame]
Chris Zankel8e1a6dd2005-06-23 22:01:10 -07001# For a description of the syntax of this configuration file,
Dirk Hohndele4031492007-10-30 13:37:19 -07002# see Documentation/kbuild/kconfig-language.txt.
Chris Zankel8e1a6dd2005-06-23 22:01:10 -07003
4mainmenu "Linux/Xtensa Kernel Configuration"
5
6config FRAME_POINTER
7 bool
8 default n
9
Christoph Lameter66701b12007-02-10 01:43:09 -080010config ZONE_DMA
11 bool
12 default y
13
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070014config XTENSA
15 bool
16 default y
Sam Ravnborgec7748b2008-02-09 10:46:40 +010017 select HAVE_IDE
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070018 help
19 Xtensa processors are 32-bit RISC machines designed by Tensilica
20 primarily for embedded systems. These processors are both
21 configurable and extensible. The Linux port to the Xtensa
22 architecture supports all processor configurations and extensions,
23 with reasonable minimum requirements. The Xtensa Linux project has
24 a home page at <http://xtensa.sourceforge.net/>.
25
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070026config RWSEM_XCHGADD_ALGORITHM
27 bool
28 default y
29
Akinobu Mitad4337aa2006-03-26 01:39:43 -080030config GENERIC_FIND_NEXT_BIT
31 bool
32 default y
33
34config GENERIC_HWEIGHT
35 bool
36 default y
37
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070038config GENERIC_HARDIRQS
39 bool
40 default y
41
David Howellsf0d1b0b2006-12-08 02:37:49 -080042config ARCH_HAS_ILOG2_U32
43 bool
44 default n
45
46config ARCH_HAS_ILOG2_U64
47 bool
48 default n
49
Al Viro5ea81762007-02-11 15:41:31 +000050config NO_IOPORT
51 def_bool y
52
H. Peter Anvinbdc80782008-02-08 04:21:26 -080053config HZ
54 int
55 default 100
56
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070057source "init/Kconfig"
Matt Helsleydc52ddc2008-10-18 20:27:21 -070058source "kernel/Kconfig.freezer"
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070059
60menu "Processor type and features"
61
62choice
63 prompt "Xtensa Processor Configuration"
Chris Zankel173d6682006-12-10 02:18:48 -080064 default XTENSA_VARIANT_FSF
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070065
Chris Zankel173d6682006-12-10 02:18:48 -080066config XTENSA_VARIANT_FSF
Chris Zankel00254272008-10-21 09:11:43 -070067 bool "fsf - default (not generic) configuration"
68
69config XTENSA_VARIANT_DC232B
70 bool "dc232b - Diamond 232L Standard Core Rev.B (LE)"
71 help
72 This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE).
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070073endchoice
74
75config MMU
76 bool
77 default y
78
79config XTENSA_UNALIGNED_USER
80 bool "Unaligned memory access in use space"
81 ---help---
82 The Xtensa architecture currently does not handle unaligned
83 memory accesses in hardware but through an exception handler.
84 Per default, unaligned memory accesses are disabled in user space.
85
86 Say Y here to enable unaligned memory access in user space.
87
88config PREEMPT
89 bool "Preemptible Kernel"
90 ---help---
91 This option reduces the latency of the kernel when reacting to
92 real-time or interactive events by allowing a low priority process to
93 be preempted even if it is in kernel mode executing a system call.
94 Unfortunately the kernel code has some race conditions if both
95 CONFIG_SMP and CONFIG_PREEMPT are enabled, so this option is
96 currently disabled if you are building an SMP kernel.
97
98 Say Y here if you are building a kernel for a desktop, embedded
99 or real-time system. Say N if you are unsure.
100
101config MATH_EMULATION
102 bool "Math emulation"
103 help
104 Can we use information of configuration file?
105
106config HIGHMEM
107 bool "High memory support"
108
109endmenu
110
111menu "Platform options"
112
113choice
114 prompt "Xtensa System Type"
115 default XTENSA_PLATFORM_ISS
116
117config XTENSA_PLATFORM_ISS
118 bool "ISS"
119 help
120 ISS is an acronym for Tensilica's Instruction Set Simulator.
121
122config XTENSA_PLATFORM_XT2000
123 bool "XT2000"
124 help
125 XT2000 is the name of Tensilica's feature-rich emulation platform.
126 This hardware is capable of running a full Linux distribution.
127
128endchoice
129
130
131config XTENSA_CALIBRATE_CCOUNT
132 bool "Auto calibration of the CPU clock rate"
133 ---help---
134 On some platforms (XT2000, for example), the CPU clock rate can
135 vary. The frequency can be determined, however, by measuring
136 against a well known, fixed frequency, such as an UART oscillator.
137
138config XTENSA_CPU_CLOCK
139 int "CPU clock rate [MHz]"
140 depends on !XTENSA_CALIBRATE_CCOUNT
141 default "16"
142
143config GENERIC_CALIBRATE_DELAY
144 bool "Auto calibration of the BogoMIPS value"
145 ---help---
Chris Zankel82300bf2005-06-30 02:58:58 -0700146 The BogoMIPS value can easily be derived from the CPU frequency.
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700147
148config CMDLINE_BOOL
149 bool "Default bootloader kernel arguments"
150
151config CMDLINE
152 string "Initial kernel command string"
153 depends on CMDLINE_BOOL
154 default "console=ttyS0,38400 root=/dev/ram"
155 help
156 On some architectures (EBSA110 and CATS), there is currently no way
157 for the boot loader to pass arguments to the kernel. For these
158 architectures, you should supply some command-line options at build
159 time by entering them here. As a minimum, you should specify the
160 memory size and the root device (e.g., mem=64M root=/dev/nfs).
161
162config SERIAL_CONSOLE
163 bool
164 depends on XTENSA_PLATFORM_ISS
165 default y
166
167config XTENSA_ISS_NETWORK
168 bool
169 depends on XTENSA_PLATFORM_ISS
170 default y
171
Chris Zankel82300bf2005-06-30 02:58:58 -0700172source "mm/Kconfig"
173
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700174endmenu
175
176menu "Bus options"
177
178config PCI
179 bool "PCI support" if !XTENSA_PLATFORM_ISS
180 depends on !XTENSA_PLATFORM_ISS
181 default y
182 help
183 Find out whether you have a PCI motherboard. PCI is the name of a
184 bus system, i.e. the way the CPU talks to the other stuff inside
185 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
186 VESA. If you have PCI, say Y, otherwise N.
187
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700188source "drivers/pci/Kconfig"
189
190config HOTPLUG
191
192 bool "Support for hot-pluggable devices"
193 ---help---
194 Say Y here if you want to plug devices into your computer while
195 the system is running, and be able to use them quickly. In many
196 cases, the devices can likewise be unplugged at any time too.
197
198 One well known example of this is PCMCIA- or PC-cards, credit-card
199 size devices such as network cards, modems or hard drives which are
200 plugged into slots found on all modern laptop computers. Another
201 example, used on modern desktops as well as laptops, is USB.
202
Johannes Berga81792f2008-07-08 19:00:25 +0200203 Enable HOTPLUG and build a modular kernel. Get agent software
204 (from <http://linux-hotplug.sourceforge.net/>) and install it.
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700205 Then your kernel will automatically call out to a user mode "policy
206 agent" (/sbin/hotplug) to load modules and set up software needed
207 to use devices as you hotplug them.
208
209source "drivers/pcmcia/Kconfig"
210
211source "drivers/pci/hotplug/Kconfig"
212
213endmenu
214
Matt LaPlantecab00892006-10-03 22:36:44 +0200215menu "Executable file formats"
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700216
217# only elf supported
218config KCORE_ELF
219 bool
220 depends on PROC_FS
221 default y
222 help
223 If you enabled support for /proc file system then the file
224 /proc/kcore will contain the kernel core image in ELF format. This
225 can be used in gdb:
226
227 $ cd /usr/src/linux ; gdb vmlinux /proc/kcore
228
229 This is especially useful if you have compiled the kernel with the
230 "-g" option to preserve debugging information. It is mainly used
231 for examining kernel data structures on the live kernel.
232
233source "fs/Kconfig.binfmt"
234
235endmenu
236
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700237source "net/Kconfig"
238
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700239source "drivers/Kconfig"
240
241source "fs/Kconfig"
242
243menu "Xtensa initrd options"
244 depends on BLK_DEV_INITRD
245
246 config EMBEDDED_RAMDISK
247 bool "Embed root filesystem ramdisk into the kernel"
248
249config EMBEDDED_RAMDISK_IMAGE
Matt LaPlantecab00892006-10-03 22:36:44 +0200250 string "Filename of gzipped ramdisk image"
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700251 depends on EMBEDDED_RAMDISK
252 default "ramdisk.gz"
253 help
254 This is the filename of the ramdisk image to be built into the
255 kernel. Relative pathnames are relative to arch/xtensa/boot/ramdisk/.
256 The ramdisk image is not part of the kernel distribution; you must
257 provide one yourself.
258endmenu
259
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700260source "arch/xtensa/Kconfig.debug"
261
262source "security/Kconfig"
263
264source "crypto/Kconfig"
265
266source "lib/Kconfig"
267
268