blob: ebe228d02b08d6265723306b970a7fd338c5f9ec [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
Johannes Weiner35f9cd02009-03-04 16:21:28 +01007 def_bool n
Chris Zankel8e1a6dd2005-06-23 22:01:10 -07008
Christoph Lameter66701b12007-02-10 01:43:09 -08009config ZONE_DMA
Johannes Weiner35f9cd02009-03-04 16:21:28 +010010 def_bool y
Christoph Lameter66701b12007-02-10 01:43:09 -080011
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070012config XTENSA
Johannes Weiner35f9cd02009-03-04 16:21:28 +010013 def_bool y
Sam Ravnborgec7748b2008-02-09 10:46:40 +010014 select HAVE_IDE
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070015 help
16 Xtensa processors are 32-bit RISC machines designed by Tensilica
17 primarily for embedded systems. These processors are both
18 configurable and extensible. The Linux port to the Xtensa
19 architecture supports all processor configurations and extensions,
20 with reasonable minimum requirements. The Xtensa Linux project has
21 a home page at <http://xtensa.sourceforge.net/>.
22
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070023config RWSEM_XCHGADD_ALGORITHM
Johannes Weiner35f9cd02009-03-04 16:21:28 +010024 def_bool y
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070025
Akinobu Mitad4337aa2006-03-26 01:39:43 -080026config GENERIC_FIND_NEXT_BIT
Johannes Weiner35f9cd02009-03-04 16:21:28 +010027 def_bool y
Akinobu Mitad4337aa2006-03-26 01:39:43 -080028
29config GENERIC_HWEIGHT
Johannes Weiner35f9cd02009-03-04 16:21:28 +010030 def_bool y
Akinobu Mitad4337aa2006-03-26 01:39:43 -080031
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070032config GENERIC_HARDIRQS
Johannes Weiner35f9cd02009-03-04 16:21:28 +010033 def_bool y
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070034
Johannes Weiner000af2c2009-03-04 16:21:32 +010035config GENERIC_GPIO
36 def_bool y
37
David Howellsf0d1b0b2006-12-08 02:37:49 -080038config ARCH_HAS_ILOG2_U32
Johannes Weiner35f9cd02009-03-04 16:21:28 +010039 def_bool n
David Howellsf0d1b0b2006-12-08 02:37:49 -080040
41config ARCH_HAS_ILOG2_U64
Johannes Weiner35f9cd02009-03-04 16:21:28 +010042 def_bool n
David Howellsf0d1b0b2006-12-08 02:37:49 -080043
Al Viro5ea81762007-02-11 15:41:31 +000044config NO_IOPORT
45 def_bool y
46
H. Peter Anvinbdc80782008-02-08 04:21:26 -080047config HZ
48 int
49 default 100
50
Johannes Weinerfcc8f0f2009-03-04 21:39:12 +010051config GENERIC_TIME
52 def_bool y
53
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070054source "init/Kconfig"
Matt Helsleydc52ddc2008-10-18 20:27:21 -070055source "kernel/Kconfig.freezer"
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070056
Johannes Weiner35f9cd02009-03-04 16:21:28 +010057config MMU
58 def_bool n
59
Johannes Weiner4c0d2142009-03-04 16:21:31 +010060config VARIANT_IRQ_SWITCH
61 def_bool n
62
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070063menu "Processor type and features"
64
65choice
66 prompt "Xtensa Processor Configuration"
Chris Zankel173d6682006-12-10 02:18:48 -080067 default XTENSA_VARIANT_FSF
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070068
Chris Zankel173d6682006-12-10 02:18:48 -080069config XTENSA_VARIANT_FSF
Chris Zankel00254272008-10-21 09:11:43 -070070 bool "fsf - default (not generic) configuration"
Johannes Weiner35f9cd02009-03-04 16:21:28 +010071 select MMU
Chris Zankel00254272008-10-21 09:11:43 -070072
73config XTENSA_VARIANT_DC232B
74 bool "dc232b - Diamond 232L Standard Core Rev.B (LE)"
Johannes Weiner35f9cd02009-03-04 16:21:28 +010075 select MMU
Chris Zankel00254272008-10-21 09:11:43 -070076 help
Johannes Weiner35f9cd02009-03-04 16:21:28 +010077 This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE).
Johannes Weiner000af2c2009-03-04 16:21:32 +010078
79config XTENSA_VARIANT_S6000
80 bool "s6000 - Stretch software configurable processor"
81 select VARIANT_IRQ_SWITCH
82 select ARCH_REQUIRE_GPIOLIB
Oskar Schirmerb070a032009-05-11 15:43:36 +020083 select XTENSA_CALIBRATE_CCOUNT
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070084endchoice
85
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070086config XTENSA_UNALIGNED_USER
87 bool "Unaligned memory access in use space"
Johannes Weiner35f9cd02009-03-04 16:21:28 +010088 help
89 The Xtensa architecture currently does not handle unaligned
90 memory accesses in hardware but through an exception handler.
91 Per default, unaligned memory accesses are disabled in user space.
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070092
Johannes Weiner35f9cd02009-03-04 16:21:28 +010093 Say Y here to enable unaligned memory access in user space.
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070094
95config PREEMPT
96 bool "Preemptible Kernel"
Johannes Weiner35f9cd02009-03-04 16:21:28 +010097 help
98 This option reduces the latency of the kernel when reacting to
99 real-time or interactive events by allowing a low priority process to
100 be preempted even if it is in kernel mode executing a system call.
101 Unfortunately the kernel code has some race conditions if both
102 CONFIG_SMP and CONFIG_PREEMPT are enabled, so this option is
103 currently disabled if you are building an SMP kernel.
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700104
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100105 Say Y here if you are building a kernel for a desktop, embedded
106 or real-time system. Say N if you are unsure.
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700107
108config MATH_EMULATION
109 bool "Math emulation"
110 help
111 Can we use information of configuration file?
112
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700113endmenu
114
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100115config XTENSA_CALIBRATE_CCOUNT
116 def_bool n
117 help
118 On some platforms (XT2000, for example), the CPU clock rate can
119 vary. The frequency can be determined, however, by measuring
120 against a well known, fixed frequency, such as an UART oscillator.
121
122config SERIAL_CONSOLE
123 def_bool n
124
125config XTENSA_ISS_NETWORK
126 def_bool n
127
128menu "Bus options"
129
130config PCI
131 bool "PCI support"
132 default y
133 help
134 Find out whether you have a PCI motherboard. PCI is the name of a
135 bus system, i.e. the way the CPU talks to the other stuff inside
136 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
137 VESA. If you have PCI, say Y, otherwise N.
138
139source "drivers/pci/Kconfig"
140
Chris Zankel35e71f92009-04-16 00:25:39 -0700141endmenu
142
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700143menu "Platform options"
144
145choice
146 prompt "Xtensa System Type"
147 default XTENSA_PLATFORM_ISS
148
149config XTENSA_PLATFORM_ISS
150 bool "ISS"
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100151 select XTENSA_CALIBRATE_CCOUNT
152 select SERIAL_CONSOLE
153 select XTENSA_ISS_NETWORK
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700154 help
155 ISS is an acronym for Tensilica's Instruction Set Simulator.
156
157config XTENSA_PLATFORM_XT2000
158 bool "XT2000"
159 help
160 XT2000 is the name of Tensilica's feature-rich emulation platform.
161 This hardware is capable of running a full Linux distribution.
162
Johannes Weinerf82e9392009-03-04 16:21:33 +0100163config XTENSA_PLATFORM_S6105
164 bool "S6105"
165 select SERIAL_CONSOLE
166
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700167endchoice
168
169
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700170config XTENSA_CPU_CLOCK
171 int "CPU clock rate [MHz]"
172 depends on !XTENSA_CALIBRATE_CCOUNT
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100173 default 16
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700174
175config GENERIC_CALIBRATE_DELAY
176 bool "Auto calibration of the BogoMIPS value"
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100177 help
Chris Zankel82300bf2005-06-30 02:58:58 -0700178 The BogoMIPS value can easily be derived from the CPU frequency.
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700179
180config CMDLINE_BOOL
181 bool "Default bootloader kernel arguments"
182
183config CMDLINE
184 string "Initial kernel command string"
185 depends on CMDLINE_BOOL
186 default "console=ttyS0,38400 root=/dev/ram"
187 help
188 On some architectures (EBSA110 and CATS), there is currently no way
189 for the boot loader to pass arguments to the kernel. For these
190 architectures, you should supply some command-line options at build
191 time by entering them here. As a minimum, you should specify the
192 memory size and the root device (e.g., mem=64M root=/dev/nfs).
193
Chris Zankel82300bf2005-06-30 02:58:58 -0700194source "mm/Kconfig"
195
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700196config HOTPLUG
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700197 bool "Support for hot-pluggable devices"
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100198 help
199 Say Y here if you want to plug devices into your computer while
200 the system is running, and be able to use them quickly. In many
201 cases, the devices can likewise be unplugged at any time too.
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700202
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100203 One well known example of this is PCMCIA- or PC-cards, credit-card
204 size devices such as network cards, modems or hard drives which are
205 plugged into slots found on all modern laptop computers. Another
206 example, used on modern desktops as well as laptops, is USB.
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700207
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100208 Enable HOTPLUG and build a modular kernel. Get agent software
209 (from <http://linux-hotplug.sourceforge.net/>) and install it.
210 Then your kernel will automatically call out to a user mode "policy
211 agent" (/sbin/hotplug) to load modules and set up software needed
212 to use devices as you hotplug them.
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700213
214source "drivers/pcmcia/Kconfig"
215
216source "drivers/pci/hotplug/Kconfig"
217
218endmenu
219
Matt LaPlantecab00892006-10-03 22:36:44 +0200220menu "Executable file formats"
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700221
222# only elf supported
223config KCORE_ELF
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100224 def_bool y
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700225 depends on PROC_FS
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700226 help
227 If you enabled support for /proc file system then the file
228 /proc/kcore will contain the kernel core image in ELF format. This
229 can be used in gdb:
230
231 $ cd /usr/src/linux ; gdb vmlinux /proc/kcore
232
233 This is especially useful if you have compiled the kernel with the
234 "-g" option to preserve debugging information. It is mainly used
235 for examining kernel data structures on the live kernel.
236
237source "fs/Kconfig.binfmt"
238
239endmenu
240
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700241source "net/Kconfig"
242
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700243source "drivers/Kconfig"
244
245source "fs/Kconfig"
246
247menu "Xtensa initrd options"
248 depends on BLK_DEV_INITRD
249
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100250config EMBEDDED_RAMDISK
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700251 bool "Embed root filesystem ramdisk into the kernel"
252
253config EMBEDDED_RAMDISK_IMAGE
Matt LaPlantecab00892006-10-03 22:36:44 +0200254 string "Filename of gzipped ramdisk image"
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700255 depends on EMBEDDED_RAMDISK
256 default "ramdisk.gz"
257 help
258 This is the filename of the ramdisk image to be built into the
259 kernel. Relative pathnames are relative to arch/xtensa/boot/ramdisk/.
260 The ramdisk image is not part of the kernel distribution; you must
261 provide one yourself.
262endmenu
263
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700264source "arch/xtensa/Kconfig.debug"
265
266source "security/Kconfig"
267
268source "crypto/Kconfig"
269
270source "lib/Kconfig"
271
272