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Chris Zankel8e1a6dd2005-06-23 22:01:10 -07001config FRAME_POINTER
Johannes Weiner35f9cd02009-03-04 16:21:28 +01002 def_bool n
Chris Zankel8e1a6dd2005-06-23 22:01:10 -07003
Christoph Lameter66701b12007-02-10 01:43:09 -08004config ZONE_DMA
Johannes Weiner35f9cd02009-03-04 16:21:28 +01005 def_bool y
Christoph Lameter66701b12007-02-10 01:43:09 -08006
Chris Zankel8e1a6dd2005-06-23 22:01:10 -07007config XTENSA
Johannes Weiner35f9cd02009-03-04 16:21:28 +01008 def_bool y
Sam Ravnborgec7748b2008-02-09 10:46:40 +01009 select HAVE_IDE
Thomas Gleixner3b190a42011-02-06 22:10:54 +010010 select HAVE_GENERIC_HARDIRQS
Thomas Gleixner47a5d9d2011-03-24 18:28:40 +010011 select GENERIC_IRQ_SHOW
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070012 help
13 Xtensa processors are 32-bit RISC machines designed by Tensilica
14 primarily for embedded systems. These processors are both
15 configurable and extensible. The Linux port to the Xtensa
16 architecture supports all processor configurations and extensions,
17 with reasonable minimum requirements. The Xtensa Linux project has
18 a home page at <http://xtensa.sourceforge.net/>.
19
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070020config RWSEM_XCHGADD_ALGORITHM
Johannes Weiner35f9cd02009-03-04 16:21:28 +010021 def_bool y
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070022
Akinobu Mitad4337aa2006-03-26 01:39:43 -080023config GENERIC_HWEIGHT
Johannes Weiner35f9cd02009-03-04 16:21:28 +010024 def_bool y
Akinobu Mitad4337aa2006-03-26 01:39:43 -080025
Johannes Weiner000af2c2009-03-04 16:21:32 +010026config GENERIC_GPIO
27 def_bool y
28
David Howellsf0d1b0b2006-12-08 02:37:49 -080029config ARCH_HAS_ILOG2_U32
Johannes Weiner35f9cd02009-03-04 16:21:28 +010030 def_bool n
David Howellsf0d1b0b2006-12-08 02:37:49 -080031
32config ARCH_HAS_ILOG2_U64
Johannes Weiner35f9cd02009-03-04 16:21:28 +010033 def_bool n
David Howellsf0d1b0b2006-12-08 02:37:49 -080034
Al Viro5ea81762007-02-11 15:41:31 +000035config NO_IOPORT
36 def_bool y
37
H. Peter Anvinbdc80782008-02-08 04:21:26 -080038config HZ
39 int
40 default 100
41
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070042source "init/Kconfig"
Matt Helsleydc52ddc2008-10-18 20:27:21 -070043source "kernel/Kconfig.freezer"
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070044
Johannes Weiner35f9cd02009-03-04 16:21:28 +010045config MMU
46 def_bool n
47
Johannes Weiner4c0d2142009-03-04 16:21:31 +010048config VARIANT_IRQ_SWITCH
49 def_bool n
50
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070051menu "Processor type and features"
52
53choice
54 prompt "Xtensa Processor Configuration"
Chris Zankel173d6682006-12-10 02:18:48 -080055 default XTENSA_VARIANT_FSF
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070056
Chris Zankel173d6682006-12-10 02:18:48 -080057config XTENSA_VARIANT_FSF
Chris Zankel00254272008-10-21 09:11:43 -070058 bool "fsf - default (not generic) configuration"
Johannes Weiner35f9cd02009-03-04 16:21:28 +010059 select MMU
Chris Zankel00254272008-10-21 09:11:43 -070060
61config XTENSA_VARIANT_DC232B
62 bool "dc232b - Diamond 232L Standard Core Rev.B (LE)"
Johannes Weiner35f9cd02009-03-04 16:21:28 +010063 select MMU
Chris Zankel00254272008-10-21 09:11:43 -070064 help
Johannes Weiner35f9cd02009-03-04 16:21:28 +010065 This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE).
Johannes Weiner000af2c2009-03-04 16:21:32 +010066
67config XTENSA_VARIANT_S6000
68 bool "s6000 - Stretch software configurable processor"
69 select VARIANT_IRQ_SWITCH
70 select ARCH_REQUIRE_GPIOLIB
Oskar Schirmerb070a032009-05-11 15:43:36 +020071 select XTENSA_CALIBRATE_CCOUNT
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070072endchoice
73
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070074config XTENSA_UNALIGNED_USER
75 bool "Unaligned memory access in use space"
Johannes Weiner35f9cd02009-03-04 16:21:28 +010076 help
77 The Xtensa architecture currently does not handle unaligned
78 memory accesses in hardware but through an exception handler.
79 Per default, unaligned memory accesses are disabled in user space.
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070080
Johannes Weiner35f9cd02009-03-04 16:21:28 +010081 Say Y here to enable unaligned memory access in user space.
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070082
83config PREEMPT
84 bool "Preemptible Kernel"
Johannes Weiner35f9cd02009-03-04 16:21:28 +010085 help
86 This option reduces the latency of the kernel when reacting to
87 real-time or interactive events by allowing a low priority process to
88 be preempted even if it is in kernel mode executing a system call.
89 Unfortunately the kernel code has some race conditions if both
90 CONFIG_SMP and CONFIG_PREEMPT are enabled, so this option is
91 currently disabled if you are building an SMP kernel.
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070092
Johannes Weiner35f9cd02009-03-04 16:21:28 +010093 Say Y here if you are building a kernel for a desktop, embedded
94 or real-time system. Say N if you are unsure.
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070095
96config MATH_EMULATION
97 bool "Math emulation"
98 help
99 Can we use information of configuration file?
100
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700101endmenu
102
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100103config XTENSA_CALIBRATE_CCOUNT
104 def_bool n
105 help
106 On some platforms (XT2000, for example), the CPU clock rate can
107 vary. The frequency can be determined, however, by measuring
108 against a well known, fixed frequency, such as an UART oscillator.
109
110config SERIAL_CONSOLE
111 def_bool n
112
113config XTENSA_ISS_NETWORK
114 def_bool n
115
116menu "Bus options"
117
118config PCI
119 bool "PCI support"
120 default y
121 help
122 Find out whether you have a PCI motherboard. PCI is the name of a
123 bus system, i.e. the way the CPU talks to the other stuff inside
124 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
125 VESA. If you have PCI, say Y, otherwise N.
126
127source "drivers/pci/Kconfig"
128
Chris Zankel35e71f92009-04-16 00:25:39 -0700129endmenu
130
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700131menu "Platform options"
132
133choice
134 prompt "Xtensa System Type"
135 default XTENSA_PLATFORM_ISS
136
137config XTENSA_PLATFORM_ISS
138 bool "ISS"
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100139 select XTENSA_CALIBRATE_CCOUNT
140 select SERIAL_CONSOLE
141 select XTENSA_ISS_NETWORK
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700142 help
143 ISS is an acronym for Tensilica's Instruction Set Simulator.
144
145config XTENSA_PLATFORM_XT2000
146 bool "XT2000"
147 help
148 XT2000 is the name of Tensilica's feature-rich emulation platform.
149 This hardware is capable of running a full Linux distribution.
150
Johannes Weinerf82e9392009-03-04 16:21:33 +0100151config XTENSA_PLATFORM_S6105
152 bool "S6105"
153 select SERIAL_CONSOLE
154
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700155endchoice
156
157
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700158config XTENSA_CPU_CLOCK
159 int "CPU clock rate [MHz]"
160 depends on !XTENSA_CALIBRATE_CCOUNT
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100161 default 16
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700162
163config GENERIC_CALIBRATE_DELAY
164 bool "Auto calibration of the BogoMIPS value"
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100165 help
Chris Zankel82300bf2005-06-30 02:58:58 -0700166 The BogoMIPS value can easily be derived from the CPU frequency.
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700167
168config CMDLINE_BOOL
169 bool "Default bootloader kernel arguments"
170
171config CMDLINE
172 string "Initial kernel command string"
173 depends on CMDLINE_BOOL
174 default "console=ttyS0,38400 root=/dev/ram"
175 help
176 On some architectures (EBSA110 and CATS), there is currently no way
177 for the boot loader to pass arguments to the kernel. For these
178 architectures, you should supply some command-line options at build
179 time by entering them here. As a minimum, you should specify the
180 memory size and the root device (e.g., mem=64M root=/dev/nfs).
181
Chris Zankel82300bf2005-06-30 02:58:58 -0700182source "mm/Kconfig"
183
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700184config HOTPLUG
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700185 bool "Support for hot-pluggable devices"
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100186 help
187 Say Y here if you want to plug devices into your computer while
188 the system is running, and be able to use them quickly. In many
189 cases, the devices can likewise be unplugged at any time too.
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700190
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100191 One well known example of this is PCMCIA- or PC-cards, credit-card
192 size devices such as network cards, modems or hard drives which are
193 plugged into slots found on all modern laptop computers. Another
194 example, used on modern desktops as well as laptops, is USB.
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700195
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100196 Enable HOTPLUG and build a modular kernel. Get agent software
197 (from <http://linux-hotplug.sourceforge.net/>) and install it.
198 Then your kernel will automatically call out to a user mode "policy
199 agent" (/sbin/hotplug) to load modules and set up software needed
200 to use devices as you hotplug them.
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700201
202source "drivers/pcmcia/Kconfig"
203
204source "drivers/pci/hotplug/Kconfig"
205
206endmenu
207
Matt LaPlantecab00892006-10-03 22:36:44 +0200208menu "Executable file formats"
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700209
210# only elf supported
211config KCORE_ELF
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100212 def_bool y
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700213 depends on PROC_FS
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700214 help
215 If you enabled support for /proc file system then the file
216 /proc/kcore will contain the kernel core image in ELF format. This
217 can be used in gdb:
218
219 $ cd /usr/src/linux ; gdb vmlinux /proc/kcore
220
221 This is especially useful if you have compiled the kernel with the
222 "-g" option to preserve debugging information. It is mainly used
223 for examining kernel data structures on the live kernel.
224
225source "fs/Kconfig.binfmt"
226
227endmenu
228
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700229source "net/Kconfig"
230
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700231source "drivers/Kconfig"
232
233source "fs/Kconfig"
234
235menu "Xtensa initrd options"
236 depends on BLK_DEV_INITRD
237
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100238config EMBEDDED_RAMDISK
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700239 bool "Embed root filesystem ramdisk into the kernel"
240
241config EMBEDDED_RAMDISK_IMAGE
Matt LaPlantecab00892006-10-03 22:36:44 +0200242 string "Filename of gzipped ramdisk image"
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700243 depends on EMBEDDED_RAMDISK
244 default "ramdisk.gz"
245 help
246 This is the filename of the ramdisk image to be built into the
247 kernel. Relative pathnames are relative to arch/xtensa/boot/ramdisk/.
248 The ramdisk image is not part of the kernel distribution; you must
249 provide one yourself.
250endmenu
251
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700252source "arch/xtensa/Kconfig.debug"
253
254source "security/Kconfig"
255
256source "crypto/Kconfig"
257
258source "lib/Kconfig"
259
260