blob: e5b872ba24843ee84ee65346dd87ab79abb6141b [file] [log] [blame]
Christoph Lameter66701b12007-02-10 01:43:09 -08001config ZONE_DMA
Johannes Weiner35f9cd02009-03-04 16:21:28 +01002 def_bool y
Christoph Lameter66701b12007-02-10 01:43:09 -08003
Chris Zankel8e1a6dd2005-06-23 22:01:10 -07004config XTENSA
Johannes Weiner35f9cd02009-03-04 16:21:28 +01005 def_bool y
Max Filippov8f371c72013-04-15 09:21:35 +04006 select ARCH_WANT_FRAME_POINTERS
Max Filippove9691612013-01-06 16:17:21 +04007 select ARCH_WANT_IPC_PARSE_VERSION
Max Filippov6ed65f32012-09-17 05:44:42 +04008 select ARCH_WANT_OPTIONAL_GPIOLIB
Max Filippov25df8192014-02-18 15:29:11 +04009 select BUILDTIME_EXTABLE_SORT
Al Viro3e41f9b2012-10-26 23:41:40 -040010 select CLONE_BACKWARDS
Max Filippovbda89322014-01-29 06:20:46 +040011 select COMMON_CLK
Max Filippov920f8a32014-06-16 08:20:17 +040012 select GENERIC_ATOMIC64
13 select GENERIC_CLOCKEVENTS
14 select GENERIC_IRQ_SHOW
15 select GENERIC_PCI_IOMAP
16 select GENERIC_SCHED_CLOCK
17 select HAVE_FUNCTION_TRACER
Max Filippov920f8a32014-06-16 08:20:17 +040018 select HAVE_IRQ_TIME_ACCOUNTING
19 select HAVE_OPROFILE
20 select HAVE_PERF_EVENTS
21 select IRQ_DOMAIN
22 select MODULES_USE_ELF_RELA
23 select VIRT_TO_BUS
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070024 help
25 Xtensa processors are 32-bit RISC machines designed by Tensilica
26 primarily for embedded systems. These processors are both
27 configurable and extensible. The Linux port to the Xtensa
28 architecture supports all processor configurations and extensions,
29 with reasonable minimum requirements. The Xtensa Linux project has
Masanari Iida0ada4492013-01-04 17:29:18 +090030 a home page at <http://www.linux-xtensa.org/>.
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070031
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070032config RWSEM_XCHGADD_ALGORITHM
Johannes Weiner35f9cd02009-03-04 16:21:28 +010033 def_bool y
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070034
Akinobu Mitad4337aa2006-03-26 01:39:43 -080035config GENERIC_HWEIGHT
Johannes Weiner35f9cd02009-03-04 16:21:28 +010036 def_bool y
Akinobu Mitad4337aa2006-03-26 01:39:43 -080037
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
Uwe Kleine-Königce816fa2014-04-07 15:39:19 -070044config NO_IOPORT_MAP
Max Filippovd046f772012-09-17 05:44:41 +040045 def_bool n
Al Viro5ea81762007-02-11 15:41:31 +000046
H. Peter Anvinbdc80782008-02-08 04:21:26 -080047config HZ
48 int
49 default 100
50
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070051source "init/Kconfig"
Matt Helsleydc52ddc2008-10-18 20:27:21 -070052source "kernel/Kconfig.freezer"
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070053
Max Filippov8f371c72013-04-15 09:21:35 +040054config LOCKDEP_SUPPORT
55 def_bool y
56
Max Filippov3e4196a2013-04-15 09:20:48 +040057config STACKTRACE_SUPPORT
58 def_bool y
59
Max Filippovc92931b2013-03-31 06:32:42 +040060config TRACE_IRQFLAGS_SUPPORT
61 def_bool y
62
Johannes Weiner35f9cd02009-03-04 16:21:28 +010063config MMU
Max Filippov420ae952014-06-16 07:25:06 +040064 bool
65 default n if !XTENSA_VARIANT_CUSTOM
66 default XTENSA_VARIANT_MMU if XTENSA_VARIANT_CUSTOM
Johannes Weiner35f9cd02009-03-04 16:21:28 +010067
Johannes Weiner4c0d2142009-03-04 16:21:31 +010068config VARIANT_IRQ_SWITCH
69 def_bool n
70
Baruch Siacha1a2bde2013-12-18 09:10:29 +020071config HAVE_XTENSA_GPIO32
72 def_bool n
73
Max Filippovf6151362013-10-17 02:42:26 +040074config MAY_HAVE_SMP
75 def_bool n
76
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070077menu "Processor type and features"
78
79choice
80 prompt "Xtensa Processor Configuration"
Chris Zankel173d6682006-12-10 02:18:48 -080081 default XTENSA_VARIANT_FSF
Chris Zankel8e1a6dd2005-06-23 22:01:10 -070082
Chris Zankel173d6682006-12-10 02:18:48 -080083config XTENSA_VARIANT_FSF
Chris Zankel00254272008-10-21 09:11:43 -070084 bool "fsf - default (not generic) configuration"
Johannes Weiner35f9cd02009-03-04 16:21:28 +010085 select MMU
Chris Zankel00254272008-10-21 09:11:43 -070086
87config XTENSA_VARIANT_DC232B
88 bool "dc232b - Diamond 232L Standard Core Rev.B (LE)"
Johannes Weiner35f9cd02009-03-04 16:21:28 +010089 select MMU
Baruch Siacha1a2bde2013-12-18 09:10:29 +020090 select HAVE_XTENSA_GPIO32
Chris Zankel00254272008-10-21 09:11:43 -070091 help
Johannes Weiner35f9cd02009-03-04 16:21:28 +010092 This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE).
Johannes Weiner000af2c2009-03-04 16:21:32 +010093
Pete Delaneyd0b73b42013-01-05 04:57:16 +040094config XTENSA_VARIANT_DC233C
95 bool "dc233c - Diamond 233L Standard Core Rev.C (LE)"
96 select MMU
Baruch Siacha1a2bde2013-12-18 09:10:29 +020097 select HAVE_XTENSA_GPIO32
Pete Delaneyd0b73b42013-01-05 04:57:16 +040098 help
99 This variant refers to Tensilica's Diamond 233L Standard core Rev.C (LE).
100
Max Filippov420ae952014-06-16 07:25:06 +0400101config XTENSA_VARIANT_CUSTOM
102 bool "Custom Xtensa processor configuration"
103 select MAY_HAVE_SMP
104 select HAVE_XTENSA_GPIO32
105 help
106 Select this variant to use a custom Xtensa processor configuration.
107 You will be prompted for a processor variant CORENAME.
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700108endchoice
109
Max Filippov420ae952014-06-16 07:25:06 +0400110config XTENSA_VARIANT_CUSTOM_NAME
111 string "Xtensa Processor Custom Core Variant Name"
112 depends on XTENSA_VARIANT_CUSTOM
113 help
114 Provide the name of a custom Xtensa processor variant.
115 This CORENAME selects arch/xtensa/variant/CORENAME.
116 Dont forget you have to select MMU if you have one.
117
118config XTENSA_VARIANT_NAME
119 string
120 default "dc232b" if XTENSA_VARIANT_DC232B
121 default "dc233c" if XTENSA_VARIANT_DC233C
122 default "fsf" if XTENSA_VARIANT_FSF
Max Filippov420ae952014-06-16 07:25:06 +0400123 default XTENSA_VARIANT_CUSTOM_NAME if XTENSA_VARIANT_CUSTOM
124
125config XTENSA_VARIANT_MMU
126 bool "Core variant has a Full MMU (TLB, Pages, Protection, etc)"
127 depends on XTENSA_VARIANT_CUSTOM
128 default y
129 help
130 Build a Conventional Kernel with full MMU support,
131 ie: it supports a TLB with auto-loading, page protection.
132
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700133config XTENSA_UNALIGNED_USER
134 bool "Unaligned memory access in use space"
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100135 help
136 The Xtensa architecture currently does not handle unaligned
137 memory accesses in hardware but through an exception handler.
138 Per default, unaligned memory accesses are disabled in user space.
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700139
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100140 Say Y here to enable unaligned memory access in user space.
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700141
Frederic Weisbeckerbd96efe2011-07-05 17:45:34 +0200142source "kernel/Kconfig.preempt"
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700143
Max Filippovf6151362013-10-17 02:42:26 +0400144config HAVE_SMP
145 bool "System Supports SMP (MX)"
146 depends on MAY_HAVE_SMP
147 select XTENSA_MX
148 help
149 This option is use to indicate that the system-on-a-chip (SOC)
150 supports Multiprocessing. Multiprocessor support implemented above
151 the CPU core definition and currently needs to be selected manually.
152
153 Multiprocessor support in implemented with external cache and
Masanari Iida769a12a2015-04-27 22:52:07 +0900154 interrupt controllers.
Max Filippovf6151362013-10-17 02:42:26 +0400155
156 The MX interrupt distributer adds Interprocessor Interrupts
157 and causes the IRQ numbers to be increased by 4 for devices
158 like the open cores ethernet driver and the serial interface.
159
160 You still have to select "Enable SMP" to enable SMP on this SOC.
161
162config SMP
163 bool "Enable Symmetric multi-processing support"
164 depends on HAVE_SMP
Max Filippovf6151362013-10-17 02:42:26 +0400165 select GENERIC_SMP_IDLE_THREAD
166 help
167 Enabled SMP Software; allows more than one CPU/CORE
168 to be activated during startup.
169
170config NR_CPUS
171 depends on SMP
172 int "Maximum number of CPUs (2-32)"
173 range 2 32
174 default "4"
175
Max Filippov49b424f2013-10-17 02:42:28 +0400176config HOTPLUG_CPU
177 bool "Enable CPU hotplug support"
178 depends on SMP
179 help
180 Say Y here to allow turning CPUs off and on. CPUs can be
181 controlled through /sys/devices/system/cpu.
182
183 Say N if you want to disable CPU hotplug.
184
Max Filippove85e3352012-12-03 15:01:43 +0400185config INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
186 bool "Initialize Xtensa MMU inside the Linux kernel code"
187 default y
188 help
189 Earlier version initialized the MMU in the exception vector
190 before jumping to _startup in head.S and had an advantage that
191 it was possible to place a software breakpoint at 'reset' and
192 then enter your normal kernel breakpoints once the MMU was mapped
193 to the kernel mappings (0XC0000000).
194
195 This unfortunately doesn't work for U-Boot and likley also wont
196 work for using KEXEC to have a hot kernel ready for doing a
197 KDUMP.
198
199 So now the MMU is initialized in head.S but it's necessary to
200 use hardware breakpoints (gdb 'hbreak' cmd) to break at _startup.
201 xt-gdb can't place a Software Breakpoint in the 0XD region prior
202 to mapping the MMU and after mapping even if the area of low memory
203 was mapped gdb wouldn't remove the breakpoint on hitting it as the
204 PC wouldn't match. Since Hardware Breakpoints are recommended for
205 Linux configurations it seems reasonable to just assume they exist
206 and leave this older mechanism for unfortunate souls that choose
207 not to follow Tensilica's recommendation.
208
209 Selecting this will cause U-Boot to set the KERNEL Load and Entry
210 address at 0x00003000 instead of the mapped std of 0xD0003000.
211
212 If in doubt, say Y.
213
Max Filippov65559102014-02-04 02:17:09 +0400214config HIGHMEM
215 bool "High Memory Support"
Max Filippov8a9de052014-06-16 08:15:43 +0400216 depends on MMU
Max Filippov65559102014-02-04 02:17:09 +0400217 help
218 Linux can use the full amount of RAM in the system by
219 default. However, the default MMUv2 setup only maps the
220 lowermost 128 MB of memory linearly to the areas starting
221 at 0xd0000000 (cached) and 0xd8000000 (uncached).
222 When there are more than 128 MB memory in the system not
223 all of it can be "permanently mapped" by the kernel.
224 The physical memory that's not permanently mapped is called
225 "high memory".
226
227 If you are compiling a kernel which will never run on a
228 machine with more than 128 MB total physical RAM, answer
229 N here.
230
231 If unsure, say Y.
232
Max Filippov91842892014-08-07 03:32:30 +0400233config FAST_SYSCALL_XTENSA
234 bool "Enable fast atomic syscalls"
235 default n
236 help
237 fast_syscall_xtensa is a syscall that can make atomic operations
238 on UP kernel when processor has no s32c1i support.
239
240 This syscall is deprecated. It may have issues when called with
241 invalid arguments. It is provided only for backwards compatibility.
242 Only enable it if your userspace software requires it.
243
244 If unsure, say N.
245
246config FAST_SYSCALL_SPILL_REGISTERS
247 bool "Enable spill registers syscall"
248 default n
249 help
250 fast_syscall_spill_registers is a syscall that spills all active
251 register windows of a calling userspace task onto its stack.
252
253 This syscall is deprecated. It may have issues when called with
254 invalid arguments. It is provided only for backwards compatibility.
255 Only enable it if your userspace software requires it.
256
257 If unsure, say N.
258
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700259endmenu
260
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100261config XTENSA_CALIBRATE_CCOUNT
262 def_bool n
263 help
264 On some platforms (XT2000, for example), the CPU clock rate can
265 vary. The frequency can be determined, however, by measuring
266 against a well known, fixed frequency, such as an UART oscillator.
267
268config SERIAL_CONSOLE
269 def_bool n
270
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100271menu "Bus options"
272
273config PCI
274 bool "PCI support"
275 default y
276 help
277 Find out whether you have a PCI motherboard. PCI is the name of a
278 bus system, i.e. the way the CPU talks to the other stuff inside
279 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
280 VESA. If you have PCI, say Y, otherwise N.
281
282source "drivers/pci/Kconfig"
283
Chris Zankel35e71f92009-04-16 00:25:39 -0700284endmenu
285
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700286menu "Platform options"
287
288choice
289 prompt "Xtensa System Type"
290 default XTENSA_PLATFORM_ISS
291
292config XTENSA_PLATFORM_ISS
293 bool "ISS"
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100294 select XTENSA_CALIBRATE_CCOUNT
295 select SERIAL_CONSOLE
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700296 help
297 ISS is an acronym for Tensilica's Instruction Set Simulator.
298
299config XTENSA_PLATFORM_XT2000
300 bool "XT2000"
Max Filippov49645272014-06-16 08:25:43 +0400301 select HAVE_IDE
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700302 help
303 XT2000 is the name of Tensilica's feature-rich emulation platform.
304 This hardware is capable of running a full Linux distribution.
305
Max Filippov0d456ba2012-11-05 07:37:14 +0400306config XTENSA_PLATFORM_XTFPGA
307 bool "XTFPGA"
Max Filippov61e47e92014-10-04 04:44:04 +0400308 select ETHOC if ETHERNET
Max Filippov3932b9c2014-10-04 04:45:39 +0400309 select PLATFORM_WANT_DEFAULT_MEM
Max Filippov0d456ba2012-11-05 07:37:14 +0400310 select SERIAL_CONSOLE
Max Filippov0d456ba2012-11-05 07:37:14 +0400311 select XTENSA_CALIBRATE_CCOUNT
312 help
313 XTFPGA is the name of Tensilica board family (LX60, LX110, LX200, ML605).
314 This hardware is capable of running a full Linux distribution.
315
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700316endchoice
317
318
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700319config XTENSA_CPU_CLOCK
320 int "CPU clock rate [MHz]"
321 depends on !XTENSA_CALIBRATE_CCOUNT
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100322 default 16
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700323
324config GENERIC_CALIBRATE_DELAY
325 bool "Auto calibration of the BogoMIPS value"
Johannes Weiner35f9cd02009-03-04 16:21:28 +0100326 help
Chris Zankel82300bf2005-06-30 02:58:58 -0700327 The BogoMIPS value can easily be derived from the CPU frequency.
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700328
329config CMDLINE_BOOL
330 bool "Default bootloader kernel arguments"
331
332config CMDLINE
333 string "Initial kernel command string"
334 depends on CMDLINE_BOOL
335 default "console=ttyS0,38400 root=/dev/ram"
336 help
337 On some architectures (EBSA110 and CATS), there is currently no way
338 for the boot loader to pass arguments to the kernel. For these
339 architectures, you should supply some command-line options at build
340 time by entering them here. As a minimum, you should specify the
341 memory size and the root device (e.g., mem=64M root=/dev/nfs).
342
Max Filippovda844a82012-11-04 00:30:13 +0400343config USE_OF
344 bool "Flattened Device Tree support"
345 select OF
346 select OF_EARLY_FLATTREE
347 help
348 Include support for flattened device tree machine descriptions.
349
350config BUILTIN_DTB
351 string "DTB to build into the kernel image"
352 depends on OF
353
Victor Prupisb6c7e872008-05-19 14:50:38 -0700354config BLK_DEV_SIMDISK
355 tristate "Host file-based simulated block device support"
356 default n
Max Filippov7a0684c2014-08-27 14:54:48 +0400357 depends on XTENSA_PLATFORM_ISS && BLOCK
Victor Prupisb6c7e872008-05-19 14:50:38 -0700358 help
359 Create block devices that map to files in the host file system.
360 Device binding to host file may be changed at runtime via proc
361 interface provided the device is not in use.
362
363config BLK_DEV_SIMDISK_COUNT
364 int "Number of host file-based simulated block devices"
365 range 1 10
366 depends on BLK_DEV_SIMDISK
367 default 2
368 help
369 This is the default minimal number of created block devices.
370 Kernel/module parameter 'simdisk_count' may be used to change this
371 value at runtime. More file names (but no more than 10) may be
372 specified as parameters, simdisk_count grows accordingly.
373
374config SIMDISK0_FILENAME
375 string "Host filename for the first simulated device"
376 depends on BLK_DEV_SIMDISK = y
377 default ""
378 help
379 Attach a first simdisk to a host file. Conventionally, this file
380 contains a root file system.
381
382config SIMDISK1_FILENAME
383 string "Host filename for the second simulated device"
384 depends on BLK_DEV_SIMDISK = y && BLK_DEV_SIMDISK_COUNT != 1
385 default ""
386 help
387 Another simulated disk in a host file for a buildroot-independent
388 storage.
389
Chris Zankel82300bf2005-06-30 02:58:58 -0700390source "mm/Kconfig"
391
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700392source "drivers/pcmcia/Kconfig"
393
394source "drivers/pci/hotplug/Kconfig"
395
Max Filippov3932b9c2014-10-04 04:45:39 +0400396config PLATFORM_WANT_DEFAULT_MEM
397 def_bool n
398
399config DEFAULT_MEM_START
400 hex "Physical address of the default memory area start"
401 depends on PLATFORM_WANT_DEFAULT_MEM
402 default 0x00000000 if MMU
403 default 0x40000000 if !MMU
404 help
405 This is a fallback start address of the default memory area, it is
406 used when no physical memory size is passed through DTB or through
407 boot parameter from bootloader.
408
409 In noMMU configuration the following parameters are derived from it:
410 - kernel load address;
411 - kernel entry point address;
412 - relocatable vectors base address;
413 - uBoot load address;
414 - TASK_SIZE.
415
416 If unsure, leave the default value here.
417
418config DEFAULT_MEM_SIZE
419 hex "Maximal size of the default memory area"
420 depends on PLATFORM_WANT_DEFAULT_MEM
421 default 0x04000000
422 help
423 This is a fallback size of the default memory area, it is used when
424 no physical memory size is passed through DTB or through boot
425 parameter from bootloader.
426
427 It's also used for TASK_SIZE calculation in noMMU configuration.
428
429 If unsure, leave the default value here.
430
Max Filippov49490092015-02-27 06:28:00 +0300431config XTFPGA_LCD
432 bool "Enable XTFPGA LCD driver"
433 depends on XTENSA_PLATFORM_XTFPGA
434 default n
435 help
436 There's a 2x16 LCD on most of XTFPGA boards, kernel may output
437 progress messages there during bootup/shutdown. It may be useful
438 during board bringup.
439
440 If unsure, say N.
441
442config XTFPGA_LCD_BASE_ADDR
443 hex "XTFPGA LCD base address"
444 depends on XTFPGA_LCD
445 default "0x0d0c0000"
446 help
447 Base address of the LCD controller inside KIO region.
448 Different boards from XTFPGA family have LCD controller at different
449 addresses. Please consult prototyping user guide for your board for
450 the correct address. Wrong address here may lead to hardware lockup.
451
452config XTFPGA_LCD_8BIT_ACCESS
453 bool "Use 8-bit access to XTFPGA LCD"
454 depends on XTFPGA_LCD
455 default n
456 help
457 LCD may be connected with 4- or 8-bit interface, 8-bit access may
458 only be used with 8-bit interface. Please consult prototyping user
459 guide for your board for the correct interface width.
460
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700461endmenu
462
Matt LaPlantecab00892006-10-03 22:36:44 +0200463menu "Executable file formats"
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700464
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700465source "fs/Kconfig.binfmt"
466
467endmenu
468
Max Filippove00d8b22014-10-29 01:42:01 +0300469menu "Power management options"
470
471source "kernel/power/Kconfig"
472
473endmenu
474
Sam Ravnborgd5950b42005-07-11 21:03:49 -0700475source "net/Kconfig"
476
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700477source "drivers/Kconfig"
478
479source "fs/Kconfig"
480
Chris Zankel8e1a6dd2005-06-23 22:01:10 -0700481source "arch/xtensa/Kconfig.debug"
482
483source "security/Kconfig"
484
485source "crypto/Kconfig"
486
487source "lib/Kconfig"
488
489