Commit | Line | Data |
---|---|---|
66701b14 | 1 | config ZONE_DMA |
35f9cd08 | 2 | def_bool y |
66701b14 | 3 | |
8e1a6dd2 | 4 | config XTENSA |
35f9cd08 | 5 | def_bool y |
8f371c75 | 6 | select ARCH_WANT_FRAME_POINTERS |
e969161b | 7 | select ARCH_WANT_IPC_PARSE_VERSION |
6ed65f37 | 8 | select ARCH_WANT_OPTIONAL_GPIOLIB |
25df8198 | 9 | select BUILDTIME_EXTABLE_SORT |
3e41f9ba | 10 | select CLONE_BACKWARDS |
920f8a39 MF |
11 | select COMMON_CLK |
12 | select GENERIC_ATOMIC64 | |
13 | select GENERIC_CLOCKEVENTS | |
14 | select GENERIC_IRQ_SHOW | |
15 | select GENERIC_PCI_IOMAP | |
16 | select GENERIC_SCHED_CLOCK | |
478ba61a | 17 | select HAVE_FUNCTION_TRACER |
496543c4 | 18 | select HAVE_IRQ_TIME_ACCOUNTING |
920f8a39 | 19 | select HAVE_OPROFILE |
a6f3eefa | 20 | select HAVE_PERF_EVENTS |
920f8a39 MF |
21 | select IRQ_DOMAIN |
22 | select MODULES_USE_ELF_RELA | |
23 | select VIRT_TO_BUS | |
8e1a6dd2 CZ |
24 | 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 | |
0ada4490 | 30 | a home page at <http://www.linux-xtensa.org/>. |
8e1a6dd2 | 31 | |
8e1a6dd2 | 32 | config RWSEM_XCHGADD_ALGORITHM |
35f9cd08 | 33 | def_bool y |
8e1a6dd2 | 34 | |
d4337aa5 | 35 | config GENERIC_HWEIGHT |
35f9cd08 | 36 | def_bool y |
d4337aa5 | 37 | |
f0d1b0b3 | 38 | config ARCH_HAS_ILOG2_U32 |
35f9cd08 | 39 | def_bool n |
f0d1b0b3 DH |
40 | |
41 | config ARCH_HAS_ILOG2_U64 | |
35f9cd08 | 42 | def_bool n |
f0d1b0b3 | 43 | |
ce816fa8 | 44 | config NO_IOPORT_MAP |
d046f77e | 45 | def_bool n |
5ea81769 | 46 | |
bdc80787 PA |
47 | config HZ |
48 | int | |
49 | default 100 | |
50 | ||
8e1a6dd2 | 51 | source "init/Kconfig" |
dc52ddc0 | 52 | source "kernel/Kconfig.freezer" |
8e1a6dd2 | 53 | |
8f371c75 MF |
54 | config LOCKDEP_SUPPORT |
55 | def_bool y | |
56 | ||
3e4196a5 MF |
57 | config STACKTRACE_SUPPORT |
58 | def_bool y | |
59 | ||
c92931b2 MF |
60 | config TRACE_IRQFLAGS_SUPPORT |
61 | def_bool y | |
62 | ||
35f9cd08 | 63 | config MMU |
420ae951 MF |
64 | bool |
65 | default n if !XTENSA_VARIANT_CUSTOM | |
66 | default XTENSA_VARIANT_MMU if XTENSA_VARIANT_CUSTOM | |
35f9cd08 | 67 | |
4c0d2141 JW |
68 | config VARIANT_IRQ_SWITCH |
69 | def_bool n | |
70 | ||
a1a2bdec BS |
71 | config HAVE_XTENSA_GPIO32 |
72 | def_bool n | |
73 | ||
f615136c MF |
74 | config MAY_HAVE_SMP |
75 | def_bool n | |
76 | ||
8e1a6dd2 CZ |
77 | menu "Processor type and features" |
78 | ||
79 | choice | |
80 | prompt "Xtensa Processor Configuration" | |
173d6681 | 81 | default XTENSA_VARIANT_FSF |
8e1a6dd2 | 82 | |
173d6681 | 83 | config XTENSA_VARIANT_FSF |
0025427e | 84 | bool "fsf - default (not generic) configuration" |
35f9cd08 | 85 | select MMU |
0025427e CZ |
86 | |
87 | config XTENSA_VARIANT_DC232B | |
88 | bool "dc232b - Diamond 232L Standard Core Rev.B (LE)" | |
35f9cd08 | 89 | select MMU |
a1a2bdec | 90 | select HAVE_XTENSA_GPIO32 |
0025427e | 91 | help |
35f9cd08 | 92 | This variant refers to Tensilica's Diamond 232L Standard core Rev.B (LE). |
000af2c5 | 93 | |
d0b73b48 PD |
94 | config XTENSA_VARIANT_DC233C |
95 | bool "dc233c - Diamond 233L Standard Core Rev.C (LE)" | |
96 | select MMU | |
a1a2bdec | 97 | select HAVE_XTENSA_GPIO32 |
d0b73b48 PD |
98 | help |
99 | This variant refers to Tensilica's Diamond 233L Standard core Rev.C (LE). | |
100 | ||
420ae951 MF |
101 | config 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. | |
8e1a6dd2 CZ |
108 | endchoice |
109 | ||
420ae951 MF |
110 | config 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 | ||
118 | config 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 | |
420ae951 MF |
123 | default XTENSA_VARIANT_CUSTOM_NAME if XTENSA_VARIANT_CUSTOM |
124 | ||
125 | config 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 | ||
8e1a6dd2 CZ |
133 | config XTENSA_UNALIGNED_USER |
134 | bool "Unaligned memory access in use space" | |
35f9cd08 JW |
135 | 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. | |
8e1a6dd2 | 139 | |
35f9cd08 | 140 | Say Y here to enable unaligned memory access in user space. |
8e1a6dd2 | 141 | |
bd96efe1 | 142 | source "kernel/Kconfig.preempt" |
8e1a6dd2 | 143 | |
f615136c MF |
144 | config 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 | |
154 | interrupt controlers. | |
155 | ||
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 | ||
162 | config SMP | |
163 | bool "Enable Symmetric multi-processing support" | |
164 | depends on HAVE_SMP | |
f615136c MF |
165 | select GENERIC_SMP_IDLE_THREAD |
166 | help | |
167 | Enabled SMP Software; allows more than one CPU/CORE | |
168 | to be activated during startup. | |
169 | ||
170 | config NR_CPUS | |
171 | depends on SMP | |
172 | int "Maximum number of CPUs (2-32)" | |
173 | range 2 32 | |
174 | default "4" | |
175 | ||
49b424fe MF |
176 | config 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 | ||
e85e335f MF |
185 | config 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 | ||
65559100 MF |
214 | config HIGHMEM |
215 | bool "High Memory Support" | |
8a9de059 | 216 | depends on MMU |
65559100 MF |
217 | 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 | ||
9184289c MF |
233 | config 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 | ||
246 | config 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 | ||
8e1a6dd2 CZ |
259 | endmenu |
260 | ||
35f9cd08 JW |
261 | config 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 | ||
268 | config SERIAL_CONSOLE | |
269 | def_bool n | |
270 | ||
35f9cd08 JW |
271 | menu "Bus options" |
272 | ||
273 | config 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 | ||
282 | source "drivers/pci/Kconfig" | |
283 | ||
35e71f90 CZ |
284 | endmenu |
285 | ||
8e1a6dd2 CZ |
286 | menu "Platform options" |
287 | ||
288 | choice | |
289 | prompt "Xtensa System Type" | |
290 | default XTENSA_PLATFORM_ISS | |
291 | ||
292 | config XTENSA_PLATFORM_ISS | |
293 | bool "ISS" | |
35f9cd08 JW |
294 | select XTENSA_CALIBRATE_CCOUNT |
295 | select SERIAL_CONSOLE | |
8e1a6dd2 CZ |
296 | help |
297 | ISS is an acronym for Tensilica's Instruction Set Simulator. | |
298 | ||
299 | config XTENSA_PLATFORM_XT2000 | |
300 | bool "XT2000" | |
4964527d | 301 | select HAVE_IDE |
8e1a6dd2 CZ |
302 | 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 | ||
0d456bad MF |
306 | config XTENSA_PLATFORM_XTFPGA |
307 | bool "XTFPGA" | |
61e47e9b | 308 | select ETHOC if ETHERNET |
3932b9ca | 309 | select PLATFORM_WANT_DEFAULT_MEM |
0d456bad | 310 | select SERIAL_CONSOLE |
0d456bad MF |
311 | 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 | ||
8e1a6dd2 CZ |
316 | endchoice |
317 | ||
318 | ||
8e1a6dd2 CZ |
319 | config XTENSA_CPU_CLOCK |
320 | int "CPU clock rate [MHz]" | |
321 | depends on !XTENSA_CALIBRATE_CCOUNT | |
35f9cd08 | 322 | default 16 |
8e1a6dd2 CZ |
323 | |
324 | config GENERIC_CALIBRATE_DELAY | |
325 | bool "Auto calibration of the BogoMIPS value" | |
35f9cd08 | 326 | help |
82300bf4 | 327 | The BogoMIPS value can easily be derived from the CPU frequency. |
8e1a6dd2 CZ |
328 | |
329 | config CMDLINE_BOOL | |
330 | bool "Default bootloader kernel arguments" | |
331 | ||
332 | config 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 | ||
da844a81 MF |
343 | config 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 | ||
350 | config BUILTIN_DTB | |
351 | string "DTB to build into the kernel image" | |
352 | depends on OF | |
353 | ||
b6c7e873 VP |
354 | config BLK_DEV_SIMDISK |
355 | tristate "Host file-based simulated block device support" | |
356 | default n | |
7a0684cd | 357 | depends on XTENSA_PLATFORM_ISS && BLOCK |
b6c7e873 VP |
358 | 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 | ||
363 | config 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 | ||
374 | config 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 | ||
382 | config 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 | ||
82300bf4 CZ |
390 | source "mm/Kconfig" |
391 | ||
8e1a6dd2 CZ |
392 | source "drivers/pcmcia/Kconfig" |
393 | ||
394 | source "drivers/pci/hotplug/Kconfig" | |
395 | ||
3932b9ca MF |
396 | config PLATFORM_WANT_DEFAULT_MEM |
397 | def_bool n | |
398 | ||
399 | config 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 | ||
418 | config 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 | ||
8e1a6dd2 CZ |
431 | endmenu |
432 | ||
cab00891 | 433 | menu "Executable file formats" |
8e1a6dd2 | 434 | |
8e1a6dd2 CZ |
435 | source "fs/Kconfig.binfmt" |
436 | ||
437 | endmenu | |
438 | ||
e00d8b2f MF |
439 | menu "Power management options" |
440 | ||
441 | source "kernel/power/Kconfig" | |
442 | ||
443 | endmenu | |
444 | ||
d5950b43 SR |
445 | source "net/Kconfig" |
446 | ||
8e1a6dd2 CZ |
447 | source "drivers/Kconfig" |
448 | ||
449 | source "fs/Kconfig" | |
450 | ||
8e1a6dd2 CZ |
451 | source "arch/xtensa/Kconfig.debug" |
452 | ||
453 | source "security/Kconfig" | |
454 | ||
455 | source "crypto/Kconfig" | |
456 | ||
457 | source "lib/Kconfig" | |
458 | ||
459 |