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Commit | Line | Data |
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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 | ||
000af2c5 JW |
101 | config XTENSA_VARIANT_S6000 |
102 | bool "s6000 - Stretch software configurable processor" | |
103 | select VARIANT_IRQ_SWITCH | |
104 | select ARCH_REQUIRE_GPIOLIB | |
b070a03f | 105 | select XTENSA_CALIBRATE_CCOUNT |
420ae951 MF |
106 | |
107 | config XTENSA_VARIANT_CUSTOM | |
108 | bool "Custom Xtensa processor configuration" | |
109 | select MAY_HAVE_SMP | |
110 | select HAVE_XTENSA_GPIO32 | |
111 | help | |
112 | Select this variant to use a custom Xtensa processor configuration. | |
113 | You will be prompted for a processor variant CORENAME. | |
8e1a6dd2 CZ |
114 | endchoice |
115 | ||
420ae951 MF |
116 | config XTENSA_VARIANT_CUSTOM_NAME |
117 | string "Xtensa Processor Custom Core Variant Name" | |
118 | depends on XTENSA_VARIANT_CUSTOM | |
119 | help | |
120 | Provide the name of a custom Xtensa processor variant. | |
121 | This CORENAME selects arch/xtensa/variant/CORENAME. | |
122 | Dont forget you have to select MMU if you have one. | |
123 | ||
124 | config XTENSA_VARIANT_NAME | |
125 | string | |
126 | default "dc232b" if XTENSA_VARIANT_DC232B | |
127 | default "dc233c" if XTENSA_VARIANT_DC233C | |
128 | default "fsf" if XTENSA_VARIANT_FSF | |
129 | default "s6000" if XTENSA_VARIANT_S6000 | |
130 | default XTENSA_VARIANT_CUSTOM_NAME if XTENSA_VARIANT_CUSTOM | |
131 | ||
132 | config XTENSA_VARIANT_MMU | |
133 | bool "Core variant has a Full MMU (TLB, Pages, Protection, etc)" | |
134 | depends on XTENSA_VARIANT_CUSTOM | |
135 | default y | |
136 | help | |
137 | Build a Conventional Kernel with full MMU support, | |
138 | ie: it supports a TLB with auto-loading, page protection. | |
139 | ||
8e1a6dd2 CZ |
140 | config XTENSA_UNALIGNED_USER |
141 | bool "Unaligned memory access in use space" | |
35f9cd08 JW |
142 | help |
143 | The Xtensa architecture currently does not handle unaligned | |
144 | memory accesses in hardware but through an exception handler. | |
145 | Per default, unaligned memory accesses are disabled in user space. | |
8e1a6dd2 | 146 | |
35f9cd08 | 147 | Say Y here to enable unaligned memory access in user space. |
8e1a6dd2 | 148 | |
bd96efe1 | 149 | source "kernel/Kconfig.preempt" |
8e1a6dd2 | 150 | |
f615136c MF |
151 | config HAVE_SMP |
152 | bool "System Supports SMP (MX)" | |
153 | depends on MAY_HAVE_SMP | |
154 | select XTENSA_MX | |
155 | help | |
156 | This option is use to indicate that the system-on-a-chip (SOC) | |
157 | supports Multiprocessing. Multiprocessor support implemented above | |
158 | the CPU core definition and currently needs to be selected manually. | |
159 | ||
160 | Multiprocessor support in implemented with external cache and | |
161 | interrupt controlers. | |
162 | ||
163 | The MX interrupt distributer adds Interprocessor Interrupts | |
164 | and causes the IRQ numbers to be increased by 4 for devices | |
165 | like the open cores ethernet driver and the serial interface. | |
166 | ||
167 | You still have to select "Enable SMP" to enable SMP on this SOC. | |
168 | ||
169 | config SMP | |
170 | bool "Enable Symmetric multi-processing support" | |
171 | depends on HAVE_SMP | |
f615136c MF |
172 | select GENERIC_SMP_IDLE_THREAD |
173 | help | |
174 | Enabled SMP Software; allows more than one CPU/CORE | |
175 | to be activated during startup. | |
176 | ||
177 | config NR_CPUS | |
178 | depends on SMP | |
179 | int "Maximum number of CPUs (2-32)" | |
180 | range 2 32 | |
181 | default "4" | |
182 | ||
49b424fe MF |
183 | config HOTPLUG_CPU |
184 | bool "Enable CPU hotplug support" | |
185 | depends on SMP | |
186 | help | |
187 | Say Y here to allow turning CPUs off and on. CPUs can be | |
188 | controlled through /sys/devices/system/cpu. | |
189 | ||
190 | Say N if you want to disable CPU hotplug. | |
191 | ||
e85e335f MF |
192 | config INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX |
193 | bool "Initialize Xtensa MMU inside the Linux kernel code" | |
8a9de059 | 194 | depends on MMU |
e85e335f MF |
195 | default y |
196 | help | |
197 | Earlier version initialized the MMU in the exception vector | |
198 | before jumping to _startup in head.S and had an advantage that | |
199 | it was possible to place a software breakpoint at 'reset' and | |
200 | then enter your normal kernel breakpoints once the MMU was mapped | |
201 | to the kernel mappings (0XC0000000). | |
202 | ||
203 | This unfortunately doesn't work for U-Boot and likley also wont | |
204 | work for using KEXEC to have a hot kernel ready for doing a | |
205 | KDUMP. | |
206 | ||
207 | So now the MMU is initialized in head.S but it's necessary to | |
208 | use hardware breakpoints (gdb 'hbreak' cmd) to break at _startup. | |
209 | xt-gdb can't place a Software Breakpoint in the 0XD region prior | |
210 | to mapping the MMU and after mapping even if the area of low memory | |
211 | was mapped gdb wouldn't remove the breakpoint on hitting it as the | |
212 | PC wouldn't match. Since Hardware Breakpoints are recommended for | |
213 | Linux configurations it seems reasonable to just assume they exist | |
214 | and leave this older mechanism for unfortunate souls that choose | |
215 | not to follow Tensilica's recommendation. | |
216 | ||
217 | Selecting this will cause U-Boot to set the KERNEL Load and Entry | |
218 | address at 0x00003000 instead of the mapped std of 0xD0003000. | |
219 | ||
220 | If in doubt, say Y. | |
221 | ||
65559100 MF |
222 | config HIGHMEM |
223 | bool "High Memory Support" | |
8a9de059 | 224 | depends on MMU |
65559100 MF |
225 | help |
226 | Linux can use the full amount of RAM in the system by | |
227 | default. However, the default MMUv2 setup only maps the | |
228 | lowermost 128 MB of memory linearly to the areas starting | |
229 | at 0xd0000000 (cached) and 0xd8000000 (uncached). | |
230 | When there are more than 128 MB memory in the system not | |
231 | all of it can be "permanently mapped" by the kernel. | |
232 | The physical memory that's not permanently mapped is called | |
233 | "high memory". | |
234 | ||
235 | If you are compiling a kernel which will never run on a | |
236 | machine with more than 128 MB total physical RAM, answer | |
237 | N here. | |
238 | ||
239 | If unsure, say Y. | |
240 | ||
9184289c MF |
241 | config FAST_SYSCALL_XTENSA |
242 | bool "Enable fast atomic syscalls" | |
243 | default n | |
244 | help | |
245 | fast_syscall_xtensa is a syscall that can make atomic operations | |
246 | on UP kernel when processor has no s32c1i support. | |
247 | ||
248 | This syscall is deprecated. It may have issues when called with | |
249 | invalid arguments. It is provided only for backwards compatibility. | |
250 | Only enable it if your userspace software requires it. | |
251 | ||
252 | If unsure, say N. | |
253 | ||
254 | config FAST_SYSCALL_SPILL_REGISTERS | |
255 | bool "Enable spill registers syscall" | |
256 | default n | |
257 | help | |
258 | fast_syscall_spill_registers is a syscall that spills all active | |
259 | register windows of a calling userspace task onto its stack. | |
260 | ||
261 | This syscall is deprecated. It may have issues when called with | |
262 | invalid arguments. It is provided only for backwards compatibility. | |
263 | Only enable it if your userspace software requires it. | |
264 | ||
265 | If unsure, say N. | |
266 | ||
8e1a6dd2 CZ |
267 | endmenu |
268 | ||
35f9cd08 JW |
269 | config XTENSA_CALIBRATE_CCOUNT |
270 | def_bool n | |
271 | help | |
272 | On some platforms (XT2000, for example), the CPU clock rate can | |
273 | vary. The frequency can be determined, however, by measuring | |
274 | against a well known, fixed frequency, such as an UART oscillator. | |
275 | ||
276 | config SERIAL_CONSOLE | |
277 | def_bool n | |
278 | ||
35f9cd08 JW |
279 | menu "Bus options" |
280 | ||
281 | config PCI | |
282 | bool "PCI support" | |
283 | default y | |
284 | help | |
285 | Find out whether you have a PCI motherboard. PCI is the name of a | |
286 | bus system, i.e. the way the CPU talks to the other stuff inside | |
287 | your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or | |
288 | VESA. If you have PCI, say Y, otherwise N. | |
289 | ||
290 | source "drivers/pci/Kconfig" | |
291 | ||
35e71f90 CZ |
292 | endmenu |
293 | ||
8e1a6dd2 CZ |
294 | menu "Platform options" |
295 | ||
296 | choice | |
297 | prompt "Xtensa System Type" | |
298 | default XTENSA_PLATFORM_ISS | |
299 | ||
300 | config XTENSA_PLATFORM_ISS | |
301 | bool "ISS" | |
35f9cd08 JW |
302 | select XTENSA_CALIBRATE_CCOUNT |
303 | select SERIAL_CONSOLE | |
8e1a6dd2 CZ |
304 | help |
305 | ISS is an acronym for Tensilica's Instruction Set Simulator. | |
306 | ||
307 | config XTENSA_PLATFORM_XT2000 | |
308 | bool "XT2000" | |
4964527d | 309 | select HAVE_IDE |
8e1a6dd2 CZ |
310 | help |
311 | XT2000 is the name of Tensilica's feature-rich emulation platform. | |
312 | This hardware is capable of running a full Linux distribution. | |
313 | ||
f82e939f JW |
314 | config XTENSA_PLATFORM_S6105 |
315 | bool "S6105" | |
4964527d | 316 | select HAVE_IDE |
f82e939f | 317 | select SERIAL_CONSOLE |
ce816fa8 | 318 | select NO_IOPORT_MAP |
f82e939f | 319 | |
0d456bad MF |
320 | config XTENSA_PLATFORM_XTFPGA |
321 | bool "XTFPGA" | |
61e47e9b | 322 | select ETHOC if ETHERNET |
0d456bad | 323 | select SERIAL_CONSOLE |
0d456bad MF |
324 | select XTENSA_CALIBRATE_CCOUNT |
325 | help | |
326 | XTFPGA is the name of Tensilica board family (LX60, LX110, LX200, ML605). | |
327 | This hardware is capable of running a full Linux distribution. | |
328 | ||
8e1a6dd2 CZ |
329 | endchoice |
330 | ||
331 | ||
8e1a6dd2 CZ |
332 | config XTENSA_CPU_CLOCK |
333 | int "CPU clock rate [MHz]" | |
334 | depends on !XTENSA_CALIBRATE_CCOUNT | |
35f9cd08 | 335 | default 16 |
8e1a6dd2 CZ |
336 | |
337 | config GENERIC_CALIBRATE_DELAY | |
338 | bool "Auto calibration of the BogoMIPS value" | |
35f9cd08 | 339 | help |
82300bf4 | 340 | The BogoMIPS value can easily be derived from the CPU frequency. |
8e1a6dd2 CZ |
341 | |
342 | config CMDLINE_BOOL | |
343 | bool "Default bootloader kernel arguments" | |
344 | ||
345 | config CMDLINE | |
346 | string "Initial kernel command string" | |
347 | depends on CMDLINE_BOOL | |
348 | default "console=ttyS0,38400 root=/dev/ram" | |
349 | help | |
350 | On some architectures (EBSA110 and CATS), there is currently no way | |
351 | for the boot loader to pass arguments to the kernel. For these | |
352 | architectures, you should supply some command-line options at build | |
353 | time by entering them here. As a minimum, you should specify the | |
354 | memory size and the root device (e.g., mem=64M root=/dev/nfs). | |
355 | ||
da844a81 MF |
356 | config USE_OF |
357 | bool "Flattened Device Tree support" | |
358 | select OF | |
359 | select OF_EARLY_FLATTREE | |
360 | help | |
361 | Include support for flattened device tree machine descriptions. | |
362 | ||
363 | config BUILTIN_DTB | |
364 | string "DTB to build into the kernel image" | |
365 | depends on OF | |
366 | ||
b6c7e873 VP |
367 | config BLK_DEV_SIMDISK |
368 | tristate "Host file-based simulated block device support" | |
369 | default n | |
7a0684cd | 370 | depends on XTENSA_PLATFORM_ISS && BLOCK |
b6c7e873 VP |
371 | help |
372 | Create block devices that map to files in the host file system. | |
373 | Device binding to host file may be changed at runtime via proc | |
374 | interface provided the device is not in use. | |
375 | ||
376 | config BLK_DEV_SIMDISK_COUNT | |
377 | int "Number of host file-based simulated block devices" | |
378 | range 1 10 | |
379 | depends on BLK_DEV_SIMDISK | |
380 | default 2 | |
381 | help | |
382 | This is the default minimal number of created block devices. | |
383 | Kernel/module parameter 'simdisk_count' may be used to change this | |
384 | value at runtime. More file names (but no more than 10) may be | |
385 | specified as parameters, simdisk_count grows accordingly. | |
386 | ||
387 | config SIMDISK0_FILENAME | |
388 | string "Host filename for the first simulated device" | |
389 | depends on BLK_DEV_SIMDISK = y | |
390 | default "" | |
391 | help | |
392 | Attach a first simdisk to a host file. Conventionally, this file | |
393 | contains a root file system. | |
394 | ||
395 | config SIMDISK1_FILENAME | |
396 | string "Host filename for the second simulated device" | |
397 | depends on BLK_DEV_SIMDISK = y && BLK_DEV_SIMDISK_COUNT != 1 | |
398 | default "" | |
399 | help | |
400 | Another simulated disk in a host file for a buildroot-independent | |
401 | storage. | |
402 | ||
82300bf4 CZ |
403 | source "mm/Kconfig" |
404 | ||
8e1a6dd2 CZ |
405 | source "drivers/pcmcia/Kconfig" |
406 | ||
407 | source "drivers/pci/hotplug/Kconfig" | |
408 | ||
409 | endmenu | |
410 | ||
cab00891 | 411 | menu "Executable file formats" |
8e1a6dd2 | 412 | |
8e1a6dd2 CZ |
413 | source "fs/Kconfig.binfmt" |
414 | ||
415 | endmenu | |
416 | ||
d5950b43 SR |
417 | source "net/Kconfig" |
418 | ||
8e1a6dd2 CZ |
419 | source "drivers/Kconfig" |
420 | ||
421 | source "fs/Kconfig" | |
422 | ||
8e1a6dd2 CZ |
423 | source "arch/xtensa/Kconfig.debug" |
424 | ||
425 | source "security/Kconfig" | |
426 | ||
427 | source "crypto/Kconfig" | |
428 | ||
429 | source "lib/Kconfig" | |
430 | ||
431 |