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cfdbc2e1 VG |
1 | # |
2 | # Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) | |
3 | # | |
4 | # This program is free software; you can redistribute it and/or modify | |
5 | # it under the terms of the GNU General Public License version 2 as | |
6 | # published by the Free Software Foundation. | |
7 | # | |
8 | ||
9 | config ARC | |
10 | def_bool y | |
f06d19e4 | 11 | select BUILDTIME_EXTABLE_SORT |
d7f8a085 | 12 | select COMMON_CLK |
4adeefe1 | 13 | select CLONE_BACKWARDS |
cfdbc2e1 VG |
14 | # ARC Busybox based initramfs absolutely relies on DEVTMPFS for /dev |
15 | select DEVTMPFS if !INITRAMFS_SOURCE="" | |
16 | select GENERIC_ATOMIC64 | |
17 | select GENERIC_CLOCKEVENTS | |
18 | select GENERIC_FIND_FIRST_BIT | |
19 | # for now, we don't need GENERIC_IRQ_PROBE, CONFIG_GENERIC_IRQ_CHIP | |
20 | select GENERIC_IRQ_SHOW | |
21 | select GENERIC_PENDING_IRQ if SMP | |
22 | select GENERIC_SMP_IDLE_THREAD | |
f46121bd | 23 | select HAVE_ARCH_KGDB |
547f1125 | 24 | select HAVE_ARCH_TRACEHOOK |
4368902b | 25 | select HAVE_IOREMAP_PROT |
4d86dfbb VG |
26 | select HAVE_KPROBES |
27 | select HAVE_KRETPROBES | |
c121c506 | 28 | select HAVE_MEMBLOCK |
854a0d95 | 29 | select HAVE_MOD_ARCH_SPECIFIC if ARC_DW2_UNWIND |
769bc1fd | 30 | select HAVE_OPROFILE |
9c57564e | 31 | select HAVE_PERF_EVENTS |
999159a5 | 32 | select IRQ_DOMAIN |
cfdbc2e1 | 33 | select MODULES_USE_ELF_RELA |
c121c506 | 34 | select NO_BOOTMEM |
999159a5 VG |
35 | select OF |
36 | select OF_EARLY_FLATTREE | |
9c57564e | 37 | select PERF_USE_VMALLOC |
d1a1dc0b | 38 | select HAVE_DEBUG_STACKOVERFLOW |
cfdbc2e1 | 39 | |
0dafafc3 VG |
40 | config TRACE_IRQFLAGS_SUPPORT |
41 | def_bool y | |
42 | ||
43 | config LOCKDEP_SUPPORT | |
44 | def_bool y | |
45 | ||
cfdbc2e1 VG |
46 | config SCHED_OMIT_FRAME_POINTER |
47 | def_bool y | |
48 | ||
49 | config GENERIC_CSUM | |
50 | def_bool y | |
51 | ||
52 | config RWSEM_GENERIC_SPINLOCK | |
53 | def_bool y | |
54 | ||
55 | config ARCH_FLATMEM_ENABLE | |
56 | def_bool y | |
57 | ||
58 | config MMU | |
59 | def_bool y | |
60 | ||
ce816fa8 | 61 | config NO_IOPORT_MAP |
cfdbc2e1 VG |
62 | def_bool y |
63 | ||
64 | config GENERIC_CALIBRATE_DELAY | |
65 | def_bool y | |
66 | ||
67 | config GENERIC_HWEIGHT | |
68 | def_bool y | |
69 | ||
44c8bb91 VG |
70 | config STACKTRACE_SUPPORT |
71 | def_bool y | |
72 | select STACKTRACE | |
73 | ||
cfdbc2e1 VG |
74 | config HAVE_LATENCYTOP_SUPPORT |
75 | def_bool y | |
76 | ||
cfdbc2e1 VG |
77 | source "init/Kconfig" |
78 | source "kernel/Kconfig.freezer" | |
79 | ||
80 | menu "ARC Architecture Configuration" | |
81 | ||
93ad700d | 82 | menu "ARC Platform/SoC/Board" |
cfdbc2e1 | 83 | |
fd155792 | 84 | source "arch/arc/plat-sim/Kconfig" |
072eb693 | 85 | source "arch/arc/plat-tb10x/Kconfig" |
556cc1c5 | 86 | source "arch/arc/plat-axs10x/Kconfig" |
cfdbc2e1 | 87 | #New platform adds here |
93ad700d | 88 | |
53d98958 | 89 | endmenu |
cfdbc2e1 VG |
90 | |
91 | menu "ARC CPU Configuration" | |
92 | ||
93 | choice | |
94 | prompt "ARC Core" | |
95 | default ARC_CPU_770 | |
96 | ||
97 | config ARC_CPU_750D | |
98 | bool "ARC750D" | |
99 | help | |
100 | Support for ARC750 core | |
101 | ||
102 | config ARC_CPU_770 | |
103 | bool "ARC770" | |
742f8af6 | 104 | select ARC_HAS_SWAPE |
cfdbc2e1 VG |
105 | help |
106 | Support for ARC770 core introduced with Rel 4.10 (Summer 2011) | |
107 | This core has a bunch of cool new features: | |
108 | -MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4) | |
109 | Shared Address Spaces (for sharing TLB entires in MMU) | |
110 | -Caches: New Prog Model, Region Flush | |
111 | -Insns: endian swap, load-locked/store-conditional, time-stamp-ctr | |
112 | ||
113 | endchoice | |
114 | ||
115 | config CPU_BIG_ENDIAN | |
116 | bool "Enable Big Endian Mode" | |
117 | default n | |
118 | help | |
119 | Build kernel for Big Endian Mode of ARC CPU | |
120 | ||
41195d23 VG |
121 | config SMP |
122 | bool "Symmetric Multi-Processing (Incomplete)" | |
123 | default n | |
41195d23 VG |
124 | help |
125 | This enables support for systems with more than one CPU. If you have | |
4a474157 RG |
126 | a system with only one CPU, say N. If you have a system with more |
127 | than one CPU, say Y. | |
41195d23 VG |
128 | |
129 | if SMP | |
130 | ||
131 | config ARC_HAS_COH_CACHES | |
132 | def_bool n | |
133 | ||
41195d23 VG |
134 | config ARC_HAS_REENTRANT_IRQ_LV2 |
135 | def_bool n | |
136 | ||
137 | endif | |
138 | ||
139 | config NR_CPUS | |
3aa4f80e NC |
140 | int "Maximum number of CPUs (2-4096)" |
141 | range 2 4096 | |
41195d23 VG |
142 | depends on SMP |
143 | default "2" | |
144 | ||
cfdbc2e1 VG |
145 | menuconfig ARC_CACHE |
146 | bool "Enable Cache Support" | |
147 | default y | |
41195d23 VG |
148 | # if SMP, cache enabled ONLY if ARC implementation has cache coherency |
149 | depends on !SMP || ARC_HAS_COH_CACHES | |
cfdbc2e1 VG |
150 | |
151 | if ARC_CACHE | |
152 | ||
153 | config ARC_CACHE_LINE_SHIFT | |
154 | int "Cache Line Length (as power of 2)" | |
155 | range 5 7 | |
156 | default "6" | |
157 | help | |
158 | Starting with ARC700 4.9, Cache line length is configurable, | |
159 | This option specifies "N", with Line-len = 2 power N | |
160 | So line lengths of 32, 64, 128 are specified by 5,6,7, respectively | |
161 | Linux only supports same line lengths for I and D caches. | |
162 | ||
163 | config ARC_HAS_ICACHE | |
164 | bool "Use Instruction Cache" | |
165 | default y | |
166 | ||
167 | config ARC_HAS_DCACHE | |
168 | bool "Use Data Cache" | |
169 | default y | |
170 | ||
171 | config ARC_CACHE_PAGES | |
172 | bool "Per Page Cache Control" | |
173 | default y | |
174 | depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE | |
175 | help | |
176 | This can be used to over-ride the global I/D Cache Enable on a | |
177 | per-page basis (but only for pages accessed via MMU such as | |
178 | Kernel Virtual address or User Virtual Address) | |
179 | TLB entries have a per-page Cache Enable Bit. | |
180 | Note that Global I/D ENABLE + Per Page DISABLE works but corollary | |
181 | Global DISABLE + Per Page ENABLE won't work | |
182 | ||
4102b533 VG |
183 | config ARC_CACHE_VIPT_ALIASING |
184 | bool "Support VIPT Aliasing D$" | |
2f9e9961 | 185 | depends on ARC_HAS_DCACHE |
4102b533 VG |
186 | default n |
187 | ||
cfdbc2e1 VG |
188 | endif #ARC_CACHE |
189 | ||
8b5850f8 VG |
190 | config ARC_HAS_ICCM |
191 | bool "Use ICCM" | |
192 | help | |
193 | Single Cycle RAMS to store Fast Path Code | |
194 | default n | |
195 | ||
196 | config ARC_ICCM_SZ | |
197 | int "ICCM Size in KB" | |
198 | default "64" | |
199 | depends on ARC_HAS_ICCM | |
200 | ||
201 | config ARC_HAS_DCCM | |
202 | bool "Use DCCM" | |
203 | help | |
204 | Single Cycle RAMS to store Fast Path Data | |
205 | default n | |
206 | ||
207 | config ARC_DCCM_SZ | |
208 | int "DCCM Size in KB" | |
209 | default "64" | |
210 | depends on ARC_HAS_DCCM | |
211 | ||
212 | config ARC_DCCM_BASE | |
213 | hex "DCCM map address" | |
214 | default "0xA0000000" | |
215 | depends on ARC_HAS_DCCM | |
216 | ||
cfdbc2e1 VG |
217 | config ARC_HAS_HW_MPY |
218 | bool "Use Hardware Multiplier (Normal or Faster XMAC)" | |
219 | default y | |
220 | help | |
221 | Influences how gcc generates code for MPY operations. | |
222 | If enabled, MPYxx insns are generated, provided by Standard/XMAC | |
223 | Multipler. Otherwise software multipy lib is used | |
224 | ||
225 | choice | |
226 | prompt "ARC700 MMU Version" | |
227 | default ARC_MMU_V3 if ARC_CPU_770 | |
228 | default ARC_MMU_V2 if ARC_CPU_750D | |
229 | ||
230 | config ARC_MMU_V1 | |
231 | bool "MMU v1" | |
232 | help | |
233 | Orig ARC700 MMU | |
234 | ||
235 | config ARC_MMU_V2 | |
236 | bool "MMU v2" | |
237 | help | |
238 | Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio | |
239 | when 2 D-TLB and 1 I-TLB entries index into same 2way set. | |
240 | ||
241 | config ARC_MMU_V3 | |
242 | bool "MMU v3" | |
243 | depends on ARC_CPU_770 | |
244 | help | |
245 | Introduced with ARC700 4.10: New Features | |
246 | Variable Page size (1k-16k), var JTLB size 128 x (2 or 4) | |
247 | Shared Address Spaces (SASID) | |
248 | ||
249 | endchoice | |
250 | ||
251 | ||
252 | choice | |
253 | prompt "MMU Page Size" | |
254 | default ARC_PAGE_SIZE_8K | |
255 | ||
256 | config ARC_PAGE_SIZE_8K | |
257 | bool "8KB" | |
258 | help | |
259 | Choose between 8k vs 16k | |
260 | ||
261 | config ARC_PAGE_SIZE_16K | |
262 | bool "16KB" | |
263 | depends on ARC_MMU_V3 | |
264 | ||
265 | config ARC_PAGE_SIZE_4K | |
266 | bool "4KB" | |
267 | depends on ARC_MMU_V3 | |
268 | ||
269 | endchoice | |
270 | ||
4788a594 VG |
271 | config ARC_COMPACT_IRQ_LEVELS |
272 | bool "ARCompact IRQ Priorities: High(2)/Low(1)" | |
273 | default n | |
274 | # Timer HAS to be high priority, for any other high priority config | |
275 | select ARC_IRQ3_LV2 | |
41195d23 VG |
276 | # if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy |
277 | depends on !SMP || ARC_HAS_REENTRANT_IRQ_LV2 | |
4788a594 VG |
278 | |
279 | if ARC_COMPACT_IRQ_LEVELS | |
280 | ||
281 | config ARC_IRQ3_LV2 | |
282 | bool | |
283 | ||
284 | config ARC_IRQ5_LV2 | |
285 | bool | |
286 | ||
287 | config ARC_IRQ6_LV2 | |
288 | bool | |
289 | ||
290 | endif | |
291 | ||
cfdbc2e1 VG |
292 | config ARC_FPU_SAVE_RESTORE |
293 | bool "Enable FPU state persistence across context switch" | |
294 | default n | |
295 | help | |
296 | Double Precision Floating Point unit had dedictaed regs which | |
297 | need to be saved/restored across context-switch. | |
298 | Note that ARC FPU is overly simplistic, unlike say x86, which has | |
299 | hardware pieces to allow software to conditionally save/restore, | |
300 | based on actual usage of FPU by a task. Thus our implemn does | |
301 | this for all tasks in system. | |
302 | ||
fbf8e13d VG |
303 | config ARC_CANT_LLSC |
304 | def_bool n | |
305 | ||
cfdbc2e1 VG |
306 | config ARC_HAS_LLSC |
307 | bool "Insn: LLOCK/SCOND (efficient atomic ops)" | |
308 | default y | |
fbf8e13d | 309 | depends on ARC_CPU_770 && !ARC_CANT_LLSC |
cfdbc2e1 VG |
310 | |
311 | config ARC_HAS_SWAPE | |
312 | bool "Insn: SWAPE (endian-swap)" | |
313 | default y | |
cfdbc2e1 | 314 | |
cfdbc2e1 VG |
315 | endmenu # "ARC CPU Configuration" |
316 | ||
cfdbc2e1 VG |
317 | config LINUX_LINK_BASE |
318 | hex "Linux Link Address" | |
319 | default "0x80000000" | |
320 | help | |
321 | ARC700 divides the 32 bit phy address space into two equal halves | |
322 | -Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU | |
323 | -Upper 2G (0x8000_0000 onwards) is untranslated, for kernel | |
324 | Typically Linux kernel is linked at the start of untransalted addr, | |
325 | hence the default value of 0x8zs. | |
326 | However some customers have peripherals mapped at this addr, so | |
327 | Linux needs to be scooted a bit. | |
328 | If you don't know what the above means, leave this setting alone. | |
329 | ||
080c3747 VG |
330 | config ARC_CURR_IN_REG |
331 | bool "Dedicate Register r25 for current_task pointer" | |
332 | default y | |
333 | help | |
334 | This reserved Register R25 to point to Current Task in | |
335 | kernel mode. This saves memory access for each such access | |
336 | ||
2e651ea1 | 337 | |
1736a56f | 338 | config ARC_EMUL_UNALIGNED |
2e651ea1 | 339 | bool "Emulate unaligned memory access (userspace only)" |
2e651ea1 VG |
340 | select SYSCTL_ARCH_UNALIGN_NO_WARN |
341 | select SYSCTL_ARCH_UNALIGN_ALLOW | |
342 | help | |
343 | This enables misaligned 16 & 32 bit memory access from user space. | |
344 | Use ONLY-IF-ABS-NECESSARY as it will be very slow and also can hide | |
345 | potential bugs in code | |
346 | ||
cfdbc2e1 VG |
347 | config HZ |
348 | int "Timer Frequency" | |
349 | default 100 | |
350 | ||
cbe056f7 VG |
351 | config ARC_METAWARE_HLINK |
352 | bool "Support for Metaware debugger assisted Host access" | |
353 | default n | |
354 | help | |
355 | This options allows a Linux userland apps to directly access | |
356 | host file system (open/creat/read/write etc) with help from | |
357 | Metaware Debugger. This can come in handy for Linux-host communication | |
358 | when there is no real usable peripheral such as EMAC. | |
359 | ||
cfdbc2e1 VG |
360 | menuconfig ARC_DBG |
361 | bool "ARC debugging" | |
362 | default y | |
363 | ||
854a0d95 VG |
364 | config ARC_DW2_UNWIND |
365 | bool "Enable DWARF specific kernel stack unwind" | |
366 | depends on ARC_DBG | |
367 | default y | |
368 | select KALLSYMS | |
369 | help | |
370 | Compiles the kernel with DWARF unwind information and can be used | |
371 | to get stack backtraces. | |
372 | ||
373 | If you say Y here the resulting kernel image will be slightly larger | |
374 | but not slower, and it will give very useful debugging information. | |
375 | If you don't debug the kernel, you can say N, but we may not be able | |
376 | to solve problems without frame unwind information | |
377 | ||
cfdbc2e1 VG |
378 | config ARC_DBG_TLB_PARANOIA |
379 | bool "Paranoia Checks in Low Level TLB Handlers" | |
f46121bd | 380 | depends on ARC_DBG |
cfdbc2e1 VG |
381 | default n |
382 | ||
383 | config ARC_DBG_TLB_MISS_COUNT | |
384 | bool "Profile TLB Misses" | |
385 | default n | |
386 | select DEBUG_FS | |
387 | depends on ARC_DBG | |
388 | help | |
389 | Counts number of I and D TLB Misses and exports them via Debugfs | |
390 | The counters can be cleared via Debugfs as well | |
391 | ||
036b2c56 VG |
392 | config ARC_UBOOT_SUPPORT |
393 | bool "Support uboot arg Handling" | |
394 | default n | |
395 | help | |
396 | ARC Linux by default checks for uboot provided args as pointers to | |
397 | external cmdline or DTB. This however breaks in absence of uboot, | |
398 | when booting from Metaware debugger directly, as the registers are | |
399 | not zeroed out on reset by mdb and/or ARCv2 based cores. The bogus | |
400 | registers look like uboot args to kernel which then chokes. | |
401 | So only enable the uboot arg checking/processing if users are sure | |
402 | of uboot being in play. | |
403 | ||
999159a5 VG |
404 | config ARC_BUILTIN_DTB_NAME |
405 | string "Built in DTB" | |
406 | help | |
407 | Set the name of the DTB to embed in the vmlinux binary | |
408 | Leaving it blank selects the minimal "skeleton" dtb | |
409 | ||
cfdbc2e1 VG |
410 | source "kernel/Kconfig.preempt" |
411 | ||
5628832f VG |
412 | menu "Executable file formats" |
413 | source "fs/Kconfig.binfmt" | |
414 | endmenu | |
415 | ||
cfdbc2e1 VG |
416 | endmenu # "ARC Architecture Configuration" |
417 | ||
418 | source "mm/Kconfig" | |
419 | source "net/Kconfig" | |
420 | source "drivers/Kconfig" | |
421 | source "fs/Kconfig" | |
422 | source "arch/arc/Kconfig.debug" | |
423 | source "security/Kconfig" | |
424 | source "crypto/Kconfig" | |
425 | source "lib/Kconfig" | |
996bad6c | 426 | source "kernel/power/Kconfig" |