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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 | |
4adeefe1 | 11 | select CLONE_BACKWARDS |
cfdbc2e1 VG |
12 | # ARC Busybox based initramfs absolutely relies on DEVTMPFS for /dev |
13 | select DEVTMPFS if !INITRAMFS_SOURCE="" | |
14 | select GENERIC_ATOMIC64 | |
15 | select GENERIC_CLOCKEVENTS | |
16 | select GENERIC_FIND_FIRST_BIT | |
17 | # for now, we don't need GENERIC_IRQ_PROBE, CONFIG_GENERIC_IRQ_CHIP | |
18 | select GENERIC_IRQ_SHOW | |
bf90e1ea VG |
19 | select GENERIC_KERNEL_EXECVE |
20 | select GENERIC_KERNEL_THREAD | |
cfdbc2e1 VG |
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 |
cfdbc2e1 | 25 | select HAVE_GENERIC_HARDIRQS |
4368902b | 26 | select HAVE_IOREMAP_PROT |
4d86dfbb VG |
27 | select HAVE_KPROBES |
28 | select HAVE_KRETPROBES | |
c121c506 | 29 | select HAVE_MEMBLOCK |
854a0d95 | 30 | select HAVE_MOD_ARCH_SPECIFIC if ARC_DW2_UNWIND |
769bc1fd | 31 | select HAVE_OPROFILE |
9c57564e | 32 | select HAVE_PERF_EVENTS |
999159a5 | 33 | select IRQ_DOMAIN |
cfdbc2e1 | 34 | select MODULES_USE_ELF_RELA |
c121c506 | 35 | select NO_BOOTMEM |
999159a5 VG |
36 | select OF |
37 | select OF_EARLY_FLATTREE | |
9c57564e | 38 | select PERF_USE_VMALLOC |
cfdbc2e1 VG |
39 | |
40 | config SCHED_OMIT_FRAME_POINTER | |
41 | def_bool y | |
42 | ||
43 | config GENERIC_CSUM | |
44 | def_bool y | |
45 | ||
46 | config RWSEM_GENERIC_SPINLOCK | |
47 | def_bool y | |
48 | ||
49 | config ARCH_FLATMEM_ENABLE | |
50 | def_bool y | |
51 | ||
52 | config MMU | |
53 | def_bool y | |
54 | ||
55 | config NO_IOPORT | |
56 | def_bool y | |
57 | ||
58 | config GENERIC_CALIBRATE_DELAY | |
59 | def_bool y | |
60 | ||
61 | config GENERIC_HWEIGHT | |
62 | def_bool y | |
63 | ||
64 | config BINFMT_ELF | |
65 | def_bool y | |
66 | ||
44c8bb91 VG |
67 | config STACKTRACE_SUPPORT |
68 | def_bool y | |
69 | select STACKTRACE | |
70 | ||
cfdbc2e1 VG |
71 | config HAVE_LATENCYTOP_SUPPORT |
72 | def_bool y | |
73 | ||
74 | config NO_DMA | |
75 | def_bool n | |
76 | ||
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 | |
93ad700d | 84 | source "arch/arc/plat-arcfpga/Kconfig" |
cfdbc2e1 | 85 | #New platform adds here |
93ad700d | 86 | |
53d98958 | 87 | endmenu |
cfdbc2e1 VG |
88 | |
89 | menu "ARC CPU Configuration" | |
90 | ||
91 | choice | |
92 | prompt "ARC Core" | |
93 | default ARC_CPU_770 | |
94 | ||
95 | config ARC_CPU_750D | |
96 | bool "ARC750D" | |
97 | help | |
98 | Support for ARC750 core | |
99 | ||
100 | config ARC_CPU_770 | |
101 | bool "ARC770" | |
102 | select ARC_CPU_REL_4_10 | |
103 | help | |
104 | Support for ARC770 core introduced with Rel 4.10 (Summer 2011) | |
105 | This core has a bunch of cool new features: | |
106 | -MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4) | |
107 | Shared Address Spaces (for sharing TLB entires in MMU) | |
108 | -Caches: New Prog Model, Region Flush | |
109 | -Insns: endian swap, load-locked/store-conditional, time-stamp-ctr | |
110 | ||
111 | endchoice | |
112 | ||
113 | config CPU_BIG_ENDIAN | |
114 | bool "Enable Big Endian Mode" | |
115 | default n | |
116 | help | |
117 | Build kernel for Big Endian Mode of ARC CPU | |
118 | ||
fc7943d2 VG |
119 | # If a platform can't work with 0x8000_0000 based dma_addr_t |
120 | config ARC_PLAT_NEEDS_CPU_TO_DMA | |
121 | bool | |
122 | ||
41195d23 VG |
123 | config SMP |
124 | bool "Symmetric Multi-Processing (Incomplete)" | |
125 | default n | |
126 | select USE_GENERIC_SMP_HELPERS | |
127 | help | |
128 | This enables support for systems with more than one CPU. If you have | |
129 | a system with only one CPU, like most personal computers, say N. If | |
130 | you have a system with more than one CPU, say Y. | |
131 | ||
132 | if SMP | |
133 | ||
134 | config ARC_HAS_COH_CACHES | |
135 | def_bool n | |
136 | ||
137 | config ARC_HAS_COH_LLSC | |
138 | def_bool n | |
139 | ||
140 | config ARC_HAS_COH_RTSC | |
141 | def_bool n | |
142 | ||
143 | config ARC_HAS_REENTRANT_IRQ_LV2 | |
144 | def_bool n | |
145 | ||
146 | endif | |
147 | ||
148 | config NR_CPUS | |
149 | int "Maximum number of CPUs (2-32)" | |
150 | range 2 32 | |
151 | depends on SMP | |
152 | default "2" | |
153 | ||
cfdbc2e1 VG |
154 | menuconfig ARC_CACHE |
155 | bool "Enable Cache Support" | |
156 | default y | |
41195d23 VG |
157 | # if SMP, cache enabled ONLY if ARC implementation has cache coherency |
158 | depends on !SMP || ARC_HAS_COH_CACHES | |
cfdbc2e1 VG |
159 | |
160 | if ARC_CACHE | |
161 | ||
162 | config ARC_CACHE_LINE_SHIFT | |
163 | int "Cache Line Length (as power of 2)" | |
164 | range 5 7 | |
165 | default "6" | |
166 | help | |
167 | Starting with ARC700 4.9, Cache line length is configurable, | |
168 | This option specifies "N", with Line-len = 2 power N | |
169 | So line lengths of 32, 64, 128 are specified by 5,6,7, respectively | |
170 | Linux only supports same line lengths for I and D caches. | |
171 | ||
172 | config ARC_HAS_ICACHE | |
173 | bool "Use Instruction Cache" | |
174 | default y | |
175 | ||
176 | config ARC_HAS_DCACHE | |
177 | bool "Use Data Cache" | |
178 | default y | |
179 | ||
180 | config ARC_CACHE_PAGES | |
181 | bool "Per Page Cache Control" | |
182 | default y | |
183 | depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE | |
184 | help | |
185 | This can be used to over-ride the global I/D Cache Enable on a | |
186 | per-page basis (but only for pages accessed via MMU such as | |
187 | Kernel Virtual address or User Virtual Address) | |
188 | TLB entries have a per-page Cache Enable Bit. | |
189 | Note that Global I/D ENABLE + Per Page DISABLE works but corollary | |
190 | Global DISABLE + Per Page ENABLE won't work | |
191 | ||
192 | endif #ARC_CACHE | |
193 | ||
8b5850f8 VG |
194 | config ARC_HAS_ICCM |
195 | bool "Use ICCM" | |
196 | help | |
197 | Single Cycle RAMS to store Fast Path Code | |
198 | default n | |
199 | ||
200 | config ARC_ICCM_SZ | |
201 | int "ICCM Size in KB" | |
202 | default "64" | |
203 | depends on ARC_HAS_ICCM | |
204 | ||
205 | config ARC_HAS_DCCM | |
206 | bool "Use DCCM" | |
207 | help | |
208 | Single Cycle RAMS to store Fast Path Data | |
209 | default n | |
210 | ||
211 | config ARC_DCCM_SZ | |
212 | int "DCCM Size in KB" | |
213 | default "64" | |
214 | depends on ARC_HAS_DCCM | |
215 | ||
216 | config ARC_DCCM_BASE | |
217 | hex "DCCM map address" | |
218 | default "0xA0000000" | |
219 | depends on ARC_HAS_DCCM | |
220 | ||
cfdbc2e1 VG |
221 | config ARC_HAS_HW_MPY |
222 | bool "Use Hardware Multiplier (Normal or Faster XMAC)" | |
223 | default y | |
224 | help | |
225 | Influences how gcc generates code for MPY operations. | |
226 | If enabled, MPYxx insns are generated, provided by Standard/XMAC | |
227 | Multipler. Otherwise software multipy lib is used | |
228 | ||
229 | choice | |
230 | prompt "ARC700 MMU Version" | |
231 | default ARC_MMU_V3 if ARC_CPU_770 | |
232 | default ARC_MMU_V2 if ARC_CPU_750D | |
233 | ||
234 | config ARC_MMU_V1 | |
235 | bool "MMU v1" | |
236 | help | |
237 | Orig ARC700 MMU | |
238 | ||
239 | config ARC_MMU_V2 | |
240 | bool "MMU v2" | |
241 | help | |
242 | Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio | |
243 | when 2 D-TLB and 1 I-TLB entries index into same 2way set. | |
244 | ||
245 | config ARC_MMU_V3 | |
246 | bool "MMU v3" | |
247 | depends on ARC_CPU_770 | |
248 | help | |
249 | Introduced with ARC700 4.10: New Features | |
250 | Variable Page size (1k-16k), var JTLB size 128 x (2 or 4) | |
251 | Shared Address Spaces (SASID) | |
252 | ||
253 | endchoice | |
254 | ||
255 | ||
256 | choice | |
257 | prompt "MMU Page Size" | |
258 | default ARC_PAGE_SIZE_8K | |
259 | ||
260 | config ARC_PAGE_SIZE_8K | |
261 | bool "8KB" | |
262 | help | |
263 | Choose between 8k vs 16k | |
264 | ||
265 | config ARC_PAGE_SIZE_16K | |
266 | bool "16KB" | |
267 | depends on ARC_MMU_V3 | |
268 | ||
269 | config ARC_PAGE_SIZE_4K | |
270 | bool "4KB" | |
271 | depends on ARC_MMU_V3 | |
272 | ||
273 | endchoice | |
274 | ||
4788a594 VG |
275 | config ARC_COMPACT_IRQ_LEVELS |
276 | bool "ARCompact IRQ Priorities: High(2)/Low(1)" | |
277 | default n | |
278 | # Timer HAS to be high priority, for any other high priority config | |
279 | select ARC_IRQ3_LV2 | |
41195d23 VG |
280 | # if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy |
281 | depends on !SMP || ARC_HAS_REENTRANT_IRQ_LV2 | |
4788a594 VG |
282 | |
283 | if ARC_COMPACT_IRQ_LEVELS | |
284 | ||
285 | config ARC_IRQ3_LV2 | |
286 | bool | |
287 | ||
288 | config ARC_IRQ5_LV2 | |
289 | bool | |
290 | ||
291 | config ARC_IRQ6_LV2 | |
292 | bool | |
293 | ||
294 | endif | |
295 | ||
cfdbc2e1 VG |
296 | config ARC_FPU_SAVE_RESTORE |
297 | bool "Enable FPU state persistence across context switch" | |
298 | default n | |
299 | help | |
300 | Double Precision Floating Point unit had dedictaed regs which | |
301 | need to be saved/restored across context-switch. | |
302 | Note that ARC FPU is overly simplistic, unlike say x86, which has | |
303 | hardware pieces to allow software to conditionally save/restore, | |
304 | based on actual usage of FPU by a task. Thus our implemn does | |
305 | this for all tasks in system. | |
306 | ||
307 | menuconfig ARC_CPU_REL_4_10 | |
308 | bool "Enable support for Rel 4.10 features" | |
309 | default n | |
310 | help | |
311 | -ARC770 (and dependent features) enabled | |
312 | -ARC750 also shares some of the new features with 770 | |
313 | ||
314 | config ARC_HAS_LLSC | |
315 | bool "Insn: LLOCK/SCOND (efficient atomic ops)" | |
316 | default y | |
317 | depends on ARC_CPU_770 | |
318 | # if SMP, enable LLSC ONLY if ARC implementation has coherent atomics | |
319 | depends on !SMP || ARC_HAS_COH_LLSC | |
320 | ||
321 | config ARC_HAS_SWAPE | |
322 | bool "Insn: SWAPE (endian-swap)" | |
323 | default y | |
324 | depends on ARC_CPU_REL_4_10 | |
325 | ||
326 | config ARC_HAS_RTSC | |
327 | bool "Insn: RTSC (64-bit r/o cycle counter)" | |
328 | default y | |
329 | depends on ARC_CPU_REL_4_10 | |
41195d23 VG |
330 | # if SMP, enable RTSC only if counter is coherent across cores |
331 | depends on !SMP || ARC_HAS_COH_RTSC | |
cfdbc2e1 VG |
332 | |
333 | endmenu # "ARC CPU Configuration" | |
334 | ||
cfdbc2e1 VG |
335 | config LINUX_LINK_BASE |
336 | hex "Linux Link Address" | |
337 | default "0x80000000" | |
338 | help | |
339 | ARC700 divides the 32 bit phy address space into two equal halves | |
340 | -Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU | |
341 | -Upper 2G (0x8000_0000 onwards) is untranslated, for kernel | |
342 | Typically Linux kernel is linked at the start of untransalted addr, | |
343 | hence the default value of 0x8zs. | |
344 | However some customers have peripherals mapped at this addr, so | |
345 | Linux needs to be scooted a bit. | |
346 | If you don't know what the above means, leave this setting alone. | |
347 | ||
080c3747 VG |
348 | config ARC_CURR_IN_REG |
349 | bool "Dedicate Register r25 for current_task pointer" | |
350 | default y | |
351 | help | |
352 | This reserved Register R25 to point to Current Task in | |
353 | kernel mode. This saves memory access for each such access | |
354 | ||
2e651ea1 VG |
355 | |
356 | config ARC_MISALIGN_ACCESS | |
357 | bool "Emulate unaligned memory access (userspace only)" | |
358 | default N | |
359 | select SYSCTL_ARCH_UNALIGN_NO_WARN | |
360 | select SYSCTL_ARCH_UNALIGN_ALLOW | |
361 | help | |
362 | This enables misaligned 16 & 32 bit memory access from user space. | |
363 | Use ONLY-IF-ABS-NECESSARY as it will be very slow and also can hide | |
364 | potential bugs in code | |
365 | ||
cfdbc2e1 VG |
366 | config ARC_STACK_NONEXEC |
367 | bool "Make stack non-executable" | |
368 | default n | |
369 | help | |
370 | To disable the execute permissions of stack/heap of processes | |
371 | which are enabled by default. | |
372 | ||
373 | config HZ | |
374 | int "Timer Frequency" | |
375 | default 100 | |
376 | ||
cbe056f7 VG |
377 | config ARC_METAWARE_HLINK |
378 | bool "Support for Metaware debugger assisted Host access" | |
379 | default n | |
380 | help | |
381 | This options allows a Linux userland apps to directly access | |
382 | host file system (open/creat/read/write etc) with help from | |
383 | Metaware Debugger. This can come in handy for Linux-host communication | |
384 | when there is no real usable peripheral such as EMAC. | |
385 | ||
cfdbc2e1 VG |
386 | menuconfig ARC_DBG |
387 | bool "ARC debugging" | |
388 | default y | |
389 | ||
854a0d95 VG |
390 | config ARC_DW2_UNWIND |
391 | bool "Enable DWARF specific kernel stack unwind" | |
392 | depends on ARC_DBG | |
393 | default y | |
394 | select KALLSYMS | |
395 | help | |
396 | Compiles the kernel with DWARF unwind information and can be used | |
397 | to get stack backtraces. | |
398 | ||
399 | If you say Y here the resulting kernel image will be slightly larger | |
400 | but not slower, and it will give very useful debugging information. | |
401 | If you don't debug the kernel, you can say N, but we may not be able | |
402 | to solve problems without frame unwind information | |
403 | ||
cfdbc2e1 VG |
404 | config ARC_DBG_TLB_PARANOIA |
405 | bool "Paranoia Checks in Low Level TLB Handlers" | |
f46121bd | 406 | depends on ARC_DBG |
cfdbc2e1 VG |
407 | default n |
408 | ||
409 | config ARC_DBG_TLB_MISS_COUNT | |
410 | bool "Profile TLB Misses" | |
411 | default n | |
412 | select DEBUG_FS | |
413 | depends on ARC_DBG | |
414 | help | |
415 | Counts number of I and D TLB Misses and exports them via Debugfs | |
416 | The counters can be cleared via Debugfs as well | |
417 | ||
418 | config CMDLINE | |
419 | string "Kernel command line to built-in" | |
420 | default "print-fatal-signals=1" | |
421 | help | |
422 | The default command line which will be appended to the optional | |
423 | u-boot provided command line (see below) | |
424 | ||
425 | config CMDLINE_UBOOT | |
426 | bool "Support U-boot kernel command line passing" | |
427 | default n | |
428 | help | |
429 | If you are using U-boot (www.denx.de) and wish to pass the kernel | |
430 | command line from the U-boot environment to the Linux kernel then | |
431 | switch this option on. | |
432 | ARC U-boot will setup the cmdline in RAM/flash and set r2 to point | |
433 | to it. kernel startup code will copy the string into cmdline buffer | |
434 | and also append CONFIG_CMDLINE. | |
435 | ||
999159a5 VG |
436 | config ARC_BUILTIN_DTB_NAME |
437 | string "Built in DTB" | |
438 | help | |
439 | Set the name of the DTB to embed in the vmlinux binary | |
440 | Leaving it blank selects the minimal "skeleton" dtb | |
441 | ||
cfdbc2e1 VG |
442 | source "kernel/Kconfig.preempt" |
443 | ||
444 | endmenu # "ARC Architecture Configuration" | |
445 | ||
446 | source "mm/Kconfig" | |
447 | source "net/Kconfig" | |
448 | source "drivers/Kconfig" | |
449 | source "fs/Kconfig" | |
450 | source "arch/arc/Kconfig.debug" | |
451 | source "security/Kconfig" | |
452 | source "crypto/Kconfig" | |
453 | source "lib/Kconfig" |