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Vineet Guptacfdbc2e2013-01-18 15:12:20 +05301#
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
9config ARC
10 def_bool y
Vineet Gupta4adeefe2013-01-18 15:12:18 +053011 select CLONE_BACKWARDS
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053012 # 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
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053019 select GENERIC_PENDING_IRQ if SMP
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053020 select GENERIC_SMP_IDLE_THREAD
Mischa Jonkerf46121b2013-01-18 15:12:24 +053021 select HAVE_ARCH_KGDB
Vineet Gupta547f1122013-01-18 15:12:22 +053022 select HAVE_ARCH_TRACEHOOK
Gilad Ben-Yossef43689022013-01-22 16:48:45 +053023 select HAVE_IOREMAP_PROT
Vineet Gupta4d86dfb2013-01-22 17:03:59 +053024 select HAVE_KPROBES
25 select HAVE_KRETPROBES
Vineet Guptac121c502013-01-18 15:12:20 +053026 select HAVE_MEMBLOCK
Vineet Gupta854a0d92013-01-22 17:03:19 +053027 select HAVE_MOD_ARCH_SPECIFIC if ARC_DW2_UNWIND
Vineet Gupta769bc1f2013-01-22 17:02:38 +053028 select HAVE_OPROFILE
Vineet Gupta9c575642013-01-18 15:12:24 +053029 select HAVE_PERF_EVENTS
Vineet Gupta999159a2013-01-22 17:00:52 +053030 select IRQ_DOMAIN
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053031 select MODULES_USE_ELF_RELA
Vineet Guptac121c502013-01-18 15:12:20 +053032 select NO_BOOTMEM
Vineet Gupta999159a2013-01-22 17:00:52 +053033 select OF
34 select OF_EARLY_FLATTREE
Vineet Gupta9c575642013-01-18 15:12:24 +053035 select PERF_USE_VMALLOC
Dave Hansend1a1dc02013-07-01 13:04:42 -070036 select HAVE_DEBUG_STACKOVERFLOW
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053037
38config SCHED_OMIT_FRAME_POINTER
39 def_bool y
40
41config GENERIC_CSUM
42 def_bool y
43
44config RWSEM_GENERIC_SPINLOCK
45 def_bool y
46
47config ARCH_FLATMEM_ENABLE
48 def_bool y
49
50config MMU
51 def_bool y
52
53config NO_IOPORT
54 def_bool y
55
56config GENERIC_CALIBRATE_DELAY
57 def_bool y
58
59config GENERIC_HWEIGHT
60 def_bool y
61
Vineet Gupta44c8bb92013-01-18 15:12:23 +053062config STACKTRACE_SUPPORT
63 def_bool y
64 select STACKTRACE
65
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053066config HAVE_LATENCYTOP_SUPPORT
67 def_bool y
68
69config NO_DMA
70 def_bool n
71
72source "init/Kconfig"
73source "kernel/Kconfig.freezer"
74
75menu "ARC Architecture Configuration"
76
Vineet Gupta93ad7002013-01-22 16:51:50 +053077menu "ARC Platform/SoC/Board"
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053078
Vineet Gupta93ad7002013-01-22 16:51:50 +053079source "arch/arc/plat-arcfpga/Kconfig"
Christian Ruppert072eb692013-04-12 08:40:59 +020080source "arch/arc/plat-tb10x/Kconfig"
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053081#New platform adds here
Vineet Gupta93ad7002013-01-22 16:51:50 +053082
Vineet Gupta53d98952013-01-18 15:12:25 +053083endmenu
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053084
85menu "ARC CPU Configuration"
86
87choice
88 prompt "ARC Core"
89 default ARC_CPU_770
90
91config ARC_CPU_750D
92 bool "ARC750D"
93 help
94 Support for ARC750 core
95
96config ARC_CPU_770
97 bool "ARC770"
98 select ARC_CPU_REL_4_10
99 help
100 Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
101 This core has a bunch of cool new features:
102 -MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4)
103 Shared Address Spaces (for sharing TLB entires in MMU)
104 -Caches: New Prog Model, Region Flush
105 -Insns: endian swap, load-locked/store-conditional, time-stamp-ctr
106
107endchoice
108
109config CPU_BIG_ENDIAN
110 bool "Enable Big Endian Mode"
111 default n
112 help
113 Build kernel for Big Endian Mode of ARC CPU
114
Vineet Guptafc7943d2013-01-22 16:53:57 +0530115# If a platform can't work with 0x8000_0000 based dma_addr_t
116config ARC_PLAT_NEEDS_CPU_TO_DMA
117 bool
118
Vineet Gupta41195d22013-01-18 15:12:23 +0530119config SMP
120 bool "Symmetric Multi-Processing (Incomplete)"
121 default n
122 select USE_GENERIC_SMP_HELPERS
123 help
124 This enables support for systems with more than one CPU. If you have
125 a system with only one CPU, like most personal computers, say N. If
126 you have a system with more than one CPU, say Y.
127
128if SMP
129
130config ARC_HAS_COH_CACHES
131 def_bool n
132
Vineet Gupta41195d22013-01-18 15:12:23 +0530133config ARC_HAS_COH_RTSC
134 def_bool n
135
136config ARC_HAS_REENTRANT_IRQ_LV2
137 def_bool n
138
139endif
140
141config NR_CPUS
142 int "Maximum number of CPUs (2-32)"
143 range 2 32
144 depends on SMP
145 default "2"
146
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530147menuconfig ARC_CACHE
148 bool "Enable Cache Support"
149 default y
Vineet Gupta41195d22013-01-18 15:12:23 +0530150 # if SMP, cache enabled ONLY if ARC implementation has cache coherency
151 depends on !SMP || ARC_HAS_COH_CACHES
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530152
153if ARC_CACHE
154
155config ARC_CACHE_LINE_SHIFT
156 int "Cache Line Length (as power of 2)"
157 range 5 7
158 default "6"
159 help
160 Starting with ARC700 4.9, Cache line length is configurable,
161 This option specifies "N", with Line-len = 2 power N
162 So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
163 Linux only supports same line lengths for I and D caches.
164
165config ARC_HAS_ICACHE
166 bool "Use Instruction Cache"
167 default y
168
169config ARC_HAS_DCACHE
170 bool "Use Data Cache"
171 default y
172
173config ARC_CACHE_PAGES
174 bool "Per Page Cache Control"
175 default y
176 depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE
177 help
178 This can be used to over-ride the global I/D Cache Enable on a
179 per-page basis (but only for pages accessed via MMU such as
180 Kernel Virtual address or User Virtual Address)
181 TLB entries have a per-page Cache Enable Bit.
182 Note that Global I/D ENABLE + Per Page DISABLE works but corollary
183 Global DISABLE + Per Page ENABLE won't work
184
Vineet Gupta4102b532013-05-09 21:54:51 +0530185config ARC_CACHE_VIPT_ALIASING
186 bool "Support VIPT Aliasing D$"
Alexey Brodkin2f9e9962013-06-18 16:40:29 +0400187 depends on ARC_HAS_DCACHE
Vineet Gupta4102b532013-05-09 21:54:51 +0530188 default n
189
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530190endif #ARC_CACHE
191
Vineet Gupta8b5850f2013-01-18 15:12:25 +0530192config ARC_HAS_ICCM
193 bool "Use ICCM"
194 help
195 Single Cycle RAMS to store Fast Path Code
196 default n
197
198config ARC_ICCM_SZ
199 int "ICCM Size in KB"
200 default "64"
201 depends on ARC_HAS_ICCM
202
203config ARC_HAS_DCCM
204 bool "Use DCCM"
205 help
206 Single Cycle RAMS to store Fast Path Data
207 default n
208
209config ARC_DCCM_SZ
210 int "DCCM Size in KB"
211 default "64"
212 depends on ARC_HAS_DCCM
213
214config ARC_DCCM_BASE
215 hex "DCCM map address"
216 default "0xA0000000"
217 depends on ARC_HAS_DCCM
218
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530219config ARC_HAS_HW_MPY
220 bool "Use Hardware Multiplier (Normal or Faster XMAC)"
221 default y
222 help
223 Influences how gcc generates code for MPY operations.
224 If enabled, MPYxx insns are generated, provided by Standard/XMAC
225 Multipler. Otherwise software multipy lib is used
226
227choice
228 prompt "ARC700 MMU Version"
229 default ARC_MMU_V3 if ARC_CPU_770
230 default ARC_MMU_V2 if ARC_CPU_750D
231
232config ARC_MMU_V1
233 bool "MMU v1"
234 help
235 Orig ARC700 MMU
236
237config ARC_MMU_V2
238 bool "MMU v2"
239 help
240 Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio
241 when 2 D-TLB and 1 I-TLB entries index into same 2way set.
242
243config ARC_MMU_V3
244 bool "MMU v3"
245 depends on ARC_CPU_770
246 help
247 Introduced with ARC700 4.10: New Features
248 Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
249 Shared Address Spaces (SASID)
250
251endchoice
252
253
254choice
255 prompt "MMU Page Size"
256 default ARC_PAGE_SIZE_8K
257
258config ARC_PAGE_SIZE_8K
259 bool "8KB"
260 help
261 Choose between 8k vs 16k
262
263config ARC_PAGE_SIZE_16K
264 bool "16KB"
265 depends on ARC_MMU_V3
266
267config ARC_PAGE_SIZE_4K
268 bool "4KB"
269 depends on ARC_MMU_V3
270
271endchoice
272
Vineet Gupta4788a592013-01-18 15:12:22 +0530273config ARC_COMPACT_IRQ_LEVELS
274 bool "ARCompact IRQ Priorities: High(2)/Low(1)"
275 default n
276 # Timer HAS to be high priority, for any other high priority config
277 select ARC_IRQ3_LV2
Vineet Gupta41195d22013-01-18 15:12:23 +0530278 # if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy
279 depends on !SMP || ARC_HAS_REENTRANT_IRQ_LV2
Vineet Gupta4788a592013-01-18 15:12:22 +0530280
281if ARC_COMPACT_IRQ_LEVELS
282
283config ARC_IRQ3_LV2
284 bool
285
286config ARC_IRQ5_LV2
287 bool
288
289config ARC_IRQ6_LV2
290 bool
291
292endif
293
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530294config ARC_FPU_SAVE_RESTORE
295 bool "Enable FPU state persistence across context switch"
296 default n
297 help
298 Double Precision Floating Point unit had dedictaed regs which
299 need to be saved/restored across context-switch.
300 Note that ARC FPU is overly simplistic, unlike say x86, which has
301 hardware pieces to allow software to conditionally save/restore,
302 based on actual usage of FPU by a task. Thus our implemn does
303 this for all tasks in system.
304
Vineet Guptafbf8e132013-03-30 15:07:47 +0530305config ARC_CANT_LLSC
306 def_bool n
307
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530308menuconfig ARC_CPU_REL_4_10
309 bool "Enable support for Rel 4.10 features"
310 default n
311 help
312 -ARC770 (and dependent features) enabled
313 -ARC750 also shares some of the new features with 770
314
315config ARC_HAS_LLSC
316 bool "Insn: LLOCK/SCOND (efficient atomic ops)"
317 default y
Vineet Guptafbf8e132013-03-30 15:07:47 +0530318 depends on ARC_CPU_770 && !ARC_CANT_LLSC
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530319
320config ARC_HAS_SWAPE
321 bool "Insn: SWAPE (endian-swap)"
322 default y
323 depends on ARC_CPU_REL_4_10
324
325config ARC_HAS_RTSC
326 bool "Insn: RTSC (64-bit r/o cycle counter)"
327 default y
328 depends on ARC_CPU_REL_4_10
Vineet Gupta41195d22013-01-18 15:12:23 +0530329 # if SMP, enable RTSC only if counter is coherent across cores
330 depends on !SMP || ARC_HAS_COH_RTSC
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530331
332endmenu # "ARC CPU Configuration"
333
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530334config LINUX_LINK_BASE
335 hex "Linux Link Address"
336 default "0x80000000"
337 help
338 ARC700 divides the 32 bit phy address space into two equal halves
339 -Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU
340 -Upper 2G (0x8000_0000 onwards) is untranslated, for kernel
341 Typically Linux kernel is linked at the start of untransalted addr,
342 hence the default value of 0x8zs.
343 However some customers have peripherals mapped at this addr, so
344 Linux needs to be scooted a bit.
345 If you don't know what the above means, leave this setting alone.
346
Vineet Gupta080c3742013-02-11 19:52:57 +0530347config ARC_CURR_IN_REG
348 bool "Dedicate Register r25 for current_task pointer"
349 default y
350 help
351 This reserved Register R25 to point to Current Task in
352 kernel mode. This saves memory access for each such access
353
Vineet Gupta2e651ea2013-01-23 16:30:36 +0530354
355config ARC_MISALIGN_ACCESS
356 bool "Emulate unaligned memory access (userspace only)"
357 default N
358 select SYSCTL_ARCH_UNALIGN_NO_WARN
359 select SYSCTL_ARCH_UNALIGN_ALLOW
360 help
361 This enables misaligned 16 & 32 bit memory access from user space.
362 Use ONLY-IF-ABS-NECESSARY as it will be very slow and also can hide
363 potential bugs in code
364
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530365config HZ
366 int "Timer Frequency"
367 default 100
368
Vineet Guptacbe056f2013-01-18 15:12:25 +0530369config ARC_METAWARE_HLINK
370 bool "Support for Metaware debugger assisted Host access"
371 default n
372 help
373 This options allows a Linux userland apps to directly access
374 host file system (open/creat/read/write etc) with help from
375 Metaware Debugger. This can come in handy for Linux-host communication
376 when there is no real usable peripheral such as EMAC.
377
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530378menuconfig ARC_DBG
379 bool "ARC debugging"
380 default y
381
Vineet Gupta854a0d92013-01-22 17:03:19 +0530382config ARC_DW2_UNWIND
383 bool "Enable DWARF specific kernel stack unwind"
384 depends on ARC_DBG
385 default y
386 select KALLSYMS
387 help
388 Compiles the kernel with DWARF unwind information and can be used
389 to get stack backtraces.
390
391 If you say Y here the resulting kernel image will be slightly larger
392 but not slower, and it will give very useful debugging information.
393 If you don't debug the kernel, you can say N, but we may not be able
394 to solve problems without frame unwind information
395
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530396config ARC_DBG_TLB_PARANOIA
397 bool "Paranoia Checks in Low Level TLB Handlers"
Mischa Jonkerf46121b2013-01-18 15:12:24 +0530398 depends on ARC_DBG
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530399 default n
400
401config ARC_DBG_TLB_MISS_COUNT
402 bool "Profile TLB Misses"
403 default n
404 select DEBUG_FS
405 depends on ARC_DBG
406 help
407 Counts number of I and D TLB Misses and exports them via Debugfs
408 The counters can be cleared via Debugfs as well
409
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530410config CMDLINE_UBOOT
411 bool "Support U-boot kernel command line passing"
412 default n
413 help
414 If you are using U-boot (www.denx.de) and wish to pass the kernel
415 command line from the U-boot environment to the Linux kernel then
416 switch this option on.
417 ARC U-boot will setup the cmdline in RAM/flash and set r2 to point
Vineet Gupta69718812013-04-09 16:12:01 +0530418 to it. kernel startup code will append this to DeviceTree
419 /bootargs provided cmdline args.
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530420
Vineet Gupta999159a2013-01-22 17:00:52 +0530421config ARC_BUILTIN_DTB_NAME
422 string "Built in DTB"
423 help
424 Set the name of the DTB to embed in the vmlinux binary
425 Leaving it blank selects the minimal "skeleton" dtb
426
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530427source "kernel/Kconfig.preempt"
428
Vineet Gupta56288322013-04-06 14:16:20 +0530429menu "Executable file formats"
430source "fs/Kconfig.binfmt"
431endmenu
432
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530433endmenu # "ARC Architecture Configuration"
434
435source "mm/Kconfig"
436source "net/Kconfig"
437source "drivers/Kconfig"
438source "fs/Kconfig"
439source "arch/arc/Kconfig.debug"
440source "security/Kconfig"
441source "crypto/Kconfig"
442source "lib/Kconfig"