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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 Guptaf06d19e2013-11-15 12:08:05 +053011 select BUILDTIME_EXTABLE_SORT
Vineet Gupta4adeefe2013-01-18 15:12:18 +053012 select CLONE_BACKWARDS
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053013 # ARC Busybox based initramfs absolutely relies on DEVTMPFS for /dev
14 select DEVTMPFS if !INITRAMFS_SOURCE=""
15 select GENERIC_ATOMIC64
16 select GENERIC_CLOCKEVENTS
17 select GENERIC_FIND_FIRST_BIT
18 # for now, we don't need GENERIC_IRQ_PROBE, CONFIG_GENERIC_IRQ_CHIP
19 select GENERIC_IRQ_SHOW
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053020 select GENERIC_PENDING_IRQ if SMP
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053021 select GENERIC_SMP_IDLE_THREAD
Mischa Jonkerf46121b2013-01-18 15:12:24 +053022 select HAVE_ARCH_KGDB
Vineet Gupta547f1122013-01-18 15:12:22 +053023 select HAVE_ARCH_TRACEHOOK
Gilad Ben-Yossef43689022013-01-22 16:48:45 +053024 select HAVE_IOREMAP_PROT
Vineet Gupta4d86dfb2013-01-22 17:03:59 +053025 select HAVE_KPROBES
26 select HAVE_KRETPROBES
Vineet Guptac121c502013-01-18 15:12:20 +053027 select HAVE_MEMBLOCK
Vineet Gupta854a0d92013-01-22 17:03:19 +053028 select HAVE_MOD_ARCH_SPECIFIC if ARC_DW2_UNWIND
Vineet Gupta769bc1f2013-01-22 17:02:38 +053029 select HAVE_OPROFILE
Vineet Gupta9c575642013-01-18 15:12:24 +053030 select HAVE_PERF_EVENTS
Vineet Gupta999159a2013-01-22 17:00:52 +053031 select IRQ_DOMAIN
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053032 select MODULES_USE_ELF_RELA
Vineet Guptac121c502013-01-18 15:12:20 +053033 select NO_BOOTMEM
Vineet Gupta999159a2013-01-22 17:00:52 +053034 select OF
35 select OF_EARLY_FLATTREE
Vineet Gupta9c575642013-01-18 15:12:24 +053036 select PERF_USE_VMALLOC
Dave Hansend1a1dc02013-07-01 13:04:42 -070037 select HAVE_DEBUG_STACKOVERFLOW
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053038
Vineet Gupta0dafafc2013-09-06 14:18:17 +053039config TRACE_IRQFLAGS_SUPPORT
40 def_bool y
41
42config LOCKDEP_SUPPORT
43 def_bool y
44
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053045config SCHED_OMIT_FRAME_POINTER
46 def_bool y
47
48config GENERIC_CSUM
49 def_bool y
50
51config RWSEM_GENERIC_SPINLOCK
52 def_bool y
53
54config ARCH_FLATMEM_ENABLE
55 def_bool y
56
57config MMU
58 def_bool y
59
60config NO_IOPORT
61 def_bool y
62
63config GENERIC_CALIBRATE_DELAY
64 def_bool y
65
66config GENERIC_HWEIGHT
67 def_bool y
68
Vineet Gupta44c8bb92013-01-18 15:12:23 +053069config STACKTRACE_SUPPORT
70 def_bool y
71 select STACKTRACE
72
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053073config HAVE_LATENCYTOP_SUPPORT
74 def_bool y
75
76config NO_DMA
77 def_bool n
78
79source "init/Kconfig"
80source "kernel/Kconfig.freezer"
81
82menu "ARC Architecture Configuration"
83
Vineet Gupta93ad7002013-01-22 16:51:50 +053084menu "ARC Platform/SoC/Board"
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053085
Vineet Gupta93ad7002013-01-22 16:51:50 +053086source "arch/arc/plat-arcfpga/Kconfig"
Christian Ruppert072eb692013-04-12 08:40:59 +020087source "arch/arc/plat-tb10x/Kconfig"
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053088#New platform adds here
Vineet Gupta93ad7002013-01-22 16:51:50 +053089
Vineet Gupta53d98952013-01-18 15:12:25 +053090endmenu
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053091
92menu "ARC CPU Configuration"
93
94choice
95 prompt "ARC Core"
96 default ARC_CPU_770
97
98config ARC_CPU_750D
99 bool "ARC750D"
100 help
101 Support for ARC750 core
102
103config ARC_CPU_770
104 bool "ARC770"
105 select ARC_CPU_REL_4_10
106 help
107 Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
108 This core has a bunch of cool new features:
109 -MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4)
110 Shared Address Spaces (for sharing TLB entires in MMU)
111 -Caches: New Prog Model, Region Flush
112 -Insns: endian swap, load-locked/store-conditional, time-stamp-ctr
113
114endchoice
115
116config CPU_BIG_ENDIAN
117 bool "Enable Big Endian Mode"
118 default n
119 help
120 Build kernel for Big Endian Mode of ARC CPU
121
Vineet Guptafc7943d2013-01-22 16:53:57 +0530122# If a platform can't work with 0x8000_0000 based dma_addr_t
123config ARC_PLAT_NEEDS_CPU_TO_DMA
124 bool
125
Vineet Gupta41195d22013-01-18 15:12:23 +0530126config SMP
127 bool "Symmetric Multi-Processing (Incomplete)"
128 default n
Vineet Gupta41195d22013-01-18 15:12:23 +0530129 help
130 This enables support for systems with more than one CPU. If you have
131 a system with only one CPU, like most personal computers, say N. If
132 you have a system with more than one CPU, say Y.
133
134if SMP
135
136config ARC_HAS_COH_CACHES
137 def_bool n
138
Vineet Gupta41195d22013-01-18 15:12:23 +0530139config ARC_HAS_REENTRANT_IRQ_LV2
140 def_bool n
141
142endif
143
144config NR_CPUS
Noam Camus3aa4f802013-06-03 15:19:59 +0300145 int "Maximum number of CPUs (2-4096)"
146 range 2 4096
Vineet Gupta41195d22013-01-18 15:12:23 +0530147 depends on SMP
148 default "2"
149
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530150menuconfig ARC_CACHE
151 bool "Enable Cache Support"
152 default y
Vineet Gupta41195d22013-01-18 15:12:23 +0530153 # if SMP, cache enabled ONLY if ARC implementation has cache coherency
154 depends on !SMP || ARC_HAS_COH_CACHES
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530155
156if ARC_CACHE
157
158config ARC_CACHE_LINE_SHIFT
159 int "Cache Line Length (as power of 2)"
160 range 5 7
161 default "6"
162 help
163 Starting with ARC700 4.9, Cache line length is configurable,
164 This option specifies "N", with Line-len = 2 power N
165 So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
166 Linux only supports same line lengths for I and D caches.
167
168config ARC_HAS_ICACHE
169 bool "Use Instruction Cache"
170 default y
171
172config ARC_HAS_DCACHE
173 bool "Use Data Cache"
174 default y
175
176config ARC_CACHE_PAGES
177 bool "Per Page Cache Control"
178 default y
179 depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE
180 help
181 This can be used to over-ride the global I/D Cache Enable on a
182 per-page basis (but only for pages accessed via MMU such as
183 Kernel Virtual address or User Virtual Address)
184 TLB entries have a per-page Cache Enable Bit.
185 Note that Global I/D ENABLE + Per Page DISABLE works but corollary
186 Global DISABLE + Per Page ENABLE won't work
187
Vineet Gupta4102b532013-05-09 21:54:51 +0530188config ARC_CACHE_VIPT_ALIASING
189 bool "Support VIPT Aliasing D$"
Alexey Brodkin2f9e9962013-06-18 16:40:29 +0400190 depends on ARC_HAS_DCACHE
Vineet Gupta4102b532013-05-09 21:54:51 +0530191 default n
192
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530193endif #ARC_CACHE
194
Vineet Gupta8b5850f2013-01-18 15:12:25 +0530195config ARC_HAS_ICCM
196 bool "Use ICCM"
197 help
198 Single Cycle RAMS to store Fast Path Code
199 default n
200
201config ARC_ICCM_SZ
202 int "ICCM Size in KB"
203 default "64"
204 depends on ARC_HAS_ICCM
205
206config ARC_HAS_DCCM
207 bool "Use DCCM"
208 help
209 Single Cycle RAMS to store Fast Path Data
210 default n
211
212config ARC_DCCM_SZ
213 int "DCCM Size in KB"
214 default "64"
215 depends on ARC_HAS_DCCM
216
217config ARC_DCCM_BASE
218 hex "DCCM map address"
219 default "0xA0000000"
220 depends on ARC_HAS_DCCM
221
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530222config ARC_HAS_HW_MPY
223 bool "Use Hardware Multiplier (Normal or Faster XMAC)"
224 default y
225 help
226 Influences how gcc generates code for MPY operations.
227 If enabled, MPYxx insns are generated, provided by Standard/XMAC
228 Multipler. Otherwise software multipy lib is used
229
230choice
231 prompt "ARC700 MMU Version"
232 default ARC_MMU_V3 if ARC_CPU_770
233 default ARC_MMU_V2 if ARC_CPU_750D
234
235config ARC_MMU_V1
236 bool "MMU v1"
237 help
238 Orig ARC700 MMU
239
240config ARC_MMU_V2
241 bool "MMU v2"
242 help
243 Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio
244 when 2 D-TLB and 1 I-TLB entries index into same 2way set.
245
246config ARC_MMU_V3
247 bool "MMU v3"
248 depends on ARC_CPU_770
249 help
250 Introduced with ARC700 4.10: New Features
251 Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
252 Shared Address Spaces (SASID)
253
254endchoice
255
256
257choice
258 prompt "MMU Page Size"
259 default ARC_PAGE_SIZE_8K
260
261config ARC_PAGE_SIZE_8K
262 bool "8KB"
263 help
264 Choose between 8k vs 16k
265
266config ARC_PAGE_SIZE_16K
267 bool "16KB"
268 depends on ARC_MMU_V3
269
270config ARC_PAGE_SIZE_4K
271 bool "4KB"
272 depends on ARC_MMU_V3
273
274endchoice
275
Vineet Gupta4788a592013-01-18 15:12:22 +0530276config ARC_COMPACT_IRQ_LEVELS
277 bool "ARCompact IRQ Priorities: High(2)/Low(1)"
278 default n
279 # Timer HAS to be high priority, for any other high priority config
280 select ARC_IRQ3_LV2
Vineet Gupta41195d22013-01-18 15:12:23 +0530281 # if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy
282 depends on !SMP || ARC_HAS_REENTRANT_IRQ_LV2
Vineet Gupta4788a592013-01-18 15:12:22 +0530283
284if ARC_COMPACT_IRQ_LEVELS
285
286config ARC_IRQ3_LV2
287 bool
288
289config ARC_IRQ5_LV2
290 bool
291
292config ARC_IRQ6_LV2
293 bool
294
295endif
296
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530297config ARC_FPU_SAVE_RESTORE
298 bool "Enable FPU state persistence across context switch"
299 default n
300 help
301 Double Precision Floating Point unit had dedictaed regs which
302 need to be saved/restored across context-switch.
303 Note that ARC FPU is overly simplistic, unlike say x86, which has
304 hardware pieces to allow software to conditionally save/restore,
305 based on actual usage of FPU by a task. Thus our implemn does
306 this for all tasks in system.
307
Vineet Guptafbf8e132013-03-30 15:07:47 +0530308config ARC_CANT_LLSC
309 def_bool n
310
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530311menuconfig ARC_CPU_REL_4_10
312 bool "Enable support for Rel 4.10 features"
313 default n
314 help
315 -ARC770 (and dependent features) enabled
316 -ARC750 also shares some of the new features with 770
317
318config ARC_HAS_LLSC
319 bool "Insn: LLOCK/SCOND (efficient atomic ops)"
320 default y
Vineet Guptafbf8e132013-03-30 15:07:47 +0530321 depends on ARC_CPU_770 && !ARC_CANT_LLSC
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530322
323config ARC_HAS_SWAPE
324 bool "Insn: SWAPE (endian-swap)"
325 default y
326 depends on ARC_CPU_REL_4_10
327
328config ARC_HAS_RTSC
329 bool "Insn: RTSC (64-bit r/o cycle counter)"
330 default y
331 depends on ARC_CPU_REL_4_10
Vineet Gupta7d0857a2013-09-09 16:04:15 +0530332 depends on !SMP
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530333
334endmenu # "ARC CPU Configuration"
335
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530336config LINUX_LINK_BASE
337 hex "Linux Link Address"
338 default "0x80000000"
339 help
340 ARC700 divides the 32 bit phy address space into two equal halves
341 -Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU
342 -Upper 2G (0x8000_0000 onwards) is untranslated, for kernel
343 Typically Linux kernel is linked at the start of untransalted addr,
344 hence the default value of 0x8zs.
345 However some customers have peripherals mapped at this addr, so
346 Linux needs to be scooted a bit.
347 If you don't know what the above means, leave this setting alone.
348
Vineet Gupta080c3742013-02-11 19:52:57 +0530349config ARC_CURR_IN_REG
350 bool "Dedicate Register r25 for current_task pointer"
351 default y
352 help
353 This reserved Register R25 to point to Current Task in
354 kernel mode. This saves memory access for each such access
355
Vineet Gupta2e651ea2013-01-23 16:30:36 +0530356
357config ARC_MISALIGN_ACCESS
358 bool "Emulate unaligned memory access (userspace only)"
359 default N
360 select SYSCTL_ARCH_UNALIGN_NO_WARN
361 select SYSCTL_ARCH_UNALIGN_ALLOW
362 help
363 This enables misaligned 16 & 32 bit memory access from user space.
364 Use ONLY-IF-ABS-NECESSARY as it will be very slow and also can hide
365 potential bugs in code
366
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530367config HZ
368 int "Timer Frequency"
369 default 100
370
Vineet Guptacbe056f2013-01-18 15:12:25 +0530371config ARC_METAWARE_HLINK
372 bool "Support for Metaware debugger assisted Host access"
373 default n
374 help
375 This options allows a Linux userland apps to directly access
376 host file system (open/creat/read/write etc) with help from
377 Metaware Debugger. This can come in handy for Linux-host communication
378 when there is no real usable peripheral such as EMAC.
379
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530380menuconfig ARC_DBG
381 bool "ARC debugging"
382 default y
383
Vineet Gupta854a0d92013-01-22 17:03:19 +0530384config ARC_DW2_UNWIND
385 bool "Enable DWARF specific kernel stack unwind"
386 depends on ARC_DBG
387 default y
388 select KALLSYMS
389 help
390 Compiles the kernel with DWARF unwind information and can be used
391 to get stack backtraces.
392
393 If you say Y here the resulting kernel image will be slightly larger
394 but not slower, and it will give very useful debugging information.
395 If you don't debug the kernel, you can say N, but we may not be able
396 to solve problems without frame unwind information
397
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530398config ARC_DBG_TLB_PARANOIA
399 bool "Paranoia Checks in Low Level TLB Handlers"
Mischa Jonkerf46121b2013-01-18 15:12:24 +0530400 depends on ARC_DBG
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530401 default n
402
403config ARC_DBG_TLB_MISS_COUNT
404 bool "Profile TLB Misses"
405 default n
406 select DEBUG_FS
407 depends on ARC_DBG
408 help
409 Counts number of I and D TLB Misses and exports them via Debugfs
410 The counters can be cleared via Debugfs as well
411
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530412config CMDLINE_UBOOT
413 bool "Support U-boot kernel command line passing"
414 default n
415 help
416 If you are using U-boot (www.denx.de) and wish to pass the kernel
417 command line from the U-boot environment to the Linux kernel then
418 switch this option on.
419 ARC U-boot will setup the cmdline in RAM/flash and set r2 to point
Vineet Gupta69718812013-04-09 16:12:01 +0530420 to it. kernel startup code will append this to DeviceTree
421 /bootargs provided cmdline args.
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530422
Vineet Gupta999159a2013-01-22 17:00:52 +0530423config ARC_BUILTIN_DTB_NAME
424 string "Built in DTB"
425 help
426 Set the name of the DTB to embed in the vmlinux binary
427 Leaving it blank selects the minimal "skeleton" dtb
428
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530429source "kernel/Kconfig.preempt"
430
Vineet Gupta56288322013-04-06 14:16:20 +0530431menu "Executable file formats"
432source "fs/Kconfig.binfmt"
433endmenu
434
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530435endmenu # "ARC Architecture Configuration"
436
437source "mm/Kconfig"
438source "net/Kconfig"
439source "drivers/Kconfig"
440source "fs/Kconfig"
441source "arch/arc/Kconfig.debug"
442source "security/Kconfig"
443source "crypto/Kconfig"
444source "lib/Kconfig"