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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 Guptabf90e1e2013-01-18 15:12:18 +053019 select GENERIC_KERNEL_EXECVE
20 select GENERIC_KERNEL_THREAD
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053021 select GENERIC_PENDING_IRQ if SMP
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053022 select GENERIC_SMP_IDLE_THREAD
Mischa Jonkerf46121b2013-01-18 15:12:24 +053023 select HAVE_ARCH_KGDB
Vineet Gupta547f1122013-01-18 15:12:22 +053024 select HAVE_ARCH_TRACEHOOK
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053025 select HAVE_GENERIC_HARDIRQS
Gilad Ben-Yossef43689022013-01-22 16:48:45 +053026 select HAVE_IOREMAP_PROT
Vineet Gupta4d86dfb2013-01-22 17:03:59 +053027 select HAVE_KPROBES
28 select HAVE_KRETPROBES
Vineet Guptac121c502013-01-18 15:12:20 +053029 select HAVE_MEMBLOCK
Vineet Gupta854a0d92013-01-22 17:03:19 +053030 select HAVE_MOD_ARCH_SPECIFIC if ARC_DW2_UNWIND
Vineet Gupta769bc1f2013-01-22 17:02:38 +053031 select HAVE_OPROFILE
Vineet Gupta9c575642013-01-18 15:12:24 +053032 select HAVE_PERF_EVENTS
Vineet Gupta999159a2013-01-22 17:00:52 +053033 select IRQ_DOMAIN
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053034 select MODULES_USE_ELF_RELA
Vineet Guptac121c502013-01-18 15:12:20 +053035 select NO_BOOTMEM
Vineet Gupta999159a2013-01-22 17:00:52 +053036 select OF
37 select OF_EARLY_FLATTREE
Vineet Gupta9c575642013-01-18 15:12:24 +053038 select PERF_USE_VMALLOC
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053039
40config SCHED_OMIT_FRAME_POINTER
41 def_bool y
42
43config GENERIC_CSUM
44 def_bool y
45
46config RWSEM_GENERIC_SPINLOCK
47 def_bool y
48
49config ARCH_FLATMEM_ENABLE
50 def_bool y
51
52config MMU
53 def_bool y
54
55config NO_IOPORT
56 def_bool y
57
58config GENERIC_CALIBRATE_DELAY
59 def_bool y
60
61config GENERIC_HWEIGHT
62 def_bool y
63
Vineet Gupta44c8bb92013-01-18 15:12:23 +053064config STACKTRACE_SUPPORT
65 def_bool y
66 select STACKTRACE
67
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053068config HAVE_LATENCYTOP_SUPPORT
69 def_bool y
70
71config NO_DMA
72 def_bool n
73
74source "init/Kconfig"
75source "kernel/Kconfig.freezer"
76
77menu "ARC Architecture Configuration"
78
Vineet Gupta93ad7002013-01-22 16:51:50 +053079menu "ARC Platform/SoC/Board"
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053080
Vineet Gupta93ad7002013-01-22 16:51:50 +053081source "arch/arc/plat-arcfpga/Kconfig"
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053082#New platform adds here
Vineet Gupta93ad7002013-01-22 16:51:50 +053083
Vineet Gupta53d98952013-01-18 15:12:25 +053084endmenu
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053085
86menu "ARC CPU Configuration"
87
88choice
89 prompt "ARC Core"
90 default ARC_CPU_770
91
92config ARC_CPU_750D
93 bool "ARC750D"
94 help
95 Support for ARC750 core
96
97config ARC_CPU_770
98 bool "ARC770"
99 select ARC_CPU_REL_4_10
100 help
101 Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
102 This core has a bunch of cool new features:
103 -MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4)
104 Shared Address Spaces (for sharing TLB entires in MMU)
105 -Caches: New Prog Model, Region Flush
106 -Insns: endian swap, load-locked/store-conditional, time-stamp-ctr
107
108endchoice
109
110config CPU_BIG_ENDIAN
111 bool "Enable Big Endian Mode"
112 default n
113 help
114 Build kernel for Big Endian Mode of ARC CPU
115
Vineet Guptafc7943d2013-01-22 16:53:57 +0530116# If a platform can't work with 0x8000_0000 based dma_addr_t
117config ARC_PLAT_NEEDS_CPU_TO_DMA
118 bool
119
Vineet Gupta41195d22013-01-18 15:12:23 +0530120config SMP
121 bool "Symmetric Multi-Processing (Incomplete)"
122 default n
123 select USE_GENERIC_SMP_HELPERS
124 help
125 This enables support for systems with more than one CPU. If you have
126 a system with only one CPU, like most personal computers, say N. If
127 you have a system with more than one CPU, say Y.
128
129if SMP
130
131config ARC_HAS_COH_CACHES
132 def_bool n
133
Vineet Gupta41195d22013-01-18 15:12:23 +0530134config ARC_HAS_COH_RTSC
135 def_bool n
136
137config ARC_HAS_REENTRANT_IRQ_LV2
138 def_bool n
139
140endif
141
142config NR_CPUS
143 int "Maximum number of CPUs (2-32)"
144 range 2 32
145 depends on SMP
146 default "2"
147
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530148menuconfig ARC_CACHE
149 bool "Enable Cache Support"
150 default y
Vineet Gupta41195d22013-01-18 15:12:23 +0530151 # if SMP, cache enabled ONLY if ARC implementation has cache coherency
152 depends on !SMP || ARC_HAS_COH_CACHES
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530153
154if ARC_CACHE
155
156config ARC_CACHE_LINE_SHIFT
157 int "Cache Line Length (as power of 2)"
158 range 5 7
159 default "6"
160 help
161 Starting with ARC700 4.9, Cache line length is configurable,
162 This option specifies "N", with Line-len = 2 power N
163 So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
164 Linux only supports same line lengths for I and D caches.
165
166config ARC_HAS_ICACHE
167 bool "Use Instruction Cache"
168 default y
169
170config ARC_HAS_DCACHE
171 bool "Use Data Cache"
172 default y
173
174config ARC_CACHE_PAGES
175 bool "Per Page Cache Control"
176 default y
177 depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE
178 help
179 This can be used to over-ride the global I/D Cache Enable on a
180 per-page basis (but only for pages accessed via MMU such as
181 Kernel Virtual address or User Virtual Address)
182 TLB entries have a per-page Cache Enable Bit.
183 Note that Global I/D ENABLE + Per Page DISABLE works but corollary
184 Global DISABLE + Per Page ENABLE won't work
185
186endif #ARC_CACHE
187
Vineet Gupta8b5850f2013-01-18 15:12:25 +0530188config ARC_HAS_ICCM
189 bool "Use ICCM"
190 help
191 Single Cycle RAMS to store Fast Path Code
192 default n
193
194config ARC_ICCM_SZ
195 int "ICCM Size in KB"
196 default "64"
197 depends on ARC_HAS_ICCM
198
199config ARC_HAS_DCCM
200 bool "Use DCCM"
201 help
202 Single Cycle RAMS to store Fast Path Data
203 default n
204
205config ARC_DCCM_SZ
206 int "DCCM Size in KB"
207 default "64"
208 depends on ARC_HAS_DCCM
209
210config ARC_DCCM_BASE
211 hex "DCCM map address"
212 default "0xA0000000"
213 depends on ARC_HAS_DCCM
214
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530215config ARC_HAS_HW_MPY
216 bool "Use Hardware Multiplier (Normal or Faster XMAC)"
217 default y
218 help
219 Influences how gcc generates code for MPY operations.
220 If enabled, MPYxx insns are generated, provided by Standard/XMAC
221 Multipler. Otherwise software multipy lib is used
222
223choice
224 prompt "ARC700 MMU Version"
225 default ARC_MMU_V3 if ARC_CPU_770
226 default ARC_MMU_V2 if ARC_CPU_750D
227
228config ARC_MMU_V1
229 bool "MMU v1"
230 help
231 Orig ARC700 MMU
232
233config ARC_MMU_V2
234 bool "MMU v2"
235 help
236 Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio
237 when 2 D-TLB and 1 I-TLB entries index into same 2way set.
238
239config ARC_MMU_V3
240 bool "MMU v3"
241 depends on ARC_CPU_770
242 help
243 Introduced with ARC700 4.10: New Features
244 Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
245 Shared Address Spaces (SASID)
246
247endchoice
248
249
250choice
251 prompt "MMU Page Size"
252 default ARC_PAGE_SIZE_8K
253
254config ARC_PAGE_SIZE_8K
255 bool "8KB"
256 help
257 Choose between 8k vs 16k
258
259config ARC_PAGE_SIZE_16K
260 bool "16KB"
261 depends on ARC_MMU_V3
262
263config ARC_PAGE_SIZE_4K
264 bool "4KB"
265 depends on ARC_MMU_V3
266
267endchoice
268
Vineet Gupta4788a592013-01-18 15:12:22 +0530269config ARC_COMPACT_IRQ_LEVELS
270 bool "ARCompact IRQ Priorities: High(2)/Low(1)"
271 default n
272 # Timer HAS to be high priority, for any other high priority config
273 select ARC_IRQ3_LV2
Vineet Gupta41195d22013-01-18 15:12:23 +0530274 # if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy
275 depends on !SMP || ARC_HAS_REENTRANT_IRQ_LV2
Vineet Gupta4788a592013-01-18 15:12:22 +0530276
277if ARC_COMPACT_IRQ_LEVELS
278
279config ARC_IRQ3_LV2
280 bool
281
282config ARC_IRQ5_LV2
283 bool
284
285config ARC_IRQ6_LV2
286 bool
287
288endif
289
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530290config ARC_FPU_SAVE_RESTORE
291 bool "Enable FPU state persistence across context switch"
292 default n
293 help
294 Double Precision Floating Point unit had dedictaed regs which
295 need to be saved/restored across context-switch.
296 Note that ARC FPU is overly simplistic, unlike say x86, which has
297 hardware pieces to allow software to conditionally save/restore,
298 based on actual usage of FPU by a task. Thus our implemn does
299 this for all tasks in system.
300
Vineet Guptafbf8e132013-03-30 15:07:47 +0530301config ARC_CANT_LLSC
302 def_bool n
303
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530304menuconfig ARC_CPU_REL_4_10
305 bool "Enable support for Rel 4.10 features"
306 default n
307 help
308 -ARC770 (and dependent features) enabled
309 -ARC750 also shares some of the new features with 770
310
311config ARC_HAS_LLSC
312 bool "Insn: LLOCK/SCOND (efficient atomic ops)"
313 default y
Vineet Guptafbf8e132013-03-30 15:07:47 +0530314 depends on ARC_CPU_770 && !ARC_CANT_LLSC
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530315
316config ARC_HAS_SWAPE
317 bool "Insn: SWAPE (endian-swap)"
318 default y
319 depends on ARC_CPU_REL_4_10
320
321config ARC_HAS_RTSC
322 bool "Insn: RTSC (64-bit r/o cycle counter)"
323 default y
324 depends on ARC_CPU_REL_4_10
Vineet Gupta41195d22013-01-18 15:12:23 +0530325 # if SMP, enable RTSC only if counter is coherent across cores
326 depends on !SMP || ARC_HAS_COH_RTSC
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530327
328endmenu # "ARC CPU Configuration"
329
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530330config LINUX_LINK_BASE
331 hex "Linux Link Address"
332 default "0x80000000"
333 help
334 ARC700 divides the 32 bit phy address space into two equal halves
335 -Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU
336 -Upper 2G (0x8000_0000 onwards) is untranslated, for kernel
337 Typically Linux kernel is linked at the start of untransalted addr,
338 hence the default value of 0x8zs.
339 However some customers have peripherals mapped at this addr, so
340 Linux needs to be scooted a bit.
341 If you don't know what the above means, leave this setting alone.
342
Vineet Gupta080c3742013-02-11 19:52:57 +0530343config ARC_CURR_IN_REG
344 bool "Dedicate Register r25 for current_task pointer"
345 default y
346 help
347 This reserved Register R25 to point to Current Task in
348 kernel mode. This saves memory access for each such access
349
Vineet Gupta2e651ea2013-01-23 16:30:36 +0530350
351config ARC_MISALIGN_ACCESS
352 bool "Emulate unaligned memory access (userspace only)"
353 default N
354 select SYSCTL_ARCH_UNALIGN_NO_WARN
355 select SYSCTL_ARCH_UNALIGN_ALLOW
356 help
357 This enables misaligned 16 & 32 bit memory access from user space.
358 Use ONLY-IF-ABS-NECESSARY as it will be very slow and also can hide
359 potential bugs in code
360
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530361config ARC_STACK_NONEXEC
362 bool "Make stack non-executable"
363 default n
364 help
365 To disable the execute permissions of stack/heap of processes
366 which are enabled by default.
367
368config HZ
369 int "Timer Frequency"
370 default 100
371
Vineet Guptacbe056f2013-01-18 15:12:25 +0530372config ARC_METAWARE_HLINK
373 bool "Support for Metaware debugger assisted Host access"
374 default n
375 help
376 This options allows a Linux userland apps to directly access
377 host file system (open/creat/read/write etc) with help from
378 Metaware Debugger. This can come in handy for Linux-host communication
379 when there is no real usable peripheral such as EMAC.
380
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530381menuconfig ARC_DBG
382 bool "ARC debugging"
383 default y
384
Vineet Gupta854a0d92013-01-22 17:03:19 +0530385config ARC_DW2_UNWIND
386 bool "Enable DWARF specific kernel stack unwind"
387 depends on ARC_DBG
388 default y
389 select KALLSYMS
390 help
391 Compiles the kernel with DWARF unwind information and can be used
392 to get stack backtraces.
393
394 If you say Y here the resulting kernel image will be slightly larger
395 but not slower, and it will give very useful debugging information.
396 If you don't debug the kernel, you can say N, but we may not be able
397 to solve problems without frame unwind information
398
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530399config ARC_DBG_TLB_PARANOIA
400 bool "Paranoia Checks in Low Level TLB Handlers"
Mischa Jonkerf46121b2013-01-18 15:12:24 +0530401 depends on ARC_DBG
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530402 default n
403
404config ARC_DBG_TLB_MISS_COUNT
405 bool "Profile TLB Misses"
406 default n
407 select DEBUG_FS
408 depends on ARC_DBG
409 help
410 Counts number of I and D TLB Misses and exports them via Debugfs
411 The counters can be cleared via Debugfs as well
412
413config CMDLINE
414 string "Kernel command line to built-in"
415 default "print-fatal-signals=1"
416 help
417 The default command line which will be appended to the optional
418 u-boot provided command line (see below)
419
420config CMDLINE_UBOOT
421 bool "Support U-boot kernel command line passing"
422 default n
423 help
424 If you are using U-boot (www.denx.de) and wish to pass the kernel
425 command line from the U-boot environment to the Linux kernel then
426 switch this option on.
427 ARC U-boot will setup the cmdline in RAM/flash and set r2 to point
428 to it. kernel startup code will copy the string into cmdline buffer
429 and also append CONFIG_CMDLINE.
430
Vineet Gupta999159a2013-01-22 17:00:52 +0530431config ARC_BUILTIN_DTB_NAME
432 string "Built in DTB"
433 help
434 Set the name of the DTB to embed in the vmlinux binary
435 Leaving it blank selects the minimal "skeleton" dtb
436
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530437source "kernel/Kconfig.preempt"
438
Vineet Gupta56288322013-04-06 14:16:20 +0530439menu "Executable file formats"
440source "fs/Kconfig.binfmt"
441endmenu
442
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530443endmenu # "ARC Architecture Configuration"
444
445source "mm/Kconfig"
446source "net/Kconfig"
447source "drivers/Kconfig"
448source "fs/Kconfig"
449source "arch/arc/Kconfig.debug"
450source "security/Kconfig"
451source "crypto/Kconfig"
452source "lib/Kconfig"