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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
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053023 select HAVE_GENERIC_HARDIRQS
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
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"
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053080#New platform adds here
Vineet Gupta93ad7002013-01-22 16:51:50 +053081
Vineet Gupta53d98952013-01-18 15:12:25 +053082endmenu
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053083
84menu "ARC CPU Configuration"
85
86choice
87 prompt "ARC Core"
88 default ARC_CPU_770
89
90config ARC_CPU_750D
91 bool "ARC750D"
92 help
93 Support for ARC750 core
94
95config ARC_CPU_770
96 bool "ARC770"
97 select ARC_CPU_REL_4_10
98 help
99 Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
100 This core has a bunch of cool new features:
101 -MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4)
102 Shared Address Spaces (for sharing TLB entires in MMU)
103 -Caches: New Prog Model, Region Flush
104 -Insns: endian swap, load-locked/store-conditional, time-stamp-ctr
105
106endchoice
107
108config CPU_BIG_ENDIAN
109 bool "Enable Big Endian Mode"
110 default n
111 help
112 Build kernel for Big Endian Mode of ARC CPU
113
Vineet Guptafc7943d2013-01-22 16:53:57 +0530114# If a platform can't work with 0x8000_0000 based dma_addr_t
115config ARC_PLAT_NEEDS_CPU_TO_DMA
116 bool
117
Vineet Gupta41195d22013-01-18 15:12:23 +0530118config SMP
119 bool "Symmetric Multi-Processing (Incomplete)"
120 default n
121 select USE_GENERIC_SMP_HELPERS
122 help
123 This enables support for systems with more than one CPU. If you have
124 a system with only one CPU, like most personal computers, say N. If
125 you have a system with more than one CPU, say Y.
126
127if SMP
128
129config ARC_HAS_COH_CACHES
130 def_bool n
131
Vineet Gupta41195d22013-01-18 15:12:23 +0530132config ARC_HAS_COH_RTSC
133 def_bool n
134
135config ARC_HAS_REENTRANT_IRQ_LV2
136 def_bool n
137
138endif
139
140config NR_CPUS
141 int "Maximum number of CPUs (2-32)"
142 range 2 32
143 depends on SMP
144 default "2"
145
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530146menuconfig ARC_CACHE
147 bool "Enable Cache Support"
148 default y
Vineet Gupta41195d22013-01-18 15:12:23 +0530149 # if SMP, cache enabled ONLY if ARC implementation has cache coherency
150 depends on !SMP || ARC_HAS_COH_CACHES
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530151
152if ARC_CACHE
153
154config ARC_CACHE_LINE_SHIFT
155 int "Cache Line Length (as power of 2)"
156 range 5 7
157 default "6"
158 help
159 Starting with ARC700 4.9, Cache line length is configurable,
160 This option specifies "N", with Line-len = 2 power N
161 So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
162 Linux only supports same line lengths for I and D caches.
163
164config ARC_HAS_ICACHE
165 bool "Use Instruction Cache"
166 default y
167
168config ARC_HAS_DCACHE
169 bool "Use Data Cache"
170 default y
171
172config ARC_CACHE_PAGES
173 bool "Per Page Cache Control"
174 default y
175 depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE
176 help
177 This can be used to over-ride the global I/D Cache Enable on a
178 per-page basis (but only for pages accessed via MMU such as
179 Kernel Virtual address or User Virtual Address)
180 TLB entries have a per-page Cache Enable Bit.
181 Note that Global I/D ENABLE + Per Page DISABLE works but corollary
182 Global DISABLE + Per Page ENABLE won't work
183
184endif #ARC_CACHE
185
Vineet Gupta8b5850f2013-01-18 15:12:25 +0530186config ARC_HAS_ICCM
187 bool "Use ICCM"
188 help
189 Single Cycle RAMS to store Fast Path Code
190 default n
191
192config ARC_ICCM_SZ
193 int "ICCM Size in KB"
194 default "64"
195 depends on ARC_HAS_ICCM
196
197config ARC_HAS_DCCM
198 bool "Use DCCM"
199 help
200 Single Cycle RAMS to store Fast Path Data
201 default n
202
203config ARC_DCCM_SZ
204 int "DCCM Size in KB"
205 default "64"
206 depends on ARC_HAS_DCCM
207
208config ARC_DCCM_BASE
209 hex "DCCM map address"
210 default "0xA0000000"
211 depends on ARC_HAS_DCCM
212
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530213config ARC_HAS_HW_MPY
214 bool "Use Hardware Multiplier (Normal or Faster XMAC)"
215 default y
216 help
217 Influences how gcc generates code for MPY operations.
218 If enabled, MPYxx insns are generated, provided by Standard/XMAC
219 Multipler. Otherwise software multipy lib is used
220
221choice
222 prompt "ARC700 MMU Version"
223 default ARC_MMU_V3 if ARC_CPU_770
224 default ARC_MMU_V2 if ARC_CPU_750D
225
226config ARC_MMU_V1
227 bool "MMU v1"
228 help
229 Orig ARC700 MMU
230
231config ARC_MMU_V2
232 bool "MMU v2"
233 help
234 Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio
235 when 2 D-TLB and 1 I-TLB entries index into same 2way set.
236
237config ARC_MMU_V3
238 bool "MMU v3"
239 depends on ARC_CPU_770
240 help
241 Introduced with ARC700 4.10: New Features
242 Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
243 Shared Address Spaces (SASID)
244
245endchoice
246
247
248choice
249 prompt "MMU Page Size"
250 default ARC_PAGE_SIZE_8K
251
252config ARC_PAGE_SIZE_8K
253 bool "8KB"
254 help
255 Choose between 8k vs 16k
256
257config ARC_PAGE_SIZE_16K
258 bool "16KB"
259 depends on ARC_MMU_V3
260
261config ARC_PAGE_SIZE_4K
262 bool "4KB"
263 depends on ARC_MMU_V3
264
265endchoice
266
Vineet Gupta4788a592013-01-18 15:12:22 +0530267config ARC_COMPACT_IRQ_LEVELS
268 bool "ARCompact IRQ Priorities: High(2)/Low(1)"
269 default n
270 # Timer HAS to be high priority, for any other high priority config
271 select ARC_IRQ3_LV2
Vineet Gupta41195d22013-01-18 15:12:23 +0530272 # if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy
273 depends on !SMP || ARC_HAS_REENTRANT_IRQ_LV2
Vineet Gupta4788a592013-01-18 15:12:22 +0530274
275if ARC_COMPACT_IRQ_LEVELS
276
277config ARC_IRQ3_LV2
278 bool
279
280config ARC_IRQ5_LV2
281 bool
282
283config ARC_IRQ6_LV2
284 bool
285
286endif
287
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530288config ARC_FPU_SAVE_RESTORE
289 bool "Enable FPU state persistence across context switch"
290 default n
291 help
292 Double Precision Floating Point unit had dedictaed regs which
293 need to be saved/restored across context-switch.
294 Note that ARC FPU is overly simplistic, unlike say x86, which has
295 hardware pieces to allow software to conditionally save/restore,
296 based on actual usage of FPU by a task. Thus our implemn does
297 this for all tasks in system.
298
Vineet Guptafbf8e132013-03-30 15:07:47 +0530299config ARC_CANT_LLSC
300 def_bool n
301
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530302menuconfig ARC_CPU_REL_4_10
303 bool "Enable support for Rel 4.10 features"
304 default n
305 help
306 -ARC770 (and dependent features) enabled
307 -ARC750 also shares some of the new features with 770
308
309config ARC_HAS_LLSC
310 bool "Insn: LLOCK/SCOND (efficient atomic ops)"
311 default y
Vineet Guptafbf8e132013-03-30 15:07:47 +0530312 depends on ARC_CPU_770 && !ARC_CANT_LLSC
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530313
314config ARC_HAS_SWAPE
315 bool "Insn: SWAPE (endian-swap)"
316 default y
317 depends on ARC_CPU_REL_4_10
318
319config ARC_HAS_RTSC
320 bool "Insn: RTSC (64-bit r/o cycle counter)"
321 default y
322 depends on ARC_CPU_REL_4_10
Vineet Gupta41195d22013-01-18 15:12:23 +0530323 # if SMP, enable RTSC only if counter is coherent across cores
324 depends on !SMP || ARC_HAS_COH_RTSC
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530325
326endmenu # "ARC CPU Configuration"
327
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530328config LINUX_LINK_BASE
329 hex "Linux Link Address"
330 default "0x80000000"
331 help
332 ARC700 divides the 32 bit phy address space into two equal halves
333 -Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU
334 -Upper 2G (0x8000_0000 onwards) is untranslated, for kernel
335 Typically Linux kernel is linked at the start of untransalted addr,
336 hence the default value of 0x8zs.
337 However some customers have peripherals mapped at this addr, so
338 Linux needs to be scooted a bit.
339 If you don't know what the above means, leave this setting alone.
340
Vineet Gupta080c3742013-02-11 19:52:57 +0530341config ARC_CURR_IN_REG
342 bool "Dedicate Register r25 for current_task pointer"
343 default y
344 help
345 This reserved Register R25 to point to Current Task in
346 kernel mode. This saves memory access for each such access
347
Vineet Gupta2e651ea2013-01-23 16:30:36 +0530348
349config ARC_MISALIGN_ACCESS
350 bool "Emulate unaligned memory access (userspace only)"
351 default N
352 select SYSCTL_ARCH_UNALIGN_NO_WARN
353 select SYSCTL_ARCH_UNALIGN_ALLOW
354 help
355 This enables misaligned 16 & 32 bit memory access from user space.
356 Use ONLY-IF-ABS-NECESSARY as it will be very slow and also can hide
357 potential bugs in code
358
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530359config ARC_STACK_NONEXEC
360 bool "Make stack non-executable"
361 default n
362 help
363 To disable the execute permissions of stack/heap of processes
364 which are enabled by default.
365
366config HZ
367 int "Timer Frequency"
368 default 100
369
Vineet Guptacbe056f2013-01-18 15:12:25 +0530370config ARC_METAWARE_HLINK
371 bool "Support for Metaware debugger assisted Host access"
372 default n
373 help
374 This options allows a Linux userland apps to directly access
375 host file system (open/creat/read/write etc) with help from
376 Metaware Debugger. This can come in handy for Linux-host communication
377 when there is no real usable peripheral such as EMAC.
378
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530379menuconfig ARC_DBG
380 bool "ARC debugging"
381 default y
382
Vineet Gupta854a0d92013-01-22 17:03:19 +0530383config ARC_DW2_UNWIND
384 bool "Enable DWARF specific kernel stack unwind"
385 depends on ARC_DBG
386 default y
387 select KALLSYMS
388 help
389 Compiles the kernel with DWARF unwind information and can be used
390 to get stack backtraces.
391
392 If you say Y here the resulting kernel image will be slightly larger
393 but not slower, and it will give very useful debugging information.
394 If you don't debug the kernel, you can say N, but we may not be able
395 to solve problems without frame unwind information
396
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530397config ARC_DBG_TLB_PARANOIA
398 bool "Paranoia Checks in Low Level TLB Handlers"
Mischa Jonkerf46121b2013-01-18 15:12:24 +0530399 depends on ARC_DBG
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530400 default n
401
402config ARC_DBG_TLB_MISS_COUNT
403 bool "Profile TLB Misses"
404 default n
405 select DEBUG_FS
406 depends on ARC_DBG
407 help
408 Counts number of I and D TLB Misses and exports them via Debugfs
409 The counters can be cleared via Debugfs as well
410
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530411config CMDLINE_UBOOT
412 bool "Support U-boot kernel command line passing"
413 default n
414 help
415 If you are using U-boot (www.denx.de) and wish to pass the kernel
416 command line from the U-boot environment to the Linux kernel then
417 switch this option on.
418 ARC U-boot will setup the cmdline in RAM/flash and set r2 to point
Vineet Gupta69718812013-04-09 16:12:01 +0530419 to it. kernel startup code will append this to DeviceTree
420 /bootargs provided cmdline args.
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530421
Vineet Gupta999159a2013-01-22 17:00:52 +0530422config ARC_BUILTIN_DTB_NAME
423 string "Built in DTB"
424 help
425 Set the name of the DTB to embed in the vmlinux binary
426 Leaving it blank selects the minimal "skeleton" dtb
427
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530428source "kernel/Kconfig.preempt"
429
Vineet Gupta56288322013-04-06 14:16:20 +0530430menu "Executable file formats"
431source "fs/Kconfig.binfmt"
432endmenu
433
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530434endmenu # "ARC Architecture Configuration"
435
436source "mm/Kconfig"
437source "net/Kconfig"
438source "drivers/Kconfig"
439source "fs/Kconfig"
440source "arch/arc/Kconfig.debug"
441source "security/Kconfig"
442source "crypto/Kconfig"
443source "lib/Kconfig"