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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
11 select ARCH_NO_VIRT_TO_BUS
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 Guptabf90e1e2013-01-18 15:12:18 +053020 select GENERIC_KERNEL_EXECVE
21 select GENERIC_KERNEL_THREAD
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053022 select GENERIC_PENDING_IRQ if SMP
Vineet Guptac3581032013-01-18 15:12:19 +053023 select GENERIC_SIGALTSTACK
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053024 select GENERIC_SMP_IDLE_THREAD
Mischa Jonkerf46121b2013-01-18 15:12:24 +053025 select HAVE_ARCH_KGDB
Vineet Gupta547f1122013-01-18 15:12:22 +053026 select HAVE_ARCH_TRACEHOOK
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053027 select HAVE_GENERIC_HARDIRQS
Gilad Ben-Yossef43689022013-01-22 16:48:45 +053028 select HAVE_IOREMAP_PROT
Vineet Gupta9c575642013-01-18 15:12:24 +053029 select HAVE_IRQ_WORK
Vineet Gupta4d86dfb2013-01-22 17:03:59 +053030 select HAVE_KPROBES
31 select HAVE_KRETPROBES
Vineet Guptac121c502013-01-18 15:12:20 +053032 select HAVE_MEMBLOCK
Vineet Gupta854a0d92013-01-22 17:03:19 +053033 select HAVE_MOD_ARCH_SPECIFIC if ARC_DW2_UNWIND
Vineet Gupta769bc1f2013-01-22 17:02:38 +053034 select HAVE_OPROFILE
Vineet Gupta9c575642013-01-18 15:12:24 +053035 select HAVE_PERF_EVENTS
Vineet Gupta999159a2013-01-22 17:00:52 +053036 select IRQ_DOMAIN
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053037 select MODULES_USE_ELF_RELA
Vineet Guptac121c502013-01-18 15:12:20 +053038 select NO_BOOTMEM
Vineet Gupta999159a2013-01-22 17:00:52 +053039 select OF
40 select OF_EARLY_FLATTREE
Vineet Gupta9c575642013-01-18 15:12:24 +053041 select PERF_USE_VMALLOC
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053042
43config SCHED_OMIT_FRAME_POINTER
44 def_bool y
45
46config GENERIC_CSUM
47 def_bool y
48
49config RWSEM_GENERIC_SPINLOCK
50 def_bool y
51
52config ARCH_FLATMEM_ENABLE
53 def_bool y
54
55config MMU
56 def_bool y
57
58config NO_IOPORT
59 def_bool y
60
61config GENERIC_CALIBRATE_DELAY
62 def_bool y
63
64config GENERIC_HWEIGHT
65 def_bool y
66
67config BINFMT_ELF
68 def_bool y
69
Vineet Gupta44c8bb92013-01-18 15:12:23 +053070config STACKTRACE_SUPPORT
71 def_bool y
72 select STACKTRACE
73
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053074config HAVE_LATENCYTOP_SUPPORT
75 def_bool y
76
77config NO_DMA
78 def_bool n
79
80source "init/Kconfig"
81source "kernel/Kconfig.freezer"
82
83menu "ARC Architecture Configuration"
84
Vineet Gupta93ad7002013-01-22 16:51:50 +053085menu "ARC Platform/SoC/Board"
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053086
Vineet Gupta93ad7002013-01-22 16:51:50 +053087source "arch/arc/plat-arcfpga/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
129 select USE_GENERIC_SMP_HELPERS
130 help
131 This enables support for systems with more than one CPU. If you have
132 a system with only one CPU, like most personal computers, say N. If
133 you have a system with more than one CPU, say Y.
134
135if SMP
136
137config ARC_HAS_COH_CACHES
138 def_bool n
139
140config ARC_HAS_COH_LLSC
141 def_bool n
142
143config ARC_HAS_COH_RTSC
144 def_bool n
145
146config ARC_HAS_REENTRANT_IRQ_LV2
147 def_bool n
148
149endif
150
151config NR_CPUS
152 int "Maximum number of CPUs (2-32)"
153 range 2 32
154 depends on SMP
155 default "2"
156
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530157menuconfig ARC_CACHE
158 bool "Enable Cache Support"
159 default y
Vineet Gupta41195d22013-01-18 15:12:23 +0530160 # if SMP, cache enabled ONLY if ARC implementation has cache coherency
161 depends on !SMP || ARC_HAS_COH_CACHES
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530162
163if ARC_CACHE
164
165config ARC_CACHE_LINE_SHIFT
166 int "Cache Line Length (as power of 2)"
167 range 5 7
168 default "6"
169 help
170 Starting with ARC700 4.9, Cache line length is configurable,
171 This option specifies "N", with Line-len = 2 power N
172 So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
173 Linux only supports same line lengths for I and D caches.
174
175config ARC_HAS_ICACHE
176 bool "Use Instruction Cache"
177 default y
178
179config ARC_HAS_DCACHE
180 bool "Use Data Cache"
181 default y
182
183config ARC_CACHE_PAGES
184 bool "Per Page Cache Control"
185 default y
186 depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE
187 help
188 This can be used to over-ride the global I/D Cache Enable on a
189 per-page basis (but only for pages accessed via MMU such as
190 Kernel Virtual address or User Virtual Address)
191 TLB entries have a per-page Cache Enable Bit.
192 Note that Global I/D ENABLE + Per Page DISABLE works but corollary
193 Global DISABLE + Per Page ENABLE won't work
194
195endif #ARC_CACHE
196
Vineet Gupta8b5850f2013-01-18 15:12:25 +0530197config ARC_HAS_ICCM
198 bool "Use ICCM"
199 help
200 Single Cycle RAMS to store Fast Path Code
201 default n
202
203config ARC_ICCM_SZ
204 int "ICCM Size in KB"
205 default "64"
206 depends on ARC_HAS_ICCM
207
208config ARC_HAS_DCCM
209 bool "Use DCCM"
210 help
211 Single Cycle RAMS to store Fast Path Data
212 default n
213
214config ARC_DCCM_SZ
215 int "DCCM Size in KB"
216 default "64"
217 depends on ARC_HAS_DCCM
218
219config ARC_DCCM_BASE
220 hex "DCCM map address"
221 default "0xA0000000"
222 depends on ARC_HAS_DCCM
223
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530224config ARC_HAS_HW_MPY
225 bool "Use Hardware Multiplier (Normal or Faster XMAC)"
226 default y
227 help
228 Influences how gcc generates code for MPY operations.
229 If enabled, MPYxx insns are generated, provided by Standard/XMAC
230 Multipler. Otherwise software multipy lib is used
231
232choice
233 prompt "ARC700 MMU Version"
234 default ARC_MMU_V3 if ARC_CPU_770
235 default ARC_MMU_V2 if ARC_CPU_750D
236
237config ARC_MMU_V1
238 bool "MMU v1"
239 help
240 Orig ARC700 MMU
241
242config ARC_MMU_V2
243 bool "MMU v2"
244 help
245 Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio
246 when 2 D-TLB and 1 I-TLB entries index into same 2way set.
247
248config ARC_MMU_V3
249 bool "MMU v3"
250 depends on ARC_CPU_770
251 help
252 Introduced with ARC700 4.10: New Features
253 Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
254 Shared Address Spaces (SASID)
255
256endchoice
257
258
259choice
260 prompt "MMU Page Size"
261 default ARC_PAGE_SIZE_8K
262
263config ARC_PAGE_SIZE_8K
264 bool "8KB"
265 help
266 Choose between 8k vs 16k
267
268config ARC_PAGE_SIZE_16K
269 bool "16KB"
270 depends on ARC_MMU_V3
271
272config ARC_PAGE_SIZE_4K
273 bool "4KB"
274 depends on ARC_MMU_V3
275
276endchoice
277
Vineet Gupta4788a592013-01-18 15:12:22 +0530278config ARC_COMPACT_IRQ_LEVELS
279 bool "ARCompact IRQ Priorities: High(2)/Low(1)"
280 default n
281 # Timer HAS to be high priority, for any other high priority config
282 select ARC_IRQ3_LV2
Vineet Gupta41195d22013-01-18 15:12:23 +0530283 # if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy
284 depends on !SMP || ARC_HAS_REENTRANT_IRQ_LV2
Vineet Gupta4788a592013-01-18 15:12:22 +0530285
286if ARC_COMPACT_IRQ_LEVELS
287
288config ARC_IRQ3_LV2
289 bool
290
291config ARC_IRQ5_LV2
292 bool
293
294config ARC_IRQ6_LV2
295 bool
296
297endif
298
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530299config ARC_FPU_SAVE_RESTORE
300 bool "Enable FPU state persistence across context switch"
301 default n
302 help
303 Double Precision Floating Point unit had dedictaed regs which
304 need to be saved/restored across context-switch.
305 Note that ARC FPU is overly simplistic, unlike say x86, which has
306 hardware pieces to allow software to conditionally save/restore,
307 based on actual usage of FPU by a task. Thus our implemn does
308 this for all tasks in system.
309
310menuconfig ARC_CPU_REL_4_10
311 bool "Enable support for Rel 4.10 features"
312 default n
313 help
314 -ARC770 (and dependent features) enabled
315 -ARC750 also shares some of the new features with 770
316
317config ARC_HAS_LLSC
318 bool "Insn: LLOCK/SCOND (efficient atomic ops)"
319 default y
320 depends on ARC_CPU_770
321 # if SMP, enable LLSC ONLY if ARC implementation has coherent atomics
322 depends on !SMP || ARC_HAS_COH_LLSC
323
324config ARC_HAS_SWAPE
325 bool "Insn: SWAPE (endian-swap)"
326 default y
327 depends on ARC_CPU_REL_4_10
328
329config ARC_HAS_RTSC
330 bool "Insn: RTSC (64-bit r/o cycle counter)"
331 default y
332 depends on ARC_CPU_REL_4_10
Vineet Gupta41195d22013-01-18 15:12:23 +0530333 # if SMP, enable RTSC only if counter is coherent across cores
334 depends on !SMP || ARC_HAS_COH_RTSC
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530335
336endmenu # "ARC CPU Configuration"
337
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530338config LINUX_LINK_BASE
339 hex "Linux Link Address"
340 default "0x80000000"
341 help
342 ARC700 divides the 32 bit phy address space into two equal halves
343 -Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU
344 -Upper 2G (0x8000_0000 onwards) is untranslated, for kernel
345 Typically Linux kernel is linked at the start of untransalted addr,
346 hence the default value of 0x8zs.
347 However some customers have peripherals mapped at this addr, so
348 Linux needs to be scooted a bit.
349 If you don't know what the above means, leave this setting alone.
350
Vineet Gupta080c3742013-02-11 19:52:57 +0530351config ARC_CURR_IN_REG
352 bool "Dedicate Register r25 for current_task pointer"
353 default y
354 help
355 This reserved Register R25 to point to Current Task in
356 kernel mode. This saves memory access for each such access
357
Vineet Gupta2e651ea2013-01-23 16:30:36 +0530358
359config ARC_MISALIGN_ACCESS
360 bool "Emulate unaligned memory access (userspace only)"
361 default N
362 select SYSCTL_ARCH_UNALIGN_NO_WARN
363 select SYSCTL_ARCH_UNALIGN_ALLOW
364 help
365 This enables misaligned 16 & 32 bit memory access from user space.
366 Use ONLY-IF-ABS-NECESSARY as it will be very slow and also can hide
367 potential bugs in code
368
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530369config ARC_STACK_NONEXEC
370 bool "Make stack non-executable"
371 default n
372 help
373 To disable the execute permissions of stack/heap of processes
374 which are enabled by default.
375
376config HZ
377 int "Timer Frequency"
378 default 100
379
Vineet Guptacbe056f2013-01-18 15:12:25 +0530380config ARC_METAWARE_HLINK
381 bool "Support for Metaware debugger assisted Host access"
382 default n
383 help
384 This options allows a Linux userland apps to directly access
385 host file system (open/creat/read/write etc) with help from
386 Metaware Debugger. This can come in handy for Linux-host communication
387 when there is no real usable peripheral such as EMAC.
388
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530389menuconfig ARC_DBG
390 bool "ARC debugging"
391 default y
392
Vineet Gupta854a0d92013-01-22 17:03:19 +0530393config ARC_DW2_UNWIND
394 bool "Enable DWARF specific kernel stack unwind"
395 depends on ARC_DBG
396 default y
397 select KALLSYMS
398 help
399 Compiles the kernel with DWARF unwind information and can be used
400 to get stack backtraces.
401
402 If you say Y here the resulting kernel image will be slightly larger
403 but not slower, and it will give very useful debugging information.
404 If you don't debug the kernel, you can say N, but we may not be able
405 to solve problems without frame unwind information
406
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530407config ARC_DBG_TLB_PARANOIA
408 bool "Paranoia Checks in Low Level TLB Handlers"
Mischa Jonkerf46121b2013-01-18 15:12:24 +0530409 depends on ARC_DBG
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530410 default n
411
412config ARC_DBG_TLB_MISS_COUNT
413 bool "Profile TLB Misses"
414 default n
415 select DEBUG_FS
416 depends on ARC_DBG
417 help
418 Counts number of I and D TLB Misses and exports them via Debugfs
419 The counters can be cleared via Debugfs as well
420
421config CMDLINE
422 string "Kernel command line to built-in"
423 default "print-fatal-signals=1"
424 help
425 The default command line which will be appended to the optional
426 u-boot provided command line (see below)
427
428config CMDLINE_UBOOT
429 bool "Support U-boot kernel command line passing"
430 default n
431 help
432 If you are using U-boot (www.denx.de) and wish to pass the kernel
433 command line from the U-boot environment to the Linux kernel then
434 switch this option on.
435 ARC U-boot will setup the cmdline in RAM/flash and set r2 to point
436 to it. kernel startup code will copy the string into cmdline buffer
437 and also append CONFIG_CMDLINE.
438
Vineet Gupta999159a2013-01-22 17:00:52 +0530439config ARC_BUILTIN_DTB_NAME
440 string "Built in DTB"
441 help
442 Set the name of the DTB to embed in the vmlinux binary
443 Leaving it blank selects the minimal "skeleton" dtb
444
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530445source "kernel/Kconfig.preempt"
446
447endmenu # "ARC Architecture Configuration"
448
449source "mm/Kconfig"
450source "net/Kconfig"
451source "drivers/Kconfig"
452source "fs/Kconfig"
453source "arch/arc/Kconfig.debug"
454source "security/Kconfig"
455source "crypto/Kconfig"
456source "lib/Kconfig"