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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 Gupta53d98952013-01-18 15:12:25 +053085menu "ARC Platform/SoC"
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053086
87config ARC_PLAT_FPGA_LEGACY
88 bool "\"Legacy\" ARC FPGA dev platform"
89 help
90 Support for ARC development platforms, provided by Synopsys.
91 These are based on FPGA or ISS. e.g.
92 - ARCAngel4
93 - ML509
94 - MetaWare ISS
95
96#New platform adds here
Vineet Gupta53d98952013-01-18 15:12:25 +053097endmenu
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053098
99menu "ARC CPU Configuration"
100
101choice
102 prompt "ARC Core"
103 default ARC_CPU_770
104
105config ARC_CPU_750D
106 bool "ARC750D"
107 help
108 Support for ARC750 core
109
110config ARC_CPU_770
111 bool "ARC770"
112 select ARC_CPU_REL_4_10
113 help
114 Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
115 This core has a bunch of cool new features:
116 -MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4)
117 Shared Address Spaces (for sharing TLB entires in MMU)
118 -Caches: New Prog Model, Region Flush
119 -Insns: endian swap, load-locked/store-conditional, time-stamp-ctr
120
121endchoice
122
123config CPU_BIG_ENDIAN
124 bool "Enable Big Endian Mode"
125 default n
126 help
127 Build kernel for Big Endian Mode of ARC CPU
128
Vineet Gupta41195d22013-01-18 15:12:23 +0530129config SMP
130 bool "Symmetric Multi-Processing (Incomplete)"
131 default n
132 select USE_GENERIC_SMP_HELPERS
133 help
134 This enables support for systems with more than one CPU. If you have
135 a system with only one CPU, like most personal computers, say N. If
136 you have a system with more than one CPU, say Y.
137
138if SMP
139
140config ARC_HAS_COH_CACHES
141 def_bool n
142
143config ARC_HAS_COH_LLSC
144 def_bool n
145
146config ARC_HAS_COH_RTSC
147 def_bool n
148
149config ARC_HAS_REENTRANT_IRQ_LV2
150 def_bool n
151
152endif
153
154config NR_CPUS
155 int "Maximum number of CPUs (2-32)"
156 range 2 32
157 depends on SMP
158 default "2"
159
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530160menuconfig ARC_CACHE
161 bool "Enable Cache Support"
162 default y
Vineet Gupta41195d22013-01-18 15:12:23 +0530163 # if SMP, cache enabled ONLY if ARC implementation has cache coherency
164 depends on !SMP || ARC_HAS_COH_CACHES
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530165
166if ARC_CACHE
167
168config ARC_CACHE_LINE_SHIFT
169 int "Cache Line Length (as power of 2)"
170 range 5 7
171 default "6"
172 help
173 Starting with ARC700 4.9, Cache line length is configurable,
174 This option specifies "N", with Line-len = 2 power N
175 So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
176 Linux only supports same line lengths for I and D caches.
177
178config ARC_HAS_ICACHE
179 bool "Use Instruction Cache"
180 default y
181
182config ARC_HAS_DCACHE
183 bool "Use Data Cache"
184 default y
185
186config ARC_CACHE_PAGES
187 bool "Per Page Cache Control"
188 default y
189 depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE
190 help
191 This can be used to over-ride the global I/D Cache Enable on a
192 per-page basis (but only for pages accessed via MMU such as
193 Kernel Virtual address or User Virtual Address)
194 TLB entries have a per-page Cache Enable Bit.
195 Note that Global I/D ENABLE + Per Page DISABLE works but corollary
196 Global DISABLE + Per Page ENABLE won't work
197
198endif #ARC_CACHE
199
Vineet Gupta8b5850f2013-01-18 15:12:25 +0530200config ARC_HAS_ICCM
201 bool "Use ICCM"
202 help
203 Single Cycle RAMS to store Fast Path Code
204 default n
205
206config ARC_ICCM_SZ
207 int "ICCM Size in KB"
208 default "64"
209 depends on ARC_HAS_ICCM
210
211config ARC_HAS_DCCM
212 bool "Use DCCM"
213 help
214 Single Cycle RAMS to store Fast Path Data
215 default n
216
217config ARC_DCCM_SZ
218 int "DCCM Size in KB"
219 default "64"
220 depends on ARC_HAS_DCCM
221
222config ARC_DCCM_BASE
223 hex "DCCM map address"
224 default "0xA0000000"
225 depends on ARC_HAS_DCCM
226
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530227config ARC_HAS_HW_MPY
228 bool "Use Hardware Multiplier (Normal or Faster XMAC)"
229 default y
230 help
231 Influences how gcc generates code for MPY operations.
232 If enabled, MPYxx insns are generated, provided by Standard/XMAC
233 Multipler. Otherwise software multipy lib is used
234
235choice
236 prompt "ARC700 MMU Version"
237 default ARC_MMU_V3 if ARC_CPU_770
238 default ARC_MMU_V2 if ARC_CPU_750D
239
240config ARC_MMU_V1
241 bool "MMU v1"
242 help
243 Orig ARC700 MMU
244
245config ARC_MMU_V2
246 bool "MMU v2"
247 help
248 Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio
249 when 2 D-TLB and 1 I-TLB entries index into same 2way set.
250
251config ARC_MMU_V3
252 bool "MMU v3"
253 depends on ARC_CPU_770
254 help
255 Introduced with ARC700 4.10: New Features
256 Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
257 Shared Address Spaces (SASID)
258
259endchoice
260
261
262choice
263 prompt "MMU Page Size"
264 default ARC_PAGE_SIZE_8K
265
266config ARC_PAGE_SIZE_8K
267 bool "8KB"
268 help
269 Choose between 8k vs 16k
270
271config ARC_PAGE_SIZE_16K
272 bool "16KB"
273 depends on ARC_MMU_V3
274
275config ARC_PAGE_SIZE_4K
276 bool "4KB"
277 depends on ARC_MMU_V3
278
279endchoice
280
Vineet Gupta4788a592013-01-18 15:12:22 +0530281config ARC_COMPACT_IRQ_LEVELS
282 bool "ARCompact IRQ Priorities: High(2)/Low(1)"
283 default n
284 # Timer HAS to be high priority, for any other high priority config
285 select ARC_IRQ3_LV2
Vineet Gupta41195d22013-01-18 15:12:23 +0530286 # if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy
287 depends on !SMP || ARC_HAS_REENTRANT_IRQ_LV2
Vineet Gupta4788a592013-01-18 15:12:22 +0530288
289if ARC_COMPACT_IRQ_LEVELS
290
291config ARC_IRQ3_LV2
292 bool
293
294config ARC_IRQ5_LV2
295 bool
296
297config ARC_IRQ6_LV2
298 bool
299
300endif
301
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530302config ARC_FPU_SAVE_RESTORE
303 bool "Enable FPU state persistence across context switch"
304 default n
305 help
306 Double Precision Floating Point unit had dedictaed regs which
307 need to be saved/restored across context-switch.
308 Note that ARC FPU is overly simplistic, unlike say x86, which has
309 hardware pieces to allow software to conditionally save/restore,
310 based on actual usage of FPU by a task. Thus our implemn does
311 this for all tasks in system.
312
313menuconfig ARC_CPU_REL_4_10
314 bool "Enable support for Rel 4.10 features"
315 default n
316 help
317 -ARC770 (and dependent features) enabled
318 -ARC750 also shares some of the new features with 770
319
320config ARC_HAS_LLSC
321 bool "Insn: LLOCK/SCOND (efficient atomic ops)"
322 default y
323 depends on ARC_CPU_770
324 # if SMP, enable LLSC ONLY if ARC implementation has coherent atomics
325 depends on !SMP || ARC_HAS_COH_LLSC
326
327config ARC_HAS_SWAPE
328 bool "Insn: SWAPE (endian-swap)"
329 default y
330 depends on ARC_CPU_REL_4_10
331
332config ARC_HAS_RTSC
333 bool "Insn: RTSC (64-bit r/o cycle counter)"
334 default y
335 depends on ARC_CPU_REL_4_10
Vineet Gupta41195d22013-01-18 15:12:23 +0530336 # if SMP, enable RTSC only if counter is coherent across cores
337 depends on !SMP || ARC_HAS_COH_RTSC
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530338
339endmenu # "ARC CPU Configuration"
340
341menu "Platform Board Configuration"
342
343source "arch/arc/plat-arcfpga/Kconfig"
344
345#New platform adds here
346
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530347config LINUX_LINK_BASE
348 hex "Linux Link Address"
349 default "0x80000000"
350 help
351 ARC700 divides the 32 bit phy address space into two equal halves
352 -Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU
353 -Upper 2G (0x8000_0000 onwards) is untranslated, for kernel
354 Typically Linux kernel is linked at the start of untransalted addr,
355 hence the default value of 0x8zs.
356 However some customers have peripherals mapped at this addr, so
357 Linux needs to be scooted a bit.
358 If you don't know what the above means, leave this setting alone.
359
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530360endmenu # "Platform Board Configuration"
361
Vineet Gupta080c3742013-02-11 19:52:57 +0530362config ARC_CURR_IN_REG
363 bool "Dedicate Register r25 for current_task pointer"
364 default y
365 help
366 This reserved Register R25 to point to Current Task in
367 kernel mode. This saves memory access for each such access
368
Vineet Gupta2e651ea2013-01-23 16:30:36 +0530369
370config ARC_MISALIGN_ACCESS
371 bool "Emulate unaligned memory access (userspace only)"
372 default N
373 select SYSCTL_ARCH_UNALIGN_NO_WARN
374 select SYSCTL_ARCH_UNALIGN_ALLOW
375 help
376 This enables misaligned 16 & 32 bit memory access from user space.
377 Use ONLY-IF-ABS-NECESSARY as it will be very slow and also can hide
378 potential bugs in code
379
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530380config ARC_STACK_NONEXEC
381 bool "Make stack non-executable"
382 default n
383 help
384 To disable the execute permissions of stack/heap of processes
385 which are enabled by default.
386
387config HZ
388 int "Timer Frequency"
389 default 100
390
Vineet Guptacbe056f2013-01-18 15:12:25 +0530391config ARC_METAWARE_HLINK
392 bool "Support for Metaware debugger assisted Host access"
393 default n
394 help
395 This options allows a Linux userland apps to directly access
396 host file system (open/creat/read/write etc) with help from
397 Metaware Debugger. This can come in handy for Linux-host communication
398 when there is no real usable peripheral such as EMAC.
399
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530400menuconfig ARC_DBG
401 bool "ARC debugging"
402 default y
403
Vineet Gupta854a0d92013-01-22 17:03:19 +0530404config ARC_DW2_UNWIND
405 bool "Enable DWARF specific kernel stack unwind"
406 depends on ARC_DBG
407 default y
408 select KALLSYMS
409 help
410 Compiles the kernel with DWARF unwind information and can be used
411 to get stack backtraces.
412
413 If you say Y here the resulting kernel image will be slightly larger
414 but not slower, and it will give very useful debugging information.
415 If you don't debug the kernel, you can say N, but we may not be able
416 to solve problems without frame unwind information
417
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530418config ARC_DBG_TLB_PARANOIA
419 bool "Paranoia Checks in Low Level TLB Handlers"
Mischa Jonkerf46121b2013-01-18 15:12:24 +0530420 depends on ARC_DBG
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530421 default n
422
423config ARC_DBG_TLB_MISS_COUNT
424 bool "Profile TLB Misses"
425 default n
426 select DEBUG_FS
427 depends on ARC_DBG
428 help
429 Counts number of I and D TLB Misses and exports them via Debugfs
430 The counters can be cleared via Debugfs as well
431
432config CMDLINE
433 string "Kernel command line to built-in"
434 default "print-fatal-signals=1"
435 help
436 The default command line which will be appended to the optional
437 u-boot provided command line (see below)
438
439config CMDLINE_UBOOT
440 bool "Support U-boot kernel command line passing"
441 default n
442 help
443 If you are using U-boot (www.denx.de) and wish to pass the kernel
444 command line from the U-boot environment to the Linux kernel then
445 switch this option on.
446 ARC U-boot will setup the cmdline in RAM/flash and set r2 to point
447 to it. kernel startup code will copy the string into cmdline buffer
448 and also append CONFIG_CMDLINE.
449
Vineet Gupta999159a2013-01-22 17:00:52 +0530450config ARC_BUILTIN_DTB_NAME
451 string "Built in DTB"
452 help
453 Set the name of the DTB to embed in the vmlinux binary
454 Leaving it blank selects the minimal "skeleton" dtb
455
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530456source "kernel/Kconfig.preempt"
457
458endmenu # "ARC Architecture Configuration"
459
460source "mm/Kconfig"
461source "net/Kconfig"
462source "drivers/Kconfig"
463source "fs/Kconfig"
464source "arch/arc/Kconfig.debug"
465source "security/Kconfig"
466source "crypto/Kconfig"
467source "lib/Kconfig"