blob: 405ea7a756b82669239d3ae9379db97e56f61e4c [file] [log] [blame]
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
Vineet Gupta547f1122013-01-18 15:12:22 +053025 select HAVE_ARCH_TRACEHOOK
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053026 select HAVE_GENERIC_HARDIRQS
Vineet Guptac121c502013-01-18 15:12:20 +053027 select HAVE_MEMBLOCK
Vineet Gupta769bc1f2013-01-22 17:02:38 +053028 select HAVE_OPROFILE
Vineet Gupta999159a2013-01-22 17:00:52 +053029 select IRQ_DOMAIN
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053030 select MODULES_USE_ELF_RELA
Vineet Guptac121c502013-01-18 15:12:20 +053031 select NO_BOOTMEM
Vineet Gupta999159a2013-01-22 17:00:52 +053032 select OF
33 select OF_EARLY_FLATTREE
Vineet Guptacfdbc2e2013-01-18 15:12:20 +053034
35config SCHED_OMIT_FRAME_POINTER
36 def_bool y
37
38config GENERIC_CSUM
39 def_bool y
40
41config RWSEM_GENERIC_SPINLOCK
42 def_bool y
43
44config ARCH_FLATMEM_ENABLE
45 def_bool y
46
47config MMU
48 def_bool y
49
50config NO_IOPORT
51 def_bool y
52
53config GENERIC_CALIBRATE_DELAY
54 def_bool y
55
56config GENERIC_HWEIGHT
57 def_bool y
58
59config BINFMT_ELF
60 def_bool y
61
62config HAVE_LATENCYTOP_SUPPORT
63 def_bool y
64
65config NO_DMA
66 def_bool n
67
68source "init/Kconfig"
69source "kernel/Kconfig.freezer"
70
71menu "ARC Architecture Configuration"
72
73choice
74 prompt "ARC Platform"
75 default ARC_PLAT_FPGA_LEGACY
76
77config ARC_PLAT_FPGA_LEGACY
78 bool "\"Legacy\" ARC FPGA dev platform"
79 help
80 Support for ARC development platforms, provided by Synopsys.
81 These are based on FPGA or ISS. e.g.
82 - ARCAngel4
83 - ML509
84 - MetaWare ISS
85
86#New platform adds here
87endchoice
88
89menu "ARC CPU Configuration"
90
91choice
92 prompt "ARC Core"
93 default ARC_CPU_770
94
95config ARC_CPU_750D
96 bool "ARC750D"
97 help
98 Support for ARC750 core
99
100config ARC_CPU_770
101 bool "ARC770"
102 select ARC_CPU_REL_4_10
103 help
104 Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
105 This core has a bunch of cool new features:
106 -MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4)
107 Shared Address Spaces (for sharing TLB entires in MMU)
108 -Caches: New Prog Model, Region Flush
109 -Insns: endian swap, load-locked/store-conditional, time-stamp-ctr
110
111endchoice
112
113config CPU_BIG_ENDIAN
114 bool "Enable Big Endian Mode"
115 default n
116 help
117 Build kernel for Big Endian Mode of ARC CPU
118
119menuconfig ARC_CACHE
120 bool "Enable Cache Support"
121 default y
122
123if ARC_CACHE
124
125config ARC_CACHE_LINE_SHIFT
126 int "Cache Line Length (as power of 2)"
127 range 5 7
128 default "6"
129 help
130 Starting with ARC700 4.9, Cache line length is configurable,
131 This option specifies "N", with Line-len = 2 power N
132 So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
133 Linux only supports same line lengths for I and D caches.
134
135config ARC_HAS_ICACHE
136 bool "Use Instruction Cache"
137 default y
138
139config ARC_HAS_DCACHE
140 bool "Use Data Cache"
141 default y
142
143config ARC_CACHE_PAGES
144 bool "Per Page Cache Control"
145 default y
146 depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE
147 help
148 This can be used to over-ride the global I/D Cache Enable on a
149 per-page basis (but only for pages accessed via MMU such as
150 Kernel Virtual address or User Virtual Address)
151 TLB entries have a per-page Cache Enable Bit.
152 Note that Global I/D ENABLE + Per Page DISABLE works but corollary
153 Global DISABLE + Per Page ENABLE won't work
154
155endif #ARC_CACHE
156
157config ARC_HAS_HW_MPY
158 bool "Use Hardware Multiplier (Normal or Faster XMAC)"
159 default y
160 help
161 Influences how gcc generates code for MPY operations.
162 If enabled, MPYxx insns are generated, provided by Standard/XMAC
163 Multipler. Otherwise software multipy lib is used
164
165choice
166 prompt "ARC700 MMU Version"
167 default ARC_MMU_V3 if ARC_CPU_770
168 default ARC_MMU_V2 if ARC_CPU_750D
169
170config ARC_MMU_V1
171 bool "MMU v1"
172 help
173 Orig ARC700 MMU
174
175config ARC_MMU_V2
176 bool "MMU v2"
177 help
178 Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio
179 when 2 D-TLB and 1 I-TLB entries index into same 2way set.
180
181config ARC_MMU_V3
182 bool "MMU v3"
183 depends on ARC_CPU_770
184 help
185 Introduced with ARC700 4.10: New Features
186 Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
187 Shared Address Spaces (SASID)
188
189endchoice
190
191
192choice
193 prompt "MMU Page Size"
194 default ARC_PAGE_SIZE_8K
195
196config ARC_PAGE_SIZE_8K
197 bool "8KB"
198 help
199 Choose between 8k vs 16k
200
201config ARC_PAGE_SIZE_16K
202 bool "16KB"
203 depends on ARC_MMU_V3
204
205config ARC_PAGE_SIZE_4K
206 bool "4KB"
207 depends on ARC_MMU_V3
208
209endchoice
210
211config ARC_FPU_SAVE_RESTORE
212 bool "Enable FPU state persistence across context switch"
213 default n
214 help
215 Double Precision Floating Point unit had dedictaed regs which
216 need to be saved/restored across context-switch.
217 Note that ARC FPU is overly simplistic, unlike say x86, which has
218 hardware pieces to allow software to conditionally save/restore,
219 based on actual usage of FPU by a task. Thus our implemn does
220 this for all tasks in system.
221
222menuconfig ARC_CPU_REL_4_10
223 bool "Enable support for Rel 4.10 features"
224 default n
225 help
226 -ARC770 (and dependent features) enabled
227 -ARC750 also shares some of the new features with 770
228
229config ARC_HAS_LLSC
230 bool "Insn: LLOCK/SCOND (efficient atomic ops)"
231 default y
232 depends on ARC_CPU_770
233 # if SMP, enable LLSC ONLY if ARC implementation has coherent atomics
234 depends on !SMP || ARC_HAS_COH_LLSC
235
236config ARC_HAS_SWAPE
237 bool "Insn: SWAPE (endian-swap)"
238 default y
239 depends on ARC_CPU_REL_4_10
240
241config ARC_HAS_RTSC
242 bool "Insn: RTSC (64-bit r/o cycle counter)"
243 default y
244 depends on ARC_CPU_REL_4_10
245
246endmenu # "ARC CPU Configuration"
247
248menu "Platform Board Configuration"
249
250source "arch/arc/plat-arcfpga/Kconfig"
251
252#New platform adds here
253
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530254config LINUX_LINK_BASE
255 hex "Linux Link Address"
256 default "0x80000000"
257 help
258 ARC700 divides the 32 bit phy address space into two equal halves
259 -Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU
260 -Upper 2G (0x8000_0000 onwards) is untranslated, for kernel
261 Typically Linux kernel is linked at the start of untransalted addr,
262 hence the default value of 0x8zs.
263 However some customers have peripherals mapped at this addr, so
264 Linux needs to be scooted a bit.
265 If you don't know what the above means, leave this setting alone.
266
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530267endmenu # "Platform Board Configuration"
268
Vineet Gupta080c3742013-02-11 19:52:57 +0530269config ARC_CURR_IN_REG
270 bool "Dedicate Register r25 for current_task pointer"
271 default y
272 help
273 This reserved Register R25 to point to Current Task in
274 kernel mode. This saves memory access for each such access
275
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530276config ARC_STACK_NONEXEC
277 bool "Make stack non-executable"
278 default n
279 help
280 To disable the execute permissions of stack/heap of processes
281 which are enabled by default.
282
283config HZ
284 int "Timer Frequency"
285 default 100
286
287menuconfig ARC_DBG
288 bool "ARC debugging"
289 default y
290
291config ARC_DBG_TLB_PARANOIA
292 bool "Paranoia Checks in Low Level TLB Handlers"
293 depends on ARC_DBG
294 default n
295
296config ARC_DBG_TLB_MISS_COUNT
297 bool "Profile TLB Misses"
298 default n
299 select DEBUG_FS
300 depends on ARC_DBG
301 help
302 Counts number of I and D TLB Misses and exports them via Debugfs
303 The counters can be cleared via Debugfs as well
304
305config CMDLINE
306 string "Kernel command line to built-in"
307 default "print-fatal-signals=1"
308 help
309 The default command line which will be appended to the optional
310 u-boot provided command line (see below)
311
312config CMDLINE_UBOOT
313 bool "Support U-boot kernel command line passing"
314 default n
315 help
316 If you are using U-boot (www.denx.de) and wish to pass the kernel
317 command line from the U-boot environment to the Linux kernel then
318 switch this option on.
319 ARC U-boot will setup the cmdline in RAM/flash and set r2 to point
320 to it. kernel startup code will copy the string into cmdline buffer
321 and also append CONFIG_CMDLINE.
322
Vineet Gupta999159a2013-01-22 17:00:52 +0530323config ARC_BUILTIN_DTB_NAME
324 string "Built in DTB"
325 help
326 Set the name of the DTB to embed in the vmlinux binary
327 Leaving it blank selects the minimal "skeleton" dtb
328
Vineet Guptacfdbc2e2013-01-18 15:12:20 +0530329source "kernel/Kconfig.preempt"
330
331endmenu # "ARC Architecture Configuration"
332
333source "mm/Kconfig"
334source "net/Kconfig"
335source "drivers/Kconfig"
336source "fs/Kconfig"
337source "arch/arc/Kconfig.debug"
338source "security/Kconfig"
339source "crypto/Kconfig"
340source "lib/Kconfig"