Kconfig 10.1 KB
Newer Older
1 2 3 4 5 6 7 8 9 10
#
# Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#

config ARC
	def_bool y
11
	select BUILDTIME_EXTABLE_SORT
12
	select COMMON_CLK
13
	select CLONE_BACKWARDS
14 15 16 17 18 19 20 21 22
	# ARC Busybox based initramfs absolutely relies on DEVTMPFS for /dev
	select DEVTMPFS if !INITRAMFS_SOURCE=""
	select GENERIC_ATOMIC64
	select GENERIC_CLOCKEVENTS
	select GENERIC_FIND_FIRST_BIT
	# for now, we don't need GENERIC_IRQ_PROBE, CONFIG_GENERIC_IRQ_CHIP
	select GENERIC_IRQ_SHOW
	select GENERIC_PENDING_IRQ if SMP
	select GENERIC_SMP_IDLE_THREAD
M
Mischa Jonker 已提交
23
	select HAVE_ARCH_KGDB
V
Vineet Gupta 已提交
24
	select HAVE_ARCH_TRACEHOOK
25
	select HAVE_IOREMAP_PROT
V
Vineet Gupta 已提交
26 27
	select HAVE_KPROBES
	select HAVE_KRETPROBES
28
	select HAVE_MEMBLOCK
29
	select HAVE_MOD_ARCH_SPECIFIC if ARC_DW2_UNWIND
V
Vineet Gupta 已提交
30
	select HAVE_OPROFILE
31
	select HAVE_PERF_EVENTS
V
Vineet Gupta 已提交
32
	select IRQ_DOMAIN
33
	select MODULES_USE_ELF_RELA
34
	select NO_BOOTMEM
V
Vineet Gupta 已提交
35 36
	select OF
	select OF_EARLY_FLATTREE
37
	select PERF_USE_VMALLOC
38
	select HAVE_DEBUG_STACKOVERFLOW
39

40 41 42 43 44 45
config TRACE_IRQFLAGS_SUPPORT
	def_bool y

config LOCKDEP_SUPPORT
	def_bool y

46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
config SCHED_OMIT_FRAME_POINTER
	def_bool y

config GENERIC_CSUM
	def_bool y

config RWSEM_GENERIC_SPINLOCK
	def_bool y

config ARCH_FLATMEM_ENABLE
	def_bool y

config MMU
	def_bool y

61
config NO_IOPORT_MAP
62 63 64 65 66 67 68 69
	def_bool y

config GENERIC_CALIBRATE_DELAY
	def_bool y

config GENERIC_HWEIGHT
	def_bool y

70 71 72 73
config STACKTRACE_SUPPORT
	def_bool y
	select STACKTRACE

74 75 76 77 78 79 80 81
config HAVE_LATENCYTOP_SUPPORT
	def_bool y

source "init/Kconfig"
source "kernel/Kconfig.freezer"

menu "ARC Architecture Configuration"

82
menu "ARC Platform/SoC/Board"
83

V
Vineet Gupta 已提交
84
source "arch/arc/plat-sim/Kconfig"
85
source "arch/arc/plat-tb10x/Kconfig"
86
#New platform adds here
87

88
endmenu
89 90 91 92 93 94 95 96 97 98 99 100 101 102

menu "ARC CPU Configuration"

choice
	prompt "ARC Core"
	default ARC_CPU_770

config ARC_CPU_750D
	bool "ARC750D"
	help
	  Support for ARC750 core

config ARC_CPU_770
	bool "ARC770"
103
	select ARC_HAS_SWAPE
104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119
	help
	  Support for ARC770 core introduced with Rel 4.10 (Summer 2011)
	  This core has a bunch of cool new features:
	  -MMU-v3: Variable Page Sz (4k, 8k, 16k), bigger J-TLB (128x4)
                   Shared Address Spaces (for sharing TLB entires in MMU)
	  -Caches: New Prog Model, Region Flush
	  -Insns: endian swap, load-locked/store-conditional, time-stamp-ctr

endchoice

config CPU_BIG_ENDIAN
	bool "Enable Big Endian Mode"
	default n
	help
	  Build kernel for Big Endian Mode of ARC CPU

V
Vineet Gupta 已提交
120 121 122 123 124
config SMP
	bool "Symmetric Multi-Processing (Incomplete)"
	default n
	help
	  This enables support for systems with more than one CPU. If you have
125 126
	  a system with only one CPU, say N. If you have a system with more
	  than one CPU, say Y.
V
Vineet Gupta 已提交
127 128 129 130 131 132 133 134 135 136 137 138

if SMP

config ARC_HAS_COH_CACHES
	def_bool n

config ARC_HAS_REENTRANT_IRQ_LV2
	def_bool n

endif

config NR_CPUS
N
Noam Camus 已提交
139 140
	int "Maximum number of CPUs (2-4096)"
	range 2 4096
V
Vineet Gupta 已提交
141 142 143
	depends on SMP
	default "2"

144 145 146
menuconfig ARC_CACHE
	bool "Enable Cache Support"
	default y
V
Vineet Gupta 已提交
147 148
	# if SMP, cache enabled ONLY if ARC implementation has cache coherency
	depends on !SMP || ARC_HAS_COH_CACHES
149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181

if ARC_CACHE

config ARC_CACHE_LINE_SHIFT
	int "Cache Line Length (as power of 2)"
	range 5 7
	default "6"
	help
	  Starting with ARC700 4.9, Cache line length is configurable,
	  This option specifies "N", with Line-len = 2 power N
	  So line lengths of 32, 64, 128 are specified by 5,6,7, respectively
	  Linux only supports same line lengths for I and D caches.

config ARC_HAS_ICACHE
	bool "Use Instruction Cache"
	default y

config ARC_HAS_DCACHE
	bool "Use Data Cache"
	default y

config ARC_CACHE_PAGES
	bool "Per Page Cache Control"
	default y
	depends on ARC_HAS_ICACHE || ARC_HAS_DCACHE
	help
	  This can be used to over-ride the global I/D Cache Enable on a
	  per-page basis (but only for pages accessed via MMU such as
	  Kernel Virtual address or User Virtual Address)
	  TLB entries have a per-page Cache Enable Bit.
	  Note that Global I/D ENABLE + Per Page DISABLE works but corollary
	  Global DISABLE + Per Page ENABLE won't work

182 183
config ARC_CACHE_VIPT_ALIASING
	bool "Support VIPT Aliasing D$"
184
	depends on ARC_HAS_DCACHE
185 186
	default n

187 188
endif	#ARC_CACHE

189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215
config ARC_HAS_ICCM
	bool "Use ICCM"
	help
	  Single Cycle RAMS to store Fast Path Code
	default n

config ARC_ICCM_SZ
	int "ICCM Size in KB"
	default "64"
	depends on ARC_HAS_ICCM

config ARC_HAS_DCCM
	bool "Use DCCM"
	help
	  Single Cycle RAMS to store Fast Path Data
	default n

config ARC_DCCM_SZ
	int "DCCM Size in KB"
	default "64"
	depends on ARC_HAS_DCCM

config ARC_DCCM_BASE
	hex "DCCM map address"
	default "0xA0000000"
	depends on ARC_HAS_DCCM

216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269
config ARC_HAS_HW_MPY
	bool "Use Hardware Multiplier (Normal or Faster XMAC)"
	default y
	help
	  Influences how gcc generates code for MPY operations.
	  If enabled, MPYxx insns are generated, provided by Standard/XMAC
	  Multipler. Otherwise software multipy lib is used

choice
	prompt "ARC700 MMU Version"
	default ARC_MMU_V3 if ARC_CPU_770
	default ARC_MMU_V2 if ARC_CPU_750D

config ARC_MMU_V1
	bool "MMU v1"
	help
	  Orig ARC700 MMU

config ARC_MMU_V2
	bool "MMU v2"
	help
	  Fixed the deficiency of v1 - possible thrashing in memcpy sceanrio
	  when 2 D-TLB and 1 I-TLB entries index into same 2way set.

config ARC_MMU_V3
	bool "MMU v3"
	depends on ARC_CPU_770
	help
	  Introduced with ARC700 4.10: New Features
	  Variable Page size (1k-16k), var JTLB size 128 x (2 or 4)
	  Shared Address Spaces (SASID)

endchoice


choice
	prompt "MMU Page Size"
	default ARC_PAGE_SIZE_8K

config ARC_PAGE_SIZE_8K
	bool "8KB"
	help
	  Choose between 8k vs 16k

config ARC_PAGE_SIZE_16K
	bool "16KB"
	depends on ARC_MMU_V3

config ARC_PAGE_SIZE_4K
	bool "4KB"
	depends on ARC_MMU_V3

endchoice

270 271 272 273 274
config ARC_COMPACT_IRQ_LEVELS
	bool "ARCompact IRQ Priorities: High(2)/Low(1)"
	default n
	# Timer HAS to be high priority, for any other high priority config
	select ARC_IRQ3_LV2
V
Vineet Gupta 已提交
275 276
	# if SMP, LV2 enabled ONLY if ARC implementation has LV2 re-entrancy
	depends on !SMP || ARC_HAS_REENTRANT_IRQ_LV2
277 278 279 280 281 282 283 284 285 286 287 288 289 290

if ARC_COMPACT_IRQ_LEVELS

config ARC_IRQ3_LV2
	bool

config ARC_IRQ5_LV2
	bool

config ARC_IRQ6_LV2
	bool

endif

291 292 293 294 295 296 297 298 299 300 301
config ARC_FPU_SAVE_RESTORE
	bool "Enable FPU state persistence across context switch"
	default n
	help
	  Double Precision Floating Point unit had dedictaed regs which
	  need to be saved/restored across context-switch.
	  Note that ARC FPU is overly simplistic, unlike say x86, which has
	  hardware pieces to allow software to conditionally save/restore,
	  based on actual usage of FPU by a task. Thus our implemn does
	  this for all tasks in system.

302 303 304
config ARC_CANT_LLSC
	def_bool n

305 306 307
config ARC_HAS_LLSC
	bool "Insn: LLOCK/SCOND (efficient atomic ops)"
	default y
308
	depends on ARC_CPU_770 && !ARC_CANT_LLSC
309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328

config ARC_HAS_SWAPE
	bool "Insn: SWAPE (endian-swap)"
	default y

endmenu   # "ARC CPU Configuration"

config LINUX_LINK_BASE
	hex "Linux Link Address"
	default "0x80000000"
	help
	  ARC700 divides the 32 bit phy address space into two equal halves
	  -Lower 2G (0 - 0x7FFF_FFFF ) is user virtual, translated by MMU
	  -Upper 2G (0x8000_0000 onwards) is untranslated, for kernel
	  Typically Linux kernel is linked at the start of untransalted addr,
	  hence the default value of 0x8zs.
	  However some customers have peripherals mapped at this addr, so
	  Linux needs to be scooted a bit.
	  If you don't know what the above means, leave this setting alone.

329 330 331 332 333 334 335
config ARC_CURR_IN_REG
	bool "Dedicate Register r25 for current_task pointer"
	default y
	help
	  This reserved Register R25 to point to Current Task in
	  kernel mode. This saves memory access for each such access

V
Vineet Gupta 已提交
336

337
config ARC_EMUL_UNALIGNED
V
Vineet Gupta 已提交
338 339 340 341 342 343 344 345
	bool "Emulate unaligned memory access (userspace only)"
	select SYSCTL_ARCH_UNALIGN_NO_WARN
	select SYSCTL_ARCH_UNALIGN_ALLOW
	help
	  This enables misaligned 16 & 32 bit memory access from user space.
	  Use ONLY-IF-ABS-NECESSARY as it will be very slow and also can hide
	  potential bugs in code

346 347 348 349
config HZ
	int "Timer Frequency"
	default 100

350 351 352 353 354 355 356 357 358
config ARC_METAWARE_HLINK
	bool "Support for Metaware debugger assisted Host access"
	default n
	help
	  This options allows a Linux userland apps to directly access
	  host file system (open/creat/read/write etc) with help from
	  Metaware Debugger. This can come in handy for Linux-host communication
	  when there is no real usable peripheral such as EMAC.

359 360 361 362
menuconfig ARC_DBG
	bool "ARC debugging"
	default y

363 364 365 366 367 368 369 370 371 372 373 374 375 376
config ARC_DW2_UNWIND
	bool "Enable DWARF specific kernel stack unwind"
	depends on ARC_DBG
	default y
	select KALLSYMS
	help
	  Compiles the kernel with DWARF unwind information and can be used
	  to get stack backtraces.

	  If you say Y here the resulting kernel image will be slightly larger
	  but not slower, and it will give very useful debugging information.
	  If you don't debug the kernel, you can say N, but we may not be able
	  to solve problems without frame unwind information

377 378
config ARC_DBG_TLB_PARANOIA
	bool "Paranoia Checks in Low Level TLB Handlers"
M
Mischa Jonker 已提交
379
	depends on ARC_DBG
380 381 382 383 384 385 386 387 388 389 390
	default n

config ARC_DBG_TLB_MISS_COUNT
	bool "Profile TLB Misses"
	default n
	select DEBUG_FS
	depends on ARC_DBG
	help
	  Counts number of I and D TLB Misses and exports them via Debugfs
	  The counters can be cleared via Debugfs as well

V
Vineet Gupta 已提交
391 392 393 394 395 396 397 398 399 400 401 402
config ARC_UBOOT_SUPPORT
	bool "Support uboot arg Handling"
	default n
	help
	  ARC Linux by default checks for uboot provided args as pointers to
	  external cmdline or DTB. This however breaks in absence of uboot,
	  when booting from Metaware debugger directly, as the registers are
	  not zeroed out on reset by mdb and/or ARCv2 based cores. The bogus
	  registers look like uboot args to kernel which then chokes.
	  So only enable the uboot arg checking/processing if users are sure
	  of uboot being in play.

V
Vineet Gupta 已提交
403 404 405 406 407 408
config ARC_BUILTIN_DTB_NAME
	string "Built in DTB"
	help
	  Set the name of the DTB to embed in the vmlinux binary
	  Leaving it blank selects the minimal "skeleton" dtb

409 410
source "kernel/Kconfig.preempt"

411 412 413 414
menu "Executable file formats"
source "fs/Kconfig.binfmt"
endmenu

415 416 417 418 419 420 421 422 423 424
endmenu	 # "ARC Architecture Configuration"

source "mm/Kconfig"
source "net/Kconfig"
source "drivers/Kconfig"
source "fs/Kconfig"
source "arch/arc/Kconfig.debug"
source "security/Kconfig"
source "crypto/Kconfig"
source "lib/Kconfig"
A
Alexey Brodkin 已提交
425
source "kernel/power/Kconfig"