1 # SPDX-License-Identifier: GPL-2.0-only <<
2 # 1 #
3 # Copyright (C) 2004, 2007-2010, 2011-2012 Syn !! 2 # For a description of the syntax of this configuration file,
>> 3 # see Documentation/kbuild/kconfig-language.txt.
4 # 4 #
>> 5 config ALPHA
>> 6 bool
>> 7 default y
>> 8 help
>> 9 The Alpha is a 64-bit general-purpose processor designed and
>> 10 marketed by the Digital Equipment Corporation of blessed memory,
>> 11 now Hewlett-Packard. The Alpha Linux project has a home page at
>> 12 <http://www.alphalinux.org/>.
5 13
6 config ARC !! 14 config 64BIT
7 def_bool y <<
8 select ARC_TIMERS <<
9 select ARCH_HAS_CACHE_LINE_SIZE <<
10 select ARCH_HAS_DEBUG_VM_PGTABLE <<
11 select ARCH_HAS_DMA_PREP_COHERENT <<
12 select ARCH_HAS_PTE_SPECIAL <<
13 select ARCH_HAS_SETUP_DMA_OPS <<
14 select ARCH_HAS_SYNC_DMA_FOR_CPU <<
15 select ARCH_HAS_SYNC_DMA_FOR_DEVICE <<
16 select ARCH_NEED_CMPXCHG_1_EMU <<
17 select ARCH_SUPPORTS_ATOMIC_RMW if ARC <<
18 select ARCH_32BIT_OFF_T <<
19 select BUILDTIME_TABLE_SORT <<
20 select CLONE_BACKWARDS <<
21 select COMMON_CLK <<
22 select DMA_DIRECT_REMAP <<
23 select GENERIC_ATOMIC64 if !ISA_ARCV2 <<
24 # for now, we don't need GENERIC_IRQ_P <<
25 select GENERIC_IRQ_SHOW <<
26 select GENERIC_PCI_IOMAP <<
27 select GENERIC_PENDING_IRQ if SMP <<
28 select GENERIC_SCHED_CLOCK <<
29 select GENERIC_SMP_IDLE_THREAD <<
30 select GENERIC_IOREMAP <<
31 select GENERIC_STRNCPY_FROM_USER if MM <<
32 select GENERIC_STRNLEN_USER if MMU <<
33 select HAVE_ARCH_KGDB <<
34 select HAVE_ARCH_TRACEHOOK <<
35 select HAVE_ARCH_TRANSPARENT_HUGEPAGE <<
36 select HAVE_DEBUG_STACKOVERFLOW <<
37 select HAVE_DEBUG_KMEMLEAK <<
38 select HAVE_IOREMAP_PROT <<
39 select HAVE_KERNEL_GZIP <<
40 select HAVE_KERNEL_LZMA <<
41 select HAVE_KPROBES <<
42 select HAVE_KRETPROBES <<
43 select HAVE_REGS_AND_STACK_ACCESS_API <<
44 select HAVE_MOD_ARCH_SPECIFIC <<
45 select HAVE_PERF_EVENTS <<
46 select HAVE_SYSCALL_TRACEPOINTS <<
47 select IRQ_DOMAIN <<
48 select LOCK_MM_AND_FIND_VMA <<
49 select MODULES_USE_ELF_RELA <<
50 select OF <<
51 select OF_EARLY_FLATTREE <<
52 select PCI_SYSCALL if PCI <<
53 select HAVE_ARCH_JUMP_LABEL if ISA_ARC <<
54 select TRACE_IRQFLAGS_SUPPORT <<
55 select HAVE_EBPF_JIT if ISA_ARCV2 <<
56 <<
57 config LOCKDEP_SUPPORT <<
58 def_bool y <<
59 <<
60 config SCHED_OMIT_FRAME_POINTER <<
61 def_bool y 15 def_bool y
62 16
63 config GENERIC_CSUM !! 17 config MMU
64 def_bool y !! 18 bool
>> 19 default y
65 20
66 config ARCH_FLATMEM_ENABLE !! 21 config UID16
67 def_bool y !! 22 bool
68 23
69 config MMU !! 24 config RWSEM_GENERIC_SPINLOCK
70 def_bool y !! 25 bool
71 26
72 config NO_IOPORT_MAP !! 27 config RWSEM_XCHGADD_ALGORITHM
73 def_bool y !! 28 bool
>> 29 default y
74 30
75 config GENERIC_CALIBRATE_DELAY !! 31 config GENERIC_ISA_DMA
76 def_bool y !! 32 bool
>> 33 default y
77 34
78 config GENERIC_HWEIGHT !! 35 source "init/Kconfig"
79 def_bool y <<
80 36
81 config STACKTRACE_SUPPORT <<
82 def_bool y <<
83 select STACKTRACE <<
84 37
85 menu "ARC Architecture Configuration" !! 38 menu "System setup"
86 39
87 menu "ARC Platform/SoC/Board" !! 40 choice
>> 41 prompt "Alpha system type"
>> 42 default ALPHA_GENERIC
>> 43 ---help---
>> 44 This is the system type of your hardware. A "generic" kernel will
>> 45 run on any supported Alpha system. However, if you configure a
>> 46 kernel for your specific system, it will be faster and smaller.
88 47
89 source "arch/arc/plat-tb10x/Kconfig" !! 48 To find out what type of Alpha system you have, you may want to
90 source "arch/arc/plat-axs10x/Kconfig" !! 49 check out the Linux/Alpha FAQ, accessible on the WWW from
91 source "arch/arc/plat-hsdk/Kconfig" !! 50 <http://www.alphalinux.org/>. In summary:
92 51
93 endmenu !! 52 Alcor/Alpha-XLT AS 600
>> 53 Alpha-XL XL-233, XL-266
>> 54 AlphaBook1 Alpha laptop
>> 55 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
>> 56 Cabriolet AlphaPC64, AlphaPCI64
>> 57 DP264 DP264
>> 58 EB164 EB164 21164 evaluation board
>> 59 EB64+ EB64+ 21064 evaluation board
>> 60 EB66 EB66 21066 evaluation board
>> 61 EB66+ EB66+ 21066 evaluation board
>> 62 Jensen DECpc 150, DEC 2000 model 300,
>> 63 DEC 2000 model 500
>> 64 LX164 AlphaPC164-LX
>> 65 Lynx AS 2100A
>> 66 Miata Personal Workstation 433a, 433au, 500a,
>> 67 500au, 600a, or 600au
>> 68 Marvel AlphaServer ES47 / ES80 / GS1280
>> 69 Mikasa AS 1000
>> 70 Noname AXPpci33, UDB (Multia)
>> 71 Noritake AS 1000A, AS 600A, AS 800
>> 72 PC164 AlphaPC164
>> 73 Rawhide AS 1200, AS 4000, AS 4100
>> 74 Ruffian RPX164-2, AlphaPC164-UX, AlphaPC164-BX
>> 75 SX164 AlphaPC164-SX
>> 76 Sable AS 2000, AS 2100
>> 77 Shark DS 20L
>> 78 Takara Takara
>> 79 Titan AlphaServer ES45 / DS25
>> 80 Wildfire AlphaServer GS 40/80/160/320
94 81
95 choice !! 82 If you don't know what to do, choose "generic".
96 prompt "ARC Instruction Set" <<
97 default ISA_ARCV2 <<
98 83
99 config ISA_ARCOMPACT !! 84 config ALPHA_GENERIC
100 bool "ARCompact ISA" !! 85 bool "Generic"
101 select CPU_NO_EFFICIENT_FFS <<
102 help 86 help
103 The original ARC ISA of ARC600/700 c !! 87 A generic kernel will run on all supported Alpha hardware.
104 88
105 config ISA_ARCV2 !! 89 config ALPHA_ALCOR
106 bool "ARC ISA v2" !! 90 bool "Alcor/Alpha-XLT"
107 select ARC_TIMERS_64BIT <<
108 help 91 help
109 ISA for the Next Generation ARC-HS c !! 92 For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
110 !! 93 slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
111 endchoice !! 94 Address, CIA) - a 383 pin plastic PGA). It provides a DRAM
112 !! 95 controller (256-bit memory bus) and a PCI interface. It also does
113 menu "ARC CPU Configuration" !! 96 all the work required to support an external Bcache and to maintain
>> 97 memory coherence when a PCI device DMAs into (or out of) memory.
114 98
115 choice !! 99 config ALPHA_XL
116 prompt "ARC Core" !! 100 bool "Alpha-XL"
117 default ARC_CPU_770 if ISA_ARCOMPACT !! 101 help
118 default ARC_CPU_HS if ISA_ARCV2 !! 102 XL-233 and XL-266-based Alpha systems.
119 <<
120 config ARC_CPU_770 <<
121 bool "ARC770" <<
122 depends on ISA_ARCOMPACT <<
123 select ARC_HAS_SWAPE <<
124 help <<
125 Support for ARC770 core introduced w <<
126 This core has a bunch of cool new fe <<
127 -MMU-v3: Variable Page Sz (4k, 8k, 1 <<
128 Shared Address Spaces (for <<
129 -Caches: New Prog Model, Region Flus <<
130 -Insns: endian swap, load-locked/sto <<
131 <<
132 config ARC_CPU_HS <<
133 bool "ARC-HS" <<
134 depends on ISA_ARCV2 <<
135 help <<
136 Support for ARC HS38x Cores based on <<
137 The notable features are: <<
138 - SMP configurations of up to 4 co <<
139 - Optional L2 Cache and IO-Coheren <<
140 - Revised Interrupt Architecture ( <<
141 auto stack switch, auto regfil <<
142 - MMUv4 (PIPT dcache, Huge Pages) <<
143 - Instructions for <<
144 * 64bit load/store: LDD, STD <<
145 * Hardware assisted divide/rem <<
146 * Function prologue/epilogue: <<
147 * IRQ enable/disable: CLRI, SE <<
148 * pop count: FFS, FLS <<
149 * SETcc, BMSKN, XBFU... <<
150 103
151 endchoice !! 104 config ALPHA_BOOK1
>> 105 bool "AlphaBook1"
>> 106 help
>> 107 Dec AlphaBook1/Burns Alpha-based laptops.
152 108
153 config ARC_TUNE_MCPU !! 109 config ALPHA_AVANTI_CH
154 string "Override default -mcpu compile !! 110 bool "Avanti"
155 default "" <<
156 help <<
157 Override default -mcpu=xxx compiler <<
158 the ISA version) with the specified <<
159 NOTE: If specified flag isn't suppor <<
160 ISA default value will be used as a <<
161 111
162 config CPU_BIG_ENDIAN !! 112 config ALPHA_CABRIOLET
163 bool "Enable Big Endian Mode" !! 113 bool "Cabriolet"
164 help 114 help
165 Build kernel for Big Endian Mode of !! 115 Cabriolet AlphaPC64, AlphaPCI64 systems. Derived from EB64+ but now
>> 116 baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
>> 117 slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
>> 118 Bcache SIMMs. Requires power supply with 3.3V output.
166 119
167 config SMP !! 120 config ALPHA_DP264
168 bool "Symmetric Multi-Processing" !! 121 bool "DP264"
169 select ARC_MCIP if ISA_ARCV2 <<
170 help 122 help
171 This enables support for systems wit !! 123 Various 21264 systems with the tsunami core logic chipset.
>> 124 API Networks: 264DP, UP2000(+), CS20;
>> 125 Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
172 126
173 if SMP !! 127 config ALPHA_EB164
>> 128 bool "EB164"
>> 129 help
>> 130 EB164 21164 evaluation board from DEC. Uses 21164 and ALCOR. Has
>> 131 ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
>> 132 shared with an ISA slot) and 2 32-bit PCI slots. Uses plus-in
>> 133 Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
>> 134 MOUSE (PS2 style), RTC/NVRAM. Boot ROM is Flash. PC-AT-sized
>> 135 motherboard. Requires power supply with 3.3V output.
174 136
175 config NR_CPUS !! 137 config ALPHA_EB64P_CH
176 int "Maximum number of CPUs (2-4096)" !! 138 bool "EB64+"
177 range 2 4096 <<
178 default "4" <<
179 139
180 config ARC_SMP_HALT_ON_RESET !! 140 config ALPHA_EB66
181 bool "Enable Halt-on-reset boot mode" !! 141 bool "EB66"
182 help 142 help
183 In SMP configuration cores can be co !! 143 A Digital DS group board. Uses 21066 or 21066A. I/O sub-system is
184 or they could all start at same time !! 144 identical to EB64+. Baby PC-AT size. Runs from standard PC power
185 masters are parked until Master kick !! 145 supply. The EB66 schematic was published as a marketing poster
186 at designated entry point. For other !! 146 advertising the 21066 as "the first microprocessor in the world with
187 entry point and spin wait for Master !! 147 embedded PCI".
188 <<
189 endif #SMP <<
190 148
191 config ARC_MCIP !! 149 config ALPHA_EB66P
192 bool "ARConnect Multicore IP (MCIP) Su !! 150 bool "EB66+"
193 depends on ISA_ARCV2 <<
194 default y if SMP <<
195 help 151 help
196 This IP block enables SMP in ARC-HS3 !! 152 Later variant of the EB66 board.
197 It provides for cross-core interrupt <<
198 hardware semaphores, shared memory,. <<
199 153
200 menuconfig ARC_CACHE !! 154 config ALPHA_EIGER
201 bool "Enable Cache Support" !! 155 bool "Eiger"
202 default y !! 156 help
>> 157 Apparently an obscure OEM single-board computer based on the
>> 158 Typhoon/Tsunami chipset family. Information on it is scanty.
203 159
204 if ARC_CACHE !! 160 config ALPHA_JENSEN
>> 161 bool "Jensen"
>> 162 help
>> 163 DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
>> 164 of the first-generation Alpha systems. A number of these systems
>> 165 seem to be available on the second- hand market. The Jensen is a
>> 166 floor-standing tower system which originally used a 150MHz 21064 It
>> 167 used programmable logic to interface a 486 EISA I/O bridge to the
>> 168 CPU.
205 169
206 config ARC_CACHE_LINE_SHIFT !! 170 config ALPHA_LX164
207 int "Cache Line Length (as power of 2) !! 171 bool "LX164"
208 range 5 7 <<
209 default "6" <<
210 help 172 help
211 Starting with ARC700 4.9, Cache line !! 173 A technical overview of this board is available at
212 This option specifies "N", with Line !! 174 <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
213 So line lengths of 32, 64, 128 are s <<
214 Linux only supports same line length <<
215 175
216 config ARC_HAS_ICACHE !! 176 config ALPHA_LYNX
217 bool "Use Instruction Cache" !! 177 bool "Lynx"
218 default y !! 178 help
>> 179 AlphaServer 2100A-based systems.
219 180
220 config ARC_HAS_DCACHE !! 181 config ALPHA_MARVEL
221 bool "Use Data Cache" !! 182 bool "Marvel"
222 default y !! 183 help
>> 184 AlphaServer ES47 / ES80 / GS1280 based on EV7.
223 185
224 config ARC_CACHE_PAGES !! 186 config ALPHA_MIATA
225 bool "Per Page Cache Control" !! 187 bool "Miata"
226 default y <<
227 depends on ARC_HAS_ICACHE || ARC_HAS_D <<
228 help 188 help
229 This can be used to over-ride the gl !! 189 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
230 per-page basis (but only for pages a !! 190 or 600au). There is an Installation HOWTO for this hardware at
231 Kernel Virtual address or User Virtu !! 191 <http://members.brabant.chello.nl/~s.vandereijk/miata.html>.
232 TLB entries have a per-page Cache En <<
233 Note that Global I/D ENABLE + Per Pa <<
234 Global DISABLE + Per Page ENABLE won <<
235 192
236 endif #ARC_CACHE !! 193 config ALPHA_MIKASA
>> 194 bool "Mikasa"
>> 195 help
>> 196 AlphaServer 1000-based Alpha systems.
237 197
238 config ARC_HAS_ICCM !! 198 config ALPHA_NAUTILUS
239 bool "Use ICCM" !! 199 bool "Nautilus"
240 help 200 help
241 Single Cycle RAMS to store Fast Path !! 201 Alpha systems based on the AMD 751 & ALI 1543C chipsets.
242 202
243 config ARC_ICCM_SZ !! 203 config ALPHA_NONAME_CH
244 int "ICCM Size in KB" !! 204 bool "Noname"
245 default "64" <<
246 depends on ARC_HAS_ICCM <<
247 205
248 config ARC_HAS_DCCM !! 206 config ALPHA_NORITAKE
249 bool "Use DCCM" !! 207 bool "Noritake"
250 help 208 help
251 Single Cycle RAMS to store Fast Path !! 209 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
>> 210 systems.
252 211
253 config ARC_DCCM_SZ !! 212 config ALPHA_PC164
254 int "DCCM Size in KB" !! 213 bool "PC164"
255 default "64" <<
256 depends on ARC_HAS_DCCM <<
257 214
258 config ARC_DCCM_BASE !! 215 config ALPHA_P2K
259 hex "DCCM map address" !! 216 bool "Platform2000"
260 default "0xA0000000" <<
261 depends on ARC_HAS_DCCM <<
262 217
263 choice !! 218 config ALPHA_RAWHIDE
264 prompt "MMU Version" !! 219 bool "Rawhide"
265 default ARC_MMU_V3 if ISA_ARCOMPACT !! 220 help
266 default ARC_MMU_V4 if ISA_ARCV2 !! 221 AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
267 !! 222 See HOWTO at
268 config ARC_MMU_V3 !! 223 <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
269 bool "MMU v3" <<
270 depends on ISA_ARCOMPACT <<
271 help <<
272 Introduced with ARC700 4.10: New Fea <<
273 Variable Page size (1k-16k), var JTL <<
274 Shared Address Spaces (SASID) <<
275 <<
276 config ARC_MMU_V4 <<
277 bool "MMU v4" <<
278 depends on ISA_ARCV2 <<
279 224
280 endchoice !! 225 config ALPHA_RUFFIAN
>> 226 bool "Ruffian"
>> 227 help
>> 228 Samsung APC164UX. There is a page on known problems and workarounds
>> 229 at <http://www.alphalinux.org/faq/FAQ-11.html>.
281 230
>> 231 config ALPHA_RX164
>> 232 bool "RX164"
282 233
283 choice !! 234 config ALPHA_SX164
284 prompt "MMU Page Size" !! 235 bool "SX164"
285 default ARC_PAGE_SIZE_8K <<
286 236
287 config ARC_PAGE_SIZE_8K !! 237 config ALPHA_SABLE
288 bool "8KB" !! 238 bool "Sable"
289 select HAVE_PAGE_SIZE_8KB !! 239 help
290 help !! 240 Digital AlphaServer 2000 and 2100-based systems.
291 Choose between 8k vs 16k <<
292 <<
293 config ARC_PAGE_SIZE_16K <<
294 select HAVE_PAGE_SIZE_16KB <<
295 bool "16KB" <<
296 <<
297 config ARC_PAGE_SIZE_4K <<
298 bool "4KB" <<
299 select HAVE_PAGE_SIZE_4KB <<
300 depends on ARC_MMU_V3 || ARC_MMU_V4 <<
301 241
302 endchoice !! 242 config ALPHA_SHARK
>> 243 bool "Shark"
303 244
304 choice !! 245 config ALPHA_TAKARA
305 prompt "MMU Super Page Size" !! 246 bool "Takara"
306 depends on ISA_ARCV2 && TRANSPARENT_HU !! 247 help
307 default ARC_HUGEPAGE_2M !! 248 Alpha 11164-based OEM single-board computer.
308 249
309 config ARC_HUGEPAGE_2M !! 250 config ALPHA_TITAN
310 bool "2MB" !! 251 bool "Titan"
>> 252 help
>> 253 AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
311 254
312 config ARC_HUGEPAGE_16M !! 255 config ALPHA_WILDFIRE
313 bool "16MB" !! 256 bool "Wildfire"
>> 257 help
>> 258 AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
314 259
315 endchoice 260 endchoice
316 261
317 config PGTABLE_LEVELS !! 262 # clear all implied options (don't want default values for those):
318 int "Number of Page table levels" !! 263 # Most of these machines have ISA slots; not exactly sure which don't,
319 default 2 !! 264 # and this doesn't activate hordes of code, so do it always.
320 !! 265 config ISA
321 config ARC_COMPACT_IRQ_LEVELS !! 266 bool
322 depends on ISA_ARCOMPACT !! 267 default y
323 bool "Setup Timer IRQ as high Priority !! 268 help
324 # if SMP, LV2 enabled ONLY if ARC impl !! 269 Find out whether you have ISA slots on your motherboard. ISA is the
325 depends on !SMP !! 270 name of a bus system, i.e. the way the CPU talks to the other stuff
>> 271 inside your box. Other bus systems are PCI, EISA, MicroChannel
>> 272 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
>> 273 newer boards don't support it. If you have ISA, say Y, otherwise N.
326 274
327 config ARC_FPU_SAVE_RESTORE !! 275 config PCI
328 bool "Enable FPU state persistence acr !! 276 bool
>> 277 depends on !ALPHA_JENSEN
>> 278 default y
329 help 279 help
330 ARCompact FPU has internal registers !! 280 Find out whether you have a PCI motherboard. PCI is the name of a
331 Floating Point operations. There are !! 281 bus system, i.e. the way the CPU talks to the other stuff inside
332 for floating point exceptions and ro !! 282 your box. Other bus systems are ISA, EISA, MicroChannel (MCA) or
333 preserved across task context switch !! 283 VESA. If you have PCI, say Y, otherwise N.
334 284
335 config ARC_CANT_LLSC !! 285 The PCI-HOWTO, available from
336 def_bool n !! 286 <http://www.tldp.org/docs.html#howto>, contains valuable
>> 287 information about which PCI hardware does work under Linux and which
>> 288 doesn't.
337 289
338 config ARC_HAS_LLSC !! 290 config PCI_DOMAINS
339 bool "Insn: LLOCK/SCOND (efficient ato !! 291 bool
340 default y 292 default y
341 depends on !ARC_CANT_LLSC <<
342 293
343 config ARC_HAS_SWAPE !! 294 config ALPHA_CORE_AGP
344 bool "Insn: SWAPE (endian-swap)" !! 295 bool
>> 296 depends on ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL
345 default y 297 default y
346 298
347 if ISA_ARCV2 !! 299 config ALPHA_NONAME
348 !! 300 bool
349 config ARC_USE_UNALIGNED_MEM_ACCESS !! 301 depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
350 bool "Enable unaligned access in HW" <<
351 default y 302 default y
352 select HAVE_EFFICIENT_UNALIGNED_ACCESS <<
353 help 303 help
354 The ARC HS architecture supports una !! 304 The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
355 which is disabled by default. Enable !! 305 UDB). This design was produced by Digital's Technical OEM (TOEM)
356 hardware and use software to use it !! 306 group. It uses the 21066 processor running at 166MHz or 233MHz. It
>> 307 is a baby-AT size, and runs from a standard PC power supply. It has
>> 308 5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
>> 309 2 versions, with either PS/2 or large DIN connectors for the
>> 310 keyboard.
357 311
358 config ARC_HAS_LL64 !! 312 config ALPHA_EV4
359 bool "Insn: 64bit LDD/STD" !! 313 bool
360 help !! 314 depends on ALPHA_JENSEN || (ALPHA_SABLE && !ALPHA_GAMMA) || ALPHA_LYNX || ALPHA_NORITAKE && !ALPHA_PRIMO || ALPHA_MIKASA && !ALPHA_PRIMO || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL || ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
361 Enable gcc to generate 64-bit load/s !! 315 default y if !ALPHA_LYNX
362 ISA mandates even/odd registers to a !! 316
363 dest operands with 2 possible source !! 317 config ALPHA_LCA
>> 318 bool
>> 319 depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
364 default y 320 default y
365 321
366 config ARC_HAS_DIV_REM !! 322 config ALPHA_APECS
367 bool "Insn: div, divu, rem, remu" !! 323 bool
>> 324 depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
368 default y 325 default y
369 326
370 config ARC_HAS_ACCL_REGS !! 327 config ALPHA_EB64P
371 bool "Reg Pair ACCL:ACCH (FPU and/or M !! 328 bool
>> 329 depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
372 default y 330 default y
373 help 331 help
374 Depending on the configuration, CPU !! 332 Uses 21064 or 21064A and APECs. Has ISA and PCI expansion (3 ISA,
375 (also referred to as r58:r59). These !! 333 2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
376 kernel needs to save/restore per pro !! 334 ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
>> 335 (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
>> 336 SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM. PC-AT size.
>> 337 Runs from standard PC power supply.
377 338
378 config ARC_DSP_HANDLED !! 339 config ALPHA_EV5
379 def_bool n !! 340 bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
>> 341 default y if ALPHA_RX164 || ALPHA_RAWHIDE || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_SABLE && ALPHA_GAMMA || ALPHA_NORITAKE && ALPHA_PRIMO || ALPHA_MIKASA && ALPHA_PRIMO || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_EB164 || ALPHA_ALCOR
380 342
381 config ARC_DSP_SAVE_RESTORE_REGS !! 343 config ALPHA_EV4
382 def_bool n !! 344 bool
>> 345 default y if ALPHA_LYNX && !ALPHA_EV5
383 346
384 choice !! 347 config ALPHA_CIA
385 prompt "DSP support" !! 348 bool
386 default ARC_DSP_NONE !! 349 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_NORITAKE && ALPHA_PRIMO || ALPHA_MIKASA && ALPHA_PRIMO || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_EB164 || ALPHA_ALCOR
387 help !! 350 default y
388 Depending on the configuration, CPU <<
389 (ACC0_GLO, ACC0_GHI, DSP_BFLY0, DSP_ <<
390 Below are options describing how to <<
391 interrupt entry / exit and in contex <<
392 <<
393 config ARC_DSP_NONE <<
394 bool "No DSP extension presence in HW" <<
395 help <<
396 No DSP extension presence in HW <<
397 <<
398 config ARC_DSP_KERNEL <<
399 bool "DSP extension in HW, no support <<
400 select ARC_HAS_ACCL_REGS <<
401 select ARC_DSP_HANDLED <<
402 help <<
403 DSP extension presence in HW, no sup <<
404 applications. We don't save / restor <<
405 some minimal preparations so userspa <<
406 <<
407 config ARC_DSP_USERSPACE <<
408 bool "Support DSP for userspace apps" <<
409 select ARC_HAS_ACCL_REGS <<
410 select ARC_DSP_HANDLED <<
411 select ARC_DSP_SAVE_RESTORE_REGS <<
412 help <<
413 DSP extension presence in HW, suppor <<
414 run DSP-enabled userspace applicatio <<
415 <<
416 config ARC_DSP_AGU_USERSPACE <<
417 bool "Support DSP with AGU for userspa <<
418 select ARC_HAS_ACCL_REGS <<
419 select ARC_DSP_HANDLED <<
420 select ARC_DSP_SAVE_RESTORE_REGS <<
421 help <<
422 DSP and AGU extensions presence in H <<
423 and AGU registers to run DSP-enabled <<
424 endchoice <<
425 351
426 config ARC_IRQ_NO_AUTOSAVE !! 352 config ALPHA_EV56
427 bool "Disable hardware autosave regfil !! 353 bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
428 default n !! 354 default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
>> 355
>> 356 config ALPHA_EV56
>> 357 prompt "EV56 CPU (speed >= 333MHz)?"
>> 358 depends on ALPHA_NORITAKE && ALPHA_PRIMO
>> 359
>> 360 config ALPHA_EV56
>> 361 prompt "EV56 CPU (speed >= 400MHz)?"
>> 362 depends on ALPHA_RAWHIDE
>> 363
>> 364 config ALPHA_PRIMO
>> 365 bool "EV5 CPU daughtercard (model 5/xxx)?"
>> 366 depends on ALPHA_NORITAKE || ALPHA_MIKASA
429 help 367 help
430 On HS cores, taken interrupt auto sa !! 368 Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
431 This is programmable and can be opti <<
432 software INTERRUPT_PROLOGUE/EPILGUE <<
433 369
434 config ARC_LPB_DISABLE !! 370 config ALPHA_GAMMA
435 bool "Disable loop buffer (LPB)" !! 371 bool "EV5 CPU(s) (model 5/xxx)?"
>> 372 depends on ALPHA_SABLE
436 help 373 help
437 On HS cores, loop buffer (LPB) is pr !! 374 Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
438 be optionally disabled. <<
439 375
440 endif # ISA_ARCV2 !! 376 config ALPHA_GAMMA
>> 377 bool
>> 378 depends on ALPHA_LYNX
>> 379 default y
441 380
442 endmenu # "ARC CPU Configuration" !! 381 config ALPHA_T2
>> 382 bool
>> 383 depends on ALPHA_SABLE || ALPHA_LYNX
>> 384 default y
443 385
444 config LINUX_LINK_BASE !! 386 config ALPHA_PYXIS
445 hex "Kernel link address" !! 387 bool
446 default "0x80000000" !! 388 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
447 help !! 389 default y
448 ARC700 divides the 32 bit phy addres <<
449 -Lower 2G (0 - 0x7FFF_FFFF ) is user <<
450 -Upper 2G (0x8000_0000 onwards) is u <<
451 Typically Linux kernel is linked at <<
452 hence the default value of 0x8zs. <<
453 However some customers have peripher <<
454 Linux needs to be scooted a bit. <<
455 If you don't know what the above mea <<
456 This needs to match memory start add <<
457 390
458 config LINUX_RAM_BASE !! 391 config ALPHA_EV6
459 hex "RAM base address" !! 392 bool
460 default LINUX_LINK_BASE !! 393 depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
461 help !! 394 default y
462 By default Linux is linked at base o <<
463 cases (such as HSDK), Linux can't be <<
464 this option. <<
465 395
466 config HIGHMEM !! 396 config ALPHA_TSUNAMI
467 bool "High Memory Support" !! 397 bool
468 select HAVE_ARCH_PFN_VALID !! 398 depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
469 select KMAP_LOCAL !! 399 default y
470 help <<
471 With ARC 2G:2G address split, only u <<
472 kernel. Enable this to potentially a <<
473 in future <<
474 400
475 config ARC_HAS_PAE40 !! 401 config ALPHA_EV67
476 bool "Support for the 40-bit Physical !! 402 bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
477 depends on ISA_ARCV2 !! 403 default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
478 select HIGHMEM <<
479 select PHYS_ADDR_T_64BIT <<
480 help 404 help
481 Enable access to physical memory bey !! 405 Is this a machine based on the EV67 core? If in doubt, select N here
482 ARC cores with 40 bit Physical Addre !! 406 and the machine will be treated as an EV6.
483 407
484 config ARC_KVADDR_SIZE !! 408 config ALPHA_EV7
485 int "Kernel Virtual Address Space size !! 409 bool
486 range 0 512 !! 410 depends on ALPHA_MARVEL
487 default "256" !! 411 default y
488 help <<
489 The kernel address space is carved o <<
490 space for catering to vmalloc, modul <<
491 not suffice vmalloc requirements of <<
492 this to be stretched to 512 MB (by e <<
493 kernel-user gutter) <<
494 412
495 config ARC_CURR_IN_REG !! 413 config ALPHA_MCPCIA
496 bool "cache current task pointer in gp !! 414 bool
>> 415 depends on ALPHA_RAWHIDE
>> 416 default y
>> 417
>> 418 config ALPHA_POLARIS
>> 419 bool
>> 420 depends on ALPHA_RX164
497 default y 421 default y
498 help <<
499 This reserves gp register to point t <<
500 kernel mode eliding memory access fo <<
501 422
>> 423 config ALPHA_IRONGATE
>> 424 bool
>> 425 depends on ALPHA_NAUTILUS
>> 426 default y
502 427
503 config ARC_EMUL_UNALIGNED !! 428 config ALPHA_AVANTI
504 bool "Emulate unaligned memory access !! 429 bool
505 select SYSCTL_ARCH_UNALIGN_NO_WARN !! 430 depends on ALPHA_XL || ALPHA_AVANTI_CH
506 select SYSCTL_ARCH_UNALIGN_ALLOW !! 431 default y
507 depends on ISA_ARCOMPACT <<
508 help 432 help
509 This enables misaligned 16 & 32 bit !! 433 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
510 Use ONLY-IF-ABS-NECESSARY as it will !! 434 Alphas. Info at
511 potential bugs in code !! 435 <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
512 436
513 config HZ !! 437 config ALPHA_BROKEN_IRQ_MASK
514 int "Timer Frequency" !! 438 bool
515 default 100 !! 439 depends on ALPHA_GENERIC || ALPHA_PC164
>> 440 default y
516 441
517 config ARC_METAWARE_HLINK !! 442 config ALPHA_SRM
518 bool "Support for Metaware debugger as !! 443 bool "Use SRM as bootloader" if ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_EB164 || ALPHA_ALCOR || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_NAUTILUS || ALPHA_NONAME
519 help !! 444 default y if ALPHA_JENSEN || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_LYNX || ALPHA_NORITAKE || ALPHA_DP264 || ALPHA_RAWHIDE || ALPHA_EIGER || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
520 This options allows a Linux userland !! 445 ---help---
521 host file system (open/creat/read/wr !! 446 There are two different types of booting firmware on Alphas: SRM,
522 Metaware Debugger. This can come in !! 447 which is command line driven, and ARC, which uses menus and arrow
523 when there is no real usable periphe !! 448 keys. Details about the Linux/Alpha booting process are contained in
>> 449 the Linux/Alpha FAQ, accessible on the WWW from
>> 450 <http://www.alphalinux.org/>.
524 451
525 menuconfig ARC_DBG !! 452 The usual way to load Linux on an Alpha machine is to use MILO
526 bool "ARC debugging" !! 453 (a bootloader that lets you pass command line parameters to the
>> 454 kernel just like lilo does for the x86 architecture) which can be
>> 455 loaded either from ARC or can be installed directly as a permanent
>> 456 firmware replacement from floppy (which requires changing a certain
>> 457 jumper on the motherboard). If you want to do either of these, say N
>> 458 here. If MILO doesn't work on your system (true for Jensen
>> 459 motherboards), you can bypass it altogether and boot Linux directly
>> 460 from an SRM console; say Y here in order to do that. Note that you
>> 461 won't be able to boot from an IDE disk using SRM.
>> 462
>> 463 If unsure, say N.
>> 464
>> 465 config EARLY_PRINTK
>> 466 bool
>> 467 depends on ALPHA_GENERIC || ALPHA_SRM
527 default y 468 default y
528 469
529 if ARC_DBG !! 470 config EISA
>> 471 bool
>> 472 depends on ALPHA_GENERIC || ALPHA_JENSEN || ALPHA_ALCOR || ALPHA_MIKASA || ALPHA_SABLE || ALPHA_LYNX || ALPHA_NORITAKE || ALPHA_RAWHIDE
>> 473 default y
530 474
531 config ARC_DW2_UNWIND !! 475 config SMP
532 bool "Enable DWARF specific kernel sta !! 476 bool "Symmetric multi-processing support"
>> 477 depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
>> 478 ---help---
>> 479 This enables support for systems with more than one CPU. If you have
>> 480 a system with only one CPU, like most personal computers, say N. If
>> 481 you have a system with more than one CPU, say Y.
>> 482
>> 483 If you say N here, the kernel will run on single and multiprocessor
>> 484 machines, but will use only one CPU of a multiprocessor machine. If
>> 485 you say Y here, the kernel will run on many, but not all,
>> 486 singleprocessor machines. On a singleprocessor machine, the kernel
>> 487 will run faster if you say N here.
>> 488
>> 489 Note that if you say Y here and choose architecture "586" or
>> 490 "Pentium" under "Processor family", the kernel will not work on 486
>> 491 architectures. Similarly, multiprocessor kernels for the "PPro"
>> 492 architecture may not work on all Pentium based boards.
>> 493
>> 494 People using multiprocessor machines who say Y here should also say
>> 495 Y to "Enhanced Real Time Clock Support", below. The "Advanced Power
>> 496 Management" code will be disabled if you say Y here.
>> 497
>> 498 See also the <file:Documentation/smp.tex>,
>> 499 <file:Documentation/smp.txt>, <file:Documentation/i386/IO-APIC.txt>,
>> 500 <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO available at
>> 501 <http://www.tldp.org/docs.html#howto>.
>> 502
>> 503 If you don't know what to do here, say N.
>> 504
>> 505 config HAVE_DEC_LOCK
>> 506 bool
>> 507 depends on SMP
533 default y 508 default y
534 select KALLSYMS <<
535 help <<
536 Compiles the kernel with DWARF unwin <<
537 to get stack backtraces. <<
538 509
539 If you say Y here the resulting kern !! 510 config NR_CPUS
540 but not slower, and it will give ver !! 511 int "Maximum number of CPUs (2-64)"
541 If you don't debug the kernel, you c !! 512 depends on SMP
542 to solve problems without frame unwi !! 513 default "64"
543 514
544 config ARC_DBG_JUMP_LABEL !! 515 config DISCONTIGMEM
545 bool "Paranoid checks in Static Keys ( !! 516 bool "Discontiguous Memory Support (EXPERIMENTAL)"
546 depends on JUMP_LABEL !! 517 depends on EXPERIMENTAL
547 default y if STATIC_KEYS_SELFTEST !! 518 help
548 help !! 519 Say Y to upport efficient handling of discontiguous physical memory,
549 Enable paranoid checks and self-test !! 520 for architectures which are either NUMA (Non-Uniform Memory Access)
550 part of static keys (jump labels) re !! 521 or have huge holes in the physical address space for other reasons.
>> 522 See <file:Documentation/vm/numa> for more.
>> 523
>> 524 config NUMA
>> 525 bool "NUMA Support (EXPERIMENTAL)"
>> 526 depends on DISCONTIGMEM
>> 527 help
>> 528 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
>> 529 Access). This option is for configuring high-end multiprocessor
>> 530 server machines. If in doubt, say N.
>> 531
>> 532 # LARGE_VMALLOC is racy, if you *really* need it then fix it first
>> 533 config ALPHA_LARGE_VMALLOC
>> 534 bool
>> 535 ---help---
>> 536 Process creation and other aspects of virtual memory management can
>> 537 be streamlined if we restrict the kernel to one PGD for all vmalloc
>> 538 allocations. This equates to about 8GB.
>> 539
>> 540 Under normal circumstances, this is so far and above what is needed
>> 541 as to be laughable. However, there are certain applications (such
>> 542 as benchmark-grade in-kernel web serving) that can make use of as
>> 543 much vmalloc space as is available.
>> 544
>> 545 Say N unless you know you need gobs and gobs of vmalloc space.
>> 546
>> 547 config VERBOSE_MCHECK
>> 548 bool "Verbose Machine Checks"
>> 549
>> 550 config VERBOSE_MCHECK_ON
>> 551 int "Verbose Printing Mode (0=off, 1=on, 2=all)"
>> 552 depends on VERBOSE_MCHECK
>> 553 default 1
>> 554 ---help---
>> 555 This option allows the default printing mode to be set, and then
>> 556 possibly overridden by a boot command argument.
>> 557
>> 558 For example, if one wanted the option of printing verbose
>> 559 machine checks, but wanted the default to be as if verbose
>> 560 machine check printing was turned off, then one would choose
>> 561 the printing mode to be 0. Then, upon reboot, one could add
>> 562 the boot command line "verbose_mcheck=1" to get the normal
>> 563 verbose machine check printing, or "verbose_mcheck=2" to get
>> 564 the maximum information available.
>> 565
>> 566 Take the default (1) unless you want more control or more info.
>> 567
>> 568 source "drivers/pci/Kconfig"
>> 569 source "drivers/eisa/Kconfig"
>> 570
>> 571 config HOTPLUG
>> 572 bool "Support for hot-pluggable devices"
>> 573 ---help---
>> 574 Say Y here if you want to plug devices into your computer while
>> 575 the system is running, and be able to use them quickly. In many
>> 576 cases, the devices can likewise be unplugged at any time too.
>> 577
>> 578 One well known example of this is PCMCIA- or PC-cards, credit-card
>> 579 size devices such as network cards, modems or hard drives which are
>> 580 plugged into slots found on all modern laptop computers. Another
>> 581 example, used on modern desktops as well as laptops, is USB.
>> 582
>> 583 Enable HOTPLUG and KMOD, and build a modular kernel. Get agent
>> 584 software (at <http://linux-hotplug.sourceforge.net/>) and install it.
>> 585 Then your kernel will automatically call out to a user mode "policy
>> 586 agent" (/sbin/hotplug) to load modules and set up software needed
>> 587 to use devices as you hotplug them.
>> 588
>> 589 source "drivers/pcmcia/Kconfig"
>> 590
>> 591 config SRM_ENV
>> 592 tristate "SRM environment through procfs"
>> 593 depends on PROC_FS
>> 594 ---help---
>> 595 If you enable this option, a subdirectory inside /proc called
>> 596 /proc/srm_environment will give you access to the all important
>> 597 SRM environment variables (those which have a name) and also
>> 598 to all others (by their internal number).
>> 599
>> 600 SRM is something like a BIOS for Alpha machines. There are some
>> 601 other such BIOSes, like AlphaBIOS, which this driver cannot
>> 602 support (hey, that's not SRM!).
>> 603
>> 604 Despite the fact that this driver doesn't work on all Alphas (but
>> 605 only on those which have SRM as their firmware), it's save to
>> 606 build it even if your particular machine doesn't know about SRM
>> 607 (or if you intend to compile a generic kernel). It will simply
>> 608 not create those subdirectory in /proc (and give you some warning,
>> 609 of course).
>> 610
>> 611 This driver is also available as a module and will be called
>> 612 srm_env then.
>> 613
>> 614 source "fs/Kconfig.binfmt"
>> 615
>> 616 source "drivers/parport/Kconfig"
>> 617
>> 618 endmenu
>> 619
>> 620 source "drivers/base/Kconfig"
>> 621
>> 622 source "drivers/mtd/Kconfig"
>> 623
>> 624 source "drivers/pnp/Kconfig"
>> 625
>> 626 source "drivers/block/Kconfig"
>> 627
>> 628 source "drivers/md/Kconfig"
>> 629
>> 630 source "drivers/ide/Kconfig"
>> 631
>> 632 source "drivers/scsi/Kconfig"
>> 633
>> 634 if PCI
>> 635 source "drivers/message/fusion/Kconfig"
551 endif 636 endif
552 637
553 config ARC_BUILTIN_DTB_NAME !! 638 source "drivers/ieee1394/Kconfig"
554 string "Built in DTB" !! 639
555 help !! 640 source "net/Kconfig"
556 Set the name of the DTB to embed in !! 641
557 Leaving it blank selects the "nsim_7 !! 642 source "drivers/isdn/Kconfig"
>> 643
>> 644 source "drivers/cdrom/Kconfig"
>> 645
>> 646 source "drivers/input/Kconfig"
>> 647
>> 648 source "drivers/char/Kconfig"
>> 649
>> 650 #source drivers/misc/Config.in
>> 651 source "drivers/media/Kconfig"
>> 652
>> 653 source "fs/Kconfig"
>> 654
>> 655 source "drivers/video/Kconfig"
>> 656
>> 657 source "sound/Kconfig"
>> 658
>> 659 source "drivers/usb/Kconfig"
>> 660
>> 661 source "arch/alpha/oprofile/Kconfig"
>> 662
>> 663 menu "Kernel hacking"
>> 664
>> 665 config ALPHA_LEGACY_START_ADDRESS
>> 666 bool "Legacy kernel start address"
>> 667 depends on ALPHA_GENERIC
>> 668 default n
>> 669 ---help---
>> 670 The 2.4 kernel changed the kernel start address from 0x310000
>> 671 to 0x810000 to make room for the Wildfire's larger SRM console.
>> 672 Recent consoles on Titan and Marvel machines also require the
>> 673 extra room.
>> 674
>> 675 If you're using aboot 0.7 or later, the bootloader will examine the
>> 676 ELF headers to determine where to transfer control. Unfortunately,
>> 677 most older bootloaders -- APB or MILO -- hardcoded the kernel start
>> 678 address rather than examining the ELF headers, and the result is a
>> 679 hard lockup.
>> 680
>> 681 Say Y if you have a broken bootloader. Say N if you do not, or if
>> 682 you wish to run on Wildfire, Titan, or Marvel.
>> 683
>> 684 config ALPHA_LEGACY_START_ADDRESS
>> 685 bool
>> 686 depends on !ALPHA_GENERIC && !ALPHA_TITAN && !ALPHA_MARVEL && !ALPHA_WILDFIRE
>> 687 default y
>> 688
>> 689 config DEBUG_KERNEL
>> 690 bool "Kernel debugging"
>> 691 help
>> 692 Say Y here if you are developing drivers or trying to debug and
>> 693 identify kernel problems.
>> 694
>> 695 config MATHEMU
>> 696 tristate "Kernel FP software completion" if DEBUG_KERNEL
>> 697 default y if !DEBUG_KERNEL
>> 698 help
>> 699 This option is required for IEEE compliant floating point arithmetic
>> 700 on the Alpha. The only time you would ever not say Y is to say M in
>> 701 order to debug the code. Say Y unless you know what you are doing.
>> 702
>> 703 config DEBUG_SLAB
>> 704 bool "Debug memory allocations"
>> 705 depends on DEBUG_KERNEL
>> 706 help
>> 707 Say Y here to have the kernel do limited verification on memory
>> 708 allocation as well as poisoning memory on free to catch use of freed
>> 709 memory.
>> 710
>> 711 config MAGIC_SYSRQ
>> 712 bool "Magic SysRq key"
>> 713 depends on DEBUG_KERNEL
>> 714 help
>> 715 If you say Y here, you will have some control over the system even
>> 716 if the system crashes for example during kernel debugging (e.g., you
>> 717 will be able to flush the buffer cache to disk, reboot the system
>> 718 immediately or dump some status information). This is accomplished
>> 719 by pressing various keys while holding SysRq (Alt+PrintScreen). It
>> 720 also works on a serial console (on PC hardware at least), if you
>> 721 send a BREAK and then within 5 seconds a command keypress. The
>> 722 keys are documented in <file:Documentation/sysrq.txt>. Don't say Y
>> 723 unless you really know what this hack does.
>> 724
>> 725 config DEBUG_SPINLOCK
>> 726 bool "Spinlock debugging"
>> 727 depends on DEBUG_KERNEL
>> 728 help
>> 729 Say Y here and build SMP to catch missing spinlock initialization
>> 730 and certain other kinds of spinlock errors commonly made. This is
>> 731 best used in conjunction with the NMI watchdog so that spinlock
>> 732 deadlocks are also debuggable.
>> 733
>> 734 config DEBUG_RWLOCK
>> 735 bool "Read-write spinlock debugging"
>> 736 depends on DEBUG_KERNEL
>> 737 help
>> 738 If you say Y here then read-write lock processing will count how many
>> 739 times it has tried to get the lock and issue an error message after
>> 740 too many attempts. If you suspect a rwlock problem or a kernel
>> 741 hacker asks for this option then say Y. Otherwise say N.
>> 742
>> 743 config DEBUG_SEMAPHORE
>> 744 bool "Semaphore debugging"
>> 745 depends on DEBUG_KERNEL
>> 746 help
>> 747 If you say Y here then semaphore processing will issue lots of
>> 748 verbose debugging messages. If you suspect a semaphore problem or a
>> 749 kernel hacker asks for this option then say Y. Otherwise say N.
>> 750
>> 751 config DEBUG_INFO
>> 752 bool "Compile the kernel with debug info"
>> 753 depends on DEBUG_KERNEL
>> 754 help
>> 755 If you say Y here the resulting kernel image will include
>> 756 debugging info resulting in a larger kernel image.
>> 757 Say Y here only if you plan to use gdb to debug the kernel.
>> 758 If you don't debug the kernel, you can say N.
>> 759
>> 760 endmenu
>> 761
>> 762 source "security/Kconfig"
558 763
559 endmenu # "ARC Architecture Configuration" !! 764 source "crypto/Kconfig"
560 765
561 config ARCH_FORCE_MAX_ORDER !! 766 source "lib/Kconfig"
562 int "Maximum zone order" <<
563 default "11" if ARC_HUGEPAGE_16M <<
564 default "10" <<
565 767
566 source "kernel/power/Kconfig" <<
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