1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 # !! 2 config ALPHA
3 # For a description of the syntax of this conf !! 3 bool
4 # see Documentation/kbuild/kconfig-language.rs !! 4 default y
5 # !! 5 select ARCH_32BIT_USTAT_F_TINODE
6 !! 6 select ARCH_HAS_CURRENT_STACK_POINTER
7 config OPENRISC !! 7 select ARCH_MIGHT_HAVE_PC_PARPORT
8 def_bool y !! 8 select ARCH_MIGHT_HAVE_PC_SERIO
9 select ARCH_32BIT_OFF_T !! 9 select ARCH_NO_PREEMPT
10 select ARCH_HAS_DMA_SET_UNCACHED !! 10 select ARCH_NO_SG_CHAIN
11 select ARCH_HAS_DMA_CLEAR_UNCACHED !! 11 select ARCH_USE_CMPXCHG_LOCKREF
12 select ARCH_HAS_SYNC_DMA_FOR_DEVICE !! 12 select DMA_OPS if PCI
13 select COMMON_CLK !! 13 select FORCE_PCI
14 select OF !! 14 select PCI_DOMAINS if PCI
15 select OF_EARLY_FLATTREE !! 15 select PCI_SYSCALL if PCI
16 select IRQ_DOMAIN !! 16 select HAVE_ASM_MODVERSIONS
17 select GPIOLIB !! 17 select HAVE_PAGE_SIZE_8KB
18 select HAVE_ARCH_TRACEHOOK !! 18 select HAVE_PCSPKR_PLATFORM
19 select SPARSE_IRQ !! 19 select HAVE_PERF_EVENTS
20 select GENERIC_IRQ_CHIP !! 20 select NEED_DMA_MAP_STATE
>> 21 select NEED_SG_DMA_LENGTH
21 select GENERIC_IRQ_PROBE 22 select GENERIC_IRQ_PROBE
22 select GENERIC_IRQ_SHOW <<
23 select GENERIC_PCI_IOMAP 23 select GENERIC_PCI_IOMAP
24 select GENERIC_IOREMAP !! 24 select AUTO_IRQ_AFFINITY if SMP
25 select GENERIC_CPU_DEVICES !! 25 select GENERIC_IRQ_SHOW
26 select HAVE_PCI !! 26 select ARCH_WANT_IPC_PARSE_VERSION
27 select HAVE_UID16 !! 27 select ARCH_HAVE_NMI_SAFE_CMPXCHG
28 select HAVE_PAGE_SIZE_8KB !! 28 select AUDIT_ARCH
29 select GENERIC_ATOMIC64 !! 29 select GENERIC_CPU_VULNERABILITIES
30 select GENERIC_CLOCKEVENTS_BROADCAST <<
31 select GENERIC_SMP_IDLE_THREAD 30 select GENERIC_SMP_IDLE_THREAD
>> 31 select HAS_IOPORT
>> 32 select HAVE_ARCH_AUDITSYSCALL
>> 33 select HAVE_MOD_ARCH_SPECIFIC
>> 34 select LOCK_MM_AND_FIND_VMA
32 select MODULES_USE_ELF_RELA 35 select MODULES_USE_ELF_RELA
33 select HAVE_DEBUG_STACKOVERFLOW !! 36 select ODD_RT_SIGACTION
34 select OR1K_PIC !! 37 select OLD_SIGSUSPEND
35 select CPU_NO_EFFICIENT_FFS if !OPENRI !! 38 select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67
36 select ARCH_USE_QUEUED_RWLOCKS !! 39 select MMU_GATHER_NO_RANGE
37 select OMPIC if SMP !! 40 select SPARSEMEM_EXTREME if SPARSEMEM
38 select PCI_DOMAINS_GENERIC if PCI !! 41 select ZONE_DMA
39 select PCI_MSI if PCI !! 42 help
40 select ARCH_WANT_FRAME_POINTERS !! 43 The Alpha is a 64-bit general-purpose processor designed and
41 select GENERIC_IRQ_MULTI_HANDLER !! 44 marketed by the Digital Equipment Corporation of blessed memory,
42 select MMU_GATHER_NO_RANGE if MMU !! 45 now Hewlett-Packard. The Alpha Linux project has a home page at
43 select TRACE_IRQFLAGS_SUPPORT !! 46 <http://www.alphalinux.org/>.
44 47
45 config CPU_BIG_ENDIAN !! 48 config 64BIT
46 def_bool y 49 def_bool y
47 50
48 config MMU 51 config MMU
49 def_bool y !! 52 bool
>> 53 default y
50 54
51 config GENERIC_HWEIGHT !! 55 config ARCH_HAS_ILOG2_U32
52 def_bool y !! 56 bool
>> 57 default n
53 58
54 config NO_IOPORT_MAP !! 59 config ARCH_HAS_ILOG2_U64
55 def_bool y !! 60 bool
>> 61 default n
56 62
57 # For now, use generic checksum functions !! 63 config GENERIC_CALIBRATE_DELAY
58 #These can be reimplemented in assembly later !! 64 bool
59 config GENERIC_CSUM !! 65 default y
60 def_bool y <<
61 66
62 config STACKTRACE_SUPPORT !! 67 config GENERIC_ISA_DMA
63 def_bool y !! 68 bool
>> 69 default y
>> 70
>> 71 config PGTABLE_LEVELS
>> 72 int
>> 73 default 3
64 74
65 config LOCKDEP_SUPPORT !! 75 config AUDIT_ARCH
66 def_bool y !! 76 bool
67 77
68 menu "Processor type and features" !! 78 menu "System setup"
69 79
70 choice 80 choice
71 prompt "Subarchitecture" !! 81 prompt "Alpha system type"
72 default OR1K_1200 !! 82 default ALPHA_GENERIC
>> 83 help
>> 84 This is the system type of your hardware. A "generic" kernel will
>> 85 run on any supported Alpha system. However, if you configure a
>> 86 kernel for your specific system, it will be faster and smaller.
>> 87
>> 88 To find out what type of Alpha system you have, you may want to
>> 89 check out the Linux/Alpha FAQ, accessible on the WWW from
>> 90 <http://www.alphalinux.org/>. In summary:
>> 91
>> 92 Alcor/Alpha-XLT AS 600, AS 500, XL-300, XL-366
>> 93 DP264 DP264 / DS20 / ES40 / DS10 / DS10L
>> 94 LX164 AlphaPC164-LX
>> 95 Miata Personal Workstation 433/500/600 a/au
>> 96 Marvel AlphaServer ES47 / ES80 / GS1280
>> 97 Mikasa AS 1000
>> 98 Noritake AS 1000A, AS 600A, AS 800
>> 99 PC164 AlphaPC164
>> 100 Rawhide AS 1200, AS 4000, AS 4100
>> 101 Ruffian RPX164-2, AlphaPC164-UX, AlphaPC164-BX
>> 102 SX164 AlphaPC164-SX
>> 103 Sable AS 2000, AS 2100
>> 104 Shark DS 20L
>> 105 Takara Takara (OEM)
>> 106 Titan AlphaServer ES45 / DS25 / DS15
>> 107 Wildfire AlphaServer GS 40/80/160/320
73 108
74 config OR1K_1200 !! 109 If you don't know what to do, choose "generic".
75 bool "OR1200" !! 110
>> 111 config ALPHA_GENERIC
>> 112 bool "Generic"
>> 113 depends on TTY
>> 114 select HAVE_EISA
76 help 115 help
77 Generic OpenRISC 1200 architecture !! 116 A generic kernel will run on all supported Alpha hardware.
78 117
79 endchoice !! 118 config ALPHA_ALCOR
>> 119 bool "Alcor/Alpha-XLT"
>> 120 select HAVE_EISA
>> 121 help
>> 122 For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
>> 123 slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
>> 124 Address, CIA) - a 383 pin plastic PGA). It provides a DRAM
>> 125 controller (256-bit memory bus) and a PCI interface. It also does
>> 126 all the work required to support an external Bcache and to maintain
>> 127 memory coherence when a PCI device DMAs into (or out of) memory.
80 128
81 config DCACHE_WRITETHROUGH !! 129 config ALPHA_DP264
82 bool "Have write through data caches" !! 130 bool "DP264"
83 default n <<
84 help 131 help
85 Select this if your implementation f !! 132 Various 21264 systems with the tsunami core logic chipset.
86 Selecting 'N' here will allow the ke !! 133 API Networks: 264DP, UP2000(+), CS20;
87 caches at relevant times. Most OpenR !! 134 Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
88 through data caches. <<
89 135
90 If unsure say N here !! 136 config ALPHA_EIGER
>> 137 bool "Eiger"
>> 138 help
>> 139 Apparently an obscure OEM single-board computer based on the
>> 140 Typhoon/Tsunami chipset family. Information on it is scanty.
91 141
92 config OPENRISC_BUILTIN_DTB !! 142 config ALPHA_LX164
93 string "Builtin DTB" !! 143 bool "LX164"
94 default "" !! 144 help
>> 145 A technical overview of this board is available at
>> 146 <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
95 147
96 menu "Class II Instructions" !! 148 config ALPHA_MARVEL
>> 149 bool "Marvel"
>> 150 help
>> 151 AlphaServer ES47 / ES80 / GS1280 based on EV7.
97 152
98 config OPENRISC_HAVE_INST_FF1 !! 153 config ALPHA_MIATA
99 bool "Have instruction l.ff1" !! 154 bool "Miata"
100 default y !! 155 select HAVE_EISA
101 help 156 help
102 Select this if your implementation h !! 157 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
>> 158 or 600au).
103 159
104 config OPENRISC_HAVE_INST_FL1 !! 160 config ALPHA_MIKASA
105 bool "Have instruction l.fl1" !! 161 bool "Mikasa"
106 default y <<
107 help 162 help
108 Select this if your implementation h !! 163 AlphaServer 1000-based Alpha systems.
109 164
110 config OPENRISC_HAVE_INST_MUL !! 165 config ALPHA_NAUTILUS
111 bool "Have instruction l.mul for hardw !! 166 bool "Nautilus"
112 default y <<
113 help 167 help
114 Select this if your implementation h !! 168 Alpha systems based on the AMD 751 & ALI 1543C chipsets.
115 169
116 config OPENRISC_HAVE_INST_DIV !! 170 config ALPHA_NORITAKE
117 bool "Have instruction l.div for hardw !! 171 bool "Noritake"
118 default y !! 172 select HAVE_EISA
119 help 173 help
120 Select this if your implementation h !! 174 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
>> 175 systems.
121 176
122 config OPENRISC_HAVE_INST_CMOV !! 177 config ALPHA_PC164
123 bool "Have instruction l.cmov for cond !! 178 bool "PC164"
124 default n !! 179
>> 180 config ALPHA_RAWHIDE
>> 181 bool "Rawhide"
>> 182 select HAVE_EISA
125 help 183 help
126 This config enables gcc to generate !! 184 AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
127 the kernel which in general will imp !! 185 See HOWTO at
128 binary size. !! 186 <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
129 187
130 Select this if your implementation h !! 188 config ALPHA_RUFFIAN
131 l.cmov conistional move instruction. !! 189 bool "Ruffian"
>> 190 help
>> 191 Samsung APC164UX. There is a page on known problems and workarounds
>> 192 at <http://www.alphalinux.org/faq/FAQ-11.html>.
132 193
133 Say N if you are unsure. !! 194 config ALPHA_RX164
>> 195 bool "RX164"
134 196
135 config OPENRISC_HAVE_INST_ROR !! 197 config ALPHA_SX164
136 bool "Have instruction l.ror for rotat !! 198 bool "SX164"
137 default n !! 199
>> 200 config ALPHA_SABLE
>> 201 bool "Sable"
>> 202 select HAVE_EISA
138 help 203 help
139 This config enables gcc to generate !! 204 Digital AlphaServer 2000 and 2100-based systems.
140 the kernel which in general will imp <<
141 binary size. <<
142 205
143 Select this if your implementation h !! 206 config ALPHA_SHARK
144 l.ror rotate right instruction. !! 207 bool "Shark"
145 208
146 Say N if you are unsure. !! 209 config ALPHA_TAKARA
>> 210 bool "Takara"
>> 211 help
>> 212 Alpha 11164-based OEM single-board computer.
147 213
148 config OPENRISC_HAVE_INST_RORI !! 214 config ALPHA_TITAN
149 bool "Have instruction l.rori for rota !! 215 bool "Titan"
150 default n <<
151 help 216 help
152 This config enables gcc to generate !! 217 AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
153 the kernel which in general will imp <<
154 binary size. <<
155 218
156 Select this if your implementation h !! 219 config ALPHA_WILDFIRE
157 l.rori rotate right with immediate i !! 220 bool "Wildfire"
>> 221 help
>> 222 AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
158 223
159 Say N if you are unsure. !! 224 endchoice
160 225
161 config OPENRISC_HAVE_INST_SEXT !! 226 # clear all implied options (don't want default values for those):
162 bool "Have instructions l.ext* for sig !! 227 # Most of these machines have ISA slots; not exactly sure which don't,
163 default n !! 228 # and this doesn't activate hordes of code, so do it always.
>> 229 config ISA
>> 230 bool
>> 231 default y
164 help 232 help
165 This config enables gcc to generate !! 233 Find out whether you have ISA slots on your motherboard. ISA is the
166 the kernel which in general will imp !! 234 name of a bus system, i.e. the way the CPU talks to the other stuff
167 binary size. !! 235 inside your box. Other bus systems are PCI, EISA, MicroChannel
>> 236 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
>> 237 newer boards don't support it. If you have ISA, say Y, otherwise N.
168 238
169 Select this if your implementation h !! 239 config ISA_DMA_API
170 l.exths, l.extbs, l.exthz and l.extb !! 240 bool
>> 241 default y
171 242
172 Say N if you are unsure. !! 243 config ALPHA_CIA
>> 244 bool
>> 245 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_NORITAKE || ALPHA_MIKASA || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_ALCOR
>> 246 default y
173 247
174 endmenu !! 248 config ALPHA_EV56
>> 249 bool
>> 250 default y if ALPHA_ALCOR || ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_NORITAKE || ALPHA_MIKASA || ALPHA_RAWHIDE || ALPHA_SABLE
>> 251
>> 252 config ALPHA_T2
>> 253 bool
>> 254 depends on ALPHA_SABLE
>> 255 default y
175 256
176 config NR_CPUS !! 257 config ALPHA_PYXIS
177 int "Maximum number of CPUs (2-32)" !! 258 bool
178 range 2 32 !! 259 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
179 depends on SMP !! 260 default y
180 default "2" <<
181 261
182 config SMP !! 262 config ALPHA_EV6
183 bool "Symmetric Multi-Processing suppo !! 263 bool
184 help !! 264 depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
185 This enables support for systems wit !! 265 default y
186 a system with only one CPU, say N. I <<
187 than one CPU, say Y. <<
188 266
189 If you don't know what to do here, s !! 267 config ALPHA_TSUNAMI
>> 268 bool
>> 269 depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
>> 270 default y
190 271
191 config FPU !! 272 config ALPHA_EV67
192 bool "FPU support" !! 273 bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
>> 274 default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
>> 275 help
>> 276 Is this a machine based on the EV67 core? If in doubt, select N here
>> 277 and the machine will be treated as an EV6.
>> 278
>> 279 config ALPHA_MCPCIA
>> 280 bool
>> 281 depends on ALPHA_RAWHIDE
193 default y 282 default y
194 help <<
195 Say N here if you want to disable al <<
196 in the kernel and reduce binary size <<
197 283
198 If you don't know what to do here, s !! 284 config ALPHA_POLARIS
>> 285 bool
>> 286 depends on ALPHA_RX164
>> 287 default y
199 288
200 source "kernel/Kconfig.hz" !! 289 config ALPHA_IRONGATE
>> 290 bool
>> 291 depends on ALPHA_NAUTILUS
>> 292 default y
>> 293
>> 294 config GENERIC_HWEIGHT
>> 295 bool
>> 296 default y if !ALPHA_EV67
201 297
202 config OPENRISC_NO_SPR_SR_DSX !! 298 config ALPHA_BROKEN_IRQ_MASK
203 bool "use SPR_SR_DSX software emulatio !! 299 bool
>> 300 depends on ALPHA_GENERIC || ALPHA_PC164
204 default y 301 default y
205 help <<
206 SPR_SR_DSX bit is status register bi <<
207 the last exception has happened in d <<
208 302
209 OpenRISC architecture makes it optio !! 303 config VGA_HOSE
210 in hardware and the OR1200 does not !! 304 bool
>> 305 depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
>> 306 default y
>> 307 help
>> 308 Support VGA on an arbitrary hose; needed for several platforms
>> 309 which always have multiple hoses, and whose consoles support it.
211 310
212 Say N here if you know that your Ope <<
213 SPR_SR_DSX bit implemented. Say Y if <<
214 311
215 config OPENRISC_HAVE_SHADOW_GPRS !! 312 config ALPHA_QEMU
216 bool "Support for shadow gpr files" if !! 313 bool "Run under QEMU emulation"
217 default y if SMP !! 314 depends on !ALPHA_GENERIC
218 help 315 help
219 Say Y here if your OpenRISC processo !! 316 Assume the presence of special features supported by QEMU PALcode
220 register files. They will in such ca !! 317 that reduce the overhead of system emulation.
221 scratch reg storage on exception ent !! 318
>> 319 Generic kernels will auto-detect QEMU. But when building a
>> 320 system-specific kernel, the assumption is that we want to
>> 321 eliminate as many runtime tests as possible.
>> 322
>> 323 If unsure, say N.
222 324
223 On SMP systems, this feature is mand <<
224 On a unicore system it's safe to say <<
225 325
226 config CMDLINE !! 326 config ALPHA_SRM
227 string "Default kernel command string" !! 327 bool "Use SRM as bootloader" if ALPHA_PC164 || ALPHA_TAKARA || ALPHA_ALCOR || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_NAUTILUS
228 default "" !! 328 depends on TTY
>> 329 default y if ALPHA_MIKASA || ALPHA_SABLE || ALPHA_NORITAKE || ALPHA_DP264 || ALPHA_RAWHIDE || ALPHA_EIGER || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
229 help 330 help
230 On some architectures there is curre !! 331 There are two different types of booting firmware on Alphas: SRM,
231 to pass arguments to the kernel. For !! 332 which is command line driven, and ARC, which uses menus and arrow
232 supply some command-line options at !! 333 keys. Details about the Linux/Alpha booting process are contained in
233 here. !! 334 the Linux/Alpha FAQ, accessible on the WWW from
>> 335 <http://www.alphalinux.org/>.
234 336
235 menu "Debugging options" !! 337 The usual way to load Linux on an Alpha machine is to use MILO
>> 338 (a bootloader that lets you pass command line parameters to the
>> 339 kernel just like lilo does for the x86 architecture) which can be
>> 340 loaded either from ARC or can be installed directly as a permanent
>> 341 firmware replacement from floppy (which requires changing a certain
>> 342 jumper on the motherboard). If you want to do either of these, say N
>> 343 here. If MILO doesn't work on your system (true for Jensen
>> 344 motherboards), you can bypass it altogether and boot Linux directly
>> 345 from an SRM console; say Y here in order to do that. Note that you
>> 346 won't be able to boot from an IDE disk using SRM.
236 347
237 config JUMP_UPON_UNHANDLED_EXCEPTION !! 348 If unsure, say N.
238 bool "Try to die gracefully" !! 349
239 default y !! 350 config ARCH_MAY_HAVE_PC_FDC
>> 351 def_bool y
>> 352
>> 353 config SMP
>> 354 bool "Symmetric multi-processing support"
>> 355 depends on ALPHA_SABLE || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
240 help 356 help
241 Now this puts kernel into infinite l !! 357 This enables support for systems with more than one CPU. If you have
242 your kernel crashes this doesn't hav !! 358 a system with only one CPU, say N. If you have a system with more
>> 359 than one CPU, say Y.
243 360
244 Say Y if you are unsure. !! 361 If you say N here, the kernel will run on uni- and multiprocessor
>> 362 machines, but will use only one CPU of a multiprocessor machine. If
>> 363 you say Y here, the kernel will run on many, but not all,
>> 364 uniprocessor machines. On a uniprocessor machine, the kernel
>> 365 will run faster if you say N here.
245 366
246 config OPENRISC_ESR_EXCEPTION_BUG_CHECK !! 367 See also the SMP-HOWTO available at
247 bool "Check for possible ESR exception !! 368 <https://www.tldp.org/docs.html#howto>.
248 default n !! 369
>> 370 If you don't know what to do here, say N.
>> 371
>> 372 config NR_CPUS
>> 373 int "Maximum number of CPUs (2-32)"
>> 374 range 2 32
>> 375 depends on SMP
>> 376 default "32" if ALPHA_GENERIC || ALPHA_MARVEL
>> 377 default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
>> 378 help
>> 379 MARVEL support can handle a maximum of 32 CPUs, all the others
>> 380 with working support have a maximum of 4 CPUs.
>> 381
>> 382 config ARCH_SPARSEMEM_ENABLE
>> 383 bool "Sparse Memory Support"
249 help 384 help
250 This option enables some checks that !! 385 Say Y to support efficient handling of discontiguous physical memory,
251 in kernel. !! 386 for systems that have huge holes in the physical address space.
>> 387
>> 388 config ALPHA_WTINT
>> 389 bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
>> 390 default y if ALPHA_QEMU
>> 391 default n if ALPHA_EV56
>> 392 default n if !ALPHA_SRM && !ALPHA_GENERIC
>> 393 default y if SMP
>> 394 help
>> 395 The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
>> 396 to sleep until the next interrupt. This may reduce the power
>> 397 consumed, and the heat produced by the computer. However, it has
>> 398 the side effect of making the cycle counter unreliable as a timing
>> 399 device across the sleep.
>> 400
>> 401 For emulation under QEMU, definitely say Y here, as we have other
>> 402 mechanisms for measuring time than the cycle counter.
>> 403
>> 404 For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
>> 405 MILO, sleep mode is not supported so you might as well say N here.
>> 406
>> 407 For SMP systems we cannot use the cycle counter for timing anyway,
>> 408 so you might as well say Y here.
>> 409
>> 410 If unsure, say N.
>> 411
>> 412 # LARGE_VMALLOC is racy, if you *really* need it then fix it first
>> 413 config ALPHA_LARGE_VMALLOC
>> 414 bool
>> 415 help
>> 416 Process creation and other aspects of virtual memory management can
>> 417 be streamlined if we restrict the kernel to one PGD for all vmalloc
>> 418 allocations. This equates to about 8GB.
>> 419
>> 420 Under normal circumstances, this is so far and above what is needed
>> 421 as to be laughable. However, there are certain applications (such
>> 422 as benchmark-grade in-kernel web serving) that can make use of as
>> 423 much vmalloc space as is available.
>> 424
>> 425 Say N unless you know you need gobs and gobs of vmalloc space.
>> 426
>> 427 config VERBOSE_MCHECK
>> 428 bool "Verbose Machine Checks"
>> 429
>> 430 config VERBOSE_MCHECK_ON
>> 431 int "Verbose Printing Mode (0=off, 1=on, 2=all)"
>> 432 depends on VERBOSE_MCHECK
>> 433 default 1
>> 434 help
>> 435 This option allows the default printing mode to be set, and then
>> 436 possibly overridden by a boot command argument.
>> 437
>> 438 For example, if one wanted the option of printing verbose
>> 439 machine checks, but wanted the default to be as if verbose
>> 440 machine check printing was turned off, then one would choose
>> 441 the printing mode to be 0. Then, upon reboot, one could add
>> 442 the boot command line "verbose_mcheck=1" to get the normal
>> 443 verbose machine check printing, or "verbose_mcheck=2" to get
>> 444 the maximum information available.
252 445
253 Say N if you are unsure. !! 446 Take the default (1) unless you want more control or more info.
254 447
255 endmenu !! 448 choice
>> 449 prompt "Timer interrupt frequency (HZ)?"
>> 450 default HZ_128 if ALPHA_QEMU
>> 451 default HZ_1200 if ALPHA_RAWHIDE
>> 452 default HZ_1024
>> 453 help
>> 454 The frequency at which timer interrupts occur. A high frequency
>> 455 minimizes latency, whereas a low frequency minimizes overhead of
>> 456 process accounting. The later effect is especially significant
>> 457 when being run under QEMU.
>> 458
>> 459 Note that some Alpha hardware cannot change the interrupt frequency
>> 460 of the timer. If unsure, say 1024 (or 1200 for Rawhide).
>> 461
>> 462 config HZ_32
>> 463 bool "32 Hz"
>> 464 config HZ_64
>> 465 bool "64 Hz"
>> 466 config HZ_128
>> 467 bool "128 Hz"
>> 468 config HZ_256
>> 469 bool "256 Hz"
>> 470 config HZ_1024
>> 471 bool "1024 Hz"
>> 472 config HZ_1200
>> 473 bool "1200 Hz"
>> 474 endchoice
>> 475
>> 476 config HZ
>> 477 int
>> 478 default 32 if HZ_32
>> 479 default 64 if HZ_64
>> 480 default 128 if HZ_128
>> 481 default 256 if HZ_256
>> 482 default 1200 if HZ_1200
>> 483 default 1024
>> 484
>> 485 config SRM_ENV
>> 486 tristate "SRM environment through procfs"
>> 487 depends on PROC_FS
>> 488 help
>> 489 If you enable this option, a subdirectory inside /proc called
>> 490 /proc/srm_environment will give you access to the all important
>> 491 SRM environment variables (those which have a name) and also
>> 492 to all others (by their internal number).
>> 493
>> 494 SRM is something like a BIOS for Alpha machines. There are some
>> 495 other such BIOSes, like AlphaBIOS, which this driver cannot
>> 496 support (hey, that's not SRM!).
>> 497
>> 498 Despite the fact that this driver doesn't work on all Alphas (but
>> 499 only on those which have SRM as their firmware), it's save to
>> 500 build it even if your particular machine doesn't know about SRM
>> 501 (or if you intend to compile a generic kernel). It will simply
>> 502 not create those subdirectory in /proc (and give you some warning,
>> 503 of course).
>> 504
>> 505 This driver is also available as a module and will be called
>> 506 srm_env then.
256 507
257 endmenu 508 endmenu
>> 509
>> 510 # DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
>> 511 # but we also need it if VGA_HOSE is set
>> 512 config DUMMY_CONSOLE
>> 513 bool
>> 514 depends on VGA_HOSE
>> 515 default y
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