1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 # Hexagon configuration !! 2 config ALPHA
3 comment "Linux Kernel Configuration for Hexago !! 3 bool
4 !! 4 default y
5 config HEXAGON !! 5 select ARCH_32BIT_USTAT_F_TINODE
6 def_bool y !! 6 select ARCH_HAS_CURRENT_STACK_POINTER
7 select ARCH_32BIT_OFF_T !! 7 select ARCH_HAS_DMA_OPS if PCI
8 select ARCH_HAS_SYNC_DMA_FOR_DEVICE !! 8 select ARCH_MIGHT_HAVE_PC_PARPORT
>> 9 select ARCH_MIGHT_HAVE_PC_SERIO
9 select ARCH_NO_PREEMPT 10 select ARCH_NO_PREEMPT
10 select ARCH_WANT_FRAME_POINTERS !! 11 select ARCH_NO_SG_CHAIN
11 select DMA_GLOBAL_POOL !! 12 select ARCH_USE_CMPXCHG_LOCKREF
12 select HAVE_PAGE_SIZE_4KB !! 13 select FORCE_PCI
13 select HAVE_PAGE_SIZE_16KB !! 14 select PCI_DOMAINS if PCI
14 select HAVE_PAGE_SIZE_64KB !! 15 select PCI_SYSCALL if PCI
15 select HAVE_PAGE_SIZE_256KB !! 16 select HAVE_ASM_MODVERSIONS
16 select FRAME_POINTER !! 17 select HAVE_PAGE_SIZE_8KB
17 # Other pending projects/to-do items. !! 18 select HAVE_PCSPKR_PLATFORM
18 # select HAVE_REGS_AND_STACK_ACCESS_AP <<
19 # select HAVE_HW_BREAKPOINT if PERF_EV <<
20 # select ARCH_HAS_CPU_IDLE_WAIT <<
21 # select GPIOLIB <<
22 # select HAVE_CLK <<
23 # select GENERIC_PENDING_IRQ if SMP <<
24 select GENERIC_ATOMIC64 <<
25 select HAVE_PERF_EVENTS 19 select HAVE_PERF_EVENTS
26 # GENERIC_ALLOCATOR is used by dma_all !! 20 select NEED_DMA_MAP_STATE
27 select GENERIC_ALLOCATOR !! 21 select NEED_SG_DMA_LENGTH
28 select GENERIC_IRQ_PROBE 22 select GENERIC_IRQ_PROBE
>> 23 select GENERIC_PCI_IOMAP
>> 24 select AUTO_IRQ_AFFINITY if SMP
29 select GENERIC_IRQ_SHOW 25 select GENERIC_IRQ_SHOW
30 select HAVE_ARCH_KGDB !! 26 select ARCH_WANT_IPC_PARSE_VERSION
31 select HAVE_ARCH_TRACEHOOK !! 27 select ARCH_HAVE_NMI_SAFE_CMPXCHG
32 select NEED_SG_DMA_LENGTH !! 28 select AUDIT_ARCH
33 select NO_IOPORT_MAP !! 29 select GENERIC_CPU_VULNERABILITIES
34 select GENERIC_IOMAP <<
35 select GENERIC_IOREMAP <<
36 select GENERIC_SMP_IDLE_THREAD 30 select GENERIC_SMP_IDLE_THREAD
37 select STACKTRACE_SUPPORT !! 31 select HAS_IOPORT
38 select GENERIC_CLOCKEVENTS_BROADCAST !! 32 select HAVE_ARCH_AUDITSYSCALL
>> 33 select HAVE_MOD_ARCH_SPECIFIC
39 select LOCK_MM_AND_FIND_VMA 34 select LOCK_MM_AND_FIND_VMA
40 select MODULES_USE_ELF_RELA 35 select MODULES_USE_ELF_RELA
41 select GENERIC_CPU_DEVICES !! 36 select ODD_RT_SIGACTION
42 select ARCH_WANT_LD_ORPHAN_WARN !! 37 select OLD_SIGSUSPEND
43 select TRACE_IRQFLAGS_SUPPORT !! 38 select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67
>> 39 select MMU_GATHER_NO_RANGE
>> 40 select SPARSEMEM_EXTREME if SPARSEMEM
>> 41 select ZONE_DMA
44 help 42 help
45 Qualcomm Hexagon is a processor arch !! 43 The Alpha is a 64-bit general-purpose processor designed and
46 performance and low power across a w !! 44 marketed by the Digital Equipment Corporation of blessed memory,
>> 45 now Hewlett-Packard. The Alpha Linux project has a home page at
>> 46 <http://www.alphalinux.org/>.
47 47
48 config HEXAGON_PHYS_OFFSET !! 48 config 64BIT
49 def_bool y 49 def_bool y
50 help <<
51 Platforms that don't load the kernel <<
52 50
53 config LOCKDEP_SUPPORT !! 51 config MMU
54 def_bool y !! 52 bool
>> 53 default y
55 54
56 config EARLY_PRINTK !! 55 config ARCH_HAS_ILOG2_U32
57 def_bool y !! 56 bool
>> 57 default n
58 58
59 config MMU !! 59 config ARCH_HAS_ILOG2_U64
60 def_bool y !! 60 bool
>> 61 default n
61 62
62 config GENERIC_CSUM !! 63 config GENERIC_CALIBRATE_DELAY
63 def_bool y !! 64 bool
>> 65 default y
64 66
65 config GENERIC_HWEIGHT !! 67 config GENERIC_ISA_DMA
66 def_bool y !! 68 bool
>> 69 default y
67 70
68 config STACKTRACE_SUPPORT !! 71 config PGTABLE_LEVELS
69 def_bool y !! 72 int
70 select STACKTRACE !! 73 default 3
71 74
72 config GENERIC_BUG !! 75 config AUDIT_ARCH
73 def_bool y !! 76 bool
74 depends on BUG <<
75 77
76 menu "Machine selection" !! 78 menu "System setup"
77 79
78 choice 80 choice
79 prompt "System type" !! 81 prompt "Alpha system type"
80 default HEXAGON_COMET !! 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
>> 108
>> 109 If you don't know what to do, choose "generic".
>> 110
>> 111 config ALPHA_GENERIC
>> 112 bool "Generic"
>> 113 depends on TTY
>> 114 select HAVE_EISA
>> 115 help
>> 116 A generic kernel will run on all supported Alpha hardware.
>> 117
>> 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.
>> 128
>> 129 config ALPHA_DP264
>> 130 bool "DP264"
>> 131 help
>> 132 Various 21264 systems with the tsunami core logic chipset.
>> 133 API Networks: 264DP, UP2000(+), CS20;
>> 134 Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
>> 135
>> 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.
>> 141
>> 142 config ALPHA_LX164
>> 143 bool "LX164"
>> 144 help
>> 145 A technical overview of this board is available at
>> 146 <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
>> 147
>> 148 config ALPHA_MARVEL
>> 149 bool "Marvel"
>> 150 help
>> 151 AlphaServer ES47 / ES80 / GS1280 based on EV7.
>> 152
>> 153 config ALPHA_MIATA
>> 154 bool "Miata"
>> 155 select HAVE_EISA
>> 156 help
>> 157 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
>> 158 or 600au).
>> 159
>> 160 config ALPHA_MIKASA
>> 161 bool "Mikasa"
>> 162 help
>> 163 AlphaServer 1000-based Alpha systems.
>> 164
>> 165 config ALPHA_NAUTILUS
>> 166 bool "Nautilus"
>> 167 help
>> 168 Alpha systems based on the AMD 751 & ALI 1543C chipsets.
>> 169
>> 170 config ALPHA_NORITAKE
>> 171 bool "Noritake"
>> 172 select HAVE_EISA
>> 173 help
>> 174 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
>> 175 systems.
>> 176
>> 177 config ALPHA_PC164
>> 178 bool "PC164"
>> 179
>> 180 config ALPHA_RAWHIDE
>> 181 bool "Rawhide"
>> 182 select HAVE_EISA
>> 183 help
>> 184 AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
>> 185 See HOWTO at
>> 186 <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
>> 187
>> 188 config ALPHA_RUFFIAN
>> 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>.
>> 193
>> 194 config ALPHA_RX164
>> 195 bool "RX164"
>> 196
>> 197 config ALPHA_SX164
>> 198 bool "SX164"
81 199
82 config HEXAGON_COMET !! 200 config ALPHA_SABLE
83 bool "Comet Board" !! 201 bool "Sable"
>> 202 select HAVE_EISA
84 help 203 help
85 Support for the Comet platform. !! 204 Digital AlphaServer 2000 and 2100-based systems.
>> 205
>> 206 config ALPHA_SHARK
>> 207 bool "Shark"
>> 208
>> 209 config ALPHA_TAKARA
>> 210 bool "Takara"
>> 211 help
>> 212 Alpha 11164-based OEM single-board computer.
>> 213
>> 214 config ALPHA_TITAN
>> 215 bool "Titan"
>> 216 help
>> 217 AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
>> 218
>> 219 config ALPHA_WILDFIRE
>> 220 bool "Wildfire"
>> 221 help
>> 222 AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
86 223
87 endchoice 224 endchoice
88 225
89 config HEXAGON_ARCH_VERSION !! 226 # clear all implied options (don't want default values for those):
90 int "Architecture version" !! 227 # Most of these machines have ISA slots; not exactly sure which don't,
91 default 2 !! 228 # and this doesn't activate hordes of code, so do it always.
92 !! 229 config ISA
93 config CMDLINE !! 230 bool
94 string "Default kernel command string" !! 231 default y
95 default "" !! 232 help
96 help !! 233 Find out whether you have ISA slots on your motherboard. ISA is the
97 On some platforms, there is currentl !! 234 name of a bus system, i.e. the way the CPU talks to the other stuff
98 to pass arguments to the kernel. For !! 235 inside your box. Other bus systems are PCI, EISA, MicroChannel
99 command-line options at build time b !! 236 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
100 minimum, you should specify the memo !! 237 newer boards don't support it. If you have ISA, say Y, otherwise N.
101 (e.g., mem=64M root=/dev/nfs). !! 238
>> 239 config ISA_DMA_API
>> 240 bool
>> 241 default y
>> 242
>> 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
>> 247
>> 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
>> 256
>> 257 config ALPHA_PYXIS
>> 258 bool
>> 259 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
>> 260 default y
>> 261
>> 262 config ALPHA_EV6
>> 263 bool
>> 264 depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
>> 265 default y
>> 266
>> 267 config ALPHA_TSUNAMI
>> 268 bool
>> 269 depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
>> 270 default y
>> 271
>> 272 config ALPHA_EV67
>> 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
>> 282 default y
>> 283
>> 284 config ALPHA_POLARIS
>> 285 bool
>> 286 depends on ALPHA_RX164
>> 287 default y
>> 288
>> 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
>> 297
>> 298 config ALPHA_BROKEN_IRQ_MASK
>> 299 bool
>> 300 depends on ALPHA_GENERIC || ALPHA_PC164
>> 301 default y
>> 302
>> 303 config VGA_HOSE
>> 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.
>> 310
>> 311
>> 312 config ALPHA_QEMU
>> 313 bool "Run under QEMU emulation"
>> 314 depends on !ALPHA_GENERIC
>> 315 help
>> 316 Assume the presence of special features supported by QEMU PALcode
>> 317 that reduce the overhead of system emulation.
>> 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.
>> 324
>> 325
>> 326 config ALPHA_SRM
>> 327 bool "Use SRM as bootloader" if ALPHA_PC164 || ALPHA_TAKARA || ALPHA_ALCOR || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_NAUTILUS
>> 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
>> 330 help
>> 331 There are two different types of booting firmware on Alphas: SRM,
>> 332 which is command line driven, and ARC, which uses menus and arrow
>> 333 keys. Details about the Linux/Alpha booting process are contained in
>> 334 the Linux/Alpha FAQ, accessible on the WWW from
>> 335 <http://www.alphalinux.org/>.
>> 336
>> 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.
>> 347
>> 348 If unsure, say N.
>> 349
>> 350 config ARCH_MAY_HAVE_PC_FDC
>> 351 def_bool y
102 352
103 config SMP 353 config SMP
104 bool "Multi-Processing support" !! 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
105 help 356 help
106 Enables SMP support in the kernel. !! 357 This enables support for systems with more than one CPU. If you have
>> 358 a system with only one CPU, say N. If you have a system with more
>> 359 than one CPU, say Y.
>> 360
>> 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.
>> 366
>> 367 See also the SMP-HOWTO available at
>> 368 <https://www.tldp.org/docs.html#howto>.
>> 369
>> 370 If you don't know what to do here, say N.
107 371
108 config NR_CPUS 372 config NR_CPUS
109 int "Maximum number of CPUs" if SMP !! 373 int "Maximum number of CPUs (2-32)"
110 range 2 6 if SMP !! 374 range 2 32
111 default "1" if !SMP !! 375 depends on SMP
112 default "6" if SMP !! 376 default "32" if ALPHA_GENERIC || ALPHA_MARVEL
113 help !! 377 default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
114 This allows you to specify the maxim !! 378 help
115 kernel will support. The maximum su !! 379 MARVEL support can handle a maximum of 32 CPUs, all the others
116 minimum value which makes sense is 2 !! 380 with working support have a maximum of 4 CPUs.
117 381
118 This is purely to save memory - each !! 382 config ARCH_SPARSEMEM_ENABLE
119 approximately eight kilobytes to the !! 383 bool "Sparse Memory Support"
>> 384 help
>> 385 Say Y to support efficient handling of discontiguous physical memory,
>> 386 for systems that have huge holes in the physical address space.
120 387
121 source "kernel/Kconfig.hz" !! 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.
>> 445
>> 446 Take the default (1) unless you want more control or more info.
>> 447
>> 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.
122 507
123 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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