1 # SPDX-License-Identifier: GPL-2.0 1 # SPDX-License-Identifier: GPL-2.0
2 config ALPHA 2 config ALPHA
3 bool 3 bool
4 default y 4 default y
5 select ARCH_32BIT_USTAT_F_TINODE 5 select ARCH_32BIT_USTAT_F_TINODE
6 select ARCH_HAS_CURRENT_STACK_POINTER 6 select ARCH_HAS_CURRENT_STACK_POINTER
7 select ARCH_HAS_DMA_OPS if PCI 7 select ARCH_HAS_DMA_OPS if PCI
8 select ARCH_MIGHT_HAVE_PC_PARPORT 8 select ARCH_MIGHT_HAVE_PC_PARPORT
9 select ARCH_MIGHT_HAVE_PC_SERIO 9 select ARCH_MIGHT_HAVE_PC_SERIO
10 select ARCH_NO_PREEMPT 10 select ARCH_NO_PREEMPT
11 select ARCH_NO_SG_CHAIN 11 select ARCH_NO_SG_CHAIN
12 select ARCH_USE_CMPXCHG_LOCKREF 12 select ARCH_USE_CMPXCHG_LOCKREF
13 select FORCE_PCI 13 select FORCE_PCI
14 select PCI_DOMAINS if PCI 14 select PCI_DOMAINS if PCI
15 select PCI_SYSCALL if PCI 15 select PCI_SYSCALL if PCI
16 select HAVE_ASM_MODVERSIONS 16 select HAVE_ASM_MODVERSIONS
17 select HAVE_PAGE_SIZE_8KB 17 select HAVE_PAGE_SIZE_8KB
18 select HAVE_PCSPKR_PLATFORM 18 select HAVE_PCSPKR_PLATFORM
19 select HAVE_PERF_EVENTS 19 select HAVE_PERF_EVENTS
20 select NEED_DMA_MAP_STATE 20 select NEED_DMA_MAP_STATE
21 select NEED_SG_DMA_LENGTH 21 select NEED_SG_DMA_LENGTH
22 select GENERIC_IRQ_PROBE 22 select GENERIC_IRQ_PROBE
23 select GENERIC_PCI_IOMAP 23 select GENERIC_PCI_IOMAP
24 select AUTO_IRQ_AFFINITY if SMP 24 select AUTO_IRQ_AFFINITY if SMP
25 select GENERIC_IRQ_SHOW 25 select GENERIC_IRQ_SHOW
26 select ARCH_WANT_IPC_PARSE_VERSION 26 select ARCH_WANT_IPC_PARSE_VERSION
27 select ARCH_HAVE_NMI_SAFE_CMPXCHG 27 select ARCH_HAVE_NMI_SAFE_CMPXCHG
28 select AUDIT_ARCH 28 select AUDIT_ARCH
29 select GENERIC_CPU_VULNERABILITIES 29 select GENERIC_CPU_VULNERABILITIES
30 select GENERIC_SMP_IDLE_THREAD 30 select GENERIC_SMP_IDLE_THREAD
31 select HAS_IOPORT 31 select HAS_IOPORT
32 select HAVE_ARCH_AUDITSYSCALL 32 select HAVE_ARCH_AUDITSYSCALL
33 select HAVE_MOD_ARCH_SPECIFIC 33 select HAVE_MOD_ARCH_SPECIFIC
34 select LOCK_MM_AND_FIND_VMA 34 select LOCK_MM_AND_FIND_VMA
35 select MODULES_USE_ELF_RELA 35 select MODULES_USE_ELF_RELA
36 select ODD_RT_SIGACTION 36 select ODD_RT_SIGACTION
37 select OLD_SIGSUSPEND 37 select OLD_SIGSUSPEND
38 select CPU_NO_EFFICIENT_FFS if !ALPHA_ 38 select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67
39 select MMU_GATHER_NO_RANGE 39 select MMU_GATHER_NO_RANGE
40 select SPARSEMEM_EXTREME if SPARSEMEM 40 select SPARSEMEM_EXTREME if SPARSEMEM
41 select ZONE_DMA 41 select ZONE_DMA
42 help 42 help
43 The Alpha is a 64-bit general-purpos 43 The Alpha is a 64-bit general-purpose processor designed and
44 marketed by the Digital Equipment Co 44 marketed by the Digital Equipment Corporation of blessed memory,
45 now Hewlett-Packard. The Alpha Linu 45 now Hewlett-Packard. The Alpha Linux project has a home page at
46 <http://www.alphalinux.org/>. 46 <http://www.alphalinux.org/>.
47 47
48 config 64BIT 48 config 64BIT
49 def_bool y 49 def_bool y
50 50
51 config MMU 51 config MMU
52 bool 52 bool
53 default y 53 default y
54 54
55 config ARCH_HAS_ILOG2_U32 55 config ARCH_HAS_ILOG2_U32
56 bool 56 bool
57 default n 57 default n
58 58
59 config ARCH_HAS_ILOG2_U64 59 config ARCH_HAS_ILOG2_U64
60 bool 60 bool
61 default n 61 default n
62 62
63 config GENERIC_CALIBRATE_DELAY 63 config GENERIC_CALIBRATE_DELAY
64 bool 64 bool
65 default y 65 default y
66 66
67 config GENERIC_ISA_DMA 67 config GENERIC_ISA_DMA
68 bool 68 bool
69 default y 69 default y
70 70
71 config PGTABLE_LEVELS 71 config PGTABLE_LEVELS
72 int 72 int
73 default 3 73 default 3
74 74
75 config AUDIT_ARCH 75 config AUDIT_ARCH
76 bool 76 bool
77 77
78 menu "System setup" 78 menu "System setup"
79 79
80 choice 80 choice
81 prompt "Alpha system type" 81 prompt "Alpha system type"
82 default ALPHA_GENERIC 82 default ALPHA_GENERIC
83 help 83 help
84 This is the system type of your hard 84 This is the system type of your hardware. A "generic" kernel will
85 run on any supported Alpha system. H 85 run on any supported Alpha system. However, if you configure a
86 kernel for your specific system, it 86 kernel for your specific system, it will be faster and smaller.
87 87
88 To find out what type of Alpha syste 88 To find out what type of Alpha system you have, you may want to
89 check out the Linux/Alpha FAQ, acces 89 check out the Linux/Alpha FAQ, accessible on the WWW from
90 <http://www.alphalinux.org/>. In sum 90 <http://www.alphalinux.org/>. In summary:
91 91
92 Alcor/Alpha-XLT AS 600, AS 500, 92 Alcor/Alpha-XLT AS 600, AS 500, XL-300, XL-366
93 DP264 DP264 / DS20 / E 93 DP264 DP264 / DS20 / ES40 / DS10 / DS10L
94 LX164 AlphaPC164-LX 94 LX164 AlphaPC164-LX
95 Miata Personal Worksta 95 Miata Personal Workstation 433/500/600 a/au
96 Marvel AlphaServer ES47 96 Marvel AlphaServer ES47 / ES80 / GS1280
97 Mikasa AS 1000 97 Mikasa AS 1000
98 Noritake AS 1000A, AS 600 98 Noritake AS 1000A, AS 600A, AS 800
99 PC164 AlphaPC164 99 PC164 AlphaPC164
100 Rawhide AS 1200, AS 4000 100 Rawhide AS 1200, AS 4000, AS 4100
101 Ruffian RPX164-2, AlphaP 101 Ruffian RPX164-2, AlphaPC164-UX, AlphaPC164-BX
102 SX164 AlphaPC164-SX 102 SX164 AlphaPC164-SX
103 Sable AS 2000, AS 2100 103 Sable AS 2000, AS 2100
104 Shark DS 20L 104 Shark DS 20L
105 Takara Takara (OEM) 105 Takara Takara (OEM)
106 Titan AlphaServer ES45 106 Titan AlphaServer ES45 / DS25 / DS15
107 Wildfire AlphaServer GS 4 107 Wildfire AlphaServer GS 40/80/160/320
108 108
109 If you don't know what to do, choose 109 If you don't know what to do, choose "generic".
110 110
111 config ALPHA_GENERIC 111 config ALPHA_GENERIC
112 bool "Generic" 112 bool "Generic"
113 depends on TTY 113 depends on TTY
114 select HAVE_EISA 114 select HAVE_EISA
115 help 115 help
116 A generic kernel will run on all sup 116 A generic kernel will run on all supported Alpha hardware.
117 117
118 config ALPHA_ALCOR 118 config ALPHA_ALCOR
119 bool "Alcor/Alpha-XLT" 119 bool "Alcor/Alpha-XLT"
120 select HAVE_EISA 120 select HAVE_EISA
121 help 121 help
122 For systems using the Digital ALCOR 122 For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
123 slices (Data Switch, DSW) - 208-pin 123 slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
124 Address, CIA) - a 383 pin plastic PG 124 Address, CIA) - a 383 pin plastic PGA). It provides a DRAM
125 controller (256-bit memory bus) and 125 controller (256-bit memory bus) and a PCI interface. It also does
126 all the work required to support an 126 all the work required to support an external Bcache and to maintain
127 memory coherence when a PCI device D 127 memory coherence when a PCI device DMAs into (or out of) memory.
128 128
129 config ALPHA_DP264 129 config ALPHA_DP264
130 bool "DP264" 130 bool "DP264"
131 help 131 help
132 Various 21264 systems with the tsuna 132 Various 21264 systems with the tsunami core logic chipset.
133 API Networks: 264DP, UP2000(+), CS20 133 API Networks: 264DP, UP2000(+), CS20;
134 Compaq: DS10(E,L), XP900, XP1000, DS 134 Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
135 135
136 config ALPHA_EIGER 136 config ALPHA_EIGER
137 bool "Eiger" 137 bool "Eiger"
138 help 138 help
139 Apparently an obscure OEM single-boa 139 Apparently an obscure OEM single-board computer based on the
140 Typhoon/Tsunami chipset family. Info 140 Typhoon/Tsunami chipset family. Information on it is scanty.
141 141
142 config ALPHA_LX164 142 config ALPHA_LX164
143 bool "LX164" 143 bool "LX164"
144 help 144 help
145 A technical overview of this board i 145 A technical overview of this board is available at
146 <http://www.unix-ag.org/Linux-Alpha/ 146 <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
147 147
148 config ALPHA_MARVEL 148 config ALPHA_MARVEL
149 bool "Marvel" 149 bool "Marvel"
150 help 150 help
151 AlphaServer ES47 / ES80 / GS1280 bas 151 AlphaServer ES47 / ES80 / GS1280 based on EV7.
152 152
153 config ALPHA_MIATA 153 config ALPHA_MIATA
154 bool "Miata" 154 bool "Miata"
155 select HAVE_EISA 155 select HAVE_EISA
156 help 156 help
157 The Digital PersonalWorkStation (PWS 157 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
158 or 600au). 158 or 600au).
159 159
160 config ALPHA_MIKASA 160 config ALPHA_MIKASA
161 bool "Mikasa" 161 bool "Mikasa"
162 help 162 help
163 AlphaServer 1000-based Alpha systems 163 AlphaServer 1000-based Alpha systems.
164 164
165 config ALPHA_NAUTILUS 165 config ALPHA_NAUTILUS
166 bool "Nautilus" 166 bool "Nautilus"
167 help 167 help
168 Alpha systems based on the AMD 751 & 168 Alpha systems based on the AMD 751 & ALI 1543C chipsets.
169 169
170 config ALPHA_NORITAKE 170 config ALPHA_NORITAKE
171 bool "Noritake" 171 bool "Noritake"
172 select HAVE_EISA 172 select HAVE_EISA
173 help 173 help
174 AlphaServer 1000A, AlphaServer 600A, 174 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
175 systems. 175 systems.
176 176
177 config ALPHA_PC164 177 config ALPHA_PC164
178 bool "PC164" 178 bool "PC164"
179 179
180 config ALPHA_RAWHIDE 180 config ALPHA_RAWHIDE
181 bool "Rawhide" 181 bool "Rawhide"
182 select HAVE_EISA 182 select HAVE_EISA
183 help 183 help
184 AlphaServer 1200, AlphaServer 4000 a 184 AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
185 See HOWTO at 185 See HOWTO at
186 <http://www.alphalinux.org/docs/rawh 186 <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
187 187
188 config ALPHA_RUFFIAN 188 config ALPHA_RUFFIAN
189 bool "Ruffian" 189 bool "Ruffian"
190 help 190 help
191 Samsung APC164UX. There is a page o 191 Samsung APC164UX. There is a page on known problems and workarounds
192 at <http://www.alphalinux.org/faq/FA 192 at <http://www.alphalinux.org/faq/FAQ-11.html>.
193 193
194 config ALPHA_RX164 194 config ALPHA_RX164
195 bool "RX164" 195 bool "RX164"
196 196
197 config ALPHA_SX164 197 config ALPHA_SX164
198 bool "SX164" 198 bool "SX164"
199 199
200 config ALPHA_SABLE 200 config ALPHA_SABLE
201 bool "Sable" 201 bool "Sable"
202 select HAVE_EISA 202 select HAVE_EISA
203 help 203 help
204 Digital AlphaServer 2000 and 2100-ba 204 Digital AlphaServer 2000 and 2100-based systems.
205 205
206 config ALPHA_SHARK 206 config ALPHA_SHARK
207 bool "Shark" 207 bool "Shark"
208 208
209 config ALPHA_TAKARA 209 config ALPHA_TAKARA
210 bool "Takara" 210 bool "Takara"
211 help 211 help
212 Alpha 11164-based OEM single-board c 212 Alpha 11164-based OEM single-board computer.
213 213
214 config ALPHA_TITAN 214 config ALPHA_TITAN
215 bool "Titan" 215 bool "Titan"
216 help 216 help
217 AlphaServer ES45/DS25 SMP based on E 217 AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
218 218
219 config ALPHA_WILDFIRE 219 config ALPHA_WILDFIRE
220 bool "Wildfire" 220 bool "Wildfire"
221 help 221 help
222 AlphaServer GS 40/80/160/320 SMP bas 222 AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
223 223
224 endchoice 224 endchoice
225 225
226 # clear all implied options (don't want defaul 226 # clear all implied options (don't want default values for those):
227 # Most of these machines have ISA slots; not e 227 # Most of these machines have ISA slots; not exactly sure which don't,
228 # and this doesn't activate hordes of code, so 228 # and this doesn't activate hordes of code, so do it always.
229 config ISA 229 config ISA
230 bool 230 bool
231 default y 231 default y
232 help 232 help
233 Find out whether you have ISA slots 233 Find out whether you have ISA slots on your motherboard. ISA is the
234 name of a bus system, i.e. the way t 234 name of a bus system, i.e. the way the CPU talks to the other stuff
235 inside your box. Other bus systems 235 inside your box. Other bus systems are PCI, EISA, MicroChannel
236 (MCA) or VESA. ISA is an older syst 236 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
237 newer boards don't support it. If y 237 newer boards don't support it. If you have ISA, say Y, otherwise N.
238 238
239 config ISA_DMA_API 239 config ISA_DMA_API
240 bool 240 bool
241 default y 241 default y
242 242
243 config ALPHA_CIA 243 config ALPHA_CIA
244 bool 244 bool
245 depends on ALPHA_MIATA || ALPHA_LX164 245 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_NORITAKE || ALPHA_MIKASA || ALPHA_PC164 || ALPHA_TAKARA || ALPHA_ALCOR
246 default y 246 default y
247 247
248 config ALPHA_EV56 248 config ALPHA_EV56
249 bool 249 bool
250 default y if ALPHA_ALCOR || ALPHA_RX16 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
251 251
252 config ALPHA_T2 252 config ALPHA_T2
253 bool 253 bool
254 depends on ALPHA_SABLE 254 depends on ALPHA_SABLE
255 default y 255 default y
256 256
257 config ALPHA_PYXIS 257 config ALPHA_PYXIS
258 bool 258 bool
259 depends on ALPHA_MIATA || ALPHA_LX164 259 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
260 default y 260 default y
261 261
262 config ALPHA_EV6 262 config ALPHA_EV6
263 bool 263 bool
264 depends on ALPHA_NAUTILUS || ALPHA_WIL 264 depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
265 default y 265 default y
266 266
267 config ALPHA_TSUNAMI 267 config ALPHA_TSUNAMI
268 bool 268 bool
269 depends on ALPHA_SHARK || ALPHA_DP264 269 depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
270 default y 270 default y
271 271
272 config ALPHA_EV67 272 config ALPHA_EV67
273 bool "EV67 (or later) CPU (speed > 600 273 bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
274 default y if ALPHA_NAUTILUS || ALPHA_W 274 default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
275 help 275 help
276 Is this a machine based on the EV67 276 Is this a machine based on the EV67 core? If in doubt, select N here
277 and the machine will be treated as a 277 and the machine will be treated as an EV6.
278 278
279 config ALPHA_MCPCIA 279 config ALPHA_MCPCIA
280 bool 280 bool
281 depends on ALPHA_RAWHIDE 281 depends on ALPHA_RAWHIDE
282 default y 282 default y
283 283
284 config ALPHA_POLARIS 284 config ALPHA_POLARIS
285 bool 285 bool
286 depends on ALPHA_RX164 286 depends on ALPHA_RX164
287 default y 287 default y
288 288
289 config ALPHA_IRONGATE 289 config ALPHA_IRONGATE
290 bool 290 bool
291 depends on ALPHA_NAUTILUS 291 depends on ALPHA_NAUTILUS
292 default y 292 default y
293 293
294 config GENERIC_HWEIGHT 294 config GENERIC_HWEIGHT
295 bool 295 bool
296 default y if !ALPHA_EV67 296 default y if !ALPHA_EV67
297 297
298 config ALPHA_BROKEN_IRQ_MASK 298 config ALPHA_BROKEN_IRQ_MASK
299 bool 299 bool
300 depends on ALPHA_GENERIC || ALPHA_PC16 300 depends on ALPHA_GENERIC || ALPHA_PC164
301 default y 301 default y
302 302
303 config VGA_HOSE 303 config VGA_HOSE
304 bool 304 bool
305 depends on VGA_CONSOLE && (ALPHA_GENER 305 depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
306 default y 306 default y
307 help 307 help
308 Support VGA on an arbitrary hose; ne 308 Support VGA on an arbitrary hose; needed for several platforms
309 which always have multiple hoses, an 309 which always have multiple hoses, and whose consoles support it.
310 310
311 311
312 config ALPHA_QEMU 312 config ALPHA_QEMU
313 bool "Run under QEMU emulation" 313 bool "Run under QEMU emulation"
314 depends on !ALPHA_GENERIC 314 depends on !ALPHA_GENERIC
315 help 315 help
316 Assume the presence of special featu 316 Assume the presence of special features supported by QEMU PALcode
317 that reduce the overhead of system e 317 that reduce the overhead of system emulation.
318 318
319 Generic kernels will auto-detect QEM 319 Generic kernels will auto-detect QEMU. But when building a
320 system-specific kernel, the assumpti 320 system-specific kernel, the assumption is that we want to
321 eliminate as many runtime tests as p 321 eliminate as many runtime tests as possible.
322 322
323 If unsure, say N. 323 If unsure, say N.
324 324
325 325
326 config ALPHA_SRM 326 config ALPHA_SRM
327 bool "Use SRM as bootloader" if ALPHA_ 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 328 depends on TTY
329 default y if ALPHA_MIKASA || ALPHA_SAB 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 330 help
331 There are two different types of boo 331 There are two different types of booting firmware on Alphas: SRM,
332 which is command line driven, and AR 332 which is command line driven, and ARC, which uses menus and arrow
333 keys. Details about the Linux/Alpha 333 keys. Details about the Linux/Alpha booting process are contained in
334 the Linux/Alpha FAQ, accessible on t 334 the Linux/Alpha FAQ, accessible on the WWW from
335 <http://www.alphalinux.org/>. 335 <http://www.alphalinux.org/>.
336 336
337 The usual way to load Linux on an Al 337 The usual way to load Linux on an Alpha machine is to use MILO
338 (a bootloader that lets you pass com 338 (a bootloader that lets you pass command line parameters to the
339 kernel just like lilo does for the x 339 kernel just like lilo does for the x86 architecture) which can be
340 loaded either from ARC or can be ins 340 loaded either from ARC or can be installed directly as a permanent
341 firmware replacement from floppy (wh 341 firmware replacement from floppy (which requires changing a certain
342 jumper on the motherboard). If you w 342 jumper on the motherboard). If you want to do either of these, say N
343 here. If MILO doesn't work on your s 343 here. If MILO doesn't work on your system (true for Jensen
344 motherboards), you can bypass it alt 344 motherboards), you can bypass it altogether and boot Linux directly
345 from an SRM console; say Y here in o 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 di 346 won't be able to boot from an IDE disk using SRM.
347 347
348 If unsure, say N. 348 If unsure, say N.
349 349
350 config ARCH_MAY_HAVE_PC_FDC 350 config ARCH_MAY_HAVE_PC_FDC
351 def_bool y 351 def_bool y
352 352
353 config SMP 353 config SMP
354 bool "Symmetric multi-processing suppo 354 bool "Symmetric multi-processing support"
355 depends on ALPHA_SABLE || ALPHA_RAWHID 355 depends on ALPHA_SABLE || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
356 help 356 help
357 This enables support for systems wit 357 This enables support for systems with more than one CPU. If you have
358 a system with only one CPU, say N. I 358 a system with only one CPU, say N. If you have a system with more
359 than one CPU, say Y. 359 than one CPU, say Y.
360 360
361 If you say N here, the kernel will r 361 If you say N here, the kernel will run on uni- and multiprocessor
362 machines, but will use only one CPU 362 machines, but will use only one CPU of a multiprocessor machine. If
363 you say Y here, the kernel will run 363 you say Y here, the kernel will run on many, but not all,
364 uniprocessor machines. On a uniproce 364 uniprocessor machines. On a uniprocessor machine, the kernel
365 will run faster if you say N here. 365 will run faster if you say N here.
366 366
367 See also the SMP-HOWTO available at 367 See also the SMP-HOWTO available at
368 <https://www.tldp.org/docs.html#howt 368 <https://www.tldp.org/docs.html#howto>.
369 369
370 If you don't know what to do here, s 370 If you don't know what to do here, say N.
371 371
372 config NR_CPUS 372 config NR_CPUS
373 int "Maximum number of CPUs (2-32)" 373 int "Maximum number of CPUs (2-32)"
374 range 2 32 374 range 2 32
375 depends on SMP 375 depends on SMP
376 default "32" if ALPHA_GENERIC || ALPHA 376 default "32" if ALPHA_GENERIC || ALPHA_MARVEL
377 default "4" if !ALPHA_GENERIC && !ALPH 377 default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
378 help 378 help
379 MARVEL support can handle a maximum 379 MARVEL support can handle a maximum of 32 CPUs, all the others
380 with working support have a maximum 380 with working support have a maximum of 4 CPUs.
381 381
382 config ARCH_SPARSEMEM_ENABLE 382 config ARCH_SPARSEMEM_ENABLE
383 bool "Sparse Memory Support" 383 bool "Sparse Memory Support"
384 help 384 help
385 Say Y to support efficient handling 385 Say Y to support efficient handling of discontiguous physical memory,
386 for systems that have huge holes in 386 for systems that have huge holes in the physical address space.
387 387
388 config ALPHA_WTINT 388 config ALPHA_WTINT
389 bool "Use WTINT" if ALPHA_SRM || ALPHA 389 bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
390 default y if ALPHA_QEMU 390 default y if ALPHA_QEMU
391 default n if ALPHA_EV56 391 default n if ALPHA_EV56
392 default n if !ALPHA_SRM && !ALPHA_GENE 392 default n if !ALPHA_SRM && !ALPHA_GENERIC
393 default y if SMP 393 default y if SMP
394 help 394 help
395 The Wait for Interrupt (WTINT) PALca 395 The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
396 to sleep until the next interrupt. 396 to sleep until the next interrupt. This may reduce the power
397 consumed, and the heat produced by t 397 consumed, and the heat produced by the computer. However, it has
398 the side effect of making the cycle 398 the side effect of making the cycle counter unreliable as a timing
399 device across the sleep. 399 device across the sleep.
400 400
401 For emulation under QEMU, definitely 401 For emulation under QEMU, definitely say Y here, as we have other
402 mechanisms for measuring time than t 402 mechanisms for measuring time than the cycle counter.
403 403
404 For EV4 (but not LCA), EV5 and EV56 404 For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
405 MILO, sleep mode is not supported so 405 MILO, sleep mode is not supported so you might as well say N here.
406 406
407 For SMP systems we cannot use the cy 407 For SMP systems we cannot use the cycle counter for timing anyway,
408 so you might as well say Y here. 408 so you might as well say Y here.
409 409
410 If unsure, say N. 410 If unsure, say N.
411 411
412 # LARGE_VMALLOC is racy, if you *really* need 412 # LARGE_VMALLOC is racy, if you *really* need it then fix it first
413 config ALPHA_LARGE_VMALLOC 413 config ALPHA_LARGE_VMALLOC
414 bool 414 bool
415 help 415 help
416 Process creation and other aspects o 416 Process creation and other aspects of virtual memory management can
417 be streamlined if we restrict the ke 417 be streamlined if we restrict the kernel to one PGD for all vmalloc
418 allocations. This equates to about 418 allocations. This equates to about 8GB.
419 419
420 Under normal circumstances, this is 420 Under normal circumstances, this is so far and above what is needed
421 as to be laughable. However, there 421 as to be laughable. However, there are certain applications (such
422 as benchmark-grade in-kernel web ser 422 as benchmark-grade in-kernel web serving) that can make use of as
423 much vmalloc space as is available. 423 much vmalloc space as is available.
424 424
425 Say N unless you know you need gobs 425 Say N unless you know you need gobs and gobs of vmalloc space.
426 426
427 config VERBOSE_MCHECK 427 config VERBOSE_MCHECK
428 bool "Verbose Machine Checks" 428 bool "Verbose Machine Checks"
429 429
430 config VERBOSE_MCHECK_ON 430 config VERBOSE_MCHECK_ON
431 int "Verbose Printing Mode (0=off, 1=o 431 int "Verbose Printing Mode (0=off, 1=on, 2=all)"
432 depends on VERBOSE_MCHECK 432 depends on VERBOSE_MCHECK
433 default 1 433 default 1
434 help 434 help
435 This option allows the default print 435 This option allows the default printing mode to be set, and then
436 possibly overridden by a boot comman 436 possibly overridden by a boot command argument.
437 437
438 For example, if one wanted the optio 438 For example, if one wanted the option of printing verbose
439 machine checks, but wanted the defau 439 machine checks, but wanted the default to be as if verbose
440 machine check printing was turned of 440 machine check printing was turned off, then one would choose
441 the printing mode to be 0. Then, upo 441 the printing mode to be 0. Then, upon reboot, one could add
442 the boot command line "verbose_mchec 442 the boot command line "verbose_mcheck=1" to get the normal
443 verbose machine check printing, or " 443 verbose machine check printing, or "verbose_mcheck=2" to get
444 the maximum information available. 444 the maximum information available.
445 445
446 Take the default (1) unless you want 446 Take the default (1) unless you want more control or more info.
447 447
448 choice 448 choice
449 prompt "Timer interrupt frequency (HZ) 449 prompt "Timer interrupt frequency (HZ)?"
450 default HZ_128 if ALPHA_QEMU 450 default HZ_128 if ALPHA_QEMU
451 default HZ_1200 if ALPHA_RAWHIDE 451 default HZ_1200 if ALPHA_RAWHIDE
452 default HZ_1024 452 default HZ_1024
453 help 453 help
454 The frequency at which timer interru 454 The frequency at which timer interrupts occur. A high frequency
455 minimizes latency, whereas a low fre 455 minimizes latency, whereas a low frequency minimizes overhead of
456 process accounting. The later effec 456 process accounting. The later effect is especially significant
457 when being run under QEMU. 457 when being run under QEMU.
458 458
459 Note that some Alpha hardware cannot 459 Note that some Alpha hardware cannot change the interrupt frequency
460 of the timer. If unsure, say 1024 ( 460 of the timer. If unsure, say 1024 (or 1200 for Rawhide).
461 461
462 config HZ_32 462 config HZ_32
463 bool "32 Hz" 463 bool "32 Hz"
464 config HZ_64 464 config HZ_64
465 bool "64 Hz" 465 bool "64 Hz"
466 config HZ_128 466 config HZ_128
467 bool "128 Hz" 467 bool "128 Hz"
468 config HZ_256 468 config HZ_256
469 bool "256 Hz" 469 bool "256 Hz"
470 config HZ_1024 470 config HZ_1024
471 bool "1024 Hz" 471 bool "1024 Hz"
472 config HZ_1200 472 config HZ_1200
473 bool "1200 Hz" 473 bool "1200 Hz"
474 endchoice 474 endchoice
475 475
476 config HZ 476 config HZ
477 int 477 int
478 default 32 if HZ_32 478 default 32 if HZ_32
479 default 64 if HZ_64 479 default 64 if HZ_64
480 default 128 if HZ_128 480 default 128 if HZ_128
481 default 256 if HZ_256 481 default 256 if HZ_256
482 default 1200 if HZ_1200 482 default 1200 if HZ_1200
483 default 1024 483 default 1024
484 484
485 config SRM_ENV 485 config SRM_ENV
486 tristate "SRM environment through proc 486 tristate "SRM environment through procfs"
487 depends on PROC_FS 487 depends on PROC_FS
488 help 488 help
489 If you enable this option, a subdire 489 If you enable this option, a subdirectory inside /proc called
490 /proc/srm_environment will give you 490 /proc/srm_environment will give you access to the all important
491 SRM environment variables (those whi 491 SRM environment variables (those which have a name) and also
492 to all others (by their internal num 492 to all others (by their internal number).
493 493
494 SRM is something like a BIOS for Alp 494 SRM is something like a BIOS for Alpha machines. There are some
495 other such BIOSes, like AlphaBIOS, w 495 other such BIOSes, like AlphaBIOS, which this driver cannot
496 support (hey, that's not SRM!). 496 support (hey, that's not SRM!).
497 497
498 Despite the fact that this driver do 498 Despite the fact that this driver doesn't work on all Alphas (but
499 only on those which have SRM as thei 499 only on those which have SRM as their firmware), it's save to
500 build it even if your particular mac 500 build it even if your particular machine doesn't know about SRM
501 (or if you intend to compile a gener 501 (or if you intend to compile a generic kernel). It will simply
502 not create those subdirectory in /pr 502 not create those subdirectory in /proc (and give you some warning,
503 of course). 503 of course).
504 504
505 This driver is also available as a m 505 This driver is also available as a module and will be called
506 srm_env then. 506 srm_env then.
507 507
508 endmenu 508 endmenu
509 509
510 # DUMMY_CONSOLE may be defined in drivers/vide 510 # DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
511 # but we also need it if VGA_HOSE is set 511 # but we also need it if VGA_HOSE is set
512 config DUMMY_CONSOLE 512 config DUMMY_CONSOLE
513 bool 513 bool
514 depends on VGA_HOSE 514 depends on VGA_HOSE
515 default y 515 default y
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