1 # SPDX-License-Identifier: GPL-2.0-only !! 1 # SPDX-License-Identifier: GPL-2.0
2 # !! 2 config ALPHA
3 # Copyright (C) 2004, 2007-2010, 2011-2012 Syn !! 3 bool
4 # !! 4 default y
5 !! 5 select ARCH_MIGHT_HAVE_PC_PARPORT
6 config ARC !! 6 select ARCH_MIGHT_HAVE_PC_SERIO
7 def_bool y !! 7 select ARCH_NO_PREEMPT
8 select ARC_TIMERS !! 8 select ARCH_NO_SG_CHAIN
9 select ARCH_HAS_CACHE_LINE_SIZE !! 9 select ARCH_USE_CMPXCHG_LOCKREF
10 select ARCH_HAS_DEBUG_VM_PGTABLE !! 10 select FORCE_PCI if !ALPHA_JENSEN
11 select ARCH_HAS_DMA_PREP_COHERENT !! 11 select PCI_DOMAINS if PCI
12 select ARCH_HAS_PTE_SPECIAL !! 12 select PCI_SYSCALL if PCI
13 select ARCH_HAS_SETUP_DMA_OPS !! 13 select HAVE_AOUT
14 select ARCH_HAS_SYNC_DMA_FOR_CPU !! 14 select HAVE_ASM_MODVERSIONS
15 select ARCH_HAS_SYNC_DMA_FOR_DEVICE !! 15 select HAVE_IDE
16 select ARCH_NEED_CMPXCHG_1_EMU !! 16 select HAVE_OPROFILE
17 select ARCH_SUPPORTS_ATOMIC_RMW if ARC !! 17 select HAVE_PCSPKR_PLATFORM
18 select ARCH_32BIT_OFF_T !! 18 select HAVE_PERF_EVENTS
19 select BUILDTIME_TABLE_SORT !! 19 select NEED_DMA_MAP_STATE
20 select CLONE_BACKWARDS !! 20 select NEED_SG_DMA_LENGTH
21 select COMMON_CLK !! 21 select VIRT_TO_BUS
22 select DMA_DIRECT_REMAP !! 22 select GENERIC_IRQ_PROBE
23 select GENERIC_ATOMIC64 if !ISA_ARCV2 !! 23 select GENERIC_PCI_IOMAP if PCI
24 # for now, we don't need GENERIC_IRQ_P !! 24 select AUTO_IRQ_AFFINITY if SMP
25 select GENERIC_IRQ_SHOW 25 select GENERIC_IRQ_SHOW
26 select GENERIC_PCI_IOMAP !! 26 select ARCH_WANT_IPC_PARSE_VERSION
27 select GENERIC_PENDING_IRQ if SMP !! 27 select ARCH_HAVE_NMI_SAFE_CMPXCHG
28 select GENERIC_SCHED_CLOCK !! 28 select AUDIT_ARCH
>> 29 select GENERIC_CLOCKEVENTS
>> 30 select GENERIC_CPU_VULNERABILITIES
29 select GENERIC_SMP_IDLE_THREAD 31 select GENERIC_SMP_IDLE_THREAD
30 select GENERIC_IOREMAP !! 32 select GENERIC_STRNCPY_FROM_USER
31 select GENERIC_STRNCPY_FROM_USER if MM !! 33 select GENERIC_STRNLEN_USER
32 select GENERIC_STRNLEN_USER if MMU !! 34 select HAVE_ARCH_AUDITSYSCALL
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 35 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 36 select MODULES_USE_ELF_RELA
50 select OF !! 37 select ODD_RT_SIGACTION
51 select OF_EARLY_FLATTREE !! 38 select OLD_SIGSUSPEND
52 select PCI_SYSCALL if PCI !! 39 select CPU_NO_EFFICIENT_FFS if !ALPHA_EV67
53 select HAVE_ARCH_JUMP_LABEL if ISA_ARC !! 40 select MMU_GATHER_NO_RANGE
54 select TRACE_IRQFLAGS_SUPPORT !! 41 help
55 select HAVE_EBPF_JIT if ISA_ARCV2 !! 42 The Alpha is a 64-bit general-purpose processor designed and
>> 43 marketed by the Digital Equipment Corporation of blessed memory,
>> 44 now Hewlett-Packard. The Alpha Linux project has a home page at
>> 45 <http://www.alphalinux.org/>.
56 46
57 config LOCKDEP_SUPPORT !! 47 config 64BIT
58 def_bool y 48 def_bool y
59 49
60 config SCHED_OMIT_FRAME_POINTER !! 50 config MMU
61 def_bool y !! 51 bool
>> 52 default y
62 53
63 config GENERIC_CSUM !! 54 config ARCH_HAS_ILOG2_U32
64 def_bool y !! 55 bool
>> 56 default n
65 57
66 config ARCH_FLATMEM_ENABLE !! 58 config ARCH_HAS_ILOG2_U64
67 def_bool y !! 59 bool
>> 60 default n
68 61
69 config MMU !! 62 config GENERIC_CALIBRATE_DELAY
70 def_bool y !! 63 bool
>> 64 default y
71 65
72 config NO_IOPORT_MAP !! 66 config ZONE_DMA
73 def_bool y !! 67 bool
>> 68 default y
74 69
75 config GENERIC_CALIBRATE_DELAY !! 70 config GENERIC_ISA_DMA
76 def_bool y !! 71 bool
>> 72 default y
77 73
78 config GENERIC_HWEIGHT !! 74 config PGTABLE_LEVELS
79 def_bool y !! 75 int
>> 76 default 3
80 77
81 config STACKTRACE_SUPPORT !! 78 config AUDIT_ARCH
82 def_bool y !! 79 bool
83 select STACKTRACE <<
84 80
85 menu "ARC Architecture Configuration" !! 81 menu "System setup"
86 82
87 menu "ARC Platform/SoC/Board" !! 83 choice
>> 84 prompt "Alpha system type"
>> 85 default ALPHA_GENERIC
>> 86 ---help---
>> 87 This is the system type of your hardware. A "generic" kernel will
>> 88 run on any supported Alpha system. However, if you configure a
>> 89 kernel for your specific system, it will be faster and smaller.
88 90
89 source "arch/arc/plat-tb10x/Kconfig" !! 91 To find out what type of Alpha system you have, you may want to
90 source "arch/arc/plat-axs10x/Kconfig" !! 92 check out the Linux/Alpha FAQ, accessible on the WWW from
91 source "arch/arc/plat-hsdk/Kconfig" !! 93 <http://www.alphalinux.org/>. In summary:
92 94
93 endmenu !! 95 Alcor/Alpha-XLT AS 600, AS 500, XL-300, XL-366
>> 96 Alpha-XL XL-233, XL-266
>> 97 AlphaBook1 Alpha laptop
>> 98 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, AS 400
>> 99 Cabriolet AlphaPC64, AlphaPCI64
>> 100 DP264 DP264 / DS20 / ES40 / DS10 / DS10L
>> 101 EB164 EB164 21164 evaluation board
>> 102 EB64+ EB64+ 21064 evaluation board
>> 103 EB66 EB66 21066 evaluation board
>> 104 EB66+ EB66+ 21066 evaluation board
>> 105 Jensen DECpc 150, DEC 2000 models 300, 500
>> 106 LX164 AlphaPC164-LX
>> 107 Lynx AS 2100A
>> 108 Miata Personal Workstation 433/500/600 a/au
>> 109 Marvel AlphaServer ES47 / ES80 / GS1280
>> 110 Mikasa AS 1000
>> 111 Noname AXPpci33, UDB (Multia)
>> 112 Noritake AS 1000A, AS 600A, AS 800
>> 113 PC164 AlphaPC164
>> 114 Rawhide AS 1200, AS 4000, AS 4100
>> 115 Ruffian RPX164-2, AlphaPC164-UX, AlphaPC164-BX
>> 116 SX164 AlphaPC164-SX
>> 117 Sable AS 2000, AS 2100
>> 118 Shark DS 20L
>> 119 Takara Takara (OEM)
>> 120 Titan AlphaServer ES45 / DS25 / DS15
>> 121 Wildfire AlphaServer GS 40/80/160/320
94 122
95 choice !! 123 If you don't know what to do, choose "generic".
96 prompt "ARC Instruction Set" <<
97 default ISA_ARCV2 <<
98 124
99 config ISA_ARCOMPACT !! 125 config ALPHA_GENERIC
100 bool "ARCompact ISA" !! 126 bool "Generic"
101 select CPU_NO_EFFICIENT_FFS !! 127 depends on TTY
>> 128 select HAVE_EISA
102 help 129 help
103 The original ARC ISA of ARC600/700 c !! 130 A generic kernel will run on all supported Alpha hardware.
104 131
105 config ISA_ARCV2 !! 132 config ALPHA_ALCOR
106 bool "ARC ISA v2" !! 133 bool "Alcor/Alpha-XLT"
107 select ARC_TIMERS_64BIT !! 134 select HAVE_EISA
108 help 135 help
109 ISA for the Next Generation ARC-HS c !! 136 For systems using the Digital ALCOR chipset: 5 chips (4, 64-bit data
>> 137 slices (Data Switch, DSW) - 208-pin PQFP and 1 control (Control, I/O
>> 138 Address, CIA) - a 383 pin plastic PGA). It provides a DRAM
>> 139 controller (256-bit memory bus) and a PCI interface. It also does
>> 140 all the work required to support an external Bcache and to maintain
>> 141 memory coherence when a PCI device DMAs into (or out of) memory.
110 142
111 endchoice !! 143 config ALPHA_XL
112 !! 144 bool "Alpha-XL"
113 menu "ARC CPU Configuration" !! 145 help
>> 146 XL-233 and XL-266-based Alpha systems.
114 147
115 choice !! 148 config ALPHA_BOOK1
116 prompt "ARC Core" !! 149 bool "AlphaBook1"
117 default ARC_CPU_770 if ISA_ARCOMPACT !! 150 help
118 default ARC_CPU_HS if ISA_ARCV2 !! 151 Dec AlphaBook1/Burns Alpha-based laptops.
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... <<
150 152
151 endchoice !! 153 config ALPHA_AVANTI_CH
>> 154 bool "Avanti"
152 155
153 config ARC_TUNE_MCPU !! 156 config ALPHA_CABRIOLET
154 string "Override default -mcpu compile !! 157 bool "Cabriolet"
155 default "" !! 158 help
156 help !! 159 Cabriolet AlphaPC64, AlphaPCI64 systems. Derived from EB64+ but now
157 Override default -mcpu=xxx compiler !! 160 baby-AT with Flash boot ROM, no on-board SCSI or Ethernet. 3 ISA
158 the ISA version) with the specified !! 161 slots, 4 PCI slots (one pair are on a shared slot), uses plug-in
159 NOTE: If specified flag isn't suppor !! 162 Bcache SIMMs. Requires power supply with 3.3V output.
160 ISA default value will be used as a <<
161 163
162 config CPU_BIG_ENDIAN !! 164 config ALPHA_DP264
163 bool "Enable Big Endian Mode" !! 165 bool "DP264"
164 help 166 help
165 Build kernel for Big Endian Mode of !! 167 Various 21264 systems with the tsunami core logic chipset.
>> 168 API Networks: 264DP, UP2000(+), CS20;
>> 169 Compaq: DS10(E,L), XP900, XP1000, DS20(E), ES40.
166 170
167 config SMP !! 171 config ALPHA_EB164
168 bool "Symmetric Multi-Processing" !! 172 bool "EB164"
169 select ARC_MCIP if ISA_ARCV2 <<
170 help 173 help
171 This enables support for systems wit !! 174 EB164 21164 evaluation board from DEC. Uses 21164 and ALCOR. Has
>> 175 ISA and PCI expansion (3 ISA slots, 2 64-bit PCI slots (one is
>> 176 shared with an ISA slot) and 2 32-bit PCI slots. Uses plus-in
>> 177 Bcache SIMMs. I/O sub-system provides SuperI/O (2S, 1P, FD), KBD,
>> 178 MOUSE (PS2 style), RTC/NVRAM. Boot ROM is Flash. PC-AT-sized
>> 179 motherboard. Requires power supply with 3.3V output.
172 180
173 if SMP !! 181 config ALPHA_EB64P_CH
>> 182 bool "EB64+"
174 183
175 config NR_CPUS !! 184 config ALPHA_EB66
176 int "Maximum number of CPUs (2-4096)" !! 185 bool "EB66"
177 range 2 4096 <<
178 default "4" <<
179 <<
180 config ARC_SMP_HALT_ON_RESET <<
181 bool "Enable Halt-on-reset boot mode" <<
182 help <<
183 In SMP configuration cores can be co <<
184 or they could all start at same time <<
185 masters are parked until Master kick <<
186 at designated entry point. For other <<
187 entry point and spin wait for Master <<
188 <<
189 endif #SMP <<
190 <<
191 config ARC_MCIP <<
192 bool "ARConnect Multicore IP (MCIP) Su <<
193 depends on ISA_ARCV2 <<
194 default y if SMP <<
195 help 186 help
196 This IP block enables SMP in ARC-HS3 !! 187 A Digital DS group board. Uses 21066 or 21066A. I/O sub-system is
197 It provides for cross-core interrupt !! 188 identical to EB64+. Baby PC-AT size. Runs from standard PC power
198 hardware semaphores, shared memory,. !! 189 supply. The EB66 schematic was published as a marketing poster
>> 190 advertising the 21066 as "the first microprocessor in the world with
>> 191 embedded PCI".
199 192
200 menuconfig ARC_CACHE !! 193 config ALPHA_EB66P
201 bool "Enable Cache Support" !! 194 bool "EB66+"
202 default y !! 195 help
>> 196 Later variant of the EB66 board.
203 197
204 if ARC_CACHE !! 198 config ALPHA_EIGER
>> 199 bool "Eiger"
>> 200 help
>> 201 Apparently an obscure OEM single-board computer based on the
>> 202 Typhoon/Tsunami chipset family. Information on it is scanty.
205 203
206 config ARC_CACHE_LINE_SHIFT !! 204 config ALPHA_JENSEN
207 int "Cache Line Length (as power of 2) !! 205 bool "Jensen"
208 range 5 7 !! 206 depends on BROKEN
209 default "6" !! 207 select HAVE_EISA
210 help 208 help
211 Starting with ARC700 4.9, Cache line !! 209 DEC PC 150 AXP (aka Jensen): This is a very old Digital system - one
212 This option specifies "N", with Line !! 210 of the first-generation Alpha systems. A number of these systems
213 So line lengths of 32, 64, 128 are s !! 211 seem to be available on the second- hand market. The Jensen is a
214 Linux only supports same line length !! 212 floor-standing tower system which originally used a 150MHz 21064 It
>> 213 used programmable logic to interface a 486 EISA I/O bridge to the
>> 214 CPU.
215 215
216 config ARC_HAS_ICACHE !! 216 config ALPHA_LX164
217 bool "Use Instruction Cache" !! 217 bool "LX164"
218 default y !! 218 help
>> 219 A technical overview of this board is available at
>> 220 <http://www.unix-ag.org/Linux-Alpha/Architectures/LX164.html>.
219 221
220 config ARC_HAS_DCACHE !! 222 config ALPHA_LYNX
221 bool "Use Data Cache" !! 223 bool "Lynx"
222 default y !! 224 select HAVE_EISA
>> 225 help
>> 226 AlphaServer 2100A-based systems.
223 227
224 config ARC_CACHE_PAGES !! 228 config ALPHA_MARVEL
225 bool "Per Page Cache Control" !! 229 bool "Marvel"
226 default y <<
227 depends on ARC_HAS_ICACHE || ARC_HAS_D <<
228 help 230 help
229 This can be used to over-ride the gl !! 231 AlphaServer ES47 / ES80 / GS1280 based on EV7.
230 per-page basis (but only for pages a <<
231 Kernel Virtual address or User Virtu <<
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 <<
235 232
236 endif #ARC_CACHE !! 233 config ALPHA_MIATA
>> 234 bool "Miata"
>> 235 select HAVE_EISA
>> 236 help
>> 237 The Digital PersonalWorkStation (PWS 433a, 433au, 500a, 500au, 600a,
>> 238 or 600au).
237 239
238 config ARC_HAS_ICCM !! 240 config ALPHA_MIKASA
239 bool "Use ICCM" !! 241 bool "Mikasa"
240 help 242 help
241 Single Cycle RAMS to store Fast Path !! 243 AlphaServer 1000-based Alpha systems.
242 244
243 config ARC_ICCM_SZ !! 245 config ALPHA_NAUTILUS
244 int "ICCM Size in KB" !! 246 bool "Nautilus"
245 default "64" !! 247 help
246 depends on ARC_HAS_ICCM !! 248 Alpha systems based on the AMD 751 & ALI 1543C chipsets.
>> 249
>> 250 config ALPHA_NONAME_CH
>> 251 bool "Noname"
247 252
248 config ARC_HAS_DCCM !! 253 config ALPHA_NORITAKE
249 bool "Use DCCM" !! 254 bool "Noritake"
>> 255 select HAVE_EISA
250 help 256 help
251 Single Cycle RAMS to store Fast Path !! 257 AlphaServer 1000A, AlphaServer 600A, and AlphaServer 800-based
>> 258 systems.
252 259
253 config ARC_DCCM_SZ !! 260 config ALPHA_PC164
254 int "DCCM Size in KB" !! 261 bool "PC164"
255 default "64" <<
256 depends on ARC_HAS_DCCM <<
257 262
258 config ARC_DCCM_BASE !! 263 config ALPHA_P2K
259 hex "DCCM map address" !! 264 bool "Platform2000"
260 default "0xA0000000" <<
261 depends on ARC_HAS_DCCM <<
262 265
263 choice !! 266 config ALPHA_RAWHIDE
264 prompt "MMU Version" !! 267 bool "Rawhide"
265 default ARC_MMU_V3 if ISA_ARCOMPACT !! 268 select HAVE_EISA
266 default ARC_MMU_V4 if ISA_ARCV2 !! 269 help
267 !! 270 AlphaServer 1200, AlphaServer 4000 and AlphaServer 4100 machines.
268 config ARC_MMU_V3 !! 271 See HOWTO at
269 bool "MMU v3" !! 272 <http://www.alphalinux.org/docs/rawhide/4100_install.shtml>.
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 <<
279 273
280 endchoice !! 274 config ALPHA_RUFFIAN
>> 275 bool "Ruffian"
>> 276 help
>> 277 Samsung APC164UX. There is a page on known problems and workarounds
>> 278 at <http://www.alphalinux.org/faq/FAQ-11.html>.
281 279
>> 280 config ALPHA_RX164
>> 281 bool "RX164"
282 282
283 choice !! 283 config ALPHA_SX164
284 prompt "MMU Page Size" !! 284 bool "SX164"
285 default ARC_PAGE_SIZE_8K <<
286 285
287 config ARC_PAGE_SIZE_8K !! 286 config ALPHA_SABLE
288 bool "8KB" !! 287 bool "Sable"
289 select HAVE_PAGE_SIZE_8KB !! 288 select HAVE_EISA
290 help !! 289 help
291 Choose between 8k vs 16k !! 290 Digital AlphaServer 2000 and 2100-based systems.
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 <<
301 291
302 endchoice !! 292 config ALPHA_SHARK
>> 293 bool "Shark"
303 294
304 choice !! 295 config ALPHA_TAKARA
305 prompt "MMU Super Page Size" !! 296 bool "Takara"
306 depends on ISA_ARCV2 && TRANSPARENT_HU !! 297 help
307 default ARC_HUGEPAGE_2M !! 298 Alpha 11164-based OEM single-board computer.
308 299
309 config ARC_HUGEPAGE_2M !! 300 config ALPHA_TITAN
310 bool "2MB" !! 301 bool "Titan"
>> 302 help
>> 303 AlphaServer ES45/DS25 SMP based on EV68 and Titan chipset.
311 304
312 config ARC_HUGEPAGE_16M !! 305 config ALPHA_WILDFIRE
313 bool "16MB" !! 306 bool "Wildfire"
>> 307 help
>> 308 AlphaServer GS 40/80/160/320 SMP based on the EV67 core.
314 309
315 endchoice 310 endchoice
316 311
317 config PGTABLE_LEVELS !! 312 # clear all implied options (don't want default values for those):
318 int "Number of Page table levels" !! 313 # Most of these machines have ISA slots; not exactly sure which don't,
319 default 2 !! 314 # and this doesn't activate hordes of code, so do it always.
>> 315 config ISA
>> 316 bool
>> 317 default y
>> 318 help
>> 319 Find out whether you have ISA slots on your motherboard. ISA is the
>> 320 name of a bus system, i.e. the way the CPU talks to the other stuff
>> 321 inside your box. Other bus systems are PCI, EISA, MicroChannel
>> 322 (MCA) or VESA. ISA is an older system, now being displaced by PCI;
>> 323 newer boards don't support it. If you have ISA, say Y, otherwise N.
320 324
321 config ARC_COMPACT_IRQ_LEVELS !! 325 config ISA_DMA_API
322 depends on ISA_ARCOMPACT !! 326 bool
323 bool "Setup Timer IRQ as high Priority !! 327 default y
324 # if SMP, LV2 enabled ONLY if ARC impl <<
325 depends on !SMP <<
326 328
327 config ARC_FPU_SAVE_RESTORE !! 329 config ALPHA_NONAME
328 bool "Enable FPU state persistence acr !! 330 bool
>> 331 depends on ALPHA_BOOK1 || ALPHA_NONAME_CH
>> 332 default y
329 help 333 help
330 ARCompact FPU has internal registers !! 334 The AXPpci33 (aka NoName), is based on the EB66 (includes the Multia
331 Floating Point operations. There are !! 335 UDB). This design was produced by Digital's Technical OEM (TOEM)
332 for floating point exceptions and ro !! 336 group. It uses the 21066 processor running at 166MHz or 233MHz. It
333 preserved across task context switch !! 337 is a baby-AT size, and runs from a standard PC power supply. It has
>> 338 5 ISA slots and 3 PCI slots (one pair are a shared slot). There are
>> 339 2 versions, with either PS/2 or large DIN connectors for the
>> 340 keyboard.
334 341
335 config ARC_CANT_LLSC !! 342 config ALPHA_EV4
336 def_bool n !! 343 bool
>> 344 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
>> 345 default y if !ALPHA_LYNX
337 346
338 config ARC_HAS_LLSC !! 347 config ALPHA_LCA
339 bool "Insn: LLOCK/SCOND (efficient ato !! 348 bool
>> 349 depends on ALPHA_NONAME || ALPHA_EB66 || ALPHA_EB66P || ALPHA_P2K
340 default y 350 default y
341 depends on !ARC_CANT_LLSC <<
342 351
343 config ARC_HAS_SWAPE !! 352 config ALPHA_APECS
344 bool "Insn: SWAPE (endian-swap)" !! 353 bool
>> 354 depends on !ALPHA_PRIMO && (ALPHA_NORITAKE || ALPHA_MIKASA) || ALPHA_CABRIOLET || ALPHA_AVANTI_CH || ALPHA_EB64P_CH || ALPHA_XL
345 default y 355 default y
346 356
347 if ISA_ARCV2 !! 357 config ALPHA_EB64P
>> 358 bool
>> 359 depends on ALPHA_CABRIOLET || ALPHA_EB64P_CH
>> 360 default y
>> 361 help
>> 362 Uses 21064 or 21064A and APECs. Has ISA and PCI expansion (3 ISA,
>> 363 2 PCI, one pair are on a shared slot). Supports 36-bit DRAM SIMs.
>> 364 ISA bus generated by Intel SaturnI/O PCI-ISA bridge. On-board SCSI
>> 365 (NCR 810 on PCI) Ethernet (Digital 21040), KBD, MOUSE (PS2 style),
>> 366 SuperI/O (2S, 1P, FD), RTC/NVRAM. Boot ROM is EPROM. PC-AT size.
>> 367 Runs from standard PC power supply.
>> 368
>> 369 config ALPHA_EV5
>> 370 bool "EV5 CPU(s) (model 5/xxx)?" if ALPHA_LYNX
>> 371 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
>> 372
>> 373 config ALPHA_EV4
>> 374 bool
>> 375 default y if ALPHA_LYNX && !ALPHA_EV5
348 376
349 config ARC_USE_UNALIGNED_MEM_ACCESS !! 377 config ALPHA_CIA
350 bool "Enable unaligned access in HW" !! 378 bool
>> 379 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
351 default y 380 default y
352 select HAVE_EFFICIENT_UNALIGNED_ACCESS !! 381
>> 382 config ALPHA_EV56
>> 383 bool "EV56 CPU (speed >= 366MHz)?" if ALPHA_ALCOR
>> 384 default y if ALPHA_RX164 || ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN || ALPHA_PC164 || ALPHA_TAKARA
>> 385
>> 386 config ALPHA_EV56
>> 387 prompt "EV56 CPU (speed >= 333MHz)?"
>> 388 depends on ALPHA_NORITAKE || ALPHA_PRIMO
>> 389
>> 390 config ALPHA_EV56
>> 391 prompt "EV56 CPU (speed >= 400MHz)?"
>> 392 depends on ALPHA_RAWHIDE
>> 393
>> 394 config ALPHA_PRIMO
>> 395 bool "EV5 CPU daughtercard (model 5/xxx)?"
>> 396 depends on ALPHA_NORITAKE || ALPHA_MIKASA
353 help 397 help
354 The ARC HS architecture supports una !! 398 Say Y if you have an AS 1000 5/xxx or an AS 1000A 5/xxx.
355 which is disabled by default. Enable <<
356 hardware and use software to use it <<
357 399
358 config ARC_HAS_LL64 !! 400 config ALPHA_GAMMA
359 bool "Insn: 64bit LDD/STD" !! 401 bool "EV5 CPU(s) (model 5/xxx)?"
>> 402 depends on ALPHA_SABLE
360 help 403 help
361 Enable gcc to generate 64-bit load/s !! 404 Say Y if you have an AS 2000 5/xxx or an AS 2100 5/xxx.
362 ISA mandates even/odd registers to a <<
363 dest operands with 2 possible source <<
364 default y <<
365 405
366 config ARC_HAS_DIV_REM !! 406 config ALPHA_GAMMA
367 bool "Insn: div, divu, rem, remu" !! 407 bool
>> 408 depends on ALPHA_LYNX
368 default y 409 default y
369 410
370 config ARC_HAS_ACCL_REGS !! 411 config ALPHA_T2
371 bool "Reg Pair ACCL:ACCH (FPU and/or M !! 412 bool
>> 413 depends on ALPHA_SABLE || ALPHA_LYNX
372 default y 414 default y
373 help <<
374 Depending on the configuration, CPU <<
375 (also referred to as r58:r59). These <<
376 kernel needs to save/restore per pro <<
377 415
378 config ARC_DSP_HANDLED !! 416 config ALPHA_PYXIS
379 def_bool n !! 417 bool
>> 418 depends on ALPHA_MIATA || ALPHA_LX164 || ALPHA_SX164 || ALPHA_RUFFIAN
>> 419 default y
380 420
381 config ARC_DSP_SAVE_RESTORE_REGS !! 421 config ALPHA_EV6
382 def_bool n !! 422 bool
>> 423 depends on ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER || ALPHA_MARVEL
>> 424 default y
383 425
384 choice !! 426 config ALPHA_TSUNAMI
385 prompt "DSP support" !! 427 bool
386 default ARC_DSP_NONE !! 428 depends on ALPHA_SHARK || ALPHA_DP264 || ALPHA_EIGER
387 help !! 429 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 <<
425 430
426 config ARC_IRQ_NO_AUTOSAVE !! 431 config ALPHA_EV67
427 bool "Disable hardware autosave regfil !! 432 bool "EV67 (or later) CPU (speed > 600MHz)?" if ALPHA_DP264 || ALPHA_EIGER
428 default n !! 433 default y if ALPHA_NAUTILUS || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_SHARK || ALPHA_MARVEL
429 help 434 help
430 On HS cores, taken interrupt auto sa !! 435 Is this a machine based on the EV67 core? If in doubt, select N here
431 This is programmable and can be opti !! 436 and the machine will be treated as an EV6.
432 software INTERRUPT_PROLOGUE/EPILGUE <<
433 <<
434 config ARC_LPB_DISABLE <<
435 bool "Disable loop buffer (LPB)" <<
436 help <<
437 On HS cores, loop buffer (LPB) is pr <<
438 be optionally disabled. <<
439 <<
440 endif # ISA_ARCV2 <<
441 <<
442 endmenu # "ARC CPU Configuration" <<
443 <<
444 config LINUX_LINK_BASE <<
445 hex "Kernel link address" <<
446 default "0x80000000" <<
447 help <<
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 <<
458 config LINUX_RAM_BASE <<
459 hex "RAM base address" <<
460 default LINUX_LINK_BASE <<
461 help <<
462 By default Linux is linked at base o <<
463 cases (such as HSDK), Linux can't be <<
464 this option. <<
465 <<
466 config HIGHMEM <<
467 bool "High Memory Support" <<
468 select HAVE_ARCH_PFN_VALID <<
469 select KMAP_LOCAL <<
470 help <<
471 With ARC 2G:2G address split, only u <<
472 kernel. Enable this to potentially a <<
473 in future <<
474 <<
475 config ARC_HAS_PAE40 <<
476 bool "Support for the 40-bit Physical <<
477 depends on ISA_ARCV2 <<
478 select HIGHMEM <<
479 select PHYS_ADDR_T_64BIT <<
480 help <<
481 Enable access to physical memory bey <<
482 ARC cores with 40 bit Physical Addre <<
483 <<
484 config ARC_KVADDR_SIZE <<
485 int "Kernel Virtual Address Space size <<
486 range 0 512 <<
487 default "256" <<
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 <<
495 config ARC_CURR_IN_REG <<
496 bool "cache current task pointer in gp <<
497 default y <<
498 help <<
499 This reserves gp register to point t <<
500 kernel mode eliding memory access fo <<
501 <<
502 <<
503 config ARC_EMUL_UNALIGNED <<
504 bool "Emulate unaligned memory access <<
505 select SYSCTL_ARCH_UNALIGN_NO_WARN <<
506 select SYSCTL_ARCH_UNALIGN_ALLOW <<
507 depends on ISA_ARCOMPACT <<
508 help <<
509 This enables misaligned 16 & 32 bit <<
510 Use ONLY-IF-ABS-NECESSARY as it will <<
511 potential bugs in code <<
512 437
513 config HZ !! 438 config ALPHA_MCPCIA
514 int "Timer Frequency" !! 439 bool
515 default 100 !! 440 depends on ALPHA_RAWHIDE
>> 441 default y
516 442
517 config ARC_METAWARE_HLINK !! 443 config ALPHA_POLARIS
518 bool "Support for Metaware debugger as !! 444 bool
519 help !! 445 depends on ALPHA_RX164
520 This options allows a Linux userland !! 446 default y
521 host file system (open/creat/read/wr <<
522 Metaware Debugger. This can come in <<
523 when there is no real usable periphe <<
524 447
525 menuconfig ARC_DBG !! 448 config ALPHA_IRONGATE
526 bool "ARC debugging" !! 449 bool
>> 450 depends on ALPHA_NAUTILUS
527 default y 451 default y
528 452
529 if ARC_DBG !! 453 config GENERIC_HWEIGHT
>> 454 bool
>> 455 default y if !ALPHA_EV67
530 456
531 config ARC_DW2_UNWIND !! 457 config ALPHA_AVANTI
532 bool "Enable DWARF specific kernel sta !! 458 bool
>> 459 depends on ALPHA_XL || ALPHA_AVANTI_CH
533 default y 460 default y
534 select KALLSYMS <<
535 help 461 help
536 Compiles the kernel with DWARF unwin !! 462 Avanti AS 200, AS 205, AS 250, AS 255, AS 300, and AS 400-based
537 to get stack backtraces. !! 463 Alphas. Info at
>> 464 <http://www.unix-ag.org/Linux-Alpha/Architectures/Avanti.html>.
538 465
539 If you say Y here the resulting kern !! 466 config ALPHA_BROKEN_IRQ_MASK
540 but not slower, and it will give ver !! 467 bool
541 If you don't debug the kernel, you c !! 468 depends on ALPHA_GENERIC || ALPHA_PC164
542 to solve problems without frame unwi !! 469 default y
543 470
544 config ARC_DBG_JUMP_LABEL !! 471 config VGA_HOSE
545 bool "Paranoid checks in Static Keys ( !! 472 bool
546 depends on JUMP_LABEL !! 473 depends on VGA_CONSOLE && (ALPHA_GENERIC || ALPHA_TITAN || ALPHA_MARVEL || ALPHA_TSUNAMI)
547 default y if STATIC_KEYS_SELFTEST !! 474 default y
548 help 475 help
549 Enable paranoid checks and self-test !! 476 Support VGA on an arbitrary hose; needed for several platforms
550 part of static keys (jump labels) re !! 477 which always have multiple hoses, and whose consoles support it.
551 endif <<
552 478
553 config ARC_BUILTIN_DTB_NAME <<
554 string "Built in DTB" <<
555 help <<
556 Set the name of the DTB to embed in <<
557 Leaving it blank selects the "nsim_7 <<
558 479
559 endmenu # "ARC Architecture Configuration" !! 480 config ALPHA_QEMU
>> 481 bool "Run under QEMU emulation"
>> 482 depends on !ALPHA_GENERIC
>> 483 ---help---
>> 484 Assume the presence of special features supported by QEMU PALcode
>> 485 that reduce the overhead of system emulation.
>> 486
>> 487 Generic kernels will auto-detect QEMU. But when building a
>> 488 system-specific kernel, the assumption is that we want to
>> 489 eliminate as many runtime tests as possible.
>> 490
>> 491 If unsure, say N.
>> 492
>> 493
>> 494 config ALPHA_SRM
>> 495 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
>> 496 depends on TTY
>> 497 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
>> 498 ---help---
>> 499 There are two different types of booting firmware on Alphas: SRM,
>> 500 which is command line driven, and ARC, which uses menus and arrow
>> 501 keys. Details about the Linux/Alpha booting process are contained in
>> 502 the Linux/Alpha FAQ, accessible on the WWW from
>> 503 <http://www.alphalinux.org/>.
>> 504
>> 505 The usual way to load Linux on an Alpha machine is to use MILO
>> 506 (a bootloader that lets you pass command line parameters to the
>> 507 kernel just like lilo does for the x86 architecture) which can be
>> 508 loaded either from ARC or can be installed directly as a permanent
>> 509 firmware replacement from floppy (which requires changing a certain
>> 510 jumper on the motherboard). If you want to do either of these, say N
>> 511 here. If MILO doesn't work on your system (true for Jensen
>> 512 motherboards), you can bypass it altogether and boot Linux directly
>> 513 from an SRM console; say Y here in order to do that. Note that you
>> 514 won't be able to boot from an IDE disk using SRM.
>> 515
>> 516 If unsure, say N.
>> 517
>> 518 config ARCH_MAY_HAVE_PC_FDC
>> 519 def_bool y
>> 520
>> 521 config SMP
>> 522 bool "Symmetric multi-processing support"
>> 523 depends on ALPHA_SABLE || ALPHA_LYNX || ALPHA_RAWHIDE || ALPHA_DP264 || ALPHA_WILDFIRE || ALPHA_TITAN || ALPHA_GENERIC || ALPHA_SHARK || ALPHA_MARVEL
>> 524 ---help---
>> 525 This enables support for systems with more than one CPU. If you have
>> 526 a system with only one CPU, say N. If you have a system with more
>> 527 than one CPU, say Y.
>> 528
>> 529 If you say N here, the kernel will run on uni- and multiprocessor
>> 530 machines, but will use only one CPU of a multiprocessor machine. If
>> 531 you say Y here, the kernel will run on many, but not all,
>> 532 uniprocessor machines. On a uniprocessor machine, the kernel
>> 533 will run faster if you say N here.
560 534
561 config ARCH_FORCE_MAX_ORDER !! 535 See also the SMP-HOWTO available at
562 int "Maximum zone order" !! 536 <http://www.tldp.org/docs.html#howto>.
563 default "11" if ARC_HUGEPAGE_16M <<
564 default "10" <<
565 537
566 source "kernel/power/Kconfig" !! 538 If you don't know what to do here, say N.
>> 539
>> 540 config NR_CPUS
>> 541 int "Maximum number of CPUs (2-32)"
>> 542 range 2 32
>> 543 depends on SMP
>> 544 default "32" if ALPHA_GENERIC || ALPHA_MARVEL
>> 545 default "4" if !ALPHA_GENERIC && !ALPHA_MARVEL
>> 546 help
>> 547 MARVEL support can handle a maximum of 32 CPUs, all the others
>> 548 with working support have a maximum of 4 CPUs.
>> 549
>> 550 config ARCH_DISCONTIGMEM_ENABLE
>> 551 bool "Discontiguous Memory Support"
>> 552 help
>> 553 Say Y to support efficient handling of discontiguous physical memory,
>> 554 for architectures which are either NUMA (Non-Uniform Memory Access)
>> 555 or have huge holes in the physical address space for other reasons.
>> 556 See <file:Documentation/vm/numa.rst> for more.
>> 557
>> 558 config NUMA
>> 559 bool "NUMA Support (EXPERIMENTAL)"
>> 560 depends on DISCONTIGMEM && BROKEN
>> 561 help
>> 562 Say Y to compile the kernel to support NUMA (Non-Uniform Memory
>> 563 Access). This option is for configuring high-end multiprocessor
>> 564 server machines. If in doubt, say N.
>> 565
>> 566 config ALPHA_WTINT
>> 567 bool "Use WTINT" if ALPHA_SRM || ALPHA_GENERIC
>> 568 default y if ALPHA_QEMU
>> 569 default n if ALPHA_EV5 || ALPHA_EV56 || (ALPHA_EV4 && !ALPHA_LCA)
>> 570 default n if !ALPHA_SRM && !ALPHA_GENERIC
>> 571 default y if SMP
>> 572 ---help---
>> 573 The Wait for Interrupt (WTINT) PALcall attempts to place the CPU
>> 574 to sleep until the next interrupt. This may reduce the power
>> 575 consumed, and the heat produced by the computer. However, it has
>> 576 the side effect of making the cycle counter unreliable as a timing
>> 577 device across the sleep.
>> 578
>> 579 For emulation under QEMU, definitely say Y here, as we have other
>> 580 mechanisms for measuring time than the cycle counter.
>> 581
>> 582 For EV4 (but not LCA), EV5 and EV56 systems, or for systems running
>> 583 MILO, sleep mode is not supported so you might as well say N here.
>> 584
>> 585 For SMP systems we cannot use the cycle counter for timing anyway,
>> 586 so you might as well say Y here.
>> 587
>> 588 If unsure, say N.
>> 589
>> 590 config NODES_SHIFT
>> 591 int
>> 592 default "7"
>> 593 depends on NEED_MULTIPLE_NODES
>> 594
>> 595 # LARGE_VMALLOC is racy, if you *really* need it then fix it first
>> 596 config ALPHA_LARGE_VMALLOC
>> 597 bool
>> 598 ---help---
>> 599 Process creation and other aspects of virtual memory management can
>> 600 be streamlined if we restrict the kernel to one PGD for all vmalloc
>> 601 allocations. This equates to about 8GB.
>> 602
>> 603 Under normal circumstances, this is so far and above what is needed
>> 604 as to be laughable. However, there are certain applications (such
>> 605 as benchmark-grade in-kernel web serving) that can make use of as
>> 606 much vmalloc space as is available.
>> 607
>> 608 Say N unless you know you need gobs and gobs of vmalloc space.
>> 609
>> 610 config VERBOSE_MCHECK
>> 611 bool "Verbose Machine Checks"
>> 612
>> 613 config VERBOSE_MCHECK_ON
>> 614 int "Verbose Printing Mode (0=off, 1=on, 2=all)"
>> 615 depends on VERBOSE_MCHECK
>> 616 default 1
>> 617 ---help---
>> 618 This option allows the default printing mode to be set, and then
>> 619 possibly overridden by a boot command argument.
>> 620
>> 621 For example, if one wanted the option of printing verbose
>> 622 machine checks, but wanted the default to be as if verbose
>> 623 machine check printing was turned off, then one would choose
>> 624 the printing mode to be 0. Then, upon reboot, one could add
>> 625 the boot command line "verbose_mcheck=1" to get the normal
>> 626 verbose machine check printing, or "verbose_mcheck=2" to get
>> 627 the maximum information available.
>> 628
>> 629 Take the default (1) unless you want more control or more info.
>> 630
>> 631 choice
>> 632 prompt "Timer interrupt frequency (HZ)?"
>> 633 default HZ_128 if ALPHA_QEMU
>> 634 default HZ_1200 if ALPHA_RAWHIDE
>> 635 default HZ_1024
>> 636 ---help---
>> 637 The frequency at which timer interrupts occur. A high frequency
>> 638 minimizes latency, whereas a low frequency minimizes overhead of
>> 639 process accounting. The later effect is especially significant
>> 640 when being run under QEMU.
>> 641
>> 642 Note that some Alpha hardware cannot change the interrupt frequency
>> 643 of the timer. If unsure, say 1024 (or 1200 for Rawhide).
>> 644
>> 645 config HZ_32
>> 646 bool "32 Hz"
>> 647 config HZ_64
>> 648 bool "64 Hz"
>> 649 config HZ_128
>> 650 bool "128 Hz"
>> 651 config HZ_256
>> 652 bool "256 Hz"
>> 653 config HZ_1024
>> 654 bool "1024 Hz"
>> 655 config HZ_1200
>> 656 bool "1200 Hz"
>> 657 endchoice
>> 658
>> 659 config HZ
>> 660 int
>> 661 default 32 if HZ_32
>> 662 default 64 if HZ_64
>> 663 default 128 if HZ_128
>> 664 default 256 if HZ_256
>> 665 default 1200 if HZ_1200
>> 666 default 1024
>> 667
>> 668 config SRM_ENV
>> 669 tristate "SRM environment through procfs"
>> 670 depends on PROC_FS
>> 671 ---help---
>> 672 If you enable this option, a subdirectory inside /proc called
>> 673 /proc/srm_environment will give you access to the all important
>> 674 SRM environment variables (those which have a name) and also
>> 675 to all others (by their internal number).
>> 676
>> 677 SRM is something like a BIOS for Alpha machines. There are some
>> 678 other such BIOSes, like AlphaBIOS, which this driver cannot
>> 679 support (hey, that's not SRM!).
>> 680
>> 681 Despite the fact that this driver doesn't work on all Alphas (but
>> 682 only on those which have SRM as their firmware), it's save to
>> 683 build it even if your particular machine doesn't know about SRM
>> 684 (or if you intend to compile a generic kernel). It will simply
>> 685 not create those subdirectory in /proc (and give you some warning,
>> 686 of course).
>> 687
>> 688 This driver is also available as a module and will be called
>> 689 srm_env then.
>> 690
>> 691 endmenu
>> 692
>> 693 # DUMMY_CONSOLE may be defined in drivers/video/console/Kconfig
>> 694 # but we also need it if VGA_HOSE is set
>> 695 config DUMMY_CONSOLE
>> 696 bool
>> 697 depends on VGA_HOSE
>> 698 default y
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