2 # Copyright (c) 2006 Ondrej Palkovsky
3 # Copyright (c) 2009 Martin Decky
6 # Redistribution and use in source and binary forms, with or without
7 # modification, are permitted provided that the following conditions
10 # - Redistributions of source code must retain the above copyright
11 # notice, this list of conditions and the following disclaimer.
12 # - Redistributions in binary form must reproduce the above copyright
13 # notice, this list of conditions and the following disclaimer in the
14 # documentation and/or other materials provided with the distribution.
15 # - The name of the author may not be used to endorse or promote products
16 # derived from this software without specific prior written permission.
18 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 ## General platform options
33 @ "abs32le" abstract 32-bit little endian
34 @ "amd64" AMD64/EM64T 64-bit (PC)
36 @ "ia32" IA-32 32-bit (PC)
38 @ "mips32" MIPS 32-bit
39 @ "ppc32" PowerPC 32-bit
40 @ "riscv64" RISC-V 64-bit
41 @ "sparc64" SPARCv9 64-bit
46 @ "bmalta" MIPS Malta Development Board big endian
47 @ "lmalta" MIPS Malta Development Board little endian
48 ! [PLATFORM=mips32] MACHINE (choice)
51 @ "i460GX" i460GX chipset machine
52 @ "ski" Ski ia64 simulator
53 ! [PLATFORM=ia64] MACHINE (choice)
56 @ "generic" Generic Sun workstation or server
57 ! [PLATFORM=sparc64] MACHINE (choice)
60 @ "gta02" GTA02 / Neo FreeRunner
61 @ "integratorcp" Integratorcp
62 @ "beagleboardxm" BeagleBoard-xM
63 @ "beaglebone" BeagleBone
64 @ "raspberrypi" Raspberry Pi
65 ! [PLATFORM=arm32] MACHINE (choice)
68 @ "pentium4" Pentium 4
69 @ "pentium3" Pentium 3
70 @ "core" Core Solo/Duo
71 @ "athlon_xp" Athlon XP
72 @ "athlon_mp" Athlon MP
74 ! [PLATFORM=ia32] PROCESSOR (choice)
78 ! [PLATFORM=amd64] PROCESSOR (choice)
81 @ "us" UltraSPARC I-II subarchitecture
82 @ "us3" UltraSPARC III-IV subarchitecture
83 @ "sun4v" Niagara (sun4v)
84 ! [PLATFORM=sparc64&MACHINE=generic] PROCESSOR (choice)
87 @ "cortex_a8" ARM Cortex A-8
88 ! [PLATFORM=arm32&(MACHINE=beagleboardxm|MACHINE=beaglebone)] PROCESSOR (choice)
92 ! [PLATFORM=arm32&MACHINE=gta02] PROCESSOR (choice)
95 @ "arm926ej_s" ARM926EJ-S
96 ! [PLATFORM=arm32&MACHINE=integratorcp] PROCESSOR (choice)
100 ! [PLATFORM=arm32&MACHINE=raspberrypi] PROCESSOR (choice)
102 # Add more ARMv4 CPUs
105 ! [PLATFORM=arm32&(PROCESSOR=arm920t)] PROCESSOR_ARCH (choice)
107 # Add more ARMv5 CPUs
110 ! [PLATFORM=arm32&(PROCESSOR=arm926ej_s)] PROCESSOR_ARCH (choice)
112 # Add more ARMv6 CPUs
115 ! [PLATFORM=arm32&(PROCESSOR=arm1176)] PROCESSOR_ARCH (choice)
117 # Add more ARMv7-A CPUs
120 ! [PLATFORM=arm32&(PROCESSOR=cortex_a8)] PROCESSOR_ARCH (choice)
124 ! [PLATFORM=mips32&MACHINE=msim] PROCESSOR (choice)
128 ! [PLATFORM=mips32&(MACHINE=bmalta|MACHINE=lmalta)] PROCESSOR (choice)
130 % Kernel memory model
133 ! [PLATFORM=amd64] MEMORY_MODEL (choice)
136 @ "tmpfs" TMPFS image
138 @ "ext4fs" ext4 image
142 ## Mapping between platform and kernel architecture
144 % Kernel architecture
146 ! [PLATFORM=abs32le] KARCH (choice)
148 % Kernel architecture
150 ! [PLATFORM=amd64] KARCH (choice)
152 % Kernel architecture
154 ! [PLATFORM=arm32] KARCH (choice)
156 % Kernel architecture
158 ! [PLATFORM=ia32] KARCH (choice)
160 % Kernel architecture
162 ! [PLATFORM=ia32xen] KARCH (choice)
164 % Kernel architecture
166 ! [PLATFORM=ia64] KARCH (choice)
168 % Kernel architecture
170 ! [PLATFORM=mips32] KARCH (choice)
172 % Kernel architecture
174 ! [PLATFORM=ppc32] KARCH (choice)
176 % Kernel architecture
178 ! [PLATFORM=ppc64] KARCH (choice)
180 % Kernel architecture
182 ! [PLATFORM=riscv64] KARCH (choice)
184 % Kernel architecture
186 ! [PLATFORM=sparc64] KARCH (choice)
189 ## Mapping between platform and user space architecture
191 % User space architecture
193 ! [PLATFORM=abs32le] UARCH (choice)
195 % User space architecture
197 ! [PLATFORM=amd64] UARCH (choice)
199 % User space architecture
201 ! [PLATFORM=arm32] UARCH (choice)
203 % User space architecture
205 ! [PLATFORM=ia32|PLATFORM=ia32xen] UARCH (choice)
207 % User space architecture
209 ! [PLATFORM=ia64] UARCH (choice)
211 % User space architecture
213 ! [PLATFORM=mips32&(MACHINE=msim|MACHINE=lmalta)] UARCH (choice)
215 % User space architecture
217 ! [PLATFORM=mips32&MACHINE=bmalta] UARCH (choice)
219 % User space architecture
221 ! [PLATFORM=ppc32] UARCH (choice)
223 % User space architecture
225 ! [PLATFORM=ppc64] UARCH (choice)
227 % User space architecture
229 ! [PLATFORM=riscv64] UARCH (choice)
231 % User space architecture
233 ! [PLATFORM=sparc64] UARCH (choice)
236 ## Mapping between platform and boot architecture
240 ! [PLATFORM=abs32le] BARCH (choice)
244 ! [PLATFORM=amd64] BARCH (choice)
248 ! [PLATFORM=arm32] BARCH (choice)
252 ! [PLATFORM=ia32] BARCH (choice)
256 ! [PLATFORM=ia32xen] BARCH (choice)
260 ! [PLATFORM=ia64] BARCH (choice)
264 ! [PLATFORM=mips32] BARCH (choice)
268 ! [PLATFORM=ppc32] BARCH (choice)
272 ! [PLATFORM=ppc64] BARCH (choice)
276 ! [PLATFORM=riscv64] BARCH (choice)
280 ! [PLATFORM=sparc64] BARCH (choice)
283 ## Mapping between platform and image format
287 ! [PLATFORM=mips32&MACHINE=msim] IMAGE (choice)
291 ! [PLATFORM=mips32&(MACHINE=bmalta|MACHINE=lmalta)] IMAGE (choice)
297 @ "gcc_cross" GNU C Compiler (cross-compiler)
299 @ "gcc_helenos" GNU C Compiler (experimental HelenOS-specific cross-compiler)
300 @ "gcc_native" GNU C Compiler (native)
303 % Clang Integrated Assembler
304 @ "default" Use architecture default.
305 @ "yes" Use integrated assembler.
306 @ "no" Use GNU Assembler.
307 ! [COMPILER=clang] INTEGRATED_AS (choice)
309 ## Cross-compiler target for abstract architecture
311 % Cross-compiler target
314 @ "mips32" MIPS 32-bit
315 ! [PLATFORM=abs32le&(COMPILER=gcc_cross|COMPILER=gcc_helenos)] CROSS_TARGET (choice)
318 ## Kernel configuration
321 ! [PLATFORM=ia32&(PROCESSOR=athlon_xp|PROCESSOR=athlon_mp|PROCESSOR=pentium3)] CONFIG_FENCES_P3 (y)
324 ! [PLATFORM=ia32&(PROCESSOR=pentium4|PROCESSOR=core)] CONFIG_FENCES_P4 (y)
327 ! [PLATFORM=amd64] CONFIG_FENCES_P4 (y)
329 % IOMAP bitmap support
330 ! [PLATFORM=ia32|PLATFORM=amd64] CONFIG_IOMAP_BITMAP (y)
332 % IOMAP dummy support
333 ! [PLATFORM=abs32le|PLATFORM=arm32|PLATFORM=mips32|PLATFORM=ppc32|PLATFORM=riscv64|PLATFORM=sparc64] CONFIG_IOMAP_DUMMY (y)
336 ! [PLATFORM=ia32|PLATFORM=amd64] CONFIG_ACPI (y)
338 % Hierarchical page tables support
339 ! [PLATFORM=abs32le|PLATFORM=ia32|PLATFORM=amd64|PLATFORM=arm32|PLATFORM=mips32|PLATFORM=ppc32|PLATFORM=riscv64] CONFIG_PAGE_PT (y)
341 % Page hash table support
342 ! [PLATFORM=ia64|PLATFORM=sparc64] CONFIG_PAGE_HT (y)
344 % Software integer division support
345 ! [PLATFORM=abs32le|PLATFORM=ia32|PLATFORM=arm32|PLATFORM=ia64|PLATFORM=mips32|PLATFORM=ppc32] CONFIG_SOFTINT (y)
348 ! [PLATFORM=ia64|PLATFORM=mips32|PLATFORM=ppc32|PLATFORM=sparc64] CONFIG_ASID (y)
351 ! [PLATFORM=ia64|PLATFORM=mips32|PLATFORM=ppc32|PLATFORM=sparc64] CONFIG_ASID_FIFO (y)
353 % OpenFirmware tree support
354 ! [PLATFORM=ppc32|PLATFORM=sparc64] CONFIG_OFW_TREE (y)
356 % OpenFirmware PCI bus support
357 ! [PLATFORM=sparc64] CONFIG_OFW_PCI (y)
359 % Multiboot standard support
360 ! [PLATFORM=ia32|PLATFORM=amd64] CONFIG_MULTIBOOT (y)
363 ! [PLATFORM=ia32|PLATFORM=amd64|PLATFORM=ia64|PLATFORM=ppc32|PLATFORM=sparc64] CONFIG_FPU (y)
365 ## ARMv7 made FPU hardware compulsory
367 ! [PLATFORM=arm32&PROCESSOR_ARCH=armv7_a] CONFIG_FPU (y)
370 ! [PLATFORM=arm32&MACHINE=integratorcp] CONFIG_FPU (y)
373 ## Kernel features options
376 ! [(PLATFORM=ia32&PROCESSOR!=athlon_xp)|PLATFORM=amd64|PLATFORM=sparc64|PLATFORM=ia64|(PLATFORM=mips32&MACHINE=msim)|PLATFORM=abs32le] CONFIG_SMP (y/n)
381 % Deadlock detection support for spinlocks
382 ! [CONFIG_DEBUG=y&CONFIG_SMP=y] CONFIG_DEBUG_SPINLOCK (y/n)
384 % Lazy FPU context switching
385 ! [CONFIG_FPU=y] CONFIG_FPU_LAZY (y/n)
388 ! [PLATFORM=ia64] CONFIG_VHPT (n/y)
391 ! [PLATFORM=sparc64] CONFIG_TSB (y/n)
393 % IO SAPIC on default address support
394 ! [PLATFORM=ia64&MACHINE!=ski] CONFIG_IOSAPIC (y/n)
396 % Virtually indexed D-cache support
397 ! [PLATFORM=sparc64] CONFIG_VIRT_IDX_DCACHE (y/n)
400 ! [PROCESSOR=sun4v&CONFIG_SMP=y] CONFIG_SIMICS_SMP_HACK (n/y)
402 % Support for userspace debuggers
403 ! CONFIG_UDEBUG (y/n)
405 % Kernel console support
406 ! CONFIG_KCONSOLE (y/n)
408 % Kernel symbol information
409 ! CONFIG_SYMTAB (y/n)
411 % Detailed kernel logging
414 % Kernel function tracing
417 % Compile kernel tests
420 % Use link-time optimization
421 ! [COMPILER=gcc_cross|COMPILER=gcc_native] CONFIG_LTO (n/y)
423 % Kernel RCU algorithm
424 @ "PREEMPT_PODZIMEK" Preemptible Podzimek-RCU
425 @ "PREEMPT_A" Preemptible A-RCU
429 ## User space features options
431 % Light weight futex locks
432 ! FUTEX_UPGRADABLE (n/y)
438 @ "generic" Keyboard or serial line
439 ! [PLATFORM=arm32&MACHINE=integratorcp] CONFIG_HID_IN (choice)
442 @ "generic" Keyboard or serial line
443 @ "none" No input device
444 ! [PLATFORM=ia32|PLATFORM=amd64|PLATFORM=mips32|PLATFORM=ppc32|PLATFORM=riscv64|PLATFORM=sparc64] CONFIG_HID_IN (choice)
447 @ "generic" Keyboard or serial line
448 @ "keyboard" Keyboard
449 @ "serial" Serial line
450 @ "none" No input device
451 ! [PLATFORM=ia64&MACHINE=i460GX] CONFIG_HID_IN (choice)
453 % Output device class
454 @ "generic" Monitor or serial line
455 ! [PLATFORM=arm32&(MACHINE=gta02|MACHINE=integratorcp|MACHINE=beagleboardxm|MACHINE=beaglebone|MACHINE=raspberrypi)] CONFIG_HID_OUT (choice)
457 % Output device class
458 @ "generic" Monitor or serial line
459 @ "none" No output device
460 ! [PLATFORM=ia32|PLATFORM=amd64|PLATFORM=sparc64|PLATFORM=ppc32|(PLATFORM=ia64&MACHINE=i460GX)|(PLATFORM=mips32&(MACHINE=msim|MACHINE=bmalta|MACHINE=lmalta))|PLATFORM=riscv64] CONFIG_HID_OUT (choice)
462 % PC keyboard support
463 ! [(CONFIG_HID_IN=generic|CONFIG_HID_IN=keyboard)&(PLATFORM=ia32|PLATFORM=amd64)] CONFIG_PC_KBD (y/n)
465 % PC keyboard support
466 ! [(CONFIG_HID_IN=generic|CONFIG_HID_IN=keyboard)&PLATFORM=ia64&MACHINE=i460GX] CONFIG_PC_KBD (y/n)
468 % PC keyboard support
469 ! [(CONFIG_HID_IN=generic|CONFIG_HID_IN=keyboard)&PLATFORM=arm32&MACHINE=integratorcp] CONFIG_AT_KBD (y/n)
471 % Support for msim keyboard
472 ! [CONFIG_HID_IN=generic&MACHINE=msim] CONFIG_MSIM_KBD (y/n)
474 % Support for msim printer
475 ! [(CONFIG_HID_OUT=generic|CONFIG_HID_OUT=serial)&MACHINE=msim] CONFIG_MSIM_PRN (y/n)
477 % Support for VIA CUDA controller
478 ! [CONFIG_HID_IN=generic&PLATFORM=ppc32] CONFIG_VIA_CUDA (y/n)
480 % Support for NS16550 controller
481 ! [(CONFIG_HID_IN=generic|CONFIG_HID_IN=keyboard)&PLATFORM=sparc64&MACHINE=generic] CONFIG_NS16550 (y/n)
483 % Support for NS16550 controller
484 ! [(CONFIG_HID_IN=generic|CONFIG_HID_IN=serial)&PLATFORM=ia64&MACHINE=i460GX] CONFIG_NS16550 (y/n)
486 % Support for PL011 UART
487 ! [(CONFIG_HID_OUT=generic|CONFIG_HID_OUT=serial)&PLATFORM=arm32&(MACHINE=integratorcp|MACHINE=raspberrypi)] CONFIG_PL011_UART (y/n)
489 % Support for NS16550 controller (kernel console)
490 ! [(CONFIG_HID_IN=generic|CONFIG_HID_IN=serial|CONFIG_HID_OUT=generic|CONFIG_HID_OUT=serial)&(PLATFORM=ia32|PLATFORM=amd64)] CONFIG_NS16550_KCON (n/y)
492 % Use NS16550 controller as serial input (kernel console)
493 ! [(CONFIG_HID_IN=generic|CONFIG_HID_IN=serial)&(PLATFORM=ia32|PLATFORM=amd64)&CONFIG_NS16550_KCON=y] CONFIG_NS16550 (y)
495 % Use NS16550 controller as dummy serial output (kernel console)
496 ! [(CONFIG_HID_OUT=generic|CONFIG_HID_OUT=serial)&(PLATFORM=ia32|PLATFORM=amd64)&CONFIG_NS16550_KCON=y] CONFIG_NS16550_OUT (y)
498 % Support for Samsung S3C24XX on-chip UART
499 ! [(CONFIG_HID_OUT=generic|CONFIG_HID_OUT=serial)&PLATFORM=arm32&MACHINE=gta02] CONFIG_S3C24XX_UART (y/n)
501 % Support for Samsung S3C24XX on-chip interrupt controller
502 ! [PLATFORM=arm32&MACHINE=gta02] CONFIG_S3C24XX_IRQC (y)
504 % Support for TI AM335x timers support
505 ! [PLATFORM=arm32&MACHINE=beaglebone] CONFIG_AM335X_TIMERS (y)
507 % Support for OMAP on-chip UART
508 ! [(CONFIG_HID_OUT=generic|CONFIG_HID_OUT=serial)&PLATFORM=arm32&(MACHINE=beagleboardxm|MACHINE=beaglebone)] CONFIG_OMAP_UART (y/n)
510 % Support for BCM2835 mailbox
511 ! [PLATFORM=arm32&MACHINE=raspberrypi] CONFIG_BCM2835_MAILBOX (y/n)
513 % Support for i8042 controller
514 ! [CONFIG_PC_KBD=y] CONFIG_I8042 (y)
516 % Support for pl050 controller
517 ! [CONFIG_HID_IN=generic&PLATFORM=arm32&MACHINE=integratorcp] CONFIG_PL050 (y)
519 % Sun keyboard support
520 ! [(CONFIG_HID_IN=generic|CONFIG_HID_IN=keyboard)&PLATFORM=sparc64&MACHINE=generic&CONFIG_NS16550=y] CONFIG_SUN_KBD (y)
522 % Macintosh ADB keyboard support
523 ! [(CONFIG_HID_IN=generic|CONFIG_HID_IN=keyboard)&PLATFORM=ppc32&(CONFIG_VIA_CUDA=y)] CONFIG_MAC_KBD (y)
525 % Dummy serial line input
526 ! [CONFIG_MSIM_KBD=y|CONFIG_ARM_KBD=y] CONFIG_DSRLNIN (y)
528 % Dummy serial line output
529 ! [CONFIG_MSIM_PRN=y|CONFIG_ARM_PRN=y] CONFIG_DSRLNOUT (y)
531 % Serial line input module
532 ! [CONFIG_DSRLNIN=y|(PLATFORM=arm32&MACHINE=gta02)|(PLATFORM=arm32&MACHINE=integratorcp&CONFIG_PL011_UART=y)|(PLATFORM=arm32&MACHINE=beaglebone&CONFIG_OMAP_UART=y)|(PLATFORM=arm32&MACHINE=beagleboardxm&CONFIG_OMAP_UART=y)|(PLATFORM=ia64&MACHINE=i460GX&CONFIG_NS16550=y)|(PLATFORM=ia64&MACHINE=ski)|(PLATFORM=sparc64&PROCESSOR=sun4v)|(PLATFORM=arm32&MACHINE=raspberrypi&CONFIG_PL011_UART=y)|(PLATFORM=ia32&CONFIG_NS16550=y)|(PLATFORM=amd64&CONFIG_NS16550=y)] CONFIG_SRLN (y)
535 ! [CONFIG_HID_OUT=generic&(PLATFORM=ia32|PLATFORM=amd64)] CONFIG_EGA (y/n)
538 ! [CONFIG_HID_OUT=generic&PLATFORM=ia64&MACHINE=i460GX] CONFIG_EGA (y/n)
540 % Framebuffer support
541 ! [CONFIG_HID_OUT=generic&(PLATFORM=ia32|PLATFORM=amd64|PLATFORM=ppc32)] CONFIG_FB (y/n)
543 % Framebuffer support
544 ! [(CONFIG_HID_OUT=generic|CONFIG_HID_OUT=monitor)&PLATFORM=arm32] CONFIG_FB (y/n)
546 % Framebuffer support
547 ! [(CONFIG_HID_OUT=generic|CONFIG_HID_OUT=monitor)&PLATFORM=sparc64&MACHINE=generic] CONFIG_FB (y/n)
549 % Default framebuffer mode
565 ! [(PLATFORM=ia32|PLATFORM=amd64|MACHINE=beagleboardxm)&CONFIG_HID_OUT!=none&CONFIG_FB=y] CONFIG_BFB_MODE (choice)
567 % Default framebuffer depth
572 ! [(PLATFORM=ia32|PLATFORM=amd64|MACHINE=beagleboardxm)&CONFIG_HID_OUT!=none&CONFIG_FB=y] CONFIG_BFB_BPP (choice)
574 % Start AP processors by the loader
575 ! [PLATFORM=sparc64&CONFIG_SMP=y] CONFIG_AP (y/n)
577 % Dynamic linking support
578 ! [PLATFORM=ia32] CONFIG_RTLD (n/y)
579 ! [PLATFORM=abs32le|PLATFORM=amd64|PLATFORM=arm32|PLATFORM=ia64|PLATFORM=mips32|PLATFORM=ppc32|PLATFORM=riscv64|PLATFORM=sparc64] CONFIG_RTLD (n)
581 % Build shared libraries
582 ! [CONFIG_RTLD=y] CONFIG_BUILD_SHARED_LIBS (n/y)
583 ! [CONFIG_RTLD=n] CONFIG_BUILD_SHARED_LIBS (n)
585 % Link against shared libraries
586 ! [CONFIG_BUILD_SHARED_LIBS=y] CONFIG_USE_SHARED_LIBS (n/y)
587 ! [CONFIG_BUILD_SHARED_LIBS=n] CONFIG_USE_SHARED_LIBS (n)
589 % Launch (devman) test drivers
590 ! [CONFIG_DEBUG=y] CONFIG_TEST_DRIVERS (n/y)
593 ! CONFIG_WRITE_CORE_FILES (n/y)
595 % Include userspace unit tests (PCUT)
596 ! CONFIG_PCUT_TESTS (n/y)
598 % Include PCUT self-tests
599 ! CONFIG_PCUT_SELF_TESTS (n/y)
601 % Include development files (headers, libraries)
602 ! CONFIG_DEVEL_FILES (n/y)
605 ! CONFIG_STRIP_BINARIES (n/y)
607 % Strip revision information (helpful when comparing outputs)
608 ! CONFIG_STRIP_REVISION_INFO (n/y)
611 @ "3" Level 3 (recommended).
614 @ "0" Disable optimizations.
615 @ "s" Optimize for size.
616 @ "g" Enable only optimizations that don't harm debugging.
617 @ "fast" Level 3 + aggressive optimizations that can affect adherence to standards.
618 ! OPTIMIZATION (choice)
620 % Barebone build with essential binaries only
621 ! CONFIG_BAREBONE (n/y)
623 % Line debugging information
624 ! [CONFIG_STRIP_BINARIES!=y] CONFIG_LINE_DEBUG (n/y)
628 % Start virtual USB host controller
629 ! CONFIG_RUN_VIRTUAL_USB_HC (n/y)
631 % OHCI root hub port power switching
632 @ "no" All root hub ports are always powered.
633 @ "ganged" Root hub ports are all powered or all off.
634 @ "per_port" Powered status of every root hub port is independent.
635 ! [PLATFORM=ia32|PLATFORM=amd64|PLATFORM=ppc32] OHCI_POWER_SWITCH (choice)
637 % GRUB boot loader architecture
639 @ "efi" GRUB for UEFI
640 ! [PLATFORM=ia32|PLATFORM=amd64] GRUB_ARCH (choice)
643 @ "2" NetBSD stage 2 boot loader
644 ! [PLATFORM=arm32&(MACHINE=beagleboardxm|MACHINE=beaglebone)] UIMAGE_OS (choice)
648 ! [PLATFORM=arm32&MACHINE!=beagleboardxm&MACHINE!=beaglebone] UIMAGE_OS (choice)