fda9ad60e4
commen about this in every NOTES file which lists DEVICE_POLLING. PR: 46793 MFC: 1 day
543 lines
16 KiB
Plaintext
543 lines
16 KiB
Plaintext
#
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# NOTES -- Lines that can be cut/pasted into kernel and hints configs.
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#
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# This file contains machine dependent kernel configuration notes. For
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# machine independent notes, look in /sys/conf/NOTES.
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#
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# $FreeBSD$
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#
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#
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# This directive is mandatory; it defines the architecture to be
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# configured for; in this case, the AMD64 family based machines.
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#
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machine amd64
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#
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# We want LINT to cover profiling as well.
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#XXX#profile 2
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#####################################################################
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# SMP OPTIONS:
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#
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# The apic device enables the use of the I/O APIC for interrupt delivery.
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# The apic device can be used in both UP and SMP kernels, but is required
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# for SMP kernels. Thus, the apic device is not strictly an SMP option,
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# but it is a prerequisite for SMP.
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#
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# Notes:
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#
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# By default, mixed mode is used to route IRQ0 from the AT timer via
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# the 8259A master PIC through the ExtINT pin on the first I/O APIC.
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# This can be disabled via the NO_MIXED_MODE option. In that case,
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# IRQ0 will be routed via an intpin on the first I/O APIC. Not all
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# motherboards hook IRQ0 up to the first I/O APIC even though their
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# MP table or MADT may claim to do so. That is why mixed mode is
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# enabled by default.
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#
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# Optional:
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device atpic # Optional legacy pic support
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device mptable # Optional MPSPEC mptable support
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options NO_MIXED_MODE # Disable use of mixed mode
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#####################################################################
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# CPU OPTIONS
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#
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# You must specify at least one CPU (the one you intend to run on);
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# deleting the specification for CPUs you don't need to use may make
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# parts of the system run faster.
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#
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cpu HAMMER # aka K8, aka Opteron & Athlon64
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#
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# Options for CPU features.
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#
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#
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# PERFMON causes the driver for Pentium/Pentium Pro performance counters
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# to be compiled. See perfmon(4) for more information.
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#
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#XXX#options PERFMON
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#####################################################################
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# NETWORKING OPTIONS
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#
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# DEVICE_POLLING adds support for mixed interrupt-polling handling
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# of network device drivers, which has significant benefits in terms
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# of robustness to overloads and responsivity, as well as permitting
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# accurate scheduling of the CPU time between kernel network processing
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# and other activities. The drawback is a moderate (up to 1/HZ seconds)
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# potential increase in response times.
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# DEVICE_POLLING does not work with SMP.
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# It is strongly recommended to use HZ=1000 or 2000 with DEVICE_POLLING
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# to achieve smoother behaviour.
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# Additionally, you can enable/disable polling at runtime with the
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# sysctl variable kern.polling.enable (defaults off), and select
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# the CPU fraction reserved to userland with the sysctl variable
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# kern.polling.user_frac (default 50, range 0..100).
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#
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# Not all device drivers support this mode of operation at the time of
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# this writing. See polling(4) for more details.
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options DEVICE_POLLING
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#####################################################################
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# CLOCK OPTIONS
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# The following options are used for debugging clock behavior only, and
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# should not be used for production systems.
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# CLK_CALIBRATION_LOOP causes clock calibration to be run in a loop at
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# startup until the user presses a key. (The i8254 clock is always
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# calibrated relative to the RTC (mc146818a) and this option causes the
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# calibration to be repeated.)
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options CLK_CALIBRATION_LOOP
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# CLK_USE_I8254_CALIBRATION causes the calibrated frequency of the i8254
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# clock to actually be used.
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options CLK_USE_I8254_CALIBRATION
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#####################################################################
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# MISCELLANEOUS DEVICES AND OPTIONS
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device gzip #Exec gzipped a.out's. REQUIRES COMPAT_AOUT!
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#####################################################################
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# HARDWARE BUS CONFIGURATION
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#
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# ISA bus
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#
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device isa
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#
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# Options for `isa':
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#
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# AUTO_EOI_1 enables the `automatic EOI' feature for the master 8259A
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# interrupt controller. This saves about 0.7-1.25 usec for each interrupt.
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# This option breaks suspend/resume on some portables.
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#
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# AUTO_EOI_2 enables the `automatic EOI' feature for the slave 8259A
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# interrupt controller. This saves about 0.7-1.25 usec for each interrupt.
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# Automatic EOI is documented not to work for for the slave with the
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# original i8259A, but it works for some clones and some integrated
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# versions.
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#
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# MAXMEM specifies the amount of RAM on the machine; if this is not
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# specified, FreeBSD will first read the amount of memory from the CMOS
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# RAM, so the amount of memory will initially be limited to 64MB or 16MB
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# depending on the BIOS. If the BIOS reports 64MB, a memory probe will
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# then attempt to detect the installed amount of RAM. If this probe
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# fails to detect >64MB RAM you will have to use the MAXMEM option.
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# The amount is in kilobytes, so for a machine with 128MB of RAM, it would
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# be 131072 (128 * 1024).
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#
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# BROKEN_KEYBOARD_RESET disables the use of the keyboard controller to
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# reset the CPU for reboot. This is needed on some systems with broken
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# keyboard controllers.
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options AUTO_EOI_1
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#options AUTO_EOI_2
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options MAXMEM=(128*1024)
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#options BROKEN_KEYBOARD_RESET
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#
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# PCI bus & PCI options:
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#
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device pci
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#
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# AGP GART support
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device agp
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#####################################################################
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# HARDWARE DEVICE CONFIGURATION
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#
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# Optional devices:
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#
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# 3Dfx Voodoo Graphics, Voodoo II /dev/3dfx CDEV support. This will create
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# the /dev/3dfx0 device to work with glide implementations. This should get
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# linked to /dev/3dfx and /dev/voodoo. Note that this is not the same as
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# the tdfx DRI module from XFree86 and is completely unrelated.
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#
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# To enable Linuxulator support, one must also include COMPAT_LINUX in the
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# config as well, or you will not have the dependencies. The other option
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# is to load both as modules.
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device tdfx # Enable 3Dfx Voodoo support
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#XXX#options TDFX_LINUX # Enable Linuxulator support
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#
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# ACPI support using the Intel ACPI Component Architecture reference
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# implementation.
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#
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# ACPI_DEBUG enables the use of the debug.acpi.level and debug.acpi.layer
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# kernel environment variables to select initial debugging levels for the
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# Intel ACPICA code. (Note that the Intel code must also have USE_DEBUGGER
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# defined when it is built).
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#
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# ACPI_MAX_THREADS sets the number of task threads started.
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#
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# ACPI_NO_SEMAPHORES makes the AcpiOs*Semaphore routines a no-op.
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#
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# ACPICA_PEDANTIC enables strict checking of AML. Our default is to
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# relax these checks to allow code generated by the Microsoft compiler
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# to still execute.
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#
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# Note that building ACPI into the kernel is deprecated; the module is
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# normally loaded automatically by the loader.
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device acpi
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options ACPI_DEBUG
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options ACPI_MAX_THREADS=1
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#!options ACPI_NO_SEMAPHORES
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#!options ACPICA_PEDANTIC
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# Support for ACPI CPU Performance states via cpufreq(4)
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device acpi_perf
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# DRM options:
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# mgadrm: AGP Matrox G200, G400, G450, G550
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# r128drm: ATI Rage 128
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# radeondrm: ATI Radeon up to 9000/9100
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# sisdrm: SiS 300/305,540,630
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# tdfxdrm: 3dfx Voodoo 3/4/5 and Banshee
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# DRM_DEBUG: include debug printfs, very slow
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#
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# mga requires AGP in the kernel, and it is recommended
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# for AGP r128 and radeon cards.
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device mgadrm
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device r128drm
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device radeondrm
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device sisdrm
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device tdfxdrm
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options DRM_DEBUG
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#
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# Network interfaces:
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#
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# ath: Atheros a/b/g WiFi adapters (requires ath_hal and wlan)
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# ed: Western Digital and SMC 80xx; Novell NE1000 and NE2000; 3Com 3C503
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# HP PC Lan+, various PC Card devices (refer to etc/defaults/pccard.conf)
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# (requires miibus)
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# lnc: Lance/PCnet cards (Isolan, Novell NE2100, NE32-VL, AMD Am7990 and
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# Am79C960)
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#XXX# still calls MD i386 kvtop function instead of vtophys etc
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#XXX#device ed
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#XXX#device lnc
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#XXX#device ath
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#XXX#device ath_hal # Atheros HAL (includes binary component)
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device wlan # 802.11 layer
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#
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# ATA raid adapters
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#
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#XXX this stores pointers in a 32bit field that is defined by the hardware
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#device pst
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#
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# 3ware 9000 series PATA/SATA RAID controller driver and options.
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# The driver is implemented as a SIM, and so, needs the CAM infrastructure.
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#
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options TWA_DEBUG # 0-10; 10 prints the most messages.
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options TWA_FLASH_FIRMWARE # firmware image bundled when defined.
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device twa # 3ware 9000 series PATA/SATA RAID
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#
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# SCSI host adapters:
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#
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# ncv: NCR 53C500 based SCSI host adapters.
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# nsp: Workbit Ninja SCSI-3 based PC Card SCSI host adapters.
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# stg: TMC 18C30, 18C50 based SCSI host adapters.
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device ncv
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device nsp
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device stg
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#
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# Adaptec FSA RAID controllers, including integrated DELL controllers,
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# the Dell PERC 2/QC and the HP NetRAID-4M
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device aac
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device aacp # SCSI Passthrough interface (optional, CAM required)
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#
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# IBM (now Adaptec) ServeRAID controllers
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device ips
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#
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# SafeNet crypto driver: can be moved to the MI NOTES as soon as
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# it's tested on a big-endian machine
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#
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device safe # SafeNet 1141
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options SAFE_DEBUG # enable debugging support: hw.safe.debug
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options SAFE_RNDTEST # enable rndtest support
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#####################################################################
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#
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# Miscellaneous hardware:
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#
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# cy: Cyclades serial driver
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# digi: Digiboard driver
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# Notes on the Specialix SI/XIO driver:
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# The host card is memory, not IO mapped.
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# The Rev 1 host cards use a 64K chunk, on a 32K boundary.
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# The Rev 2 host cards use a 32K chunk, on a 32K boundary.
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# The cards can use an IRQ of 11, 12 or 15.
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device cy
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options CY_PCI_FASTINTR # Use with cy_pci unless irq is shared
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device digi
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# BIOS & FEP/OS components of device digi.
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device digi_CX
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device digi_CX_PCI
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device digi_EPCX
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device digi_EPCX_PCI
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device digi_Xe
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device digi_Xem
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device digi_Xr
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# sx device is i386 and pc98 only at the moment.
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device sx
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options SX_DEBUG
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# HOT1 Xilinx 6200 card (http://www.vcc.com/)
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device xrpu
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#
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# Laptop/Notebook options:
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#
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#
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# I2C Bus
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#
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#---------------------------------------------------------------------------
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# ISDN4BSD
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#
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# See /usr/share/examples/isdn/ROADMAP for an introduction to isdn4bsd.
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#
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# i4b passive ISDN cards support contains the following hardware drivers:
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#
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# isic - Siemens/Infineon ISDN ISAC/HSCX/IPAC chipset driver
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# iwic - Winbond W6692 PCI bus ISDN S/T interface controller
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# ifpi - AVM Fritz!Card PCI driver
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# ifpi2 - AVM Fritz!Card PCI version 2 driver
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# itjc - Siemens ISAC / TJNet Tiger300/320 chipset
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#
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# i4b active ISDN cards support contains the following hardware drivers:
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#
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# iavc - AVM B1 PCI, AVM B1 ISA, AVM T1
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#
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# Note that the ``options'' (if given) and ``device'' lines must BOTH
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# be uncommented to enable support for a given card !
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#
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# In addition to a hardware driver (and probably an option) the mandatory
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# ISDN protocol stack devices and the mandatory support device must be
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# enabled as well as one or more devices from the optional devices section.
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#
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#---------------------------------------------------------------------------
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# isic driver (Siemens/Infineon chipsets)
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#
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#XXX#device isic
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#
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# PCI bus Cards:
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# --------------
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#
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# ELSA MicroLink ISDN/PCI (same as ELSA QuickStep 1000pro PCI)
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options ELSA_QS1PCI
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#
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#---------------------------------------------------------------------------
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# ifpi2 driver for AVM Fritz!Card PCI version 2
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#
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# AVM Fritz!Card PCI version 2
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#XXX#device ifpi2
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#
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#---------------------------------------------------------------------------
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# iwic driver for Winbond W6692 chipset
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#
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# ASUSCOM P-IN100-ST-D (and other Winbond W6692 based cards)
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#XXX#device iwic
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#
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#---------------------------------------------------------------------------
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# itjc driver for Siemens ISAC / TJNet Tiger300/320 chipset
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#
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# Traverse Technologies NETjet-S
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# Teles PCI-TJ
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#XXX#device itjc
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#
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#---------------------------------------------------------------------------
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# iavc driver (AVM active cards, needs i4bcapi driver!)
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#
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#XXX#device iavc
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#
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#---------------------------------------------------------------------------
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# ISDN Protocol Stack - mandatory for all hardware drivers
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#
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# Q.921 / layer 2 - i4b passive cards D channel handling
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#XXX#device i4bq921
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#
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# Q.931 / layer 3 - i4b passive cards D channel handling
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#XXX#device i4bq931
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#
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# layer 4 - i4b common passive and active card handling
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#XXX#device i4b
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#
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#---------------------------------------------------------------------------
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# ISDN devices - mandatory for all hardware drivers
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#
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# userland driver to do ISDN tracing (for passive cards only)
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#XXX#device i4btrc
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#XXX#options NI4BTRC=4
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#
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# userland driver to control the whole thing
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#XXX#device i4bctl
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#
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#---------------------------------------------------------------------------
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# ISDN devices - optional
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#
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# userland driver for access to raw B channel
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#XXX#device i4brbch
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#XXX#options NI4BRBCH=4
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#
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# userland driver for telephony
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#XXX#device i4btel
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#XXX#options NI4BTEL=2
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#
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# network driver for IP over raw HDLC ISDN
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#XXX#device i4bipr
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#XXX#options NI4BIPR=4
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# enable VJ header compression detection for ipr i/f
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options IPR_VJ
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# enable logging of the first n IP packets to isdnd (n=32 here)
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||
options IPR_LOG=32
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||
#
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# network driver for sync PPP over ISDN; requires an equivalent
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# number of sppp device to be configured
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#XXX#device i4bisppp
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#XXX#options NI4BISPPP=4
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||
#
|
||
# B-channel interface to the netgraph subsystem
|
||
#XXX#device i4bing
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||
#XXX#options NI4BING=2
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||
#
|
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# CAPI driver needed for active ISDN cards (see iavc driver above)
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#XXX#device i4bcapi
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#
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#---------------------------------------------------------------------------
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||
|
||
#
|
||
# System Management Bus (SMB)
|
||
#
|
||
options ENABLE_ALART # Control alarm on Intel intpm driver
|
||
|
||
#
|
||
# Set the number of PV entries per process. Increasing this can
|
||
# stop panics related to heavy use of shared memory. However, that can
|
||
# (combined with large amounts of physical memory) cause panics at
|
||
# boot time due the kernel running out of VM space.
|
||
#
|
||
# If you're tweaking this, you might also want to increase the sysctls
|
||
# "vm.v_free_min", "vm.v_free_reserved", and "vm.v_free_target".
|
||
#
|
||
# The value below is the one more than the default.
|
||
#
|
||
options PMAP_SHPGPERPROC=201
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||
|
||
|
||
#####################################################################
|
||
# ABI Emulation
|
||
|
||
#XXX keep these here for now and reactivate when support for emulating
|
||
#XXX these 32 bit binaries is added.
|
||
|
||
# Enable 32-bit runtime support for FreeBSD/i386 binaries.
|
||
options COMPAT_IA32
|
||
|
||
# Enable iBCS2 runtime support for SCO and ISC binaries
|
||
#XXX#options IBCS2
|
||
|
||
# Emulate spx device for client side of SVR3 local X interface
|
||
#XXX#options SPX_HACK
|
||
|
||
# Enable Linux ABI emulation
|
||
#XXX#options COMPAT_LINUX
|
||
|
||
# Enable 32-bit Linux ABI emulation (requires COMPAT_43 and COMPAT_IA32)
|
||
options COMPAT_LINUX32
|
||
|
||
# Enable the linux-like proc filesystem support (requires COMPAT_LINUX32
|
||
# and PSEUDOFS)
|
||
options LINPROCFS
|
||
|
||
#
|
||
# SysVR4 ABI emulation
|
||
#
|
||
# The svr4 ABI emulator can be statically compiled into the kernel or loaded as
|
||
# a KLD module.
|
||
# The STREAMS network emulation code can also be compiled statically or as a
|
||
# module. If loaded as a module, it must be loaded before the svr4 module
|
||
# (the /usr/sbin/svr4 script does this for you). If compiling statically,
|
||
# the `streams' device must be configured into any kernel which also
|
||
# specifies COMPAT_SVR4. It is possible to have a statically-configured
|
||
# STREAMS device and a dynamically loadable svr4 emulator; the /usr/sbin/svr4
|
||
# script understands that it doesn't need to load the `streams' module under
|
||
# those circumstances.
|
||
# Caveat: At this time, `options KTRACE' is required for the svr4 emulator
|
||
# (whether static or dynamic).
|
||
#
|
||
#XXX#options COMPAT_SVR4 # build emulator statically
|
||
#XXX#options DEBUG_SVR4 # enable verbose debugging
|
||
#XXX#device streams # STREAMS network driver (required for svr4).
|
||
|
||
|
||
#####################################################################
|
||
# VM OPTIONS
|
||
|
||
# KSTACK_PAGES is the number of memory pages to assign to the kernel
|
||
# stack of each thread.
|
||
|
||
options KSTACK_PAGES=3
|
||
|
||
#####################################################################
|
||
|
||
# More undocumented options for linting.
|
||
# Note that documenting these are not considered an affront.
|
||
|
||
options FB_INSTALL_CDEV # install a CDEV entry in /dev
|
||
|
||
options KBDIO_DEBUG=2
|
||
options KBD_MAXRETRY=4
|
||
options KBD_MAXWAIT=6
|
||
options KBD_RESETDELAY=201
|
||
|
||
options PSM_DEBUG=1
|
||
|
||
options TIMER_FREQ=((14318182+6)/12)
|
||
|
||
options VM_KMEM_SIZE
|
||
options VM_KMEM_SIZE_MAX
|
||
options VM_KMEM_SIZE_SCALE
|
||
|
||
|
||
# The I/O device
|
||
device io
|