# # NOTES -- Lines that can be cut/pasted into kernel and hints configs. # # This file contains machine dependent kernel configuration notes. For # machine independent notes, look in /sys/conf/NOTES. # # $FreeBSD$ # # # This directive is mandatory; it defines the architecture to be # configured for; in this case, the 386 family based IBM-PC and # compatibles. # machine amd64 cpu HAMMER # # We want LINT to cover profiling as well profile 2 # Debug options options NPX_DEBUG # enable npx debugging (FPU/math emu) #new math emulator # # PERFMON causes the driver for Pentium/Pentium Pro performance counters # to be compiled. See perfmon(4) for more information. # options PERFMON ##################################################################### # NETWORKING OPTIONS # # DEVICE_POLLING adds support for mixed interrupt-polling handling # of network device drivers, which has significant benefits in terms # of robustness to overloads and responsivity, as well as permitting # accurate scheduling of the CPU time between kernel network processing # and other activities. The drawback is a moderate (up to 1/HZ seconds) # potential increase in response times. # It is strongly recommended to use HZ=1000 or 2000 with DEVICE_POLLING # to achieve smoother behaviour. # Additionally, you can enable/disable polling at runtime with the # sysctl variable kern.polling.enable (defaults off), and select # the CPU fraction reserved to userland with the sysctl variable # kern.polling.user_frac (default 50, range 0..100). # # Only the "dc" "fxp" and "sis" devices support this mode of operation at # the time of this writing. options DEVICE_POLLING ##################################################################### # CLOCK OPTIONS # The following options are used for debugging clock behavior only, and # should not be used for production systems. # # CLK_CALIBRATION_LOOP will run the clock calibration loop at startup # until the user presses a key. options CLK_CALIBRATION_LOOP ##################################################################### # MISCELLANEOUS DEVICES AND OPTIONS hint.speaker.0.at="isa" hint.speaker.0.port="0x61" device gzip #Exec gzipped a.out's. REQUIRES COMPAT_AOUT! device apm_saver # Requires APM ##################################################################### # HARDWARE BUS CONFIGURATION # # ISA bus # device isa # # Options for `isa': # # AUTO_EOI_1 enables the `automatic EOI' feature for the master 8259A # interrupt controller. This saves about 0.7-1.25 usec for each interrupt. # This option breaks suspend/resume on some portables. # # AUTO_EOI_2 enables the `automatic EOI' feature for the slave 8259A # interrupt controller. This saves about 0.7-1.25 usec for each interrupt. # Automatic EOI is documented not to work for for the slave with the # original i8259A, but it works for some clones and some integrated # versions. # # MAXMEM specifies the amount of RAM on the machine; if this is not # specified, FreeBSD will first read the amount of memory from the CMOS # RAM, so the amount of memory will initially be limited to 64MB or 16MB # depending on the BIOS. If the BIOS reports 64MB, a memory probe will # then attempt to detect the installed amount of RAM. If this probe # fails to detect >64MB RAM you will have to use the MAXMEM option. # The amount is in kilobytes, so for a machine with 128MB of RAM, it would # be 131072 (128 * 1024). # # BROKEN_KEYBOARD_RESET disables the use of the keyboard controller to # reset the CPU for reboot. This is needed on some systems with broken # keyboard controllers. options MAXMEM=(128*1024) #options BROKEN_KEYBOARD_RESET # # PCI bus & PCI options: # device pci # # AGP GART support device agp ##################################################################### # HARDWARE DEVICE CONFIGURATION # # Mandatory devices: # # # Optional devices: # # # ACPI support using the Intel ACPI Component Architecture reference # implementation. # # ACPI_DEBUG enables the use of the debug.acpi.level and debug.acpi.layer # kernel environment variables to select initial debugging levels for the # Intel ACPICA code. (Note that the Intel code must also have USE_DEBUGGER # defined when it is built). # # Note that building ACPI into the kernel is deprecated; the module is # normally loaded automatically by the loader. # device acpi options ACPI_DEBUG # DRM options: # mgadrm: AGP Matrox G200, G400, G450, G550 # tdfxdrm: 3dfx Voodoo 3/4/5 and Banshee # r128drm: ATI Rage 128 # radeondrm: ATI Radeon up to 9000/9100 # DRM_DEBUG: include debug printfs, very slow # # mga requires AGP in the kernel, and it is recommended # for AGP r128 and radeon cards. device mgadrm device "r128drm" device radeondrm device tdfxdrm options DRM_DEBUG # M-systems DiskOnchip products see src/sys/contrib/dev/fla/README ###device fla ###hint.fla.0.at="isa" # # Network interfaces: # # ed: Western Digital and SMC 80xx; Novell NE1000 and NE2000; 3Com 3C503 # HP PC Lan+, various PC Card devices (refer to etc/defauls/pccard.conf) # (requires miibus) # ie: AT&T StarLAN 10 and EN100; 3Com 3C507; unknown NI5210; # Intel EtherExpress # lnc: Lance/PCnet cards (Isolan, Novell NE2100, NE32-VL, AMD Am7990 and # Am79C960) # sr: RISCom/N2 hdlc sync 1/2 port V.35/X.21 serial driver (requires sppp) # wl: Lucent Wavelan (ISA card only). # Order for ISA/EISA devices is important here device ed #options ED_NO_MIIBUS # Disable ed miibus support hint.ed.0.at="isa" hint.ed.0.port="0x280" hint.ed.0.irq="5" hint.ed.0.maddr="0xd8000" device lnc hint.lnc.0.at="isa" hint.lnc.0.port="0x280" hint.lnc.0.irq="10" hint.lnc.0.drq="0" device sr hint.sr.0.at="isa" hint.sr.0.port="0x300" hint.sr.0.irq="5" hint.sr.0.maddr="0xd0000" device wl hint.wl.0.at="isa" hint.wl.0.port="0x300" options WLCACHE # enables the signal-strength cache options WLDEBUG # enables verbose debugging output # # ATA raid adapters # device pst # # SCSI host adapters: # # ncv: NCR 53C500 based SCSI host adapters. # nsp: Workbit Ninja SCSI-3 based PC Card SCSI host adapters. # stg: TMC 18C30, 18C50 based SCSI host adapters. device ncv device nsp device stg hint.stg.0.at="isa" hint.stg.0.port="0x140" hint.stg.0.port="11" # # Adaptec FSA RAID controllers, including integrated DELL controllers, # the Dell PERC 2/QC and the HP NetRAID-4M device aac device aacp # SCSI Passthrough interface (optional, CAM required) # # IBM (now Adaptec) ServeRAID controllers device ips # # SafeNet crypto driver: can be moved to the MI NOTES as soon as # it's tested on a big-endian machine # device safe # SafeNet 1141 options SAFE_DEBUG # enable debugging support: hw.safe.debug options SAFE_RNDTEST # enable rndtest support ##################################################################### # # Miscellaneous hardware: # # dgb: Digiboard PC/Xi and PC/Xe series driver (ALPHA QUALITY!) # digi: Digiboard driver # gsc: Genius GS-4500 hand scanner. # spic: Sony Programmable I/O controller (VAIO notebooks) # stl: Stallion EasyIO and EasyConnection 8/32 (cd1400 based) # stli: Stallion EasyConnection 8/64, ONboard, Brumby (intelligent) # Notes on the Specialix SI/XIO driver: # The host card is memory, not IO mapped. # The Rev 1 host cards use a 64K chunk, on a 32K boundary. # The Rev 2 host cards use a 32K chunk, on a 32K boundary. # The cards can use an IRQ of 11, 12 or 15. # Notes on the Digiboard PC/Xi and PC/Xe series driver # # The NDGBPORTS option specifies the number of ports controlled by the # dgb(4) driver. The default value is 16 ports per device. # # The following flag values have special meanings in dgb: # 0x01 - alternate layout of pins # 0x02 - use the windowed PC/Xe in 64K mode device digi hint.digi.0.at="isa" hint.digi.0.port="0x104" hint.digi.0.maddr="0xd0000" # BIOS & FEP/OS components of device digi. device digi_CX device digi_CX_PCI device digi_EPCX device digi_EPCX_PCI device digi_Xe device digi_Xem device digi_Xr # HOT1 Xilinx 6200 card (http://www.vcc.com/) device xrpu # # Laptop/Notebook options: # # See also: # apm under `Miscellaneous hardware' # above. # PCI bus Cards: # -------------- # # Cyclades Cyclom-Y PCI serial driver device cy options CY_PCI_FASTINTR # Use with cy_pci unless irq is shared #hint.cy.0.at="isa" #hint.cy.0.irq="10" #hint.cy.0.maddr="0xd4000" #hint.cy.0.msize="0x2000" # # 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 # # Change the size of the kernel virtual address space. Due to # constraints in loader(8) on i386, this must be a multiple of 4. # 256 = 1 GB of kernel address space. Increasing this also causes # a reduction of the address space in user processes. 512 splits # the 4GB cpu address space in half (2GB user, 2GB kernel). # options KVA_PAGES=260 ##################################################################### # ABI Emulation # Enable Linux ABI emulation #options COMPAT_LINUX # Enable the linux-like proc filesystem support (requires COMPAT_LINUX # and PSEUDOFS) #options LINPROCFS ##################################################################### # VM OPTIONS # Disable the 4 MByte page PSE CPU feature. The PSE feature allows the # kernel to use a 4 MByte pages to map the kernel instead of 4k pages. # This saves on the amount of memory needed for page tables needed to # map the kernel. You should only disable this feature as a temporary # workaround if you are having problems with it enabled. # #options DISABLE_PSE # Disable the global pages PGE CPU feature. The PGE feature allows pages # to be marked with the PG_G bit. TLB entries for these pages are not # flushed from the cache when %cr3 is reloaded. This can make context # switches less expensive. You should only disable this feature as a # temporary workaround if you are having problems with it enabled. # #options DISABLE_PG_G # 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 ENABLE_ALART 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