sgiioc4: always init hwif->io_ports

[linux-2.6-omap-h63xx.git] / Documentation / kernel-parameters.txt

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 0a3fed445249f84b8e42c9f904d0e0df16a75d42..65de5ba7b74c8323e5c9ff6482db28617fb6593d 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -34,6 +34,7 @@ parameter is applicable:
        ALSA    ALSA sound support is enabled.
        APIC    APIC support is enabled.
        APM     Advanced Power Management support is enabled.
        ALSA    ALSA sound support is enabled.
        APIC    APIC support is enabled.
        APM     Advanced Power Management support is enabled.

+       AVR32   AVR32 architecture is enabled.

        AX25    Appropriate AX.25 support is enabled.
        BLACKFIN Blackfin architecture is enabled.
        DRM     Direct Rendering Management support is enabled.
        AX25    Appropriate AX.25 support is enabled.
        BLACKFIN Blackfin architecture is enabled.
        DRM     Direct Rendering Management support is enabled.


@@ -222,9 +223,6 @@ and is between 256 and 4096 characters. It is defined in the file
                        Warning: Many of these options can produce a lot of
                        output and make your system unusable. Be very careful.
 
                        Warning: Many of these options can produce a lot of
                        output and make your system unusable. Be very careful.
 

-
-       acpi_fake_ecdt  [HW,ACPI] Workaround failure due to BIOS lacking ECDT
-

        acpi_pm_good    [X86-32,X86-64]
                        Override the pmtimer bug detection: force the kernel
                        to assume that this machine's pmtimer latches its value
        acpi_pm_good    [X86-32,X86-64]
                        Override the pmtimer bug detection: force the kernel
                        to assume that this machine's pmtimer latches its value


@@ -297,9 +295,6 @@ and is between 256 and 4096 characters. It is defined in the file
        apm=            [APM] Advanced Power Management
                        See header of arch/i386/kernel/apm.c.
 
        apm=            [APM] Advanced Power Management
                        See header of arch/i386/kernel/apm.c.
 

-       applicom=       [HW]
-                       Format: <mem>,<irq>
-

        arcrimi=        [HW,NET] ARCnet - "RIM I" (entirely mem-mapped) cards
                        Format: <io>,<irq>,<nodeID>
 
        arcrimi=        [HW,NET] ARCnet - "RIM I" (entirely mem-mapped) cards
                        Format: <io>,<irq>,<nodeID>
 


@@ -345,12 +340,6 @@ and is between 256 and 4096 characters. It is defined in the file
                        Format: <io>,<irq>,<mode>
                        See header of drivers/net/hamradio/baycom_ser_hdx.c.
 
                        Format: <io>,<irq>,<mode>
                        See header of drivers/net/hamradio/baycom_ser_hdx.c.
 

-       blkmtd_device=  [HW,MTD]
-       blkmtd_erasesz=
-       blkmtd_ro=
-       blkmtd_bs=
-       blkmtd_count=
-

        boot_delay=     Milliseconds to delay each printk during boot.
                        Values larger than 10 seconds (10000) are changed to
                        no delay (0).
        boot_delay=     Milliseconds to delay each printk during boot.
                        Values larger than 10 seconds (10000) are changed to
                        no delay (0).


@@ -431,8 +420,11 @@ and is between 256 and 4096 characters. It is defined in the file
                        over the 8254 in addition to over the IO-APIC. The
                        kernel tries to set a sensible default.
 
                        over the 8254 in addition to over the IO-APIC. The
                        kernel tries to set a sensible default.
 

-       hpet=           [X86-32,HPET] option to disable HPET and use PIT.
-                       Format: disable
+       hpet=           [X86-32,HPET] option to control HPET usage
+                       Format: { enable (default) | disable | force }
+                       disable: disable HPET and use PIT instead
+                       force: allow force enabled of undocumented chips (ICH4,
+                       VIA, nVidia)

 
        com20020=       [HW,NET] ARCnet - COM20020 chipset
                        Format:
 
        com20020=       [HW,NET] ARCnet - COM20020 chipset
                        Format:


@@ -513,8 +505,6 @@ and is between 256 and 4096 characters. It is defined in the file
        cs89x0_media=   [HW,NET]
                        Format: { rj45 | aui | bnc }
 
        cs89x0_media=   [HW,NET]
                        Format: { rj45 | aui | bnc }
 

-       cyclades=       [HW,SERIAL] Cyclades multi-serial port adapter.
-

        dasd=           [HW,NET]
                        See header of drivers/s390/block/dasd_devmap.c.
 
        dasd=           [HW,NET]
                        See header of drivers/s390/block/dasd_devmap.c.
 


@@ -538,29 +528,30 @@ and is between 256 and 4096 characters. It is defined in the file
                        Format: <area>[,<node>]
                        See also Documentation/networking/decnet.txt.
 
                        Format: <area>[,<node>]
                        See also Documentation/networking/decnet.txt.
 

-       default_blu=    [VT]
+       vt.default_blu= [VT]

                        Format: <blue0>,<blue1>,<blue2>,...,<blue15>
                        Change the default blue palette of the console.
                        This is a 16-member array composed of values
                        ranging from 0-255.
 
                        Format: <blue0>,<blue1>,<blue2>,...,<blue15>
                        Change the default blue palette of the console.
                        This is a 16-member array composed of values
                        ranging from 0-255.
 

-       default_grn=    [VT]
+       vt.default_grn= [VT]

                        Format: <green0>,<green1>,<green2>,...,<green15>
                        Change the default green palette of the console.
                        This is a 16-member array composed of values
                        ranging from 0-255.
 
                        Format: <green0>,<green1>,<green2>,...,<green15>
                        Change the default green palette of the console.
                        This is a 16-member array composed of values
                        ranging from 0-255.
 

-       default_red=    [VT]
+       vt.default_red= [VT]

                        Format: <red0>,<red1>,<red2>,...,<red15>
                        Change the default red palette of the console.
                        This is a 16-member array composed of values
                        ranging from 0-255.
 
                        Format: <red0>,<red1>,<red2>,...,<red15>
                        Change the default red palette of the console.
                        This is a 16-member array composed of values
                        ranging from 0-255.
 

-       default_utf8=   [VT]
+       vt.default_utf8=
+                       [VT]

                        Format=<0|1>
                        Set system-wide default UTF-8 mode for all tty's.
                        Format=<0|1>
                        Set system-wide default UTF-8 mode for all tty's.

-                       Default is 0 and by setting to 1, it enables UTF-8
-                       mode for all newly opened or allocated terminals.
+                       Default is 1, i.e. UTF-8 mode is enabled for all
+                       newly opened terminals.

 
        dhash_entries=  [KNL]
                        Set number of hash buckets for dentry cache.
 
        dhash_entries=  [KNL]
                        Set number of hash buckets for dentry cache.


@@ -572,10 +563,6 @@ and is between 256 and 4096 characters. It is defined in the file
                        See drivers/char/README.epca and
                        Documentation/digiepca.txt.
 
                        See drivers/char/README.epca and
                        Documentation/digiepca.txt.
 

-       dmascc=         [HW,AX25,SERIAL] AX.25 Z80SCC driver with DMA
-                       support available.
-                       Format: <io_dev0>[,<io_dev1>[,..<io_dev32>]]
-

        dmasound=       [HW,OSS] Sound subsystem buffers
 
        dscc4.setup=    [NET]
        dmasound=       [HW,OSS] Sound subsystem buffers
 
        dscc4.setup=    [NET]


@@ -601,22 +588,10 @@ and is between 256 and 4096 characters. It is defined in the file
 
        eata=           [HW,SCSI]
 
 
        eata=           [HW,SCSI]
 

-       ec_intr=        [HW,ACPI] ACPI Embedded Controller interrupt mode
-                       Format: <int>
-                       0: polling mode
-                       non-0: interrupt mode (default)
-
-       eda=            [HW,PS2]
-
-       edb=            [HW,PS2]
-

        edd=            [EDD]
                        Format: {"of[f]" | "sk[ipmbr]"}
                        See comment in arch/i386/boot/edd.S
 
        edd=            [EDD]
                        Format: {"of[f]" | "sk[ipmbr]"}
                        See comment in arch/i386/boot/edd.S
 

-       eicon=          [HW,ISDN]
-                       Format: <id>,<membase>,<irq>
-

        eisa_irq_edge=  [PARISC,HW]
                        See header of drivers/parisc/eisa.c.
 
        eisa_irq_edge=  [PARISC,HW]
                        See header of drivers/parisc/eisa.c.
 


@@ -795,6 +770,23 @@ and is between 256 and 4096 characters. It is defined in the file
 
        inttest=        [IA64]
 
 
        inttest=        [IA64]
 

+       intel_iommu=    [DMAR] Intel IOMMU driver (DMAR) option
+               off
+                       Disable intel iommu driver.
+               igfx_off [Default Off]
+                       By default, gfx is mapped as normal device. If a gfx
+                       device has a dedicated DMAR unit, the DMAR unit is
+                       bypassed by not enabling DMAR with this option. In
+                       this case, gfx device will use physical address for
+                       DMA.
+               forcedac [x86_64]
+                       With this option iommu will not optimize to look
+                       for io virtual address below 32 bit forcing dual
+                       address cycle on pci bus for cards supporting greater
+                       than 32 bit addressing. The default is to look
+                       for translation below 32 bit and if not available
+                       then look in the higher range.
+

        io7=            [HW] IO7 for Marvel based alpha systems
                        See comment before marvel_specify_io7 in
                        arch/alpha/kernel/core_marvel.c.
        io7=            [HW] IO7 for Marvel based alpha systems
                        See comment before marvel_specify_io7 in
                        arch/alpha/kernel/core_marvel.c.


@@ -892,8 +884,13 @@ and is between 256 and 4096 characters. It is defined in the file
        lapic_timer_c2_ok       [X86-32,x86-64,APIC] trust the local apic timer in
                        C2 power state.
 
        lapic_timer_c2_ok       [X86-32,x86-64,APIC] trust the local apic timer in
                        C2 power state.
 

-       lasi=           [HW,SCSI] PARISC LASI driver for the 53c700 chip
-                       Format: addr:<io>,irq:<irq>
+       libata.dma=     [LIBATA] DMA control
+                       libata.dma=0      Disable all PATA and SATA DMA
+                       libata.dma=1      PATA and SATA Disk DMA only
+                       libata.dma=2      ATAPI (CDROM) DMA only
+                       libata.dma=4      Compact Flash DMA only 
+                       Combinations also work, so libata.dma=3 enables DMA
+                       for disks and CDROMs, but not CFs.

 
        libata.noacpi   [LIBATA] Disables use of ACPI in libata suspend/resume
                        when set.
 
        libata.noacpi   [LIBATA] Disables use of ACPI in libata suspend/resume
                        when set.


@@ -1127,6 +1124,10 @@ and is between 256 and 4096 characters. It is defined in the file
                        of returning the full 64-bit number.
                        The default is to return 64-bit inode numbers.
 
                        of returning the full 64-bit number.
                        The default is to return 64-bit inode numbers.
 

+       nmi_debug=      [KNL,AVR32] Specify one or more actions to take
+                       when a NMI is triggered.
+                       Format: [state][,regs][,debounce][,die]
+

        nmi_watchdog=   [KNL,BUGS=X86-32] Debugging features for SMP kernels
 
        no387           [BUGS=X86-32] Tells the kernel to use the 387 maths
        nmi_watchdog=   [KNL,BUGS=X86-32] Debugging features for SMP kernels
 
        no387           [BUGS=X86-32] Tells the kernel to use the 387 maths


@@ -1142,9 +1143,6 @@ and is between 256 and 4096 characters. It is defined in the file
        noapic          [SMP,APIC] Tells the kernel to not make use of any
                        IOAPICs that may be present in the system.
 
        noapic          [SMP,APIC] Tells the kernel to not make use of any
                        IOAPICs that may be present in the system.
 

-       noasync         [HW,M68K] Disables async and sync negotiation for
-                       all devices.
-

        nobats          [PPC] Do not use BATs for mapping kernel lowmem
                        on "Classic" PPC cores.
 
        nobats          [PPC] Do not use BATs for mapping kernel lowmem
                        on "Classic" PPC cores.
 


@@ -1455,7 +1453,9 @@ and is between 256 and 4096 characters. It is defined in the file
                        Param: "schedule" - profile schedule points.
                        Param: <number> - step/bucket size as a power of 2 for
                                statistical time based profiling.
                        Param: "schedule" - profile schedule points.
                        Param: <number> - step/bucket size as a power of 2 for
                                statistical time based profiling.

-                       Param: "sleep" - profile D-state sleeping (millisecs)
+                       Param: "sleep" - profile D-state sleeping (millisecs).
+                               Requires CONFIG_SCHEDSTATS
+                       Param: "kvm" - profile VM exits.

 
        processor.max_cstate=   [HW,ACPI]
                        Limit processor to maximum C-state
 
        processor.max_cstate=   [HW,ACPI]
                        Limit processor to maximum C-state


@@ -1582,9 +1582,6 @@ and is between 256 and 4096 characters. It is defined in the file
        sa1100ir        [NET]
                        See drivers/net/irda/sa1100_ir.c.
 
        sa1100ir        [NET]
                        See drivers/net/irda/sa1100_ir.c.
 

-       sb=             [HW,OSS]
-                       Format: <io>,<irq>,<dma>,<dma2>
-

        sbni=           [NET] Granch SBNI12 leased line adapter
 
        sc1200wdt=      [HW,WDT] SC1200 WDT (watchdog) driver
        sbni=           [NET] Granch SBNI12 leased line adapter
 
        sc1200wdt=      [HW,WDT] SC1200 WDT (watchdog) driver


@@ -1601,7 +1598,13 @@ and is between 256 and 4096 characters. It is defined in the file
                        Format: <vendor>:<model>:<flags>
                        (flags are integer value)
 
                        Format: <vendor>:<model>:<flags>
                        (flags are integer value)
 

-       scsi_logging=   [SCSI]
+       scsi_logging_level=     [SCSI] a bit mask of logging levels
+                       See drivers/scsi/scsi_logging.h for bits.  Also
+                       settable via sysctl at dev.scsi.logging_level
+                       (/proc/sys/dev/scsi/logging_level).
+                       There is also a nice 'scsi_logging_level' script in the
+                       S390-tools package, available for download at
+                       http://www-128.ibm.com/developerworks/linux/linux390/s390-tools-1.5.4.html

 
        scsi_mod.scan=  [SCSI] sync (default) scans SCSI busses as they are
                        discovered.  async scans them in kernel threads,
 
        scsi_mod.scan=  [SCSI] sync (default) scans SCSI busses as they are
                        discovered.  async scans them in kernel threads,


@@ -1628,8 +1631,6 @@ and is between 256 and 4096 characters. It is defined in the file
 
        serialnumber    [BUGS=X86-32]
 
 
        serialnumber    [BUGS=X86-32]
 

-       sg_def_reserved_size=   [SCSI]
-

        shapers=        [NET]
                        Maximal number of shapers.
 
        shapers=        [NET]
                        Maximal number of shapers.
 


@@ -2020,10 +2021,6 @@ and is between 256 and 4096 characters. It is defined in the file
        norandmaps      Don't use address space randomization
                        Equivalent to echo 0 > /proc/sys/kernel/randomize_va_space
 
        norandmaps      Don't use address space randomization
                        Equivalent to echo 0 > /proc/sys/kernel/randomize_va_space
 

-       unwind_debug=N  N > 0 will enable dwarf2 unwinder debugging
-                       This is useful to get more information why
-                       you got a "dwarf2 unwinder stuck"
-

 ______________________________________________________________________
 
 TODO:
 ______________________________________________________________________
 
 TODO: