128 lines
5.2 KiB
Plaintext
128 lines
5.2 KiB
Plaintext
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Here is a list of hp300 specific kernel compilation options and what they
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mean:
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HAVEVAC
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Compiles in support for virtually addressed cache (VAC) found on
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hp320 and 350 machines. Should only be defined when HP320 and/or
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HP350 is.
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HP320
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Support for old hp320 machines: 16mhz 68020, HP MMU, 16mhz 68881
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and VAC. Compiles in support for a VAC, HP MMU, and the 98620A
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16-bit DMA channel. Forces the definition of HAVEVAC.
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HP350
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Support for old hp350 machines: 25mhz 68020, HP MMU, 20mhz 68881
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and VAC. Compiles in support for a VAC and the HP MMU. Differs
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from HP320 in that it has no support for 16-bit DMA controller.
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Forces the definition of HAVEVAC.
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HP330
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Support for old hp330 (and 318/319) machines: 16mhz 68020, 68551 PMMU
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and 16mhz 68881. Compiles in support for PMMU.
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HP360
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Support for old hp360 (and 340) machines: 25mhz 68030+MMU and 25mhz
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68882. Compiles in support for PMMU and 68030. Differs from HP330
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in support for 68030 on-chip data cache.
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HP370
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Support for old hp370 (and current 345/375/400) machines: 33 (50) mhz
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68030+MMU and 33 (50) mhz 68882. Compiles in support for PMMU, 68030
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and off-chip physically addressed cache. Differs from 360 in only one
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place, in dealing with flushing the external cache.
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HP380
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Support for "current" hp380/425 (and 433) machines: 25 (33) mhz 68040
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with MMU/FPU. Compiles in support for 68040.
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HPFPLIB
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Compiles in support to link with HP-UX's version of Motorola's 68040
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FP emulation library (hp300/hpux_float.o). Kernel will build and run
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without this option, but many binaries will core dump. Should not be
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defined unless HP380 is.
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USELEDS
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Twinkle the hp4xx front panel (or hp3xx internal) LEDs in the HP
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designated way. Somewhat frivolous, but the heartbeat LED is
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useful to see if your machine is alive.
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PANICBUTTON
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Compiles in code which will enable a "force-crash" HIL keyboard
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sequence. When the Reset key is typed twice in succession (within
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half a second) the kernel will panic. Note that the HIL Reset key
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sends a NMI to the processor which will get the CPUs attention no
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matter what it is doing (i.e. as long as it isn't halted). Alas,
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also note that the NMI is only sent when the keyboard is in "cooked"
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(ITE) mode. If it is in "raw" mode (i.e. X-server is running) the
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Reset key is just another keypress event. A cheezy substitute in
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this case is holding down the upper right-most unlabeled key and
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then pressing the unlabeled key to its left. Note that this only
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works if HIL (level 1) interrupts are not masked.
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DEBUG
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Compiles in a variety of consistency checks and debug printfs
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throughout the hp300 MD code and device drivers.
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COMPAT_HPUX
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Enables HP-UX binary compatibility mode. Allows a variety of
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"recent" HP-UX binaries to be run unchanged. Due to the
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evolutionary and "as-needed" nature of this code, "recent" is
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anywhere from release 6.2 to 8.0 of HP-UX. It will run 8.0
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shared-library binaries (assuming all the necessary shared-libraries
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are installed in the filesystem).
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COMPAT_OHPUX
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Compile in old 4.2-ish HP-UX (pre-6.0?) compatibility code.
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FPCOPROC
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Compile in code to support the 68881 and above FPU. Should always
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be defined, since all supported SPUs have one. Don't even know if
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it will compile, much less work, without this option. Defined in
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the prototype makefile (hp300/conf/Makefile.hp300).
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DCMSTATS
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Compile in code to collect a variety of transmit/receive statistics
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for the 98642 4-port MUX.
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WAITHIST
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Compile in code to collect statistics about the distribution of
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wait-times for various busy waits in the SCSI host-adaptor driver.
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STACKCHECK
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Enables two types of kernel stack checking in hp300/hp300/locore.s:
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1. stack "overflow". On every clock interrupt we ensure that
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the current kernel stack has not grown into the user struct
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page, i.e. size exceeded UPAGES-1 pages.
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2. stack "underflow". Before every rte to user mode we ensure
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that we will be exactly at the base of the stack after the
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exception frame has been popped.
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This option can degrade performance considerably, use it only if
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you suspect a problem with kernel stacks.
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SCSI_REVPRI
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Changes autoconf to start matching logical SCSI devices starting
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at slave 6 and working backwards instead of starting at slave 0
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and working up. Later releases of the HP boot ROM search for
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boot devices in this manner. This is apparently the order in
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which priority is given to slaves on the host adaptor. Define
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this if you use wildcarding and want to stay in sync with the
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boot ROM's strategy.
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MAPPEDCOPY
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Use page remapping to do large copyin/copyouts. When defined
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the default is to use mapped copy for operations on one page
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or more except on machines with virtually-indexed caches.
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See initcpu() in machdep.c
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BUFFERS_UNMANAGED
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Set up the buffer cache "below" the machine independent VM.
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Normally, in startup() we use vm_map operations to initially
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assign physical memory to the buffers. This creates a map with
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a huge number of map entries (twice the number of buffers)
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which serve no purpose since remaining buffer operations
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(i.e. pagemove) work below the MI layer anyway. Defining this
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symbol will cause startup() to use pmap operations to map the
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initial pages leaving the buffer_map one big entry.
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