Options revision 1.3
1 $NetBSD: Options,v 1.3 1994/10/26 07:22:52 cgd Exp $ 2 3 Here is a list of hp300 specific kernel compilation options and what they 4 mean: 5 6 HAVEVAC 7 Compiles in support for virtually addressed cache (VAC) found on 8 hp320 and 350 machines. Should only be defined when HP320 and/or 9 HP350 is. 10 11 HP320 12 Support for old hp320 machines: 16mhz 68020, HP MMU, 16mhz 68881 13 and VAC. Compiles in support for a VAC, HP MMU, and the 98620A 14 16-bit DMA channel. Forces the definition of HAVEVAC. 15 16 HP350 17 Support for old hp350 machines: 25mhz 68020, HP MMU, 20mhz 68881 18 and VAC. Compiles in support for a VAC and the HP MMU. Differs 19 from HP320 in that it has no support for 16-bit DMA controller. 20 Forces the definition of HAVEVAC. 21 22 HP330 23 Support for old hp330 (and 318/319) machines: 16mhz 68020, 68551 PMMU 24 and 16mhz 68881. Compiles in support for PMMU. 25 26 HP360 27 Support for old hp360 (and 340) machines: 25mhz 68030+MMU and 25mhz 28 68882. Compiles in support for PMMU and 68030. Differs from HP330 29 in support for 68030 on-chip data cache. 30 31 HP370 32 Support for old hp370 (and current 345/375/400) machines: 33 (50) mhz 33 68030+MMU and 33 (50) mhz 68882. Compiles in support for PMMU, 68030 34 and off-chip physically addressed cache. Differs from 360 in only one 35 place, in dealing with flushing the external cache. 36 37 HP380 38 Support for "current" hp380/425 (and 433) machines: 25 (33) mhz 68040 39 with MMU/FPU. Compiles in support for 68040. 40 41 FPSP 42 Compiles in support to link with Motorola's 68040 FP emulation 43 library. Kernel will build and run without this option, but many 44 binaries will core dump. Should not be defined unless HP380 is. 45 46 47 USELEDS 48 Twinkle the hp4xx front panel (or hp3xx internal) LEDs in the HP 49 designated way. Somewhat frivolous, but the heartbeat LED is 50 useful to see if your machine is alive. 51 52 PANICBUTTON 53 Compiles in code which will enable a "force-crash" HIL keyboard 54 sequence. When the Reset key is typed twice in succession (within 55 half a second) the kernel will panic. Note that the HIL Reset key 56 sends a NMI to the processor which will get the CPUs attention no 57 matter what it is doing (i.e. as long as it isn't halted). Alas, 58 also note that the NMI is only sent when the keyboard is in "cooked" 59 (ITE) mode. If it is in "raw" mode (i.e. X-server is running) the 60 Reset key is just another keypress event. A cheezy substitute in 61 this case is holding down the upper right-most unlabeled key and 62 then pressing the unlabeled key to its left. Note that this only 63 works if HIL (level 1) interrupts are not masked. 64 65 DEBUG 66 Compiles in a variety of consistency checks and debug printfs 67 throughout the hp300 MD code and device drivers. 68 69 COMPAT_HPUX 70 Enables HP-UX binary compatibility mode. Allows a variety of 71 "recent" HP-UX binaries to be run unchanged. Due to the 72 evolutionary and "as-needed" nature of this code, "recent" is 73 anywhere from release 6.2 to 8.0 of HP-UX. It will run 8.0 74 shared-library binaries (assuming all the necessary shared-libraries 75 are installed in the filesystem). 76 77 COMPAT_OHPUX 78 Compile in old 4.2-ish HP-UX (pre-6.0?) compatibility code. 79 80 FPCOPROC 81 Compile in code to support the 68881 and above FPU. Should always 82 be defined, since all supported SPUs have one. Don't even know if 83 it will compile, much less work, without this option. Defined in 84 the prototype makefile (hp300/conf/Makefile.hp300). 85 86 DCMSTATS 87 Compile in code to collect a variety of transmit/receive statistics 88 for the 98642 4-port MUX. 89 90 WAITHIST 91 Compile in code to collect statistics about the distribution of 92 wait-times for various busy waits in the SCSI host-adaptor driver. 93 94 STACKCHECK 95 Enables two types of kernel stack checking in hp300/hp300/locore.s: 96 1. stack "overflow". On every clock interrupt we ensure that 97 the current kernel stack has not grown into the user struct 98 page, i.e. size exceeded UPAGES-1 pages. 99 2. stack "underflow". Before every rte to user mode we ensure 100 that we will be exactly at the base of the stack after the 101 exception frame has been popped. 102 This option can degrade performance considerably, use it only if 103 you suspect a problem with kernel stacks. 104 105 SCSI_REVPRI 106 Changes autoconf to start matching logical SCSI devices starting 107 at slave 6 and working backwards instead of starting at slave 0 108 and working up. Later releases of the HP boot ROM search for 109 boot devices in this manner. This is apparently the order in 110 which priority is given to slaves on the host adaptor. Define 111 this if you use wildcarding and want to stay in sync with the 112 boot ROM's strategy. 113 114 MAPPEDCOPY 115 Use page remapping to do large copyin/copyouts. When defined 116 the default is to use mapped copy for operations on one page 117 or more except on machines with virtually-indexed caches. 118 See initcpu() in machdep.c 119 120 BUFFERS_UNMANAGED 121 Set up the buffer cache "below" the machine independent VM. 122 Normally, in startup() we use vm_map operations to initially 123 assign physical memory to the buffers. This creates a map with 124 a huge number of map entries (twice the number of buffers) 125 which serve no purpose since remaining buffer operations 126 (i.e. pagemove) work below the MI layer anyway. Defining this 127 symbol will cause startup() to use pmap operations to map the 128 initial pages leaving the buffer_map one big entry. 129
Indexes created Thu Sep 25 16:09:42 GMT 2025