1 $NetBSD: Options,v 1.9 2006/03/08 23:46:23 lukem Exp $
3 Here is a list of hp300 specific kernel compilation options and what they
7 Compiles in support for virtually addressed cache (VAC) found on
8 hp320 and 350 machines. Should only be defined when HP320 and/or
12 Support for old hp320 machines: 16 MHz 68020, HP MMU, 16 MHz 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.
17 Support for old hp350 machines: 25 MHz 68020, HP MMU, 20 MHz 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.
23 Support for old hp330 (and 318/319) machines: 16 MHz 68020, 68851 PMMU
24 and 16 MHz 68881. Compiles in support for PMMU.
28 Support for old 340 and hp360 machines: 25 MHz 68030+MMU and 25 MHz
29 68882. Compiles in support for PMMU and 68030. Differs from HP330
30 in support for 68030 on-chip data cache.
33 Support for old hp370 (and current 345/375/400) machines: 33 (50) MHz
34 68030+MMU and 33 (50) MHz 68882. Compiles in support for PMMU, 68030
35 and off-chip physically addressed cache. Differs from 360 in only one
36 place, in dealing with flushing the external cache.
39 Support for "current" hp380/425 (and 433) machines: 25 (33) MHz 68040
40 with MMU/FPU. Compiles in support for 68040.
43 Compiles in support to link with Motorola's 68040 FP emulation
44 library. Kernel will build and run without this option, but many
45 binaries will core dump. Should not be defined unless HP380 is.
49 Twinkle the hp4xx front panel (or hp3xx internal) LEDs in the HP
50 designated way. Somewhat frivolous, but the heartbeat LED is
51 useful to see if your machine is alive.
54 Compiles in code which will enable a "force-crash" HIL keyboard
55 sequence. When the Reset key is typed twice in succession (within
56 half a second) the kernel will panic. Note that the HIL Reset key
57 sends a NMI to the processor which will get the CPUs attention no
58 matter what it is doing (i.e. as long as it isn't halted). Alas,
59 also note that the NMI is only sent when the keyboard is in "cooked"
60 (ITE) mode. If it is in "raw" mode (i.e. X-server is running) the
61 Reset key is just another keypress event. A cheezy substitute in
62 this case is holding down the upper right-most unlabeled key and
63 then pressing the unlabeled key to its left. Note that this only
64 works if HIL (level 1) interrupts are not masked.
67 Compiles in a variety of consistency checks and debug printfs
68 throughout the hp300 MD code and device drivers.
71 Compile in code to collect a variety of transmit/receive statistics
72 for the 98642 4-port MUX.
75 Compile in code to collect statistics about the distribution of
76 wait-times for various busy waits in the SCSI host-adaptor driver.
79 Enables two types of kernel stack checking in hp300/hp300/locore.s:
80 1. stack "overflow". On every clock interrupt we ensure that
81 the current kernel stack has not grown into the user struct
82 page, i.e. size exceeded UPAGES-1 pages.
83 2. stack "underflow". Before every rte to user mode we ensure
84 that we will be exactly at the base of the stack after the
85 exception frame has been popped.
86 This option can degrade performance considerably, use it only if
87 you suspect a problem with kernel stacks.
90 Changes autoconf to start matching logical SCSI devices starting
91 at slave 6 and working backwards instead of starting at slave 0
92 and working up. Later releases of the HP boot ROM search for
93 boot devices in this manner. This is apparently the order in
94 which priority is given to slaves on the host adaptor. Define
95 this if you use wildcarding and want to stay in sync with the
99 Use page remapping to do large copyin/copyouts. When defined
100 the default is to use mapped copy for operations on one page
101 or more except on machines with virtually-indexed caches.
102 See initcpu() in machdep.c
105 Set up the buffer cache "below" the machine independent VM.
106 Normally, in startup() we use vm_map operations to initially
107 assign physical memory to the buffers. This creates a map with
108 a huge number of map entries (twice the number of buffers)
109 which serve no purpose since remaining buffer operations
110 (i.e. pagemove) work below the MI layer anyway. Defining this
111 symbol will cause startup() to use pmap operations to map the
112 initial pages leaving the buffer_map one big entry.