Well, I'm really sick of people complaining about not being able to get
at the things the resource manager knows from userspace. So I've done
something about it.
Please review:
http://ziplok.dyndns.org/msmith/rman.diff
http://ziplok.dyndns.org/msmith/iostat.diff
which adds the new '-r' flag to iostat which will print the current
resource manager ownership database. I have similar interfaces underway
to access the devclass and device trees, so that an enterprising
user-space hacker could trivially construct a complete map of the system
bus and resource structure using any of several different organisations.
I may write a small user-space library to sit on top of these interfaces
to make life easier. sysctl is not the cleanest of interfaces for this
application, but it does the job.
Comments? Here's some sample output; the leading index numbers are
possibly misleading and I was considering removing them. I haven't
decided yet what to do about formatting conventions; they may end up
going into the rman initialisation.
0: Interrupt request lines 0x0-0xf
0: attimer0 0x0
1: atkbd0 0x1 active shareable
2: atpic0 0x2
3: sio1 0x3 active
4: sio0 0x4 active
6: ppc0 0x7 active shareable
7: attimer1 0x8
9: uhci0 0xa active shareable
11: nomatch 0xc
12: npxisa0 0xd
13: ata0 0xe active
14: ata1 0xf active
1: DMA request lines 0x0-0x7
1: ppc0 0x3 active
2: atdma0 0x4
2: I/O ports 0x0-0xffff
0: atdma0 0x0-0xf
2: atpic0 0x20-0x21
4: attimer0 0x40-0x43
6: atkbdc0 0x60 active
7: nomatch 0x61
9: atkbdc0 0x64 active
11: attimer1 0x70-0x71
13: atdma0 0x80-0x90
15: atdma0 0x94-0x9f
16: atpic0 0xa0-0xa1
18: atdma0 0xc0-0xde
20: npxisa0 0xf0
22: ata1 0x170-0x177 active
24: ata0 0x1f0-0x1f7 active
26: sysresource1 0x290-0x297
28: sio1 0x2f8-0x2ff active
3: I/O memory addresses 0x0-0xffffffff
0: sysresource0 0x0-0x9ffff
1: vga0 0xa0000-0xbffff active shareable
3: sysresource0 0xcd000-0xcffff
5: sysresource0 0xe8000-0xeffff
6: sysresource0 0xf0000-0xf3fff
7: sysresource0 0xf4000-0xf7fff
8: sysresource0 0xf8000-0xfffff
9: sysresource0 0x100000-0x7ffffff
11: fxp0 0xe3000000-0xe3000fff active
13: sysresource0 0xfffe0000-0xffffffff
--
... every activity meets with opposition, everyone who acts has his
rivals and unfortunately opponents also. But not because people want
to be opponents, rather because the tasks and relationships force
people to take different points of view. [Dr. Fritz Todt]
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