unaligned access handler and clean it up some. Add support for emulating
the BWX instructions (ld{b,w}u, st{b,w}, sext{b,w}), which user software
can expect to be emulated. (Thanks, Alpha Architecture!)
register names was confusing, and could not _be_ correct in some cases.
Also, add a couple of 'generic' instruction formats which should be used
when decoding instructions before the specific format is known.
so that devices which must allocate DMA memory in this range (e.g.
PixelStamp graphics boards) have a better chance of doing so, without
an awful hack.
_splraise, _spllower, _splset, _splget, _setsoftintr, _clrsoftintr, _splnone.
They manipulate MIPS processor's 8 interrupt sources and are used
as building blocks for NetBSD spl(9) kernel interface. Note that
MIPS processor doesn't enforce inclusive 'interrupt levels' found
in other processors, then the hierarchal nature of IPL must be
implemented by composing MIPS processor interrupt masks appropriately.
With the simplest target port in which small number of devices are
independently assigned with 6 external interrupt signal lines,
spl(9) kernel interface will be implemented with #define's of
processor interrupt controls mentioned above. In more general
cases, in which target computers have many devices and 'system
registers' indicating pending interrupt sources at any moment,
spl(9) will be implemented with more complex machinary manipulating
processor interrupts and system registers in target port dependent
ways.
- Nuke unused code and reorder locore definitions. XXX Following
routines will be replaced with C language version; setrunqueue,
remrunqueue, switchfpregs, savefpregs, MachFPInterrupt.
the console. New algorithm:
* if stdin == keyboard, and parent of keyboard == adb, use ADB.
* else, must be a USB keyboard. Search backwards though the parents
until the USB controller is located. Determine its location in the PCI
domain, and which type of controller it is, and tell that controller that
it has the console input device. The USB code will then attach the first
USB keyboard as the console input device during autoconfiguration.
The iMac and Blue and White G3 consoles are fully functional now!
of the buffer you're copying from as the loop interator, not the length
of the buffer you're copying to. Also, rewrite print_single() with
pointer instead of array operators. Appears to correct some ADB-related
`hangs' during autoconfig.
necessary because some interrupt handlers may cause additional faults (e.g.
through R/M emulation) and thereby trash the previous fault state.
From Richard Earnshaw.
