additional processors are spun up on multiprocessor Alpha systems.
Now, each processor gets its own idle thread (the primary processor
uses proc0). This idle thread is used in switch_exit(), rather than
explicitly referencing proc0.
Also, make `curproc', `fpcurproc', and `curpcb' per-cpu values. This
required some data structure rearrangement; cpu info is now statically
allocated in the BSS, rather than via malloc(), and cpu_softc is gone.
(Modeled somewhat after NetBSD/sparc's multiprocessor info structures.)
minor of libc and the major of libutil). For little-endian architectures
merge the bnswap() assembly versions with nto* and hton* using symbols
aliasing. Use symbol renaming for the bswap function in this case to avoid
namespace pollution.
Declare bswap* in machine/bswap.h, not machine/endian.h. For little-endian
machines, common code for inline macros go in machine/byte_swap.h
Sync libkern with libc.
Adjust #include in kernel sources for machine/bswap.h.
exported to the MI kernel. Almost everything here was formerly in cpu.h.
Optionally, this module could in the future be used to #include anything
that is always needed by arch/alpha modules.
They should not be visible to the MI kernel and the MI kernel shouldn't
depend on this junk. Most of it moves to new module <machine/alpha.h>.
Leave badaddr() here, though, because it's used so widely.
I just cannot add one more platform without getting sick.
Instead, we do just one table for all platforms. More-or-less,
it was only the A12 that even named it's individual interrupts anyway.
Also, prototype set_iointr() here. It's a slightly odd place, but 10*
better than the old place it was, and this file is included by exactly
the perfect set of .c files for set_iointr() visibility.
- cpu_set_kpc() now takes void *arg third argument, passed to the
entry point.
- cpu_fork() allows parent to be non-curproc iff parent is proc0.
When forking non-curproc, assume its state has already been saved.
- Adjust various pieces of machine-dependent code to account of all of this.
Alpha system, conditional on MULTIPROCESSOR.
NOTE: This does not yet work completely. The secondary CPU begins the
boot process, but never makes it into the cpu spinup trampoline. This
is merely a snapshot of a work-in-progress.
bus_space(9), if drivers want it (they shouldn't; easy to convert) they
can define it right before including bus.h. There's been a release since
the interfaces were (slightly) changed, and no code in the source tree
uses the old interfaces as far as I can tell.
cgd