Create a new header lwp_private.h to contain _lwp_getprivate_fast,
_lwp_gettcb_fast, _lwp_settcb and remove them from mcontext.h, so that:
1. we don't need special hacks to hide them
2. we can include <lwp.h> where needed to get the necessary prototypes
without redefining them locally.

branches: 1.25.20;
Merge the x86 gdt function and constant definitions

branches: 1.24.14;
Undo previous, fixed in userland.

expose the {rd,wr}msr functions to userland and install the header for
the benefit of cpuctl (fix the build).

branches: 1.22.4;
Stop installing dbregs.h

This is now kernel-only header. The behavior is well specified by the CPU
documents and we don't introduce changes to it.

Noted by <wiz>

branches: 1.21.8;
Add support for hardware assisted watchpoints/breakpoints API in ptrace(2)

Add new ptrace(2) calls:
- PT_COUNT_WATCHPOINTS - count the number of available hardware watchpoints
- PT_READ_WATCHPOINT - read struct ptrace_watchpoint from the kernel state
- PT_WRITE_WATCHPOINT - write new struct ptrace_watchpoint state, this
includes enabling and disabling watchpoints

The ptrace_watchpoint structure contains MI and MD parts:

typedef struct ptrace_watchpoint {
int pw_index; /* HW Watchpoint ID (count from 0) */
lwpid_t pw_lwpid; /* LWP described */
struct mdpw pw_md; /* MD fields */
} ptrace_watchpoint_t;

For example amd64 defines MD as follows:
struct mdpw {
void *md_address;
int md_condition;
int md_length;
};

These calls are protected with the __HAVE_PTRACE_WATCHPOINTS guard.

Tested on amd64, initial support added for i386 and XEN.

Sponsored by <The NetBSD Foundation>

branches: 1.20.2;
Add cpu_rng, a framework for simple on-CPU random number generators.

branches: 1.19.6;
Move sys/arch/amd64/amd64/fpu.c and sys/arch/amd64/include/fpu.h
into sys/arch/x86 in preparation for using the same code for i386.

Userspace (especially libkvm) build better is cpu_extended_state.h
is exported.

branches: 1.17.2; 1.17.4;
Extend the CPU microcode update framework to support Intel x86 CPUs.
Contrary to the AMD implementation, it doesn't use xcalls to distribute
the update to all CPUs but relies on cpuctl(8) to bind itself to the
right CPU -- to keep it simple and avoid possible problems with
hyperthreading.
Also, it doesn't parse the vendor supplied file to pick the right
part for the present CPU model but relies on userland to prepare
files with specific filenames. I'll commit a pkg for this in a minute
(pkgsrc/sysutils/intel-microcode).
The ioctl interface changed; compatibility is provided (should be
limited to COMPAT_NETBSD6 as soon as this is available).

branches: 1.16.2;
Good-bye bus.h. Don't install <machine/bus.h>.

To use x86/cpu.h struct cpu_info from userland, we need via_padlock.h installed.

Install x86/pte.h

branches: 1.13.12; 1.13.18; 1.13.20;
Share cpu.h between the x86 ports.

branches: 1.12.6; 1.12.8; 1.12.10; 1.12.12;
- rewrite P->V tracking.
- use a hash rather than SPLAY trees.
SPLAY tree is a wrong algorithm to use here.
will be revisited if it slows down anything other than
micro-benchmarks.
- optimize the single mapping case (it's a common case) by
embedding an entry into mdpage.
- don't keep a pmap pointer as it can be obtained from ptp.
(discussed on port-i386 some years ago.)
ideally, a single paddr_t should be enough to describe a pte.
but it needs some more thoughts as it can increase computational
costs.
- pmap_enter: simplify and fix races with pmap_sync_pv.
- don't bother to lock pm_obj[i] where i > 0, unless DIAGNOSTIC.
- kill mp_link to save space.
- add many KASSERTs.

branches: 1.11.2; 1.11.8;
merge yamt-x86pmap branch.

- reduce differences between amd64 and i386. notably, share pmap.c
between them. it makes several i386 pmap improvements available to
amd64, including tlb shootdown reduction and bug fixes from Stephan Uphoff.
- implement deferred pmap switching for amd64.
- remove LARGEPAGES option. always use large pages if available.
also, make it work on amd64.

branches: 1.10.10; 1.10.12; 1.10.14; 1.10.16;
+ x86/sysarch.h

branches: 1.9.2; 1.9.6; 1.9.8;
Merge newlock2 to head.

Report on and where possible, try to work around some of the known errata
for Athlon 64 and Opteron processors. Tested briefly by cube@ and elad@.

branches: 1.7.14;
Revert yesterday's change that attempted to fix the detection of the
boot device when using a Multiboot boot loader. It couldn't work because
these boot loaders do not pass a checksum of the disk so matchbiosdisk()
cannot really find any matches. I should have gone to sleep before
commiting...

Found by xtraeme@.

branches: 1.6.2;
When booting an i386 kernel with Multiboot, properly detect the boot device
by looking it up in the x86_alldisks table (instead of trying to match it
to 'wd*' manually).

In order to do this, move the cpu_rootconf function from x86 common code
to amd64 and i386 specific one. This way, i386 can do an extra step (call
the appropriate Multiboot code) in the appropriate place (after
x86_matchbiosdisks and before findroot()).

branches: 1.5.16; 1.5.30;
Use a common <machine/math.h> for amd64 and i386.

branches: 1.4.2;
Install cacheinfo.h

Install cpuvar.h

Move a few more files to x86/include. Trim the list of files to install
in /usr/include a bit.

Install header files.