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9 Commits

Author SHA1 Message Date
Andrew Turner
a2d16bc541 Add support for passing FPU_KERN_NOCTX to fpu_kern_enter on arm64. This 
will be used to call into UEFI from the kernel.

Sponsored by:	DARPA, AFRL
 2017-07-18 16:36:32 +00:00
Andrew Turner
9a19869a5f Store the read-only thread pointer when scheduling a new thread. This is 
not currently set, however we may wish to set it later.
 2017-06-09 15:37:17 +00:00
Andrew Turner
6ed982a221 Add support for the fpu_kern(9) KPI on arm64. It hooks into the existing 
VFP code to store the old context, with lazy loading of the new context
when needed.

FPU_KERN_NOCTX is missing as this is unused in the crypto code this has
been tested with, and I am unsure on the requirements of the UEFI
Runtime Services.

Reviewed by:	kib
Obtained from:	ABT Systeems Ltd
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D8276
 2016-10-20 09:22:10 +00:00
Andrew Turner
4c247b9719 Add PCB_FP_USERMASK so we can mask off floating point flags that should 
not be sent to userspace, for example the future flag to tell when we are
using floating point in the kernel.

Obtained from:	ABT Systems Ltd
Sponsored by:	The FreeBSD Foundation
 2016-10-18 13:39:55 +00:00
Andrew Turner
8ff003011d Rework how we store the VFP registers in the pcb. This will be used when 
creating a floating-point context within the kernel without having to move
the stored values in memory.

Sponsored by:	The FreeBSD Foundation
 2016-10-14 15:53:48 +00:00
Andrew Turner
f2f21faf62 Add support for 4 level pagetables. The userland address space has been 
increased to 256TiB. The kernel address space can also be increased to be
the same size, but this will be performed in a later change.

To help work with an extra level of page tables two new functions have
been added, one to file the lowest level table entry, and one to find the
block/page level. Both of these find the entry for a given pmap and virtual
address.

This has been tested with a combination of buildworld, stress2 tests, and
by using sort to consume a large amount of memory by sorting /dev/zero. No
new issues are known to be present from this change.

Reviewed by:	kib
Obtained from:	ABT Systems Ltd
Relnotes:	yes
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D5720
 2016-03-31 11:07:24 +00:00
Andrew Turner
87e19994e1 Implement single stepping on arm64. We need to set the single step bits in 
the processor and debug state registers. A flag has been added to the pcb
to tell us when to enable single stepping for a given thread.

Reviewed by:	kib
Sponsored by:	ABT Systems Ltd
Differential Revision:	https://reviews.freebsd.org/D4730
 2016-02-02 10:28:56 +00:00
Andrew Turner
144aa0b7f5 Clean up the types used in <machine/ucontext.h> on arm64. As some ports 
include this file without first including the headers needed for uint32_t
and the like use the __foo type.

Obtained from:	ABT Systems Ltd
Sponsored by:	The FreeBSD Foundation
 2015-07-09 12:51:50 +00:00
Andrew Turner
412042e2ae Add the start of the arm64 machine headers. This is the subset needed to 
start getting userland libraries building.

Reviewed by:	imp
Sponsored by:	The FreeBSD Foundation
 2015-03-23 11:54:56 +00:00