sys: Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

Add CFI start/end proc directives to arm64, i386, and ppc

Follow-up to r353959 and r368070: do the same for other architectures.

arm32 already seems to use its own .fnstart/.fnend directives, which

Add CFI start/end proc directives to arm64, i386, and ppc

Follow-up to r353959 and r368070: do the same for other architectures.

arm32 already seems to use its own .fnstart/.fnend directives, which
appear to be ARM-specific variants of the same thing. Likewise, MIPS
uses .frame directives.

Reviewed by: arichardson
Differential Revision: https://reviews.freebsd.org/D27387

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powerpc/booke: Fix 32-bit Book-E SMP AP bringup

r354266 changed the type of bp_kernload to vm_paddr_t in platform_mpc85xx.c,
but not the variable itself in locore.S. This caused the AP to not come

powerpc/booke: Fix 32-bit Book-E SMP AP bringup

r354266 changed the type of bp_kernload to vm_paddr_t in platform_mpc85xx.c,
but not the variable itself in locore.S. This caused the AP to not come up,
due to overwriting the following variable (bp_virtaddr). Also, properly
load bp_kernload into MAS3 and MAS7. Prior to r354266, we required loading
into the low 4GB, but now we can load from anywhere in memory that ubldr can
access.

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Add support for building Book-E kernels with clang/lld.

This involved several changes:

* Since lld does not like text relocations, replace SMP boot page text relocs
in booke/locore.S with position-

Add support for building Book-E kernels with clang/lld.

This involved several changes:

* Since lld does not like text relocations, replace SMP boot page text relocs
in booke/locore.S with position-independent math, and track the virtual base
in the SMP boot page header.

* As some SPRs are interpreted differently on clang due to the way it handles
platform-specific SPRs, switch m*dear and m*esr mnemonics out for regular
m*spr. Add both forms of SPR_DEAR to spr.h so the correct encoding is selected.

* Change some hardcoded 32 bit things in the boot page to be pointer-sized, and
fix alignment.

* Fix 64-bit build of booke/pmap.c when enabling pmap debugging.

Additionally, I took the opportunity to document how the SMP boot page works.

Approved by: jhibbits (mentor)
Differential Revision: https://reviews.freebsd.org/D21999

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powerpc/booke: Don't zero MAS8, it's unnecessary

MAS8 is hypervisor privileged, defining the logical partition (VM) to
operate on for TLB accesses. It's already guaranteed to be cleared when
bootin

powerpc/booke: Don't zero MAS8, it's unnecessary

MAS8 is hypervisor privileged, defining the logical partition (VM) to
operate on for TLB accesses. It's already guaranteed to be cleared when
booting bare metal (bootloader needs it zeroed to work), and we can't touch
it from a guest. Assume that if/when we eventually port bhyve to PowerPC
(and Book-E) the hypervisor module will take care of managing MAS8. This
saves several (tens) of clocks on each TLB miss.

MFC after: 2 weeks

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Merge ^/head r352764 through r353315.

powerpc/booke64: Align initial stack setting to match that of aim64's

Clang9/LLD9 appears to get quite confused with the instruction stream used
to obtain the tmpstack pointer, almost as though it t

powerpc/booke64: Align initial stack setting to match that of aim64's

Clang9/LLD9 appears to get quite confused with the instruction stream used
to obtain the tmpstack pointer, almost as though it thinks this is a C
function, so tries to optimize it. Since the AIM64 method doesn't use the
TOC to obtain the tmpstack, just follow that model, and lld won't get
confused.

Reported by: bdragon
MFC after: 2 weeks

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MFHead @347527

Sponsored by: The FreeBSD Foundation

powerpc: Stop pretending we run on e500v1 cores

Unconditional writing to MAS7, which doesn't exist on the e500v1 core, in a
TLB miss handler has been in the code for several years now. Since this h

powerpc: Stop pretending we run on e500v1 cores

Unconditional writing to MAS7, which doesn't exist on the e500v1 core, in a
TLB miss handler has been in the code for several years now. Since this has
gone unnoticed for so long, it's easily concluded that e500v1 is not in use
with FreeBSD. Simplify the code path a bit, by unconditionally zeroing MAS7
instead of calling a subroutine to do it.

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MFHead@r345677

powerpc64: Use medium code model in asm files for TOC references

Summary:
With a sufficiently large TOC, it's possible to index out of range, as
the immediate load instructions only permit 16-bit in

powerpc64: Use medium code model in asm files for TOC references

Summary:
With a sufficiently large TOC, it's possible to index out of range, as
the immediate load instructions only permit 16-bit indices, allowing up
to 64kB range (signed) from the base pointer. Allow +/- 2GB range, with
the medium code model TOC accesses in asm.

Patch originally by Brandon Bergren. The issue appears to impact ELFv2
more than ELFv1.

Reviewed by: luporl
Differential Revision: https://reviews.freebsd.org/D19708

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MFHead@r345275

MFhead@r344786

Merge ^/head r344549 through r344775.

powerpc/booke: Depessimize MAS register updates even more

Remove isyncs between MAS register updates in the TLB miss handler, since
it's only needed before the TLB update instructions.

Merge ^/head r341764 through r341812.

powerpc/booke: Don't get and use the load offset for TOC on APs

The code was a near exact copy of the code in startup, but it doesn't need
the complexity since the kernel is already relocated. With

powerpc/booke: Don't get and use the load offset for TOC on APs

The code was a near exact copy of the code in startup, but it doesn't need
the complexity since the kernel is already relocated. With
VM_MIN_KERNEL_ADDRESS as currently set to KERNBASE, this doesn't cause a
problem, because it's a zero offset. However, when KERNBASE is changed to a
physical load address, it then has a non-zero offset, and ends up with an
invalid stack pointer, causing the AP to hang.

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Merge ^/head r340918 through r341763.

powerpc: Prepare Book-E kernels for KERNBASE != run base

Book-E kernels really run at VM_MIN_KERNEL_ADDRESS, which currently happens to
be the same as KERNBASE. KERNBASE is the linked address, whic

powerpc: Prepare Book-E kernels for KERNBASE != run base

Book-E kernels really run at VM_MIN_KERNEL_ADDRESS, which currently happens to
be the same as KERNBASE. KERNBASE is the linked address, which the loader also
takes to be the physical load address. Treat KERNBASE as a physical address,
not a virtual, and change virtual address references for KERNBASE to use
something more appropriate.

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Remove dead errata fixup code

This code caused more problems than it should have fixed (boot failures) on
the machines I tested, so has been commented out for a while now. Remove
it, and assume the

Remove dead errata fixup code

This code caused more problems than it should have fixed (boot failures) on
the machines I tested, so has been commented out for a while now. Remove
it, and assume the errata fixups were done by the bootloader where they
belong.

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Rename assym.s to assym.inc

assym is only to be included by other .s files, and should never
actually be assembled by itself.

Reviewed by: imp, bdrewery (earlier)
Sponsored by: The FreeBSD Foundati

Rename assym.s to assym.inc

assym is only to be included by other .s files, and should never
actually be assembled by itself.

Reviewed by: imp, bdrewery (earlier)
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D14180

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Merge ^/head r327169 through r327340.

kernel: Fix several typos and minor errors

- duplicate words
- typos
- references to old versions of FreeBSD

Reviewed by: imp, benno

Merge ^/head r323559 through r325504.

MFhead@r325383