intrng: fix INTR_ROOT_* constants

Switch to INTR_ROOT_COUNT as this name better describes its purpose.

Remove the default INTR_ROOT_IRQ from the core. Define it (redundantly)
in each architecture'

intrng: fix INTR_ROOT_* constants

Switch to INTR_ROOT_COUNT as this name better describes its purpose.

Remove the default INTR_ROOT_IRQ from the core. Define it (redundantly)
in each architecture's header, but now placed alongside its sibling
values (if defined by the platform, e.g. arm64 INTR_ROOT_FIQ).

Reviewed by: mhorne
Pull Request: https://github.com/freebsd/freebsd-src/pull/1280

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sys/intr.h: Make it safe to include from assembler

Sometimes we need defines from this file in assembler code. Today we do
the heavyweight approach of using genassym for that. However, they are
just

sys/intr.h: Make it safe to include from assembler

Sometimes we need defines from this file in assembler code. Today we do
the heavyweight approach of using genassym for that. However, they are
just #defines, so in the future we want to include sys/intr.h to pick up
the needed constants in exception.S.

PR: 283041
Sponsored by: Netflix
Reviewed by: mmel, andrew
Differential Revision: https://reviews.freebsd.org/D47846

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Revert "intrng: change multi-interrupt root support type to enum"

This reverts commit 536c8d948e8563141356fd41fb8bfe65be289385. The
change seemed fine on the surface, but converting to an enum has

Revert "intrng: change multi-interrupt root support type to enum"

This reverts commit 536c8d948e8563141356fd41fb8bfe65be289385. The
change seemed fine on the surface, but converting to an enum has raised
some concerns due to the asm <-> C interface. Back it out and let
someone else deal with it later if they'd like to.

Further context about the concerns can be found in D47279.

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sys/intr.h: formally depend on machine/intr.h

sys/intr.h originally started life as an extract of arm's intr.h, and
this include was dropped in its place. Changes in flight want to add
some MD defi

sys/intr.h: formally depend on machine/intr.h

sys/intr.h originally started life as an extract of arm's intr.h, and
this include was dropped in its place. Changes in flight want to add
some MD definitions that we'll use in the more MI parts of INTRNG.

Let's formally reverse the dependency now since this is way more
common in general. All of the includes switched in this change that I
spot-checked were in-fact wanting declarations historically included in
sys/intr.h anyways.

Reviewed by: andrew, imp, jrtc27, mhorne, mmel, olce
Differential Revision: https://reviews.freebsd.org/D47002

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intrng: change multi-interrupt root support type to enum

uint32_t is handy for directly interfacing with assembly-language. For
the C portion, enum is much handier. In particular there is no need

intrng: change multi-interrupt root support type to enum

uint32_t is handy for directly interfacing with assembly-language. For
the C portion, enum is much handier. In particular there is no need to
count the number of roots by hand. This also works better for being
able to build kernels with varying numbers of roots.

Switch to INTR_ROOT_COUNT as this better matches the purpose of the
value. Switch to root_type, rather than rootnum for similar reasons.

Remove the default from the core. Better to require the architectures
to declare the type since they will routinely deviate and a default
chosen now will likely be suboptimal.

Leave intr_irq_handler() taking a register type as that better matches
for interfacing with assembly-language.

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riscv: Convert local interrupt controller to a newbus PIC

Currently the local interrupt controller implementation is based on
pre-INTRNG arm/arm64 code, using hand-rolled event code rather than
INTR

riscv: Convert local interrupt controller to a newbus PIC

Currently the local interrupt controller implementation is based on
pre-INTRNG arm/arm64 code, using hand-rolled event code rather than
INTRNG. This then interacts weirdly with the PLIC, and other future
interrupt controllers like the APLIC and IMSICs in the upcoming AIA
specification, since they become the root PIC despite not being the
logical root. Instead, use a real newbus device for it and register
it as the root PIC.

This also adapts the IPI code to make use of the newly-added INTRNG
generic IPI handling framework, adding a new sbi_ipi as the PIC. In
future there will be alternative devices for sending IPIs that will
register with higher priorities, such as the proposed AIA IMSIC and
ACLINT SSWI.

Reviewed by: mhorne
MFC after: 1 month
Differential Revision: https://reviews.freebsd.org/D35901

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

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

o Add driver for PLIC (Platform-Level Interrupt Controller) device.
o Convert interrupt machdep support to use INTRNG code.

Sponsored by: DARPA, AFRL

Merge ^/head r303250 through r304235.

Update RISC-V port to Privileged Architecture Version 1.9.

Sponsored by: DARPA, AFRL
Sponsored by: HEIF5

Add the non-standard "IO interrupt" vector used by lowRISC.
For now they provide UART irq only.

Sponsored by: DARPA, AFRL
Sponsored by: HEIF5

MFH

Sponsored by: The FreeBSD Foundation

Merge ^/head r295902 through r296006.

Add support for symmetric multiprocessing (SMP).

Tested on Spike simulator with 2 and 16 cores (tlb enabled),
so set MAXCPU to 16 at this time.

This uses FDT data to get information about CPUs
(cod

Add support for symmetric multiprocessing (SMP).

Tested on Spike simulator with 2 and 16 cores (tlb enabled),
so set MAXCPU to 16 at this time.

This uses FDT data to get information about CPUs
(code based on arm64 mp_machdep).

Invalidate entire TLB cache as it is the only way yet.

Sponsored by: DARPA, AFRL
Sponsored by: HEIF5

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MFH r289384-r293170

Sponsored by: The FreeBSD Foundation

MFH @r292599

This includes the pluggable TCP framework and other chnages to the
netstack to track for VNET stability.

Security: The FreeBSD Foundation

Import RISC-V machine headers. This is a minimal set required to compile
kernel and userland.

Reviewed by: andrew, imp, kib
Sponsored by: DARPA, AFRL
Sponsored by: HEIF5
Differential Revision: https

Import RISC-V machine headers. This is a minimal set required to compile
kernel and userland.

Reviewed by: andrew, imp, kib
Sponsored by: DARPA, AFRL
Sponsored by: HEIF5
Differential Revision: https://reviews.freebsd.org/D4554

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