Handle speed change events

On a system with both global and private timers, we cannot drive hardclock
from both or else time will move too fast.

Check MPIDR and install the global timer interrupt handler on uniprocessor
configs, and the private timer interrupt handler on MPCore configs.

Merge thorpej-cfargs2.

branches: 1.4.8;
Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

branches: 1.3.2;
Rename of_match_compat_data() to of_compatible_match(). Similarly,
rename of_search_compatible() to of_compatible_lookup().

Standardize on of_compatible_match() for driver matching, and adapt
all call sites.

use fdtbus_intr_establish_xname

branches: 1.1.2; 1.1.10; 1.1.12;
Add a driver for the A5/A9 Private timer.

While here FDTise the Watchdog driver.

On a system with both global and private timers, we cannot drive hardclock
from both or else time will move too fast.

Check MPIDR and install the global timer interrupt handler on uniprocessor
configs, and the private timer interrupt handler on MPCore configs.

Merge thorpej-cfargs2.

branches: 1.6.8;
Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

branches: 1.5.2;
Rename of_match_compat_data() to of_compatible_match(). Similarly,
rename of_search_compatible() to of_compatible_lookup().

Standardize on of_compatible_match() for driver matching, and adapt
all call sites.

use fdtbus_intr_establish_xname

branches: 1.3.12;
Listen for PMFE_SPEED_CHANGED events and automatically update a9tmr frequency

Add support for (FDT-ized) Amlogic Meson8b.

branches: 1.1.2; 1.1.4;
Rename ARM A9 Global Timer driver name to support fdt.

- Rename a9tmr to arma9tmr.
- Add a9tmr_fdt.c based gtmr_fdt.c.

Merge thorpej-cfargs2.

branches: 1.3.8;
Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

branches: 1.2.2;
Rename of_match_compat_data() to of_compatible_match(). Similarly,
rename of_search_compatible() to of_compatible_lookup().

Standardize on of_compatible_match() for driver matching, and adapt
all call sites.

branches: 1.1.2; 1.1.10; 1.1.12;
Add a driver for the A5/A9 Private timer.

While here FDTise the Watchdog driver.

Rename of_match_compat_data() to of_compatible_match(). Similarly,
rename of_search_compatible() to of_compatible_lookup().

Standardize on of_compatible_match() for driver matching, and adapt
all call sites.

use fdtbus_intr_establish_xname

branches: 1.1.2; 1.1.6; 1.1.8; 1.1.24;
Add fdt glue for ARM PrimeCell Advanced Audio CODEC interface (PL041).

acpi: Try PSCI before UEFI RT for shutdown/reset.

BSA says that an OS can use either UEFI RT or PSCI, and that the RT
implementation should just call PSCI.

Given the amount of implementation issues with UEFI RT, let's try PSCI
first, because it's nice to be able to reboot and poweroff even with
buggy firmware.

branches: 1.24.8;
move the creation of machdep.smbios into platform_init().

"dmidecode -d /dev/smbios" now works on x86. also tested on arm64 (lx2k.)

Merge thorpej-cfargs2.

branches: 1.22.2;
smbios: Add character device for accessing SMBIOS tables

The /dev/smbios character device gives an aperture into physical memory
that allows read-only access to the SMBIOS header and tables.

smbios: Support SMBIOS 2.x tables.

Expose SMBIOS tables using sysctl machdep.dmi.*, same as x86.

branches: 1.19.2;
Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

branches: 1.18.2;
Rename of_match_compat_data() to of_compatible_match(). Similarly,
rename of_search_compatible() to of_compatible_lookup().

Standardize on of_compatible_match() for driver matching, and adapt
all call sites.

trailing whitespace

branches: 1.16.2;
Support using EFI runtime services for RTC when booting in devicetree mode.

If acpi_probe() falis, just panic now instead of failing mysteriously later.

Add support for Arm N1 SDP PCIe host controller.

The N1 SDP has a few bugs that we need to work around:
- PCIe root port config space lives in a non-standard location.
- Access to PCIe config space of devices that do not exist results in
an sync SError. Firmware creates a "known devices" table at a fixed
physical address that we use to filter PCI conf access to only known
devices.

This change splits the Arm ACPI PCI quirks into separate files for each
host controller, and allows per-segment quirks to be applied.

These changes exposed some bugs in the MI ACPI layer related to
multi-segment support. The MI ACPI PCI code was using a shared PCI
chipset tag to access devices, and these accesses can happen before our
PCI host bridge drivers are attached! The global chipset tag is now gone,
and an MD callback can provide a custom tag on a per-segment basis.

branches: 1.13.2;
Allow MD code to provide custom bus_dma tags on a per-node basis. On Arm
this is required to return non-coherent bus_dma tags for device nodes with
_CCA=0

Finish the job

Restore previous range of aa_dmat.

Should fix ahcisata_acpi on OverDrive 1000, which has no DRAM below 4GiB.

Provide a 64-bit dma tag and use a coherent tag unless CCA=0

branches: 1.9.4;
Support building kernels with ACPI and no PCI.

Add MSI-X support

Add support for EFI runtime services on aarch64.

Expose SMBIOS table pointer via machdep.smbios sysctl

Some parts of the ACPI subsystem depend on a valid PCI chipset tag in the
ACPI softc. Provide one here, and assume segment 0.

Add support for PCI MSI using ARM GICv2m.

branches: 1.3.2;
Add ARM ACPI PCI support.

Support poweroff via PSCI

Add acpi @ fdt glue

Make the generic Arm platform available for arm32 as well.

Use arm_fdt_cpu_bootstrap

Add a generic Arm64 platform definition that is used as a fallback.

The generic platform assumes PSCI, a generic timer, pre-initialized UART
clocks, and adds a 4KB entry to the devmap for the console UART device.

No need to initialize efi_todr.cookie to NULL.

Refactor the "platform" defitions into fdt_platform.h

Ignore broken UEFI RTS on Radxa Orion O6

branches: 1.21.6;
Rename ARM_PLATFORM to FDT_PLATFORM and make it available outside arm.

efi: Add /dev/efi character device

Introduce a /dev/efi character device that provides a means for accessing
UEFI RT variable services from userland. Compatible with the FreeBSD ioctl
interface for ease of porting their libefivar and associated tools.

The ioctl interface is defined in sys/efiio.h.

To enable support for this on an arch, the kernel needs `pseudo-device efi`
and the MD EFI implementation needs to register its backend by calling
efi_ops_register(). This commit includes an implementation for Arm.

Remove unused arm_fdt_memory_dump

Add FIQ support.

Merge thorpej-cfargs2.

branches: 1.16.8;
Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

branches: 1.15.2;
Install a default irq handler that panics when no interrupt controller
driver is installed.

Rename of_match_compat_data() to of_compatible_match(). Similarly,
rename of_search_compatible() to of_compatible_lookup().

Standardize on of_compatible_match() for driver matching, and adapt
all call sites.

No need for PMAP_WRITE_BACK here (also aa32 pmap doesn't know about it)

branches: 1.12.2;
Support using EFI runtime services for RTC when booting in devicetree mode.

Add support for installing modules that were loaded by the bootloader.

Add a generic Arm64 platform definition that is used as a fallback.

The generic platform assumes PSCI, a generic timer, pre-initialized UART
clocks, and adds a 4KB entry to the devmap for the console UART device.

Remove unused variable

Add prefixes to struct arm_platform{,_info} members.

No functional change.

branches: 1.7.2; 1.7.4;
FDTise RapberryPI support. Thanks for jmcneill for a lot of help with this.

The kernel image that the RPI firmware boots is now netbsd.img in the
kernel build directory.

XXX fdtbus_get_reg needs reworking

branches: 1.6.2;
Spaces to TABs

branches: 1.5.2;
Add __HAVE_GENERIC_CPU_INITCLOCKS option. If set, don't export
cpu_initclocks from device drivers as common code (in this case FDT) will
provide its own copy.

Add arm_fdt_memory_dump helper for dumping physical addresses from ddb

branches: 1.3.2;
Use an FDT-based ARM_INTR_IMPL for Tegra.

Allow ARM FDT drivers to register per-cpu init callbacks. Run through this
callback list when a CPU hatches instead of calling gtmr_init_cpu_clock
directly.

Rename armv7fdt to armfdt now that bus space + dma tags are filled in by
platform code.

Rename ARM_PLATFORM to FDT_PLATFORM and make it available outside arm.

Remove unused arm_fdt_memory_dump

Add FIQ support.

Add support for installing modules that were loaded by the bootloader.

Add a generic Arm64 platform definition that is used as a fallback.

The generic platform assumes PSCI, a generic timer, pre-initialized UART
clocks, and adds a 4KB entry to the devmap for the console UART device.

Change ap_mpstart to return non-zero value if any/all APs don't start.

Remove unused variable

Add a link set for cpu enable methods.

Retire fdt_putchar and ap_early_put_char in favour of uartputc.

Provide generic start code that assumes the MMU is off and caches are
disabled as per the linux booting protocol for ARMv6 and ARMv7 boards.
u-boot image type should be changed to 'linux' for correct behaviour.

The new start code builds a minimal "bootstrap" L1PT with cached access
disabled and uses the same table for all processors. AP startup is
performed in less steps and more code is written in C.

The bootstrap tables and stack are placed into an (orphaned) section
"_init_memory" which is given to uvm when it is no longer used.

Various kernels have been converted to use this code and tested. Some
boards were provided by TNF. Thanks!

The GENERIC kernel now boots on boards using the TEGRA, SUNXI and EXYNOS
kernels. The GENERIC kernel will also work on RPI2 using u-boot.

Thanks to martin@ and aymeric@ for testing on parallella and nanosoc
respectively

Add optional ap_startup callback to struct arm_platform. This allows for
late (post-UVM init) initialization of platform specific stuff.

cleanup aarch64 mpstart and fdt bootstrap
* arm_cpu_hatch_arg is a bad idea. avoid serializing CPU startup, and eliminate arm_cpu_hatch_arg.
in mpstart, resolve own cpu index using array of cpu_mpidr[] (aarch64)
* add support fdt enable-method "spin-table"
* add support fdt enable-method "brcm,bcm2836-smp" (for 32bit RaspberryPi)
* use arm_fdt_cpu_bootstrap() instead of psci_fdt_bootstrap()
* rename "arm/fdt/psci_fdt.h" to "arm/fdt/psci_fdtvar.h" because of conflict of include file for needs-flag
* add devmap for cpu spin-table of raspberrypi3/aarch64
* no need to force hatch APs for raspberrypi3/arm32 ifndef MULTIPROCESSOR.
* fix to work pmap_extract(kerneltext/data/bss) even if before calling pmap_bootstrap

idea to use cpu_mpidr[] by jmcneill@. reviewd by skrll@. thanks.

Add prefixes to struct arm_platform{,_info} members.

No functional change.

branches: 1.7.2; 1.7.4; 1.7.6; 1.7.8;
Add __HAVE_GENERIC_CPU_INITCLOCKS option. If set, don't export
cpu_initclocks from device drivers as common code (in this case FDT) will
provide its own copy.

Add arm_fdt_memory_dump helper for dumping physical addresses from ddb

branches: 1.5.2;
Allow platform code to specify the UART frequency for consinit

FDT-ize "delay" by having fdt_machdep provide the delay() function and
move the implementations into the platform code.

Use an FDT-based ARM_INTR_IMPL for Tegra.

Allow ARM FDT drivers to register per-cpu init callbacks. Run through this
callback list when a CPU hatches instead of calling gtmr_init_cpu_clock
directly.

Rename armv7fdt to armfdt now that bus space + dma tags are filled in by
platform code.

Re-factor the console-related code into fdt_console.[ch]

Refactor the "platform" defitions into fdt_platform.h

Rename ARM_PLATFORM to FDT_PLATFORM and make it available outside arm.

Restore the ability to have EARLYCONS work for the QEMU virt after
SOC_VIRT got removed.

Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

branches: 1.4.2;
Call acpi_device_register() / fdtbus_device_register() as approrpriate.

branches: 1.3.2;
Get rid of a4x bus_space tag from fdtbus_attach_args. The only consumer
of this was various com(4) glue so modify all of that to use the new
com_init_regs_stride instead.

branches: 1.2.6;
Fix DEVMAP build losage by reducing diffs between arm and aarch64

*sigh*

Make the generic Arm platform available for arm32 as well.

Add a PCI resource manager and use it on Arm ACPI platforms.

The Arm ACPI code relied on PCI_NETBSD_CONFIGURE to configure devices that
were not enabled by system firmware. This is not safe to do unless the
firmware explicitly permits it using a device specific method defined in
the PCI firmware spec.

Introduce a new PCI resource manager that discovers what has already been
configured by firmware and allocates from the remaining space. This will
ensure that devices setup by firmware are untouched and only will program
BARs of devices that are not enabled at boot time.

The current implementation assumes that the parent PCI-PCI bridge's
are already configured. A worthwhile improvement in the future would be
to support programming windows for bridges that are not fully configured.

wsdisplay(4): Make most of struct vcons_data private.

More importantly, make sizeof(struct vcons_data) independent of
whether VCONS_DRAW_INTR &c. is defined.

Allocate the private space with kmem rather than in the caller.

This still doesn't have very good separation between interface
parameters and internal state, but it's better than before, and is
necessary to make genfb usable in modules.

In arm_simplefb.c, this removes use of the use_intr member. That
assignment became redundant with the introduction of vcons_earlyinit,
so there's no need to replace it by anything.

Add 10-bit pixel format support.

Fix previous: Each line is "stride" bytes wide, not "width * depth".

While here, add a comment explaining what this test is doing.

Sanity check size vs width x height x depth. Buggy firmware exists.

Rename of_match_compat_data() to of_compatible_match(). Similarly,
rename of_search_compatible() to of_compatible_lookup().

Standardize on of_compatible_match() for driver matching, and adapt
all call sites.

Fit in 80 columns. NFC.

Use vcons_earlyinit

fix build without VCONS_DRAW_INTR

branches: 1.4.2;
Fix build for some arm32 kernels; arm_simplefb_reconfig() is used
only when NPCI > 0 && defined(PCI_NETBSD_CONFIGURE).

Instead of trying to prevent pciconf from reconfiguring the firmware's
framebuffer, instead allow MD code to register callbacks. If a resource is
changed, the driver can unmap the old resource and remap the new. Do this
with simplefb so the console doesn't explode when the VGA device is
(potentially) reconfigured at boot.

Fix colors of 32-bpp raster console for evbarm/aarch64eb and armeb.

Most boards are configured to little-endian in initial, and switched
to big-endian after kernel is loaded. In this case, framebuffer seems
byte-swapped to CPU.

It is best to reconfigure framebuffer (as done recently for sunxi_mixer
by jmcneill), but in most cases, HW is incapable, or we just don't know
register bits to configure them.

Therefore, override "format" FDT property for "simple-framebuffer" to
let drivers know byte-order for 32-bpp framebuffer.

Then, make fdt/simplefb (genfb) and arm_simplefb (early console) detect
byte-swapped FB, and configure genfb(4) or rasops(4) layers accordingly.

Tested on Pine A64+ (arm_simplefb) and Cubietruck (both fdt/simplefb and
arm_simplefb).

Discussed with jmcneill. Thanks!!

Support early FB console attachment when booting with a devicetree
(non-ACPI mode). Inform the pciconf code about the framebuffer to
prevent pciconf from changing resources out from under us when framebuffer
memory is in VRAM.

Instead of trying to prevent pciconf from reconfiguring the firmware's
framebuffer, instead allow MD code to register callbacks. If a resource is
changed, the driver can unmap the old resource and remap the new. Do this
with simplefb so the console doesn't explode when the VGA device is
(potentially) reconfigured at boot.

Support early FB console attachment when booting with a devicetree
(non-ACPI mode). Inform the pciconf code about the framebuffer to
prevent pciconf from changing resources out from under us when framebuffer
memory is in VRAM.

Rename armv7fdt to armfdt now that bus space + dma tags are filled in by
platform code.

Move console initialization out of platform code into the console drivers
themselves.

Add a facility for platform-specific callbacks and use it to remove most
of the Tegra-specific code from tegra_machdep.c.

Platform code matches on the compatible property of the root ("/") DT node
and allows for chip-specific implementations of the following:

- devmap: Return a 0-terminated list of static device map entries.
- bootstrap: Early initialization of platform-specific facilities.
- early_putchar: Provides an implementation of putchar for use in early
debug messages.
- device_register: Platform-specific device register callback.
- reset: Platform-specific CPU reset implementation.
- consinit: Platform-specific console init implementation.

Enumerate CPUs, GIC, and generic timer using FDT data instead of relying
on hard-coded tables in mainbus.

Rename armv7fdt to armfdt now that bus space + dma tags are filled in by
platform code.

Move console initialization out of platform code into the console drivers
themselves.

Add a facility for platform-specific callbacks and use it to remove most
of the Tegra-specific code from tegra_machdep.c.

Platform code matches on the compatible property of the root ("/") DT node
and allows for chip-specific implementations of the following:

- devmap: Return a 0-terminated list of static device map entries.
- bootstrap: Early initialization of platform-specific facilities.
- early_putchar: Provides an implementation of putchar for use in early
debug messages.
- device_register: Platform-specific device register callback.
- reset: Platform-specific CPU reset implementation.
- consinit: Platform-specific console init implementation.

arm/fdt/cpu_fdt.c: Use `cpu' iattr to attach cpufreq.

Now that cpu has an explicit interface attribute, cpufeaturebus,
_all_ children of cpu must use an explicit interface attribute to
disambiguate. For children that weren't previously attached using an
explicit interface attribute, the name of the parent, `cpu', serves
as the iattr.

XXX I think we should either
(a) not use cpufreqbus, since in the aarch64 case it doesn't seem to
be passing any information through attach args, or
(b) create another iattr like cpufdtbus for use by cpufreq_dt.c,
which does rely on attach args, if it has to attach differently
from the rest of fdtbus.
But for now this should get aarch64 on fdt booting again.

kern/58195: arm: Support drvctl -d and -r for cpufeaturebus

This is required for detaching and re-attaching the vmt(4) driver on aarch64.

arm: Use device_set_private for cpuN.

For cpu at fdt, nix the fdt softc -- this was leaked and never used
for anything. The device's private storage is the cpu_info.

Inspect #address-cells to determine if the cpu-release-addr requires
a 32- or 64-bit write.

Merge thorpej-cfargs2.

branches: 1.39.8;
Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

branches: 1.38.2;
Provide and use a sev() macro for the sev instruction.

While here use the correct barrier to ensure completion of memory accesses
before a couple of the sev() calls.

Fix comment. Spotted by jmcneill@

branches: 1.36.2;
If enable-method is missing, try psci

Improve a comment

Various updates and improvements to cpu start up on arm/aarch64

- start sharing more code around the AP startup messaging.
- call arm_cpu_topology_set early so that ci_core_id is available for
drivers, e.g. bcm2835_intr.c
- both arm and aarch64 now have
- a static cpu_info_store array
- the same arm_cpu_{hatched,mbox}

Match any node with device_type = "cpu"

Wrap a long line

provide some semblance of valid cpu topology for big.little systems.

while attaching cpus, if the FDT provides "capacity-dmips-mhz" track
the fastest set, and call cpu_topology_set() with slow=true for any
cpus that are not the fastest.

bug fix for cpu_topology_set(): actually set ci_is_slow for slow cpus.

with this change, and -current's recent scheduler changes, this means
that long running processes run on the faster cores. on RK3399 based
systems, i am seeing 20-50% speed ups for many tasks.


XXX: all this can be made common with armv7 big.little.

branches: 1.30.2;
fix typos in comment in previous.

re-apply r1.26. but only #if !defined(AARCH64).

not necessary on armv8 and cache ops are not available that early there.

Increase aarch64 MAXCPUS to 256.

back out r1.26. it makes the pinebook fail to boot.

flush the dcache in cpu_enable_psci() before calling psci_cpu_on().

fixes the kernel hanging with multiple "mpstart" on (at least) NanoPi R1.

OK jmcneill@, skrll@

XXX pullup-9

branches: 1.25.4;
If an enable-method property is present on the cpu node and not supported
by the kernel, try to use the enable-method from the cpus node instead.

Fix build w/o PSCI

The spin-table CPU enable method is only valid for 64-bit kernels.

Change ap_mpstart to return non-zero value if any/all APs don't start.

Add support for (FDT-ized) Amlogic Meson8b.

No need to swap cpu-release-addr twice

Add a link set for cpu enable methods.

Start CPUs more like aarch64 by using a cpu_mpidr array (if populated)
to map MPIDRs to an index for each CPU.

Towards big.LITTLE support.

Avoid double negative

Provide generic start code that assumes the MMU is off and caches are
disabled as per the linux booting protocol for ARMv6 and ARMv7 boards.
u-boot image type should be changed to 'linux' for correct behaviour.

The new start code builds a minimal "bootstrap" L1PT with cached access
disabled and uses the same table for all processors. AP startup is
performed in less steps and more code is written in C.

The bootstrap tables and stack are placed into an (orphaned) section
"_init_memory" which is given to uvm when it is no longer used.

Various kernels have been converted to use this code and tested. Some
boards were provided by TNF. Thanks!

The GENERIC kernel now boots on boards using the TEGRA, SUNXI and EXYNOS
kernels. The GENERIC kernel will also work on RPI2 using u-boot.

Thanks to martin@ and aymeric@ for testing on parallella and nanosoc
respectively

fix to boot APs of RPI3 with GENERIC64.
if no psci, try other methods.

Wrap arm_fdt_cpu_okay with #ifdef MULTIPROCESSOR

Re-add support for cpu nodes with status = "disabled", lost in previous commit

cleanup aarch64 mpstart and fdt bootstrap
* arm_cpu_hatch_arg is a bad idea. avoid serializing CPU startup, and eliminate arm_cpu_hatch_arg.
in mpstart, resolve own cpu index using array of cpu_mpidr[] (aarch64)
* add support fdt enable-method "spin-table"
* add support fdt enable-method "brcm,bcm2836-smp" (for 32bit RaspberryPi)
* use arm_fdt_cpu_bootstrap() instead of psci_fdt_bootstrap()
* rename "arm/fdt/psci_fdt.h" to "arm/fdt/psci_fdtvar.h" because of conflict of include file for needs-flag
* add devmap for cpu spin-table of raspberrypi3/aarch64
* no need to force hatch APs for raspberrypi3/arm32 ifndef MULTIPROCESSOR.
* fix to work pmap_extract(kerneltext/data/bss) even if before calling pmap_bootstrap

idea to use cpu_mpidr[] by jmcneill@. reviewd by skrll@. thanks.

Ditch arm,arm-v8 compatible string (everything uses arm,armv8)

Match non-standard compat string "arm,armv8" (should be "arm,arm-v8")

add support multiple cpu clusters.
* pass cpu index as an argument to secondary processors when hatching.
* keep cpu cache confituration per cpu clusters.

Hello big.LITTLE!

Attach cpufreq scaling provider to ourself, as cpus doesn't do this anymore

branches: 1.7.2;
Match generic arm,arm-v8 compatible string

Add "arm,arm-v7" to compatible strings.

(for `qemu-system-arm -M virt`)

Add initial support for ARMv8 (AARCH64) (by nisimura@ and ryo@)

- sys/arch/evbarm64 is gone and integrated into sys/arch/evbarm. (by skrll@)
- add support fdt. evbarm/conf/GENERIC64 fdt (bcm2837,sunxi,tegra) based generic 64bit kernel config. (by skrll@, jmcneill@)

branches: 1.4.2;
FDTise RapberryPI support. Thanks for jmcneill for a lot of help with this.

The kernel image that the RPI firmware boots is now netbsd.img in the
kernel build directory.

XXX fdtbus_get_reg needs reworking

branches: 1.3.2;
Add support for arm,arm1176jzf-s

branches: 1.2.4;
Only try to attach to CPUs with the same cluster ID as the boot processor.

branches: 1.1.2;
Enumerate CPUs, GIC, and generic timer using FDT data instead of relying
on hard-coded tables in mainbus.

Call / define fdtbus_cpus_md_attach for platforms with cpus @ fdt.

The RISC-V binding here seems somewhat of an abuse, but it exists in
mainline linux.

Remove GIC_SPLFUNCS.

Make _splraise/_spllower/splx functions available to modules again.

Add FIQ support.

Increase max PIC sources

Bump PIX_MAXSOURCES to 480

branches: 1.3.2;
Bump PIC_MAXSOURCES to 352.

(`qemu-system-arm -M virt` currently needs 288)

branches: 1.2.2; 1.2.4; 1.2.6;
Add initial support for Allwinner A13 and R8 SoCs.

Use an FDT-based ARM_INTR_IMPL for Tegra.

Refactor the "platform" defitions into fdt_platform.h

Step towards modularizing the Flattened Device Tree code.

Define attributes for each of the specific device bindings: clock,
dai, dma, gpio, i2c, iommu, mbox, mmc_pwrseq, phy, power, power domain,
pwm, regulator, reset controller, spi, system controller, pin
controller. Include these support files only if either a provider
or consumer with one of these attributes is present in the kernel
config.

Add the necessary attributes to the device / attach declarations for
each provider and consumer.

There are some bindings that are consumed by generic code (iommu, pinctrl,
power, power domain). Provide weak stubs for these routines to handle
situations where there is no provider.

No actual code changed; NFCI.

branches: 1.35.8;
Call / define fdtbus_cpus_md_attach for platforms with cpus @ fdt.

The RISC-V binding here seems somewhat of an abuse, but it exists in
mainline linux.

Expose SMBIOS tables using sysctl machdep.dmi.*, same as x86.

armfdt does not need its own interface attribute; all of its children
attach to the "fdt" interface attribute.

branches: 1.32.6;
Support early FB console attachment when booting with a devicetree
(non-ACPI mode). Inform the pciconf code about the framebuffer to
prevent pciconf from changing resources out from under us when framebuffer
memory is in VRAM.

arm_platform requires gtmr and psci. Should fix build failures.

Make the generic Arm platform available for arm32 as well.

Add a driver for the A5/A9 Private timer.

While here FDTise the Watchdog driver.

branches: 1.28.4;
Split armv7/armv8 tprof backend config logic from the fdt bus glue.

Add acpi @ fdt glue

Centralise defparam CONSADDR, CONSPEED, CONMODE and CONADDR into
opt_console.h and adjust.

cleanup aarch64 mpstart and fdt bootstrap
* arm_cpu_hatch_arg is a bad idea. avoid serializing CPU startup, and eliminate arm_cpu_hatch_arg.
in mpstart, resolve own cpu index using array of cpu_mpidr[] (aarch64)
* add support fdt enable-method "spin-table"
* add support fdt enable-method "brcm,bcm2836-smp" (for 32bit RaspberryPi)
* use arm_fdt_cpu_bootstrap() instead of psci_fdt_bootstrap()
* rename "arm/fdt/psci_fdt.h" to "arm/fdt/psci_fdtvar.h" because of conflict of include file for needs-flag
* add devmap for cpu spin-table of raspberrypi3/aarch64
* no need to force hatch APs for raspberrypi3/arm32 ifndef MULTIPROCESSOR.
* fix to work pmap_extract(kerneltext/data/bss) even if before calling pmap_bootstrap

idea to use cpu_mpidr[] by jmcneill@. reviewd by skrll@. thanks.

Add FDT generic PCI host controller driver.

Whitespace

Add GICv3 FDT glue

Add support for ARMv7 performance monitor (PMU).

Add glue for ARMv8 performance monitor (PMU).

cpus: use fdt_add_bus

Allow nodes to attach child devices using the same sorting rules as used
by the simplebus driver.

branches: 1.17.2;
Add l2cc support.

Rename ARM A9 Global Timer driver name to support fdt.

- Rename a9tmr to arma9tmr.
- Add a9tmr_fdt.c based gtmr_fdt.c.

branches: 1.15.2;
move plfb glue to the correct location

branches: 1.14.2;
Add generic DT cpu frequency and voltage scaling driver.

Until config supports multiple 'attach driver at bus with <foo>' lines,
move plfb from common files.fdt to files.vexpress

Add support for ARM Power State Coordination Interface (PSCI).

Add fdt glue for plrtc

Add fdt glue for ARM PrimeCell Advanced Audio CODEC interface (PL041).

branches: 1.9.2;
Add and enable FDT glue for ARM PrimeCell PL050 (KMI) PS2 keyboard/mouse
interface.

Add driver for ARM PrimeCell Color LCD controller (PL111).

Add fdt glue for ARM PrimeCell UART (PL011).

Add fdt glue for ARM PrimeCell Multimedia Card Interface (MMCI).

Add fdt glue for SMSC LAN9118 ethernet.

Fix VERBOSE_INIT_ARM build with TEGRA kernel.

Rename armv7fdt to armfdt now that bus space + dma tags are filled in by
platform code.

Enumerate CPUs, GIC, and generic timer using FDT data instead of relying
on hard-coded tables in mainbus.

branches: 1.1.2;
fdt glue for gic

Fix attachment for GICs above 4GB

branches: 1.25.10;
gic at fdt: Don't assume all irqs are established on disestablish.

Fixes panic on detach of PCI devices on pcihost.

make compilable at NPCI==0

Merge thorpej-cfargs2.

branches: 1.22.8;
Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

branches: 1.21.2;
Rename of_match_compat_data() to of_compatible_match(). Similarly,
rename of_search_compatible() to of_compatible_lookup().

Standardize on of_compatible_match() for driver matching, and adapt
all call sites.

Add 'const char *xname' arg to fdtbus_interrupt_controller_func .establish

Fix off-by-one when printing the range of SPIs in a GICv2m frame

branches: 1.18.8;
Remove unnecessary cast and wrap a long line.

Fixed compile error.

Define constants for representing the standard interrupt types
({pos,neg,double}-edge, {high,low}-level) from the FDT "interrupts"
bindings. Use these defined constants rather than magic numbers.

Only attach v2m if PCI support is present

Add GICv2m support

Rename min/max -> uimin/uimax for better honesty.

These functions are defined on unsigned int. The generic name
min/max should not silently truncate to 32 bits on 64-bit systems.
This is purely a name change -- no functional change intended.

HOWEVER! Some subsystems have

#define min(a, b) ((a) < (b) ? (a) : (b))
#define max(a, b) ((a) > (b) ? (a) : (b))

even though our standard name for that is MIN/MAX. Although these
may invite multiple evaluation bugs, these do _not_ cause integer
truncation.

To avoid `fixing' these cases, I first changed the name in libkern,
and then compile-tested every file where min/max occurred in order to
confirm that it failed -- and thus confirm that nothing shadowed
min/max -- before changing it.

I have left a handful of bootloaders that are too annoying to
compile-test, and some dead code:

cobalt ews4800mips hp300 hppa ia64 luna68k vax
acorn32/if_ie.c (not included in any kernels)
macppc/if_gm.c (superseded by gem(4))

It should be easy to fix the fallout once identified -- this way of
doing things fails safe, and the goal here, after all, is to _avoid_
silent integer truncations, not introduce them.

Maybe one day we can reintroduce min/max as type-generic things that
never silently truncate. But we should avoid doing that for a while,
so that existing code has a chance to be detected by the compiler for
conversion to uimin/uimax without changing the semantics until we can
properly audit it all. (Who knows, maybe in some cases integer
truncation is actually intended!)

Return the real interrupt handle from gic_fdt_establish

Make IRQ sharing work again

branches: 1.10.2;
Support Cortex-A9 (addr_d > addr_c).

more completely gic_fdt_disestablish() such that it's possible to
re-establish later

branches: 1.8.2; 1.8.4;
Handle NULL arg interrupt handlers that want the clock frame.

Disallow sharing between MPSAFE and non-MPSAFE handlers.

Don't allow sharing edge and level triggered interrupts.

Support interrupt sharing.

branches: 1.4.2;
Use an FDT-based ARM_INTR_IMPL for Tegra.

Enumerate CPUs, GIC, and generic timer using FDT data instead of relying
on hard-coded tables in mainbus.

FDT: Interrupts -- add support for interrupt maps

The mct on exynos uses an interrupt map so we add support now. Devices
represent their interrupts either through a combination of interrupt-parent
and interrupts properties, where the 'interrupts' property is an array of
one or more interrupt specifiers; or through a combination of an
interrupt-parent that points to an interrupt-map, where the interrupt-map
contains 2 or more entries consisting of an index, a pointer to an
interrupt-controller, and a specifier for that controller.

This code adds the ability to walk the interrupt-map and return a specifier.
Unfortunately, the addition requires changing the interface to the
interrupt-controllers' _establish and _intstr functions, so this check in
contains a rototill of the three existing fdt interrupt controllers to use
the new interface.

branches: 1.1.2;
fdt glue for gic

gicv3: add support for mbi-alias property

The mbi-alias property, if present, contains the base address of a GICD
alias frame that contains only SET/CLRSPI registers. Use this instead of
the GICD register frame if present.

Rename of_match_compat_data() to of_compatible_match(). Similarly,
rename of_search_compatible() to of_compatible_lookup().

Standardize on of_compatible_match() for driver matching, and adapt
all call sites.

Use DEVICE_COMPAT_EOL.

Since we're using designated initialisers for compat data, we should
use a completely empty initializer for the sentinel.

Use device_compatible_entry / of_search_compatible() for the GICv3
quirk table.

Add 'const char *xname' arg to fdtbus_interrupt_controller_func .establish

Add support for message-based interrupts.

Improve detection of NS vs S views of priorities.

For PMR, write a 0 to bit7 and see if it sticks. This is only possible from
NS EL1 if we have a non-secure view of ICC_PMR_EL1.

For int priorities (GICD/GICR interfaces and LPIs), assume that the
GICD_CTLR.DS bit is telling us the truth.

RK3399 is special here when using the vendor bootloader, so keep the
auto-detection from the previous commit but limit the scope to only run
on RK3399 SOCs.

branches: 1.8.10;
Fixed compile error.

branches: 1.7.4;
Define constants for representing the standard interrupt types
({pos,neg,double}-edge, {high,low}-level) from the FDT "interrupts"
bindings. Use these defined constants rather than magic numbers.

attach GICv3 ITS where applicable

avoid NULL deref in gicv3_fdt_disestablish()

Initialize gic softc dma tag

Stop searching for redistributors in a region after we find a redistributor
with the Last bit set in GICR_TYPER.

branches: 1.2.2;
Use aprint_debug for redist count print

Add GICv3 FDT glue

gtmr: Add support for arm,cpu-registers-not-fw-configured property.

On armv7, arm,cpu-registers-not-fw-configured means that firmware hasn't
bothered to configure any generic timer registers and we need to
initialize cntfrq ourselves.

Merge thorpej-cfargs2.

branches: 1.10.8;
Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

branches: 1.9.2;
Rename of_match_compat_data() to of_compatible_match(). Similarly,
rename of_search_compatible() to of_compatible_lookup().

Standardize on of_compatible_match() for driver matching, and adapt
all call sites.

use fdtbus_intr_establish_xname

branches: 1.7.2; 1.7.18;
typo

When attaching gtmr at fdt use fdtbus_intr_establish to establish the
gtmr interrupt.

branches: 1.5.2;
Add __HAVE_GENERIC_CPU_INITCLOCKS option. If set, don't export
cpu_initclocks from device drivers as common code (in this case FDT) will
provide its own copy.

Match arm,armv8-timer compat string

Use an FDT-based ARM_INTR_IMPL for Tegra.

Allow ARM FDT drivers to register per-cpu init callbacks. Run through this
callback list when a CPU hatches instead of calling gtmr_init_cpu_clock
directly.

Enumerate CPUs, GIC, and generic timer using FDT data instead of relying
on hard-coded tables in mainbus.

Merge thorpej-cfargs2.

branches: 1.4.8;
Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

branches: 1.3.2;
Rename of_match_compat_data() to of_compatible_match(). Similarly,
rename of_search_compatible() to of_compatible_lookup().

Standardize on of_compatible_match() for driver matching, and adapt
all call sites.

branches: 1.2.12;
Add support for (FDT-ized) Amlogic Meson8b.

branches: 1.1.2; 1.1.4;
Add l2cc support.

Trailing whitespace.

Use "non-posted" instead of "strongly ordered" to describe nGnRnE mappings

Rename the following defines:
- _ARM_BUS_SPACE_MAP_STRONGLY_ORDERED to BUS_SPACE_MAP_NONPOSTED
- PMAP_DEV_SO to PMAP_DEV_NP
- LX_BLKPAG_ATTR_DEVICE_MEM_SO to LX_BLKPAG_ATTR_DEVICE_MEM_NP
Rename the following option:
- AARCH64_DEVICE_MEM_STRONGLY_ORDERED to AARCH64_DEVICE_MEM_NONPOSTED

pcihost: Track MSI/MSI-X interrupt handlers.

Track the MSI/MSI-X interrupt handlers so that fdtbus_intr_disestablish
doesn't get called for them.

This avoids a KASSERT firing when using 'drvctl -d' on a pci device that
uses MSI/MSI-X interrupts.

Revert previous

kern/56994: wm(4) panic on attach in interrupt_distribute, sometimes

pcihost: Don't call fdtbus_intr_disestablish for MSI/MSI-X interrupts.

This avoids a KASSERT firing when using 'drvctl -d' on a pci device that
uses MSI/MSI-X interrupts.

Process "ranges" property even when linux,pci-probe-only is set.

When the linux,pci-probe-only flag is set, we still need to process the
ranges property to determine whether or not to set PCI_FLAGS_IO_OKAY and
PCI_FLAGS_MEM_OKAY flags on the bus.

Instead of requiring drivers to be explicit about their device memory
mapping requirements, move this decision into the fdt layer. This
introduces a new MD function, fdtbus_bus_tag_create, which is responsible
for returning per-node bus_space handles.

Merge thorpej-cfargs2.

branches: 1.25.4;
Pass along our device handle to the PCI bus instance we attach.

branches: 1.24.2; 1.24.4;
Merge thorpej-cfargs branch:

Simplify and make extensible the config_search() / config_found() /
config_attach() interfaces: rather than having different variants for
which arguments you want pass along, just have a single call that
takes a variadic list of tag-value arguments.

Adjust all call sites:
- Simplify wherever possible; don't pass along arguments that aren't
actually needed.
- Don't be explicit about what interface attribute is attaching if
the device only has one. (More simplification.)
- Add a config_probe() function to be used in indirect configuiration
situations, making is visibly easier to see when indirect config is
in play, and allowing for future change in semantics. (As of now,
this is just a wrapper around config_match(), but that is an
implementation detail.)

Remove unnecessary or redundant interface attributes where they're not
needed.

There are currently 5 "cfargs" defined:
- CFARG_SUBMATCH (submatch function for direct config)
- CFARG_SEARCH (search function for indirect config)
- CFARG_IATTR (interface attribte)
- CFARG_LOCATORS (locators array)
- CFARG_DEVHANDLE (devhandle_t - wraps OFW, ACPI, etc. handles)

...and a sentinel value CFARG_EOL.

Add some extra sanity checking to ensure that interface attributes
aren't ambiguous.

Use CFARG_DEVHANDLE in MI FDT, OFW, and ACPI code, and macppc and shark
ports to associate those device handles with device_t instance. This
will trickle trough to more places over time (need back-end for pre-OFW
Sun OBP; any others?).

branches: 1.23.2;
Rename of_match_compat_data() to of_compatible_match(). Similarly,
rename of_search_compatible() to of_compatible_lookup().

Standardize on of_compatible_match() for driver matching, and adapt
all call sites.

Use DEVICE_COMPAT_EOL.

Since we're using designated initialisers for compat data, we should
use a completely empty initializer for the sentinel.

Remove "struct of_compat_data" and replace its usage with
"struct device_compatible_entry"; they are ABI-compatible.

Fix several "loses const qualifier" bugs encountered during
this conversion.

add fdtbus_intr_establish_xname() function

branches: 1.18.2;
Read the linux,pci-probe-only property from the /chosen node, not the PCI host controller node

Overhaul the interface to pci_configure_bus():
- Don't expose how PCI bus configuration resource management is implemented.
Provide a new resource provider API:

==> pciconf_resource_init() -- Initialize a PCI configuration resources
container.
==> pciconf_resource_add() -- Add a PCI configuration resource to the
container (I/O, MEM, or prefetchable MEM). Multiple resources of
each type may be added.
==> pciconf_resource_fini() -- Tear down the PCI configurtation resources
container once the bus has been configured.

This is much easier to use than the previous method of providing an
extent map for each kind of resource, and works better for e.g. ACPI
platforms that provide potentially multiple PCI resources in tables
provided by firmware.

- Re-implement PCI configuration resource management using vmem arenas,
rather than extent maps.

replace EX_NOWAIT with EX_WAITOK in device attach methods.
remove checks for failures that can no longer occur.

Fix arm __HAVE_PREEMPTION build

__HAVE_PREEMPTION requires TPIDRPRW_IS_CURLWP and curcpu is defined as

#define curcpu() lwp_getcpu(_curlwp())

oops more KNF

KNF

Do not use Early Write Acknowledge for PCIe I/O and config space.

branches: 1.11.2;
Use ARM_PCI_INTR_* definitions from pci_machdep.h instead of own copies

Support configuring ranges where only prefetchable memory is defined

Enable RK3399 PCIe.

branches: 1.8.4;
Split up the initialization of pcihost_fdt so we can borrow and override
its innards in an upcoming driver.

Implement support for IO space, and better-handle both variants of MMIO space.

Clear PCI_FLAGS_IO_OKAY as we don't support it yet.

make pcihost_intr_evcnt static, like the other functions

Add intr_establish_xname support to arm and expose it to intrctl

Add MSI/MSI-X support.

branches: 1.2.2;
Take interrupt-map-mask into consideration when mapping PCI interrupts.

Add FDT generic PCI host controller driver.

pcihost: Track MSI/MSI-X interrupt handlers.

Track the MSI/MSI-X interrupt handlers so that fdtbus_intr_disestablish
doesn't get called for them.

This avoids a KASSERT firing when using 'drvctl -d' on a pci device that
uses MSI/MSI-X interrupts.

Instead of requiring drivers to be explicit about their device memory
mapping requirements, move this decision into the fdt layer. This
introduces a new MD function, fdtbus_bus_tag_create, which is responsible
for returning per-node bus_space handles.

Do not use Early Write Acknowledge for PCIe I/O and config space.

branches: 1.2.2;
Enable RK3399 PCIe.

branches: 1.1.4;
Split up the initialization of pcihost_fdt so we can borrow and override
its innards in an upcoming driver.

Re-factor the console-related code into fdt_console.[ch]

Add support for FIFOs and hardware flow-control to plcom driver.
Add a PLCOM_TYPE_GENERIC_UART variant to match SBSA requirements.

Rename of_match_compat_data() to of_compatible_match(). Similarly,
rename of_search_compatible() to of_compatible_lookup().

Standardize on of_compatible_match() for driver matching, and adapt
all call sites.

use fdtbus_intr_establish_xname

branches: 1.3.12;
Fix blank line printed at attach on ACPI

Print interrupt info

branches: 1.1.6; 1.1.10; 1.1.12; 1.1.14;
Add fdt glue for ARM PrimeCell UART (PL011).

Re-factor the console-related code into fdt_console.[ch]

Rename of_match_compat_data() to of_compatible_match(). Similarly,
rename of_search_compatible() to of_compatible_lookup().

Standardize on of_compatible_match() for driver matching, and adapt
all call sites.

branches: 1.4.10;
Add support for WSDISPLAY_MULTICONS

If panel timings are missing, assume 800x600

branches: 1.2.4; 1.2.6; 1.2.10;
Allow plfb to be the console device

branches: 1.1.2;
Add driver for ARM PrimeCell Color LCD controller (PL111).

Rename of_match_compat_data() to of_compatible_match(). Similarly,
rename of_search_compatible() to of_compatible_lookup().

Standardize on of_compatible_match() for driver matching, and adapt
all call sites.

use fdtbus_intr_establish_xname

branches: 1.1.6; 1.1.10; 1.1.26;
Add and enable FDT glue for ARM PrimeCell PL050 (KMI) PS2 keyboard/mouse
interface.

Rename of_match_compat_data() to of_compatible_match(). Similarly,
rename of_search_compatible() to of_compatible_lookup().

Standardize on of_compatible_match() for driver matching, and adapt
all call sites.

use fdtbus_intr_establish_xname

branches: 1.2.10;
Print interrupt details

branches: 1.1.6; 1.1.10; 1.1.14;
Add fdt glue for ARM PrimeCell Multimedia Card Interface (MMCI).

Garbage-collect fdtbus_todr_attach(); todr_attach() does all the
necessary work now.

kern/59630

Rename of_match_compat_data() to of_compatible_match(). Similarly,
rename of_search_compatible() to of_compatible_lookup().

Standardize on of_compatible_match() for driver matching, and adapt
all call sites.

branches: 1.1.2; 1.1.6; 1.1.8; 1.1.24;
Add fdt glue for plrtc

armpmu(4): Add missing newline to error message.

fdt/pmu was not working. do return only if there is an error.

Improve error handling.

Hypervisors can return a PMCR.N of 0.

No longer need to call arm_pmu_init on all CPUs.

Rename of_match_compat_data() to of_compatible_match(). Similarly,
rename of_search_compatible() to of_compatible_lookup().

Standardize on of_compatible_match() for driver matching, and adapt
all call sites.

use fdtbus_intr_establish_xname

branches: 1.6.10;
Add support for multiple PMUs

branches: 1.5.4;
Use ci_{package,core,smt}_id instead of ci_data.cpu_{package,core,smt}_id

NFC

Only attempt to set interrupt affinity if we have more than one IRQ.

branches: 1.3.2;
aarch64 build fix

Add support for ARMv7 performance monitor (PMU).

Add glue for ARMv8 performance monitor (PMU).

Arm: Add support for SMC Calling Convention

Arm DEN0028 defines a calling mechanism used with Secure Monitor Call (SMC)
and Hypervisor Call (HVC) instructions. To discover SMCCC, we must:

1) Find the PSCI conduit (either via ACPI FADT, or Device Tree)
2) Use PSCI_VERSION to determine whether PSCI_FEATURES is supported
3) Call PSCI_FEATURES with SMCCC_VERSION to determine the implementation
version.

Rename of_match_compat_data() to of_compatible_match(). Similarly,
rename of_search_compatible() to of_compatible_lookup().

Standardize on of_compatible_match() for driver matching, and adapt
all call sites.

branches: 1.19.12;
KNF

cleanup aarch64 mpstart and fdt bootstrap
* arm_cpu_hatch_arg is a bad idea. avoid serializing CPU startup, and eliminate arm_cpu_hatch_arg.
in mpstart, resolve own cpu index using array of cpu_mpidr[] (aarch64)
* add support fdt enable-method "spin-table"
* add support fdt enable-method "brcm,bcm2836-smp" (for 32bit RaspberryPi)
* use arm_fdt_cpu_bootstrap() instead of psci_fdt_bootstrap()
* rename "arm/fdt/psci_fdt.h" to "arm/fdt/psci_fdtvar.h" because of conflict of include file for needs-flag
* add devmap for cpu spin-table of raspberrypi3/aarch64
* no need to force hatch APs for raspberrypi3/arm32 ifndef MULTIPROCESSOR.
* fix to work pmap_extract(kerneltext/data/bss) even if before calling pmap_bootstrap

idea to use cpu_mpidr[] by jmcneill@. reviewd by skrll@. thanks.

Boot APs with status "disabled" if they have an enable-method property

Fix previous; PSCI_CPU_ON requires an MPIDR!

add support multiple cpu clusters.
* pass cpu index as an argument to secondary processors when hatching.
* keep cpu cache confituration per cpu clusters.

Hello big.LITTLE!

/cpus node may have any nodes except cpu. count only nodes of device_type "cpu"

Need to use fdtbus_get_reg64 for mpidr

Provide and use cpu_mpidr_aff_read in psci_fdt_bootstrap

Pass full mpidr (instead of just aff0) to psci_cpu_on

Add missing pointer <-> integer casts
Use PRI?64 to print uint64_t instead 'll?'

Fix non-MULTIPROCESSOR build

Fix arm32 build

Add aarch64 support.

Switch to PSCI 0.1 mode only if the first compatible string listed on /psci is "arm,psci"

branches: 1.5.2;
Fix PSCI 0.1 detection.

Export a psci_fdt_reset function, usable from FDT platform code.

branches: 1.3.2; 1.3.4;
Use PSCI for reset and poweroff when available.

branches: 1.2.2;
Wrap MP-specific code in ifdef MULTIPROCESSOR

branches: 1.1.4;
Add support for ARM Power State Coordination Interface (PSCI).

cleanup aarch64 mpstart and fdt bootstrap
* arm_cpu_hatch_arg is a bad idea. avoid serializing CPU startup, and eliminate arm_cpu_hatch_arg.
in mpstart, resolve own cpu index using array of cpu_mpidr[] (aarch64)
* add support fdt enable-method "spin-table"
* add support fdt enable-method "brcm,bcm2836-smp" (for 32bit RaspberryPi)
* use arm_fdt_cpu_bootstrap() instead of psci_fdt_bootstrap()
* rename "arm/fdt/psci_fdt.h" to "arm/fdt/psci_fdtvar.h" because of conflict of include file for needs-flag
* add devmap for cpu spin-table of raspberrypi3/aarch64
* no need to force hatch APs for raspberrypi3/arm32 ifndef MULTIPROCESSOR.
* fix to work pmap_extract(kerneltext/data/bss) even if before calling pmap_bootstrap

idea to use cpu_mpidr[] by jmcneill@. reviewd by skrll@. thanks.

branches: 1.2.2;
Export a psci_fdt_reset function, usable from FDT platform code.

branches: 1.1.4; 1.1.6; 1.1.8; 1.1.10;
Add support for ARM Power State Coordination Interface (PSCI).

branches: 1.1.2; 1.1.6;
cleanup aarch64 mpstart and fdt bootstrap
* arm_cpu_hatch_arg is a bad idea. avoid serializing CPU startup, and eliminate arm_cpu_hatch_arg.
in mpstart, resolve own cpu index using array of cpu_mpidr[] (aarch64)
* add support fdt enable-method "spin-table"
* add support fdt enable-method "brcm,bcm2836-smp" (for 32bit RaspberryPi)
* use arm_fdt_cpu_bootstrap() instead of psci_fdt_bootstrap()
* rename "arm/fdt/psci_fdt.h" to "arm/fdt/psci_fdtvar.h" because of conflict of include file for needs-flag
* add devmap for cpu spin-table of raspberrypi3/aarch64
* no need to force hatch APs for raspberrypi3/arm32 ifndef MULTIPROCESSOR.
* fix to work pmap_extract(kerneltext/data/bss) even if before calling pmap_bootstrap

idea to use cpu_mpidr[] by jmcneill@. reviewd by skrll@. thanks.

Add a shared function to query the common properties used for configuring
an Ethernet address.

Rename of_match_compat_data() to of_compatible_match(). Similarly,
rename of_search_compatible() to of_compatible_lookup().

Standardize on of_compatible_match() for driver matching, and adapt
all call sites.

use fdtbus_intr_establish_xname

branches: 1.2.8;
Match smsc,lan9115 and honour local-mac-address/mac-address properties

branches: 1.1.6; 1.1.10; 1.1.14; 1.1.18;
Add fdt glue for SMSC LAN9118 ethernet.