Refactor the "platform" defitions into fdt_platform.h

Rename ARM_PLATFORM to FDT_PLATFORM and make it available outside arm.

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

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.

branches: 1.1.2; 1.1.6;
Add dma-ranges support.

Use device_{get,set}prop_bool() for "is_console".

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

Refactor the "platform" defitions into fdt_platform.h

arm64: Add a gross hack to allow handoff from genfb to PCI DRM drivers.

Similar to how this is handled on x86.

fdt: Add a fp_device_register_post_config callback to fdt_platform.

branches: 1.107.2;
Make fdt_cpu_rootconf available for other machines/platforms.

avoid comparing arrays directly, compare the address of their first element.

found by GCC 12.

fdt(4): Factor out bootargs support from evbarm and riscv.

Factor out some fdt(4) features from {,evb}arm into dev/fdt.

Now, FDT-based support to efirt, initrd, rndseed, and efirng can be
used from, e.g., riscv.

Mostly from Nick Hudson.

XXX
As Nick comments, there can be some optimizations for fdt_map_range().
efiboot may also be modified to load these objects into aligned PAs.

Move fdt_update_stdout_path from evbarm code to MI code

Rename ARM_PLATFORM to FDT_PLATFORM and make it available outside arm.

Locate wedges as boot device and also match a partition GUID.

fix root detection on evbarm when raid is involved

there are several problems solved in this change:
- lots of work was re-done when we already have determined the
device booted from, so several new early returns introduced
if booted_device has been set
- due to the lack of cpu_bootconf(), raidframe softroot would
override "root=xxx" on the boot command line (note that
platforms that use eg, device_register() to detect the boot
device are not affected by this issue as they find the
boot device much earlier.)
- in the new cpu_bootconf(), switch the order of the platform
boot-config with the set_root_device() call. this avoids a
problem where "root=xxx" is checked after automated methods,
and is thus ignored.
- in fdt_detect_root_device(), remove the code to add "root=xxx""
string to the boot_args[] that would be later parsed by the
set_root_device() call, and simply set booted_device and, for
mbr installs, booted_partition directly. also, for any
successful call, perform an early return.
- define __HAVE_CPU_BOOTCONF so early boot calls cpu_bootconf().


tested on:
- rockpro64 booting from emmc, sata (big, and little endian)
- rockpro64 loading kernel from msdos partition
- rockpro64 booting from network (fails to auto-detect, with or
without this change)
- quartz64 booting from nvme
- lx2k booting from nvme

XXX: pullup-10

branches: 1.99.2;
Size boot_physmem with FDT_MEMORY_RANGES.

This effectively increases the size from 64 to 256 entries for Arm kernels.
It turns out on large systems that memory can be quite fragmented by UEFI.
Increasing the size of this just kicks the can down the road, we need a
better solution to deal with boot_physmem/fdt_memory/bootparams.dram
sizing.

Fix build after previous.

Remove an empty line

Move the fdt_memory_remove_reserved call out of fdt_build_bootconfig

NFC.

Actually release the VA in fdt_unmap_range

KNF

KNF

Typo in comment

Update to support EFI runtime outside the kernel virtual address space
by creating an EFI RT pmap that can be activated / deactivated when
required.

Adds support for EFI RT to ARM_MMU_EXTENDED (ASID) 32-bit Arm machines.

On Arm64 the usage of pmapboot_enter is reduced and the mappings are
created much later in the boot process -- now in cpu_startup_hook.
Backward compatiblity for KVA mapped RT from old bootaa64.efi is
maintained.

Adding support to other platforms should be easier as a result.

Fix locking after opendisk(), VOP_IOCTL() needs an unlocked vnode,
vn_rdwr() needs flag IO_NODELOCKED.

Improve a VPRINTF

in fdt_cpu_rootconf(), return without doing anything (like setting
"root=something" in boot_args, or booted_device), if booted_device
is already set to something.

this makes raidframe softroot work on evbarm.

earlyconsgetc: return -1 instead of 0 because we will never produce input

Add a comment

Make EFI_RUNTIME compile on arm

KNF

Move evbarm/fdt/fdt_memory.[ch] to sys/dev/fdt and simplify the api and
some operations. This allows other architectures to use it.

evbarm: Bump efirng entropy estimate.

I'm not really happy with this, but my lack of confidence in the
remaining question marks about this (no real documentation about the
underlying physical processes, and a slightly self-inconsistent uefi
spec) is outweighed by the value of not distracting people with
entropy warnings on systems that are almost certainly fine.

Style around setting the physical memory limit. NFCI.

Tweak a comment

Simplify. NFCI.

Print the devmap we're using in the debug output

branches: 1.77.2;
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.

Add a newline

Make sure we pass full pages to fdt_memory_remove_range

Fix build on arm

Free kva for rndseed and efirng when done.

The physical pages remain forever reserved because it's not convenient
to unreserve them at the moment after we reserved them during
fdt_build_bootconifg, but it's just two pages so not that big a deal.

Deduplicate address-range querying/mapping logic.

Teach arm fdt kernel to use /chosen/netbsd,efirng data.

Feed it in as a separate random source, with zero entropy since this
is a best-effort fallback for devices we really don't know anything
about.

Fix LOCKDEBUG by calling fdtbus_intr_init as part of cpu_startup_hook, i.e.
later.

Rename fdtbus_set_data() to fdtbus_init(). NFC.

Switch aarch64 to use a single freelist.

branches: 1.65.2;
Implement rndseed support in efiboot and fdt arm.

The EFI environment variable `rndseed' specifies the path to the
random seed. It is loaded only for fdt platforms at the moment.

Since the rndseed (an rndsave_t object as defined in <sys/rndio.h>)
is 536 bytes long (for hysterical raisins), and to avoid having to
erase parts of the fdt tree, we load it into a physical page whose
address is passed in the fdt tree, rather than passing the content of
the file as an fdt node directly; the kernel then reserves the page
from uvm, and maps it into kva to call rnd_seed.

For now, the only kernel that does use efiboot with fdt is evbarm,
which knows to handle the rndseed. Any new kernels that use efiboot
with fdt must do the same; otherwise uvm may hand out the page with
the secret key on it for a normal page allocation in the kernel --
which should be OK if there are no kernel memory disclosure bugs, but
would lead to worse consequences than simply loading the seed late in
userland with /etc/rc.d/random_seed otherwise.

ok jmcneill

branches: 1.64.2;
Consistently use vaddr_t as initarm and friends return type.

Makes no difference to binaries except for aarch64 where it's required

Fix and improve a VPRINTF

In fdt_add_boot_physmem make sure the memory range has pages available
before adding it to the fdt_physmem array.

Fixes a problem that jmcneill@ pointed out to me.

Make fdt_get_memory return all of physical memory on ARM (matching ARM64 behavior)

Spell common correctly in comment. Spotted by jmcneill

Flush the BP cache just before starting APs so that cache coherency starts
with a correct view.

Only free the _init_memory pages if all APs start corectly.

Appease clang. Tested by roy.

support boot option "-1" to disable multiprocessor boot, and "-z" to set AB_SILENT flag.

If the bootloader specifies a boot mac-address, use it to find the root device.

Less is more

Add support for auto-selection of GPT root devices

Use PRIx64 to print uint64_t

Setup mappings for EFI runtime mmio ranges.

Fix VERBOSE_INIT_ARM build

Replace extent(9) with our own code to deal with adding and reserving
memory ranges.

Retire fdt_putchar and ap_early_put_char in favour of uartputc.

If a /chosen/framebuffer node is found, reserve physical memory claimed
by it.

Add support for EFI runtime services on aarch64.

Revert a VPRINTF to printf

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

Use __nothing

don't call plat->ap_early_putchar if not defined EARLYCONS

If the total size of the DTB exceeds our static storage, attempt to pack
it in place to make it fit.

Increase storage space for DTB (for QEMU)

Don't call ukbd_cnattach() unconditionally, this causes a non-functionnal
keyboard if there is a framebuffer but the console is serial only.
Instead add a fdt_device_register_post_config() callback, which checks
if the just-attached wsdisplay is the console, and calls ukbd_cnattach()
in this case.
OK jmcneill@

Use fdt_open_into instead of fdt_move to load the DTB since we may make
changes to the tree after loading it. When we are done making changes,
call fdt_pack.

Use do { } while (/* CONSTCOND */ 0) for nop VPRINTF

fdt_cpu_rootconf: fix root on wd(4)

Remove duplicate 'ld' and replace with previously-missing 'wd'.

Increase MAX_PHYSMEM to 64

When the root= boot arg is missing, attempt to autodetect the root device
by comparing a hash of a disk device's MBR with the hash passed in from
the bootloader.

Deal with reserved memory ranges that start before mem start

Add prefixes to struct arm_platform{,_info} members.

No functional change.

Refactor code to split aarch{32,64} kernel page tables and VM setup. This
will help re-build the kernel page tables on aarch64 with correct section
mappings.

Provide and use a evbarm/fdt/machdep.h

s/DPRINTF/VPRINTF/ for consistency

Mark fdt_addr_r __attribute__((__section__(".data")))

restore type of uboot_args

make sure uboot_args is in the data segment by saying so, as opposed to
depending on initializing it to 0.

fix printf formats ll? -> PRIx64

branches: 1.24.2;
on evbarm/RPI,RPI2, VERBOSE_INIT_ARM had broken.

XPUTC() of evbarm/rpi/rpi*_start.S uses bcm283[567]_platform_early_putchar() and it requires stack.
fixed to allocate stack when starting from rpi*_start.S and a9_mpsubr.S if needed.

to work XPUTC(), need to define VERBOSE_INIT_ARM and EARLYCONS option.

* make to work printf() and panic() even before consinit().
* tidy up output for VERBOSE_INIT_ARM.

Increase storage space for FDT data

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: 1.20.2;
Start code now updates a global variable fdt_addr_r to handle differences
in boot protocol (think arm64)

Remove unnecessary #include

Fix the calculation of the end address of a reserved memory range.
From Nick. Makes my CubieTruck boot again.

Fix off-by-one in nfdt_physmem KASSERT, and while here bump MAX_PHYSMEM
from 4 to 16.

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: 1.15.2;
trailing whitespace

Allow USB keyboards to attach as console devices.

branches: 1.13.2;
Add EX_EARLY flag for extent_create, which skips locking. Required for
using extent subsystem in early bootstrap code, before caches are enabled.
From skrll@

Ignore 0-sized memory regions in the FDT.

Fix reserved memory handling.

port-evbarm/52388: Fix number of args to a debug printf.

the extent code cannot use the full range of u_long,
so ignore the last page before 4GB too. ok jmcneill@

Add support for reserved memory and MEMORY_DISK_DYNAMIC for FDT-based
kernels.

Parse more than one entry from the /memory node's reg property.

Initialize boot_args before bootstrap for the benefit of platform code.

Add support for stdout-path= kernel cmdline option to override the
console device specified in the FDT.

branches: 1.4.2;
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.

Fix VERBOSE_INIT_ARM build with TEGRA kernel.

Rename tegra_machdep.c to fdt_machdep.c now that it no longer has any
Tegra-specific code in it.

Move evbarm/fdt/fdt_memory.[ch] to sys/dev/fdt and simplify the api and
some operations. This allows other architectures to use it.

branches: 1.4.6;
Save 400KB of RAM by fixing a really dumb bug in sizing of the fdt memory
pool.

branches: 1.3.2; 1.3.6; 1.3.8; 1.3.10;
Fix previous

Fix partial overlap logic. PR# port-evbarm/53693

Replace extent(9) with our own code to deal with adding and reserving
memory ranges.

Move evbarm/fdt/fdt_memory.[ch] to sys/dev/fdt and simplify the api and
some operations. This allows other architectures to use it.

branches: 1.1.2; 1.1.6; 1.1.16;
Replace extent(9) with our own code to deal with adding and reserving
memory ranges.

Move the aarch64 start stub from sys/arch/evbarm to sys/arch/aarch64.

Delete the unused/empty evbarm/fdt/genassym.cf while I'm here.

Don't use printx before setting up stack.

remove ifdef __clang.
make position independent, and cleanup.

XXX: make this assemble with gas, but I should remove the ifdefs...

branches: 1.1.2; 1.1.4;
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@)

Move the aarch64 start stub from sys/arch/evbarm to sys/arch/aarch64.

Delete the unused/empty evbarm/fdt/genassym.cf while I'm here.

branches: 1.1.2; 1.1.4;
fix build error

branches: 1.1.2; 1.1.6;
Provide and use a evbarm/fdt/machdep.h

Rename VM_KERNEL_IO_ADDRESS to VM_KERNEL_IO_BASE to match RISC-V

It's less letters, matches other similar variables and will help with
sharing code between the two architectures.

NFCI.

Move evbarm/fdt/fdt_memory.[ch] to sys/dev/fdt and simplify the api and
some operations. This allows other architectures to use it.

branches: 1.9.2;
Define VM_KERNEL_VM_{BASE,SIZE} for aarch64 and remove an #ifdef in
fdt/platform.h

NFCI

Simplify

Do previous differently for now

Provide some KVA layout #defines in arm32/vmparam.h and simplify
fdt/platform.h as a nice side effect

Make more KVA available

branches: 1.4.2;
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@)

fix compile error on evbarm/EXYNOS. platform.h may be included from *.S

branches: 1.2.2;
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: 1.1.6; 1.1.10;
Rename tegra_machdep.c to fdt_machdep.c now that it no longer has any
Tegra-specific code in it.