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

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@)

branches: 1.3.2;
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

Initial RPI2 support - it doesn't work yet. The generic timer gets messed
up somehow.

This commit changes the KVA layout of the RPI.

branches: 1.1.2; 1.1.4; 1.1.6; 1.1.18; 1.1.20;
Initial commit of support for the RaspberryPI (www.raspberrypi.org)

This is enough for serial console via the gpio header pins and to get to
multiuser.

A huge thank you to Matt Thomas for all his help.

G/C

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

Initial RPI2 support - it doesn't work yet. The generic timer gets messed
up somehow.

This commit changes the KVA layout of the RPI.

branches: 1.3.2; 1.3.4;
Re-arrange RPI VM layout and enable __HAVE_MM_MD_DIRECT_MAPPED_PHYS. RPI
kernels now boot again.

I'm not admitting defeat in why there are problems with the
non-__HAVE_MM_MD_DIRECT_MAPPED_PHYS case.

branches: 1.2.2;
Whitespace

branches: 1.1.2; 1.1.4; 1.1.6; 1.1.8;
Initial commit of support for the RaspberryPI (www.raspberrypi.org)

This is enough for serial console via the gpio header pins and to get to
multiuser.

A huge thank you to Matt Thomas for all his help.

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

Provide and use kern_vtopdiff in KERN_{VTOPHYS,PHYSTOV}. A step towards
generic arm.

branches: 1.7.2;
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.

remove unnecessary code. .Lmmu_init_table is in same section, and also not r8.

branches: 1.5.2;
Start code now updates a global variable fdt_addr_r to handle differences
in boot protocol (think arm64)

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: 1.3.16;
Check for hypervisor mode in cortex_init and exit if the cpu started
there.

Needed by latest RPI firmware.

Use character constants instead of ascii values for readability

branches: 1.1.2; 1.1.4;
Initial RPI2 support - it doesn't work yet. The generic timer gets messed
up somehow.

This commit changes the KVA layout of the RPI.

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

on RPI2, fix compile failure without options MULTIPROCESSOR.

Firmware after May 8, 2017 places APs in WFE state at boot. Add a "sev"
after writing the start vector, otherwise secondary CPUs will not boot.

Disable sdhost instead of sdhc for non-wifibt boards.

For boards with bluetooth, use AUX UART for console and PLCOM for bt.

Enable GPCLK2 to Bluetooth.

Only remap sdhost/sdhci on boards with wifi.

Enable AUX UART for BT on btwifi boards

Add support for BCM2835 AUX UART.

Explicitly configure pin pull-down/up settings for SDIO.

Add driver for the bcm2835 internal SD controller. On boards with SDIO
Wi-Fi, the internal SD controller is used for the SD card slot and the
Arasan SDHCI controller is used for SDIO.

Enable UART0 (PL011) on GPIO header for Raspberry Pi 3 / Zero W

Disable BSC0 on Raspberry Pi 3 and Zero W boards.

branches: 1.70.8;
Use the VC property mailbox to request the UART clock rate and use it
appropriately

Newer firmwares use 48MHz

Whitespace

branches: 1.68.2;
Fix up bcm283[56] bus_space(4) to really use bus addresses for
peripherals, etc

Simplifies the code in various places and uses the abstraction in
more places. (bcm2835_gpio_subr.c still doesn't)

Re-enable cpus [123] now that bcm2835_intr.c is fixed with rev 1.11/

No need to cpu_dcache_wbinv_all now that a9_mpsubr.S invalidates L1 only
as it should

MP not ready, disable it again

Before spinning up the secondary cpus flush the dcache otherwise the
dcache invalidate in cortex_mpstart makes bad things happen.

I have no idea why.

RPI2 boots again

re-enable multiprocessor support now that sdmmc has been fixed

Disable non-boot CPUs on RPI2 - there are still issues with interrupt
handling.

RPI2 MP support.

Thanks to Matt Thomas for making this possible with his changes to pic.c

Tweak cpu start up slightly and print TTBR for cortex_mmuinfo when
VERBOSE_INIT_ARM

Do invalidate the cache as RPI2 build with Clang can't fetch the memory
config otherwise.

Spin up the non-boot CPUs, but don't allow cpu_boot_secondary_processors
to see them for now.

RPI2 nows works well with only the boot cpu.

Initial RPI2 support - it doesn't work yet. The generic timer gets messed
up somehow.

This commit changes the KVA layout of the RPI.

Newer Raspberry Pi firmware has changed the framebuffer from BGR to RGB.
The method we use to set the pixel order (vcprop set pixel order) does
not seem to work, nor does querying the pixel order (vcprop get pixel order).

The firmware passes this information to the kernel by adding a
"bcm2708_fb.fbswap" kernel cmdline arg. 0=BGR, 1=RGB. If the parameter is
absent, assume we are running on old firmware and use BGR mode.

branches: 1.55.2;
fwrev is a timestamp, print in decimal.

pay attention to copyin()'s return values

Introduce RPI_HWCURSOR and default to off. The existing code causes
problems with vchiq at the moment.

turn off hardware cursor while blanking screen.

make board/firmware revisions visible via sysctl

shut up gcc warning
while there, do some magic number reduction

make global variables static
also, make cursor test pattern red/green to highlight RGB vs. BGR

add hardware cursor support

use dma channel mask from firmware

Grab the DMA channel mask from the firmware.

implement WSCONSIO_[G|S]VIDEO by hijacking bcm2835_genfb's ioctl
next step: hardware cursor

Remove unnecessary #include

branches: 1.43.2;
bump VCPROP_MAXCMDLINE to 1024, use this instead of MAX_BOOT_STRING for sizing boot_args, and allow for overriding VCPROP_MAXCMDLINE in kernel config. Fixes cmdline parsing with newer firmware (required for B+)

need opt_arm_debug.h for VERBOSE_INIT_ARM

Re-arrange RPI VM layout and enable __HAVE_MM_MD_DIRECT_MAPPED_PHYS. RPI
kernels now boot again.

I'm not admitting defeat in why there are problems with the
non-__HAVE_MM_MD_DIRECT_MAPPED_PHYS case.

branches: 1.40.2;
Trailing whitespace.

Move alignment attribute onto the types, not the variable instances.
Drop (unused) packed attribute.

Switch to dwctwo(4) from dotg(4) for the RaspberryPi port. This brings
DMA support and (initial) isoc transfer support.

Remove URTWN_DOTG_WORKAROUND as dwctwo doesn't appear to need it.

branches: 1.37.2;
Add attempt at KGDB support from Reiound. I couldn't get gdb to attach
properly, but the kernel was definitely in kgdb_trap and would respond
to $?#3f if typed via tip(1)

Fix up the VCONS_DRAW_INTR support and DDB.

From reinoud.

Add a new installer image for Raspberry PI to evbarm

Includes the following major changes:

1) Add new configmenu item to sysinst to allow creation of users at
post-install time.
2) Add an sshramdisk type to evbarm, which is a ramdisk with sshd
enabled, allowing users to install on a headless PI by sshing to the
device with the account "sysinst" password "netbsd" to begin the
installation. (Note, neither the account, nor the ssh setup are copied to
the finalized installation image)
3) Change mkimage to build a boot-only image, without the root filesystems.

Much of the sshramdisk code could be reused on other ports easily.

Oops, put back the initialisation of cpu_cc_freq

Fix some VERBOSE_INIT_ARM output

add machdep.serial sysctl for getting board serial number

dont crash if edid data is missing or bad

Assume the first ld@sdmmc to attach is the booted device until
possibily-otherwise specified during evbarm cpu_rootconf().

if the firmware gives us a bad emmc clock rate, ignore it

allow ukbd to be the console keyboard if genfb is the console display device

Modify fb attachment so genfb still attaches even if it isn't the console
device. Slight change to cmdline.txt to allow for this:

- console=fb enables fb console, otherwise serial console will be used
- fb=WxH to select a mode, otherwise EDID will be tried and fallback to
default mode (1280x720)
- fb=disable to disable fb completely

If genfb.type=<int> is passed on cmdline, override the wsdisplay type
returned by WSDISPLAYIO_GTYPE ioctl.

Provide the mac address for usmsc(4) as read from the firmware.

framebuffer only seems to support BGR mode, so request it and set is_bgr property on device when in BGR mode

Provide dotg(4) - a driver for the Synposys DesignWare OTG USB IP found
in the RaspberryPI. The driver supports host mode and control, interrupt,
and bulk transfers only at this point.

Heavily based on the FreeBSD driver by Hans Petter Selasky.

Thanks to all who helped. Jared McNeill, Michael van Elst and other.

genfb support for rpi

Use the VC power manager mailbox channel to power up the devices we have
support for.

pass cmdline.txt boot arguments to kernel

Get the CPU frequency and set cpu_cc_freq.

Query the EMMC clock rate and use it if it's available.

Make rpi_bootparams static

branches: 1.16.2;
Count the memory regions in bootconfig.dramblocks when using the VCPROP
information.

Make the first 8 pages available for use.

Style change. No functional change.

Add the Raspberry PI firmware VC mailbox channel numbers.

Add some VC property tag definitions and use them to get ARM/VC memory
split.

Grab a few others things in the process, but don't do anything other than
display them when VERBOSE_INIT_ARM is defined.

Remove some unused includes

Use armreg_ttbr_read instead of local version. No code change.

Remove one set of _[AS] defines. No functional change.

Remove some unnecessary headers.

Update copyright

branches: 1.7.2;
Switch RaspberryPI to use the new boot/init code.

... and remove inclusion of defparam-created header.

Get accessible memory quantity and kernel command line via Linux ARM 'A'-tag
interface used by Raspberry Pi's start.elf.

Move the standard definitions of the {UND,IRQ,FIQ,ABT}_STACK_SIZE to
<arm32/machdep.h>
Move the extern for cpu_reset_address to the same file.
Add cpu_reset_address_paddr.
Kill cpu_reset_v4_MMU_disable.
if cpu_reset_address is NULL, then the MMU will be disabled.

branches: 1.3.2;
Fix more -fno-common fallout.
Move more variables to common locations.

Remove declartions of physmem

Initial commit of support for the RaspberryPI (www.raspberrypi.org)

This is enough for serial console via the gpio header pins and to get to
multiuser.

A huge thank you to Matt Thomas for all his help.

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

Provide and use kern_vtopdiff in KERN_{VTOPHYS,PHYSTOV}. A step towards
generic arm.

Subtract KERNEL_BASE_VOFFSET from all VAs to get PA. How did this work
before?

branches: 1.18.2;
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.

branches: 1.17.2;
Start code now updates a global variable fdt_addr_r to handle differences
in boot protocol (think arm64)

Need to map 512MB for some RPIs

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

Trailing whitespace.

Initial RPI2 support - it doesn't work yet. The generic timer gets messed
up somehow.

This commit changes the KVA layout of the RPI.

branches: 1.12.2; 1.12.4;
Prepare for ARM_MMU_EXTENDED

Enabling alignment faults and unaligned access at the same time makes
the former win. LLVM is more aggressive than GCC about using unaligned
access, so it would crash during pmap_init.

Whitespace.

branches: 1.9.2;
Trailing whitespace.

Add CPU_CONTROL_UNAL_ENABLE. New ABIs demand unaligned accesses!

branches: 1.7.2; 1.7.4;
Map 1M beyond _end to make sure we bootstrap.

Don't depend on any memory split for initial L1 table. Size kernel mapping
according to actual size.

branches: 1.5.2;
... and remove inclusion of defparam-created header.

Get accessible memory quantity and kernel command line via Linux ARM 'A'-tag
interface used by Raspberry Pi's start.elf.

Do not depend on MEMSIZE being defined, instead always place temporary
MMU tables just below 128MiB.

branches: 1.2.2;
Remove #if 0 code.

Initial commit of support for the RaspberryPI (www.raspberrypi.org)

This is enough for serial console via the gpio header pins and to get to
multiuser.

A huge thank you to Matt Thomas for all his help.

Add some firmware support functions and define more properties
- framebuffer
- power management
- vchiq init
- RPI4 USB firmware support

Data written to and read from bcmmbox(4) should be in little-endian.

Sort headers. No binary changes.

branches: 1.5.12;
Add machdep.cpu.frequency.available node to support estd.

While the RPI can run at many intermediate clock frequencies,
this is sufficient for estd and is known to work with every
firmware revision.

branches: 1.4.18; 1.4.20;
be verbose about sysmon error.
enable monitoring.

Trailing whitespace.

branches: 1.2.2; 1.2.4; 1.2.6; 1.2.8;
Add support for rpi cpu frequency scaling through machdep.cpu.frequency.*
sysctls. The minimum and maximum supported frequencies are based on the
"arm_freq_min" and "arm_freq" values in config.txt.

add support for rpi temperature sensor

s/depreciated/deprecated/g

branches: 1.1.2; 1.1.4; 1.1.6; 1.1.56; 1.1.58;
Add the Raspberry PI firmware VC mailbox channel numbers.

Add some VC property tag definitions and use them to get ARM/VC memory
split.

Grab a few others things in the process, but don't do anything other than
display them when VERBOSE_INIT_ARM is defined.

branches: 1.1.2; 1.1.4; 1.1.8;
Use the VC power manager mailbox channel to power up the devices we have
support for.

Add some firmware support functions and define more properties
- framebuffer
- power management
- vchiq init
- RPI4 USB firmware support

Data written to and read from bcmmbox(4) should be in little-endian.

Remove stray white space. No binary changes.

branches: 1.17.8;
Add emmc2 clock goop from mlelstv@

(missing commit)

branches: 1.16.6;
Disable BSC0 on Raspberry Pi 3 and Zero W boards.

branches: 1.15.10;
Add more tags understood by the firmware.

Update vcprop_tag_clockrate structure

branches: 1.13.2;
add hardware cursor support

the RPi wiki had the values for VCPROPTAG_SET_CURSOR_INFO and
VCPROPTAG_SET_CURSOR_STATE swapped - now they actually work
thanks jmcneill@ for having the right idea

add VC memory management goop

add goop for hardware cursor handling

branches: 1.9.2;
bump VCPROP_MAXCMDLINE to 1024, use this instead of MAX_BOOT_STRING for sizing boot_args, and allow for overriding VCPROP_MAXCMDLINE in kernel config. Fixes cmdline parsing with newer firmware (required for B+)

branches: 1.8.8;
Added __packed in a couple of places to help AEABI

add vc fb alpha and screen blanking tags

add a couple more fb prop tags

add some framebuffer related vc tags

Add support for rpi cpu frequency scaling through machdep.cpu.frequency.*
sysctls. The minimum and maximum supported frequencies are based on the
"arm_freq_min" and "arm_freq" values in config.txt.

add some more vcprop definitions -- power, temperature, and voltage related

branches: 1.2.2; 1.2.4;
Add VCPROPTAG_[GS]ET_CLOCK{R,ST}ATE

branches: 1.1.2;
Add the Raspberry PI firmware VC mailbox channel numbers.

Add some VC property tag definitions and use them to get ARM/VC memory
split.

Grab a few others things in the process, but don't do anything other than
display them when VERBOSE_INIT_ARM is defined.

Add some firmware support functions and define more properties
- framebuffer
- power management
- vchiq init
- RPI4 USB firmware support

Data written to and read from bcmmbox(4) should be in little-endian.

Add missing __KERNEL_RCSID().

Sort headers. No binary changes.

branches: 1.6.2;
G/C

Remove unnecessary #includE

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;
Trailing whitespcae

Better error handling.

add hardware cursor support