Bring over various changes from the arm64 version of this code.

ok patrick@

After copying the FDT into a new larger buffer, adjust the FDT size to
reflect the size of the new buffer like we do on arm64.

ok patrick@

remove unused variable to fix build with llvm 13
ok jca@ naddy@

Allocate fresh memory to put our device tree into, to make sure we have least
one page of free space for us to extend into. Fixes booting on VMware Fusion.

ok kettenis@

Remove more occurences of O_RDONLY in our bootloaders.

"just do it" deraadt@

Add openbsd,dma-constraint property to /chosen node on armv7

On the Zynq-7000, the DMA constraint has to be adjusted because many
bus masters are unable to access the lowest part of RAM.

OK patrick

Add openbsd,dma-constraint property to /chosen node on armv7

On the Zynq-7000, the DMA constraint has to be adjusted because many
bus masters are unable to access the lowest part of RAM.

OK patrick@ kettenis@

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Replace all uses of 'EFI_CALL(func, params)' with
the expansion 'func(params)'.

Allows upcoming removal of eficall.h.

Tested & ok patrick@

Node without a "status" property should be considered enabled as well.

Same change made to arm64 a week ago.

Make sure that switching the console from serial to framebuffer works
for framebuffer nodes under / and /chosen.

Same change made to arm64 last month.

Remove board ID support. 6.7 shipped with a kernel that doesn't need
it anymore.

jsg@

Pass boothowto from the bootloader to the kernel by adding a
openbsd,boothowto property under /chosen.

ok patrick@

Remove reset hack; these days the U-Boot we ship for the CuBox-i is
perfectly happy without it.

ok patrick@

Port "mach dtb" code from arm64.

ok patrick@

Make efi_device_path_depth() return the full device path depth if we don't
find a media device path node. Fixes booting OpenBSD on some older U-Boot
versions that are in wide circulation such as 201

Make efi_device_path_depth() return the full device path depth if we don't
find a media device path node. Fixes booting OpenBSD on some older U-Boot
versions that are in wide circulation such as 2017.09 and 2017.11.

ok patrick@

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Add the capability to boot from another block device than the one that
efiboot was loaded from. Code taken from arm64 with softraid support
dropped for now.

ok jsg@

Make it possible to switch to framebuffer "glass" console in case it
isn't the default already. Same change as we made on arm64 two months ago.

ok patrick@

Add a check to tftp_open() that we are actually opening a TFTP device.

When reading a file from a non-TFTP device, clear the bootmac variable
to prevent the kernel from going into netboot mode.

Thi

Add a check to tftp_open() that we are actually opening a TFTP device.

When reading a file from a non-TFTP device, clear the bootmac variable
to prevent the kernel from going into netboot mode.

This allows loading a kernel from a disk device after having booted
efiboot from PXE.

style tweak and ok kettenis@

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Don't treat UnicodeChar == 0 as a keyboard input. The same fix was
done on amd64 already. Original diff from Frank Groeneveld

ok tb patrick

Set the pointer to the EFI Runtime Services, otherwise we call into
nowhere.

ok kettenis@

Port arm64's network boot efforts to armv7 as well now that there is
support for using U-Boot's network layer. Since arm64 and armv7's
efiboot(8) have the same heritance the diffs from arm64 simply

Port arm64's network boot efforts to armv7 as well now that there is
support for using U-Boot's network layer. Since arm64 and armv7's
efiboot(8) have the same heritance the diffs from arm64 simply applied
to armv7.

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The UEFI specification states that a watchdog timer should be armed for
five minutes. Disable the timer to make it possible to use efiboot for
more than five minutes.

ok patrick@ kettenis@

Pass the address of the EFI system table and the EFI memory map through
properties in the /chosen node of the FDT. The properties match the ones
used by Linux (see Documentation/arm/uefi.txt in the

Pass the address of the EFI system table and the EFI memory map through
properties in the /chosen node of the FDT. The properties match the ones
used by Linux (see Documentation/arm/uefi.txt in the Linux kernel source
tree) but with the "linux," prefix replaced by "openbsd,".

While there, reduce the diffs to the arm64 efiboot.

ok tom@, jsg@

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Add "machine exit" and "machine poweroff" commands to the arm64 and armv7
bootloaders. Replace while (1) { } with for (;;) continue; per request
from tom@.

ok tom@, jsg@

Back out previous commit but handle the case where the device path consists
of a single MEDIA_DEVICE_PATH component specially to cater for U-Boot's
somewhat broken device path handling. Add comments

Back out previous commit but handle the case where the device path consists
of a single MEDIA_DEVICE_PATH component specially to cater for U-Boot's
somewhat broken device path handling. Add comments to prevent confusion
in the future. Bump the version number once again.

ok brynet@

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Fix off-by-one in return value of efi_device_path_depth().

ok patrick@