diff options
| author | Jonas Gorski <jogo@openwrt.org> | 2015-04-12 12:24:58 +0200 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2015-06-21 21:54:14 +0200 |
| commit | 1da8f1798e307fb8422753984339beb00025f97d (patch) | |
| tree | fd1a2b86e86e171d2d0a3efb379d7289ec35d291 /arch/mips/Kconfig | |
| parent | 01306aeadd75f8202bbeb66bf3da56b431364519 (diff) | |
MIPS: Add support for vmlinux.bin appended dtb
Add support for detecting a vmlinux.bin appended dtb and overriding
the boot arguments to match the UHI interface.
Due to the PERCPU section being empty for !SMP, but still modifying
the current address by aligning it to the page size, do not define
it for !SMP builds to allow __appended_dtb to still point to
the actual end of the data.
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Cc: linux-mips@linux-mips.org
Cc: devicetree@vger.kernel.org
Cc: John Crispin <blogic@openwrt.org>
Cc: Kevin Cernekee <cernekee@gmail.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Cc: Andrew Bresticker <abrestic@chromium.org>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: James Hartley <James.Hartley@imgtec.com>
Patchwork: https://patchwork.linux-mips.org/patch/9739/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/Kconfig')
| -rw-r--r-- | arch/mips/Kconfig | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 164d8c73552f..7cb5f6dbaeee 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -2677,6 +2677,33 @@ config USE_OF config BUILTIN_DTB bool +choice + prompt "Kernel appended dtb support" if OF + default MIPS_NO_APPENDED_DTB + + config MIPS_NO_APPENDED_DTB + bool "None" + help + Do not enable appended dtb support. + + config MIPS_RAW_APPENDED_DTB + bool "vmlinux.bin" + help + With this option, the boot code will look for a device tree binary + DTB) appended to raw vmlinux.bin (without decompressor). + (e.g. cat vmlinux.bin <filename>.dtb > vmlinux_w_dtb). + + This is meant as a backward compatibility convenience for those + systems with a bootloader that can't be upgraded to accommodate + the documented boot protocol using a device tree. + + Beware that there is very little in terms of protection against + this option being confused by leftover garbage in memory that might + look like a DTB header after a reboot if no actual DTB is appended + to vmlinux.bin. Do not leave this option active in a production kernel + if you don't intend to always append a DTB. +endchoice + endmenu config LOCKDEP_SUPPORT |