freebsd-skq/stand/uboot/fdt
Emmanuel Vadot 7fcce9c487 loader: fdt: Try to load every possible DTB from u-boot
U-Boot setup a few variables :

 - fdt_addr which is the board static dtb (most of the time loaded before
   u-boot or coming from some hardware like a ROM)
 - fdt_addr_r which is a location in RAM that holds the DTB loaded by
   u-boot or before u-boot

In the case of u-boot + rpi firmware the DTB is loaded in RAM but the location
still end up in the fdt_addr variable and the fdt_addr_r variable exist.

Change the behavior so we test that a DTB exists for every possible variable :

 - fdt_addr_r is checked first as if u-boot needed to modify it the
   correct DTB will live there.
 - fdt_addr is checked second as if we run on a hardware with DTB in ROM
   it means that we what/need to run that
 - fdtaddr looks like a FreeBSD-ism but since I'm not sure leave it.

Reviewed by:	gonzo
Differential Revision:	https://reviews.freebsd.org/D16101
2018-07-04 07:37:45 +00:00
..
Makefile Eliminate bsd.stand.mk and -fPIC 32-bit intel builds 2018-02-16 00:17:32 +00:00
uboot_fdt.c loader: fdt: Try to load every possible DTB from u-boot 2018-07-04 07:37:45 +00:00