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Rick Richard
509d65fae5
When the kernel is started directly by SBI firmware, locore.S maps only
the 1GB region that contains the kernel, and initriscv() reads the DTB
through that mapping at the physical address passed in a1. If the
firmware put the DTB in another 1GB region, as QEMU does with more than
1GB of RAM, fake_preload_metadata() faults before the console is up and
the kernel hangs.
Also map the 1GB region that contains the DTB.
This fixes direct kernel booting without FreeBSD loader(8).
PR: 299088
Reviewed by: mhorne
Fixes: bfb8575469 ("riscv: Construct an identity map in locore.S")
MFC after: 1 week
Signed-off-by: Rick Richard <[email protected]>