[coreboot-gerrit] Change in coreboot[master]: WIP: riscv/mb/qemu: fix DRAM probing

[Philipp Hug (Code Review)]

Hello ron minnich, Patrick Georgi, Martin Roth,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/36486

to look at the new patch set (#2).

Change subject: WIP: riscv/mb/qemu: fix DRAM probing
......................................................................

WIP: riscv/mb/qemu: fix DRAM probing

Current version of qemu raise an exception when accessing invalid memory.
Modify the probing code to temporary redirect the exception handler like on
ARM platform.

TEST=qemu detects RAM size correctly
Change-Id: I25860f688c7546714f6fdbce8c8f96da6400813c
Signed-off-by: Philipp Hug 
---
M src/arch/riscv/Makefile.inc
M src/arch/riscv/include/arch/exception.h
A src/arch/riscv/ramdetect.c
M src/arch/riscv/trap_handler.c
M src/arch/riscv/trap_util.S
M src/lib/ramdetect.c
6 files changed, 57 insertions(+), 3 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/86/36486/2