[S] Change in coreboot[master]: mb/emulation/riscv: Limit DRAM size

[Arthur Heymans (Code Review)]

Attention is currently required from: Philipp Hug, ron minnich.

Arthur Heymans has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/68843 )

Change subject: mb/emulation/riscv: Limit DRAM size
......................................................................

mb/emulation/riscv: Limit DRAM size

Qemu only limits 16GiB of address space and gets confused when probing
for addresses much higher. Therefore limit the amount of dram we wish to
probe.

Change-Id: Ib8555de361d1129d3d1995f056518c576f055515
Signed-off-by: Arthur Heymans 
---
M src/mainboard/emulation/qemu-riscv/Kconfig
1 file changed, 17 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/43/68843/1

diff --git a/src/mainboard/emulation/qemu-riscv/Kconfig b/src/mainboard/emulation/qemu-riscv/Kconfig
index 0af309a..5891595 100644
--- a/src/mainboard/emulation/qemu-riscv/Kconfig
+++ b/src/mainboard/emulation/qemu-riscv/Kconfig
@@ -44,9 +44,11 @@
    int
    default 1

+# Qemu maps MMIO at ALIGN_UP(top_of_mem, 16 * GiB)
+# To avoid confusing the dram probing algoritm, avoid large dram sizes (16G - 1m)
 config DRAM_SIZE_MB
    int
-	default 32768
+	default 16383

config OPENSBI_PLATFORM
    string