From bd4bcab8addf8791a9100140ae963415450b9663 Mon Sep 17 00:00:00 2001 From: Patrick Rudolph Date: Sun, 30 Jun 2019 22:12:15 +0200 Subject: lib: Rewrite qemu-armv7 ramdetect * Move armv7 RAM dection to a common place * Enable it for all emulated platforms * Use 32bit probe values and restore memory even on failure * Use the new logic on the following boards: ** qemu-armv7 ** qemu-riscv Tested on qemu-system-riscv: Fixes kernel panic due to wrong memory limits reported. Change-Id: I37386c6a95bfc3b7b25aeae32c6e14cff9913513 Signed-off-by: Patrick Rudolph Reviewed-on: https://review.coreboot.org/c/coreboot/+/33934 Tested-by: build bot (Jenkins) Reviewed-by: Angel Pons --- src/include/ramdetect.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 src/include/ramdetect.h (limited to 'src/include') diff --git a/src/include/ramdetect.h b/src/include/ramdetect.h new file mode 100644 index 0000000000..b63cdf14cf --- /dev/null +++ b/src/include/ramdetect.h @@ -0,0 +1,22 @@ +/* + * This file is part of the coreboot project. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +/* + * Probe an area if it's read/writable. + * Primary use case is the detection of DRAM amount on emulators. + * + * @param dram_start Physical address of DRAM start + * @param probe_size Maximum size in MiB to probe for + * @return The detected DRAM size in MiB + */ +size_t probe_ramsize(const uintptr_t dram_start, const size_t probe_size); -- cgit v1.2.3