mainboard/emulation/qemu-sbsa: Add qemu-sbsa board

Add coreboot support for qemu's sbsa-ref (Server Base System
Architecture) machine (-m sbsa-ref).

The qemu-sbsa coreboot port runs on EL2 and is the payload of the
EL3 firmware (Arm Trusted Firmware).

Note that, coreboot expects a pointer to the FDT in x0. Make sure
to configure TF-A to handoff the FDT pointer.

Example qemu commandline:

  qemu-system-aarch64 -nographic -m 2048 -M sbsa-ref \
                      -pflash <path/to/TFA.fd> \
                      -pflash <path/to/coreboot.rom>

The Documentation can be found here:
Documentation/mainboard/emulation/qemu-sbsa.md

Change-Id: Iacc9aaf065e0d153336cbef9a9b5b46a9eb24a53
Signed-off-by: David Milosevic <David.Milosevic@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79086
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/src/mainboard/emulation/qemu-sbsa/memlayout.ld b/src/mainboard/emulation/qemu-sbsa/memlayout.ld
new file mode 100644
index 0000000000..d178521b6e
--- /dev/null
+++ b/src/mainboard/emulation/qemu-sbsa/memlayout.ld
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <memlayout.h>
+#include <arch/header.ld>
+
+/*
+ * Memory map for QEMU sbsa-ref machine since
+ * [hw/arm/sbsa-ref.c, c6f3cbca32bde9ee94d9949aa63e8a7ef2d7bc5b]
+ */
+SECTIONS
+{
+	REGION(flash, 0x10000000, CONFIG_ROM_SIZE, 8)
+
+	DRAM_START(0x10000000000)
+	BOOTBLOCK(0x10020010000, 64K)
+	STACK(0x10020020000, 54K)
+	CBFS_MCACHE(0x1002002D800, 8K)
+	FMAP_CACHE(0x1002002F800, 2K)
+	TIMESTAMP(0x10020030000, 1K)
+	TTB(0x10020070000, 128K)
+	RAMSTAGE(0x100200b0000, 16M)
+	REGION(fdt_pointer, 0x100210b0000, ARCH_POINTER_ALIGN_SIZE, ARCH_POINTER_ALIGN_SIZE)
+
+	POSTRAM_CBFS_CACHE(0x10021200000, 1M)
+}