armv7: Add emulation/qemu-armv7 board.

To simplify testing ARM implementation, we need a QEMU configuration for
ARM. The qemu-armv7 provides serial output, CBFS simulation, and full
boot path (bootblock, romstage, ramstage) to verify the boot loader
functionality.

To run with QEMU:
 export QEMU_AUDIO_DRV=none
 qemu-system-arm -M vexpress-a9 -m 1024M -nographic -kernel build/coreboot.rom

Verified to boot until ramstage loaded successfully by QEMU v1.0.50.

Change-Id: I1f23ffaf408199811a0756236821c7e0f2a85004
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: http://review.coreboot.org/2354
Reviewed-by: David Hendricks <dhendrix@chromium.org>
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

1 files changed, 57 insertions, 0 deletions

diff --git a/src/mainboard/emulation/qemu-armv7/media.c b/src/mainboard/emulation/qemu-armv7/media.c
new file mode 100644
index 0000000000..d024b5d340
--- /dev/null
+++ b/src/mainboard/emulation/qemu-armv7/media.c
@@ -0,0 +1,57 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2013 Google, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ */
+#include <cbfs.h>
+#include <string.h>
+#include <console/console.h>
+
+/* Simple memory-mapped ROM emulation. */
+
+static int emu_rom_open(struct cbfs_media *media) {
+	return 0;
+}
+
+static void *emu_rom_map(struct cbfs_media *media, size_t offset, size_t count) {
+        return (void*)(offset + CONFIG_BOOTBLOCK_BASE);
+}
+
+static void *emu_rom_unmap(struct cbfs_media *media, const void *address) {
+	return NULL;
+}
+
+static size_t emu_rom_read(struct cbfs_media *media, void *dest, size_t offset,
+			   size_t count) {
+	void *ptr = emu_rom_map(media, offset, count);
+	memcpy(dest, ptr, count);
+	emu_rom_unmap(media, ptr);
+	return count;
+}
+
+static int emu_rom_close(struct cbfs_media *media) {
+	return 0;
+}
+
+int init_emu_rom_cbfs_media(struct cbfs_media *media);
+int init_emu_rom_cbfs_media(struct cbfs_media *media) {
+	media->open = emu_rom_open;
+	media->close = emu_rom_close;
+	media->map = emu_rom_map;
+	media->unmap = emu_rom_unmap;
+	media->read = emu_rom_read;
+	return 0;
+}
+
+int init_default_cbfs_media(struct cbfs_media *media) {
+	return init_emu_rom_cbfs_media(media);
+}