qemu-x86: Implement more features

This patch switches the Qemu target to use (pseudo) Cache As RAM
and enables some ACPI code. This allows to use the CBMEM console
and timestamp code with coreboot in Qemu. Right now, the ACPI code
is commented out because leaving it in breaks IDE.

Change-Id: Ie20f3ecc194004f354ae3437b9cf9175382cadf8
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/2113
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/src/mainboard/emulation/qemu-x86/memory.c b/src/mainboard/emulation/qemu-x86/memory.c
new file mode 100644
index 0000000000..e4b3b98b11
--- /dev/null
+++ b/src/mainboard/emulation/qemu-x86/memory.c
@@ -0,0 +1,47 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2004 Stefan Reinauer <stefan.reinauer@coreboot.org>
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
+ */
+
+#include <cbmem.h>
+
+#define CMOS_ADDR_PORT 0x70
+#define CMOS_DATA_PORT 0x71
+#define HIGH_RAM_ADDR 0x35
+#define LOW_RAM_ADDR 0x34
+
+static unsigned long qemu_get_memory_size(void)
+{
+	unsigned long tomk;
+	outb (HIGH_RAM_ADDR, CMOS_ADDR_PORT);
+	tomk = ((unsigned long) inb(CMOS_DATA_PORT)) << 14;
+	outb (LOW_RAM_ADDR, CMOS_ADDR_PORT);
+	tomk |= ((unsigned long) inb(CMOS_DATA_PORT)) << 6;
+	tomk += 16 * 1024;
+	return tomk;
+}
+
+unsigned long get_top_of_ram(void);
+unsigned long get_top_of_ram(void)
+{
+	return qemu_get_memory_size() * 1024;
+}
+
+struct cbmem_entry *get_cbmem_toc(void)
+{
+	return (struct cbmem_entry *)(get_top_of_ram() - HIGH_MEMORY_SIZE);
+}