AGESA fam12 fam14 fam15: Use common agesa_readSpd()

Remove northbridge specific callouts for AGESA_READ_SPD.

Move low-level SMBus code to southbridge.

Change-Id: I5fc91c49d9ef8e0af1c4d8194f857c61ce417d1d
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/7113
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
diff --git a/src/southbridge/amd/cimx/sb800/smbus_spd.h b/src/southbridge/amd/cimx/sb800/smbus_spd.h
new file mode 100644
index 0000000..30bf83f
--- /dev/null
+++ b/src/southbridge/amd/cimx/sb800/smbus_spd.h
@@ -0,0 +1,51 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2011 Advanced Micro Devices, Inc.
+ *
+ * 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, MA02110-1301 USA
+ */
+
+#ifndef _SMBUS_SPD_H_
+#define _SMBUS_SPD_H_
+
+#define READ_BIT				0x01
+
+#define SMBUS_INTERRUPT_MASK	0x02
+#define HOSTBUSY_MASK			0x01
+
+#define SMBUS_READ_BYTE_COMMAND	0x48
+#define SMBUS_READ_COMMAND		0x44
+
+#define MAX_READ_TSC_COUNT		(2000000000 / 10)
+
+#define PMIO_INDEX_REG			0xCD6
+#define PMIO_DATA_REG			0xCD7
+
+#define SMBUS_BAR_LOW_BYTE		0x2C
+#define SMBUS_BAR_HIGH_BYTE		0x2D
+
+#define SMBUS_STATUS_REG		0x00
+#define SMBUS_SLAVE_STATUS_REG	0x01
+#define SMBUS_COMMAND_REG		0x02
+#define SMBUS_CONTROL_REG		0x03
+#define SMBUS_HOST_CMD_REG		0x04
+#define SMBUS_DATA0_REG			0x05
+#define SMBUS_CLOCK_REG			0x0E
+
+#define STATUS__COMPLETED_SUCCESSFULLY	0x02
+
+#define SMBUS_FREQUENCY_CONST	66000000 / 4
+
+#endif