mainboard: Add AMD unionstation RDK support

AMD unionstation Reference Design Kit is Designed for hd settop box application.
This platform using family14 APU, SB800 southbridge.
Vgabios is required, can download vgabios from AMD NDA website.
Verified Feature:
 HDMI, LAN, mini-pcie slots, sata, usb, analog audio and
 optical fiber digital audio output.

Change-Id: Ib1d1d8c889d6fb29f4298b57dfe5c5c1cea1431c
Signed-off-by: Kerry She <kerry.she@amd.com>
Signed-off-by: Kerry She <shekairui@gmail.com>
Reviewed-on: http://review.coreboot.org/434
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marcj303@gmail.com>

1 files changed, 117 insertions, 0 deletions

diff --git a/src/mainboard/amd/union_station/mainboard.c b/src/mainboard/amd/union_station/mainboard.c
new file mode 100644
index 0000000000..800d64d58c
--- /dev/null
+++ b/src/mainboard/amd/union_station/mainboard.c
@@ -0,0 +1,117 @@
+/*
+ * 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, MA  02110-1301 USA
+ */
+
+#include <console/console.h>
+#include <device/device.h>
+#include <device/pci.h>
+#include <arch/io.h>
+#include <boot/tables.h>
+#include <cpu/x86/msr.h>
+#include <cpu/amd/mtrr.h>
+#include <device/pci_def.h>
+#include "SBPLATFORM.h" 	/* Platfrom Specific Definitions */
+#include "chip.h"
+
+void set_pcie_reset(void);
+void set_pcie_dereset(void);
+
+/**
+ * TODO
+ * SB CIMx callback
+ */
+void set_pcie_reset(void)
+{
+}
+
+/**
+ * TODO
+ * mainboard specific SB CIMx callback
+ */
+void set_pcie_dereset(void)
+{
+}
+
+uint64_t uma_memory_base, uma_memory_size;
+
+/*************************************************
+* enable the dedicated function in unionstation board.
+*************************************************/
+static void unionstation_enable(device_t dev)
+{
+	printk(BIOS_INFO, "Mainboard " CONFIG_MAINBOARD_PART_NUMBER " Enable.\n");
+
+#if (CONFIG_GFXUMA == 1)
+	msr_t msr, msr2;
+	uint32_t sys_mem;
+
+	/* TOP_MEM: the top of DRAM below 4G */
+	msr = rdmsr(TOP_MEM);
+	printk
+	    (BIOS_INFO, "%s, TOP MEM: msr.lo = 0x%08x, msr.hi = 0x%08x\n",
+	     __func__, msr.lo, msr.hi);
+
+	/* TOP_MEM2: the top of DRAM above 4G */
+	msr2 = rdmsr(TOP_MEM2);
+	printk
+	    (BIOS_INFO, "%s, TOP MEM2: msr2.lo = 0x%08x, msr2.hi = 0x%08x\n",
+	     __func__, msr2.lo, msr2.hi);
+
+	/* refer to UMA Size Consideration in Family14h BKDG. */
+	sys_mem = msr.lo + 0x1000000; // Ignore 16MB allocated for C6 when finding UMA size, refer MemNGetUmaSizeON()
+	if ((msr.hi & 0x0000000F) || (sys_mem >= 0x80000000)) {
+		uma_memory_size = 0x18000000;	/* >= 2G memory, 384M recommended UMA */
+	}
+	else {
+	  if (sys_mem >= 0x40000000) {
+		  uma_memory_size = 0x10000000;	/* >= 1G memory, 256M recommended UMA */
+	  }
+	  else {
+		  uma_memory_size = 0x4000000;	/* <1G memory, 64M recommended UMA */
+	  }
+	}
+
+	uma_memory_base = msr.lo - uma_memory_size;	/* TOP_MEM1 */
+	printk(BIOS_INFO, "%s: uma size 0x%08llx, memory start 0x%08llx\n",
+		    __func__, uma_memory_size, uma_memory_base);
+
+	/* TODO: TOP_MEM2 */
+#else
+	uma_memory_size = 0x10000000;	/* 256M recommended UMA */
+	uma_memory_base = 0x30000000;	/* 1GB  system memory supported */
+#endif
+
+}
+
+int add_mainboard_resources(struct lb_memory *mem)
+{
+	/* UMA is removed from system memory in the northbridge code, but
+	 * in some circumstances we want the memory mentioned as reserved.
+ 	 */
+#if (CONFIG_GFXUMA == 1)
+	printk(BIOS_INFO, "uma_memory_start=0x%llx, uma_memory_size=0x%llx \n",
+		    uma_memory_base, uma_memory_size);
+	lb_add_memory_range(mem, LB_MEM_RESERVED, uma_memory_base,
+			    uma_memory_size);
+#endif
+	return 0;
+}
+struct chip_operations mainboard_ops = {
+	CHIP_NAME(CONFIG_MAINBOARD_VENDOR " " CONFIG_MAINBOARD_PART_NUMBER " Mainboard")
+	.enable_dev = unionstation_enable,
+};