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,
+};