cpu/amd/model_10xxx: Move GFXUMA size calculation to separate function

This is required for early CBMEM support.

Change-Id: I31d9b6a04ef963a7d3e045d9c5201ae64604218a
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: http://review.coreboot.org/8663
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

3 files changed, 70 insertions, 0 deletions

diff --git a/src/cpu/amd/model_10xxx/Makefile.inc b/src/cpu/amd/model_10xxx/Makefile.inc
index ba12dcd3ef..c17e66c6c2 100644
--- a/src/cpu/amd/model_10xxx/Makefile.inc
+++ b/src/cpu/amd/model_10xxx/Makefile.inc
@@ -3,6 +3,8 @@ ramstage-y += model_10xxx_init.c
 ramstage-y += processor_name.c
 
 romstage-y += update_microcode.c
+romstage-y += ram_calc.c
+ramstage-y += ram_calc.c
 ramstage-y += monotonic_timer.c
 ramstage-$(CONFIG_HAVE_ACPI_TABLES) += powernow_acpi.c
 
diff --git a/src/cpu/amd/model_10xxx/ram_calc.c b/src/cpu/amd/model_10xxx/ram_calc.c
new file mode 100644
index 0000000000..98b80e96b9
--- /dev/null
+++ b/src/cpu/amd/model_10xxx/ram_calc.c
@@ -0,0 +1,43 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2015 Timothy Pearson <tpearson@raptorengineeringinc.com>, Raptor Engineering
+ * Copyright (C) 2007 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 <cpu/cpu.h>
+#include <cpu/x86/msr.h>
+#include <cpu/amd/mtrr.h>
+
+#include "ram_calc.h"
+
+uint64_t get_uma_memory_size(uint64_t topmem)
+{
+	uint64_t uma_size = 0;
+	if (IS_ENABLED(CONFIG_GFXUMA)) {
+		/* refer to UMA Size Consideration in 780 BDG. */
+		if (topmem > 0x40000000)	/* 1GB and above system memory */
+			uma_size = 0x10000000;	/* 256M recommended UMA */
+
+		else if (topmem > 0x20000000)	/* 512M - 1023M system memory */
+			uma_size = 0x8000000;	/* 128M recommended UMA */
+
+		else if (topmem > 0x10000000)	/* 256M - 511M system memory */
+			uma_size = 0x4000000;	/* 64M recommended UMA */
+	}
+
+	return uma_size;
+}
diff --git a/src/cpu/amd/model_10xxx/ram_calc.h b/src/cpu/amd/model_10xxx/ram_calc.h
new file mode 100644
index 0000000000..24c120ca5a
--- /dev/null
+++ b/src/cpu/amd/model_10xxx/ram_calc.h
@@ -0,0 +1,25 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2015 Timothy Pearson <tpearson@raptorengineeringinc.com>, Raptor Engineering
+ *
+ * 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
+ */
+
+#ifndef _AMD_MODEL_10XXX_RAM_CALC_H_
+#define _AMD_MODEL_10XXX_RAM_CALC_H_
+
+uint64_t get_uma_memory_size(uint64_t topmem);
+
+#endif