From 231f2614021967c9645d9e5b83dbea2089600be3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ky=C3=B6sti=20M=C3=A4lkki?= <kyosti.malkki@gmail.com>
Date: Wed, 11 Jul 2012 08:02:57 +0300
Subject: Move setup_uma_memory() to AMDFAM10 northbridge
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Following boards had identical code:
  advansus/a785e-i
  amd/bimini_fam10
  amd/mahogany_fam10
  asus/m5a88-v
  avalue/eax-785e
  gigabyte/ma78gm
  iei/kino-780am2-fam10
  jetway/pa78vm5

Following boards had identical code:
  amd/tilapia_fam10
  asus/m4a78-em
  asus/m4a785-m
  gigabyte/ma785gm
  gigabyte/ma785gmt

In between the two, only whitespace difference.

Change-Id: Iaa48cc7b0038ebcc81be49219b4fc87670aa9941
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/1209
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
---
 src/northbridge/amd/amdfam10/northbridge.c | 44 ++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

(limited to 'src/northbridge/amd')

diff --git a/src/northbridge/amd/amdfam10/northbridge.c b/src/northbridge/amd/amdfam10/northbridge.c
index 41434e8fe5..2c9b6a22c4 100644
--- a/src/northbridge/amd/amdfam10/northbridge.c
+++ b/src/northbridge/amd/amdfam10/northbridge.c
@@ -30,6 +30,7 @@
 #include <cpu/cpu.h>
 
 #include <cpu/x86/lapic.h>
+#include <cpu/amd/mtrr.h>
 
 #if CONFIG_LOGICAL_CPUS
 #include <cpu/amd/multicore.h>
@@ -847,6 +848,49 @@ static void disable_hoist_memory(unsigned long hole_startk, int node_id)
 #include <cbmem.h>
 #endif
 
+void setup_uma_memory(void)
+{
+#if CONFIG_GFXUMA
+	msr_t msr, msr2;
+
+	/* 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: msr.lo = 0x%08x, msr.hi = 0x%08x\n",
+	     __func__, msr2.lo, msr2.hi);
+
+	/* refer to UMA Size Consideration in 780 BDG. */
+	switch (msr.lo) {
+	case 0x10000000:	/* 256M system memory */
+		uma_memory_size = 0x4000000;	/* 64M recommended UMA */
+		break;
+
+	case 0x20000000:	/* 512M system memory */
+		uma_memory_size = 0x8000000;	/* 128M recommended UMA */
+		break;
+
+	default:		/* 1GB and above system memory */
+		uma_memory_size = 0x10000000;	/* 256M recommended UMA */
+		break;
+	}
+
+	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 = 0x8000000;	/* 128M recommended UMA */
+	uma_memory_base = 0x38000000;	/* 1GB  system memory supposed */
+#endif
+}
+
 static void amdfam10_domain_set_resources(device_t dev)
 {
 #if CONFIG_PCI_64BIT_PREF_MEM
-- 
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