summaryrefslogtreecommitdiff
path: root/src/northbridge/amd
diff options
context:
space:
mode:
authorKyösti Mälkki <kyosti.malkki@gmail.com>2012-07-11 08:02:57 +0300
committerPatrick Georgi <patrick@georgi-clan.de>2012-07-16 18:45:37 +0200
commit231f2614021967c9645d9e5b83dbea2089600be3 (patch)
treeeeb6529641384e8003e19213797d12feb925ecf7 /src/northbridge/amd
parent55fff930ce01aff16dfd24cf0d446a3a181dd6f7 (diff)
downloadcoreboot-231f2614021967c9645d9e5b83dbea2089600be3.tar.xz
Move setup_uma_memory() to AMDFAM10 northbridge
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>
Diffstat (limited to 'src/northbridge/amd')
-rw-r--r--src/northbridge/amd/amdfam10/northbridge.c44
1 files changed, 44 insertions, 0 deletions
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