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authorKyösti Mälkki <kyosti.malkki@gmail.com>2012-07-11 08:01:35 +0300
committerPatrick Georgi <patrick@georgi-clan.de>2012-07-16 18:43:35 +0200
commit03548aa6b849e94037aa2c2da0ef36d27267d554 (patch)
tree4c131c4081464b9e52e092459af8cf66e5f96745 /src/northbridge
parentcc55b9b9199657834a946ea2de059c3fab3e3b10 (diff)
downloadcoreboot-03548aa6b849e94037aa2c2da0ef36d27267d554.tar.xz
Move setup_uma_memory() to Agesa Family15 northbridge
Change-Id: I5705623f5067823fae5986b3bcde58504a463508 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: http://review.coreboot.org/1206 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
Diffstat (limited to 'src/northbridge')
-rw-r--r--src/northbridge/amd/agesa/family15/northbridge.c48
1 files changed, 48 insertions, 0 deletions
diff --git a/src/northbridge/amd/agesa/family15/northbridge.c b/src/northbridge/amd/agesa/family15/northbridge.c
index d9da183bc0..c6cbbede3e 100644
--- a/src/northbridge/amd/agesa/family15/northbridge.c
+++ b/src/northbridge/amd/agesa/family15/northbridge.c
@@ -31,6 +31,7 @@
#include <cbmem.h>
#include <cpu/x86/lapic.h>
+#include <cpu/amd/mtrr.h>
#include <Porting.h>
#include <AGESA.h>
@@ -626,6 +627,53 @@ static struct hw_mem_hole_info get_hw_mem_hole_info(void)
}
#endif
+#define ONE_MB 0x100000
+
+void setup_uma_memory(void)
+{
+#if CONFIG_GFXUMA
+ 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 Family15h BKDG. */
+ /* Please reference MemNGetUmaSizeOR () */
+ /*
+ * Total system memory UMASize
+ * >= 2G 512M
+ * >=1G 256M
+ * <1G 64M
+ */
+ sys_mem = msr.lo + 16 * ONE_MB; // Ignore 16MB allocated for C6 when finding UMA size
+ if ((msr2.hi & 0x0000000F) || (sys_mem >= 2048 * ONE_MB)) {
+ uma_memory_size = 512 * ONE_MB;
+ } else if (sys_mem >= 1024 * ONE_MB) {
+ uma_memory_size = 256 * ONE_MB;
+ } else {
+ uma_memory_size = 64 * ONE_MB;
+ }
+ 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 = 256 * ONE_MB; /* 256M recommended UMA */
+ uma_memory_base = 768 * ONE_MB; /* 1GB system memory supported */
+#endif
+}
+
static void domain_set_resources(device_t dev)
{
#if CONFIG_PCI_64BIT_PREF_MEM