AMD northbridge: copy TOP_MEM and TOP_MEM2 for distribution

Take a copy of BSP CPU's TOP_MEM and TOP_MEM2 MSRs to be distributed
to AP CPUs and factor out the debugging info from setup_uma_memory().

Change-Id: I1acb4eaa3fe118aee223df1ebff997289f5d3a56
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/1387
Tested-by: build bot (Jenkins)
Reviewed-by: Zheng Bao <zheng.bao@amd.com>
Reviewed-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>

1 files changed, 5 insertions, 18 deletions

diff --git a/src/northbridge/amd/agesa/family12/northbridge.c b/src/northbridge/amd/agesa/family12/northbridge.c
index af1d4f064c..6689e71f88 100644
--- a/src/northbridge/amd/agesa/family12/northbridge.c
+++ b/src/northbridge/amd/agesa/family12/northbridge.c
@@ -476,21 +476,9 @@ static void set_resources(device_t dev)
 static void setup_uma_memory(void)
 {
 #if CONFIG_GFXUMA
-  msr_t msr, msr2;
+  uint32_t topmem = (uint32_t) bsp_topmem();
   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 Family12h BKDG. */
   /* Please reference MemNGetUmaSizeLN () */
   /*
@@ -499,19 +487,17 @@ static void setup_uma_memory(void)
    *     >=1G                  256M
    *     <1G                    64M
    */
-  sys_mem = msr.lo + 0x1000000; // Ignore 16MB allocated for C6 when finding UMA size
-  if ((msr.hi & 0x0000000F) || (sys_mem >= 0x80000000)) {
+  sys_mem = topmem + 0x1000000; // Ignore 16MB allocated for C6 when finding UMA size
+  if ((bsp_topmem2()>>32) || (sys_mem >= 0x80000000)) {
     uma_memory_size = 0x20000000;	/* >= 2G memory, 512M 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 */
+  uma_memory_base = topmem - 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 */
 #endif
 }
 
@@ -615,6 +601,7 @@ static void domain_set_resources(device_t dev)
     u32 reset_memhole = 1;
 #endif
 
+	setup_bsp_ramtop();
 	setup_uma_memory();
 
 #if CONFIG_PCI_64BIT_PREF_MEM