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>
diff --git a/src/northbridge/amd/agesa/family14/northbridge.c b/src/northbridge/amd/agesa/family14/northbridge.c
index a03939c..875dbbb 100644
--- a/src/northbridge/amd/agesa/family14/northbridge.c
+++ b/src/northbridge/amd/agesa/family14/northbridge.c
@@ -524,24 +524,12 @@
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 Family14h BKDG. */
- sys_mem = msr.lo + 0x1000000; // Ignore 16MB allocated for C6 when finding UMA size, refer MemNGetUmaSizeON()
- if ((msr.hi & 0x0000000F) || (sys_mem >= 0x80000000)) {
+ sys_mem = topmem + 0x1000000; // Ignore 16MB allocated for C6 when finding UMA size, refer MemNGetUmaSizeON()
+ if ((bsp_topmem2()>>32) || (sys_mem >= 0x80000000)) {
uma_memory_size = 0x18000000; /* >= 2G memory, 384M recommended UMA */
}
else {
@@ -552,11 +540,9 @@
}
}
- 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
}
@@ -578,6 +564,7 @@
u32 reset_memhole = 1;
#endif
+ setup_bsp_ramtop();
setup_uma_memory();
#if CONFIG_PCI_64BIT_PREF_MEM