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Diffstat (limited to 'src/northbridge/amd/amdk8')
-rw-r--r--src/northbridge/amd/amdk8/raminit.c38
1 files changed, 33 insertions, 5 deletions
diff --git a/src/northbridge/amd/amdk8/raminit.c b/src/northbridge/amd/amdk8/raminit.c
index 9e0ebfb2cd..563064b13f 100644
--- a/src/northbridge/amd/amdk8/raminit.c
+++ b/src/northbridge/amd/amdk8/raminit.c
@@ -2226,6 +2226,12 @@ static void sdram_enable(int controllers, const struct mem_controller *ctrl)
#endif
{
int i;
+ u32 whatWait = 0;
+#if CONFIG_HAVE_ACPI_RESUME == 1
+ int suspend = acpi_is_wakeup_early();
+#else
+ int suspend = 0;
+#endif
/* Error if I don't have memory */
if (memory_end_k(ctrl, controllers) == 0) {
@@ -2277,13 +2283,31 @@ static void sdram_enable(int controllers, const struct mem_controller *ctrl)
}
pci_write_config32(ctrl[i].f3, MCA_NB_CONFIG, mnc);
}
- dcl |= DCL_DisDqsHys;
- pci_write_config32(ctrl[i].f2, DRAM_CONFIG_LOW, dcl);
+
+ if (!suspend) {
+ dcl |= DCL_DisDqsHys;
+ pci_write_config32(ctrl[i].f2, DRAM_CONFIG_LOW, dcl);
+ }
dcl &= ~DCL_DisDqsHys;
dcl &= ~DCL_DLL_Disable;
dcl &= ~DCL_D_DRV;
dcl &= ~DCL_QFC_EN;
- dcl |= DCL_DramInit;
+
+ if (suspend) {
+ enable_lapic();
+ init_timer();
+ dcl |= (DCL_ESR | DCL_SRS);
+ /* Handle errata 85 Insufficient Delay Between MEMCLK Startup
+ and CKE Assertion During Resume From S3 */
+ udelay(10); /* for unregistered */
+ if (is_registered(&ctrl[i])) {
+ udelay(100); /* 110us for registered (we wait 10us already) */
+ }
+ whatWait = DCL_ESR;
+ } else {
+ dcl |= DCL_DramInit;
+ whatWait = DCL_DramInit;
+ }
pci_write_config32(ctrl[i].f2, DRAM_CONFIG_LOW, dcl);
}
@@ -2305,7 +2329,7 @@ static void sdram_enable(int controllers, const struct mem_controller *ctrl)
if ((loops & 1023) == 0) {
printk(BIOS_DEBUG, ".");
}
- } while(((dcl & DCL_DramInit) != 0) && (loops < TIMEOUT_LOOPS));
+ } while(((dcl & whatWait) != 0) && (loops < TIMEOUT_LOOPS));
if (loops >= TIMEOUT_LOOPS) {
printk(BIOS_DEBUG, " failed\n");
continue;
@@ -2313,11 +2337,15 @@ static void sdram_enable(int controllers, const struct mem_controller *ctrl)
if (!is_cpu_pre_c0()) {
/* Wait until it is safe to touch memory */
+#if 0
+ /* the registers are marked read-only but code zeros them */
dcl &= ~(DCL_MemClrStatus | DCL_DramEnable);
pci_write_config32(ctrl[i].f2, DRAM_CONFIG_LOW, dcl);
+#endif
do {
dcl = pci_read_config32(ctrl[i].f2, DRAM_CONFIG_LOW);
- } while(((dcl & DCL_MemClrStatus) == 0) || ((dcl & DCL_DramEnable) == 0) );
+ } while(((dcl & DCL_MemClrStatus) == 0) || ((dcl & DCL_DramEnable) == 0) ||
+ ((dcl & DCL_SRS)));
}
printk(BIOS_DEBUG, " done\n");