New patch to review for coreboot: intel 82801dx/gx/ix: Commit SMM relocation code to DRAM

[Kyösti Mälkki]

Kyösti Mälkki ([e-mail]) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/17712

-gerrit

commit 881b9296472d2a54c487359cc26ff88396102e13
Author: Kyösti Mälkki 
Date:   Sun Dec 4 22:17:37 2016 +0200

intel 82801dx/gx/ix: Commit SMM relocation code to DRAM

Make sure relocation code reaches DRAM before issuing any
    SMIs. Snooping and cache coherency may have undefined
    behaviour as CPUs do not have uniform MTRR layout yet.

Change-Id: I47a7d684e05ff8c1c2f1f6a5bf8c0bbc561d9eac
    Signed-off-by: Kyösti Mälkki 
---
 src/southbridge/intel/i82801dx/smi.c | 1 +
 src/southbridge/intel/i82801gx/smi.c | 1 +
 src/southbridge/intel/i82801ix/smi.c | 1 +
 3 files changed, 3 insertions(+)

diff --git a/src/southbridge/intel/i82801dx/smi.c b/src/southbridge/intel/i82801dx/smi.c
index e8b8ce7..71ef5fd 100644
--- a/src/southbridge/intel/i82801dx/smi.c
+++ b/src/southbridge/intel/i82801dx/smi.c
@@ -252,6 +252,7 @@ static void smm_relocate(void)
    /* copy the SMM relocation code */
    memcpy((void *)0x38000, &smm_relocation_start,
    		&smm_relocation_end - &smm_relocation_start);
+	wbinvd();

printk(BIOS_DEBUG, "\n");
    dump_smi_status(reset_smi_status());
diff --git a/src/southbridge/intel/i82801gx/smi.c b/src/southbridge/intel/i82801gx/smi.c
index 01fbbfb..3487aab 100644
--- a/src/southbridge/intel/i82801gx/smi.c
+++ b/src/southbridge/intel/i82801gx/smi.c
@@ -252,6 +252,7 @@ static void smm_relocate(void)
    /* copy the SMM relocation code */
    memcpy((void *)0x38000, &smm_relocation_start,
    		&smm_relocation_end - &smm_relocation_start);
+	wbinvd();

printk(BIOS_DEBUG, "\n");
    dump_smi_status(reset_smi_status());
diff --git a/src/southbridge/intel/i82801ix/smi.c b/src/southbridge/intel/i82801ix/smi.c
index dd0915a..358a1a9 100644
--- a/src/southbridge/intel/i82801ix/smi.c
+++ b/src/southbridge/intel/i82801ix/smi.c
@@ -256,6 +256,7 @@ static void smm_relocate(void)
    /* copy the SMM relocation code */
    memcpy((void *)0x38000, &smm_relocation_start,
    		&smm_relocation_end - &smm_relocation_start);
+	wbinvd();

printk(BIOS_DEBUG, "\n");
    dump_smi_status(reset_smi_status());