Kyösti Mälkki (kyosti.malkki@gmail.com) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/17712
-gerrit
commit 41949e96b3ecad6849e06da25aa826136a57393b Author: Kyösti Mälkki kyosti.malkki@gmail.com 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 kyosti.malkki@gmail.com --- 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());