diff options
| author | Stefan Reinauer <stepan@coresystems.de> | 2010-12-18 23:29:37 +0000 |
|---|---|---|
| committer | Stefan Reinauer <stepan@openbios.org> | 2010-12-18 23:29:37 +0000 |
| commit | cadc54583877db65f33d2db11088d5fae1b77b74 (patch) | |
| tree | 86377962deb6e6b1faa2093828ff7cb3e127120b /src/cpu/x86/smm | |
| parent | 405721d45c8f7cd58c2466e43df8c2aee6f8e714 (diff) | |
SMM for AMD K8 Part 1/2
Signed-off-by: Stefan Reinauer <stepan@coresystems.de>
Acked-by: Stefan Reinauer <stepan@coresystems.de>
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@6201 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
Diffstat (limited to 'src/cpu/x86/smm')
| -rw-r--r-- | src/cpu/x86/smm/smihandler.c | 22 | ||||
| -rw-r--r-- | src/cpu/x86/smm/smmrelocate.S | 4 |
2 files changed, 25 insertions, 1 deletions
diff --git a/src/cpu/x86/smm/smihandler.c b/src/cpu/x86/smm/smihandler.c index 3dddf6c8ae..bdaedf8dbc 100644 --- a/src/cpu/x86/smm/smihandler.c +++ b/src/cpu/x86/smm/smihandler.c @@ -87,6 +87,24 @@ static void smi_set_eos(void) southbridge_smi_set_eos(); } +static u32 pci_orig; + +/** + * @brief Backup PCI address to make sure we do not mess up the OS + */ +static void smi_backup_pci_address(void) +{ + pci_orig = inl(0xcf8); +} + +/** + * @brief Restore PCI address previously backed up + */ +static void smi_restore_pci_address(void) +{ + outl(pci_orig, 0xcf8); +} + /** * @brief Interrupt handler for SMI# * @@ -107,6 +125,8 @@ void smi_handler(u32 smm_revision) return; } + smi_backup_pci_address(); + node=nodeid(); console_init(); @@ -147,6 +167,8 @@ void smi_handler(u32 smm_revision) if (southbridge_smi_handler) southbridge_smi_handler(node, &state_save); + smi_restore_pci_address(); + smi_release_lock(); /* De-assert SMI# signal to allow another SMI */ diff --git a/src/cpu/x86/smm/smmrelocate.S b/src/cpu/x86/smm/smmrelocate.S index b1f3290f50..e477830cf1 100644 --- a/src/cpu/x86/smm/smmrelocate.S +++ b/src/cpu/x86/smm/smmrelocate.S @@ -22,6 +22,8 @@ // Make sure no stage 2 code is included: #define __PRE_RAM__ +#if !defined(CONFIG_NORTHBRIDGE_AMD_AMDK8) && !defined(CONFIG_NORTHBRIDGE_AMD_FAM10) + // FIXME: Is this piece of code southbridge specific, or // can it be cleaned up so this include is not required? // It's needed right now because we get our DEFAULT_PMBASE from @@ -177,4 +179,4 @@ smm_relocate: /* That's it. return */ rsm smm_relocation_end: - +#endif |