diff options
Diffstat (limited to 'src/soc/intel/skylake/romstage/systemagent.c')
| -rw-r--r-- | src/soc/intel/skylake/romstage/systemagent.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/soc/intel/skylake/romstage/systemagent.c b/src/soc/intel/skylake/romstage/systemagent.c index a262462a09..0c8e9e7b9e 100644 --- a/src/soc/intel/skylake/romstage/systemagent.c +++ b/src/soc/intel/skylake/romstage/systemagent.c @@ -18,8 +18,28 @@ #include <device/device.h> #include <intelblocks/systemagent.h> #include <soc/iomap.h> +#include <soc/pci_devs.h> #include <soc/romstage.h> #include <soc/systemagent.h> +#include "chip.h" + +static void systemagent_vtd_init(void) +{ + const struct device *const dev = dev_find_slot(0, SA_DEVFN_ROOT); + const struct soc_intel_skylake_config *config = NULL; + + if (dev) + config = dev->chip_info; + if (config && config->ignore_vtd) + return; + + const bool vtd_capable = + !(pci_read_config32(SA_DEV_ROOT, CAPID0_A) & VTD_DISABLE); + if (!vtd_capable) + return; + + sa_set_mch_bar(soc_vtd_resources, ARRAY_SIZE(soc_vtd_resources)); +} void systemagent_early_init(void) { @@ -40,6 +60,9 @@ void systemagent_early_init(void) /* Set Fixed MMIO address into MCH base address */ sa_set_mch_bar(soc_fixed_mch_resources, ARRAY_SIZE(soc_fixed_mch_resources)); + + systemagent_vtd_init(); + /* Enable PAM registers */ enable_pam_region(); } |