diff options
Diffstat (limited to 'src/soc/intel/broadwell/early_init.c')
-rw-r--r-- | src/soc/intel/broadwell/early_init.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/src/soc/intel/broadwell/early_init.c b/src/soc/intel/broadwell/early_init.c new file mode 100644 index 0000000000..6bf7ba7a59 --- /dev/null +++ b/src/soc/intel/broadwell/early_init.c @@ -0,0 +1,58 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <device/mmio.h> +#include <device/pci_ops.h> +#include <device/pci_def.h> +#include <soc/iomap.h> +#include <soc/pci_devs.h> +#include <soc/romstage.h> +#include <soc/systemagent.h> + +static void broadwell_setup_bars(void) +{ + /* Set up all hardcoded northbridge BARs */ + pci_write_config32(SA_DEV_ROOT, MCHBAR, MCH_BASE_ADDRESS | 1); + pci_write_config32(SA_DEV_ROOT, DMIBAR, DMI_BASE_ADDRESS | 1); + pci_write_config32(SA_DEV_ROOT, EPBAR, EP_BASE_ADDRESS | 1); + + MCHBAR32(EDRAMBAR) = EDRAM_BASE_ADDRESS | 1; + MCHBAR32(GDXCBAR) = GDXC_BASE_ADDRESS | 1; + + /* Set C0000-FFFFF to access RAM on both reads and writes */ + pci_write_config8(SA_DEV_ROOT, PAM0, 0x30); + pci_write_config8(SA_DEV_ROOT, PAM1, 0x33); + pci_write_config8(SA_DEV_ROOT, PAM2, 0x33); + pci_write_config8(SA_DEV_ROOT, PAM3, 0x33); + pci_write_config8(SA_DEV_ROOT, PAM4, 0x33); + pci_write_config8(SA_DEV_ROOT, PAM5, 0x33); + pci_write_config8(SA_DEV_ROOT, PAM6, 0x33); +} + +void systemagent_early_init(void) +{ + const bool vtd_capable = + !(pci_read_config32(SA_DEV_ROOT, CAPID0_A) & VTD_DISABLE); + + broadwell_setup_bars(); + + /* Device enable: IGD and Mini-HD */ + pci_write_config32(SA_DEV_ROOT, DEVEN, DEVEN_D0EN | DEVEN_D2EN | DEVEN_D3EN); + + if (vtd_capable) { + /* setup BARs: zeroize top 32 bits; set enable bit */ + MCHBAR32(GFXVTBAR + 4) = GFXVT_BASE_ADDRESS >> 32; + MCHBAR32(GFXVTBAR) = GFXVT_BASE_ADDRESS | 1; + MCHBAR32(VTVC0BAR + 4) = VTVC0_BASE_ADDRESS >> 32; + MCHBAR32(VTVC0BAR) = VTVC0_BASE_ADDRESS | 1; + + /* set PRSCAPDIS, lock GFXVTBAR policy cfg registers */ + u32 reg32; + reg32 = read32((void *)(GFXVT_BASE_ADDRESS + ARCHDIS)); + write32((void *)(GFXVT_BASE_ADDRESS + ARCHDIS), + reg32 | DMAR_LCKDN | PRSCAPDIS); + /* lock VTVC0BAR policy cfg registers */ + reg32 = read32((void *)(VTVC0_BASE_ADDRESS + ARCHDIS)); + write32((void *)(VTVC0_BASE_ADDRESS + ARCHDIS), + reg32 | DMAR_LCKDN); + } +} |