diff options
Diffstat (limited to 'src/soc/amd/picasso/data_fabric.c')
| -rw-r--r-- | src/soc/amd/picasso/data_fabric.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/soc/amd/picasso/data_fabric.c b/src/soc/amd/picasso/data_fabric.c index 79fdba1267..f576d89857 100644 --- a/src/soc/amd/picasso/data_fabric.c +++ b/src/soc/amd/picasso/data_fabric.c @@ -167,3 +167,23 @@ static const struct pci_driver data_fabric_driver __pci_driver = { .vendor = PCI_VENDOR_ID_AMD, .devices = pci_device_ids, }; + +uint32_t data_fabric_read_reg32(uint8_t function, uint16_t reg, uint8_t instance_id) +{ + uint32_t fabric_indirect_access_reg = 0; + + if (instance_id == BROADCAST_FABRIC_ID) + /* No bit masking required. Macros will apply mask to values. */ + return pci_read_config32(_SOC_DEV(DF_DEV, function), reg); + + fabric_indirect_access_reg |= DF_IND_CFG_INST_ACC_EN; + /* Register offset field [10:2] in this register corresponds to [10:2] of the + requested offset. */ + fabric_indirect_access_reg |= reg & DF_IND_CFG_ACC_REG_MASK; + fabric_indirect_access_reg |= + (function << DF_IND_CFG_ACC_FUN_SHIFT) & DF_IND_CFG_ACC_FUN_MASK; + fabric_indirect_access_reg |= instance_id << DF_IND_CFG_INST_ID_SHIFT; + pci_write_config32(SOC_DF_F4_DEV, DF_FICAA_BIOS, fabric_indirect_access_reg); + + return pci_read_config32(SOC_DF_F4_DEV, DF_FICAD_LO); +} |