diff options
Diffstat (limited to 'src/soc/amd/common/block/data_fabric/data_fabric_helper.c')
| -rw-r--r-- | src/soc/amd/common/block/data_fabric/data_fabric_helper.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/soc/amd/common/block/data_fabric/data_fabric_helper.c b/src/soc/amd/common/block/data_fabric/data_fabric_helper.c index e784d508ff..d65bc8dac6 100644 --- a/src/soc/amd/common/block/data_fabric/data_fabric_helper.c +++ b/src/soc/amd/common/block/data_fabric/data_fabric_helper.c @@ -3,6 +3,7 @@ #include <amdblocks/data_fabric.h> #include <amdblocks/pci_devs.h> #include <device/pci_ops.h> +#include <soc/data_fabric.h> #include <soc/pci_devs.h> #include <types.h> #include "data_fabric_def.h" @@ -40,3 +41,26 @@ void data_fabric_write32(uint8_t function, uint16_t reg, uint8_t instance_id, ui data_fabric_set_indirect_address(function, reg, instance_id); pci_write_config32(SOC_DF_F4_DEV, DF_FICAD_LO, data); } + +void data_fabric_disable_mmio_reg(unsigned int reg) +{ + data_fabric_broadcast_write32(0, NB_MMIO_CONTROL(reg), + IOMS0_FABRIC_ID << MMIO_DST_FABRIC_ID_SHIFT); + data_fabric_broadcast_write32(0, NB_MMIO_BASE(reg), 0); + data_fabric_broadcast_write32(0, NB_MMIO_LIMIT(reg), 0); +} + +static bool is_mmio_reg_disabled(unsigned int reg) +{ + uint32_t val = data_fabric_broadcast_read32(0, NB_MMIO_CONTROL(reg)); + return !(val & (MMIO_WE | MMIO_RE)); +} + +int data_fabric_find_unused_mmio_reg(void) +{ + for (unsigned int i = 0; i < NUM_NB_MMIO_REGS; i++) { + if (is_mmio_reg_disabled(i)) + return i; + } + return -1; +} |