AM275X Ring Accelerator Device Descriptions

Introduction

This chapter provides information on the Ring Accelerator devices in the AM275X SoC. Some System Firmware TISCI messages take device specific inputs. This chapter provides information on the valid values for Ring Accelerator TISCI message parameters.

Ring Accelerator Device IDs

Some System Firmware TISCI message APIs require the Ring Accelerator device ID be provided as part of the request. Based on AM275X Device IDs these are the valid Ring Accelerator device IDs.

Ring Accelerator Device Name	Ring Accelerator Device ID
AM275X_DEV_DMASS0_BCDMA_0	26
AM275X_DEV_DMASS0_PKTDMA_0	30
AM275X_DEV_DMASS0_RINGACC_0	33

Ring Accelerator Ring Indices

This section describes valid Ring Accelerator ring indices for each ring type. The ring index and type ID are used in some Ring Accelerator based TISCI messages.

Warning

Resources marked as reserved for use by TIFS cannot be assigned to a host within the RM Board Configuration resource assignment array. The RM Board Configuration is rejected if an overlap with a reserved resource is detected.

DMASS0_BCDMA_0

Ring Type	Ring Index Range
BLOCK_COPY_CHAN	0 to 23
SPLIT_TR_TX_CHAN	24 to 71
SPLIT_TR_RX_CHAN	72 to 121

DMASS0_PKTDMA_0

Ring Type	Ring Index Range
UNMAPPED_TX_CHAN	0 to 26
CPSW_TX_CHAN	27 to 90
SAUL_TX_0_CHAN	91 to 98
SAUL_TX_1_CHAN	99 to 106
UNMAPPED_RX_CHAN	107 to 133
CPSW_RX_CHAN	134 to 149
SAUL_RX_0_CHAN	150 to 157
SAUL_RX_1_CHAN	150 to 157
SAUL_RX_2_CHAN	158 to 165
SAUL_RX_3_CHAN	158 to 165

DMASS0_RINGACC_0

Ring Type	Ring Index Range