openenoc_switch address map

  • Absolute Address: 0x0

  • Base Offset: 0x0

  • Size: 0x20

Control and status register map for an openENOC Switch instance. It includes configuration registers and a forwarding table used to map destination MAC address keys to output interface selections for frame forwarding.

Offset

Identifier

Name

0x00

info

openenoc_switch.info

0x04

forwarding_control

openenoc_switch.forwarding_control

0x08

default_forwarding

openenoc_switch.default_forwarding

0x10

forwarding_table

openenoc_switch.forwarding_table

info register

  • Absolute Address: 0x0

  • Base Offset: 0x0

  • Size: 0x4

Read-only information register for this openENOC Switch instance.

Bits

Identifier

Access

Reset

Name

15:0

table_depth

r

0x1

openenoc_switch.info.table_depth[15:0]

21:16

num_of_interfaces

r

0x1

openenoc_switch.info.num_of_interfaces[21:16]

table_depth field

Depth of the forwarding table in this openENOC Switch instance. This field reflects the TABLE_DEPTH parameter value.

num_of_interfaces field

Number of interfaces in this openENOC Switch instance. This field reflects the NUM_OF_INTERFACES parameter value.

forwarding_control register

  • Absolute Address: 0x4

  • Base Offset: 0x4

  • Size: 0x4

Forwarding control register for the openENOC Switch instance.

Bits

Identifier

Access

Reset

Name

0

operation_mode

rw

0x0

openenoc_switch.forwarding_control.operation_mode[0:0]

7

pause_request

rw

0x0

openenoc_switch.forwarding_control.pause_request[7:7]

15

pause_done

r

—

openenoc_switch.forwarding_control.pause_done[15:15]

operation_mode field

Mode of operation for the openENOC Switch instance. When set to 1, the switch operates in managed mode, allowing software to configure the forwarding table and control forwarding operations. When set to 0, the switch operates in unmanaged mode, where forwarding state is maintained autonomously by internal hardware logic without software intervention.

pause_request field

Pause request for the forwarding logic. When set, this field requests the switch to pause frame forwarding and clear its internal pipeline before forwarding table updates are performed.

pause_done field

Pause done status. When set, this field indicates that the switch has paused frame forwarding and reached a safe state for forwarding table modification.

default_forwarding register

  • Absolute Address: 0x8

  • Base Offset: 0x8

  • Size: 0x4

Defines the destination interface or interfaces for frames that do not match any enabled forwarding table entry.

Bits

Identifier

Access

Reset

Name

0

bitmap

rw

0x0

openenoc_switch.default_forwarding.bitmap[NUM_OF_INTERFACES-1:0]

bitmap field

Bitmap selecting the output interface or interfaces to which frames that do not match any enabled forwarding table entry are forwarded. Bit NUM_OF_INTERFACES-1, the MSB, corresponds to the first interface; bit 0 corresponds to the last interface.

forwarding_table register file

  • Absolute Address: 0x10

  • Base Offset: 0x10

  • Size: 0x10

Forwarding table used to map MAC addresses to output interface selections for frame forwarding.

Offset

Identifier

Name

0x0

entry[0]

openenoc_switch.forwarding_table.entry[0..TABLE_DEPTH-1]

entry register file

  • Absolute Address: 0x10

  • Base Offset: 0x0

  • Size: 0x10

  • Array Dimensions: [1]

  • Array Stride: 0x10

  • Total Size: 0x10

Forwarding table entry containing the MAC address key, output interface selection, and entry configuration.

Offset

Identifier

Name

0x0

mac_address

openenoc_switch.forwarding_table.entry[0..TABLE_DEPTH-1].mac_address

0x8

iface

openenoc_switch.forwarding_table.entry[0..TABLE_DEPTH-1].iface

0xC

config

openenoc_switch.forwarding_table.entry[0..TABLE_DEPTH-1].config

mac_address register

  • Absolute Address: 0x10

  • Base Offset: 0x0

  • Size: 0x8

48-bit destination MAC address used as the key for this forwarding table entry.

Bits

Identifier

Access

Reset

Name

31:0

lo_word

rw

—

openenoc_switch.forwarding_table.entry[0..TABLE_DEPTH-1].mac_address.lo_word[31:0]

47:32

hi_word

rw

—

openenoc_switch.forwarding_table.entry[0..TABLE_DEPTH-1].mac_address.hi_word[47:32]

lo_word field

Lower 32 bits [31:0] of the 48-bit MAC address stored in this forwarding table entry.

hi_word field

Upper 16 bits [47:32] of the 48-bit MAC address stored in this forwarding table entry.

iface register

  • Absolute Address: 0x18

  • Base Offset: 0x8

  • Size: 0x4

Forwarding interface information associated with this forwarding table entry.

Bits

Identifier

Access

Reset

Name

0

bitmap

rw

—

openenoc_switch.forwarding_table.entry[0..TABLE_DEPTH-1].iface.bitmap[NUM_OF_INTERFACES-1:0]

bitmap field

Bitmap selecting the output interface or interfaces to which a matching frame is forwarded. Bit NUM_OF_INTERFACES-1, the MSB, corresponds to the first interface; bit 0 corresponds to the last interface.

config register

  • Absolute Address: 0x1C

  • Base Offset: 0xC

  • Size: 0x4

Configuration information associated with this forwarding table entry.

Bits

Identifier

Access

Reset

Name

0

enabled

rw

—

openenoc_switch.forwarding_table.entry[0..TABLE_DEPTH-1].config.enabled

enabled field

Enables this forwarding table entry. When cleared, the entry is ignored during forwarding table lookup.