VSC7440 datasheet(147/444 Pages) MICROSEMI

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Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

130

The following illustration depicts the TUPE functionality.

Figure 28 •

VLAN Table Update Engine (TUPE)

The following pseudo code shows the full algorithm used by TUPE.

for (addr = csr.tupe_start_addr; addr < csr.tupe_end_addr; addr++) {

vlan_entry = vlan_tbl[addr];

if (

(// If enabled, check matching value

!csr.tupe_ctrl_val_ena

((vlan_entry.tupe_ctrl & csr.tupe_ctrl_val_mask) == csr.tupe_ctrl_val))

(// If enabled, check if VLAN's tupe_ctrl has any bits overlapping

// with csr.tupe_CTRL_BIT_MASK

!csr.tupe_ctrl_bit_ena

((vlan_entry.tupe_ctrl & csr.tupe_ctrl_bit_mask) != 0))

(// If enabled, check if VLAN's vlan_port_mask has any bits overlapping

// with csr.tupe_PORT_MASK_A

!csr.tupe_port_mask_a_ena

((vlan_entry.vlan_port_mask & csr.tupe_port_mask_a) != 0))

(// Combined mode

// If enabled, check if VLAN's tupe_ctrl has any bits overlapping

// with TUPE_CTRL_BIT_MASK or VLAN's vlan_port_mask has any bits

// overlapping with TUPE_PORT_MASK_A

// I.e. the bit mask part of TUPE_CTRL is extended with bits from

// vlan_port_maks.

!csr.tupe_comb_mask_ena

((vlan_entry.tupe_ctrl & csr.tupe_ctrl_bit_mask) != 0)

((vlan_entry.vlan_port_mask & csr.tupe_port_mask_a) != 0))

(// If enabled, check if VLAN's vlan_port_mask has any bits overlapping

// with csr.tupe_PORT_MASK_B

VLAN Table (ANA_L3:VLAN)

Value part

Bit part

TUPE_CTRL

Unused bits

Used bits

(physical ports)

VLAN_PORT_MASK

...

TUPE Algorithm

TUPE

Command

Parameters

(ANA_L3:TUPE)

TUPE_START_ADDR

TUPE_END_ADDR

Possibly new value of

VLAN_PORT_MASK

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