VSC7440 datasheet(217/444 Pages) MICROSEMI

217 / 444 page

Functional Descriptions

VMDS-10492 VSC7440 Datasheet Revision 4.2

200

be read first, and the MSB part must be read immediately after the LSB part. When writing to the counter,

the LSB part must be written first, followed by the MSB part.

The following pseudo code shows the port statistics functionality.

for (port_counter_idx = 0; port_counter_idx < 4; port_counter_idx++) {

(STAT_CNT_CFG_PORT[frame.igr_port].STAT_CFG[port_counter_idx].CFG_PRIO_MASK[

frame.prio]) {

count = FALSE;

global_event_mask =

STAT_GLOBAL_EVENT_MASK[port_counter_idx].GLOBAL_EVENT_MASK;

event_match = (STAT_GLOBAL_EVENT_MASK[port_counter_idx].GLOBAL_EVENT_MASK

frame.event_mask);

switch

(STAT_CNT_CFG_PORT[frame.igr_port].STAT_CFG[port_counter_idx].CFG_CNT_FRM_TY

PE) {

case 0x0:

if (!frame.error && !event_match) count = 1;

break;

case 0x1:

if (!frame.error && event_match) count = 1;

break;

case 0x2:

if (frame.error && event_match) count = 1;

break;

case 0x3:

if (event_match) count = 1;

break;

case 0x4:

if (frame.error && !event_match) count = 1;

break;

case 0x5:

if (frame.error) count = 1;

break;

}

if (count) {

(STAT_CNT_CFG_PORT[frame.igr_port].STAT_CFG[port_counter_idx].CFG_CNT_BYTE) {

STAT_xSB_CNT[port_counter_idx] += frame.bytes;

} else {

STAT_xSB_CNT[port_counter_idx]++;

}

Example: To set up port counter 3 to count bytes filtered by VLAN ingress filter, the following

configuration is required.

•

Enable VLAN drop events as global event 3:

Set

ANA_L3:L3_STICKY_MASK:VLAN_MSTP_STICKY_MASK[3].VLAN_IGR_FILTER_STICKY_MAS

K= 1.

•

Initialize counters:

Set ANA_AC:STAT_GLOBAL_CFG_PORT:STAT_RESET.RESET = 1.

•

Set up port counters. For each active Ethernet port:

Set ANA_AC:STAT_CNT_CFG_PORT[port].STAT_CFG[3].CFG_CNT_FRM_TYPE = 3.

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