Firmware Mailbox; Table 77: Example Of Splitting 10/100 Mbps Frame Data In Pattern Data Structure - Broadcom NetXtreme/NetLink BCM5718 Series Programmer's Manual

BCM5718 Programmer's Guide
Table 76: Frame Control Field for 10/100 Mbps Mode (Cont.)
Bits Field
58 S1 Low Byte Enable
57 S2 High Byte Enable
56 S2 Low Byte Enable
55:51 Reserved
50 S0 Done
49 S1 Done
48 S2 Done
Table 77 shows an example of how 10/100 Mbps frame data is split up in the pattern data structure. Eight
streams are compared simultaneously with three 64-bit rows comprising one WOL entry. Rows 0–2 compare
frame data0 against eight rules. Rows 3–5 compare frame data1 against the next eight rules. Rows 6–9
compare data2 against the final eight rules. The eight rules may be uniquely defined for all three WOL entries.

Table 77: Example of Splitting 10/100 Mbps Frame Data in Pattern Data Structure

Data[63:48]
Control Bits
Control Bits
Control Bits
Control Bits
Control Bits
Control Bits
Control Bits
Control Bits
Control Bits

Firmware Mailbox

When the Ethernet controller initializes (the firmware boot code is loaded from NVRAM when the chip powers
on or when reset completes), the boot code checks the T3_FIRMWARE_MAILBOX in shared memory. When
the T3_MAGIC_NUM signature (0x4B657654) is present, the boot code does not issue a hard reset to the PHY.
This is especially important in WOL mode since the PHY should not be reset.
Before the host software issues a reset to the Ethernet controller, it must write the T3_MAGIC_NUM to the
shared memory address T3_FIRMWARE_MAILBOX (0xb50). This address is a software mailbox, which boot
code polls before it resets the PHY. The boot code will acknowledge the signature by writing the one's
complement of the T3_MAGIC_NUM back into the T3_FIRMWARE_MAILBOX. If the T3_MAGIC_NUM is
present, the boot code will not reset the PHY. After resetting the Ethernet controller, host software should poll
for the one's complement of the T3_MAGIC_NUM before it proceeds, otherwise, boot code initialization may
interfere with the host software initialization.
Broadcom
®
January 29, 2016 • 5718-PG108-R
Description
Enable S1 lower byte for comparison
Enable S2 higher byte for comparison
Enable S2 lower byte for comparison
–
End of S0 Stream
End of S1 Stream
End of S2 Stream
Data[47:32]
Stream 0 data 0
Stream 3 data 0
Stream 6 data 0
Stream 0 data 1
Stream 3 data 1
Stream 6 data 1
Stream 0 data 2
Stream 3 data 2
Stream 6 data 2
Data[31:16]
Stream 1 data 0
Stream 4 data 0
Stream 7 data 0
Stream 1 data 1
Stream 4 data 1
Stream 7 data 1
Stream 1 data 2
Stream 4 data 2
Stream 7 data 2
Wake on LAN Mode/Low-Power
Access
RW
RW
RW
–
RW
RW
RW
Data[15:0]
Stream 2 data 0
Stream 5 data 0
Stream 8 data 0
Stream 2 data 1
Stream 5 data 1
Stream 8 data 1
Stream 2 data 2
Stream 5 data 2
Stream 8 data 2
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