Intel PCI-X, Intel Gigabit Ethernet Controllers manual Hcd

Register Descriptions

Table 13-37. PHY Interrupt Status Bit Description

Field	Bit(s)		Description	Mode	HW Rst	SW Rst
FIFO Over/Underflow	7	1b	= Over/Underflow Error.	RO,	0b	0b
		0b	= No FIFO Error.	LH
False Carrier	8	1b	= False carrier.	RO,	0b	0b
		0b	= No false carrier.	LH
Symbol Error	9	1b	= Symbol error.	RO,	0b	0b
		0b	= No symbol error.	LH
Link Status Changed	10	1b	= Link status changed.	RO,	0b	0b
		0b	= Link status not changed.	LH
Auto-Negotiation	11	1b = Auto-Negotiation completed.		RO,	0b	0b
Completed		0b = Auto-Negotiation not completed.		LH
Page Received	12	1b	= Page received.	RO,	0b	0b
		0b	= Page not received.	LH
Duplex Changed	13	1b	= Duplex changed.	RO,	0b	0b
		0b	= Duplex not changed.	LH
Speed Changed	14	1b	= Speed changed.	RO,	0b	0b
		0b	= Speed not changed.	LH
		1b	= Auto-Negotiation Error.
		0b	= No Auto-Negotiation Error.
Auto-Negotiation	15	An error occurs if MASTER/SLAVE		RO,	0b	0b
		does not resolve, parallel detect fault,
Error				LH
		no common HCD, or link does not
		validate after negotiation has
		completed.

PHY Link Health Register (82541xx and 82547GI/EI Only)

PLINK (19d; R)

Table 13-38. PHY Link Health Register Bit Description

Field	Bit(s)	Description	Mode	HW Rst	SW Rst
Valid Channel A	0	The channel A DSP had converged to	RO	0b	0b
		incoming data.
Valid Channel B	1	The channel B DSP had converged to	RO	0b	0b
		incoming data.
Valid Channel C	2	The channel C DSP had converged to	RO	0b	0b
		incoming data.
Valid Channel D	3	The channel D DSP had converged to	RO	0b	0b
		incoming data.
Auto-Negotiation	4	Auto-Negotiate is actively deciding	RO	0b	0b
Active		HCD.
Reserved	5	Always read as 0b.	RO	0b	0b

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