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      1 /*	$NetBSD: hmereg.h,v 1.23 2024/02/05 21:46:06 andvar Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1999 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Paul Kranenburg.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 /*
     33  * HME Shared Ethernet Block register offsets
     34  */
     35 #define HME_SEBI_RESET	(0*4)
     36 #define HME_SEBI_CFG	(1*4)
     37 #define HME_SEBI_STAT	(64*4)
     38 #define HME_SEBI_IMASK	(65*4)
     39 
     40 /* HME SEB bits. */
     41 #define HME_SEB_RESET_ETX	0x00000001	/* reset external transmitter */
     42 #define HME_SEB_RESET_ERX	0x00000002	/* reset external receiver */
     43 
     44 #define HME_SEB_CFG_BURSTMASK	0x00000003	/* covers all burst bits */
     45 #define HME_SEB_CFG_BURST16	0x00000000	/* 16 byte bursts */
     46 #define HME_SEB_CFG_BURST32	0x00000001	/* 32 byte bursts */
     47 #define HME_SEB_CFG_BURST64	0x00000002	/* 64 byte bursts */
     48 #define HME_SEB_CFG_64BIT	0x00000004	/* 64-bit CEI/SBus DVMA (94) */
     49 #define HME_SEB_CFG_PARITY	0x00000008	/* DVMA & PIO parity check */
     50 #define HME_SEB_CFG_VERS	0xf0000000	/* ether channel version */
     51 #define HME_SEB_CFG_VERSSHIFT	28
     52 
     53 #define HME_SEB_STAT_GOTFRAME	0x00000001	/* frame received */
     54 #define HME_SEB_STAT_RCNTEXP	0x00000002	/* rx frame count expired */
     55 #define HME_SEB_STAT_ACNTEXP	0x00000004	/* align error count expired */
     56 #define HME_SEB_STAT_CCNTEXP	0x00000008	/* crc error count expired */
     57 #define HME_SEB_STAT_LCNTEXP	0x00000010	/* length error count expired */
     58 #define HME_SEB_STAT_RFIFOVF	0x00000020	/* rx fifo overflow */
     59 #define HME_SEB_STAT_CVCNTEXP	0x00000040	/* code violation counter exp */
     60 #define HME_SEB_STAT_STSTERR	0x00000080	/* xif sqe test failed */
     61 #define HME_SEB_STAT_SENTFRAME	0x00000100	/* frame sent */
     62 #define HME_SEB_STAT_TFIFO_UND	0x00000200	/* tx fifo underrun */
     63 #define HME_SEB_STAT_MAXPKTERR	0x00000400	/* max-packet size error */
     64 #define HME_SEB_STAT_NCNTEXP	0x00000800	/* normal collision count exp */
     65 #define HME_SEB_STAT_ECNTEXP	0x00001000	/* excess collision count exp */
     66 #define HME_SEB_STAT_LCCNTEXP	0x00002000	/* late collision count exp */
     67 #define HME_SEB_STAT_FCNTEXP	0x00004000	/* first collision count exp */
     68 #define HME_SEB_STAT_DTIMEXP	0x00008000	/* defer timer expired */
     69 #define HME_SEB_STAT_RXTOHOST	0x00010000	/* pkt moved from rx fifo->memory */
     70 #define HME_SEB_STAT_NORXD	0x00020000	/* out of receive descriptors */
     71 #define HME_SEB_STAT_RXERR	0x00040000	/* rx DMA error */
     72 #define HME_SEB_STAT_RXLATERR	0x00080000	/* late error during rx DMA */
     73 #define HME_SEB_STAT_RXPERR	0x00100000	/* parity error during rx DMA */
     74 #define HME_SEB_STAT_RXTERR	0x00200000	/* tag error during rx DMA */
     75 #define HME_SEB_STAT_EOPERR	0x00400000	/* tx descriptor did not set EOP */
     76 #define HME_SEB_STAT_MIFIRQ	0x00800000	/* mif needs attention */
     77 #define HME_SEB_STAT_HOSTTOTX	0x01000000	/* pkt moved from memory->tx fifo */
     78 #define HME_SEB_STAT_TXALL	0x02000000	/* all pkts in fifo transmitted */
     79 #define HME_SEB_STAT_TXEACK	0x04000000	/* error during tx DMA */
     80 #define HME_SEB_STAT_TXLERR	0x08000000	/* late error during tx DMA */
     81 #define HME_SEB_STAT_TXPERR	0x10000000	/* parity error during tx DMA */
     82 #define HME_SEB_STAT_TXTERR	0x20000000	/* tag error during tx DMA */
     83 #define HME_SEB_STAT_SLVERR	0x40000000	/* pio access error */
     84 #define HME_SEB_STAT_SLVPERR	0x80000000	/* pio access parity error */
     85 #define HME_SEB_STAT_BITS	"\177\020"				\
     86 			"b\0GOTFRAME\0b\1RCNTEXP\0b\2ACNTEXP\0"		\
     87 			"b\3CCNTEXP\0b\4LCNTEXP\0b\5RFIFOVF\0"		\
     88 			"b\6CVCNTEXP\0b\7STSTERR\0b\10SENTFRAME\0"	\
     89 			"b\11TFIFO_UND\0b\12MAXPKTERR\0b\13NCNTEXP\0"	\
     90 			"b\14ECNTEXP\0b\15LCCNTEXP\0b\16FCNTEXP\0"	\
     91 			"b\17DTIMEXP\0b\20RXTOHOST\0b\21NORXD\0"	\
     92 			"b\22RXERR\0b\23RXLATERR\0b\24RXPERR\0"		\
     93 			"b\25RXTERR\0b\26EOPERR\0b\27MIFIRQ\0"		\
     94 			"b\30HOSTTOTX\0b\31TXALL\0b\32XTEACK\0"		\
     95 			"b\33TXLERR\0b\34TXPERR\0b\35TXTERR\0"		\
     96 			"b\36SLVERR\0b\37SLVPERR\0\0"
     97 
     98 #ifdef HMEDEBUG
     99 #define HME_SEB_STAT_DEBUG_ERRORS	(HME_SEB_STAT_DTIMEXP | HME_SEB_STAT_RFIFOVF)
    100 #else
    101 #define HME_SEB_STAT_DEBUG_ERRORS	0
    102 #endif
    103 
    104 #define HME_SEB_STAT_ALL_ERRORS	\
    105 	(HME_SEB_STAT_SLVPERR  | HME_SEB_STAT_SLVERR  | HME_SEB_STAT_TXTERR   |\
    106 	 HME_SEB_STAT_TXPERR   | HME_SEB_STAT_TXLERR  | HME_SEB_STAT_TXEACK   |\
    107 	 HME_SEB_STAT_EOPERR   | HME_SEB_STAT_RXTERR  | HME_SEB_STAT_RXPERR   |\
    108 	 HME_SEB_STAT_RXLATERR | HME_SEB_STAT_RXERR   | HME_SEB_STAT_NORXD    |\
    109 	 HME_SEB_STAT_FCNTEXP  | HME_SEB_STAT_LCCNTEXP |\
    110 	 HME_SEB_STAT_ECNTEXP  | HME_SEB_STAT_NCNTEXP | HME_SEB_STAT_MAXPKTERR|\
    111 	 HME_SEB_STAT_TFIFO_UND| HME_SEB_STAT_STSTERR | HME_SEB_STAT_CVCNTEXP |\
    112 	 HME_SEB_STAT_LCNTEXP  | HME_SEB_STAT_CCNTEXP |\
    113 	 HME_SEB_STAT_ACNTEXP  | HME_SEB_STAT_DEBUG_ERRORS)
    114 
    115 #define HME_SEB_STAT_VLAN_ERRORS	\
    116 	(HME_SEB_STAT_SLVPERR  | HME_SEB_STAT_SLVERR  | HME_SEB_STAT_TXTERR   |\
    117 	 HME_SEB_STAT_TXPERR   | HME_SEB_STAT_TXLERR  | HME_SEB_STAT_TXEACK   |\
    118 	 HME_SEB_STAT_EOPERR   | HME_SEB_STAT_RXTERR  | HME_SEB_STAT_RXPERR   |\
    119 	 HME_SEB_STAT_RXLATERR | HME_SEB_STAT_RXERR   | HME_SEB_STAT_NORXD    |\
    120 	 HME_SEB_STAT_DTIMEXP  | HME_SEB_STAT_FCNTEXP | HME_SEB_STAT_LCCNTEXP |\
    121 	 HME_SEB_STAT_ECNTEXP  | HME_SEB_STAT_NCNTEXP |                        \
    122 	 HME_SEB_STAT_TFIFO_UND| HME_SEB_STAT_STSTERR | HME_SEB_STAT_CVCNTEXP |\
    123 	 HME_SEB_STAT_RFIFOVF  | HME_SEB_STAT_LCNTEXP | HME_SEB_STAT_CCNTEXP  |\
    124 	 HME_SEB_STAT_ACNTEXP)
    125 
    126 /*
    127  * HME Transmitter register offsets
    128  */
    129 #define HME_ETXI_PENDING	(0*4)		/* Pending/wakeup */
    130 #define HME_ETXI_CFG		(1*4)
    131 #define HME_ETXI_RING		(2*4)		/* Descriptor Ring pointer */
    132 #define HME_ETXI_BBASE		(3*4)		/* Buffer base address (ro) */
    133 #define HME_ETXI_BDISP		(4*4)		/* Buffer displacement (ro) */
    134 #define HME_ETXI_FIFO_WPTR	(5*4)		/* FIFO write pointer */
    135 #define HME_ETXI_FIFO_SWPTR	(6*4)		/* FIFO shadow write pointer */
    136 #define HME_ETXI_FIFO_RPTR	(7*4)		/* FIFO read pointer */
    137 #define HME_ETXI_FIFO_SRPTR	(8*4)		/* FIFO shadow read pointer */
    138 #define HME_ETXI_FIFO_PKTCNT	(9*4)		/* FIFO packet counter */
    139 #define HME_ETXI_STATEMACHINE	(10*4)		/* State machine */
    140 #define HME_ETXI_RSIZE		(11*4)		/* Ring size */
    141 #define HME_ETXI_BPTR		(12*4)		/* Buffer pointer */
    142 
    143 
    144 /* TXI_PENDING bits */
    145 #define HME_ETX_TP_DMAWAKEUP	0x00000001	/* Start tx (rw, auto-clear) */
    146 
    147 /* TXI_CFG bits */
    148 #define HME_ETX_CFG_DMAENABLE	0x00000001	/* Enable TX DMA */
    149 #define HME_ETX_CFG_FIFOTHRESH	0x000003fe	/* TX fifo threshold */
    150 #define HME_ETX_CFG_IRQDAFTER	0x00000400	/* Intr after tx-fifo empty */
    151 #define HME_ETX_CFG_IRQDBEFORE	0x00000000	/* Intr before tx-fifo empty */
    152 
    153 
    154 /*
    155  * HME Receiver register offsets
    156  */
    157 #define HME_ERXI_CFG		(0*4)
    158 #define HME_ERXI_RING		(1*4)		/* Descriptor Ring pointer */
    159 #define HME_ERXI_BPTR		(2*4)		/* Data Buffer pointer (ro) */
    160 #define HME_ERXI_FIFO_WPTR	(3*4)		/* FIFO write pointer */
    161 #define HME_ERXI_FIFO_SWPTR	(4*4)		/* FIFO shadow write pointer */
    162 #define HME_ERXI_FIFO_RPTR	(5*4)		/* FIFO read pointer */
    163 #define HME_ERXI_FIFO_SRPTR	(6*4)		/* FIFO shadow read pointer */
    164 #define HME_ERXI_STATEMACHINE	(7*4)		/* State machine */
    165 
    166 /* ERXI_CFG bits */
    167 #define HME_ERX_CFG_DMAENABLE	0x00000001	/* Enable RX DMA */
    168 #define HME_ERX_CFG_BYTEOFFSET	0x00000038	/* RX first byte offset */
    169 #define HME_ERX_CFG_RINGSIZE32	0x00000000	/* Descriptor ring size: 32 */
    170 #define HME_ERX_CFG_RINGSIZE64	0x00000200	/* Descriptor ring size: 64 */
    171 #define HME_ERX_CFG_RINGSIZE128	0x00000400	/* Descriptor ring size: 128 */
    172 #define HME_ERX_CFG_RINGSIZE256	0x00000600	/* Descriptor ring size: 256 */
    173 #define HME_ERX_CFG_CSUMSTART	0x007f0000	/* cksum offset (half words) */
    174 #define	HME_ERX_CFG_CSUMSHIFT	16
    175 
    176 /*
    177  * HME MAC-core register offsets
    178  */
    179 #define HME_MACI_XIF		(0*4)
    180 #define HME_MACI_TXSWRST	(130*4)		/* TX reset */
    181 #define HME_MACI_TXCFG		(131*4)		/* TX config */
    182 #define HME_MACI_JSIZE		(139*4)		/* TX jam size */
    183 #define HME_MACI_TXSIZE		(140*4)		/* TX max size */
    184 #define HME_MACI_NCCNT		(144*4)		/* TX normal collision cnt */
    185 #define HME_MACI_FCCNT		(145*4)		/* TX first collision cnt */
    186 #define HME_MACI_EXCNT		(146*4)		/* TX excess collision cnt */
    187 #define HME_MACI_LTCNT		(147*4)		/* TX late collision cnt */
    188 #define HME_MACI_RANDSEED	(148*4)		/*  */
    189 #define HME_MACI_RXSWRST	(194*4)		/* RX reset */
    190 #define HME_MACI_RXCFG		(195*4)		/* RX config */
    191 #define HME_MACI_RXSIZE		(196*4)		/* RX max size */
    192 #define HME_MACI_MACADDR2	(198*4)		/* MAC address */
    193 #define HME_MACI_MACADDR1	(199*4)
    194 #define HME_MACI_MACADDR0	(200*4)
    195 #define HME_MACI_STAT_RCNT	(201*4)		/* RX frame count */
    196 #define HME_MACI_STAT_LCNT	(202*4)		/* Length error count */
    197 #define HME_MACI_STAT_ACNT	(203*4)		/* Align error count */
    198 #define HME_MACI_STAT_CCNT	(204*4)		/* FCS error count */
    199 #define HME_MACI_STATE		(205*4)		/* RX_MAC state machine */
    200 #define HME_MACI_STAT_CVCNT	(206*4)		/* Code violation count */
    201 #define HME_MACI_HASHTAB3	(208*4)		/* Address hash table */
    202 #define HME_MACI_HASHTAB2	(209*4)
    203 #define HME_MACI_HASHTAB1	(210*4)
    204 #define HME_MACI_HASHTAB0	(211*4)
    205 #define HME_MACI_AFILTER2	(212*4)		/* Address filter */
    206 #define HME_MACI_AFILTER1	(213*4)
    207 #define HME_MACI_AFILTER0	(214*4)
    208 #define HME_MACI_AFILTER_MASK	(215*4)
    209 
    210 /* XIF config register. */
    211 #define HME_MAC_XIF_OE		0x00000001	/* Output driver enable */
    212 #define HME_MAC_XIF_XLBACK	0x00000002	/* Loopback-mode XIF enable */
    213 #define HME_MAC_XIF_MLBACK	0x00000004	/* Loopback-mode MII enable */
    214 #define HME_MAC_XIF_MIIENABLE	0x00000008	/* MII receive buffer enable */
    215 #define HME_MAC_XIF_SQENABLE	0x00000010	/* SQE test enable */
    216 #define HME_MAC_XIF_SQETWIN	0x000003e0	/* SQE time window */
    217 #define HME_MAC_XIF_LANCE	0x00000010	/* Lance mode enable */
    218 #define HME_MAC_XIF_LIPG0	0x000003e0	/* Lance mode IPG0 */
    219 #define HME_MAC_XIF_BITS	"\177\020"				\
    220 				"b\0OE\0b\1XLBACK\0b\2MLBACK\0"		\
    221 				"b\4MIIENA\0b\4SQEENA\0\0"
    222 
    223 /* Transmit config register. */
    224 #define HME_MAC_TXCFG_ENABLE	0x00000001	/* Enable the transmitter */
    225 #define HME_MAC_TXCFG_SMODE	0x00000020	/* Enable slow transmit mode */
    226 #define HME_MAC_TXCFG_CIGN	0x00000040	/* Ignore transmit collisions */
    227 #define HME_MAC_TXCFG_FCSOFF	0x00000080	/* Do not emit FCS */
    228 #define HME_MAC_TXCFG_DBACKOFF	0x00000100	/* Disable backoff */
    229 #define HME_MAC_TXCFG_FULLDPLX	0x00000200	/* Enable full-duplex */
    230 #define HME_MAC_TXCFG_DGIVEUP	0x00000400	/* Don't give up on transmits */
    231 #define HME_MAC_TXCFG_BITS	"\177\020"				\
    232 				"b\0ENA\0b\6SMODE\0b\7IGNCOLL\0"	\
    233 				"b\x8_FCSOFF\0b\x9_DBACKOFF\0"		\
    234 				"b\xa_FULLDPLX\0b\xc_DGIVEUP\0\0"
    235 
    236 /* Receive config register. */
    237 #define HME_MAC_RXCFG_ENABLE	0x00000001 /* Enable the receiver */
    238 #define HME_MAC_RXCFG_PSTRIP	0x00000020 /* Pad byte strip enable */
    239 #define HME_MAC_RXCFG_PMISC	0x00000040 /* Enable promiscuous mode */
    240 #define HME_MAC_RXCFG_DERR	0x00000080 /* Disable error checking */
    241 #define HME_MAC_RXCFG_DCRCS	0x00000100 /* Disable CRC stripping */
    242 #define HME_MAC_RXCFG_ME	0x00000200 /* Receive packets addressed to me */
    243 #define HME_MAC_RXCFG_PGRP	0x00000400 /* Enable promisc group mode */
    244 #define HME_MAC_RXCFG_HENABLE	0x00000800 /* Enable the hash filter */
    245 #define HME_MAC_RXCFG_AENABLE	0x00001000 /* Enable the address filter */
    246 #define HME_MAC_RXCFG_BITS	"\177\020"				\
    247 				"b\0ENA\0b\6PSTRIP\0b\7PMISC\0"		\
    248 				"b\x8ERRDIS\0b\x9CRCDIS\0b\xaME\0"	\
    249 				"b\xbPGRP\0b\xcHASHENA\0\xd_ADDRENA\0\0"
    250 
    251 /*
    252  * HME MIF register offsets
    253  */
    254 #define HME_MIFI_BB_CLK		(0*4)	/* bit-bang clock */
    255 #define HME_MIFI_BB_DATA	(1*4)	/* bit-bang data */
    256 #define HME_MIFI_BB_OE		(2*4)	/* bit-bang output enable */
    257 #define HME_MIFI_FO		(3*4)	/* frame output */
    258 #define HME_MIFI_CFG		(4*4)	/*  */
    259 #define HME_MIFI_IMASK		(5*4)	/* Interrupt mask for status change */
    260 #define HME_MIFI_STAT		(6*4)	/* Status (ro, auto-clear) */
    261 #define HME_MIFI_SM		(7*4)	/* State machine (ro) */
    262 
    263 /* MIF Configuration register */
    264 #define HME_MIF_CFG_PHY		0x00000001	/* PHY select */
    265 #define HME_MIF_CFG_PE		0x00000002	/* Poll enable */
    266 #define HME_MIF_CFG_BBMODE	0x00000004	/* Bit-bang mode */
    267 #define HME_MIF_CFG_PRADDR	0x000000f8	/* Poll register address */
    268 #define HME_MIF_CFG_MDI0	0x00000100	/* MDI_0 (ro) */
    269 #define HME_MIF_CFG_MDI1	0x00000200	/* MDI_1 (ro) */
    270 #define HME_MIF_CFG_PPADDR	0x00007c00	/* Poll phy address */
    271 #define HME_MIF_CFG_BITS	"\177\020"				\
    272 				"b\0PHYEXT\0b\1POLLENA\0b\3BBMODE\0"	\
    273 				"b\x8MDI0\0b\x9MDI1\0\0"
    274 
    275 /* MIF Frame/Output register */
    276 #define HME_MIF_FO_ST		0xc0000000	/* Start of frame */
    277 #define HME_MIF_FO_ST_SHIFT	30		/* */
    278 #define HME_MIF_FO_OPC		0x30000000	/* Opcode */
    279 #define HME_MIF_FO_OPC_SHIFT	28		/* */
    280 #define HME_MIF_FO_PHYAD	0x0f800000	/* PHY Address */
    281 #define HME_MIF_FO_PHYAD_SHIFT	23		/* */
    282 #define HME_MIF_FO_REGAD	0x007c0000	/* Register Address */
    283 #define HME_MIF_FO_REGAD_SHIFT	18		/* */
    284 #define HME_MIF_FO_TAMSB	0x00020000	/* Turn-around MSB */
    285 #define HME_MIF_FO_TALSB	0x00010000	/* Turn-around LSB */
    286 #define HME_MIF_FO_DATA		0x0000ffff	/* data to read or write */
    287 
    288 /* Wired HME PHY addresses */
    289 #define	HME_PHYAD_INTERNAL	1
    290 #define	HME_PHYAD_EXTERNAL	0
    291 
    292 /*
    293  * Buffer Descriptors.
    294  */
    295 #ifdef notdef
    296 struct hme_xd {
    297 	volatile uint32_t	xd_flags;
    298 	volatile uint32_t	xd_addr;	/* Buffer address (DMA) */
    299 };
    300 #endif
    301 #define HME_XD_SIZE			8
    302 #define HME_XD_FLAGS(b, i)		((char *)(b) + ((i) * HME_XD_SIZE) + 0)
    303 #define HME_XD_ADDR(b, i)		((char *)(b) + ((i) * HME_XD_SIZE) + 4)
    304 #define HME_XD_GETFLAGS(p, b, i)					\
    305 	(p) ? le32toh(*((uint32_t *)HME_XD_FLAGS(b,i))) :		\
    306 		(*((uint32_t *)HME_XD_FLAGS(b,i)))
    307 #define HME_XD_SETFLAGS(p, b, i, f)	do {				\
    308 	*((uint32_t *)HME_XD_FLAGS(b,i)) = ((p) ? htole32((f)) : (f));	\
    309 } while(/* CONSTCOND */ 0)
    310 #define HME_XD_SETADDR(p, b, i, a)	do {				\
    311 	*((uint32_t *)HME_XD_ADDR(b,i)) = ((p) ? htole32((a)) : (a));	\
    312 } while(/* CONSTCOND */ 0)
    313 
    314 /* Descriptor control word flag values */
    315 #define HME_XD_OWN	0x80000000	/* ownership: 1=hw, 0=sw */
    316 #define HME_XD_SOP	0x40000000	/* start of packet marker (tx) */
    317 #define HME_XD_OFL	0x40000000	/* buffer overflow (rx) */
    318 #define HME_XD_EOP	0x20000000	/* end of packet marker (tx) */
    319 #define	HME_XD_TXCKSUM	0x10000000	/* checksum enable (tx) */
    320 #define	HME_XD_TXCSSTUFF 0xff00000	/* checksum stuff offset (tx) */
    321 #define	HME_XD_TXCSSTUFFSHIFT  20
    322 #define	HME_XD_TXCSSTART 0x000fc000	/* checksum start offset (tx) */
    323 #define	HME_XD_TXCSSTARTSHIFT  14
    324 #define	HME_XD_TXLENMSK	0x00003fff	/* packet length mask (tx) */
    325 
    326 #define HME_XD_RXLENMSK	0x3fff0000	/* packet length mask (rx) */
    327 #define HME_XD_RXLENSHIFT	16
    328 #define HME_XD_RXCKSUM	0x0000ffff	/* packet checksum (rx), complement */
    329 
    330 /* Macros to encode/decode the receive buffer size from the flags field */
    331 #define HME_XD_ENCODE_RSIZE(sz)		\
    332 	(((sz) << HME_XD_RXLENSHIFT) & HME_XD_RXLENMSK)
    333 #define HME_XD_DECODE_RSIZE(flags)	\
    334 	(((flags) & HME_XD_RXLENMSK) >> HME_XD_RXLENSHIFT)
    335 
    336 /* Provide encode/decode macros for the transmit buffers for symmetry */
    337 #define HME_XD_ENCODE_TSIZE(sz)		\
    338 	(((sz) << 0) & HME_XD_TXLENMSK)
    339 #define HME_XD_DECODE_TSIZE(flags)	\
    340 	(((flags) & HME_XD_TXLENMSK) >> 0)
    341 
    342