diff --git a/drivers/net/mace.h b/drivers/net/mace.h
new file mode 100644
index 0000000..30b7ec0
--- /dev/null
+++ b/drivers/net/mace.h
@@ -0,0 +1,173 @@
+/*
+ * mace.h - definitions for the registers in the Am79C940 MACE
+ * (Medium Access Control for Ethernet) controller.
+ *
+ * Copyright (C) 1996 Paul Mackerras.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#define REG(x)	volatile unsigned char x; char x ## _pad[15]
+
+struct mace {
+	REG(rcvfifo);		/* receive FIFO */
+	REG(xmtfifo);		/* transmit FIFO */
+	REG(xmtfc);		/* transmit frame control */
+	REG(xmtfs);		/* transmit frame status */
+	REG(xmtrc);		/* transmit retry count */
+	REG(rcvfc);		/* receive frame control */
+	REG(rcvfs);		/* receive frame status (4 bytes) */
+	REG(fifofc);		/* FIFO frame count */
+	REG(ir);		/* interrupt register */
+	REG(imr);		/* interrupt mask register */
+	REG(pr);		/* poll register */
+	REG(biucc);		/* bus interface unit config control */
+	REG(fifocc);		/* FIFO configuration control */
+	REG(maccc);		/* medium access control config control */
+	REG(plscc);		/* phys layer signalling config control */
+	REG(phycc);		/* physical configuration control */
+	REG(chipid_lo);		/* chip ID, lsb */
+	REG(chipid_hi);		/* chip ID, msb */
+	REG(iac);		/* internal address config */
+	REG(reg19);
+	REG(ladrf);		/* logical address filter (8 bytes) */
+	REG(padr);		/* physical address (6 bytes) */
+	REG(reg22);
+	REG(reg23);
+	REG(mpc);		/* missed packet count (clears when read) */
+	REG(reg25);
+	REG(rntpc);		/* runt packet count (clears when read) */
+	REG(rcvcc);		/* recv collision count (clears when read) */
+	REG(reg28);
+	REG(utr);		/* user test reg */
+	REG(reg30);
+	REG(reg31);
+};
+
+/* Bits in XMTFC */
+#define DRTRY		0x80	/* don't retry transmission after collision */
+#define DXMTFCS		0x08	/* don't append FCS to transmitted frame */
+#define AUTO_PAD_XMIT	0x01	/* auto-pad short packets on transmission */
+
+/* Bits in XMTFS: only valid when XMTSV is set in PR and XMTFS */
+#define XMTSV		0x80	/* transmit status (i.e. XMTFS) valid */
+#define UFLO		0x40	/* underflow - xmit fifo ran dry */
+#define LCOL		0x20	/* late collision (transmission aborted) */
+#define MORE		0x10	/* 2 or more retries needed to xmit frame */
+#define ONE		0x08	/* 1 retry needed to xmit frame */
+#define DEFER		0x04	/* MACE had to defer xmission (enet busy) */
+#define LCAR		0x02	/* loss of carrier (transmission aborted) */
+#define RTRY		0x01	/* too many retries (transmission aborted) */
+
+/* Bits in XMTRC: only valid when XMTSV is set in PR (and XMTFS) */
+#define EXDEF		0x80	/* had to defer for excessive time */
+#define RETRY_MASK	0x0f	/* number of retries (0 - 15) */
+
+/* Bits in RCVFC */
+#define LLRCV		0x08	/* low latency receive: early DMA request */
+#define M_RBAR		0x04	/* sets function of EAM/R pin */
+#define AUTO_STRIP_RCV	0x01	/* auto-strip short LLC frames on recv */
+
+/*
+ * Bits in RCVFS.  After a frame is received, four bytes of status
+ * are automatically read from this register and appended to the frame
+ * data in memory.  These are:
+ * Byte 0 and 1: message byte count and frame status
+ * Byte 2: runt packet count
+ * Byte 3: receive collision count
+ */
+#define RS_OFLO		0x8000	/* receive FIFO overflowed */
+#define RS_CLSN		0x4000	/* received frame suffered (late) collision */
+#define RS_FRAMERR	0x2000	/* framing error flag */
+#define RS_FCSERR	0x1000	/* frame had FCS error */
+#define RS_COUNT	0x0fff	/* mask for byte count field */
+
+/* Bits (fields) in FIFOFC */
+#define RCVFC_SH	4	/* receive frame count in FIFO */
+#define RCVFC_MASK	0x0f
+#define XMTFC_SH	0	/* transmit frame count in FIFO */
+#define XMTFC_MASK	0x0f
+
+/*
+ * Bits in IR and IMR.  The IR clears itself when read.
+ * Setting a bit in the IMR will disable the corresponding interrupt.
+ */
+#define JABBER		0x80	/* jabber error - 10baseT xmission too long */
+#define BABBLE		0x40	/* babble - xmitter xmitting for too long */
+#define CERR		0x20	/* collision err - no SQE test (heartbeat) */
+#define RCVCCO		0x10	/* RCVCC overflow */
+#define RNTPCO		0x08	/* RNTPC overflow */
+#define MPCO		0x04	/* MPC overflow */
+#define RCVINT		0x02	/* receive interrupt */
+#define XMTINT		0x01	/* transmitter interrupt */
+
+/* Bits in PR */
+#define XMTSV		0x80	/* XMTFS valid (same as in XMTFS) */
+#define TDTREQ		0x40	/* set when xmit fifo is requesting data */
+#define RDTREQ		0x20	/* set when recv fifo requests data xfer */
+
+/* Bits in BIUCC */
+#define BSWP		0x40	/* byte swap, i.e. big-endian bus */
+#define XMTSP_4		0x00	/* start xmitting when 4 bytes in FIFO */
+#define XMTSP_16	0x10	/* start xmitting when 16 bytes in FIFO */
+#define XMTSP_64	0x20	/* start xmitting when 64 bytes in FIFO */
+#define XMTSP_112	0x30	/* start xmitting when 112 bytes in FIFO */
+#define SWRST		0x01	/* software reset */
+
+/* Bits in FIFOCC */
+#define XMTFW_8		0x00	/* xmit fifo watermark = 8 words free */
+#define XMTFW_16	0x40	/*  16 words free */
+#define XMTFW_32	0x80	/*  32 words free */
+#define RCVFW_16	0x00	/* recv fifo watermark = 16 bytes avail */
+#define RCVFW_32	0x10	/*  32 bytes avail */
+#define RCVFW_64	0x20	/*  64 bytes avail */
+#define XMTFWU		0x08	/* xmit fifo watermark update enable */
+#define RCVFWU		0x04	/* recv fifo watermark update enable */
+#define XMTBRST		0x02	/* enable transmit burst mode */
+#define RCVBRST		0x01	/* enable receive burst mode */
+
+/* Bits in MACCC */
+#define PROM		0x80	/* promiscuous mode */
+#define DXMT2PD		0x40	/* disable xmit two-part deferral algorithm */
+#define EMBA		0x20	/* enable modified backoff algorithm */
+#define DRCVPA		0x08	/* disable receiving physical address */
+#define DRCVBC		0x04	/* disable receiving broadcasts */
+#define ENXMT		0x02	/* enable transmitter */
+#define ENRCV		0x01	/* enable receiver */
+
+/* Bits in PLSCC */
+#define XMTSEL		0x08	/* select DO+/DO- state when idle */
+#define PORTSEL_AUI	0x00	/* select AUI port */
+#define PORTSEL_10T	0x02	/* select 10Base-T port */
+#define PORTSEL_DAI	0x04	/* select DAI port */
+#define PORTSEL_GPSI	0x06	/* select GPSI port */
+#define ENPLSIO		0x01	/* enable optional PLS I/O pins */
+
+/* Bits in PHYCC */
+#define LNKFL		0x80	/* reports 10Base-T link failure */
+#define DLNKTST		0x40	/* disable 10Base-T link test */
+#define REVPOL		0x20	/* 10Base-T receiver polarity reversed */
+#define DAPC		0x10	/* disable auto receiver polarity correction */
+#define LRT		0x08	/* low receive threshold for long links */
+#define ASEL		0x04	/* auto-select AUI or 10Base-T port */
+#define RWAKE		0x02	/* remote wake function */
+#define AWAKE		0x01	/* auto wake function */
+
+/* Bits in IAC */
+#define ADDRCHG		0x80	/* request address change */
+#define PHYADDR		0x04	/* access physical address */
+#define LOGADDR		0x02	/* access multicast filter */
+
+/* Bits in UTR */
+#define RTRE		0x80	/* reserved test register enable. DON'T SET. */
+#define RTRD		0x40	/* reserved test register disable.  Sticky */
+#define RPAC		0x20	/* accept runt packets */
+#define FCOLL		0x10	/* force collision */
+#define RCVFCSE		0x08	/* receive FCS enable */
+#define LOOP_NONE	0x00	/* no loopback */
+#define LOOP_EXT	0x02	/* external loopback */
+#define LOOP_INT	0x04	/* internal loopback, excludes MENDEC */
+#define LOOP_MENDEC	0x06	/* internal loopback, includes MENDEC */