/*
* RTEMS driver for M68360 SCC1 Ethernet
*
* W. Eric Norum
* Saskatchewan Accelerator Laboratory
* University of Saskatchewan
* Saskatoon, Saskatchewan, CANADA
* eric@skatter.usask.ca
*
* $Id$
*/
#include <bsp.h>
#include <m68360.h>
#include <stdio.h>
#include <rtems/error.h>
#include <rtems/rtems_bsdnet.h>
#include <sys/param.h>
#include <sys/mbuf.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
/*
* Number of SCCs supported by this driver
*/
#define NSCCDRIVER 1
/*
* Default number of buffer descriptors set aside for this driver.
* The number of transmit buffer descriptors has to be quite large
* since a single frame often uses four or more buffer descriptors.
*/
#define RX_BUF_COUNT 15
#define TX_BUF_COUNT 4
#define TX_BD_PER_BUF 4
/*
* RTEMS event used by interrupt handler to signal driver tasks.
* This must not be any of the events used by the network task synchronization.
*/
#define INTERRUPT_EVENT RTEMS_EVENT_1
/*
* RTEMS event used to start transmit daemon.
* This must not be the same as INTERRUPT_EVENT.
*/
#define START_TRANSMIT_EVENT RTEMS_EVENT_2
/*
* Receive buffer size -- Allow for a full ethernet packet including CRC
*/
#define RBUF_SIZE 1520
#if (MCLBYTES < RBUF_SIZE)
# error "Driver must have MCLBYTES > RBUF_SIZE"
#endif
/*
* Per-device data
*/
struct scc_softc {
struct arpcom arpcom;
struct mbuf **rxMbuf;
struct mbuf **txMbuf;
int acceptBroadcast;
int rxBdCount;
int txBdCount;
int txBdHead;
int txBdTail;
int txBdActiveCount;
m360BufferDescriptor_t *rxBdBase;
m360BufferDescriptor_t *txBdBase;
rtems_id rxDaemonTid;
rtems_id txDaemonTid;
/*
* Statistics
*/
unsigned long rxInterrupts;
unsigned long rxNotFirst;
unsigned long rxNotLast;
unsigned long rxGiant;
unsigned long rxNonOctet;
unsigned long rxRunt;
unsigned long rxBadCRC;
unsigned long rxOverrun;
unsigned long rxCollision;
unsigned long txInterrupts;
unsigned long txDeferred;
unsigned long txHeartbeat;
unsigned long txLateCollision;
unsigned long txRetryLimit;
unsigned long txUnderrun;
unsigned long txLostCarrier;
unsigned long txRawWait;
};
static struct scc_softc scc_softc[NSCCDRIVER];
/*
* SCC1 interrupt handler
*/
static rtems_isr
m360Enet_interrupt_handler (rtems_vector_number v)
{
/*
* Frame received?
*/
if ((m360.scc1.sccm & 0x8) && (m360.scc1.scce & 0x8)) {
m360.scc1.scce = 0x8;
m360.scc1.sccm &= ~0x8;
scc_softc[0].rxInterrupts++;
rtems_event_send (scc_softc[0].rxDaemonTid, INTERRUPT_EVENT);
}
/*
* Buffer transmitted or transmitter error?
*/
if ((m360.scc1.sccm & 0x12) && (m360.scc1.scce & 0x12)) {
m360.scc1.scce = 0x12;
m360.scc1.sccm &= ~0x12;
scc_softc[0].txInterrupts++;
rtems_event_send (scc_softc[0].txDaemonTid, INTERRUPT_EVENT);
}
m360.cisr = 1UL << 30; /* Clear SCC1 interrupt-in-service bit */
}
/*
* Initialize the ethernet hardware
*/
static void
m360Enet_initialize_hardware (struct scc_softc *sc)
{
int i;
unsigned char *hwaddr;
rtems_status_code status;
rtems_isr_entry old_handler;
/*
* Configure port A CLK1, CLK2, TXD1 and RXD1 pins
*/
m360.papar |= 0x303;
m360.padir &= ~0x303;
m360.paodr &= ~0x303;
/*
* Configure port C CTS1* and CD1* pins
*/
m360.pcpar &= ~0x30;
m360.pcdir &= ~0x30;
m360.pcso |= 0x30;
/*
* Connect CLK1 and CLK2 to SCC1
*/
m360.sicr &= ~0xFF;
m360.sicr |= (5 << 3) | 4;
/*
* Allocate mbuf pointers
*/
sc->rxMbuf = malloc (sc->rxBdCount * sizeof *sc->rxMbuf, M_MBUF, M_NOWAIT);
sc->txMbuf = malloc (sc->txBdCount * sizeof *sc->txMbuf, M_MBUF, M_NOWAIT);
if (!sc->rxMbuf || !sc->txMbuf)
rtems_panic ("No memory for mbuf pointers");
/*
* Set receiver and transmitter buffer descriptor bases
*/
sc->rxBdBase = M360AllocateBufferDescriptors(sc->rxBdCount);
sc->txBdBase = M360AllocateBufferDescriptors(sc->txBdCount);
m360.scc1p.rbase = (char *)sc->rxBdBase - (char *)&m360;
m360.scc1p.tbase = (char *)sc->txBdBase - (char *)&m360;
/*
* Send "Init parameters" command
*/
M360ExecuteRISC (M360_CR_OP_INIT_RX_TX | M360_CR_CHAN_SCC1);
/*
* Set receive and transmit function codes
*/
m360.scc1p.rfcr = M360_RFCR_MOT | M360_RFCR_DMA_SPACE;
m360.scc1p.tfcr = M360_TFCR_MOT | M360_TFCR_DMA_SPACE;
/*
* Set maximum receive buffer length
*/
m360.scc1p.mrblr = RBUF_SIZE;
/*
* Set CRC parameters
*/
m360.scc1p.un.ethernet.c_pres = 0xFFFFFFFF;
m360.scc1p.un.ethernet.c_mask = 0xDEBB20E3;
/*
* Clear diagnostic counters
*/
m360.scc1p.un.ethernet.crcec = 0;
m360.scc1p.un.ethernet.alec = 0;
m360.scc1p.un.ethernet.disfc = 0;
/*
* Set pad value
*/
m360.scc1p.un.ethernet.pads = 0x8888;
/*
* Set retry limit
*/
m360.scc1p.un.ethernet.ret_lim = 15;
/*
* Set maximum and minimum frame length
*/
m360.scc1p.un.ethernet.mflr = 1518;
m360.scc1p.un.ethernet.minflr = 64;
m360.scc1p.un.ethernet.maxd1 = RBUF_SIZE;
m360.scc1p.un.ethernet.maxd2 = RBUF_SIZE;
/*
* Clear group address hash table
*/
m360.scc1p.un.ethernet.gaddr1 = 0;
m360.scc1p.un.ethernet.gaddr2 = 0;
m360.scc1p.un.ethernet.gaddr3 = 0;
m360.scc1p.un.ethernet.gaddr4 = 0;
/*
* Set our physical address
*/
hwaddr = sc->arpcom.ac_enaddr;
m360.scc1p.un.ethernet.paddr_h = (hwaddr[5] << 8) | hwaddr[4];
m360.scc1p.un.ethernet.paddr_m = (hwaddr[3] << 8) | hwaddr[2];
m360.scc1p.un.ethernet.paddr_l = (hwaddr[1] << 8) | hwaddr[0];
/*
* Aggressive retry
*/
m360.scc1p.un.ethernet.p_per = 0;
/*
* Clear individual address hash table
*/
m360.scc1p.un.ethernet.iaddr1 = 0;
m360.scc1p.un.ethernet.iaddr2 = 0;
m360.scc1p.un.ethernet.iaddr3 = 0;
m360.scc1p.un.ethernet.iaddr4 = 0;
/*
* Set up receive buffer descriptors
*/
for (i = 0 ; i < sc->rxBdCount ; i++)
(sc->rxBdBase + i)->status = 0;
/*
* Set up transmit buffer descriptors
*/
for (i = 0 ; i < sc->txBdCount ; i++) {
(sc->txBdBase + i)->status = 0;
sc->txMbuf[i] = NULL;
}
sc->txBdHead = sc->txBdTail = 0;
sc->txBdActiveCount = 0;
/*
* Clear any outstanding events
*/
m360.scc1.scce = 0xFFFF;
/*
* Set up interrupts
*/
status = rtems_interrupt_catch (m360Enet_interrupt_handler,
(m360.cicr & 0xE0) | 0x1E,
&old_handler);
if (status != RTEMS_SUCCESSFUL)
rtems_panic ("Can't attach M360 SCC1 interrupt handler: %s\n",
rtems_status_text (status));
m360.scc1.sccm = 0; /* No interrupts unmasked till necessary */
m360.cimr |= (1UL << 30); /* Enable SCC1 interrupt */
/*
* Set up General SCC Mode Register
* Ethernet configuration
*/
m360.scc1.gsmr_h = 0x0;
m360.scc1.gsmr_l = 0x1088000c;
/*
* Set up data synchronization register
* Ethernet synchronization pattern
*/
m360.scc1.dsr = 0xd555;
/*
* Set up protocol-specific mode register
* Heartbeat check
* No force collision
* Discard short frames
* Individual address mode
* Ethernet CRC
* Not promisuous
* Ignore/accept broadcast packets as specified
* Normal backoff timer
* No loopback
* No input sample at end of frame
* 64-byte limit for late collision
* Wait 22 bits before looking for start of frame delimiter
* Disable full-duplex operation
*/
m360.scc1.psmr = 0x880A | (sc->acceptBroadcast ? 0 : 0x100);
/*
* Enable the TENA (RTS1*) pin
*/
#if (defined (M68360_ATLAS_HSB))
m360.pbpar |= 0x1000;
m360.pbdir |= 0x1000;
#else
m360.pcpar |= 0x1;
m360.pcdir &= ~0x1;
#endif
}
/*
* Soak up buffer descriptors that have been sent
* Note that a buffer descriptor can't be retired as soon as it becomes
* ready. The MC68360 Errata (May 96) says that, "If an Ethernet frame is
* made up of multiple buffers, the user should not reuse the first buffer
* descriptor until the last buffer descriptor of the frame has had its
* ready bit cleared by the CPM".
*/
static void
m360Enet_retire_tx_bd (struct scc_softc *sc)
{
rtems_unsigned16 status;
int i;
int nRetired;
struct mbuf *m, *n;
i = sc->txBdTail;
nRetired = 0;
while ((sc->txBdActiveCount != 0)
&& (((status = (sc->txBdBase + i)->status) & M360_BD_READY) == 0)) {
/*
* See if anything went wrong
*/
if (status & (M360_BD_DEFER |
M360_BD_HEARTBEAT |
M360_BD_LATE_COLLISION |
M360_BD_RETRY_LIMIT |
M360_BD_UNDERRUN |
M360_BD_CARRIER_LOST)) {
/*
* Check for errors which stop the transmitter.
*/
if (status & (M360_BD_LATE_COLLISION |
M360_BD_RETRY_LIMIT |
M360_BD_UNDERRUN)) {
if (status & M360_BD_LATE_COLLISION)
scc_softc[0].txLateCollision++;
if (status & M360_BD_RETRY_LIMIT)
scc_softc[0].txRetryLimit++;
if (status & M360_BD_UNDERRUN)
scc_softc[0].txUnderrun++;
/*
* Restart the transmitter
*/
M360ExecuteRISC (M360_CR_OP_RESTART_TX | M360_CR_CHAN_SCC1);
}
if (status & M360_BD_DEFER)
scc_softc[0].txDeferred++;
if (status & M360_BD_HEARTBEAT)
scc_softc[0].txHeartbeat++;
if (status & M360_BD_CARRIER_LOST)
scc_softc[0].txLostCarrier++;
}
nRetired++;
if (status & M360_BD_LAST) {
/*
* A full frame has been transmitted.
* Free all the associated buffer descriptors.
*/
sc->txBdActiveCount -= nRetired;
while (nRetired) {
nRetired--;
m = sc->txMbuf[sc->txBdTail];
MFREE (m, n);
if (++sc->txBdTail == sc->txBdCount)
sc->txBdTail = 0;
}
}
if (++i == sc->txBdCount)
i = 0;
}
}
/*
* SCC reader task
*/
static void
scc_rxDaemon (void *arg)
{
struct scc_softc *sc = (struct scc_softc *)arg;
struct ifnet *ifp = &sc->arpcom.ac_if;
struct mbuf *m;
rtems_unsigned16 status;
m360BufferDescriptor_t *rxBd;
int rxBdIndex;
/*
* Allocate space for incoming packets and start reception
*/
for (rxBdIndex = 0 ; ;) {
rxBd = sc->rxBdBase + rxBdIndex;
MGETHDR (m, M_WAIT, MT_DATA);
MCLGET (m, M_WAIT);
m->m_pkthdr.rcvif = ifp;
sc->rxMbuf[rxBdIndex] = m;
rxBd->buffer = mtod (m, void *);
rxBd->status = M360_BD_EMPTY | M360_BD_INTERRUPT;
if (++rxBdIndex == sc->rxBdCount) {
rxBd->status |= M360_BD_WRAP;
break;
}
}
/*
* Input packet handling loop
*/
rxBdIndex = 0;
for (;;) {
rxBd = sc->rxBdBase + rxBdIndex;
/*
* Wait for packet if there's not one ready
*/
if ((status = rxBd->status) & M360_BD_EMPTY) {
/*
* Clear old events
*/
m360.scc1.scce = 0x8;
/*
* Wait for packet
* Note that the buffer descriptor is checked
* *before* the event wait -- this catches the
* possibility that a packet arrived between the
* `if' above, and the clearing of the event register.
*/
while ((status = rxBd->status) & M360_BD_EMPTY) {
rtems_event_set events;
/*
* Unmask RXF (Full frame received) event
*/
m360.scc1.sccm |= 0x8;
rtems_bsdnet_event_receive (INTERRUPT_EVENT,
RTEMS_WAIT|RTEMS_EVENT_ANY,
RTEMS_NO_TIMEOUT,
&events);
}
}
/*
* Check that packet is valid
*/
if ((status & (M360_BD_LAST |
M360_BD_FIRST_IN_FRAME |
M360_BD_LONG |
M360_BD_NONALIGNED |
M360_BD_SHORT |
M360_BD_CRC_ERROR |
M360_BD_OVERRUN |
M360_BD_COLLISION)) ==
(M360_BD_LAST |
M360_BD_FIRST_IN_FRAME)) {
/*
* Pass the packet up the chain.
* FIXME: Packet filtering hook could be done here.
*/
struct ether_header *eh;
m = sc->rxMbuf[rxBdIndex];
m->m_len = m->m_pkthdr.len = rxBd->length -
sizeof(rtems_unsigned32) -
sizeof(struct ether_header);
eh = mtod (m, struct ether_header *);
m->m_data += sizeof(struct ether_header);
ether_input (ifp, eh, m);
/*
* Allocate a new mbuf
*/
MGETHDR (m, M_WAIT, MT_DATA);
MCLGET (m, M_WAIT);
m->m_pkthdr.rcvif = ifp;
sc->rxMbuf[rxBdIndex] = m;
rxBd->buffer = mtod (m, void *);
}
else {
/*
* Something went wrong with the reception
*/
if (!(status & M360_BD_LAST))
sc->rxNotLast++;
if (!(status & M360_BD_FIRST_IN_FRAME))
sc->rxNotFirst++;
if (status & M360_BD_LONG)
sc->rxGiant++;
if (status & M360_BD_NONALIGNED)
sc->rxNonOctet++;
if (status & M360_BD_SHORT)
sc->rxRunt++;
if (status & M360_BD_CRC_ERROR)
sc->rxBadCRC++;
if (status & M360_BD_OVERRUN)
sc->rxOverrun++;
if (status & M360_BD_COLLISION)
sc->rxCollision++;
}
/*
* Reenable the buffer descriptor
*/
rxBd->status = (status & (M360_BD_WRAP | M360_BD_INTERRUPT)) | M360_BD_EMPTY;
/*
* Move to next buffer descriptor
*/
if (++rxBdIndex == sc->rxBdCount)
rxBdIndex = 0;
}
}
static void
sendpacket (struct ifnet *ifp, struct mbuf *m)
{
struct scc_softc *sc = ifp->if_softc;
volatile m360BufferDescriptor_t *firstTxBd, *txBd;
struct mbuf *l = NULL;
rtems_unsigned16 status;
int nAdded;
/*
* Free up buffer descriptors
*/
m360Enet_retire_tx_bd (sc);
/*
* Set up the transmit buffer descriptors.
* No need to pad out short packets since the
* hardware takes care of that automatically.
* No need to copy the packet to a contiguous buffer
* since the hardware is capable of scatter/gather DMA.
*/
nAdded = 0;
txBd = firstTxBd = sc->txBdBase + sc->txBdHead;
for (;;) {
/*
* Wait for buffer descriptor to become available.
*/
if ((sc->txBdActiveCount + nAdded) == sc->txBdCount) {
/*
* Clear old events
*/
m360.scc1.scce = 0x12;
/*
* Wait for buffer descriptor to become available.
* Note that the buffer descriptors are checked
* *before* * entering the wait loop -- this catches
* the possibility that a buffer descriptor became
* available between the `if' above, and the clearing
* of the event register.
* This is to catch the case where the transmitter
* stops in the middle of a frame -- and only the
* last buffer descriptor in a frame can generate
* an interrupt.
*/
m360Enet_retire_tx_bd (sc);
while ((sc->txBdActiveCount + nAdded) == sc->txBdCount) {
rtems_event_set events;
/*
* Unmask TXB (buffer transmitted) and
* TXE (transmitter error) events.
*/
m360.scc1.sccm |= 0x12;
rtems_bsdnet_event_receive (INTERRUPT_EVENT,
RTEMS_WAIT|RTEMS_EVENT_ANY,
RTEMS_NO_TIMEOUT,
&events);
m360Enet_retire_tx_bd (sc);
}
}
/*
* Don't set the READY flag till the
* whole packet has been readied.
*/
status = nAdded ? M360_BD_READY : 0;
/*
* FIXME: Why not deal with empty mbufs at at higher level?
* The IP fragmentation routine in ip_output
* can produce packet fragments with zero length.
* I think that ip_output should be changed to get
* rid of these zero-length mbufs, but for now,
* I'll deal with them here.
*/
if (m->m_len) {
/*
* Fill in the buffer descriptor
*/
txBd->buffer = mtod (m, void *);
txBd->length = m->m_len;
sc->txMbuf[sc->txBdHead] = m;
nAdded++;
if (++sc->txBdHead == sc->txBdCount) {
status |= M360_BD_WRAP;
sc->txBdHead = 0;
}
l = m;
m = m->m_next;
}
else {
/*
* Just toss empty mbufs
*/
struct mbuf *n;
MFREE (m, n);
m = n;
if (l != NULL)
l->m_next = m;
}
/*
* Set the transmit buffer status.
* Break out of the loop if this mbuf is the last in the frame.
*/
if (m == NULL) {
if (nAdded) {
status |= M360_BD_PAD | M360_BD_LAST | M360_BD_TX_CRC | M360_BD_INTERRUPT;
txBd->status = status;
firstTxBd->status |= M360_BD_READY;
sc->txBdActiveCount += nAdded;
}
break;
}
txBd->status = status;
txBd = sc->txBdBase + sc->txBdHead;
}
}
/*
* Driver transmit daemon
*/
void
scc_txDaemon (void *arg)
{
struct scc_softc *sc = (struct scc_softc *)arg;
struct ifnet *ifp = &sc->arpcom.ac_if;
struct mbuf *m;
rtems_event_set events;
for (;;) {
/*
* Wait for packet
*/
rtems_bsdnet_event_receive (START_TRANSMIT_EVENT, RTEMS_EVENT_ANY | RTEMS_WAIT, RTEMS_NO_TIMEOUT, &events);
/*
* Send packets till queue is empty
*/
for (;;) {
/*
* Get the next mbuf chain to transmit.
*/
IF_DEQUEUE(&ifp->if_snd, m);
if (!m)
break;
sendpacket (ifp, m);
}
ifp->if_flags &= ~IFF_OACTIVE;
}
}
/*
* Send packet (caller provides header).
*/
static void
scc_start (struct ifnet *ifp)
{
struct scc_softc *sc = ifp->if_softc;
rtems_event_send (sc->txDaemonTid, START_TRANSMIT_EVENT);
ifp->if_flags |= IFF_OACTIVE;
}
/*
* Initialize and start the device
*/
static void
scc_init (void *arg)
{
struct scc_softc *sc = arg;
struct ifnet *ifp = &sc->arpcom.ac_if;
if (sc->txDaemonTid == 0) {
/*
* Set up SCC hardware
*/
m360Enet_initialize_hardware (sc);
/*
* Start driver tasks
*/
sc->txDaemonTid = rtems_bsdnet_newproc ("SCtx", 4096, scc_txDaemon, sc);
sc->rxDaemonTid = rtems_bsdnet_newproc ("SCrx", 4096, scc_rxDaemon, sc);
}
/*
* Set flags appropriately
*/
if (ifp->if_flags & IFF_PROMISC)
m360.scc1.psmr |= 0x200;
else
m360.scc1.psmr &= ~0x200;
/*
* Tell the world that we're running.
*/
ifp->if_flags |= IFF_RUNNING;
/*
* Enable receiver and transmitter
*/
m360.scc1.gsmr_l |= 0x30;
}
/*
* Stop the device
*/
static void
scc_stop (struct scc_softc *sc)
{
struct ifnet *ifp = &sc->arpcom.ac_if;
ifp->if_flags &= ~IFF_RUNNING;
/*
* Shut down receiver and transmitter
*/
m360.scc1.gsmr_l &= ~0x30;
}
/*
* Show interface statistics
*/
static void
scc_stats (struct scc_softc *sc)
{
printf (" Rx Interrupts:%-8lu", sc->rxInterrupts);
printf (" Not First:%-8lu", sc->rxNotFirst);
printf (" Not Last:%-8lu\n", sc->rxNotLast);
printf (" Giant:%-8lu", sc->rxGiant);
printf (" Runt:%-8lu", sc->rxRunt);
printf (" Non-octet:%-8lu\n", sc->rxNonOctet);
printf (" Bad CRC:%-8lu", sc->rxBadCRC);
printf (" Overrun:%-8lu", sc->rxOverrun);
printf (" Collision:%-8lu\n", sc->rxCollision);
printf (" Discarded:%-8lu\n", (unsigned long)m360.scc1p.un.ethernet.disfc);
printf (" Tx Interrupts:%-8lu", sc->txInterrupts);
printf (" Deferred:%-8lu", sc->txDeferred);
printf (" Missed Hearbeat:%-8lu\n", sc->txHeartbeat);
printf (" No Carrier:%-8lu", sc->txLostCarrier);
printf ("Retransmit Limit:%-8lu", sc->txRetryLimit);
printf (" Late Collision:%-8lu\n", sc->txLateCollision);
printf (" Underrun:%-8lu", sc->txUnderrun);
printf (" Raw output wait:%-8lu\n", sc->txRawWait);
}
/*
* Driver ioctl handler
*/
static int
scc_ioctl (struct ifnet *ifp, int command, caddr_t data)
{
struct scc_softc *sc = ifp->if_softc;
int error = 0;
switch (command) {
case SIOCGIFADDR:
case SIOCSIFADDR:
ether_ioctl (ifp, command, data);
break;
case SIOCSIFFLAGS:
switch (ifp->if_flags & (IFF_UP | IFF_RUNNING)) {
case IFF_RUNNING:
scc_stop (sc);
break;
case IFF_UP:
scc_init (sc);
break;
case IFF_UP | IFF_RUNNING:
scc_stop (sc);
scc_init (sc);
break;
default:
break;
}
break;
case SIO_RTEMS_SHOW_STATS:
scc_stats (sc);
break;
/*
* FIXME: All sorts of multicast commands need to be added here!
*/
default:
error = EINVAL;
break;
}
return error;
}
/*
* Attach an SCC driver to the system
*/
int
rtems_scc1_driver_attach (struct rtems_bsdnet_ifconfig *config)
{
struct scc_softc *sc;
struct ifnet *ifp;
int mtu;
int unitNumber;
char *unitName;
/*
* Parse driver name
*/
if ((unitNumber = rtems_bsdnet_parse_driver_name (config, &unitName)) < 0)
return 0;
/*
* Is driver free?
*/
if ((unitNumber <= 0) || (unitNumber > NSCCDRIVER)) {
printf ("Bad SCC unit number.\n");
return 0;
}
sc = &scc_softc[unitNumber - 1];
ifp = &sc->arpcom.ac_if;
if (ifp->if_softc != NULL) {
printf ("Driver already in use.\n");
return 0;
}
/*
* Process options
*/
if (config->hardware_address) {
memcpy (sc->arpcom.ac_enaddr, config->hardware_address, ETHER_ADDR_LEN);
}
else {
/*
* The first 4 bytes of the bootstrap prom
* contain the value loaded into the stack
* pointer as part of the CPU32's hardware
* reset exception handler. The following
* 4 bytes contain the value loaded into the
* program counter. The boards' Ethernet
* address is stored in the six bytes
* immediately preceding this initial
* program counter value.
*
* See start360/start360.s.
*/
extern void *_RomBase; /* From linkcmds */
const unsigned long *ExceptionVectors;
const unsigned char *entryPoint;
/*
* Sanity check -- assume entry point must be
* within 1 MByte of beginning of boot ROM.
*/
ExceptionVectors = (const unsigned long *)&_RomBase;
entryPoint = (const unsigned char *)ExceptionVectors[1];
if (((unsigned long)entryPoint - (unsigned long)ExceptionVectors)
>= (1 * 1024 * 1024)) {
printf ("Warning -- Ethernet address can not be found in bootstrap PROM.\n");
sc->arpcom.ac_enaddr[0] = 0x08;
sc->arpcom.ac_enaddr[1] = 0xF3;
sc->arpcom.ac_enaddr[2] = 0x3E;
sc->arpcom.ac_enaddr[3] = 0xC2;
sc->arpcom.ac_enaddr[4] = 0x7E;
sc->arpcom.ac_enaddr[5] = 0x38;
}
else {
memcpy (sc->arpcom.ac_enaddr, entryPoint - ETHER_ADDR_LEN, ETHER_ADDR_LEN);
}
}
if (config->mtu)
mtu = config->mtu;
else
mtu = ETHERMTU;
if (config->rbuf_count)
sc->rxBdCount = config->rbuf_count;
else
sc->rxBdCount = RX_BUF_COUNT;
if (config->xbuf_count)
sc->txBdCount = config->xbuf_count;
else
sc->txBdCount = TX_BUF_COUNT * TX_BD_PER_BUF;
sc->acceptBroadcast = !config->ignore_broadcast;
/*
* Set up network interface values
*/
ifp->if_softc = sc;
ifp->if_unit = unitNumber;
ifp->if_name = unitName;
ifp->if_mtu = mtu;
ifp->if_init = scc_init;
ifp->if_ioctl = scc_ioctl;
ifp->if_start = scc_start;
ifp->if_output = ether_output;
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX;
if (ifp->if_snd.ifq_maxlen == 0)
ifp->if_snd.ifq_maxlen = ifqmaxlen;
/*
* Attach the interface
*/
if_attach (ifp);
ether_ifattach (ifp);
return 1;
};