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freebsd-skq/sys/i386/boot/netboot/ns8390.c
phk 406115eeb3 These are a selection of small problems and annoyances with the netboot 
code. Apart from the first one, none really affect typical configurations
but are nevertheless unnecessary limitations. We use netbooted PCs as
student X-terminals and all of the below fixes have been useful. Apologies
for including them all in one PR, but some are just too silly or trivial
to send on their own!

a)     Newer SMC cards have hardware addresses starting with 00:E0.
      Netboot compares the MAC address with 00:00:C0 to determine
      if it is a WD/SMC card, so it fails to detect these.

b)     Netboot is unable to boot kzipped kernels, as it assumes that
      the kernel load address is 0x100000.

c)     Users can abort the booting process and enter arbitrary network
      addresses, or boot from a floppy disk. This can be a problem when
      netbooted machines are used in a student environment.

d)     It is not possible to set all options via bootp. For example there
      is no way to remotely force a client to boot from disk. With both
      SECURE_BOOT(patch below) and NO_TFTP defined, short of unplugging
      the eprom there is no way at all to get the client to boot locally.
      A generic solution is to allow complete netboot commands to be sent
      using bootp lines such as:
	      :T132="diskboot":
e)     The last character of netboot command names is not checked. You
      can type 'iz 10.0.0.1' and it will be interpreted as 'ip'. This
      is only important if you try to add a new command which is the
      same as an existing one except for the last character.

f)     We have a configuration where multiple servers are willing to serve
      a diskless client. The tftp config file, or the bootptab entry on
      each server must specify the root and swap filesystems as 'ip:/fs'
      even though 'ip' will usually be the responding server's IP address.
      It would be nice if netboot could automatically prepend the server's
      IP address to an entry specified as just '/fs', so that multiple
      servers can use the same tftp or bootp configuration files. Admittedly
      this is hardly a major problem!

PR:		7098
Submitted by:	Ian Dowse <iedowse@maths.tcd.ie>
1998-06-30 11:10:29 +00:00

669 lines
22 KiB
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/**************************************************************************
NETBOOT - BOOTP/TFTP Bootstrap Program
Author: Martin Renters
Date: May/94
This code is based heavily on David Greenman's if_ed.c driver
Copyright (C) 1993-1994, David Greenman, Martin Renters.
This software may be used, modified, copied, distributed, and sold, in
both source and binary form provided that the above copyright and these
terms are retained. Under no circumstances are the authors responsible for
the proper functioning of this software, nor do the authors assume any
responsibility for damages incurred with its use.
3c503 support added by Bill Paul (wpaul@ctr.columbia.edu) on 11/15/94
SMC8416 support added by Bill Paul (wpaul@ctr.columbia.edu) on 12/25/94
**************************************************************************/
DELAY(int x)
{ volatile long a, b, l;
for (x; x>0; x--) b=a;
}
#include "netboot.h"
#include "ns8390.h"
#ifdef _3COM_USE_AUI
short aui=1;
#else
short aui=0;
#endif
unsigned short eth_nic_base;
unsigned short eth_asic_base;
unsigned char eth_tx_start;
unsigned char eth_laar;
unsigned char eth_flags;
unsigned char eth_vendor;
unsigned char eth_memsize;
unsigned char *eth_bmem;
unsigned char *eth_rmem;
unsigned char *eth_node_addr;
/**************************************************************************
The following two variables are used externally
**************************************************************************/
char eth_driver[] = "ed0";
char packet[ETHER_MAX_LEN];
int packetlen;
#ifdef INCLUDE_NE
static unsigned short ne_base_list[]= {
#ifdef NE_BASE
NE_BASE,
#endif
0xff80, 0xff40, 0xff00, 0xfec0,
0x280, 0x300, 0
};
#endif
/**************************************************************************
ETH_PROBE - Look for an adapter
**************************************************************************/
eth_probe()
{
int i;
struct wd_board *brd;
char *name;
unsigned short chksum;
unsigned char c;
eth_vendor = VENDOR_NONE;
#ifdef INCLUDE_WD
/******************************************************************
Search for WD/SMC cards
******************************************************************/
for (eth_asic_base = WD_LOW_BASE; eth_asic_base <= WD_HIGH_BASE;
eth_asic_base += 0x20) {
chksum = 0;
/* Check for WD/SMC card by checking ethernet address */
if (inb(eth_asic_base+8) != 0) continue;
if (inb(eth_asic_base+9) != 0xE0) {
if (inb(eth_asic_base+9) != 0) continue;
if (inb(eth_asic_base+10) != 0xC0) continue;
}
for (i=8; i<16; i++)
chksum += inb(i+eth_asic_base);
if ((chksum & 0x00FF) == 0x00FF)
break;
}
if (eth_asic_base <= WD_HIGH_BASE) { /* We've found a board */
eth_vendor = VENDOR_WD;
eth_nic_base = eth_asic_base + WD_NIC_ADDR;
c = inb(eth_asic_base+WD_BID); /* Get board id */
for (brd = wd_boards; brd->name; brd++)
if (brd->id == c) break;
if (!brd->name) {
printf("\r\nUnknown Ethernet type %x\r\n", c);
return(0); /* Unknown type */
}
eth_flags = brd->flags;
eth_memsize = brd->memsize;
eth_tx_start = 0;
if ((c == TYPE_WD8013EP) &&
(inb(eth_asic_base + WD_ICR) & WD_ICR_16BIT)) {
eth_flags = FLAG_16BIT;
eth_memsize = MEM_16384;
}
if ((c & WD_SOFTCONFIG) && (!(eth_flags & FLAG_790))) {
eth_bmem = (char *)(0x80000 |
((inb(eth_asic_base + WD_MSR) & 0x3F) << 13));
} else
eth_bmem = (char *)WD_DEFAULT_MEM;
if (brd->id == TYPE_SMC8216T || brd->id == TYPE_SMC8216C) {
(unsigned int) *(eth_bmem + 8192) = (unsigned int)0;
if ((unsigned int) *(eth_bmem + 8192)) {
brd += 2;
eth_memsize = brd->memsize;
}
}
outb(eth_asic_base + WD_MSR, 0x80); /* Reset */
printf("\r\n%s base 0x%x, memory 0x%X, addr ",
brd->name, eth_asic_base, eth_bmem);
for (i=0; i<6; i++) {
printf("%b",(int)(arptable[ARP_CLIENT].node[i] =
inb(i+eth_asic_base+WD_LAR)));
if (i < 5) printf (":");
}
if (eth_flags & FLAG_790) {
outb(eth_asic_base+WD_MSR, WD_MSR_MENB);
outb(eth_asic_base+0x04, (inb(eth_asic_base+0x04) |
0x80));
outb(eth_asic_base+0x0B,
(((unsigned)eth_bmem >> 13) & 0x0F) |
(((unsigned)eth_bmem >> 11) & 0x40) |
(inb(eth_asic_base+0x0B) & 0xB0));
outb(eth_asic_base+0x04, (inb(eth_asic_base+0x04) &
~0x80));
} else {
outb(eth_asic_base+WD_MSR,
(((unsigned)eth_bmem >> 13) & 0x3F) | 0x40);
}
if (eth_flags & FLAG_16BIT) {
if (eth_flags & FLAG_790) {
eth_laar = inb(eth_asic_base + WD_LAAR);
outb(eth_asic_base + WD_LAAR, WD_LAAR_M16EN);
inb(0x84);
} else {
outb(eth_asic_base + WD_LAAR, (eth_laar =
WD_LAAR_M16EN | WD_LAAR_L16EN | 1));
}
}
goto found_board;
}
#endif
#ifdef INCLUDE_3COM
/******************************************************************
Search for 3Com 3c503 if no WD/SMC cards
******************************************************************/
if (eth_vendor == VENDOR_NONE) {
eth_asic_base = _3COM_BASE + _3COM_ASIC_OFFSET;
eth_nic_base = _3COM_BASE;
eth_vendor = VENDOR_3COM;
/*
* Note that we use the same settings for both 8 and 16 bit cards:
* both have an 8K bank of memory at page 1 while only the 16 bit
* cards have a bank at page 0.
*/
eth_memsize = MEM_16384;
eth_tx_start = 32;
/* Check our base address */
switch(inb(eth_asic_base + _3COM_BCFR)) {
case _3COM_BCFR_300:
if ((int)eth_nic_base != 0x300)
return(0);
break;
case _3COM_BCFR_310:
if ((int)eth_nic_base != 0x310)
return(0);
break;
case _3COM_BCFR_330:
if ((int)eth_nic_base != 0x330)
return(0);
break;
case _3COM_BCFR_350:
if ((int)eth_nic_base != 0x350)
return(0);
break;
case _3COM_BCFR_250:
if ((int)eth_nic_base != 0x250)
return(0);
break;
case _3COM_BCFR_280:
if ((int)eth_nic_base != 0x280)
return(0);
break;
case _3COM_BCFR_2A0:
if ((int)eth_nic_base != 0x2a0)
return(0);
break;
case _3COM_BCFR_2E0:
if ((int)eth_nic_base != 0x2e0)
return(0);
break;
default:
return (0);
}
/* Now get the shared memory address */
switch (inb(eth_asic_base + _3COM_PCFR)) {
case _3COM_PCFR_DC000:
eth_bmem = (char *)0xdc000;
break;
case _3COM_PCFR_D8000:
eth_bmem = (char *)0xd8000;
break;
case _3COM_PCFR_CC000:
eth_bmem = (char *)0xcc000;
break;
case _3COM_PCFR_C8000:
eth_bmem = (char *)0xc8000;
break;
default:
return (0);
}
/* Need this to make eth_poll() happy. */
eth_rmem = eth_bmem - 0x2000;
/* Reset NIC and ASIC */
outb (eth_asic_base + _3COM_CR , _3COM_CR_RST | _3COM_CR_XSEL);
outb (eth_asic_base + _3COM_CR , _3COM_CR_XSEL);
/* Get our ethernet address */
outb(eth_asic_base + _3COM_CR, _3COM_CR_EALO | _3COM_CR_XSEL);
printf("\r\n3Com 3c503 base 0x%x, memory 0x%X addr ",
eth_nic_base, eth_bmem);
for (i=0; i<6; i++) {
printf("%b",(int)(arptable[ARP_CLIENT].node[i] =
inb(eth_nic_base+i)));
if (i < 5) printf (":");
}
outb(eth_asic_base + _3COM_CR, _3COM_CR_XSEL);
/*
* Initialize GA configuration register. Set bank and enable shared
* mem. We always use bank 1.
*/
outb(eth_asic_base + _3COM_GACFR, _3COM_GACFR_RSEL |
_3COM_GACFR_MBS0);
outb(eth_asic_base + _3COM_VPTR2, 0xff);
outb(eth_asic_base + _3COM_VPTR1, 0xff);
outb(eth_asic_base + _3COM_VPTR0, 0x00);
/*
* Clear memory and verify that it worked (we use only 8K)
*/
bzero(eth_bmem, 0x2000);
for(i = 0; i < 0x2000; ++i)
if (*((eth_bmem)+i)) {
printf ("Failed to clear 3c503 shared mem.\r\n");
return (0);
}
/*
* Initialize GA page/start/stop registers.
*/
outb(eth_asic_base + _3COM_PSTR, eth_tx_start);
outb(eth_asic_base + _3COM_PSPR, eth_memsize);
goto found_board;
}
#endif
#ifdef INCLUDE_NE
/******************************************************************
Search for NE1000/2000 if no WD/SMC or 3com cards
******************************************************************/
if (eth_vendor == VENDOR_NONE) {
char romdata[16], testbuf[32];
char test[] = "NE1000/2000 memory";
unsigned short *tent_base=ne_base_list;
eth_bmem = (char *)0; /* No shared memory */
ne_again:
eth_asic_base = *tent_base + NE_ASIC_OFFSET;
eth_nic_base = *tent_base;
printf("Looking for NE1000/NE2000 at 0x%x\n", eth_nic_base);
eth_vendor = VENDOR_NOVELL;
eth_flags = FLAG_PIO;
eth_memsize = MEM_16384;
eth_tx_start = 32;
#ifdef GWETHER
outb(eth_asic_base + NE_RESET, 0);
DELAY(200);
#endif
c = inb(eth_asic_base + NE_RESET);
outb(eth_asic_base + NE_RESET, c);
DELAY(5000);
inb(0x84);
outb(eth_nic_base + D8390_P0_COMMAND, D8390_COMMAND_STP |
D8390_COMMAND_RD2);
outb(eth_nic_base + D8390_P0_RCR, D8390_RCR_MON);
outb(eth_nic_base + D8390_P0_DCR, D8390_DCR_FT1 | D8390_DCR_LS);
outb(eth_nic_base + D8390_P0_PSTART, MEM_8192);
outb(eth_nic_base + D8390_P0_PSTOP, MEM_16384);
eth_pio_write(test, 8192, sizeof(test));
eth_pio_read(8192, testbuf, sizeof(test));
if (!bcompare(test, testbuf, sizeof(test))) {
eth_flags |= FLAG_16BIT;
eth_memsize = MEM_32768;
eth_tx_start = 64;
outb(eth_nic_base + D8390_P0_DCR, D8390_DCR_WTS |
D8390_DCR_FT1 | D8390_DCR_LS);
outb(eth_nic_base + D8390_P0_PSTART, MEM_16384);
outb(eth_nic_base + D8390_P0_PSTOP, MEM_32768);
eth_pio_write(test, 16384, sizeof(test));
eth_pio_read(16384, testbuf, sizeof(test));
if (!bcompare(testbuf, test, sizeof(test)))
if (*++tent_base)
goto ne_again;
else
return (0);
}
eth_pio_read(0, romdata, 16);
printf("\nNE1000/NE2000 (%d bit) base 0x%x, addr ",
eth_flags & FLAG_16BIT ? 16:8, eth_nic_base);
for (i=0; i<6; i++) {
printf("%b",(int)(arptable[ARP_CLIENT].node[i] = romdata[i
+ ((eth_flags & FLAG_16BIT) ? i : 0)]));
if (i < 5) printf (":");
}
goto found_board;
}
#endif
found_board:
printf("\r\n");
if (eth_vendor == VENDOR_NONE) return(0);
if (eth_vendor != VENDOR_3COM) eth_rmem = eth_bmem;
eth_node_addr = arptable[ARP_CLIENT].node;
eth_reset();
return(eth_vendor);
}
/**************************************************************************
ETH_RESET - Reset adapter
**************************************************************************/
eth_reset()
{
int i;
if (eth_flags & FLAG_790)
outb(eth_nic_base+D8390_P0_COMMAND,
D8390_COMMAND_PS0 | D8390_COMMAND_STP);
else
outb(eth_nic_base+D8390_P0_COMMAND,
D8390_COMMAND_PS0 | D8390_COMMAND_RD2 |
D8390_COMMAND_STP);
if (eth_flags & FLAG_16BIT)
outb(eth_nic_base+D8390_P0_DCR, 0x49);
else
outb(eth_nic_base+D8390_P0_DCR, 0x48);
outb(eth_nic_base+D8390_P0_RBCR0, 0);
outb(eth_nic_base+D8390_P0_RBCR1, 0);
outb(eth_nic_base+D8390_P0_RCR, 4); /* allow broadcast frames */
outb(eth_nic_base+D8390_P0_TCR, 2);
outb(eth_nic_base+D8390_P0_TPSR, eth_tx_start);
outb(eth_nic_base+D8390_P0_PSTART, eth_tx_start + D8390_TXBUF_SIZE);
if (eth_flags & FLAG_790) outb(eth_nic_base + 0x09, 0);
outb(eth_nic_base+D8390_P0_PSTOP, eth_memsize);
outb(eth_nic_base+D8390_P0_BOUND, eth_tx_start + D8390_TXBUF_SIZE);
outb(eth_nic_base+D8390_P0_ISR, 0xFF);
outb(eth_nic_base+D8390_P0_IMR, 0);
if (eth_flags & FLAG_790)
outb(eth_nic_base+D8390_P0_COMMAND, D8390_COMMAND_PS1 |
D8390_COMMAND_STP);
else
outb(eth_nic_base+D8390_P0_COMMAND, D8390_COMMAND_PS1 |
D8390_COMMAND_RD2 | D8390_COMMAND_STP);
for (i=0; i<6; i++)
outb(eth_nic_base+D8390_P1_PAR0+i, eth_node_addr[i]);
for (i=0; i<6; i++)
outb(eth_nic_base+D8390_P1_MAR0+i, 0xFF);
outb(eth_nic_base+D8390_P1_CURR, eth_tx_start + D8390_TXBUF_SIZE+1);
if (eth_flags & FLAG_790)
outb(eth_nic_base+D8390_P0_COMMAND, D8390_COMMAND_PS0 |
D8390_COMMAND_STA);
else
outb(eth_nic_base+D8390_P0_COMMAND, D8390_COMMAND_PS0 |
D8390_COMMAND_RD2 | D8390_COMMAND_STA);
outb(eth_nic_base+D8390_P0_ISR, 0xFF);
outb(eth_nic_base+D8390_P0_TCR, 0);
#ifdef INCLUDE_3COM
if (eth_vendor == VENDOR_3COM) {
/*
* No way to tell whether or not we're supposed to use
* the 3Com's transceiver unless the user tells us.
* 'aui' should have some compile time default value
* which can be changed from the command menu.
*/
if (aui)
outb(eth_asic_base + _3COM_CR, 0);
else
outb(eth_asic_base + _3COM_CR, _3COM_CR_XSEL);
}
#endif
return(1);
}
/**************************************************************************
ETH_TRANSMIT - Transmit a frame
**************************************************************************/
eth_transmit(d,t,s,p)
char *d; /* Destination */
unsigned short t; /* Type */
unsigned short s; /* size */
char *p; /* Packet */
{
unsigned char c;
#ifdef INCLUDE_3COM
if (eth_vendor == VENDOR_3COM) {
bcopy(d, eth_bmem, 6); /* dst */
bcopy(eth_node_addr, eth_bmem+6, ETHER_ADDR_LEN); /* src */
*(eth_bmem+12) = t>>8; /* type */
*(eth_bmem+13) = t;
bcopy(p, eth_bmem+14, s);
s += 14;
while (s < ETHER_MIN_LEN) *(eth_bmem+(s++)) = 0;
}
#endif
#ifdef INCLUDE_WD
if (eth_vendor == VENDOR_WD) { /* Memory interface */
if (eth_flags & FLAG_16BIT) {
outb(eth_asic_base + WD_LAAR, eth_laar | WD_LAAR_M16EN);
inb(0x84);
}
if (eth_flags & FLAG_790) {
outb(eth_asic_base + WD_MSR, WD_MSR_MENB);
inb(0x84);
}
inb(0x84);
bcopy(d, eth_bmem, 6); /* dst */
bcopy(eth_node_addr, eth_bmem+6, ETHER_ADDR_LEN); /* src */
*(eth_bmem+12) = t>>8; /* type */
*(eth_bmem+13) = t;
bcopy(p, eth_bmem+14, s);
s += 14;
while (s < ETHER_MIN_LEN) *(eth_bmem+(s++)) = 0;
if (eth_flags & FLAG_790) {
outb(eth_asic_base + WD_MSR, 0);
inb(0x84);
}
if (eth_flags & FLAG_16BIT) {
outb(eth_asic_base + WD_LAAR, eth_laar & ~WD_LAAR_M16EN);
inb(0x84);
}
}
#endif
#ifdef INCLUDE_NE
if (eth_vendor == VENDOR_NOVELL) { /* Programmed I/O */
unsigned short type;
type = (t >> 8) | (t << 8);
eth_pio_write(d, eth_tx_start<<8, 6);
eth_pio_write(eth_node_addr, (eth_tx_start<<8)+6, 6);
eth_pio_write(&type, (eth_tx_start<<8)+12, 2);
eth_pio_write(p, (eth_tx_start<<8)+14, s);
s += 14;
if (s < ETHER_MIN_LEN) s = ETHER_MIN_LEN;
}
#endif
twiddle();
if (eth_flags & FLAG_790)
outb(eth_nic_base+D8390_P0_COMMAND, D8390_COMMAND_PS0 |
D8390_COMMAND_STA);
else
outb(eth_nic_base+D8390_P0_COMMAND, D8390_COMMAND_PS0 |
D8390_COMMAND_RD2 | D8390_COMMAND_STA);
outb(eth_nic_base+D8390_P0_TPSR, eth_tx_start);
outb(eth_nic_base+D8390_P0_TBCR0, s);
outb(eth_nic_base+D8390_P0_TBCR1, s>>8);
if (eth_flags & FLAG_790)
outb(eth_nic_base+D8390_P0_COMMAND, D8390_COMMAND_PS0 |
D8390_COMMAND_TXP | D8390_COMMAND_STA);
else
outb(eth_nic_base+D8390_P0_COMMAND, D8390_COMMAND_PS0 |
D8390_COMMAND_TXP | D8390_COMMAND_RD2 |
D8390_COMMAND_STA);
return(0);
}
/**************************************************************************
ETH_POLL - Wait for a frame
**************************************************************************/
eth_poll()
{
int ret = 0;
unsigned short type = 0;
unsigned char bound,curr,rstat;
unsigned short len, copylen;
unsigned short pktoff;
unsigned char *p;
struct ringbuffer pkthdr;
rstat = inb(eth_nic_base+D8390_P0_RSR);
if (rstat & D8390_RSTAT_OVER) {
eth_reset();
return(0);
}
if (!(rstat & D8390_RSTAT_PRX)) return(0);
bound = inb(eth_nic_base+D8390_P0_BOUND)+1;
if (bound == eth_memsize) bound = eth_tx_start + D8390_TXBUF_SIZE;
outb(eth_nic_base+D8390_P0_COMMAND, D8390_COMMAND_PS1);
curr = inb(eth_nic_base+D8390_P1_CURR);
outb(eth_nic_base+D8390_P0_COMMAND, D8390_COMMAND_PS0);
if (curr == eth_memsize) curr=eth_tx_start + D8390_TXBUF_SIZE;
if (curr == bound) return(0);
if (eth_vendor == VENDOR_WD) {
if (eth_flags & FLAG_16BIT) {
outb(eth_asic_base + WD_LAAR, eth_laar | WD_LAAR_M16EN);
inb(0x84);
}
if (eth_flags & FLAG_790) {
outb(eth_asic_base + WD_MSR, WD_MSR_MENB);
inb(0x84);
}
inb(0x84);
}
pktoff = (bound << 8);
if (eth_flags & FLAG_PIO)
eth_pio_read(pktoff, &pkthdr, 4);
else
bcopy(eth_rmem + pktoff, &pkthdr, 4);
len = pkthdr.len - 4; /* sub CRC */
pktoff += 4;
if (len > 1514) len = 1514;
bound = pkthdr.bound; /* New bound ptr */
if ( (pkthdr.status & D8390_RSTAT_PRX) && (len > 14) && (len < 1518)) {
p = packet;
packetlen = copylen = len;
len = (eth_memsize << 8) - pktoff;
if (packetlen > len) { /* We have a wrap-around */
if (eth_flags & FLAG_PIO)
eth_pio_read(pktoff, p, len);
else
bcopy(eth_rmem + pktoff, p, len);
pktoff = (eth_tx_start + D8390_TXBUF_SIZE) << 8;
p += len;
copylen -= len;
}
if (eth_flags & FLAG_PIO)
eth_pio_read(pktoff, p, copylen);
else
bcopy(eth_rmem + pktoff, p, copylen);
type = (packet[12]<<8) | packet[13];
ret = 1;
}
if (eth_vendor == VENDOR_WD) {
if (eth_flags & FLAG_790) {
outb(eth_asic_base + WD_MSR, 0);
inb(0x84);
}
if (eth_flags & FLAG_16BIT) {
outb(eth_asic_base + WD_LAAR, eth_laar &
~WD_LAAR_M16EN);
inb(0x84);
}
inb(0x84);
}
if (bound == (eth_tx_start + D8390_TXBUF_SIZE))
bound = eth_memsize;
outb(eth_nic_base+D8390_P0_BOUND, bound-1);
if (ret && (type == ARP)) {
struct arprequest *arpreq;
unsigned long reqip;
arpreq = (struct arprequest *)&packet[ETHER_HDR_LEN];
convert_ipaddr(&reqip, arpreq->tipaddr);
if ((ntohs(arpreq->opcode) == ARP_REQUEST) &&
(reqip == arptable[ARP_CLIENT].ipaddr)) {
arpreq->opcode = htons(ARP_REPLY);
bcopy(arpreq->sipaddr, arpreq->tipaddr, 4);
bcopy(arpreq->shwaddr, arpreq->thwaddr, 6);
bcopy(arptable[ARP_CLIENT].node, arpreq->shwaddr, 6);
convert_ipaddr(arpreq->sipaddr, &reqip);
eth_transmit(arpreq->thwaddr, ARP, sizeof(struct arprequest),
arpreq);
return(0);
}
}
return(ret);
}
#ifdef INCLUDE_NE
/**************************************************************************
ETH_PIO_READ - Read a frame via Programmed I/O
**************************************************************************/
eth_pio_read(src, dst, cnt)
unsigned short src;
unsigned char *dst;
unsigned short cnt;
{
if (cnt & 1) cnt++;
outb(eth_nic_base + D8390_P0_COMMAND, D8390_COMMAND_RD2 |
D8390_COMMAND_STA);
outb(eth_nic_base + D8390_P0_RBCR0, cnt);
outb(eth_nic_base + D8390_P0_RBCR1, cnt>>8);
outb(eth_nic_base + D8390_P0_RSAR0, src);
outb(eth_nic_base + D8390_P0_RSAR1, src>>8);
outb(eth_nic_base + D8390_P0_COMMAND, D8390_COMMAND_RD0 |
D8390_COMMAND_STA);
if (eth_flags & FLAG_16BIT) {
while (cnt) {
*((unsigned short *)dst) = inw(eth_asic_base + NE_DATA);
dst += 2;
cnt -= 2;
}
}
else {
while (cnt--)
*(dst++) = inb(eth_asic_base + NE_DATA);
}
}
/**************************************************************************
ETH_PIO_WRITE - Write a frame via Programmed I/O
**************************************************************************/
eth_pio_write(src, dst, cnt)
unsigned char *src;
unsigned short dst;
unsigned short cnt;
{
outb(eth_nic_base + D8390_P0_COMMAND, D8390_COMMAND_RD2 |
D8390_COMMAND_STA);
outb(eth_nic_base + D8390_P0_ISR, D8390_ISR_RDC);
outb(eth_nic_base + D8390_P0_RBCR0, cnt);
outb(eth_nic_base + D8390_P0_RBCR1, cnt>>8);
outb(eth_nic_base + D8390_P0_RSAR0, dst);
outb(eth_nic_base + D8390_P0_RSAR1, dst>>8);
outb(eth_nic_base + D8390_P0_COMMAND, D8390_COMMAND_RD1 |
D8390_COMMAND_STA);
if (eth_flags & FLAG_16BIT) {
if (cnt & 1) cnt++; /* Round up */
while (cnt) {
outw(eth_asic_base + NE_DATA, *((unsigned short *)src));
src += 2;
cnt -= 2;
}
}
else {
while (cnt--)
outb(eth_asic_base + NE_DATA, *(src++));
}
cnt = 200;
while((inb(eth_nic_base + D8390_P0_ISR) & D8390_ISR_RDC)
!= D8390_ISR_RDC && --cnt);
}
#else
/**************************************************************************
ETH_PIO_READ - Dummy routine when NE2000 not compiled in
**************************************************************************/
eth_pio_read() {}
#endif
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