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/* |
/* |
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* Copyright (C) 2003-2005 Anders Gavare. All rights reserved. |
* Copyright (C) 2003-2006 Anders Gavare. All rights reserved. |
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* |
* |
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* Redistribution and use in source and binary forms, with or without |
* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions are met: |
* modification, are permitted provided that the following conditions are met: |
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* SUCH DAMAGE. |
* SUCH DAMAGE. |
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* |
* |
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* |
* |
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* $Id: dev_le.c,v 1.43 2005/07/27 06:57:34 debug Exp $ |
* $Id: dev_le.c,v 1.51 2006/07/14 16:33:28 debug Exp $ |
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* |
* |
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* LANCE ethernet, as used in DECstations. |
* LANCE ethernet, as used in DECstations. |
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* |
* |
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* |
* |
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* TODO: Error conditions (such as when there are not enough receive |
* TODO: Error conditions (such as when there are not enough receive |
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* buffers) are not emulated yet. |
* buffers) are not emulated yet. |
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* |
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* (Old bug, but probably still valid: "UDP packets that are too |
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* large are not handled well by the Lance device.") |
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*/ |
*/ |
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#include <stdio.h> |
#include <stdio.h> |
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{ |
{ |
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int start_txp = d->txp; |
int start_txp = d->txp; |
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uint16_t tx_descr[4]; |
uint16_t tx_descr[4]; |
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int stp, enp, i, cur_packet_offset; |
int stp, enp, cur_packet_offset; |
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size_t i; |
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uint32_t bufaddr, buflen; |
uint32_t bufaddr, buflen; |
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/* TODO: This is just a guess: */ |
/* TODO: This is just a guess: */ |
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*/ |
*/ |
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static void le_rx(struct net *net, struct le_data *d) |
static void le_rx(struct net *net, struct le_data *d) |
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{ |
{ |
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int i, start_rxp = d->rxp; |
int start_rxp = d->rxp; |
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size_t i; |
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uint16_t rx_descr[4]; |
uint16_t rx_descr[4]; |
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uint32_t bufaddr, buflen; |
uint32_t bufaddr, buflen; |
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/* Copy data from the packet into SRAM: */ |
/* Copy data from the packet into SRAM: */ |
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for (i=0; i<buflen; i++) { |
for (i=0; i<buflen; i++) { |
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if (d->rx_packet_offset + i >= d->rx_packet_len) |
if (d->rx_packet_offset+(ssize_t)i >= d->rx_packet_len) |
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break; |
break; |
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d->sram[(bufaddr + i) & (SRAM_SIZE-1)] = |
d->sram[(bufaddr + i) & (SRAM_SIZE-1)] = |
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d->rx_packet[d->rx_packet_offset + i]; |
d->rx_packet[d->rx_packet_offset + i]; |
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} |
} |
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/* |
DEVICE_ACCESS(le_sram) |
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* dev_le_sram_access(): |
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*/ |
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int dev_le_sram_access(struct cpu *cpu, struct memory *mem, |
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uint64_t relative_addr, unsigned char *data, size_t len, |
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int writeflag, void *extra) |
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{ |
{ |
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int i, retval; |
size_t i; |
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int retval; |
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struct le_data *d = extra; |
struct le_data *d = extra; |
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#ifdef LE_DEBUG |
#ifdef LE_DEBUG |
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} |
} |
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/* |
DEVICE_ACCESS(le) |
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* dev_le_access(): |
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*/ |
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int dev_le_access(struct cpu *cpu, struct memory *mem, uint64_t relative_addr, |
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unsigned char *data, size_t len, int writeflag, void *extra) |
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{ |
{ |
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uint64_t idata = 0, odata = 0; |
uint64_t idata = 0, odata = 0; |
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int i, retval = 1; |
size_t i; |
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int retval = 1; |
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struct le_data *d = extra; |
struct le_data *d = extra; |
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idata = memory_readmax64(cpu, data, len); |
if (writeflag == MEM_WRITE) |
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idata = memory_readmax64(cpu, data, len); |
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#ifdef LE_DEBUG |
#ifdef LE_DEBUG |
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if (writeflag == MEM_WRITE) { |
if (writeflag == MEM_WRITE) { |
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/* Read from station's ROM (ethernet address): */ |
/* Read from station's ROM (ethernet address): */ |
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if (relative_addr >= 0xc0000 && relative_addr <= 0xfffff) { |
if (relative_addr >= 0xc0000 && relative_addr <= 0xfffff) { |
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i = (relative_addr & 0xff) / 4; |
uint32_t a; |
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i = d->rom[i & (ROM_SIZE-1)]; |
int j = (relative_addr & 0xff) / 4; |
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a = d->rom[j & (ROM_SIZE-1)]; |
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if (writeflag == MEM_READ) { |
if (writeflag == MEM_READ) { |
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odata = (i << 24) + (i << 16) + (i << 8) + i; |
odata = (a << 24) + (a << 16) + (a << 8) + a; |
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} else { |
} else { |
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fatal("[ le: WRITE to ethernet addr (%08lx):", |
fatal("[ le: WRITE to ethernet addr (%08lx):", |
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(long)relative_addr); |
(long)relative_addr); |
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/* ROM (including the MAC address): */ |
/* ROM (including the MAC address): */ |
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net_generate_unique_mac(machine, &d->rom[0]); |
net_generate_unique_mac(machine, &d->rom[0]); |
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/* |
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* NOTE: According to the Lance documentation, the low order bit of |
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* a physical MAC address should be clear. However, NetBSD and |
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* Linux drop packets if the _first_ byte's lowest bit is not zero. |
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*/ |
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d->rom[0] &= ~1; |
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d->rom[5] &= ~1; |
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/* Copies of the MAC address and a test pattern: */ |
/* Copies of the MAC address and a test pattern: */ |
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d->rom[10] = d->rom[21] = d->rom[5]; |
d->rom[10] = d->rom[21] = d->rom[5]; |
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d->rom[11] = d->rom[20] = d->rom[4]; |
d->rom[11] = d->rom[20] = d->rom[4]; |
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memory_device_register(mem, "le_sram", baseaddr, |
memory_device_register(mem, "le_sram", baseaddr, |
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SRAM_SIZE, dev_le_sram_access, (void *)d, |
SRAM_SIZE, dev_le_sram_access, (void *)d, |
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MEM_DYNTRANS_OK | MEM_DYNTRANS_WRITE_OK |
DM_DYNTRANS_OK | DM_DYNTRANS_WRITE_OK |
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| MEM_READING_HAS_NO_SIDE_EFFECTS, d->sram); |
| DM_READS_HAVE_NO_SIDE_EFFECTS, d->sram); |
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name2 = malloc(nlen); |
name2 = malloc(nlen); |
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if (name2 == NULL) { |
if (name2 == NULL) { |
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d->rom[0], d->rom[1], d->rom[2], d->rom[3], d->rom[4], d->rom[5]); |
d->rom[0], d->rom[1], d->rom[2], d->rom[3], d->rom[4], d->rom[5]); |
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memory_device_register(mem, name2, baseaddr + 0x100000, |
memory_device_register(mem, name2, baseaddr + 0x100000, |
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len - 0x100000, dev_le_access, (void *)d, MEM_DEFAULT, NULL); |
len - 0x100000, dev_le_access, (void *)d, DM_DEFAULT, NULL); |
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machine_add_tickfunction(machine, dev_le_tick, d, LE_TICK_SHIFT); |
machine_add_tickfunction(machine, dev_le_tick, d, LE_TICK_SHIFT, 0.0); |
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net_add_nic(machine->emul->net, d, &d->rom[0]); |
net_add_nic(machine->emul->net, d, &d->rom[0]); |
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} |
} |