/[gxemul]/trunk/src/devices/dev_le.c
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revision 12 by dpavlin, Mon Oct 8 16:18:38 2007 UTC revision 34 by dpavlin, Mon Oct 8 16:21:17 2007 UTC
# Line 1  Line 1 
1  /*  /*
2   *  Copyright (C) 2003-2005  Anders Gavare.  All rights reserved.   *  Copyright (C) 2003-2007  Anders Gavare.  All rights reserved.
3   *   *
4   *  Redistribution and use in source and binary forms, with or without   *  Redistribution and use in source and binary forms, with or without
5   *  modification, are permitted provided that the following conditions are met:   *  modification, are permitted provided that the following conditions are met:
# Line 25  Line 25 
25   *  SUCH DAMAGE.   *  SUCH DAMAGE.
26   *     *  
27   *   *
28   *  $Id: dev_le.c,v 1.43 2005/07/27 06:57:34 debug Exp $   *  $Id: dev_le.c,v 1.54 2006/12/31 21:35:26 debug Exp $
29   *     *  
30   *  LANCE ethernet, as used in DECstations.   *  LANCE ethernet, as used in DECstations.
31   *   *
# Line 47  Line 47 
47   *   *
48   *  TODO:  Error conditions (such as when there are not enough receive   *  TODO:  Error conditions (such as when there are not enough receive
49   *         buffers) are not emulated yet.   *         buffers) are not emulated yet.
50     *
51     *         (Old bug, but probably still valid:  "UDP packets that are too
52     *         large are not handled well by the Lance device.")
53   */   */
54    
55  #include <stdio.h>  #include <stdio.h>
# Line 82  extern int quiet_mode; Line 85  extern int quiet_mode;
85    
86    
87  struct le_data {  struct le_data {
88          int             irq_nr;          struct interrupt irq;
89            int             irq_asserted;
90    
91          uint64_t        buf_start;          uint64_t        buf_start;
92          uint64_t        buf_end;          uint64_t        buf_end;
# Line 230  static void le_tx(struct net *net, struc Line 234  static void le_tx(struct net *net, struc
234  {  {
235          int start_txp = d->txp;          int start_txp = d->txp;
236          uint16_t tx_descr[4];          uint16_t tx_descr[4];
237          int stp, enp, i, cur_packet_offset;          int stp, enp, cur_packet_offset;
238            size_t i;
239          uint32_t bufaddr, buflen;          uint32_t bufaddr, buflen;
240    
241          /*  TODO: This is just a guess:  */          /*  TODO: This is just a guess:  */
# Line 349  static void le_tx(struct net *net, struc Line 354  static void le_tx(struct net *net, struc
354   */   */
355  static void le_rx(struct net *net, struct le_data *d)  static void le_rx(struct net *net, struct le_data *d)
356  {  {
357          int i, start_rxp = d->rxp;          int start_rxp = d->rxp;
358            size_t i;
359          uint16_t rx_descr[4];          uint16_t rx_descr[4];
360          uint32_t bufaddr, buflen;          uint32_t bufaddr, buflen;
361    
# Line 387  static void le_rx(struct net *net, struc Line 393  static void le_rx(struct net *net, struc
393    
394                  /*  Copy data from the packet into SRAM:  */                  /*  Copy data from the packet into SRAM:  */
395                  for (i=0; i<buflen; i++) {                  for (i=0; i<buflen; i++) {
396                          if (d->rx_packet_offset + i >= d->rx_packet_len)                          if (d->rx_packet_offset+(ssize_t)i >= d->rx_packet_len)
397                                  break;                                  break;
398                          d->sram[(bufaddr + i) & (SRAM_SIZE-1)] =                          d->sram[(bufaddr + i) & (SRAM_SIZE-1)] =
399                              d->rx_packet[d->rx_packet_offset + i];                              d->rx_packet[d->rx_packet_offset + i];
# Line 532  static void le_register_fix(struct net * Line 538  static void le_register_fix(struct net *
538  void dev_le_tick(struct cpu *cpu, void *extra)  void dev_le_tick(struct cpu *cpu, void *extra)
539  {  {
540          struct le_data *d = (struct le_data *) extra;          struct le_data *d = (struct le_data *) extra;
541            int new_assert;
542    
543          le_register_fix(cpu->machine->emul->net, d);          le_register_fix(cpu->machine->emul->net, d);
544    
545          if (d->reg[0] & LE_INTR && d->reg[0] & LE_INEA)          new_assert = (d->reg[0] & LE_INTR) && (d->reg[0] & LE_INEA);
546                  cpu_interrupt(cpu, d->irq_nr);          if (new_assert && !d->irq_asserted)
547          else                  INTERRUPT_ASSERT(d->irq);
548                  cpu_interrupt_ack(cpu, d->irq_nr);          if (d->irq_asserted && !new_assert)
549                    INTERRUPT_DEASSERT(d->irq);
550    
551            d->irq_asserted = new_assert;
552  }  }
553    
554    
# Line 599  void le_register_write(struct le_data *d Line 609  void le_register_write(struct le_data *d
609  }  }
610    
611    
612  /*  DEVICE_ACCESS(le_sram)
  *  dev_le_sram_access():  
  */  
 int dev_le_sram_access(struct cpu *cpu, struct memory *mem,  
         uint64_t relative_addr, unsigned char *data, size_t len,  
         int writeflag, void *extra)  
613  {  {
614          int i, retval;          size_t i;
615            int retval;
616          struct le_data *d = extra;          struct le_data *d = extra;
617    
618  #ifdef LE_DEBUG  #ifdef LE_DEBUG
# Line 648  int dev_le_sram_access(struct cpu *cpu, Line 654  int dev_le_sram_access(struct cpu *cpu,
654  }  }
655    
656    
657  /*  DEVICE_ACCESS(le)
  *  dev_le_access():  
  */  
 int dev_le_access(struct cpu *cpu, struct memory *mem, uint64_t relative_addr,  
         unsigned char *data, size_t len, int writeflag, void *extra)  
658  {  {
659          uint64_t idata = 0, odata = 0;          uint64_t idata = 0, odata = 0;
660          int i, retval = 1;          size_t i;
661            int retval = 1;
662          struct le_data *d = extra;          struct le_data *d = extra;
663    
664          idata = memory_readmax64(cpu, data, len);          if (writeflag == MEM_WRITE)
665                    idata = memory_readmax64(cpu, data, len);
666    
667  #ifdef LE_DEBUG  #ifdef LE_DEBUG
668          if (writeflag == MEM_WRITE) {          if (writeflag == MEM_WRITE) {
# Line 671  int dev_le_access(struct cpu *cpu, struc Line 675  int dev_le_access(struct cpu *cpu, struc
675    
676          /*  Read from station's ROM (ethernet address):  */          /*  Read from station's ROM (ethernet address):  */
677          if (relative_addr >= 0xc0000 && relative_addr <= 0xfffff) {          if (relative_addr >= 0xc0000 && relative_addr <= 0xfffff) {
678                  i = (relative_addr & 0xff) / 4;                  uint32_t a;
679                  i = d->rom[i & (ROM_SIZE-1)];                  int j = (relative_addr & 0xff) / 4;
680                    a = d->rom[j & (ROM_SIZE-1)];
681    
682                  if (writeflag == MEM_READ) {                  if (writeflag == MEM_READ) {
683                          odata = (i << 24) + (i << 16) + (i << 8) + i;                          odata = (a << 24) + (a << 16) + (a << 8) + a;
684                  } else {                  } else {
685                          fatal("[ le: WRITE to ethernet addr (%08lx):",                          fatal("[ le: WRITE to ethernet addr (%08lx):",
686                              (long)relative_addr);                              (long)relative_addr);
# Line 765  do_return: Line 770  do_return:
770   *  dev_le_init():   *  dev_le_init():
771   */   */
772  void dev_le_init(struct machine *machine, struct memory *mem, uint64_t baseaddr,  void dev_le_init(struct machine *machine, struct memory *mem, uint64_t baseaddr,
773          uint64_t buf_start, uint64_t buf_end, int irq_nr, int len)          uint64_t buf_start, uint64_t buf_end, char *irq_path, int len)
774  {  {
775          char *name2;          char *name2;
776          size_t nlen = 55;          size_t nlen = 55;
# Line 777  void dev_le_init(struct machine *machine Line 782  void dev_le_init(struct machine *machine
782          }          }
783    
784          memset(d, 0, sizeof(struct le_data));          memset(d, 0, sizeof(struct le_data));
785          d->irq_nr    = irq_nr;  
786            INTERRUPT_CONNECT(irq_path, d->irq);
787    
788          d->sram = malloc(SRAM_SIZE);          d->sram = malloc(SRAM_SIZE);
789          if (d->sram == NULL) {          if (d->sram == NULL) {
# Line 800  void dev_le_init(struct machine *machine Line 806  void dev_le_init(struct machine *machine
806          /*  ROM (including the MAC address):  */          /*  ROM (including the MAC address):  */
807          net_generate_unique_mac(machine, &d->rom[0]);          net_generate_unique_mac(machine, &d->rom[0]);
808    
         /*  
          *  NOTE:  According to the Lance documentation, the low order bit of  
          *  a physical MAC address should be clear.  However, NetBSD and  
          *  Linux drop packets if the _first_ byte's lowest bit is not zero.  
          */  
         d->rom[0] &= ~1;  
         d->rom[5] &= ~1;  
   
809          /*  Copies of the MAC address and a test pattern:  */          /*  Copies of the MAC address and a test pattern:  */
810          d->rom[10] = d->rom[21] = d->rom[5];          d->rom[10] = d->rom[21] = d->rom[5];
811          d->rom[11] = d->rom[20] = d->rom[4];          d->rom[11] = d->rom[20] = d->rom[4];
# Line 824  void dev_le_init(struct machine *machine Line 822  void dev_le_init(struct machine *machine
822    
823          memory_device_register(mem, "le_sram", baseaddr,          memory_device_register(mem, "le_sram", baseaddr,
824              SRAM_SIZE, dev_le_sram_access, (void *)d,              SRAM_SIZE, dev_le_sram_access, (void *)d,
825              MEM_DYNTRANS_OK | MEM_DYNTRANS_WRITE_OK              DM_DYNTRANS_OK | DM_DYNTRANS_WRITE_OK
826              | MEM_READING_HAS_NO_SIDE_EFFECTS, d->sram);              | DM_READS_HAVE_NO_SIDE_EFFECTS, d->sram);
827    
828          name2 = malloc(nlen);          name2 = malloc(nlen);
829          if (name2 == NULL) {          if (name2 == NULL) {
# Line 836  void dev_le_init(struct machine *machine Line 834  void dev_le_init(struct machine *machine
834              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]);
835    
836          memory_device_register(mem, name2, baseaddr + 0x100000,          memory_device_register(mem, name2, baseaddr + 0x100000,
837              len - 0x100000, dev_le_access, (void *)d, MEM_DEFAULT, NULL);              len - 0x100000, dev_le_access, (void *)d, DM_DEFAULT, NULL);
838    
839          machine_add_tickfunction(machine, dev_le_tick, d, LE_TICK_SHIFT);          machine_add_tickfunction(machine, dev_le_tick, d, LE_TICK_SHIFT, 0.0);
840    
841          net_add_nic(machine->emul->net, d, &d->rom[0]);          net_add_nic(machine->emul->net, d, &d->rom[0]);
842  }  }
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