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[/] [openrisc/] [trunk/] [or1ksim/] [peripheral/] [eth.c] - Rev 282
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/* ethernet.c -- Simulation of Ethernet MAC Copyright (C) 2001 by Erez Volk, erez@opencores.org Ivan Guzvinec, ivang@opencores.org Copyright (C) 2008 Embecosm Limited Contributor Jeremy Bennett <jeremy.bennett@embecosm.com> This file is part of Or1ksim, the OpenRISC 1000 Architectural Simulator. 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 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ /* This program is commented throughout in a fashion suitable for processing with Doxygen. */ /* Autoconf and/or portability configuration */ #include "config.h" #include "port.h" /* System includes */ #include <stdlib.h> #include <stdio.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <sys/poll.h> #include <sys/time.h> #include <unistd.h> #include <errno.h> #include <netinet/in.h> #include <sys/ioctl.h> #include <sys/socket.h> #include <net/if.h> /* Package includes */ #include "arch.h" #include "config.h" #include "abstract.h" #include "eth.h" #include "dma.h" #include "sim-config.h" #include "fields.h" #include "crc32.h" #include "vapi.h" #include "pic.h" #include "sched.h" #include "toplevel-support.h" #include "sim-cmd.h" struct eth_device { /* Is peripheral enabled */ int enabled; /* Base address in memory */ oraddr_t baseaddr; /* Which DMA controller is this MAC connected to */ unsigned dma; unsigned tx_channel; unsigned rx_channel; /* Our address */ unsigned char mac_address[ETHER_ADDR_LEN]; /* interrupt line */ unsigned long mac_int; /* VAPI ID */ unsigned long base_vapi_id; /* RX and TX file names and handles */ char *rxfile, *txfile; int txfd; int rxfd; off_t loopback_offset; /* Socket interface name */ char *sockif; int rtx_sock; int rtx_type; struct ifreq ifr; fd_set rfds, wfds; /* Current TX state */ struct { unsigned long state; unsigned long bd_index; unsigned long bd; unsigned long bd_addr; unsigned working, waiting_for_dma, error; long packet_length; unsigned minimum_length, maximum_length; unsigned add_crc; unsigned crc_dly; unsigned long crc_value; long bytes_left, bytes_sent; } tx; /* Current RX state */ struct { unsigned long state; unsigned long bd_index; unsigned long bd; unsigned long bd_addr; int fd; off_t *offset; unsigned working, error, waiting_for_dma; long packet_length, bytes_read, bytes_left; } rx; /* Visible registers */ struct { unsigned long moder; unsigned long int_source; unsigned long int_mask; unsigned long ipgt; unsigned long ipgr1; unsigned long ipgr2; unsigned long packetlen; unsigned long collconf; unsigned long tx_bd_num; unsigned long controlmoder; unsigned long miimoder; unsigned long miicommand; unsigned long miiaddress; unsigned long miitx_data; unsigned long miirx_data; unsigned long miistatus; unsigned long hash0; unsigned long hash1; /* Buffer descriptors */ unsigned long bd_ram[ETH_BD_SPACE / 4]; } regs; unsigned char rx_buff[ETH_MAXPL]; unsigned char tx_buff[ETH_MAXPL]; unsigned char lo_buff[ETH_MAXPL]; }; /* simulator interface */ static void eth_vapi_read (unsigned long id, unsigned long data, void *dat); /* register interface */ static void eth_write32 (oraddr_t addr, uint32_t value, void *dat); static uint32_t eth_read32 (oraddr_t addr, void *dat); /* clock */ static void eth_controller_tx_clock (void *); static void eth_controller_rx_clock (void *); /* utility functions */ static ssize_t eth_read_rx_file (struct eth_device *, void *, size_t); static void eth_skip_rx_file (struct eth_device *, off_t); static void eth_rx_next_packet (struct eth_device *); static void eth_write_tx_bd_num (struct eth_device *, unsigned long value); /* ========================================================================= */ /* TX LOGIC */ /*---------------------------------------------------------------------------*/ /* * TX clock * Responsible for starting and finishing TX */ static void eth_controller_tx_clock (void *dat) { struct eth_device *eth = dat; int bAdvance = 1; #if HAVE_ETH_PHY struct sockaddr_ll sll; #endif /* HAVE_ETH_PHY */ long nwritten = 0; unsigned long read_word; switch (eth->tx.state) { case ETH_TXSTATE_IDLE: eth->tx.state = ETH_TXSTATE_WAIT4BD; break; case ETH_TXSTATE_WAIT4BD: /* Read buffer descriptor */ eth->tx.bd = eth->regs.bd_ram[eth->tx.bd_index]; eth->tx.bd_addr = eth->regs.bd_ram[eth->tx.bd_index + 1]; if (TEST_FLAG (eth->tx.bd, ETH_TX_BD, READY)) { /*****************/ /* initialize TX */ eth->tx.bytes_left = eth->tx.packet_length = GET_FIELD (eth->tx.bd, ETH_TX_BD, LENGTH); eth->tx.bytes_sent = 0; /* Initialize error status bits */ CLEAR_FLAG (eth->tx.bd, ETH_TX_BD, DEFER); CLEAR_FLAG (eth->tx.bd, ETH_TX_BD, COLLISION); CLEAR_FLAG (eth->tx.bd, ETH_TX_BD, RETRANSMIT); CLEAR_FLAG (eth->tx.bd, ETH_TX_BD, UNDERRUN); CLEAR_FLAG (eth->tx.bd, ETH_TX_BD, NO_CARRIER); SET_FIELD (eth->tx.bd, ETH_TX_BD, RETRY, 0); /* Find out minimum length */ if (TEST_FLAG (eth->tx.bd, ETH_TX_BD, PAD) || TEST_FLAG (eth->regs.moder, ETH_MODER, PAD)) eth->tx.minimum_length = GET_FIELD (eth->regs.packetlen, ETH_PACKETLEN, MINFL); else eth->tx.minimum_length = eth->tx.packet_length; /* Find out maximum length */ if (TEST_FLAG (eth->regs.moder, ETH_MODER, HUGEN)) eth->tx.maximum_length = eth->tx.packet_length; else eth->tx.maximum_length = GET_FIELD (eth->regs.packetlen, ETH_PACKETLEN, MAXFL); /* Do we need CRC on this packet? */ if (TEST_FLAG (eth->regs.moder, ETH_MODER, CRCEN) || (TEST_FLAG (eth->tx.bd, ETH_TX_BD, CRC) && TEST_FLAG (eth->tx.bd, ETH_TX_BD, LAST))) eth->tx.add_crc = 1; else eth->tx.add_crc = 0; if (TEST_FLAG (eth->regs.moder, ETH_MODER, DLYCRCEN)) eth->tx.crc_dly = 1; else eth->tx.crc_dly = 0; /* XXX - For now we skip CRC calculation */ if (eth->rtx_type == ETH_RTX_FILE) { /* write packet length to file */ nwritten = write (eth->txfd, &(eth->tx.packet_length), sizeof (eth->tx.packet_length)); } /************************************************/ /* start transmit with reading packet into FIFO */ eth->tx.state = ETH_TXSTATE_READFIFO; } /* stay in this state if (TXEN && !READY) */ break; case ETH_TXSTATE_READFIFO: #if 1 if (eth->tx.bytes_sent < eth->tx.packet_length) { read_word = eval_direct32 (eth->tx.bytes_sent + eth->tx.bd_addr, 0, 0); eth->tx_buff[eth->tx.bytes_sent] = (unsigned char) (read_word >> 24); eth->tx_buff[eth->tx.bytes_sent + 1] = (unsigned char) (read_word >> 16); eth->tx_buff[eth->tx.bytes_sent + 2] = (unsigned char) (read_word >> 8); eth->tx_buff[eth->tx.bytes_sent + 3] = (unsigned char) (read_word); eth->tx.bytes_sent += 4; } #else if (eth->tx.bytes_sent < eth->tx.packet_length) { eth->tx_buff[eth->tx.bytes_sent] = eval_direct8 (eth->tx.bytes_sent + eth->tx.bd_addr, 0, 0); eth->tx.bytes_sent += 1; } #endif else { eth->tx.state = ETH_TXSTATE_TRANSMIT; } break; case ETH_TXSTATE_TRANSMIT: /* send packet */ switch (eth->rtx_type) { case ETH_RTX_FILE: nwritten = write (eth->txfd, eth->tx_buff, eth->tx.packet_length); break; #if HAVE_ETH_PHY case ETH_RTX_SOCK: memset (&sll, 0, sizeof (sll)); sll.sll_ifindex = eth->ifr.ifr_ifindex; nwritten = sendto (eth->rtx_sock, eth->tx_buff, eth->tx.packet_length, 0, (struct sockaddr *) &sll, sizeof (sll)); #endif /* HAVE_ETH_PHY */ } /* set BD status */ if (nwritten == eth->tx.packet_length) { CLEAR_FLAG (eth->tx.bd, ETH_TX_BD, READY); SET_FLAG (eth->regs.int_source, ETH_INT_SOURCE, TXB); eth->tx.state = ETH_TXSTATE_WAIT4BD; } else { /* XXX - implement retry mechanism here! */ CLEAR_FLAG (eth->tx.bd, ETH_TX_BD, READY); CLEAR_FLAG (eth->tx.bd, ETH_TX_BD, COLLISION); SET_FLAG (eth->regs.int_source, ETH_INT_SOURCE, TXE); eth->tx.state = ETH_TXSTATE_WAIT4BD; } eth->regs.bd_ram[eth->tx.bd_index] = eth->tx.bd; /* generate OK interrupt */ if (TEST_FLAG (eth->regs.int_mask, ETH_INT_MASK, TXE_M) || TEST_FLAG (eth->regs.int_mask, ETH_INT_MASK, TXB_M)) { if (TEST_FLAG (eth->tx.bd, ETH_TX_BD, IRQ)) report_interrupt (eth->mac_int); } /* advance to next BD */ if (bAdvance) { if (TEST_FLAG (eth->tx.bd, ETH_TX_BD, WRAP) || eth->tx.bd_index >= ETH_BD_COUNT) eth->tx.bd_index = 0; else eth->tx.bd_index += 2; } break; } /* Reschedule */ SCHED_ADD (eth_controller_tx_clock, dat, 1); } /* ========================================================================= */ /* ========================================================================= */ /* RX LOGIC */ /*---------------------------------------------------------------------------*/ /* * RX clock * Responsible for starting and finishing RX */ static void eth_controller_rx_clock (void *dat) { struct eth_device *eth = dat; long nread; unsigned long send_word; switch (eth->rx.state) { case ETH_RXSTATE_IDLE: eth->rx.state = ETH_RXSTATE_WAIT4BD; break; case ETH_RXSTATE_WAIT4BD: eth->rx.bd = eth->regs.bd_ram[eth->rx.bd_index]; eth->rx.bd_addr = eth->regs.bd_ram[eth->rx.bd_index + 1]; if (TEST_FLAG (eth->rx.bd, ETH_RX_BD, READY)) { /*****************/ /* Initialize RX */ CLEAR_FLAG (eth->rx.bd, ETH_RX_BD, MISS); CLEAR_FLAG (eth->rx.bd, ETH_RX_BD, INVALID); CLEAR_FLAG (eth->rx.bd, ETH_RX_BD, DRIBBLE); CLEAR_FLAG (eth->rx.bd, ETH_RX_BD, UVERRUN); CLEAR_FLAG (eth->rx.bd, ETH_RX_BD, COLLISION); CLEAR_FLAG (eth->rx.bd, ETH_RX_BD, TOOBIG); CLEAR_FLAG (eth->rx.bd, ETH_RX_BD, TOOSHORT); /* Setup file to read from */ if (TEST_FLAG (eth->regs.moder, ETH_MODER, LOOPBCK)) { eth->rx.fd = eth->txfd; eth->rx.offset = &(eth->loopback_offset); } else { eth->rx.fd = eth->rxfd; eth->rx.offset = 0; } eth->rx.state = ETH_RXSTATE_RECV; } else if (!TEST_FLAG (eth->regs.moder, ETH_MODER, RXEN)) { eth->rx.state = ETH_RXSTATE_IDLE; } else { nread = recv (eth->rtx_sock, eth->rx_buff, ETH_MAXPL, /*MSG_PEEK | */ MSG_DONTWAIT); if (nread > 0) { SET_FLAG (eth->regs.int_source, ETH_INT_SOURCE, BUSY); if (TEST_FLAG (eth->regs.int_mask, ETH_INT_MASK, BUSY_M)) report_interrupt (eth->mac_int); } } break; case ETH_RXSTATE_RECV: switch (eth->rtx_type) { case ETH_RTX_FILE: /* Read packet length */ if (eth_read_rx_file (eth, &(eth->rx.packet_length), sizeof (eth->rx.packet_length)) < sizeof (eth->rx.packet_length)) { /* TODO: just do what real ethernet would do (some kind of error state) */ sim_done (); break; } /* Packet must be big enough to hold a header */ if (eth->rx.packet_length < ETHER_HDR_LEN) { eth_rx_next_packet (eth); eth->rx.state = ETH_RXSTATE_WAIT4BD; break; } eth->rx.bytes_read = 0; eth->rx.bytes_left = eth->rx.packet_length; /* for now Read entire packet into memory */ nread = eth_read_rx_file (eth, eth->rx_buff, eth->rx.bytes_left); if (nread < eth->rx.bytes_left) { eth->rx.error = 1; break; } eth->rx.packet_length = nread; eth->rx.bytes_left = nread; eth->rx.bytes_read = 0; eth->rx.state = ETH_RXSTATE_WRITEFIFO; break; case ETH_RTX_SOCK: nread = recv (eth->rtx_sock, eth->rx_buff, ETH_MAXPL, MSG_DONTWAIT); if (nread == 0) { break; } else if (nread < 0) { if (errno != EAGAIN) { break; } else break; } /* If not promiscouos mode, check the destination address */ if (!TEST_FLAG (eth->regs.moder, ETH_MODER, PRO)) { if (TEST_FLAG (eth->regs.moder, ETH_MODER, IAM) && (eth->rx_buff[0] & 1)) { /* Nothing for now */ } if (eth->mac_address[5] != eth->rx_buff[0] || eth->mac_address[4] != eth->rx_buff[1] || eth->mac_address[3] != eth->rx_buff[2] || eth->mac_address[2] != eth->rx_buff[3] || eth->mac_address[1] != eth->rx_buff[4] || eth->mac_address[0] != eth->rx_buff[5]) break; } eth->rx.packet_length = nread; eth->rx.bytes_left = nread; eth->rx.bytes_read = 0; eth->rx.state = ETH_RXSTATE_WRITEFIFO; break; case ETH_RTX_VAPI: break; } break; case ETH_RXSTATE_WRITEFIFO: #if 1 send_word = ((unsigned long) eth->rx_buff[eth->rx.bytes_read] << 24) | ((unsigned long) eth->rx_buff[eth->rx.bytes_read + 1] << 16) | ((unsigned long) eth->rx_buff[eth->rx.bytes_read + 2] << 8) | ((unsigned long) eth->rx_buff[eth->rx.bytes_read + 3]); set_direct32 (eth->rx.bd_addr + eth->rx.bytes_read, send_word, 0, 0); /* update counters */ eth->rx.bytes_left -= 4; eth->rx.bytes_read += 4; #else set_direct8 (eth->rx.bd_addr + eth->rx.bytes_read, eth->rx_buff[eth->rx.bytes_read], 0, 0); eth->rx.bytes_left -= 1; eth->rx.bytes_read += 1; #endif if (eth->rx.bytes_left <= 0) { /* Write result to bd */ SET_FIELD (eth->rx.bd, ETH_RX_BD, LENGTH, eth->rx.packet_length); CLEAR_FLAG (eth->rx.bd, ETH_RX_BD, READY); SET_FLAG (eth->regs.int_source, ETH_INT_SOURCE, RXB); if (eth->rx.packet_length < (GET_FIELD (eth->regs.packetlen, ETH_PACKETLEN, MINFL) - 4)) SET_FLAG (eth->rx.bd, ETH_RX_BD, TOOSHORT); if (eth->rx.packet_length > GET_FIELD (eth->regs.packetlen, ETH_PACKETLEN, MAXFL)) SET_FLAG (eth->rx.bd, ETH_RX_BD, TOOBIG); eth->regs.bd_ram[eth->rx.bd_index] = eth->rx.bd; /* advance to next BD */ if (TEST_FLAG (eth->rx.bd, ETH_RX_BD, WRAP) || eth->rx.bd_index >= ETH_BD_COUNT) eth->rx.bd_index = eth->regs.tx_bd_num << 1; else eth->rx.bd_index += 2; if ((TEST_FLAG (eth->regs.int_mask, ETH_INT_MASK, RXB_M)) && (TEST_FLAG (eth->rx.bd, ETH_RX_BD, IRQ))) { report_interrupt (eth->mac_int); } /* ready to receive next packet */ eth->rx.state = ETH_RXSTATE_IDLE; } break; } /* Reschedule */ SCHED_ADD (eth_controller_rx_clock, dat, 1); } /* ========================================================================= */ /* Move to next RX BD */ static void eth_rx_next_packet (struct eth_device *eth) { /* Skip any possible leftovers */ if (eth->rx.bytes_left) eth_skip_rx_file (eth, eth->rx.bytes_left); } /* "Skip" bytes in RX file */ static void eth_skip_rx_file (struct eth_device *eth, off_t count) { eth->rx.offset += count; } /* * Utility function to read from the ethernet RX file * This function moves the file pointer to the current place in the packet before reading */ static ssize_t eth_read_rx_file (struct eth_device *eth, void *buf, size_t count) { ssize_t result; if (eth->rx.fd <= 0) { return 0; } if (eth->rx.offset) if (lseek (eth->rx.fd, *(eth->rx.offset), SEEK_SET) == (off_t) - 1) { return 0; } result = read (eth->rx.fd, buf, count); if (eth->rx.offset && result >= 0) *(eth->rx.offset) += result; return result; } /* ========================================================================= */ /* Reset. Initializes all registers to default and places devices in memory address space. */ static void eth_reset (void *dat) { struct eth_device *eth = dat; #if HAVE_ETH_PHY int j; struct sockaddr_ll sll; #endif /* HAVE_ETH_PHY */ if (eth->baseaddr != 0) { switch (eth->rtx_type) { case ETH_RTX_FILE: /* (Re-)open TX/RX files */ if (eth->rxfd > 0) close (eth->rxfd); if (eth->txfd > 0) close (eth->txfd); eth->rxfd = eth->txfd = -1; if ((eth->rxfd = open (eth->rxfile, O_RDONLY)) < 0) fprintf (stderr, "Cannot open Ethernet RX file \"%s\"\n", eth->rxfile); if ((eth->txfd = open (eth->txfile, O_RDWR | O_CREAT | O_APPEND #if defined(O_SYNC) /* BSD / Mac OS X manual doesn't know about O_SYNC */ | O_SYNC #endif , S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)) < 0) fprintf (stderr, "Cannot open Ethernet TX file \"%s\"\n", eth->txfile); eth->loopback_offset = lseek (eth->txfd, 0, SEEK_END); break; #if HAVE_ETH_PHY case ETH_RTX_SOCK: /* (Re-)open TX/RX sockets */ if (eth->rtx_sock != 0) break; eth->rtx_sock = socket (PF_PACKET, SOCK_RAW, htons (ETH_P_ALL)); if (eth->rtx_sock == -1) { fprintf (stderr, "Cannot open rtx_sock.\n"); return; } /* get interface index number */ memset (&(eth->ifr), 0, sizeof (eth->ifr)); strncpy (eth->ifr.ifr_name, eth->sockif, IFNAMSIZ); if (ioctl (eth->rtx_sock, SIOCGIFINDEX, &(eth->ifr)) == -1) { fprintf (stderr, "SIOCGIFINDEX failed!\n"); return; } /* Bind to interface... */ memset (&sll, 0xff, sizeof (sll)); sll.sll_family = AF_PACKET; /* allways AF_PACKET */ sll.sll_protocol = htons (ETH_P_ALL); sll.sll_ifindex = eth->ifr.ifr_ifindex; if (bind (eth->rtx_sock, (struct sockaddr *) &sll, sizeof (sll)) == -1) { fprintf (stderr, "Error bind().\n"); return; } /* first, flush all received packets. */ do { fd_set fds; struct timeval t; FD_ZERO (&fds); FD_SET (eth->rtx_sock, &fds); memset (&t, 0, sizeof (t)); j = select (FD_SETSIZE, &fds, NULL, NULL, &t); if (j > 0) recv (eth->rtx_sock, eth->rx_buff, j, 0); } while (j); break; #else /* HAVE_ETH_PHY */ case ETH_RTX_SOCK: fprintf (stderr, "Ethernet phy not enabled in this configuration. Configure with --enable-ethphy.\n"); exit (1); break; #endif /* HAVE_ETH_PHY */ } /* Set registers to default values */ memset (&(eth->regs), 0, sizeof (eth->regs)); eth->regs.moder = 0x0000A000; eth->regs.ipgt = 0x00000012; eth->regs.ipgr1 = 0x0000000C; eth->regs.ipgr2 = 0x00000012; eth->regs.packetlen = 0x003C0600; eth->regs.collconf = 0x000F003F; eth->regs.miimoder = 0x00000064; eth->regs.tx_bd_num = 0x00000040; /* Initialize TX/RX status */ memset (&(eth->tx), 0, sizeof (eth->tx)); memset (&(eth->rx), 0, sizeof (eth->rx)); eth->rx.bd_index = eth->regs.tx_bd_num << 1; /* Initialize VAPI */ if (eth->base_vapi_id) { vapi_install_multi_handler (eth->base_vapi_id, ETH_NUM_VAPI_IDS, eth_vapi_read, dat); } } } /* ========================================================================= */ /* Print register values on stdout */ static void eth_status (void *dat) { struct eth_device *eth = dat; PRINTF ("\nEthernet MAC at 0x%" PRIxADDR ":\n", eth->baseaddr); PRINTF ("MODER : 0x%08lX\n", eth->regs.moder); PRINTF ("INT_SOURCE : 0x%08lX\n", eth->regs.int_source); PRINTF ("INT_MASK : 0x%08lX\n", eth->regs.int_mask); PRINTF ("IPGT : 0x%08lX\n", eth->regs.ipgt); PRINTF ("IPGR1 : 0x%08lX\n", eth->regs.ipgr1); PRINTF ("IPGR2 : 0x%08lX\n", eth->regs.ipgr2); PRINTF ("PACKETLEN : 0x%08lX\n", eth->regs.packetlen); PRINTF ("COLLCONF : 0x%08lX\n", eth->regs.collconf); PRINTF ("TX_BD_NUM : 0x%08lX\n", eth->regs.tx_bd_num); PRINTF ("CTRLMODER : 0x%08lX\n", eth->regs.controlmoder); PRINTF ("MIIMODER : 0x%08lX\n", eth->regs.miimoder); PRINTF ("MIICOMMAND : 0x%08lX\n", eth->regs.miicommand); PRINTF ("MIIADDRESS : 0x%08lX\n", eth->regs.miiaddress); PRINTF ("MIITX_DATA : 0x%08lX\n", eth->regs.miitx_data); PRINTF ("MIIRX_DATA : 0x%08lX\n", eth->regs.miirx_data); PRINTF ("MIISTATUS : 0x%08lX\n", eth->regs.miistatus); PRINTF ("MAC Address : %02X:%02X:%02X:%02X:%02X:%02X\n", eth->mac_address[0], eth->mac_address[1], eth->mac_address[2], eth->mac_address[3], eth->mac_address[4], eth->mac_address[5]); PRINTF ("HASH0 : 0x%08lX\n", eth->regs.hash0); PRINTF ("HASH1 : 0x%08lX\n", eth->regs.hash1); } /* ========================================================================= */ /* Read a register */ static uint32_t eth_read32 (oraddr_t addr, void *dat) { struct eth_device *eth = dat; switch (addr) { case ETH_MODER: return eth->regs.moder; case ETH_INT_SOURCE: return eth->regs.int_source; case ETH_INT_MASK: return eth->regs.int_mask; case ETH_IPGT: return eth->regs.ipgt; case ETH_IPGR1: return eth->regs.ipgr1; case ETH_IPGR2: return eth->regs.ipgr2; case ETH_PACKETLEN: return eth->regs.packetlen; case ETH_COLLCONF: return eth->regs.collconf; case ETH_TX_BD_NUM: return eth->regs.tx_bd_num; case ETH_CTRLMODER: return eth->regs.controlmoder; case ETH_MIIMODER: return eth->regs.miimoder; case ETH_MIICOMMAND: return eth->regs.miicommand; case ETH_MIIADDRESS: return eth->regs.miiaddress; case ETH_MIITX_DATA: return eth->regs.miitx_data; case ETH_MIIRX_DATA: return eth->regs.miirx_data; case ETH_MIISTATUS: return eth->regs.miistatus; case ETH_MAC_ADDR0: return (((unsigned long) eth->mac_address[3]) << 24) | (((unsigned long) eth->mac_address[2]) << 16) | (((unsigned long) eth->mac_address[1]) << 8) | (unsigned long) eth->mac_address[0]; case ETH_MAC_ADDR1: return (((unsigned long) eth->mac_address[5]) << 8) | (unsigned long) eth->mac_address[4]; case ETH_HASH0: return eth->regs.hash0; case ETH_HASH1: return eth->regs.hash1; /*case ETH_DMA_RX_TX: return eth_rx( eth ); */ } if ((addr >= ETH_BD_BASE) && (addr < ETH_BD_BASE + ETH_BD_SPACE)) return eth->regs.bd_ram[(addr - ETH_BD_BASE) / 4]; PRINTF ("eth_read32( 0x%" PRIxADDR " ): Illegal address\n", addr + eth->baseaddr); return 0; } /* ========================================================================= */ /* Write a register */ static void eth_write32 (oraddr_t addr, uint32_t value, void *dat) { struct eth_device *eth = dat; switch (addr) { case ETH_MODER: if (!TEST_FLAG (eth->regs.moder, ETH_MODER, RXEN) && TEST_FLAG (value, ETH_MODER, RXEN)) SCHED_ADD (eth_controller_rx_clock, dat, 1); else if (!TEST_FLAG (value, ETH_MODER, RXEN)) SCHED_FIND_REMOVE (eth_controller_rx_clock, dat); if (!TEST_FLAG (eth->regs.moder, ETH_MODER, TXEN) && TEST_FLAG (value, ETH_MODER, TXEN)) SCHED_ADD (eth_controller_tx_clock, dat, 1); else if (!TEST_FLAG (value, ETH_MODER, TXEN)) SCHED_FIND_REMOVE (eth_controller_tx_clock, dat); eth->regs.moder = value; if (TEST_FLAG (value, ETH_MODER, RST)) eth_reset (dat); return; case ETH_INT_SOURCE: if (!(eth->regs.int_source & ~value) && eth->regs.int_source) clear_interrupt (eth->mac_int); eth->regs.int_source &= ~value; return; case ETH_INT_MASK: eth->regs.int_mask = value; return; case ETH_IPGT: eth->regs.ipgt = value; return; case ETH_IPGR1: eth->regs.ipgr1 = value; return; case ETH_IPGR2: eth->regs.ipgr2 = value; return; case ETH_PACKETLEN: eth->regs.packetlen = value; return; case ETH_COLLCONF: eth->regs.collconf = value; return; case ETH_TX_BD_NUM: eth_write_tx_bd_num (eth, value); return; case ETH_CTRLMODER: eth->regs.controlmoder = value; return; case ETH_MIIMODER: eth->regs.miimoder = value; return; case ETH_MIICOMMAND: eth->regs.miicommand = value; return; case ETH_MIIADDRESS: eth->regs.miiaddress = value; return; case ETH_MIITX_DATA: eth->regs.miitx_data = value; return; case ETH_MIIRX_DATA: eth->regs.miirx_data = value; return; case ETH_MIISTATUS: eth->regs.miistatus = value; return; case ETH_MAC_ADDR0: eth->mac_address[0] = value & 0xFF; eth->mac_address[1] = (value >> 8) & 0xFF; eth->mac_address[2] = (value >> 16) & 0xFF; eth->mac_address[3] = (value >> 24) & 0xFF; return; case ETH_MAC_ADDR1: eth->mac_address[4] = value & 0xFF; eth->mac_address[5] = (value >> 8) & 0xFF; return; case ETH_HASH0: eth->regs.hash0 = value; return; case ETH_HASH1: eth->regs.hash1 = value; return; /*case ETH_DMA_RX_TX: eth_tx( eth, value ); return; */ } if ((addr >= ETH_BD_BASE) && (addr < ETH_BD_BASE + ETH_BD_SPACE)) { eth->regs.bd_ram[(addr - ETH_BD_BASE) / 4] = value; return; } PRINTF ("eth_write32( 0x%" PRIxADDR " ): Illegal address\n", addr + eth->baseaddr); return; } /* ========================================================================= */ /* * VAPI connection to outside */ static void eth_vapi_read (unsigned long id, unsigned long data, void *dat) { unsigned long which; struct eth_device *eth = dat; which = id - eth->base_vapi_id; if (!eth) { return; } switch (which) { case ETH_VAPI_DATA: break; case ETH_VAPI_CTRL: break; } } /* ========================================================================= */ /* When TX_BD_NUM is written, also reset current RX BD index */ static void eth_write_tx_bd_num (struct eth_device *eth, unsigned long value) { eth->regs.tx_bd_num = value & 0xFF; eth->rx.bd_index = eth->regs.tx_bd_num << 1; } /* ========================================================================= */ /*-----------------------------------------------[ Ethernet configuration ]---*/ /*---------------------------------------------------------------------------*/ /*!Enable or disable the Ethernet interface @param[in] val The value to use @param[in] dat The config data structure */ /*---------------------------------------------------------------------------*/ static void eth_enabled (union param_val val, void *dat) { struct eth_device *eth = dat; eth->enabled = val.int_val; } /* eth_enabled() */ /*---------------------------------------------------------------------------*/ /*!Set the Ethernet interface base address @param[in] val The value to use @param[in] dat The config data structure */ /*---------------------------------------------------------------------------*/ static void eth_baseaddr (union param_val val, void *dat) { struct eth_device *eth = dat; eth->baseaddr = val.addr_val; } /* eth_baseaddr() */ /*---------------------------------------------------------------------------*/ /*!Set the Ethernet DMA port This is not currently supported, so a warning message is printed. @param[in] val The value to use @param[in] dat The config data structure */ /*---------------------------------------------------------------------------*/ static void eth_dma (union param_val val, void *dat) { struct eth_device *eth = dat; fprintf (stderr, "Warning: External Ethernet DMA not currently supported\n"); eth->dma = val.addr_val; } /* eth_dma() */ /*---------------------------------------------------------------------------*/ /*!Set the Ethernet IRQ @param[in] val The value to use @param[in] dat The config data structure */ /*---------------------------------------------------------------------------*/ static void eth_irq (union param_val val, void *dat) { struct eth_device *eth = dat; eth->mac_int = val.int_val; } /* eth_irq() */ /*---------------------------------------------------------------------------*/ /*!Set the Ethernet interface type Currently two types are supported, file and socket. Use of the socket requires a compile time option. @param[in] val The value to use. 0 for file, 1 for socket. @param[in] dat The config data structure */ /*---------------------------------------------------------------------------*/ static void eth_rtx_type (union param_val val, void *dat) { struct eth_device *eth = dat; if (val.int_val) { #ifndef HAVE_ETH_PHY fprintf (stderr, "Warning: Ethernet PHY socket not enabled in this " "configuration (configure with --enable-ethphy): ignored\n"); return; #endif } eth->rtx_type = val.int_val; } /* eth_rtx_type() */ /*---------------------------------------------------------------------------*/ /*!Set the Ethernet DMA Rx channel External DMA is not currently supported, so a warning message is printed. @param[in] val The value to use @param[in] dat The config data structure */ /*---------------------------------------------------------------------------*/ static void eth_rx_channel (union param_val val, void *dat) { struct eth_device *eth = dat; fprintf (stderr, "Warning: External Ethernet DMA not currently supported: " "Rx channel ignored\n"); eth->rx_channel = val.int_val; } /* eth_rx_channel() */ /*---------------------------------------------------------------------------*/ /*!Set the Ethernet DMA Tx channel External DMA is not currently supported, so a warning message is printed. @param[in] val The value to use @param[in] dat The config data structure */ /*---------------------------------------------------------------------------*/ static void eth_tx_channel (union param_val val, void *dat) { struct eth_device *eth = dat; fprintf (stderr, "Warning: External Ethernet DMA not currently supported: " "Tx channel ignored\n"); eth->tx_channel = val.int_val; } /* eth_tx_channel() */ /*---------------------------------------------------------------------------*/ /*!Set the Ethernet DMA Rx file Free any previously allocated value. @param[in] val The value to use @param[in] dat The config data structure */ /*---------------------------------------------------------------------------*/ static void eth_rxfile (union param_val val, void *dat) { struct eth_device *eth = dat; if (NULL != eth->rxfile) { free (eth->rxfile); eth->rxfile = NULL; } if (!(eth->rxfile = strdup (val.str_val))) { fprintf (stderr, "Peripheral Ethernet: Run out of memory\n"); exit (-1); } } /* eth_rxfile() */ /*---------------------------------------------------------------------------*/ /*!Set the Ethernet DMA Tx file Free any previously allocated value. @param[in] val The value to use @param[in] dat The config data structure */ /*---------------------------------------------------------------------------*/ static void eth_txfile (union param_val val, void *dat) { struct eth_device *eth = dat; if (NULL != eth->txfile) { free (eth->txfile); eth->txfile = NULL; } if (!(eth->txfile = strdup (val.str_val))) { fprintf (stderr, "Peripheral Ethernet: Run out of memory\n"); exit (-1); } } /* eth_txfile() */ /*---------------------------------------------------------------------------*/ /*!Set the Ethernet socket interface Free any previously allocated value. This is only meaningful if the socket interface is configured. @param[in] val The value to use @param[in] dat The config data structure */ /*---------------------------------------------------------------------------*/ static void eth_sockif (union param_val val, void *dat) { struct eth_device *eth = dat; #ifndef HAVE_ETH_PHY fprintf (stderr, "Warning: Ethernet PHY socket not enabled in this " "configuration (configure with --enable-ethphy): " "sockif ignored\n"); return; #endif if (NULL != eth->sockif) { free (eth->sockif); eth->sockif = NULL; } if (!(eth->sockif = strdup (val.str_val))) { fprintf (stderr, "Peripheral Ethernet: Run out of memory\n"); exit (-1); } } /* eth_sockif() */ static void eth_vapi_id (union param_val val, void *dat) { struct eth_device *eth = dat; eth->base_vapi_id = val.int_val; } /*---------------------------------------------------------------------------*/ /*!Initialize a new Ethernet configuration ALL parameters are set explicitly to default values. */ /*---------------------------------------------------------------------------*/ static void * eth_sec_start (void) { struct eth_device *new = malloc (sizeof (struct eth_device)); if (!new) { fprintf (stderr, "Peripheral Eth: Run out of memory\n"); exit (-1); } memset (new, 0, sizeof (struct eth_device)); new->enabled = 1; new->baseaddr = 0; new->dma = 0; new->mac_int = 0; new->rtx_type = 0; new->rx_channel = 0; new->tx_channel = 0; new->rxfile = strdup ("eth_rx"); new->txfile = strdup ("eth_tx"); new->sockif = strdup ("or1ksim_eth"); new->base_vapi_id = 0; return new; } static void eth_sec_end (void *dat) { struct eth_device *eth = dat; struct mem_ops ops; if (!eth->enabled) { free (eth->rxfile); free (eth->txfile); free (eth->sockif); free (eth); return; } memset (&ops, 0, sizeof (struct mem_ops)); ops.readfunc32 = eth_read32; ops.writefunc32 = eth_write32; ops.read_dat32 = dat; ops.write_dat32 = dat; /* FIXME: Correct delay? */ ops.delayr = 2; ops.delayw = 2; reg_mem_area (eth->baseaddr, ETH_ADDR_SPACE, 0, &ops); reg_sim_stat (eth_status, dat); reg_sim_reset (eth_reset, dat); } /*---------------------------------------------------------------------------*/ /*!Register a new Ethernet configuration */ /*---------------------------------------------------------------------------*/ void reg_ethernet_sec () { struct config_section *sec = reg_config_sec ("ethernet", eth_sec_start, eth_sec_end); reg_config_param (sec, "enabled", PARAMT_INT, eth_enabled); reg_config_param (sec, "baseaddr", PARAMT_ADDR, eth_baseaddr); reg_config_param (sec, "dma", PARAMT_INT, eth_dma); reg_config_param (sec, "irq", PARAMT_INT, eth_irq); reg_config_param (sec, "rtx_type", PARAMT_INT, eth_rtx_type); reg_config_param (sec, "rx_channel", PARAMT_INT, eth_rx_channel); reg_config_param (sec, "tx_channel", PARAMT_INT, eth_tx_channel); reg_config_param (sec, "rxfile", PARAMT_STR, eth_rxfile); reg_config_param (sec, "txfile", PARAMT_STR, eth_txfile); reg_config_param (sec, "sockif", PARAMT_STR, eth_sockif); reg_config_param (sec, "vapi_id", PARAMT_INT, eth_vapi_id); } /* reg_ethernet_sec() */
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