| /* |
| * QEMU NE2000 emulation |
| * |
| * Copyright (c) 2003-2004 Fabrice Bellard |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "net/eth.h" |
| #include "qemu/module.h" |
| #include "exec/memory.h" |
| #include "hw/irq.h" |
| #include "migration/vmstate.h" |
| #include "ne2000.h" |
| #include "trace.h" |
| |
| /* debug NE2000 card */ |
| //#define DEBUG_NE2000 |
| |
| #define MAX_ETH_FRAME_SIZE 1514 |
| |
| #define E8390_CMD 0x00 /* The command register (for all pages) */ |
| /* Page 0 register offsets. */ |
| #define EN0_CLDALO 0x01 /* Low byte of current local dma addr RD */ |
| #define EN0_STARTPG 0x01 /* Starting page of ring bfr WR */ |
| #define EN0_CLDAHI 0x02 /* High byte of current local dma addr RD */ |
| #define EN0_STOPPG 0x02 /* Ending page +1 of ring bfr WR */ |
| #define EN0_BOUNDARY 0x03 /* Boundary page of ring bfr RD WR */ |
| #define EN0_TSR 0x04 /* Transmit status reg RD */ |
| #define EN0_TPSR 0x04 /* Transmit starting page WR */ |
| #define EN0_NCR 0x05 /* Number of collision reg RD */ |
| #define EN0_TCNTLO 0x05 /* Low byte of tx byte count WR */ |
| #define EN0_FIFO 0x06 /* FIFO RD */ |
| #define EN0_TCNTHI 0x06 /* High byte of tx byte count WR */ |
| #define EN0_ISR 0x07 /* Interrupt status reg RD WR */ |
| #define EN0_CRDALO 0x08 /* low byte of current remote dma address RD */ |
| #define EN0_RSARLO 0x08 /* Remote start address reg 0 */ |
| #define EN0_CRDAHI 0x09 /* high byte, current remote dma address RD */ |
| #define EN0_RSARHI 0x09 /* Remote start address reg 1 */ |
| #define EN0_RCNTLO 0x0a /* Remote byte count reg WR */ |
| #define EN0_RTL8029ID0 0x0a /* Realtek ID byte #1 RD */ |
| #define EN0_RCNTHI 0x0b /* Remote byte count reg WR */ |
| #define EN0_RTL8029ID1 0x0b /* Realtek ID byte #2 RD */ |
| #define EN0_RSR 0x0c /* rx status reg RD */ |
| #define EN0_RXCR 0x0c /* RX configuration reg WR */ |
| #define EN0_TXCR 0x0d /* TX configuration reg WR */ |
| #define EN0_COUNTER0 0x0d /* Rcv alignment error counter RD */ |
| #define EN0_DCFG 0x0e /* Data configuration reg WR */ |
| #define EN0_COUNTER1 0x0e /* Rcv CRC error counter RD */ |
| #define EN0_IMR 0x0f /* Interrupt mask reg WR */ |
| #define EN0_COUNTER2 0x0f /* Rcv missed frame error counter RD */ |
| |
| #define EN1_PHYS 0x11 |
| #define EN1_CURPAG 0x17 |
| #define EN1_MULT 0x18 |
| |
| #define EN2_STARTPG 0x21 /* Starting page of ring bfr RD */ |
| #define EN2_STOPPG 0x22 /* Ending page +1 of ring bfr RD */ |
| |
| #define EN3_CONFIG0 0x33 |
| #define EN3_CONFIG1 0x34 |
| #define EN3_CONFIG2 0x35 |
| #define EN3_CONFIG3 0x36 |
| |
| /* Register accessed at EN_CMD, the 8390 base addr. */ |
| #define E8390_STOP 0x01 /* Stop and reset the chip */ |
| #define E8390_START 0x02 /* Start the chip, clear reset */ |
| #define E8390_TRANS 0x04 /* Transmit a frame */ |
| #define E8390_RREAD 0x08 /* Remote read */ |
| #define E8390_RWRITE 0x10 /* Remote write */ |
| #define E8390_NODMA 0x20 /* Remote DMA */ |
| #define E8390_PAGE0 0x00 /* Select page chip registers */ |
| #define E8390_PAGE1 0x40 /* using the two high-order bits */ |
| #define E8390_PAGE2 0x80 /* Page 3 is invalid. */ |
| |
| /* Bits in EN0_ISR - Interrupt status register */ |
| #define ENISR_RX 0x01 /* Receiver, no error */ |
| #define ENISR_TX 0x02 /* Transmitter, no error */ |
| #define ENISR_RX_ERR 0x04 /* Receiver, with error */ |
| #define ENISR_TX_ERR 0x08 /* Transmitter, with error */ |
| #define ENISR_OVER 0x10 /* Receiver overwrote the ring */ |
| #define ENISR_COUNTERS 0x20 /* Counters need emptying */ |
| #define ENISR_RDC 0x40 /* remote dma complete */ |
| #define ENISR_RESET 0x80 /* Reset completed */ |
| #define ENISR_ALL 0x3f /* Interrupts we will enable */ |
| |
| /* Bits in received packet status byte and EN0_RSR*/ |
| #define ENRSR_RXOK 0x01 /* Received a good packet */ |
| #define ENRSR_CRC 0x02 /* CRC error */ |
| #define ENRSR_FAE 0x04 /* frame alignment error */ |
| #define ENRSR_FO 0x08 /* FIFO overrun */ |
| #define ENRSR_MPA 0x10 /* missed pkt */ |
| #define ENRSR_PHY 0x20 /* physical/multicast address */ |
| #define ENRSR_DIS 0x40 /* receiver disable. set in monitor mode */ |
| #define ENRSR_DEF 0x80 /* deferring */ |
| |
| /* Transmitted packet status, EN0_TSR. */ |
| #define ENTSR_PTX 0x01 /* Packet transmitted without error */ |
| #define ENTSR_ND 0x02 /* The transmit wasn't deferred. */ |
| #define ENTSR_COL 0x04 /* The transmit collided at least once. */ |
| #define ENTSR_ABT 0x08 /* The transmit collided 16 times, and was deferred. */ |
| #define ENTSR_CRS 0x10 /* The carrier sense was lost. */ |
| #define ENTSR_FU 0x20 /* A "FIFO underrun" occurred during transmit. */ |
| #define ENTSR_CDH 0x40 /* The collision detect "heartbeat" signal was lost. */ |
| #define ENTSR_OWC 0x80 /* There was an out-of-window collision. */ |
| |
| void ne2000_reset(NE2000State *s) |
| { |
| int i; |
| |
| s->isr = ENISR_RESET; |
| memcpy(s->mem, &s->c.macaddr, 6); |
| s->mem[14] = 0x57; |
| s->mem[15] = 0x57; |
| |
| /* duplicate prom data */ |
| for(i = 15;i >= 0; i--) { |
| s->mem[2 * i] = s->mem[i]; |
| s->mem[2 * i + 1] = s->mem[i]; |
| } |
| } |
| |
| static void ne2000_update_irq(NE2000State *s) |
| { |
| int isr; |
| isr = (s->isr & s->imr) & 0x7f; |
| #if defined(DEBUG_NE2000) |
| printf("NE2000: Set IRQ to %d (%02x %02x)\n", |
| isr ? 1 : 0, s->isr, s->imr); |
| #endif |
| qemu_set_irq(s->irq, (isr != 0)); |
| } |
| |
| static int ne2000_buffer_full(NE2000State *s) |
| { |
| int avail, index, boundary; |
| |
| if (s->stop <= s->start) { |
| return 1; |
| } |
| |
| index = s->curpag << 8; |
| boundary = s->boundary << 8; |
| if (index < boundary) |
| avail = boundary - index; |
| else |
| avail = (s->stop - s->start) - (index - boundary); |
| if (avail < (MAX_ETH_FRAME_SIZE + 4)) |
| return 1; |
| return 0; |
| } |
| |
| ssize_t ne2000_receive(NetClientState *nc, const uint8_t *buf, size_t size_) |
| { |
| NE2000State *s = qemu_get_nic_opaque(nc); |
| size_t size = size_; |
| uint8_t *p; |
| unsigned int total_len, next, avail, len, index, mcast_idx; |
| static const uint8_t broadcast_macaddr[6] = |
| { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; |
| |
| #if defined(DEBUG_NE2000) |
| printf("NE2000: received len=%zu\n", size); |
| #endif |
| |
| if (s->cmd & E8390_STOP || ne2000_buffer_full(s)) |
| return -1; |
| |
| /* XXX: check this */ |
| if (s->rxcr & 0x10) { |
| /* promiscuous: receive all */ |
| } else { |
| if (!memcmp(buf, broadcast_macaddr, 6)) { |
| /* broadcast address */ |
| if (!(s->rxcr & 0x04)) |
| return size; |
| } else if (buf[0] & 0x01) { |
| /* multicast */ |
| if (!(s->rxcr & 0x08)) |
| return size; |
| mcast_idx = net_crc32(buf, ETH_ALEN) >> 26; |
| if (!(s->mult[mcast_idx >> 3] & (1 << (mcast_idx & 7)))) |
| return size; |
| } else if (s->mem[0] == buf[0] && |
| s->mem[2] == buf[1] && |
| s->mem[4] == buf[2] && |
| s->mem[6] == buf[3] && |
| s->mem[8] == buf[4] && |
| s->mem[10] == buf[5]) { |
| /* match */ |
| } else { |
| return size; |
| } |
| } |
| |
| index = s->curpag << 8; |
| if (index >= NE2000_PMEM_END) { |
| index = s->start; |
| } |
| /* 4 bytes for header */ |
| total_len = size + 4; |
| /* address for next packet (4 bytes for CRC) */ |
| next = index + ((total_len + 4 + 255) & ~0xff); |
| if (next >= s->stop) |
| next -= (s->stop - s->start); |
| /* prepare packet header */ |
| p = s->mem + index; |
| s->rsr = ENRSR_RXOK; /* receive status */ |
| /* XXX: check this */ |
| if (buf[0] & 0x01) |
| s->rsr |= ENRSR_PHY; |
| p[0] = s->rsr; |
| p[1] = next >> 8; |
| p[2] = total_len; |
| p[3] = total_len >> 8; |
| index += 4; |
| |
| /* write packet data */ |
| while (size > 0) { |
| if (index <= s->stop) |
| avail = s->stop - index; |
| else |
| break; |
| len = size; |
| if (len > avail) |
| len = avail; |
| memcpy(s->mem + index, buf, len); |
| buf += len; |
| index += len; |
| if (index == s->stop) |
| index = s->start; |
| size -= len; |
| } |
| s->curpag = next >> 8; |
| |
| /* now we can signal we have received something */ |
| s->isr |= ENISR_RX; |
| ne2000_update_irq(s); |
| |
| return size_; |
| } |
| |
| static void ne2000_ioport_write(void *opaque, uint32_t addr, uint32_t val) |
| { |
| NE2000State *s = opaque; |
| int offset, page, index; |
| |
| addr &= 0xf; |
| trace_ne2000_ioport_write(addr, val); |
| if (addr == E8390_CMD) { |
| /* control register */ |
| s->cmd = val; |
| if (!(val & E8390_STOP)) { /* START bit makes no sense on RTL8029... */ |
| s->isr &= ~ENISR_RESET; |
| /* test specific case: zero length transfer */ |
| if ((val & (E8390_RREAD | E8390_RWRITE)) && |
| s->rcnt == 0) { |
| s->isr |= ENISR_RDC; |
| ne2000_update_irq(s); |
| } |
| if (val & E8390_TRANS) { |
| index = (s->tpsr << 8); |
| /* XXX: next 2 lines are a hack to make netware 3.11 work */ |
| if (index >= NE2000_PMEM_END) |
| index -= NE2000_PMEM_SIZE; |
| /* fail safe: check range on the transmitted length */ |
| if (index + s->tcnt <= NE2000_PMEM_END) { |
| qemu_send_packet(qemu_get_queue(s->nic), s->mem + index, |
| s->tcnt); |
| } |
| /* signal end of transfer */ |
| s->tsr = ENTSR_PTX; |
| s->isr |= ENISR_TX; |
| s->cmd &= ~E8390_TRANS; |
| ne2000_update_irq(s); |
| } |
| } |
| } else { |
| page = s->cmd >> 6; |
| offset = addr | (page << 4); |
| switch(offset) { |
| case EN0_STARTPG: |
| if (val << 8 <= NE2000_PMEM_END) { |
| s->start = val << 8; |
| } |
| break; |
| case EN0_STOPPG: |
| if (val << 8 <= NE2000_PMEM_END) { |
| s->stop = val << 8; |
| } |
| break; |
| case EN0_BOUNDARY: |
| if (val << 8 < NE2000_PMEM_END) { |
| s->boundary = val; |
| } |
| break; |
| case EN0_IMR: |
| s->imr = val; |
| ne2000_update_irq(s); |
| break; |
| case EN0_TPSR: |
| s->tpsr = val; |
| break; |
| case EN0_TCNTLO: |
| s->tcnt = (s->tcnt & 0xff00) | val; |
| break; |
| case EN0_TCNTHI: |
| s->tcnt = (s->tcnt & 0x00ff) | (val << 8); |
| break; |
| case EN0_RSARLO: |
| s->rsar = (s->rsar & 0xff00) | val; |
| break; |
| case EN0_RSARHI: |
| s->rsar = (s->rsar & 0x00ff) | (val << 8); |
| break; |
| case EN0_RCNTLO: |
| s->rcnt = (s->rcnt & 0xff00) | val; |
| break; |
| case EN0_RCNTHI: |
| s->rcnt = (s->rcnt & 0x00ff) | (val << 8); |
| break; |
| case EN0_RXCR: |
| s->rxcr = val; |
| break; |
| case EN0_DCFG: |
| s->dcfg = val; |
| break; |
| case EN0_ISR: |
| s->isr &= ~(val & 0x7f); |
| ne2000_update_irq(s); |
| break; |
| case EN1_PHYS ... EN1_PHYS + 5: |
| s->phys[offset - EN1_PHYS] = val; |
| break; |
| case EN1_CURPAG: |
| if (val << 8 < NE2000_PMEM_END) { |
| s->curpag = val; |
| } |
| break; |
| case EN1_MULT ... EN1_MULT + 7: |
| s->mult[offset - EN1_MULT] = val; |
| break; |
| } |
| } |
| } |
| |
| static uint32_t ne2000_ioport_read(void *opaque, uint32_t addr) |
| { |
| NE2000State *s = opaque; |
| int offset, page, ret; |
| |
| addr &= 0xf; |
| if (addr == E8390_CMD) { |
| ret = s->cmd; |
| } else { |
| page = s->cmd >> 6; |
| offset = addr | (page << 4); |
| switch(offset) { |
| case EN0_TSR: |
| ret = s->tsr; |
| break; |
| case EN0_BOUNDARY: |
| ret = s->boundary; |
| break; |
| case EN0_ISR: |
| ret = s->isr; |
| break; |
| case EN0_RSARLO: |
| ret = s->rsar & 0x00ff; |
| break; |
| case EN0_RSARHI: |
| ret = s->rsar >> 8; |
| break; |
| case EN1_PHYS ... EN1_PHYS + 5: |
| ret = s->phys[offset - EN1_PHYS]; |
| break; |
| case EN1_CURPAG: |
| ret = s->curpag; |
| break; |
| case EN1_MULT ... EN1_MULT + 7: |
| ret = s->mult[offset - EN1_MULT]; |
| break; |
| case EN0_RSR: |
| ret = s->rsr; |
| break; |
| case EN2_STARTPG: |
| ret = s->start >> 8; |
| break; |
| case EN2_STOPPG: |
| ret = s->stop >> 8; |
| break; |
| case EN0_RTL8029ID0: |
| ret = 0x50; |
| break; |
| case EN0_RTL8029ID1: |
| ret = 0x43; |
| break; |
| case EN3_CONFIG0: |
| ret = 0; /* 10baseT media */ |
| break; |
| case EN3_CONFIG2: |
| ret = 0x40; /* 10baseT active */ |
| break; |
| case EN3_CONFIG3: |
| ret = 0x40; /* Full duplex */ |
| break; |
| default: |
| ret = 0x00; |
| break; |
| } |
| } |
| trace_ne2000_ioport_read(addr, ret); |
| return ret; |
| } |
| |
| static inline void ne2000_mem_writeb(NE2000State *s, uint32_t addr, |
| uint32_t val) |
| { |
| if (addr < 32 || |
| (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) { |
| s->mem[addr] = val; |
| } |
| } |
| |
| static inline void ne2000_mem_writew(NE2000State *s, uint32_t addr, |
| uint32_t val) |
| { |
| addr &= ~1; /* XXX: check exact behaviour if not even */ |
| if (addr < 32 || |
| (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) { |
| *(uint16_t *)(s->mem + addr) = cpu_to_le16(val); |
| } |
| } |
| |
| static inline void ne2000_mem_writel(NE2000State *s, uint32_t addr, |
| uint32_t val) |
| { |
| addr &= ~1; /* XXX: check exact behaviour if not even */ |
| if (addr < 32 |
| || (addr >= NE2000_PMEM_START |
| && addr + sizeof(uint32_t) <= NE2000_MEM_SIZE)) { |
| stl_le_p(s->mem + addr, val); |
| } |
| } |
| |
| static inline uint32_t ne2000_mem_readb(NE2000State *s, uint32_t addr) |
| { |
| if (addr < 32 || |
| (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) { |
| return s->mem[addr]; |
| } else { |
| return 0xff; |
| } |
| } |
| |
| static inline uint32_t ne2000_mem_readw(NE2000State *s, uint32_t addr) |
| { |
| addr &= ~1; /* XXX: check exact behaviour if not even */ |
| if (addr < 32 || |
| (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) { |
| return le16_to_cpu(*(uint16_t *)(s->mem + addr)); |
| } else { |
| return 0xffff; |
| } |
| } |
| |
| static inline uint32_t ne2000_mem_readl(NE2000State *s, uint32_t addr) |
| { |
| addr &= ~1; /* XXX: check exact behaviour if not even */ |
| if (addr < 32 |
| || (addr >= NE2000_PMEM_START |
| && addr + sizeof(uint32_t) <= NE2000_MEM_SIZE)) { |
| return ldl_le_p(s->mem + addr); |
| } else { |
| return 0xffffffff; |
| } |
| } |
| |
| static inline void ne2000_dma_update(NE2000State *s, int len) |
| { |
| s->rsar += len; |
| /* wrap */ |
| /* XXX: check what to do if rsar > stop */ |
| if (s->rsar == s->stop) |
| s->rsar = s->start; |
| |
| if (s->rcnt <= len) { |
| s->rcnt = 0; |
| /* signal end of transfer */ |
| s->isr |= ENISR_RDC; |
| ne2000_update_irq(s); |
| } else { |
| s->rcnt -= len; |
| } |
| } |
| |
| static void ne2000_asic_ioport_write(void *opaque, uint32_t addr, uint32_t val) |
| { |
| NE2000State *s = opaque; |
| |
| #ifdef DEBUG_NE2000 |
| printf("NE2000: asic write val=0x%04x\n", val); |
| #endif |
| if (s->rcnt == 0) |
| return; |
| if (s->dcfg & 0x01) { |
| /* 16 bit access */ |
| ne2000_mem_writew(s, s->rsar, val); |
| ne2000_dma_update(s, 2); |
| } else { |
| /* 8 bit access */ |
| ne2000_mem_writeb(s, s->rsar, val); |
| ne2000_dma_update(s, 1); |
| } |
| } |
| |
| static uint32_t ne2000_asic_ioport_read(void *opaque, uint32_t addr) |
| { |
| NE2000State *s = opaque; |
| int ret; |
| |
| if (s->dcfg & 0x01) { |
| /* 16 bit access */ |
| ret = ne2000_mem_readw(s, s->rsar); |
| ne2000_dma_update(s, 2); |
| } else { |
| /* 8 bit access */ |
| ret = ne2000_mem_readb(s, s->rsar); |
| ne2000_dma_update(s, 1); |
| } |
| #ifdef DEBUG_NE2000 |
| printf("NE2000: asic read val=0x%04x\n", ret); |
| #endif |
| return ret; |
| } |
| |
| static void ne2000_asic_ioport_writel(void *opaque, uint32_t addr, uint32_t val) |
| { |
| NE2000State *s = opaque; |
| |
| #ifdef DEBUG_NE2000 |
| printf("NE2000: asic writel val=0x%04x\n", val); |
| #endif |
| if (s->rcnt == 0) |
| return; |
| /* 32 bit access */ |
| ne2000_mem_writel(s, s->rsar, val); |
| ne2000_dma_update(s, 4); |
| } |
| |
| static uint32_t ne2000_asic_ioport_readl(void *opaque, uint32_t addr) |
| { |
| NE2000State *s = opaque; |
| int ret; |
| |
| /* 32 bit access */ |
| ret = ne2000_mem_readl(s, s->rsar); |
| ne2000_dma_update(s, 4); |
| #ifdef DEBUG_NE2000 |
| printf("NE2000: asic readl val=0x%04x\n", ret); |
| #endif |
| return ret; |
| } |
| |
| static void ne2000_reset_ioport_write(void *opaque, uint32_t addr, uint32_t val) |
| { |
| /* nothing to do (end of reset pulse) */ |
| } |
| |
| static uint32_t ne2000_reset_ioport_read(void *opaque, uint32_t addr) |
| { |
| NE2000State *s = opaque; |
| ne2000_reset(s); |
| return 0; |
| } |
| |
| static int ne2000_post_load(void* opaque, int version_id) |
| { |
| NE2000State* s = opaque; |
| |
| if (version_id < 2) { |
| s->rxcr = 0x0c; |
| } |
| return 0; |
| } |
| |
| const VMStateDescription vmstate_ne2000 = { |
| .name = "ne2000", |
| .version_id = 2, |
| .minimum_version_id = 0, |
| .post_load = ne2000_post_load, |
| .fields = (const VMStateField[]) { |
| VMSTATE_UINT8_V(rxcr, NE2000State, 2), |
| VMSTATE_UINT8(cmd, NE2000State), |
| VMSTATE_UINT32(start, NE2000State), |
| VMSTATE_UINT32(stop, NE2000State), |
| VMSTATE_UINT8(boundary, NE2000State), |
| VMSTATE_UINT8(tsr, NE2000State), |
| VMSTATE_UINT8(tpsr, NE2000State), |
| VMSTATE_UINT16(tcnt, NE2000State), |
| VMSTATE_UINT16(rcnt, NE2000State), |
| VMSTATE_UINT32(rsar, NE2000State), |
| VMSTATE_UINT8(rsr, NE2000State), |
| VMSTATE_UINT8(isr, NE2000State), |
| VMSTATE_UINT8(dcfg, NE2000State), |
| VMSTATE_UINT8(imr, NE2000State), |
| VMSTATE_BUFFER(phys, NE2000State), |
| VMSTATE_UINT8(curpag, NE2000State), |
| VMSTATE_BUFFER(mult, NE2000State), |
| VMSTATE_UNUSED(4), /* was irq */ |
| VMSTATE_BUFFER(mem, NE2000State), |
| VMSTATE_END_OF_LIST() |
| } |
| }; |
| |
| static uint64_t ne2000_read(void *opaque, hwaddr addr, |
| unsigned size) |
| { |
| NE2000State *s = opaque; |
| uint64_t val; |
| |
| if (addr < 0x10 && size == 1) { |
| val = ne2000_ioport_read(s, addr); |
| } else if (addr == 0x10) { |
| if (size <= 2) { |
| val = ne2000_asic_ioport_read(s, addr); |
| } else { |
| val = ne2000_asic_ioport_readl(s, addr); |
| } |
| } else if (addr == 0x1f && size == 1) { |
| val = ne2000_reset_ioport_read(s, addr); |
| } else { |
| val = ((uint64_t)1 << (size * 8)) - 1; |
| } |
| trace_ne2000_read(addr, val); |
| |
| return val; |
| } |
| |
| static void ne2000_write(void *opaque, hwaddr addr, |
| uint64_t data, unsigned size) |
| { |
| NE2000State *s = opaque; |
| |
| trace_ne2000_write(addr, data); |
| if (addr < 0x10 && size == 1) { |
| ne2000_ioport_write(s, addr, data); |
| } else if (addr == 0x10) { |
| if (size <= 2) { |
| ne2000_asic_ioport_write(s, addr, data); |
| } else { |
| ne2000_asic_ioport_writel(s, addr, data); |
| } |
| } else if (addr == 0x1f && size == 1) { |
| ne2000_reset_ioport_write(s, addr, data); |
| } |
| } |
| |
| static const MemoryRegionOps ne2000_ops = { |
| .read = ne2000_read, |
| .write = ne2000_write, |
| .endianness = DEVICE_LITTLE_ENDIAN, |
| }; |
| |
| /***********************************************************/ |
| /* PCI NE2000 definitions */ |
| |
| void ne2000_setup_io(NE2000State *s, DeviceState *dev, unsigned size) |
| { |
| memory_region_init_io(&s->io, OBJECT(dev), &ne2000_ops, s, "ne2000", size); |
| } |
