| 1 | /* |
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| 2 | * QEMU NE2000 emulation |
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| 3 | * |
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| 4 | * Copyright (c) 2003-2004 Fabrice Bellard |
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| 5 | * |
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| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
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| 7 | * of this software and associated documentation files (the "Software"), to deal |
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| 8 | * in the Software without restriction, including without limitation the rights |
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| 9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
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| 10 | * copies of the Software, and to permit persons to whom the Software is |
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| 11 | * furnished to do so, subject to the following conditions: |
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| 12 | * |
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| 13 | * The above copyright notice and this permission notice shall be included in |
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| 14 | * all copies or substantial portions of the Software. |
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| 15 | * |
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| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
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| 22 | * THE SOFTWARE. |
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| 23 | */ |
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| 24 | #include "vl.h" |
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| 25 | |
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| 26 | /* debug NE2000 card */ |
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| 27 | //#define DEBUG_NE2000 |
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| 28 | |
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| 29 | #define MAX_ETH_FRAME_SIZE 1514 |
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| 30 | |
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| 31 | #define E8390_CMD 0x00 /* The command register (for all pages) */ |
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| 32 | /* Page 0 register offsets. */ |
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| 33 | #define EN0_CLDALO 0x01 /* Low byte of current local dma addr RD */ |
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| 34 | #define EN0_STARTPG 0x01 /* Starting page of ring bfr WR */ |
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| 35 | #define EN0_CLDAHI 0x02 /* High byte of current local dma addr RD */ |
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| 36 | #define EN0_STOPPG 0x02 /* Ending page +1 of ring bfr WR */ |
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| 37 | #define EN0_BOUNDARY 0x03 /* Boundary page of ring bfr RD WR */ |
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| 38 | #define EN0_TSR 0x04 /* Transmit status reg RD */ |
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| 39 | #define EN0_TPSR 0x04 /* Transmit starting page WR */ |
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| 40 | #define EN0_NCR 0x05 /* Number of collision reg RD */ |
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| 41 | #define EN0_TCNTLO 0x05 /* Low byte of tx byte count WR */ |
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| 42 | #define EN0_FIFO 0x06 /* FIFO RD */ |
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| 43 | #define EN0_TCNTHI 0x06 /* High byte of tx byte count WR */ |
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| 44 | #define EN0_ISR 0x07 /* Interrupt status reg RD WR */ |
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| 45 | #define EN0_CRDALO 0x08 /* low byte of current remote dma address RD */ |
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| 46 | #define EN0_RSARLO 0x08 /* Remote start address reg 0 */ |
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| 47 | #define EN0_CRDAHI 0x09 /* high byte, current remote dma address RD */ |
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| 48 | #define EN0_RSARHI 0x09 /* Remote start address reg 1 */ |
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| 49 | #define EN0_RCNTLO 0x0a /* Remote byte count reg WR */ |
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| 50 | #define EN0_RTL8029ID0 0x0a /* Realtek ID byte #1 RD */ |
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| 51 | #define EN0_RCNTHI 0x0b /* Remote byte count reg WR */ |
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| 52 | #define EN0_RTL8029ID1 0x0b /* Realtek ID byte #2 RD */ |
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| 53 | #define EN0_RSR 0x0c /* rx status reg RD */ |
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| 54 | #define EN0_RXCR 0x0c /* RX configuration reg WR */ |
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| 55 | #define EN0_TXCR 0x0d /* TX configuration reg WR */ |
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| 56 | #define EN0_COUNTER0 0x0d /* Rcv alignment error counter RD */ |
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| 57 | #define EN0_DCFG 0x0e /* Data configuration reg WR */ |
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| 58 | #define EN0_COUNTER1 0x0e /* Rcv CRC error counter RD */ |
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| 59 | #define EN0_IMR 0x0f /* Interrupt mask reg WR */ |
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| 60 | #define EN0_COUNTER2 0x0f /* Rcv missed frame error counter RD */ |
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| 61 | |
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| 62 | #define EN1_PHYS 0x11 |
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| 63 | #define EN1_CURPAG 0x17 |
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| 64 | #define EN1_MULT 0x18 |
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| 65 | |
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| 66 | #define EN2_STARTPG 0x21 /* Starting page of ring bfr RD */ |
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| 67 | #define EN2_STOPPG 0x22 /* Ending page +1 of ring bfr RD */ |
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| 68 | |
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| 69 | #define EN3_CONFIG0 0x33 |
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| 70 | #define EN3_CONFIG1 0x34 |
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| 71 | #define EN3_CONFIG2 0x35 |
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| 72 | #define EN3_CONFIG3 0x36 |
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| 73 | |
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| 74 | /* Register accessed at EN_CMD, the 8390 base addr. */ |
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| 75 | #define E8390_STOP 0x01 /* Stop and reset the chip */ |
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| 76 | #define E8390_START 0x02 /* Start the chip, clear reset */ |
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| 77 | #define E8390_TRANS 0x04 /* Transmit a frame */ |
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| 78 | #define E8390_RREAD 0x08 /* Remote read */ |
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| 79 | #define E8390_RWRITE 0x10 /* Remote write */ |
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| 80 | #define E8390_NODMA 0x20 /* Remote DMA */ |
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| 81 | #define E8390_PAGE0 0x00 /* Select page chip registers */ |
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| 82 | #define E8390_PAGE1 0x40 /* using the two high-order bits */ |
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| 83 | #define E8390_PAGE2 0x80 /* Page 3 is invalid. */ |
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| 84 | |
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| 85 | /* Bits in EN0_ISR - Interrupt status register */ |
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| 86 | #define ENISR_RX 0x01 /* Receiver, no error */ |
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| 87 | #define ENISR_TX 0x02 /* Transmitter, no error */ |
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| 88 | #define ENISR_RX_ERR 0x04 /* Receiver, with error */ |
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| 89 | #define ENISR_TX_ERR 0x08 /* Transmitter, with error */ |
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| 90 | #define ENISR_OVER 0x10 /* Receiver overwrote the ring */ |
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| 91 | #define ENISR_COUNTERS 0x20 /* Counters need emptying */ |
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| 92 | #define ENISR_RDC 0x40 /* remote dma complete */ |
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| 93 | #define ENISR_RESET 0x80 /* Reset completed */ |
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| 94 | #define ENISR_ALL 0x3f /* Interrupts we will enable */ |
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| 95 | |
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| 96 | /* Bits in received packet status byte and EN0_RSR*/ |
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| 97 | #define ENRSR_RXOK 0x01 /* Received a good packet */ |
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| 98 | #define ENRSR_CRC 0x02 /* CRC error */ |
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| 99 | #define ENRSR_FAE 0x04 /* frame alignment error */ |
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| 100 | #define ENRSR_FO 0x08 /* FIFO overrun */ |
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| 101 | #define ENRSR_MPA 0x10 /* missed pkt */ |
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| 102 | #define ENRSR_PHY 0x20 /* physical/multicast address */ |
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| 103 | #define ENRSR_DIS 0x40 /* receiver disable. set in monitor mode */ |
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| 104 | #define ENRSR_DEF 0x80 /* deferring */ |
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| 105 | |
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| 106 | /* Transmitted packet status, EN0_TSR. */ |
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| 107 | #define ENTSR_PTX 0x01 /* Packet transmitted without error */ |
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| 108 | #define ENTSR_ND 0x02 /* The transmit wasn't deferred. */ |
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| 109 | #define ENTSR_COL 0x04 /* The transmit collided at least once. */ |
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| 110 | #define ENTSR_ABT 0x08 /* The transmit collided 16 times, and was deferred. */ |
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| 111 | #define ENTSR_CRS 0x10 /* The carrier sense was lost. */ |
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| 112 | #define ENTSR_FU 0x20 /* A "FIFO underrun" occurred during transmit. */ |
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| 113 | #define ENTSR_CDH 0x40 /* The collision detect "heartbeat" signal was lost. */ |
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| 114 | #define ENTSR_OWC 0x80 /* There was an out-of-window collision. */ |
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| 115 | |
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| 116 | #define NE2000_PMEM_SIZE (32*1024) |
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| 117 | #define NE2000_PMEM_START (16*1024) |
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| 118 | #define NE2000_PMEM_END (NE2000_PMEM_SIZE+NE2000_PMEM_START) |
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| 119 | #define NE2000_MEM_SIZE NE2000_PMEM_END |
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| 120 | |
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| 121 | typedef struct NE2000State { |
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| 122 | uint8_t cmd; |
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| 123 | uint32_t start; |
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| 124 | uint32_t stop; |
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| 125 | uint8_t boundary; |
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| 126 | uint8_t tsr; |
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| 127 | uint8_t tpsr; |
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| 128 | uint16_t tcnt; |
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| 129 | uint16_t rcnt; |
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| 130 | uint32_t rsar; |
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| 131 | uint8_t rsr; |
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| 132 | uint8_t rxcr; |
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| 133 | uint8_t isr; |
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| 134 | uint8_t dcfg; |
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| 135 | uint8_t imr; |
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| 136 | uint8_t phys[6]; /* mac address */ |
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| 137 | uint8_t curpag; |
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| 138 | uint8_t mult[8]; /* multicast mask array */ |
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| 139 | int irq; |
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| 140 | int tainted; |
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| 141 | PCIDevice *pci_dev; |
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| 142 | VLANClientState *vc; |
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| 143 | uint8_t macaddr[6]; |
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| 144 | uint8_t mem[NE2000_MEM_SIZE]; |
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| 145 | } NE2000State; |
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| 146 | |
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| 147 | static void ne2000_reset(NE2000State *s) |
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| 148 | { |
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| 149 | int i; |
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| 150 | |
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| 151 | s->isr = ENISR_RESET; |
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| 152 | memcpy(s->mem, s->macaddr, 6); |
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| 153 | s->mem[14] = 0x57; |
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| 154 | s->mem[15] = 0x57; |
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| 155 | |
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| 156 | /* duplicate prom data */ |
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| 157 | for(i = 15;i >= 0; i--) { |
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| 158 | s->mem[2 * i] = s->mem[i]; |
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| 159 | s->mem[2 * i + 1] = s->mem[i]; |
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| 160 | } |
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| 161 | } |
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| 162 | |
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| 163 | static void ne2000_update_irq(NE2000State *s) |
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| 164 | { |
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| 165 | int isr; |
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| 166 | isr = (s->isr & s->imr) & 0x7f; |
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| 167 | #if defined(DEBUG_NE2000) |
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| 168 | printf("NE2000: Set IRQ line %d to %d (%02x %02x)\n", |
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| 169 | s->irq, isr ? 1 : 0, s->isr, s->imr); |
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| 170 | #endif |
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| 171 | if (s->irq == 16) { |
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| 172 | /* PCI irq */ |
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| 173 | pci_set_irq(s->pci_dev, 0, (isr != 0)); |
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| 174 | } else { |
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| 175 | /* ISA irq */ |
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| 176 | pic_set_irq(s->irq, (isr != 0)); |
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| 177 | } |
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| 178 | } |
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| 179 | |
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| 180 | #define POLYNOMIAL 0x04c11db6 |
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| 181 | |
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| 182 | /* From FreeBSD */ |
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| 183 | /* XXX: optimize */ |
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| 184 | static int compute_mcast_idx(const uint8_t *ep) |
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| 185 | { |
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| 186 | uint32_t crc; |
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| 187 | int carry, i, j; |
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| 188 | uint8_t b; |
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| 189 | |
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| 190 | crc = 0xffffffff; |
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| 191 | for (i = 0; i < 6; i++) { |
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| 192 | b = *ep++; |
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| 193 | for (j = 0; j < 8; j++) { |
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| 194 | carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01); |
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| 195 | crc <<= 1; |
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| 196 | b >>= 1; |
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| 197 | if (carry) |
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| 198 | crc = ((crc ^ POLYNOMIAL) | carry); |
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| 199 | } |
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| 200 | } |
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| 201 | return (crc >> 26); |
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| 202 | } |
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| 203 | |
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| 204 | static int ne2000_buffer_full(NE2000State *s) |
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| 205 | { |
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| 206 | int avail, index, boundary; |
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| 207 | |
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| 208 | index = s->curpag << 8; |
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| 209 | boundary = s->boundary << 8; |
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| 210 | if (index <= boundary) |
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| 211 | avail = boundary - index; |
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| 212 | else |
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| 213 | avail = (s->stop - s->start) - (index - boundary); |
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| 214 | if (avail < (MAX_ETH_FRAME_SIZE + 4)) |
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| 215 | return 1; |
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| 216 | return 0; |
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| 217 | } |
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| 218 | |
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| 219 | static int ne2000_can_receive(void *opaque) |
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| 220 | { |
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| 221 | NE2000State *s = opaque; |
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| 222 | |
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| 223 | if (s->cmd & E8390_STOP) |
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| 224 | return 1; |
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| 225 | return !ne2000_buffer_full(s); |
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| 226 | } |
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| 227 | |
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| 228 | #define MIN_BUF_SIZE 60 |
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| 229 | |
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| 230 | static inline int ne2000_valid_ring_addr(NE2000State *s, unsigned int addr) |
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| 231 | { |
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| 232 | addr <<= 8; |
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| 233 | return addr < s->stop && addr >= s->start; |
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| 234 | } |
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| 235 | |
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| 236 | static inline int ne2000_check_state(NE2000State *s) |
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| 237 | { |
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| 238 | if (!s->tainted) |
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| 239 | return 0; |
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| 240 | |
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| 241 | if (s->start >= s->stop || s->stop > NE2000_MEM_SIZE) |
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| 242 | return -EINVAL; |
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| 243 | |
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| 244 | if (!ne2000_valid_ring_addr(s, s->curpag)) |
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| 245 | return -EINVAL; |
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| 246 | |
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| 247 | s->tainted = 0; |
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| 248 | return 0; |
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| 249 | } |
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| 250 | |
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| 251 | static void ne2000_receive(void *opaque, const uint8_t *buf, int size) |
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| 252 | { |
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| 253 | NE2000State *s = opaque; |
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| 254 | uint8_t *p; |
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| 255 | int total_len, next, avail, len, index, mcast_idx; |
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| 256 | uint8_t buf1[60]; |
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| 257 | static const uint8_t broadcast_macaddr[6] = |
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| 258 | { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; |
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| 259 | |
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| 260 | #if defined(DEBUG_NE2000) |
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| 261 | printf("NE2000: received len=%d\n", size); |
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| 262 | #endif |
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| 263 | |
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| 264 | if (ne2000_check_state(s)) |
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| 265 | return; |
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| 266 | |
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| 267 | if (!ne2000_valid_ring_addr(s, s->boundary)) |
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| 268 | return; |
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| 269 | |
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| 270 | if (s->cmd & E8390_STOP || ne2000_buffer_full(s)) |
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| 271 | return; |
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| 272 | |
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| 273 | /* XXX: check this */ |
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| 274 | if (s->rxcr & 0x10) { |
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| 275 | /* promiscuous: receive all */ |
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| 276 | } else { |
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| 277 | if (!memcmp(buf, broadcast_macaddr, 6)) { |
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| 278 | /* broadcast address */ |
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| 279 | if (!(s->rxcr & 0x04)) |
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| 280 | return; |
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| 281 | } else if (buf[0] & 0x01) { |
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| 282 | /* multicast */ |
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| 283 | if (!(s->rxcr & 0x08)) |
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| 284 | return; |
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| 285 | mcast_idx = compute_mcast_idx(buf); |
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| 286 | if (!(s->mult[mcast_idx >> 3] & (1 << (mcast_idx & 7)))) |
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| 287 | return; |
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| 288 | } else if (s->mem[0] == buf[0] && |
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| 289 | s->mem[2] == buf[1] && |
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| 290 | s->mem[4] == buf[2] && |
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| 291 | s->mem[6] == buf[3] && |
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| 292 | s->mem[8] == buf[4] && |
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| 293 | s->mem[10] == buf[5]) { |
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| 294 | /* match */ |
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| 295 | } else { |
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| 296 | return; |
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| 297 | } |
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| 298 | } |
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| 299 | |
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| 300 | |
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| 301 | /* if too small buffer, then expand it */ |
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| 302 | if (size < MIN_BUF_SIZE) { |
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| 303 | memcpy(buf1, buf, size); |
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| 304 | memset(buf1 + size, 0, MIN_BUF_SIZE - size); |
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| 305 | buf = buf1; |
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| 306 | size = MIN_BUF_SIZE; |
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| 307 | } |
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| 308 | |
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| 309 | index = s->curpag << 8; |
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| 310 | /* 4 bytes for header */ |
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| 311 | total_len = size + 4; |
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| 312 | /* address for next packet (4 bytes for CRC) */ |
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| 313 | next = index + ((total_len + 4 + 255) & ~0xff); |
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| 314 | if (next >= s->stop) |
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| 315 | next -= (s->stop - s->start); |
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| 316 | /* prepare packet header */ |
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| 317 | p = s->mem + index; |
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| 318 | s->rsr = ENRSR_RXOK; /* receive status */ |
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| 319 | /* XXX: check this */ |
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| 320 | if (buf[0] & 0x01) |
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| 321 | s->rsr |= ENRSR_PHY; |
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| 322 | p[0] = s->rsr; |
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| 323 | p[1] = next >> 8; |
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| 324 | p[2] = total_len; |
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| 325 | p[3] = total_len >> 8; |
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| 326 | index += 4; |
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| 327 | |
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| 328 | /* write packet data */ |
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| 329 | while (size > 0) { |
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| 330 | avail = s->stop - index; |
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| 331 | len = size; |
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| 332 | if (len > avail) |
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| 333 | len = avail; |
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| 334 | memcpy(s->mem + index, buf, len); |
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| 335 | buf += len; |
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| 336 | index += len; |
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| 337 | if (index == s->stop) |
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| 338 | index = s->start; |
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| 339 | size -= len; |
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| 340 | } |
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| 341 | s->curpag = next >> 8; |
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| 342 | |
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| 343 | /* now we can signal we have receive something */ |
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| 344 | s->isr |= ENISR_RX; |
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| 345 | ne2000_update_irq(s); |
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| 346 | } |
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| 347 | |
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| 348 | static void ne2000_ioport_write(void *opaque, uint32_t addr, uint32_t val) |
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| 349 | { |
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| 350 | NE2000State *s = opaque; |
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| 351 | int offset, page, index; |
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| 352 | |
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| 353 | addr &= 0xf; |
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| 354 | #ifdef DEBUG_NE2000 |
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| 355 | printf("NE2000: write addr=0x%x val=0x%02x\n", addr, val); |
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| 356 | #endif |
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| 357 | if (addr == E8390_CMD) { |
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| 358 | /* control register */ |
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| 359 | s->cmd = val; |
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| 360 | if (!(val & E8390_STOP)) { /* START bit makes no sense on RTL8029... */ |
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| 361 | s->isr &= ~ENISR_RESET; |
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| 362 | /* test specific case: zero length transfert */ |
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| 363 | if ((val & (E8390_RREAD | E8390_RWRITE)) && |
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| 364 | s->rcnt == 0) { |
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| 365 | s->isr |= ENISR_RDC; |
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| 366 | ne2000_update_irq(s); |
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| 367 | } |
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| 368 | if (val & E8390_TRANS) { |
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| 369 | index = (s->tpsr << 8); |
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| 370 | /* XXX: next 2 lines are a hack to make netware 3.11 work */ |
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| 371 | if (index >= NE2000_PMEM_END) |
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| 372 | index -= NE2000_PMEM_SIZE; |
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| 373 | /* fail safe: check range on the transmitted length */ |
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| 374 | if (index + s->tcnt <= NE2000_PMEM_END) { |
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| 375 | qemu_send_packet(s->vc, s->mem + index, s->tcnt); |
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| 376 | } |
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| 377 | /* signal end of transfert */ |
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| 378 | s->tsr = ENTSR_PTX; |
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| 379 | s->isr |= ENISR_TX; |
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| 380 | s->cmd &= ~E8390_TRANS; |
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| 381 | ne2000_update_irq(s); |
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| 382 | } |
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| 383 | } |
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| 384 | } else { |
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| 385 | page = s->cmd >> 6; |
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| 386 | offset = addr | (page << 4); |
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| 387 | switch(offset) { |
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| 388 | case EN0_STARTPG: |
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| 389 | s->start = val << 8; |
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| 390 | s->tainted = 1; |
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| 391 | break; |
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| 392 | case EN0_STOPPG: |
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| 393 | s->stop = val << 8; |
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| 394 | s->tainted = 1; |
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| 395 | break; |
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| 396 | case EN0_BOUNDARY: |
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| 397 | s->boundary = val; |
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| 398 | break; |
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| 399 | case EN0_IMR: |
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| 400 | s->imr = val; |
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| 401 | ne2000_update_irq(s); |
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| 402 | break; |
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| 403 | case EN0_TPSR: |
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| 404 | s->tpsr = val; |
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| 405 | break; |
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| 406 | case EN0_TCNTLO: |
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| 407 | s->tcnt = (s->tcnt & 0xff00) | val; |
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| 408 | break; |
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| 409 | case EN0_TCNTHI: |
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| 410 | s->tcnt = (s->tcnt & 0x00ff) | (val << 8); |
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| 411 | break; |
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| 412 | case EN0_RSARLO: |
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| 413 | s->rsar = (s->rsar & 0xff00) | val; |
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| 414 | break; |
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| 415 | case EN0_RSARHI: |
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| 416 | s->rsar = (s->rsar & 0x00ff) | (val << 8); |
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| 417 | break; |
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| 418 | case EN0_RCNTLO: |
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| 419 | s->rcnt = (s->rcnt & 0xff00) | val; |
|---|
| 420 | break; |
|---|
| 421 | case EN0_RCNTHI: |
|---|
| 422 | s->rcnt = (s->rcnt & 0x00ff) | (val << 8); |
|---|
| 423 | break; |
|---|
| 424 | case EN0_RXCR: |
|---|
| 425 | s->rxcr = val; |
|---|
| 426 | break; |
|---|
| 427 | case EN0_DCFG: |
|---|
| 428 | s->dcfg = val; |
|---|
| 429 | break; |
|---|
| 430 | case EN0_ISR: |
|---|
| 431 | s->isr &= ~(val & 0x7f); |
|---|
| 432 | ne2000_update_irq(s); |
|---|
| 433 | break; |
|---|
| 434 | case EN1_PHYS ... EN1_PHYS + 5: |
|---|
| 435 | s->phys[offset - EN1_PHYS] = val; |
|---|
| 436 | break; |
|---|
| 437 | case EN1_CURPAG: |
|---|
| 438 | s->curpag = val; |
|---|
| 439 | s->tainted = 1; |
|---|
| 440 | break; |
|---|
| 441 | case EN1_MULT ... EN1_MULT + 7: |
|---|
| 442 | s->mult[offset - EN1_MULT] = val; |
|---|
| 443 | break; |
|---|
| 444 | } |
|---|
| 445 | } |
|---|
| 446 | } |
|---|
| 447 | |
|---|
| 448 | static uint32_t ne2000_ioport_read(void *opaque, uint32_t addr) |
|---|
| 449 | { |
|---|
| 450 | NE2000State *s = opaque; |
|---|
| 451 | int offset, page, ret; |
|---|
| 452 | |
|---|
| 453 | addr &= 0xf; |
|---|
| 454 | if (addr == E8390_CMD) { |
|---|
| 455 | ret = s->cmd; |
|---|
| 456 | } else { |
|---|
| 457 | page = s->cmd >> 6; |
|---|
| 458 | offset = addr | (page << 4); |
|---|
| 459 | switch(offset) { |
|---|
| 460 | case EN0_TSR: |
|---|
| 461 | ret = s->tsr; |
|---|
| 462 | break; |
|---|
| 463 | case EN0_BOUNDARY: |
|---|
| 464 | ret = s->boundary; |
|---|
| 465 | break; |
|---|
| 466 | case EN0_ISR: |
|---|
| 467 | ret = s->isr; |
|---|
| 468 | break; |
|---|
| 469 | case EN0_RSARLO: |
|---|
| 470 | ret = s->rsar & 0x00ff; |
|---|
| 471 | break; |
|---|
| 472 | case EN0_RSARHI: |
|---|
| 473 | ret = s->rsar >> 8; |
|---|
| 474 | break; |
|---|
| 475 | case EN1_PHYS ... EN1_PHYS + 5: |
|---|
| 476 | ret = s->phys[offset - EN1_PHYS]; |
|---|
| 477 | break; |
|---|
| 478 | case EN1_CURPAG: |
|---|
| 479 | ret = s->curpag; |
|---|
| 480 | break; |
|---|
| 481 | case EN1_MULT ... EN1_MULT + 7: |
|---|
| 482 | ret = s->mult[offset - EN1_MULT]; |
|---|
| 483 | break; |
|---|
| 484 | case EN0_RSR: |
|---|
| 485 | ret = s->rsr; |
|---|
| 486 | break; |
|---|
| 487 | case EN2_STARTPG: |
|---|
| 488 | ret = s->start >> 8; |
|---|
| 489 | break; |
|---|
| 490 | case EN2_STOPPG: |
|---|
| 491 | ret = s->stop >> 8; |
|---|
| 492 | break; |
|---|
| 493 | case EN0_RTL8029ID0: |
|---|
| 494 | ret = 0x50; |
|---|
| 495 | break; |
|---|
| 496 | case EN0_RTL8029ID1: |
|---|
| 497 | ret = 0x43; |
|---|
| 498 | break; |
|---|
| 499 | case EN3_CONFIG0: |
|---|
| 500 | ret = 0; /* 10baseT media */ |
|---|
| 501 | break; |
|---|
| 502 | case EN3_CONFIG2: |
|---|
| 503 | ret = 0x40; /* 10baseT active */ |
|---|
| 504 | break; |
|---|
| 505 | case EN3_CONFIG3: |
|---|
| 506 | ret = 0x40; /* Full duplex */ |
|---|
| 507 | break; |
|---|
| 508 | default: |
|---|
| 509 | ret = 0x00; |
|---|
| 510 | break; |
|---|
| 511 | } |
|---|
| 512 | } |
|---|
| 513 | #ifdef DEBUG_NE2000 |
|---|
| 514 | printf("NE2000: read addr=0x%x val=%02x\n", addr, ret); |
|---|
| 515 | #endif |
|---|
| 516 | return ret; |
|---|
| 517 | } |
|---|
| 518 | |
|---|
| 519 | static inline void ne2000_mem_writeb(NE2000State *s, uint32_t addr, |
|---|
| 520 | uint32_t val) |
|---|
| 521 | { |
|---|
| 522 | if (addr < 32 || |
|---|
| 523 | (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) { |
|---|
| 524 | s->mem[addr] = val; |
|---|
| 525 | } |
|---|
| 526 | } |
|---|
| 527 | |
|---|
| 528 | static inline void ne2000_mem_writew(NE2000State *s, uint32_t addr, |
|---|
| 529 | uint32_t val) |
|---|
| 530 | { |
|---|
| 531 | addr &= ~1; /* XXX: check exact behaviour if not even */ |
|---|
| 532 | if (addr < 32 || |
|---|
| 533 | (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) { |
|---|
| 534 | *(uint16_t *)(s->mem + addr) = cpu_to_le16(val); |
|---|
| 535 | } |
|---|
| 536 | } |
|---|
| 537 | |
|---|
| 538 | static inline void ne2000_mem_writel(NE2000State *s, uint32_t addr, |
|---|
| 539 | uint32_t val) |
|---|
| 540 | { |
|---|
| 541 | addr &= ~1; /* XXX: check exact behaviour if not even */ |
|---|
| 542 | if (addr < 32 || |
|---|
| 543 | (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE - 2)) { |
|---|
| 544 | cpu_to_le32wu((uint32_t *)(s->mem + addr), val); |
|---|
| 545 | } |
|---|
| 546 | } |
|---|
| 547 | |
|---|
| 548 | static inline uint32_t ne2000_mem_readb(NE2000State *s, uint32_t addr) |
|---|
| 549 | { |
|---|
| 550 | if (addr < 32 || |
|---|
| 551 | (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) { |
|---|
| 552 | return s->mem[addr]; |
|---|
| 553 | } else { |
|---|
| 554 | return 0xff; |
|---|
| 555 | } |
|---|
| 556 | } |
|---|
| 557 | |
|---|
| 558 | static inline uint32_t ne2000_mem_readw(NE2000State *s, uint32_t addr) |
|---|
| 559 | { |
|---|
| 560 | addr &= ~1; /* XXX: check exact behaviour if not even */ |
|---|
| 561 | if (addr < 32 || |
|---|
| 562 | (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) { |
|---|
| 563 | return le16_to_cpu(*(uint16_t *)(s->mem + addr)); |
|---|
| 564 | } else { |
|---|
| 565 | return 0xffff; |
|---|
| 566 | } |
|---|
| 567 | } |
|---|
| 568 | |
|---|
| 569 | static inline uint32_t ne2000_mem_readl(NE2000State *s, uint32_t addr) |
|---|
| 570 | { |
|---|
| 571 | addr &= ~1; /* XXX: check exact behaviour if not even */ |
|---|
| 572 | if (addr < 32 || |
|---|
| 573 | (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE - 2)) { |
|---|
| 574 | return le32_to_cpupu((uint32_t *)(s->mem + addr)); |
|---|
| 575 | } else { |
|---|
| 576 | return 0xffffffff; |
|---|
| 577 | } |
|---|
| 578 | } |
|---|
| 579 | |
|---|
| 580 | static inline void ne2000_dma_update(NE2000State *s, int len) |
|---|
| 581 | { |
|---|
| 582 | s->rsar += len; |
|---|
| 583 | /* wrap */ |
|---|
| 584 | /* XXX: check what to do if rsar > stop */ |
|---|
| 585 | if (s->rsar == s->stop) |
|---|
| 586 | s->rsar = s->start; |
|---|
| 587 | |
|---|
| 588 | if (s->rcnt <= len) { |
|---|
| 589 | s->rcnt = 0; |
|---|
| 590 | /* signal end of transfert */ |
|---|
| 591 | s->isr |= ENISR_RDC; |
|---|
| 592 | ne2000_update_irq(s); |
|---|
| 593 | } else { |
|---|
| 594 | s->rcnt -= len; |
|---|
| 595 | } |
|---|
| 596 | } |
|---|
| 597 | |
|---|
| 598 | static void ne2000_asic_ioport_write(void *opaque, uint32_t addr, uint32_t val) |
|---|
| 599 | { |
|---|
| 600 | NE2000State *s = opaque; |
|---|
| 601 | |
|---|
| 602 | #ifdef DEBUG_NE2000 |
|---|
| 603 | printf("NE2000: asic write val=0x%04x\n", val); |
|---|
| 604 | #endif |
|---|
| 605 | if (s->rcnt == 0) |
|---|
| 606 | return; |
|---|
| 607 | if (s->dcfg & 0x01) { |
|---|
| 608 | /* 16 bit access */ |
|---|
| 609 | ne2000_mem_writew(s, s->rsar, val); |
|---|
| 610 | ne2000_dma_update(s, 2); |
|---|
| 611 | } else { |
|---|
| 612 | /* 8 bit access */ |
|---|
| 613 | ne2000_mem_writeb(s, s->rsar, val); |
|---|
| 614 | ne2000_dma_update(s, 1); |
|---|
| 615 | } |
|---|
| 616 | } |
|---|
| 617 | |
|---|
| 618 | static uint32_t ne2000_asic_ioport_read(void *opaque, uint32_t addr) |
|---|
| 619 | { |
|---|
| 620 | NE2000State *s = opaque; |
|---|
| 621 | int ret; |
|---|
| 622 | |
|---|
| 623 | if (s->dcfg & 0x01) { |
|---|
| 624 | /* 16 bit access */ |
|---|
| 625 | ret = ne2000_mem_readw(s, s->rsar); |
|---|
| 626 | ne2000_dma_update(s, 2); |
|---|
| 627 | } else { |
|---|
| 628 | /* 8 bit access */ |
|---|
| 629 | ret = ne2000_mem_readb(s, s->rsar); |
|---|
| 630 | ne2000_dma_update(s, 1); |
|---|
| 631 | } |
|---|
| 632 | #ifdef DEBUG_NE2000 |
|---|
| 633 | printf("NE2000: asic read val=0x%04x\n", ret); |
|---|
| 634 | #endif |
|---|
| 635 | return ret; |
|---|
| 636 | } |
|---|
| 637 | |
|---|
| 638 | static void ne2000_asic_ioport_writel(void *opaque, uint32_t addr, uint32_t val) |
|---|
| 639 | { |
|---|
| 640 | NE2000State *s = opaque; |
|---|
| 641 | |
|---|
| 642 | #ifdef DEBUG_NE2000 |
|---|
| 643 | printf("NE2000: asic writel val=0x%04x\n", val); |
|---|
| 644 | #endif |
|---|
| 645 | if (s->rcnt == 0) |
|---|
| 646 | return; |
|---|
| 647 | /* 32 bit access */ |
|---|
| 648 | ne2000_mem_writel(s, s->rsar, val); |
|---|
| 649 | ne2000_dma_update(s, 4); |
|---|
| 650 | } |
|---|
| 651 | |
|---|
| 652 | static uint32_t ne2000_asic_ioport_readl(void *opaque, uint32_t addr) |
|---|
| 653 | { |
|---|
| 654 | NE2000State *s = opaque; |
|---|
| 655 | int ret; |
|---|
| 656 | |
|---|
| 657 | /* 32 bit access */ |
|---|
| 658 | ret = ne2000_mem_readl(s, s->rsar); |
|---|
| 659 | ne2000_dma_update(s, 4); |
|---|
| 660 | #ifdef DEBUG_NE2000 |
|---|
| 661 | printf("NE2000: asic readl val=0x%04x\n", ret); |
|---|
| 662 | #endif |
|---|
| 663 | return ret; |
|---|
| 664 | } |
|---|
| 665 | |
|---|
| 666 | static void ne2000_reset_ioport_write(void *opaque, uint32_t addr, uint32_t val) |
|---|
| 667 | { |
|---|
| 668 | /* nothing to do (end of reset pulse) */ |
|---|
| 669 | } |
|---|
| 670 | |
|---|
| 671 | static uint32_t ne2000_reset_ioport_read(void *opaque, uint32_t addr) |
|---|
| 672 | { |
|---|
| 673 | NE2000State *s = opaque; |
|---|
| 674 | ne2000_reset(s); |
|---|
| 675 | return 0; |
|---|
| 676 | } |
|---|
| 677 | |
|---|
| 678 | static void ne2000_save(QEMUFile* f,void* opaque) |
|---|
| 679 | { |
|---|
| 680 | NE2000State* s=(NE2000State*)opaque; |
|---|
| 681 | |
|---|
| 682 | qemu_put_8s(f, &s->rxcr); |
|---|
| 683 | |
|---|
| 684 | qemu_put_8s(f, &s->cmd); |
|---|
| 685 | qemu_put_be32s(f, &s->start); |
|---|
| 686 | qemu_put_be32s(f, &s->stop); |
|---|
| 687 | qemu_put_8s(f, &s->boundary); |
|---|
| 688 | qemu_put_8s(f, &s->tsr); |
|---|
| 689 | qemu_put_8s(f, &s->tpsr); |
|---|
| 690 | qemu_put_be16s(f, &s->tcnt); |
|---|
| 691 | qemu_put_be16s(f, &s->rcnt); |
|---|
| 692 | qemu_put_be32s(f, &s->rsar); |
|---|
| 693 | qemu_put_8s(f, &s->rsr); |
|---|
| 694 | qemu_put_8s(f, &s->isr); |
|---|
| 695 | qemu_put_8s(f, &s->dcfg); |
|---|
| 696 | qemu_put_8s(f, &s->imr); |
|---|
| 697 | qemu_put_buffer(f, s->phys, 6); |
|---|
| 698 | qemu_put_8s(f, &s->curpag); |
|---|
| 699 | qemu_put_buffer(f, s->mult, 8); |
|---|
| 700 | qemu_put_be32s(f, &s->irq); |
|---|
| 701 | qemu_put_buffer(f, s->mem, NE2000_MEM_SIZE); |
|---|
| 702 | } |
|---|
| 703 | |
|---|
| 704 | static int ne2000_load(QEMUFile* f,void* opaque,int version_id) |
|---|
| 705 | { |
|---|
| 706 | NE2000State* s=(NE2000State*)opaque; |
|---|
| 707 | |
|---|
| 708 | if (version_id == 2) { |
|---|
| 709 | qemu_get_8s(f, &s->rxcr); |
|---|
| 710 | } else if (version_id == 1) { |
|---|
| 711 | s->rxcr = 0x0c; |
|---|
| 712 | } else { |
|---|
| 713 | return -EINVAL; |
|---|
| 714 | } |
|---|
| 715 | |
|---|
| 716 | qemu_get_8s(f, &s->cmd); |
|---|
| 717 | qemu_get_be32s(f, &s->start); |
|---|
| 718 | qemu_get_be32s(f, &s->stop); |
|---|
| 719 | qemu_get_8s(f, &s->boundary); |
|---|
| 720 | qemu_get_8s(f, &s->tsr); |
|---|
| 721 | qemu_get_8s(f, &s->tpsr); |
|---|
| 722 | qemu_get_be16s(f, &s->tcnt); |
|---|
| 723 | qemu_get_be16s(f, &s->rcnt); |
|---|
| 724 | qemu_get_be32s(f, &s->rsar); |
|---|
| 725 | qemu_get_8s(f, &s->rsr); |
|---|
| 726 | qemu_get_8s(f, &s->isr); |
|---|
| 727 | qemu_get_8s(f, &s->dcfg); |
|---|
| 728 | qemu_get_8s(f, &s->imr); |
|---|
| 729 | qemu_get_buffer(f, s->phys, 6); |
|---|
| 730 | qemu_get_8s(f, &s->curpag); |
|---|
| 731 | qemu_get_buffer(f, s->mult, 8); |
|---|
| 732 | qemu_get_be32s(f, &s->irq); |
|---|
| 733 | qemu_get_buffer(f, s->mem, NE2000_MEM_SIZE); |
|---|
| 734 | |
|---|
| 735 | return 0; |
|---|
| 736 | } |
|---|
| 737 | |
|---|
| 738 | void isa_ne2000_init(int base, int irq, NICInfo *nd) |
|---|
| 739 | { |
|---|
| 740 | NE2000State *s; |
|---|
| 741 | |
|---|
| 742 | s = qemu_mallocz(sizeof(NE2000State)); |
|---|
| 743 | if (!s) |
|---|
| 744 | return; |
|---|
| 745 | |
|---|
| 746 | register_ioport_write(base, 16, 1, ne2000_ioport_write, s); |
|---|
| 747 | register_ioport_read(base, 16, 1, ne2000_ioport_read, s); |
|---|
| 748 | |
|---|
| 749 | register_ioport_write(base + 0x10, 1, 1, ne2000_asic_ioport_write, s); |
|---|
| 750 | register_ioport_read(base + 0x10, 1, 1, ne2000_asic_ioport_read, s); |
|---|
| 751 | register_ioport_write(base + 0x10, 2, 2, ne2000_asic_ioport_write, s); |
|---|
| 752 | register_ioport_read(base + 0x10, 2, 2, ne2000_asic_ioport_read, s); |
|---|
| 753 | |
|---|
| 754 | register_ioport_write(base + 0x1f, 1, 1, ne2000_reset_ioport_write, s); |
|---|
| 755 | register_ioport_read(base + 0x1f, 1, 1, ne2000_reset_ioport_read, s); |
|---|
| 756 | s->irq = irq; |
|---|
| 757 | memcpy(s->macaddr, nd->macaddr, 6); |
|---|
| 758 | |
|---|
| 759 | ne2000_reset(s); |
|---|
| 760 | |
|---|
| 761 | s->vc = qemu_new_vlan_client(nd->vlan, ne2000_receive, |
|---|
| 762 | ne2000_can_receive, s); |
|---|
| 763 | |
|---|
| 764 | snprintf(s->vc->info_str, sizeof(s->vc->info_str), |
|---|
| 765 | "ne2000 macaddr=%02x:%02x:%02x:%02x:%02x:%02x", |
|---|
| 766 | s->macaddr[0], |
|---|
| 767 | s->macaddr[1], |
|---|
| 768 | s->macaddr[2], |
|---|
| 769 | s->macaddr[3], |
|---|
| 770 | s->macaddr[4], |
|---|
| 771 | s->macaddr[5]); |
|---|
| 772 | |
|---|
| 773 | register_savevm("ne2000", base, 2, ne2000_save, ne2000_load, s); |
|---|
| 774 | } |
|---|
| 775 | |
|---|
| 776 | /***********************************************************/ |
|---|
| 777 | /* PCI NE2000 definitions */ |
|---|
| 778 | |
|---|
| 779 | typedef struct PCINE2000State { |
|---|
| 780 | PCIDevice dev; |
|---|
| 781 | NE2000State ne2000; |
|---|
| 782 | } PCINE2000State; |
|---|
| 783 | |
|---|
| 784 | static void ne2000_map(PCIDevice *pci_dev, int region_num, |
|---|
| 785 | uint32_t addr, uint32_t size, int type) |
|---|
| 786 | { |
|---|
| 787 | PCINE2000State *d = (PCINE2000State *)pci_dev; |
|---|
| 788 | NE2000State *s = &d->ne2000; |
|---|
| 789 | |
|---|
| 790 | register_ioport_write(addr, 16, 1, ne2000_ioport_write, s); |
|---|
| 791 | register_ioport_read(addr, 16, 1, ne2000_ioport_read, s); |
|---|
| 792 | |
|---|
| 793 | register_ioport_write(addr + 0x10, 1, 1, ne2000_asic_ioport_write, s); |
|---|
| 794 | register_ioport_read(addr + 0x10, 1, 1, ne2000_asic_ioport_read, s); |
|---|
| 795 | register_ioport_write(addr + 0x10, 2, 2, ne2000_asic_ioport_write, s); |
|---|
| 796 | register_ioport_read(addr + 0x10, 2, 2, ne2000_asic_ioport_read, s); |
|---|
| 797 | register_ioport_write(addr + 0x10, 4, 4, ne2000_asic_ioport_writel, s); |
|---|
| 798 | register_ioport_read(addr + 0x10, 4, 4, ne2000_asic_ioport_readl, s); |
|---|
| 799 | |
|---|
| 800 | register_ioport_write(addr + 0x1f, 1, 1, ne2000_reset_ioport_write, s); |
|---|
| 801 | register_ioport_read(addr + 0x1f, 1, 1, ne2000_reset_ioport_read, s); |
|---|
| 802 | } |
|---|
| 803 | |
|---|
| 804 | void pci_ne2000_init(PCIBus *bus, NICInfo *nd) |
|---|
| 805 | { |
|---|
| 806 | PCINE2000State *d; |
|---|
| 807 | NE2000State *s; |
|---|
| 808 | uint8_t *pci_conf; |
|---|
| 809 | int instance; |
|---|
| 810 | |
|---|
| 811 | d = (PCINE2000State *)pci_register_device(bus, |
|---|
| 812 | "NE2000", sizeof(PCINE2000State), |
|---|
| 813 | -1, |
|---|
| 814 | NULL, NULL); |
|---|
| 815 | pci_conf = d->dev.config; |
|---|
| 816 | pci_conf[0x00] = 0xec; // Realtek 8029 |
|---|
| 817 | pci_conf[0x01] = 0x10; |
|---|
| 818 | pci_conf[0x02] = 0x29; |
|---|
| 819 | pci_conf[0x03] = 0x80; |
|---|
| 820 | pci_conf[0x0a] = 0x00; // ethernet network controller |
|---|
| 821 | pci_conf[0x0b] = 0x02; |
|---|
| 822 | pci_conf[0x0e] = 0x00; // header_type |
|---|
| 823 | pci_conf[0x3d] = 1; // interrupt pin 0 |
|---|
| 824 | |
|---|
| 825 | pci_register_io_region(&d->dev, 0, 0x100, |
|---|
| 826 | PCI_ADDRESS_SPACE_IO, ne2000_map); |
|---|
| 827 | s = &d->ne2000; |
|---|
| 828 | s->irq = 16; // PCI interrupt |
|---|
| 829 | s->pci_dev = (PCIDevice *)d; |
|---|
| 830 | memcpy(s->macaddr, nd->macaddr, 6); |
|---|
| 831 | ne2000_reset(s); |
|---|
| 832 | s->vc = qemu_new_vlan_client(nd->vlan, ne2000_receive, |
|---|
| 833 | ne2000_can_receive, s); |
|---|
| 834 | |
|---|
| 835 | snprintf(s->vc->info_str, sizeof(s->vc->info_str), |
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| 836 | "ne2000 pci macaddr=%02x:%02x:%02x:%02x:%02x:%02x", |
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| 837 | s->macaddr[0], |
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| 838 | s->macaddr[1], |
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| 839 | s->macaddr[2], |
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| 840 | s->macaddr[3], |
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| 841 | s->macaddr[4], |
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| 842 | s->macaddr[5]); |
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| 843 | |
|---|
| 844 | instance = pci_bus_num(bus) << 8 | s->pci_dev->devfn; |
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| 845 | register_savevm("ne2000", instance, 2, ne2000_save, ne2000_load, s); |
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| 846 | register_savevm("ne2000_pci", instance, 1, generic_pci_save, |
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| 847 | generic_pci_load, &d->dev); |
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| 848 | } |
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