pcnet.c.svn-base

我们自己开发的一个OSEK操作系统！不知道可不可以？

        le32_to_cpus(&rmd->rbadr);
        le16_to_cpus((uint16_t *)&rmd->buf_length);
        le16_to_cpus((uint16_t *)&rmd->status);
        le32_to_cpus(&rmd->msg_length);
        le32_to_cpus(&rmd->res);
        if (BCR_SWSTYLE(s) == 3) {
            uint32_t tmp = rmd->rbadr;
            rmd->rbadr = rmd->msg_length;
            rmd->msg_length = tmp;
        }
    }
}

static inline void pcnet_rmd_store(PCNetState *s, struct pcnet_RMD *rmd,
                                   target_phys_addr_t addr)
{
    if (!BCR_SSIZE32(s)) {
        struct {
            uint32_t rbadr;
            int16_t buf_length;
            int16_t msg_length;
        } rda;
        rda.rbadr = cpu_to_le32((rmd->rbadr & 0xffffff) |
                                ((rmd->status & 0xff00) << 16));
        rda.buf_length = cpu_to_le16(rmd->buf_length);
        rda.msg_length = cpu_to_le16(rmd->msg_length);
        s->phys_mem_write(s->dma_opaque, addr, (void *)&rda, sizeof(rda), 0);
    } else {
        struct {
            uint32_t rbadr;
            int16_t buf_length;
            int16_t status;
            uint32_t msg_length;
            uint32_t res;
        } rda;
        rda.rbadr = cpu_to_le32(rmd->rbadr);
        rda.buf_length = cpu_to_le16(rmd->buf_length);
        rda.status = cpu_to_le16(rmd->status);
        rda.msg_length = cpu_to_le32(rmd->msg_length);
        rda.res = cpu_to_le32(rmd->res);
        if (BCR_SWSTYLE(s) == 3) {
            uint32_t tmp = rda.rbadr;
            rda.rbadr = rda.msg_length;
            rda.msg_length = tmp;
        }
        s->phys_mem_write(s->dma_opaque, addr, (void *)&rda, sizeof(rda), 0);
    }
}


#define TMDLOAD(TMD,ADDR) pcnet_tmd_load(s,TMD,ADDR)

#define TMDSTORE(TMD,ADDR) pcnet_tmd_store(s,TMD,ADDR)

#define RMDLOAD(RMD,ADDR) pcnet_rmd_load(s,RMD,ADDR)

#define RMDSTORE(RMD,ADDR) pcnet_rmd_store(s,RMD,ADDR)

#if 1

#define CHECK_RMD(ADDR,RES) do {                \
    struct pcnet_RMD rmd;                       \
    RMDLOAD(&rmd,(ADDR));                       \
    (RES) |= (GET_FIELD(rmd.buf_length, RMDL, ONES) != 15) \
          || (GET_FIELD(rmd.msg_length, RMDM, ZEROS) != 0); \
} while (0)

#define CHECK_TMD(ADDR,RES) do {                \
    struct pcnet_TMD tmd;                       \
    TMDLOAD(&tmd,(ADDR));                       \
    (RES) |= (GET_FIELD(tmd.length, TMDL, ONES) != 15); \
} while (0)

#else

#define CHECK_RMD(ADDR,RES) do {                \
    switch (BCR_SWSTYLE(s)) {                   \
    case 0x00:                                  \
        do {                                    \
            uint16_t rda[4];                    \
            s->phys_mem_read(s->dma_opaque, (ADDR), \
                (void *)&rda[0], sizeof(rda), 0); \
            (RES) |= (rda[2] & 0xf000)!=0xf000; \
            (RES) |= (rda[3] & 0xf000)!=0x0000; \
        } while (0);                            \
        break;                                  \
    case 0x01:                                  \
    case 0x02:                                  \
        do {                                    \
            uint32_t rda[4];                    \
            s->phys_mem_read(s->dma_opaque, (ADDR), \
                (void *)&rda[0], sizeof(rda), 0); \
            (RES) |= (rda[1] & 0x0000f000L)!=0x0000f000L; \
            (RES) |= (rda[2] & 0x0000f000L)!=0x00000000L; \
        } while (0);                            \
        break;                                  \
    case 0x03:                                  \
        do {                                    \
            uint32_t rda[4];                    \
            s->phys_mem_read(s->dma_opaque, (ADDR), \
                (void *)&rda[0], sizeof(rda), 0); \
            (RES) |= (rda[0] & 0x0000f000L)!=0x00000000L; \
            (RES) |= (rda[1] & 0x0000f000L)!=0x0000f000L; \
        } while (0);                            \
        break;                                  \
    }                                           \
} while (0)

#define CHECK_TMD(ADDR,RES) do {                \
    switch (BCR_SWSTYLE(s)) {                   \
    case 0x00:                                  \
        do {                                    \
            uint16_t xda[4];                    \
            s->phys_mem_read(s->dma_opaque, (ADDR), \
                (void *)&xda[0], sizeof(xda), 0); \
            (RES) |= (xda[2] & 0xf000)!=0xf000; \
        } while (0);                            \
        break;                                  \
    case 0x01:                                  \
    case 0x02:                                  \
    case 0x03:                                  \
        do {                                    \
            uint32_t xda[4];                    \
            s->phys_mem_read(s->dma_opaque, (ADDR), \
                (void *)&xda[0], sizeof(xda), 0); \
            (RES) |= (xda[1] & 0x0000f000L)!=0x0000f000L; \
        } while (0);                            \
        break;                                  \
    }                                           \
} while (0)

#endif

#define PRINT_PKTHDR(BUF) do {                  \
    struct qemu_ether_header *hdr = (void *)(BUF); \
    printf("packet dhost=%02x:%02x:%02x:%02x:%02x:%02x, " \
           "shost=%02x:%02x:%02x:%02x:%02x:%02x, " \
           "type=0x%04x\n",                     \
           hdr->ether_dhost[0],hdr->ether_dhost[1],hdr->ether_dhost[2], \
           hdr->ether_dhost[3],hdr->ether_dhost[4],hdr->ether_dhost[5], \
           hdr->ether_shost[0],hdr->ether_shost[1],hdr->ether_shost[2], \
           hdr->ether_shost[3],hdr->ether_shost[4],hdr->ether_shost[5], \
           be16_to_cpu(hdr->ether_type));       \
} while (0)

#define MULTICAST_FILTER_LEN 8

static inline uint32_t lnc_mchash(const uint8_t *ether_addr)
{
#define LNC_POLYNOMIAL          0xEDB88320UL
    uint32_t crc = 0xFFFFFFFF;
    int idx, bit;
    uint8_t data;

    for (idx = 0; idx < 6; idx++) {
        for (data = *ether_addr++, bit = 0; bit < MULTICAST_FILTER_LEN; bit++) {
            crc = (crc >> 1) ^ (((crc ^ data) & 1) ? LNC_POLYNOMIAL : 0);
            data >>= 1;
        }
    }
    return crc;
#undef LNC_POLYNOMIAL
}

#define CRC(crc, ch)	 (crc = (crc >> 8) ^ crctab[(crc ^ (ch)) & 0xff])

/* generated using the AUTODIN II polynomial
 *	x^32 + x^26 + x^23 + x^22 + x^16 +
 *	x^12 + x^11 + x^10 + x^8 + x^7 + x^5 + x^4 + x^2 + x^1 + 1
 */
static const uint32_t crctab[256] = {
	0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
	0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
	0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
	0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
	0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
	0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
	0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
	0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
	0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
	0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
	0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
	0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
	0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
	0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
	0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
	0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
	0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
	0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
	0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
	0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
	0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
	0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
	0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
	0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
	0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
	0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
	0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
	0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
	0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
	0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
	0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
	0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
	0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
	0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
	0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
	0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
	0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
	0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
	0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
	0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
	0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
	0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
	0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
	0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
	0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
	0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
	0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
	0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
	0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
	0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
	0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
	0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
	0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
	0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
	0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
	0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
	0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
	0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
	0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
	0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
	0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
	0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
	0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
	0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
};

static inline int padr_match(PCNetState *s, const uint8_t *buf, int size)
{
    struct qemu_ether_header *hdr = (void *)buf;
    uint8_t padr[6] = {
        s->csr[12] & 0xff, s->csr[12] >> 8,
        s->csr[13] & 0xff, s->csr[13] >> 8,
        s->csr[14] & 0xff, s->csr[14] >> 8
    };
    int result = (!CSR_DRCVPA(s)) && !memcmp(hdr->ether_dhost, padr, 6);
#ifdef PCNET_DEBUG_MATCH
    printf("packet dhost=%02x:%02x:%02x:%02x:%02x:%02x, "
           "padr=%02x:%02x:%02x:%02x:%02x:%02x\n",
           hdr->ether_dhost[0],hdr->ether_dhost[1],hdr->ether_dhost[2],
           hdr->ether_dhost[3],hdr->ether_dhost[4],hdr->ether_dhost[5],
           padr[0],padr[1],padr[2],padr[3],padr[4],padr[5]);
    printf("padr_match result=%d\n", result);
#endif
    return result;
}

static inline int padr_bcast(PCNetState *s, const uint8_t *buf, int size)
{
    static const uint8_t BCAST[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
    struct qemu_ether_header *hdr = (void *)buf;
    int result = !CSR_DRCVBC(s) && !memcmp(hdr->ether_dhost, BCAST, 6);
#ifdef PCNET_DEBUG_MATCH
    printf("padr_bcast result=%d\n", result);
#endif
    return result;
}

static inline int ladr_match(PCNetState *s, const uint8_t *buf, int size)
{
    struct qemu_ether_header *hdr = (void *)buf;
    if ((*(hdr->ether_dhost)&0x01) &&
        ((uint64_t *)&s->csr[8])[0] != 0LL) {
        uint8_t ladr[8] = {
            s->csr[8] & 0xff, s->csr[8] >> 8,
            s->csr[9] & 0xff, s->csr[9] >> 8,
            s->csr[10] & 0xff, s->csr[10] >> 8,
            s->csr[11] & 0xff, s->csr[11] >> 8
        };
        int index = lnc_mchash(hdr->ether_dhost) >> 26;
        return !!(ladr[index >> 3] & (1 << (index & 7)));
    }
    return 0;
}

static inline target_phys_addr_t pcnet_rdra_addr(PCNetState *s, int idx)
{
    while (idx < 1) idx += CSR_RCVRL(s);
    return s->rdra + ((CSR_RCVRL(s) - idx) * (BCR_SWSTYLE(s) ? 16 : 8));
}

static inline int64_t pcnet_get_next_poll_time(PCNetState *s, int64_t current_time)
{
    int64_t next_time = current_time +
        muldiv64(65536 - (CSR_SPND(s) ? 0 : CSR_POLL(s)),
                 ticks_per_sec, 33000000L);
    if (next_time <= current_time)
        next_time = current_time + 1;
    return next_time;
}

static void pcnet_poll(PCNetState *s);
static void pcnet_poll_timer(void *opaque);

static uint32_t pcnet_csr_readw(PCNetState *s, uint32_t rap);
static void pcnet_csr_writew(PCNetState *s, uint32_t rap, uint32_t new_value);
static void pcnet_bcr_writew(PCNetState *s, uint32_t rap, uint32_t val);
static uint32_t pcnet_bcr_readw(PCNetState *s, uint32_t rap);

static void pcnet_s_reset(PCNetState *s)
{
#ifdef PCNET_DEBUG
    printf("pcnet_s_reset\n");
#endif

    s->lnkst = 0x40;
    s->rdra = 0;
    s->tdra = 0;
    s->rap = 0;

    s->bcr[BCR_BSBC] &= ~0x0080;

    s->csr[0]   = 0x0004;
    s->csr[3]   = 0x0000;
    s->csr[4]   = 0x0115;
    s->csr[5]   = 0x0000;
    s->csr[6]   = 0x0000;
    s->csr[8]   = 0;
    s->csr[9]   = 0;
    s->csr[10]  = 0;
    s->csr[11]  = 0;
    s->csr[12]  = le16_to_cpu(((uint16_t *)&s->prom[0])[0]);
    s->csr[13]  = le16_to_cpu(((uint16_t *)&s->prom[0])[1]);
    s->csr[14]  = le16_to_cpu(((uint16_t *)&s->prom[0])[2]);
    s->csr[15] &= 0x21c4;
    s->csr[72]  = 1;
    s->csr[74]  = 1;
    s->csr[76]  = 1;
    s->csr[78]  = 1;
    s->csr[80]  = 0x1410;
    s->csr[88]  = 0x1003;
    s->csr[89]  = 0x0262;
    s->csr[94]  = 0x0000;
    s->csr[100] = 0x0200;
    s->csr[103] = 0x0105;
    s->csr[103] = 0x0105;
    s->csr[112] = 0x0000;
    s->csr[114] = 0x0000;
    s->csr[122] = 0x0000;
    s->csr[124] = 0x0000;

    s->tx_busy = 0;
}

static void pcnet_update_irq(PCNetState *s)
{
    int isr = 0;
    s->csr[0] &= ~0x0080;

#if 1
    if (((s->csr[0] & ~s->csr[3]) & 0x5f00) ||
        (((s->csr[4]>>1) & ~s->csr[4]) & 0x0115) ||
        (((s->csr[5]>>1) & s->csr[5]) & 0x0048))
#else
    if ((!(s->csr[3] & 0x4000) && !!(s->csr[0] & 0x4000)) /* BABL */ ||
        (!(s->csr[3] & 0x1000) && !!(s->csr[0] & 0x1000)) /* MISS */ ||
        (!(s->csr[3] & 0x0100) && !!(s->csr[0] & 0x0100)) /* IDON */ ||
        (!(s->csr[3] & 0x0200) && !!(s->csr[0] & 0x0200)) /* TINT */ ||
        (!(s->csr[3] & 0x0400) && !!(s->csr[0] & 0x0400)) /* RINT */ ||
        (!(s->csr[3] & 0x0800) && !!(s->csr[0] & 0x0800)) /* MERR */ ||
        (!(s->csr[4] & 0x0001) && !!(s->csr[4] & 0x0002)) /* JAB */ ||
        (!(s->csr[4] & 0x0004) && !!(s->csr[4] & 0x0008)) /* TXSTRT */ ||
        (!(s->csr[4] & 0x0010) && !!(s->csr[4] & 0x0020)) /* RCVO */ ||
        (!(s->csr[4] & 0x0100) && !!(s->csr[4] & 0x0200)) /* MFCO */ ||
        (!!(s->csr[5] & 0x0040) && !!(s->csr[5] & 0x0080)) /* EXDINT */ ||
        (!!(s->csr[5] & 0x0008) && !!(s->csr[5] & 0x0010)) /* MPINT */)
#endif
    {

        isr = CSR_INEA(s);
        s->csr[0] |= 0x0080;
    }

    if (!!(s->csr[4] & 0x0080) && CSR_INEA(s)) { /* UINT */
        s->csr[4] &= ~0x0080;
        s->csr[4] |= 0x0040;
        s->csr[0] |= 0x0080;
        isr = 1;
#ifdef PCNET_DEBUG
        printf("pcnet user int\n");
#endif
    }

#if 1
    if (((s->csr[5]>>1) & s->csr[5]) & 0x0500)
#else
    if ((!!(s->csr[5] & 0x0400) && !!(s->csr[5] & 0x0800)) /* SINT */ ||
        (!!(s->csr[5] & 0x0100) && !!(s->csr[5] & 0x0200)) /* SLPINT */ )
#endif
    {
        isr = 1;
        s->csr[0] |= 0x0080;
    }

    if (isr != s->isr) {
#ifdef PCNET_DEBUG
        printf("pcnet: INTA=%d\n", isr);
#endif
    }
    qemu_set_irq(s->irq, isr);
    s->isr = isr;
}

static void pcnet_init(PCNetState *s)
{
    int rlen, tlen;
    uint16_t padr[3], ladrf[4], mode;