set_mdic(E1000State *s, int index, uint32_t val)
{
    uint32_t data = val & E1000_MDIC_DATA_MASK;
    uint32_t addr = ((val & E1000_MDIC_REG_MASK) >> E1000_MDIC_REG_SHIFT);

    if ((val & E1000_MDIC_PHY_MASK) >> E1000_MDIC_PHY_SHIFT != 1) // phy #
        val = s->mac_reg[MDIC] | E1000_MDIC_ERROR;
    else if (val & E1000_MDIC_OP_READ) {
        DBGOUT(MDIC, "MDIC read reg 0x%x\n", addr);
        if (!(phy_regcap[addr] & PHY_R)) {
            DBGOUT(MDIC, "MDIC read reg %x unhandled\n", addr);
            val |= E1000_MDIC_ERROR;
        } else
            val = (val ^ data) | s->phy_reg[addr];
    } else if (val & E1000_MDIC_OP_WRITE) {
        DBGOUT(MDIC, "MDIC write reg 0x%x, value 0x%x\n", addr, data);
        if (!(phy_regcap[addr] & PHY_W)) {
            DBGOUT(MDIC, "MDIC write reg %x unhandled\n", addr);
            val |= E1000_MDIC_ERROR;
        } else {
            if (addr < NPHYWRITEOPS && phyreg_writeops[addr]) {
                phyreg_writeops[addr](s, index, data);
            }
            s->phy_reg[addr] = data;
        }
    }
    s->mac_reg[MDIC] = val | E1000_MDIC_READY;

    if (val & E1000_MDIC_INT_EN) {
        set_ics(s, 0, E1000_ICR_MDAC);
    }
}
set_mdic(E1000State *s, int index, uint32_t val)
{
    uint32_t data = val & E1000_MDIC_DATA_MASK;
    uint32_t addr = ((val & E1000_MDIC_REG_MASK) >> E1000_MDIC_REG_SHIFT);

    if ((val & E1000_MDIC_PHY_MASK) >> E1000_MDIC_PHY_SHIFT != 1)  
        val = s->mac_reg[MDIC] | E1000_MDIC_ERROR;
    else if (val & E1000_MDIC_OP_READ) {
        DBGOUT(MDIC, "MDIC read reg 0x%x\n", addr);
        if (!(phy_regcap[addr] & PHY_R)) {
            DBGOUT(MDIC, "MDIC read reg %x unhandled\n", addr);
            val |= E1000_MDIC_ERROR;
        } else
            val = (val ^ data) | s->phy_reg[addr];
    } else if (val & E1000_MDIC_OP_WRITE) {
        DBGOUT(MDIC, "MDIC write reg 0x%x, value 0x%x\n", addr, data);
        if (!(phy_regcap[addr] & PHY_W)) {
            DBGOUT(MDIC, "MDIC write reg %x unhandled\n", addr);
            val |= E1000_MDIC_ERROR;
        } else {
            if (addr < NPHYWRITEOPS && phyreg_writeops[addr]) {
                phyreg_writeops[addr](s, index, data);
            }
            s->phy_reg[addr] = data;
        }
    }
    s->mac_reg[MDIC] = val | E1000_MDIC_READY;

    if (val & E1000_MDIC_INT_EN) {
        set_ics(s, 0, E1000_ICR_MDAC);
    }
}