Merge "Adding qemu as a submodule of KVMFORNFV"

1 files changed, 0 insertions, 966 deletions

diff --git a/qemu/hw/char/serial.c b/qemu/hw/char/serial.c
deleted file mode 100644
index 6d815b5c6..000000000
--- a/qemu/hw/char/serial.c
+++ /dev/null
@@ -1,966 +0,0 @@
-/*
- * QEMU 16550A UART emulation
- *
- * Copyright (c) 2003-2004 Fabrice Bellard
- * Copyright (c) 2008 Citrix Systems, Inc.
- *
- * 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 "hw/char/serial.h"
-#include "sysemu/char.h"
-#include "qapi/error.h"
-#include "qemu/timer.h"
-#include "exec/address-spaces.h"
-#include "qemu/error-report.h"
-
-//#define DEBUG_SERIAL
-
-#define UART_LCR_DLAB	0x80	/* Divisor latch access bit */
-
-#define UART_IER_MSI	0x08	/* Enable Modem status interrupt */
-#define UART_IER_RLSI	0x04	/* Enable receiver line status interrupt */
-#define UART_IER_THRI	0x02	/* Enable Transmitter holding register int. */
-#define UART_IER_RDI	0x01	/* Enable receiver data interrupt */
-
-#define UART_IIR_NO_INT	0x01	/* No interrupts pending */
-#define UART_IIR_ID	0x06	/* Mask for the interrupt ID */
-
-#define UART_IIR_MSI	0x00	/* Modem status interrupt */
-#define UART_IIR_THRI	0x02	/* Transmitter holding register empty */
-#define UART_IIR_RDI	0x04	/* Receiver data interrupt */
-#define UART_IIR_RLSI	0x06	/* Receiver line status interrupt */
-#define UART_IIR_CTI    0x0C    /* Character Timeout Indication */
-
-#define UART_IIR_FENF   0x80    /* Fifo enabled, but not functionning */
-#define UART_IIR_FE     0xC0    /* Fifo enabled */
-
-/*
- * These are the definitions for the Modem Control Register
- */
-#define UART_MCR_LOOP	0x10	/* Enable loopback test mode */
-#define UART_MCR_OUT2	0x08	/* Out2 complement */
-#define UART_MCR_OUT1	0x04	/* Out1 complement */
-#define UART_MCR_RTS	0x02	/* RTS complement */
-#define UART_MCR_DTR	0x01	/* DTR complement */
-
-/*
- * These are the definitions for the Modem Status Register
- */
-#define UART_MSR_DCD	0x80	/* Data Carrier Detect */
-#define UART_MSR_RI	0x40	/* Ring Indicator */
-#define UART_MSR_DSR	0x20	/* Data Set Ready */
-#define UART_MSR_CTS	0x10	/* Clear to Send */
-#define UART_MSR_DDCD	0x08	/* Delta DCD */
-#define UART_MSR_TERI	0x04	/* Trailing edge ring indicator */
-#define UART_MSR_DDSR	0x02	/* Delta DSR */
-#define UART_MSR_DCTS	0x01	/* Delta CTS */
-#define UART_MSR_ANY_DELTA 0x0F	/* Any of the delta bits! */
-
-#define UART_LSR_TEMT	0x40	/* Transmitter empty */
-#define UART_LSR_THRE	0x20	/* Transmit-hold-register empty */
-#define UART_LSR_BI	0x10	/* Break interrupt indicator */
-#define UART_LSR_FE	0x08	/* Frame error indicator */
-#define UART_LSR_PE	0x04	/* Parity error indicator */
-#define UART_LSR_OE	0x02	/* Overrun error indicator */
-#define UART_LSR_DR	0x01	/* Receiver data ready */
-#define UART_LSR_INT_ANY 0x1E	/* Any of the lsr-interrupt-triggering status bits */
-
-/* Interrupt trigger levels. The byte-counts are for 16550A - in newer UARTs the byte-count for each ITL is higher. */
-
-#define UART_FCR_ITL_1      0x00 /* 1 byte ITL */
-#define UART_FCR_ITL_2      0x40 /* 4 bytes ITL */
-#define UART_FCR_ITL_3      0x80 /* 8 bytes ITL */
-#define UART_FCR_ITL_4      0xC0 /* 14 bytes ITL */
-
-#define UART_FCR_DMS        0x08    /* DMA Mode Select */
-#define UART_FCR_XFR        0x04    /* XMIT Fifo Reset */
-#define UART_FCR_RFR        0x02    /* RCVR Fifo Reset */
-#define UART_FCR_FE         0x01    /* FIFO Enable */
-
-#define MAX_XMIT_RETRY      4
-
-#ifdef DEBUG_SERIAL
-#define DPRINTF(fmt, ...) \
-do { fprintf(stderr, "serial: " fmt , ## __VA_ARGS__); } while (0)
-#else
-#define DPRINTF(fmt, ...) \
-do {} while (0)
-#endif
-
-static void serial_receive1(void *opaque, const uint8_t *buf, int size);
-
-static inline void recv_fifo_put(SerialState *s, uint8_t chr)
-{
-    /* Receive overruns do not overwrite FIFO contents. */
-    if (!fifo8_is_full(&s->recv_fifo)) {
-        fifo8_push(&s->recv_fifo, chr);
-    } else {
-        s->lsr |= UART_LSR_OE;
-    }
-}
-
-static void serial_update_irq(SerialState *s)
-{
-    uint8_t tmp_iir = UART_IIR_NO_INT;
-
-    if ((s->ier & UART_IER_RLSI) && (s->lsr & UART_LSR_INT_ANY)) {
-        tmp_iir = UART_IIR_RLSI;
-    } else if ((s->ier & UART_IER_RDI) && s->timeout_ipending) {
-        /* Note that(s->ier & UART_IER_RDI) can mask this interrupt,
-         * this is not in the specification but is observed on existing
-         * hardware.  */
-        tmp_iir = UART_IIR_CTI;
-    } else if ((s->ier & UART_IER_RDI) && (s->lsr & UART_LSR_DR) &&
-               (!(s->fcr & UART_FCR_FE) ||
-                s->recv_fifo.num >= s->recv_fifo_itl)) {
-        tmp_iir = UART_IIR_RDI;
-    } else if ((s->ier & UART_IER_THRI) && s->thr_ipending) {
-        tmp_iir = UART_IIR_THRI;
-    } else if ((s->ier & UART_IER_MSI) && (s->msr & UART_MSR_ANY_DELTA)) {
-        tmp_iir = UART_IIR_MSI;
-    }
-
-    s->iir = tmp_iir | (s->iir & 0xF0);
-
-    if (tmp_iir != UART_IIR_NO_INT) {
-        qemu_irq_raise(s->irq);
-    } else {
-        qemu_irq_lower(s->irq);
-    }
-}
-
-static void serial_update_parameters(SerialState *s)
-{
-    int speed, parity, data_bits, stop_bits, frame_size;
-    QEMUSerialSetParams ssp;
-
-    if (s->divider == 0)
-        return;
-
-    /* Start bit. */
-    frame_size = 1;
-    if (s->lcr & 0x08) {
-        /* Parity bit. */
-        frame_size++;
-        if (s->lcr & 0x10)
-            parity = 'E';
-        else
-            parity = 'O';
-    } else {
-            parity = 'N';
-    }
-    if (s->lcr & 0x04)
-        stop_bits = 2;
-    else
-        stop_bits = 1;
-
-    data_bits = (s->lcr & 0x03) + 5;
-    frame_size += data_bits + stop_bits;
-    speed = s->baudbase / s->divider;
-    ssp.speed = speed;
-    ssp.parity = parity;
-    ssp.data_bits = data_bits;
-    ssp.stop_bits = stop_bits;
-    s->char_transmit_time =  (NANOSECONDS_PER_SECOND / speed) * frame_size;
-    qemu_chr_fe_ioctl(s->chr, CHR_IOCTL_SERIAL_SET_PARAMS, &ssp);
-
-    DPRINTF("speed=%d parity=%c data=%d stop=%d\n",
-           speed, parity, data_bits, stop_bits);
-}
-
-static void serial_update_msl(SerialState *s)
-{
-    uint8_t omsr;
-    int flags;
-
-    timer_del(s->modem_status_poll);
-
-    if (qemu_chr_fe_ioctl(s->chr,CHR_IOCTL_SERIAL_GET_TIOCM, &flags) == -ENOTSUP) {
-        s->poll_msl = -1;
-        return;
-    }
-
-    omsr = s->msr;
-
-    s->msr = (flags & CHR_TIOCM_CTS) ? s->msr | UART_MSR_CTS : s->msr & ~UART_MSR_CTS;
-    s->msr = (flags & CHR_TIOCM_DSR) ? s->msr | UART_MSR_DSR : s->msr & ~UART_MSR_DSR;
-    s->msr = (flags & CHR_TIOCM_CAR) ? s->msr | UART_MSR_DCD : s->msr & ~UART_MSR_DCD;
-    s->msr = (flags & CHR_TIOCM_RI) ? s->msr | UART_MSR_RI : s->msr & ~UART_MSR_RI;
-
-    if (s->msr != omsr) {
-         /* Set delta bits */
-         s->msr = s->msr | ((s->msr >> 4) ^ (omsr >> 4));
-         /* UART_MSR_TERI only if change was from 1 -> 0 */
-         if ((s->msr & UART_MSR_TERI) && !(omsr & UART_MSR_RI))
-             s->msr &= ~UART_MSR_TERI;
-         serial_update_irq(s);
-    }
-
-    /* The real 16550A apparently has a 250ns response latency to line status changes.
-       We'll be lazy and poll only every 10ms, and only poll it at all if MSI interrupts are turned on */
-
-    if (s->poll_msl) {
-        timer_mod(s->modem_status_poll, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
-                  NANOSECONDS_PER_SECOND / 100);
-    }
-}
-
-static gboolean serial_xmit(GIOChannel *chan, GIOCondition cond, void *opaque)
-{
-    SerialState *s = opaque;
-
-    do {
-        assert(!(s->lsr & UART_LSR_TEMT));
-        if (s->tsr_retry <= 0) {
-            assert(!(s->lsr & UART_LSR_THRE));
-
-            if (s->fcr & UART_FCR_FE) {
-                assert(!fifo8_is_empty(&s->xmit_fifo));
-                s->tsr = fifo8_pop(&s->xmit_fifo);
-                if (!s->xmit_fifo.num) {
-                    s->lsr |= UART_LSR_THRE;
-                }
-            } else {
-                s->tsr = s->thr;
-                s->lsr |= UART_LSR_THRE;
-            }
-            if ((s->lsr & UART_LSR_THRE) && !s->thr_ipending) {
-                s->thr_ipending = 1;
-                serial_update_irq(s);
-            }
-        }
-
-        if (s->mcr & UART_MCR_LOOP) {
-            /* in loopback mode, say that we just received a char */
-            serial_receive1(s, &s->tsr, 1);
-        } else if (qemu_chr_fe_write(s->chr, &s->tsr, 1) != 1) {
-            if (s->tsr_retry >= 0 && s->tsr_retry < MAX_XMIT_RETRY &&
-                qemu_chr_fe_add_watch(s->chr, G_IO_OUT|G_IO_HUP,
-                                      serial_xmit, s) > 0) {
-                s->tsr_retry++;
-                return FALSE;
-            }
-            s->tsr_retry = 0;
-        } else {
-            s->tsr_retry = 0;
-        }
-
-        /* Transmit another byte if it is already available. It is only
-           possible when FIFO is enabled and not empty. */
-    } while (!(s->lsr & UART_LSR_THRE));
-
-    s->last_xmit_ts = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
-    s->lsr |= UART_LSR_TEMT;
-
-    return FALSE;
-}
-
-
-/* Setter for FCR.
-   is_load flag means, that value is set while loading VM state
-   and interrupt should not be invoked */
-static void serial_write_fcr(SerialState *s, uint8_t val)
-{
-    /* Set fcr - val only has the bits that are supposed to "stick" */
-    s->fcr = val;
-
-    if (val & UART_FCR_FE) {
-        s->iir |= UART_IIR_FE;
-        /* Set recv_fifo trigger Level */
-        switch (val & 0xC0) {
-        case UART_FCR_ITL_1:
-            s->recv_fifo_itl = 1;
-            break;
-        case UART_FCR_ITL_2:
-            s->recv_fifo_itl = 4;
-            break;
-        case UART_FCR_ITL_3:
-            s->recv_fifo_itl = 8;
-            break;
-        case UART_FCR_ITL_4:
-            s->recv_fifo_itl = 14;
-            break;
-        }
-    } else {
-        s->iir &= ~UART_IIR_FE;
-    }
-}
-
-static void serial_ioport_write(void *opaque, hwaddr addr, uint64_t val,
-                                unsigned size)
-{
-    SerialState *s = opaque;
-
-    addr &= 7;
-    DPRINTF("write addr=0x%" HWADDR_PRIx " val=0x%" PRIx64 "\n", addr, val);
-    switch(addr) {
-    default:
-    case 0:
-        if (s->lcr & UART_LCR_DLAB) {
-            s->divider = (s->divider & 0xff00) | val;
-            serial_update_parameters(s);
-        } else {
-            s->thr = (uint8_t) val;
-            if(s->fcr & UART_FCR_FE) {
-                /* xmit overruns overwrite data, so make space if needed */
-                if (fifo8_is_full(&s->xmit_fifo)) {
-                    fifo8_pop(&s->xmit_fifo);
-                }
-                fifo8_push(&s->xmit_fifo, s->thr);
-            }
-            s->thr_ipending = 0;
-            s->lsr &= ~UART_LSR_THRE;
-            s->lsr &= ~UART_LSR_TEMT;
-            serial_update_irq(s);
-            if (s->tsr_retry <= 0) {
-                serial_xmit(NULL, G_IO_OUT, s);
-            }
-        }
-        break;
-    case 1:
-        if (s->lcr & UART_LCR_DLAB) {
-            s->divider = (s->divider & 0x00ff) | (val << 8);
-            serial_update_parameters(s);
-        } else {
-            uint8_t changed = (s->ier ^ val) & 0x0f;
-            s->ier = val & 0x0f;
-            /* If the backend device is a real serial port, turn polling of the modem
-             * status lines on physical port on or off depending on UART_IER_MSI state.
-             */
-            if ((changed & UART_IER_MSI) && s->poll_msl >= 0) {
-                if (s->ier & UART_IER_MSI) {
-                     s->poll_msl = 1;
-                     serial_update_msl(s);
-                } else {
-                     timer_del(s->modem_status_poll);
-                     s->poll_msl = 0;
-                }
-            }
-
-            /* Turning on the THRE interrupt on IER can trigger the interrupt
-             * if LSR.THRE=1, even if it had been masked before by reading IIR.
-             * This is not in the datasheet, but Windows relies on it.  It is
-             * unclear if THRE has to be resampled every time THRI becomes
-             * 1, or only on the rising edge.  Bochs does the latter, and Windows
-             * always toggles IER to all zeroes and back to all ones, so do the
-             * same.
-             *
-             * If IER.THRI is zero, thr_ipending is not used.  Set it to zero
-             * so that the thr_ipending subsection is not migrated.
-             */
-            if (changed & UART_IER_THRI) {
-                if ((s->ier & UART_IER_THRI) && (s->lsr & UART_LSR_THRE)) {
-                    s->thr_ipending = 1;
-                } else {
-                    s->thr_ipending = 0;
-                }
-            }
-
-            if (changed) {
-                serial_update_irq(s);
-            }
-        }
-        break;
-    case 2:
-        /* Did the enable/disable flag change? If so, make sure FIFOs get flushed */
-        if ((val ^ s->fcr) & UART_FCR_FE) {
-            val |= UART_FCR_XFR | UART_FCR_RFR;
-        }
-
-        /* FIFO clear */
-
-        if (val & UART_FCR_RFR) {
-            s->lsr &= ~(UART_LSR_DR | UART_LSR_BI);
-            timer_del(s->fifo_timeout_timer);
-            s->timeout_ipending = 0;
-            fifo8_reset(&s->recv_fifo);
-        }
-
-        if (val & UART_FCR_XFR) {
-            s->lsr |= UART_LSR_THRE;
-            s->thr_ipending = 1;
-            fifo8_reset(&s->xmit_fifo);
-        }
-
-        serial_write_fcr(s, val & 0xC9);
-        serial_update_irq(s);
-        break;
-    case 3:
-        {
-            int break_enable;
-            s->lcr = val;
-            serial_update_parameters(s);
-            break_enable = (val >> 6) & 1;
-            if (break_enable != s->last_break_enable) {
-                s->last_break_enable = break_enable;
-                qemu_chr_fe_ioctl(s->chr, CHR_IOCTL_SERIAL_SET_BREAK,
-                               &break_enable);
-            }
-        }
-        break;
-    case 4:
-        {
-            int flags;
-            int old_mcr = s->mcr;
-            s->mcr = val & 0x1f;
-            if (val & UART_MCR_LOOP)
-                break;
-
-            if (s->poll_msl >= 0 && old_mcr != s->mcr) {
-
-                qemu_chr_fe_ioctl(s->chr,CHR_IOCTL_SERIAL_GET_TIOCM, &flags);
-
-                flags &= ~(CHR_TIOCM_RTS | CHR_TIOCM_DTR);
-
-                if (val & UART_MCR_RTS)
-                    flags |= CHR_TIOCM_RTS;
-                if (val & UART_MCR_DTR)
-                    flags |= CHR_TIOCM_DTR;
-
-                qemu_chr_fe_ioctl(s->chr,CHR_IOCTL_SERIAL_SET_TIOCM, &flags);
-                /* Update the modem status after a one-character-send wait-time, since there may be a response
-                   from the device/computer at the other end of the serial line */
-                timer_mod(s->modem_status_poll, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->char_transmit_time);
-            }
-        }
-        break;
-    case 5:
-        break;
-    case 6:
-        break;
-    case 7:
-        s->scr = val;
-        break;
-    }
-}
-
-static uint64_t serial_ioport_read(void *opaque, hwaddr addr, unsigned size)
-{
-    SerialState *s = opaque;
-    uint32_t ret;
-
-    addr &= 7;
-    switch(addr) {
-    default:
-    case 0:
-        if (s->lcr & UART_LCR_DLAB) {
-            ret = s->divider & 0xff;
-        } else {
-            if(s->fcr & UART_FCR_FE) {
-                ret = fifo8_is_empty(&s->recv_fifo) ?
-                            0 : fifo8_pop(&s->recv_fifo);
-                if (s->recv_fifo.num == 0) {
-                    s->lsr &= ~(UART_LSR_DR | UART_LSR_BI);
-                } else {
-                    timer_mod(s->fifo_timeout_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->char_transmit_time * 4);
-                }
-                s->timeout_ipending = 0;
-            } else {
-                ret = s->rbr;
-                s->lsr &= ~(UART_LSR_DR | UART_LSR_BI);
-            }
-            serial_update_irq(s);
-            if (!(s->mcr & UART_MCR_LOOP)) {
-                /* in loopback mode, don't receive any data */
-                qemu_chr_accept_input(s->chr);
-            }
-        }
-        break;
-    case 1:
-        if (s->lcr & UART_LCR_DLAB) {
-            ret = (s->divider >> 8) & 0xff;
-        } else {
-            ret = s->ier;
-        }
-        break;
-    case 2:
-        ret = s->iir;
-        if ((ret & UART_IIR_ID) == UART_IIR_THRI) {
-            s->thr_ipending = 0;
-            serial_update_irq(s);
-        }
-        break;
-    case 3:
-        ret = s->lcr;
-        break;
-    case 4:
-        ret = s->mcr;
-        break;
-    case 5:
-        ret = s->lsr;
-        /* Clear break and overrun interrupts */
-        if (s->lsr & (UART_LSR_BI|UART_LSR_OE)) {
-            s->lsr &= ~(UART_LSR_BI|UART_LSR_OE);
-            serial_update_irq(s);
-        }
-        break;
-    case 6:
-        if (s->mcr & UART_MCR_LOOP) {
-            /* in loopback, the modem output pins are connected to the
-               inputs */
-            ret = (s->mcr & 0x0c) << 4;
-            ret |= (s->mcr & 0x02) << 3;
-            ret |= (s->mcr & 0x01) << 5;
-        } else {
-            if (s->poll_msl >= 0)
-                serial_update_msl(s);
-            ret = s->msr;
-            /* Clear delta bits & msr int after read, if they were set */
-            if (s->msr & UART_MSR_ANY_DELTA) {
-                s->msr &= 0xF0;
-                serial_update_irq(s);
-            }
-        }
-        break;
-    case 7:
-        ret = s->scr;
-        break;
-    }
-    DPRINTF("read addr=0x%" HWADDR_PRIx " val=0x%02x\n", addr, ret);
-    return ret;
-}
-
-static int serial_can_receive(SerialState *s)
-{
-    if(s->fcr & UART_FCR_FE) {
-        if (s->recv_fifo.num < UART_FIFO_LENGTH) {
-            /*
-             * Advertise (fifo.itl - fifo.count) bytes when count < ITL, and 1
-             * if above. If UART_FIFO_LENGTH - fifo.count is advertised the
-             * effect will be to almost always fill the fifo completely before
-             * the guest has a chance to respond, effectively overriding the ITL
-             * that the guest has set.
-             */
-            return (s->recv_fifo.num <= s->recv_fifo_itl) ?
-                        s->recv_fifo_itl - s->recv_fifo.num : 1;
-        } else {
-            return 0;
-        }
-    } else {
-        return !(s->lsr & UART_LSR_DR);
-    }
-}
-
-static void serial_receive_break(SerialState *s)
-{
-    s->rbr = 0;
-    /* When the LSR_DR is set a null byte is pushed into the fifo */
-    recv_fifo_put(s, '\0');
-    s->lsr |= UART_LSR_BI | UART_LSR_DR;
-    serial_update_irq(s);
-}
-
-/* There's data in recv_fifo and s->rbr has not been read for 4 char transmit times */
-static void fifo_timeout_int (void *opaque) {
-    SerialState *s = opaque;
-    if (s->recv_fifo.num) {
-        s->timeout_ipending = 1;
-        serial_update_irq(s);
-    }
-}
-
-static int serial_can_receive1(void *opaque)
-{
-    SerialState *s = opaque;
-    return serial_can_receive(s);
-}
-
-static void serial_receive1(void *opaque, const uint8_t *buf, int size)
-{
-    SerialState *s = opaque;
-
-    if (s->wakeup) {
-        qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
-    }
-    if(s->fcr & UART_FCR_FE) {
-        int i;
-        for (i = 0; i < size; i++) {
-            recv_fifo_put(s, buf[i]);
-        }
-        s->lsr |= UART_LSR_DR;
-        /* call the timeout receive callback in 4 char transmit time */
-        timer_mod(s->fifo_timeout_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->char_transmit_time * 4);
-    } else {
-        if (s->lsr & UART_LSR_DR)
-            s->lsr |= UART_LSR_OE;
-        s->rbr = buf[0];
-        s->lsr |= UART_LSR_DR;
-    }
-    serial_update_irq(s);
-}
-
-static void serial_event(void *opaque, int event)
-{
-    SerialState *s = opaque;
-    DPRINTF("event %x\n", event);
-    if (event == CHR_EVENT_BREAK)
-        serial_receive_break(s);
-}
-
-static void serial_pre_save(void *opaque)
-{
-    SerialState *s = opaque;
-    s->fcr_vmstate = s->fcr;
-}
-
-static int serial_pre_load(void *opaque)
-{
-    SerialState *s = opaque;
-    s->thr_ipending = -1;
-    s->poll_msl = -1;
-    return 0;
-}
-
-static int serial_post_load(void *opaque, int version_id)
-{
-    SerialState *s = opaque;
-
-    if (version_id < 3) {
-        s->fcr_vmstate = 0;
-    }
-    if (s->thr_ipending == -1) {
-        s->thr_ipending = ((s->iir & UART_IIR_ID) == UART_IIR_THRI);
-    }
-    s->last_break_enable = (s->lcr >> 6) & 1;
-    /* Initialize fcr via setter to perform essential side-effects */
-    serial_write_fcr(s, s->fcr_vmstate);
-    serial_update_parameters(s);
-    return 0;
-}
-
-static bool serial_thr_ipending_needed(void *opaque)
-{
-    SerialState *s = opaque;
-
-    if (s->ier & UART_IER_THRI) {
-        bool expected_value = ((s->iir & UART_IIR_ID) == UART_IIR_THRI);
-        return s->thr_ipending != expected_value;
-    } else {
-        /* LSR.THRE will be sampled again when the interrupt is
-         * enabled.  thr_ipending is not used in this case, do
-         * not migrate it.
-         */
-        return false;
-    }
-}
-
-static const VMStateDescription vmstate_serial_thr_ipending = {
-    .name = "serial/thr_ipending",
-    .version_id = 1,
-    .minimum_version_id = 1,
-    .needed = serial_thr_ipending_needed,
-    .fields = (VMStateField[]) {
-        VMSTATE_INT32(thr_ipending, SerialState),
-        VMSTATE_END_OF_LIST()
-    }
-};
-
-static bool serial_tsr_needed(void *opaque)
-{
-    SerialState *s = (SerialState *)opaque;
-    return s->tsr_retry != 0;
-}
-
-static const VMStateDescription vmstate_serial_tsr = {
-    .name = "serial/tsr",
-    .version_id = 1,
-    .minimum_version_id = 1,
-    .needed = serial_tsr_needed,
-    .fields = (VMStateField[]) {
-        VMSTATE_INT32(tsr_retry, SerialState),
-        VMSTATE_UINT8(thr, SerialState),
-        VMSTATE_UINT8(tsr, SerialState),
-        VMSTATE_END_OF_LIST()
-    }
-};
-
-static bool serial_recv_fifo_needed(void *opaque)
-{
-    SerialState *s = (SerialState *)opaque;
-    return !fifo8_is_empty(&s->recv_fifo);
-
-}
-
-static const VMStateDescription vmstate_serial_recv_fifo = {
-    .name = "serial/recv_fifo",
-    .version_id = 1,
-    .minimum_version_id = 1,
-    .needed = serial_recv_fifo_needed,
-    .fields = (VMStateField[]) {
-        VMSTATE_STRUCT(recv_fifo, SerialState, 1, vmstate_fifo8, Fifo8),
-        VMSTATE_END_OF_LIST()
-    }
-};
-
-static bool serial_xmit_fifo_needed(void *opaque)
-{
-    SerialState *s = (SerialState *)opaque;
-    return !fifo8_is_empty(&s->xmit_fifo);
-}
-
-static const VMStateDescription vmstate_serial_xmit_fifo = {
-    .name = "serial/xmit_fifo",
-    .version_id = 1,
-    .minimum_version_id = 1,
-    .needed = serial_xmit_fifo_needed,
-    .fields = (VMStateField[]) {
-        VMSTATE_STRUCT(xmit_fifo, SerialState, 1, vmstate_fifo8, Fifo8),
-        VMSTATE_END_OF_LIST()
-    }
-};
-
-static bool serial_fifo_timeout_timer_needed(void *opaque)
-{
-    SerialState *s = (SerialState *)opaque;
-    return timer_pending(s->fifo_timeout_timer);
-}
-
-static const VMStateDescription vmstate_serial_fifo_timeout_timer = {
-    .name = "serial/fifo_timeout_timer",
-    .version_id = 1,
-    .minimum_version_id = 1,
-    .needed = serial_fifo_timeout_timer_needed,
-    .fields = (VMStateField[]) {
-        VMSTATE_TIMER_PTR(fifo_timeout_timer, SerialState),
-        VMSTATE_END_OF_LIST()
-    }
-};
-
-static bool serial_timeout_ipending_needed(void *opaque)
-{
-    SerialState *s = (SerialState *)opaque;
-    return s->timeout_ipending != 0;
-}
-
-static const VMStateDescription vmstate_serial_timeout_ipending = {
-    .name = "serial/timeout_ipending",
-    .version_id = 1,
-    .minimum_version_id = 1,
-    .needed = serial_timeout_ipending_needed,
-    .fields = (VMStateField[]) {
-        VMSTATE_INT32(timeout_ipending, SerialState),
-        VMSTATE_END_OF_LIST()
-    }
-};
-
-static bool serial_poll_needed(void *opaque)
-{
-    SerialState *s = (SerialState *)opaque;
-    return s->poll_msl >= 0;
-}
-
-static const VMStateDescription vmstate_serial_poll = {
-    .name = "serial/poll",
-    .version_id = 1,
-    .needed = serial_poll_needed,
-    .minimum_version_id = 1,
-    .fields = (VMStateField[]) {
-        VMSTATE_INT32(poll_msl, SerialState),
-        VMSTATE_TIMER_PTR(modem_status_poll, SerialState),
-        VMSTATE_END_OF_LIST()
-    }
-};
-
-const VMStateDescription vmstate_serial = {
-    .name = "serial",
-    .version_id = 3,
-    .minimum_version_id = 2,
-    .pre_save = serial_pre_save,
-    .pre_load = serial_pre_load,
-    .post_load = serial_post_load,
-    .fields = (VMStateField[]) {
-        VMSTATE_UINT16_V(divider, SerialState, 2),
-        VMSTATE_UINT8(rbr, SerialState),
-        VMSTATE_UINT8(ier, SerialState),
-        VMSTATE_UINT8(iir, SerialState),
-        VMSTATE_UINT8(lcr, SerialState),
-        VMSTATE_UINT8(mcr, SerialState),
-        VMSTATE_UINT8(lsr, SerialState),
-        VMSTATE_UINT8(msr, SerialState),
-        VMSTATE_UINT8(scr, SerialState),
-        VMSTATE_UINT8_V(fcr_vmstate, SerialState, 3),
-        VMSTATE_END_OF_LIST()
-    },
-    .subsections = (const VMStateDescription*[]) {
-        &vmstate_serial_thr_ipending,
-        &vmstate_serial_tsr,
-        &vmstate_serial_recv_fifo,
-        &vmstate_serial_xmit_fifo,
-        &vmstate_serial_fifo_timeout_timer,
-        &vmstate_serial_timeout_ipending,
-        &vmstate_serial_poll,
-        NULL
-    }
-};
-
-static void serial_reset(void *opaque)
-{
-    SerialState *s = opaque;
-
-    s->rbr = 0;
-    s->ier = 0;
-    s->iir = UART_IIR_NO_INT;
-    s->lcr = 0;
-    s->lsr = UART_LSR_TEMT | UART_LSR_THRE;
-    s->msr = UART_MSR_DCD | UART_MSR_DSR | UART_MSR_CTS;
-    /* Default to 9600 baud, 1 start bit, 8 data bits, 1 stop bit, no parity. */
-    s->divider = 0x0C;
-    s->mcr = UART_MCR_OUT2;
-    s->scr = 0;
-    s->tsr_retry = 0;
-    s->char_transmit_time = (NANOSECONDS_PER_SECOND / 9600) * 10;
-    s->poll_msl = 0;
-
-    s->timeout_ipending = 0;
-    timer_del(s->fifo_timeout_timer);
-    timer_del(s->modem_status_poll);
-
-    fifo8_reset(&s->recv_fifo);
-    fifo8_reset(&s->xmit_fifo);
-
-    s->last_xmit_ts = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
-
-    s->thr_ipending = 0;
-    s->last_break_enable = 0;
-    qemu_irq_lower(s->irq);
-
-    serial_update_msl(s);
-    s->msr &= ~UART_MSR_ANY_DELTA;
-}
-
-void serial_realize_core(SerialState *s, Error **errp)
-{
-    if (!s->chr) {
-        error_setg(errp, "Can't create serial device, empty char device");
-        return;
-    }
-
-    s->modem_status_poll = timer_new_ns(QEMU_CLOCK_VIRTUAL, (QEMUTimerCB *) serial_update_msl, s);
-
-    s->fifo_timeout_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, (QEMUTimerCB *) fifo_timeout_int, s);
-    qemu_register_reset(serial_reset, s);
-
-    qemu_chr_add_handlers(s->chr, serial_can_receive1, serial_receive1,
-                          serial_event, s);
-    fifo8_create(&s->recv_fifo, UART_FIFO_LENGTH);
-    fifo8_create(&s->xmit_fifo, UART_FIFO_LENGTH);
-    serial_reset(s);
-}
-
-void serial_exit_core(SerialState *s)
-{
-    qemu_chr_add_handlers(s->chr, NULL, NULL, NULL, NULL);
-    qemu_unregister_reset(serial_reset, s);
-}
-
-/* Change the main reference oscillator frequency. */
-void serial_set_frequency(SerialState *s, uint32_t frequency)
-{
-    s->baudbase = frequency;
-    serial_update_parameters(s);
-}
-
-const MemoryRegionOps serial_io_ops = {
-    .read = serial_ioport_read,
-    .write = serial_ioport_write,
-    .impl = {
-        .min_access_size = 1,
-        .max_access_size = 1,
-    },
-    .endianness = DEVICE_LITTLE_ENDIAN,
-};
-
-SerialState *serial_init(int base, qemu_irq irq, int baudbase,
-                         CharDriverState *chr, MemoryRegion *system_io)
-{
-    SerialState *s;
-
-    s = g_malloc0(sizeof(SerialState));
-
-    s->irq = irq;
-    s->baudbase = baudbase;
-    s->chr = chr;
-    serial_realize_core(s, &error_fatal);
-
-    vmstate_register(NULL, base, &vmstate_serial, s);
-
-    memory_region_init_io(&s->io, NULL, &serial_io_ops, s, "serial", 8);
-    memory_region_add_subregion(system_io, base, &s->io);
-
-    return s;
-}
-
-/* Memory mapped interface */
-static uint64_t serial_mm_read(void *opaque, hwaddr addr,
-                               unsigned size)
-{
-    SerialState *s = opaque;
-    return serial_ioport_read(s, addr >> s->it_shift, 1);
-}
-
-static void serial_mm_write(void *opaque, hwaddr addr,
-                            uint64_t value, unsigned size)
-{
-    SerialState *s = opaque;
-    value &= ~0u >> (32 - (size * 8));
-    serial_ioport_write(s, addr >> s->it_shift, value, 1);
-}
-
-static const MemoryRegionOps serial_mm_ops[3] = {
-    [DEVICE_NATIVE_ENDIAN] = {
-        .read = serial_mm_read,
-        .write = serial_mm_write,
-        .endianness = DEVICE_NATIVE_ENDIAN,
-    },
-    [DEVICE_LITTLE_ENDIAN] = {
-        .read = serial_mm_read,
-        .write = serial_mm_write,
-        .endianness = DEVICE_LITTLE_ENDIAN,
-    },
-    [DEVICE_BIG_ENDIAN] = {
-        .read = serial_mm_read,
-        .write = serial_mm_write,
-        .endianness = DEVICE_BIG_ENDIAN,
-    },
-};
-
-SerialState *serial_mm_init(MemoryRegion *address_space,
-                            hwaddr base, int it_shift,
-                            qemu_irq irq, int baudbase,
-                            CharDriverState *chr, enum device_endian end)
-{
-    SerialState *s;
-
-    s = g_malloc0(sizeof(SerialState));
-
-    s->it_shift = it_shift;
-    s->irq = irq;
-    s->baudbase = baudbase;
-    s->chr = chr;
-
-    serial_realize_core(s, &error_fatal);
-    vmstate_register(NULL, base, &vmstate_serial, s);
-
-    memory_region_init_io(&s->io, NULL, &serial_mm_ops[end], s,
-                          "serial", 8 << it_shift);
-    memory_region_add_subregion(address_space, base, &s->io);
-    return s;
-}