Rename slavio_serial to escc

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6269 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 922 insertions, 0 deletions

diff --git a/hw/escc.c b/hw/escc.c
new file mode 100644
index 0000000..71d6368
--- /dev/null
+++ b/hw/escc.c
@@ -0,0 +1,922 @@
+/*
+ * QEMU Sparc SLAVIO serial port emulation
+ *
+ * Copyright (c) 2003-2005 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "hw.h"
+#include "sun4m.h"
+#include "qemu-char.h"
+#include "console.h"
+
+/* debug serial */
+//#define DEBUG_SERIAL
+
+/* debug keyboard */
+//#define DEBUG_KBD
+
+/* debug mouse */
+//#define DEBUG_MOUSE
+
+/*
+ * This is the serial port, mouse and keyboard part of chip STP2001
+ * (Slave I/O), also produced as NCR89C105. See
+ * http://www.ibiblio.org/pub/historic-linux/early-ports/Sparc/NCR/NCR89C105.txt
+ *
+ * The serial ports implement full AMD AM8530 or Zilog Z8530 chips,
+ * mouse and keyboard ports don't implement all functions and they are
+ * only asynchronous. There is no DMA.
+ *
+ */
+
+/*
+ * Modifications:
+ *  2006-Aug-10  Igor Kovalenko :   Renamed KBDQueue to SERIOQueue, implemented
+ *                                  serial mouse queue.
+ *                                  Implemented serial mouse protocol.
+ */
+
+#ifdef DEBUG_SERIAL
+#define SER_DPRINTF(fmt, args...) \
+do { printf("SER: " fmt , ##args); } while (0)
+#else
+#define SER_DPRINTF(fmt, args...)
+#endif
+#ifdef DEBUG_KBD
+#define KBD_DPRINTF(fmt, args...) \
+do { printf("KBD: " fmt , ##args); } while (0)
+#else
+#define KBD_DPRINTF(fmt, args...)
+#endif
+#ifdef DEBUG_MOUSE
+#define MS_DPRINTF(fmt, args...) \
+do { printf("MSC: " fmt , ##args); } while (0)
+#else
+#define MS_DPRINTF(fmt, args...)
+#endif
+
+typedef enum {
+    chn_a, chn_b,
+} chn_id_t;
+
+#define CHN_C(s) ((s)->chn == chn_b? 'b' : 'a')
+
+typedef enum {
+    ser, kbd, mouse,
+} chn_type_t;
+
+#define SERIO_QUEUE_SIZE 256
+
+typedef struct {
+    uint8_t data[SERIO_QUEUE_SIZE];
+    int rptr, wptr, count;
+} SERIOQueue;
+
+#define SERIAL_REGS 16
+typedef struct ChannelState {
+    qemu_irq irq;
+    uint32_t reg;
+    uint32_t rxint, txint, rxint_under_svc, txint_under_svc;
+    chn_id_t chn; // this channel, A (base+4) or B (base+0)
+    chn_type_t type;
+    struct ChannelState *otherchn;
+    uint8_t rx, tx, wregs[SERIAL_REGS], rregs[SERIAL_REGS];
+    SERIOQueue queue;
+    CharDriverState *chr;
+    int e0_mode, led_mode, caps_lock_mode, num_lock_mode;
+    int disabled;
+} ChannelState;
+
+struct SerialState {
+    struct ChannelState chn[2];
+};
+
+#define SERIAL_SIZE 8
+#define SERIAL_CTRL 0
+#define SERIAL_DATA 1
+
+#define W_CMD     0
+#define CMD_PTR_MASK   0x07
+#define CMD_CMD_MASK   0x38
+#define CMD_HI         0x08
+#define CMD_CLR_TXINT  0x28
+#define CMD_CLR_IUS    0x38
+#define W_INTR    1
+#define INTR_INTALL    0x01
+#define INTR_TXINT     0x02
+#define INTR_RXMODEMSK 0x18
+#define INTR_RXINT1ST  0x08
+#define INTR_RXINTALL  0x10
+#define W_IVEC    2
+#define W_RXCTRL  3
+#define RXCTRL_RXEN    0x01
+#define W_TXCTRL1 4
+#define TXCTRL1_PAREN  0x01
+#define TXCTRL1_PAREV  0x02
+#define TXCTRL1_1STOP  0x04
+#define TXCTRL1_1HSTOP 0x08
+#define TXCTRL1_2STOP  0x0c
+#define TXCTRL1_STPMSK 0x0c
+#define TXCTRL1_CLK1X  0x00
+#define TXCTRL1_CLK16X 0x40
+#define TXCTRL1_CLK32X 0x80
+#define TXCTRL1_CLK64X 0xc0
+#define TXCTRL1_CLKMSK 0xc0
+#define W_TXCTRL2 5
+#define TXCTRL2_TXEN   0x08
+#define TXCTRL2_BITMSK 0x60
+#define TXCTRL2_5BITS  0x00
+#define TXCTRL2_7BITS  0x20
+#define TXCTRL2_6BITS  0x40
+#define TXCTRL2_8BITS  0x60
+#define W_SYNC1   6
+#define W_SYNC2   7
+#define W_TXBUF   8
+#define W_MINTR   9
+#define MINTR_STATUSHI 0x10
+#define MINTR_RST_MASK 0xc0
+#define MINTR_RST_B    0x40
+#define MINTR_RST_A    0x80
+#define MINTR_RST_ALL  0xc0
+#define W_MISC1  10
+#define W_CLOCK  11
+#define CLOCK_TRXC     0x08
+#define W_BRGLO  12
+#define W_BRGHI  13
+#define W_MISC2  14
+#define MISC2_PLLDIS   0x30
+#define W_EXTINT 15
+#define EXTINT_DCD     0x08
+#define EXTINT_SYNCINT 0x10
+#define EXTINT_CTSINT  0x20
+#define EXTINT_TXUNDRN 0x40
+#define EXTINT_BRKINT  0x80
+
+#define R_STATUS  0
+#define STATUS_RXAV    0x01
+#define STATUS_ZERO    0x02
+#define STATUS_TXEMPTY 0x04
+#define STATUS_DCD     0x08
+#define STATUS_SYNC    0x10
+#define STATUS_CTS     0x20
+#define STATUS_TXUNDRN 0x40
+#define STATUS_BRK     0x80
+#define R_SPEC    1
+#define SPEC_ALLSENT   0x01
+#define SPEC_BITS8     0x06
+#define R_IVEC    2
+#define IVEC_TXINTB    0x00
+#define IVEC_LONOINT   0x06
+#define IVEC_LORXINTA  0x0c
+#define IVEC_LORXINTB  0x04
+#define IVEC_LOTXINTA  0x08
+#define IVEC_HINOINT   0x60
+#define IVEC_HIRXINTA  0x30
+#define IVEC_HIRXINTB  0x20
+#define IVEC_HITXINTA  0x10
+#define R_INTR    3
+#define INTR_EXTINTB   0x01
+#define INTR_TXINTB    0x02
+#define INTR_RXINTB    0x04
+#define INTR_EXTINTA   0x08
+#define INTR_TXINTA    0x10
+#define INTR_RXINTA    0x20
+#define R_IPEN    4
+#define R_TXCTRL1 5
+#define R_TXCTRL2 6
+#define R_BC      7
+#define R_RXBUF   8
+#define R_RXCTRL  9
+#define R_MISC   10
+#define R_MISC1  11
+#define R_BRGLO  12
+#define R_BRGHI  13
+#define R_MISC1I 14
+#define R_EXTINT 15
+
+static void handle_kbd_command(ChannelState *s, int val);
+static int serial_can_receive(void *opaque);
+static void serial_receive_byte(ChannelState *s, int ch);
+
+static void clear_queue(void *opaque)
+{
+    ChannelState *s = opaque;
+    SERIOQueue *q = &s->queue;
+    q->rptr = q->wptr = q->count = 0;
+}
+
+static void put_queue(void *opaque, int b)
+{
+    ChannelState *s = opaque;
+    SERIOQueue *q = &s->queue;
+
+    SER_DPRINTF("channel %c put: 0x%02x\n", CHN_C(s), b);
+    if (q->count >= SERIO_QUEUE_SIZE)
+        return;
+    q->data[q->wptr] = b;
+    if (++q->wptr == SERIO_QUEUE_SIZE)
+        q->wptr = 0;
+    q->count++;
+    serial_receive_byte(s, 0);
+}
+
+static uint32_t get_queue(void *opaque)
+{
+    ChannelState *s = opaque;
+    SERIOQueue *q = &s->queue;
+    int val;
+
+    if (q->count == 0) {
+        return 0;
+    } else {
+        val = q->data[q->rptr];
+        if (++q->rptr == SERIO_QUEUE_SIZE)
+            q->rptr = 0;
+        q->count--;
+    }
+    SER_DPRINTF("channel %c get 0x%02x\n", CHN_C(s), val);
+    if (q->count > 0)
+        serial_receive_byte(s, 0);
+    return val;
+}
+
+static int slavio_serial_update_irq_chn(ChannelState *s)
+{
+    if ((((s->wregs[W_INTR] & INTR_TXINT) && s->txint == 1) ||
+         // tx ints enabled, pending
+         ((((s->wregs[W_INTR] & INTR_RXMODEMSK) == INTR_RXINT1ST) ||
+           ((s->wregs[W_INTR] & INTR_RXMODEMSK) == INTR_RXINTALL)) &&
+          s->rxint == 1) || // rx ints enabled, pending
+         ((s->wregs[W_EXTINT] & EXTINT_BRKINT) &&
+          (s->rregs[R_STATUS] & STATUS_BRK)))) { // break int e&p
+        return 1;
+    }
+    return 0;
+}
+
+static void slavio_serial_update_irq(ChannelState *s)
+{
+    int irq;
+
+    irq = slavio_serial_update_irq_chn(s);
+    irq |= slavio_serial_update_irq_chn(s->otherchn);
+
+    SER_DPRINTF("IRQ = %d\n", irq);
+    qemu_set_irq(s->irq, irq);
+}
+
+static void slavio_serial_reset_chn(ChannelState *s)
+{
+    int i;
+
+    s->reg = 0;
+    for (i = 0; i < SERIAL_REGS; i++) {
+        s->rregs[i] = 0;
+        s->wregs[i] = 0;
+    }
+    s->wregs[W_TXCTRL1] = TXCTRL1_1STOP; // 1X divisor, 1 stop bit, no parity
+    s->wregs[W_MINTR] = MINTR_RST_ALL;
+    s->wregs[W_CLOCK] = CLOCK_TRXC; // Synch mode tx clock = TRxC
+    s->wregs[W_MISC2] = MISC2_PLLDIS; // PLL disabled
+    s->wregs[W_EXTINT] = EXTINT_DCD | EXTINT_SYNCINT | EXTINT_CTSINT |
+        EXTINT_TXUNDRN | EXTINT_BRKINT; // Enable most interrupts
+    if (s->disabled)
+        s->rregs[R_STATUS] = STATUS_TXEMPTY | STATUS_DCD | STATUS_SYNC |
+            STATUS_CTS | STATUS_TXUNDRN;
+    else
+        s->rregs[R_STATUS] = STATUS_TXEMPTY | STATUS_TXUNDRN;
+    s->rregs[R_SPEC] = SPEC_BITS8 | SPEC_ALLSENT;
+
+    s->rx = s->tx = 0;
+    s->rxint = s->txint = 0;
+    s->rxint_under_svc = s->txint_under_svc = 0;
+    s->e0_mode = s->led_mode = s->caps_lock_mode = s->num_lock_mode = 0;
+    clear_queue(s);
+}
+
+static void slavio_serial_reset(void *opaque)
+{
+    SerialState *s = opaque;
+    slavio_serial_reset_chn(&s->chn[0]);
+    slavio_serial_reset_chn(&s->chn[1]);
+}
+
+static inline void set_rxint(ChannelState *s)
+{
+    s->rxint = 1;
+    if (!s->txint_under_svc) {
+        s->rxint_under_svc = 1;
+        if (s->chn == chn_a) {
+            if (s->wregs[W_MINTR] & MINTR_STATUSHI)
+                s->otherchn->rregs[R_IVEC] = IVEC_HIRXINTA;
+            else
+                s->otherchn->rregs[R_IVEC] = IVEC_LORXINTA;
+        } else {
+            if (s->wregs[W_MINTR] & MINTR_STATUSHI)
+                s->rregs[R_IVEC] = IVEC_HIRXINTB;
+            else
+                s->rregs[R_IVEC] = IVEC_LORXINTB;
+        }
+    }
+    if (s->chn == chn_a)
+        s->rregs[R_INTR] |= INTR_RXINTA;
+    else
+        s->otherchn->rregs[R_INTR] |= INTR_RXINTB;
+    slavio_serial_update_irq(s);
+}
+
+static inline void set_txint(ChannelState *s)
+{
+    s->txint = 1;
+    if (!s->rxint_under_svc) {
+        s->txint_under_svc = 1;
+        if (s->chn == chn_a) {
+            if (s->wregs[W_MINTR] & MINTR_STATUSHI)
+                s->otherchn->rregs[R_IVEC] = IVEC_HITXINTA;
+            else
+                s->otherchn->rregs[R_IVEC] = IVEC_LOTXINTA;
+        } else {
+            s->rregs[R_IVEC] = IVEC_TXINTB;
+        }
+    }
+    if (s->chn == chn_a)
+        s->rregs[R_INTR] |= INTR_TXINTA;
+    else
+        s->otherchn->rregs[R_INTR] |= INTR_TXINTB;
+    slavio_serial_update_irq(s);
+}
+
+static inline void clr_rxint(ChannelState *s)
+{
+    s->rxint = 0;
+    s->rxint_under_svc = 0;
+    if (s->chn == chn_a) {
+        if (s->wregs[W_MINTR] & MINTR_STATUSHI)
+            s->otherchn->rregs[R_IVEC] = IVEC_HINOINT;
+        else
+            s->otherchn->rregs[R_IVEC] = IVEC_LONOINT;
+        s->rregs[R_INTR] &= ~INTR_RXINTA;
+    } else {
+        if (s->wregs[W_MINTR] & MINTR_STATUSHI)
+            s->rregs[R_IVEC] = IVEC_HINOINT;
+        else
+            s->rregs[R_IVEC] = IVEC_LONOINT;
+        s->otherchn->rregs[R_INTR] &= ~INTR_RXINTB;
+    }
+    if (s->txint)
+        set_txint(s);
+    slavio_serial_update_irq(s);
+}
+
+static inline void clr_txint(ChannelState *s)
+{
+    s->txint = 0;
+    s->txint_under_svc = 0;
+    if (s->chn == chn_a) {
+        if (s->wregs[W_MINTR] & MINTR_STATUSHI)
+            s->otherchn->rregs[R_IVEC] = IVEC_HINOINT;
+        else
+            s->otherchn->rregs[R_IVEC] = IVEC_LONOINT;
+        s->rregs[R_INTR] &= ~INTR_TXINTA;
+    } else {
+        if (s->wregs[W_MINTR] & MINTR_STATUSHI)
+            s->rregs[R_IVEC] = IVEC_HINOINT;
+        else
+            s->rregs[R_IVEC] = IVEC_LONOINT;
+        s->otherchn->rregs[R_INTR] &= ~INTR_TXINTB;
+    }
+    if (s->rxint)
+        set_rxint(s);
+    slavio_serial_update_irq(s);
+}
+
+static void slavio_serial_update_parameters(ChannelState *s)
+{
+    int speed, parity, data_bits, stop_bits;
+    QEMUSerialSetParams ssp;
+
+    if (!s->chr || s->type != ser)
+        return;
+
+    if (s->wregs[W_TXCTRL1] & TXCTRL1_PAREN) {
+        if (s->wregs[W_TXCTRL1] & TXCTRL1_PAREV)
+            parity = 'E';
+        else
+            parity = 'O';
+    } else {
+        parity = 'N';
+    }
+    if ((s->wregs[W_TXCTRL1] & TXCTRL1_STPMSK) == TXCTRL1_2STOP)
+        stop_bits = 2;
+    else
+        stop_bits = 1;
+    switch (s->wregs[W_TXCTRL2] & TXCTRL2_BITMSK) {
+    case TXCTRL2_5BITS:
+        data_bits = 5;
+        break;
+    case TXCTRL2_7BITS:
+        data_bits = 7;
+        break;
+    case TXCTRL2_6BITS:
+        data_bits = 6;
+        break;
+    default:
+    case TXCTRL2_8BITS:
+        data_bits = 8;
+        break;
+    }
+    speed = 2457600 / ((s->wregs[W_BRGLO] | (s->wregs[W_BRGHI] << 8)) + 2);
+    switch (s->wregs[W_TXCTRL1] & TXCTRL1_CLKMSK) {
+    case TXCTRL1_CLK1X:
+        break;
+    case TXCTRL1_CLK16X:
+        speed /= 16;
+        break;
+    case TXCTRL1_CLK32X:
+        speed /= 32;
+        break;
+    default:
+    case TXCTRL1_CLK64X:
+        speed /= 64;
+        break;
+    }
+    ssp.speed = speed;
+    ssp.parity = parity;
+    ssp.data_bits = data_bits;
+    ssp.stop_bits = stop_bits;
+    SER_DPRINTF("channel %c: speed=%d parity=%c data=%d stop=%d\n", CHN_C(s),
+                speed, parity, data_bits, stop_bits);
+    qemu_chr_ioctl(s->chr, CHR_IOCTL_SERIAL_SET_PARAMS, &ssp);
+}
+
+static void slavio_serial_mem_writeb(void *opaque, target_phys_addr_t addr,
+                                     uint32_t val)
+{
+    SerialState *serial = opaque;
+    ChannelState *s;
+    uint32_t saddr;
+    int newreg, channel;
+
+    val &= 0xff;
+    saddr = (addr & 3) >> 1;
+    channel = addr >> 2;
+    s = &serial->chn[channel];
+    switch (saddr) {
+    case SERIAL_CTRL:
+        SER_DPRINTF("Write channel %c, reg[%d] = %2.2x\n", CHN_C(s), s->reg,
+                    val & 0xff);
+        newreg = 0;
+        switch (s->reg) {
+        case W_CMD:
+            newreg = val & CMD_PTR_MASK;
+            val &= CMD_CMD_MASK;
+            switch (val) {
+            case CMD_HI:
+                newreg |= CMD_HI;
+                break;
+            case CMD_CLR_TXINT:
+                clr_txint(s);
+                break;
+            case CMD_CLR_IUS:
+                if (s->rxint_under_svc)
+                    clr_rxint(s);
+                else if (s->txint_under_svc)
+                    clr_txint(s);
+                break;
+            default:
+                break;
+            }
+            break;
+        case W_INTR ... W_RXCTRL:
+        case W_SYNC1 ... W_TXBUF:
+        case W_MISC1 ... W_CLOCK:
+        case W_MISC2 ... W_EXTINT:
+            s->wregs[s->reg] = val;
+            break;
+        case W_TXCTRL1:
+        case W_TXCTRL2:
+            s->wregs[s->reg] = val;
+            slavio_serial_update_parameters(s);
+            break;
+        case W_BRGLO:
+        case W_BRGHI:
+            s->wregs[s->reg] = val;
+            s->rregs[s->reg] = val;
+            slavio_serial_update_parameters(s);
+            break;
+        case W_MINTR:
+            switch (val & MINTR_RST_MASK) {
+            case 0:
+            default:
+                break;
+            case MINTR_RST_B:
+                slavio_serial_reset_chn(&serial->chn[0]);
+                return;
+            case MINTR_RST_A:
+                slavio_serial_reset_chn(&serial->chn[1]);
+                return;
+            case MINTR_RST_ALL:
+                slavio_serial_reset(serial);
+                return;
+            }
+            break;
+        default:
+            break;
+        }
+        if (s->reg == 0)
+            s->reg = newreg;
+        else
+            s->reg = 0;
+        break;
+    case SERIAL_DATA:
+        SER_DPRINTF("Write channel %c, ch %d\n", CHN_C(s), val);
+        s->tx = val;
+        if (s->wregs[W_TXCTRL2] & TXCTRL2_TXEN) { // tx enabled
+            if (s->chr)
+                qemu_chr_write(s->chr, &s->tx, 1);
+            else if (s->type == kbd && !s->disabled) {
+                handle_kbd_command(s, val);
+            }
+        }
+        s->rregs[R_STATUS] |= STATUS_TXEMPTY; // Tx buffer empty
+        s->rregs[R_SPEC] |= SPEC_ALLSENT; // All sent
+        set_txint(s);
+        break;
+    default:
+        break;
+    }
+}
+
+static uint32_t slavio_serial_mem_readb(void *opaque, target_phys_addr_t addr)
+{
+    SerialState *serial = opaque;
+    ChannelState *s;
+    uint32_t saddr;
+    uint32_t ret;
+    int channel;
+
+    saddr = (addr & 3) >> 1;
+    channel = addr >> 2;
+    s = &serial->chn[channel];
+    switch (saddr) {
+    case SERIAL_CTRL:
+        SER_DPRINTF("Read channel %c, reg[%d] = %2.2x\n", CHN_C(s), s->reg,
+                    s->rregs[s->reg]);
+        ret = s->rregs[s->reg];
+        s->reg = 0;
+        return ret;
+    case SERIAL_DATA:
+        s->rregs[R_STATUS] &= ~STATUS_RXAV;
+        clr_rxint(s);
+        if (s->type == kbd || s->type == mouse)
+            ret = get_queue(s);
+        else
+            ret = s->rx;
+        SER_DPRINTF("Read channel %c, ch %d\n", CHN_C(s), ret);
+        if (s->chr)
+            qemu_chr_accept_input(s->chr);
+        return ret;
+    default:
+        break;
+    }
+    return 0;
+}
+
+static int serial_can_receive(void *opaque)
+{
+    ChannelState *s = opaque;
+    int ret;
+
+    if (((s->wregs[W_RXCTRL] & RXCTRL_RXEN) == 0) // Rx not enabled
+        || ((s->rregs[R_STATUS] & STATUS_RXAV) == STATUS_RXAV))
+        // char already available
+        ret = 0;
+    else
+        ret = 1;
+    return ret;
+}
+
+static void serial_receive_byte(ChannelState *s, int ch)
+{
+    SER_DPRINTF("channel %c put ch %d\n", CHN_C(s), ch);
+    s->rregs[R_STATUS] |= STATUS_RXAV;
+    s->rx = ch;
+    set_rxint(s);
+}
+
+static void serial_receive_break(ChannelState *s)
+{
+    s->rregs[R_STATUS] |= STATUS_BRK;
+    slavio_serial_update_irq(s);
+}
+
+static void serial_receive1(void *opaque, const uint8_t *buf, int size)
+{
+    ChannelState *s = opaque;
+    serial_receive_byte(s, buf[0]);
+}
+
+static void serial_event(void *opaque, int event)
+{
+    ChannelState *s = opaque;
+    if (event == CHR_EVENT_BREAK)
+        serial_receive_break(s);
+}
+
+static CPUReadMemoryFunc *slavio_serial_mem_read[3] = {
+    slavio_serial_mem_readb,
+    NULL,
+    NULL,
+};
+
+static CPUWriteMemoryFunc *slavio_serial_mem_write[3] = {
+    slavio_serial_mem_writeb,
+    NULL,
+    NULL,
+};
+
+static void slavio_serial_save_chn(QEMUFile *f, ChannelState *s)
+{
+    uint32_t tmp = 0;
+
+    qemu_put_be32s(f, &tmp); /* unused, was IRQ.  */
+    qemu_put_be32s(f, &s->reg);
+    qemu_put_be32s(f, &s->rxint);
+    qemu_put_be32s(f, &s->txint);
+    qemu_put_be32s(f, &s->rxint_under_svc);
+    qemu_put_be32s(f, &s->txint_under_svc);
+    qemu_put_8s(f, &s->rx);
+    qemu_put_8s(f, &s->tx);
+    qemu_put_buffer(f, s->wregs, SERIAL_REGS);
+    qemu_put_buffer(f, s->rregs, SERIAL_REGS);
+}
+
+static void slavio_serial_save(QEMUFile *f, void *opaque)
+{
+    SerialState *s = opaque;
+
+    slavio_serial_save_chn(f, &s->chn[0]);
+    slavio_serial_save_chn(f, &s->chn[1]);
+}
+
+static int slavio_serial_load_chn(QEMUFile *f, ChannelState *s, int version_id)
+{
+    uint32_t tmp;
+
+    if (version_id > 2)
+        return -EINVAL;
+
+    qemu_get_be32s(f, &tmp); /* unused */
+    qemu_get_be32s(f, &s->reg);
+    qemu_get_be32s(f, &s->rxint);
+    qemu_get_be32s(f, &s->txint);
+    if (version_id >= 2) {
+        qemu_get_be32s(f, &s->rxint_under_svc);
+        qemu_get_be32s(f, &s->txint_under_svc);
+    }
+    qemu_get_8s(f, &s->rx);
+    qemu_get_8s(f, &s->tx);
+    qemu_get_buffer(f, s->wregs, SERIAL_REGS);
+    qemu_get_buffer(f, s->rregs, SERIAL_REGS);
+    return 0;
+}
+
+static int slavio_serial_load(QEMUFile *f, void *opaque, int version_id)
+{
+    SerialState *s = opaque;
+    int ret;
+
+    ret = slavio_serial_load_chn(f, &s->chn[0], version_id);
+    if (ret != 0)
+        return ret;
+    ret = slavio_serial_load_chn(f, &s->chn[1], version_id);
+    return ret;
+
+}
+
+SerialState *slavio_serial_init(target_phys_addr_t base, qemu_irq irq,
+                                CharDriverState *chr1, CharDriverState *chr2)
+{
+    int slavio_serial_io_memory, i;
+    SerialState *s;
+
+    s = qemu_mallocz(sizeof(SerialState));
+    if (!s)
+        return NULL;
+
+    slavio_serial_io_memory = cpu_register_io_memory(0, slavio_serial_mem_read,
+                                                     slavio_serial_mem_write,
+                                                     s);
+    cpu_register_physical_memory(base, SERIAL_SIZE, slavio_serial_io_memory);
+
+    s->chn[0].chr = chr1;
+    s->chn[1].chr = chr2;
+    s->chn[0].disabled = 0;
+    s->chn[1].disabled = 0;
+
+    for (i = 0; i < 2; i++) {
+        s->chn[i].irq = irq;
+        s->chn[i].chn = 1 - i;
+        s->chn[i].type = ser;
+        if (s->chn[i].chr) {
+            qemu_chr_add_handlers(s->chn[i].chr, serial_can_receive,
+                                  serial_receive1, serial_event, &s->chn[i]);
+        }
+    }
+    s->chn[0].otherchn = &s->chn[1];
+    s->chn[1].otherchn = &s->chn[0];
+    register_savevm("slavio_serial", base, 2, slavio_serial_save,
+                    slavio_serial_load, s);
+    qemu_register_reset(slavio_serial_reset, s);
+    slavio_serial_reset(s);
+    return s;
+}
+
+static const uint8_t keycodes[128] = {
+    127, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 43, 53,
+    54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 89, 76, 77, 78,
+    79, 80, 81, 82, 83, 84, 85, 86, 87, 42, 99, 88, 100, 101, 102, 103,
+    104, 105, 106, 107, 108, 109, 110, 47, 19, 121, 119, 5, 6, 8, 10, 12,
+    14, 16, 17, 18, 7, 98, 23, 68, 69, 70, 71, 91, 92, 93, 125, 112,
+    113, 114, 94, 50, 0, 0, 124, 9, 11, 0, 0, 0, 0, 0, 0, 0,
+    90, 0, 46, 22, 13, 111, 52, 20, 96, 24, 28, 74, 27, 123, 44, 66,
+    0, 45, 2, 4, 48, 0, 0, 21, 0, 0, 0, 0, 0, 120, 122, 67,
+};
+
+static const uint8_t e0_keycodes[128] = {
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 90, 76, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 109, 0, 0, 13, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 68, 69, 70, 0, 91, 0, 93, 0, 112,
+    113, 114, 94, 50, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+    1, 3, 25, 26, 49, 52, 72, 73, 97, 99, 111, 118, 120, 122, 67, 0,
+};
+
+static void sunkbd_event(void *opaque, int ch)
+{
+    ChannelState *s = opaque;
+    int release = ch & 0x80;
+
+    KBD_DPRINTF("Untranslated keycode %2.2x (%s)\n", ch, release? "release" :
+                "press");
+    switch (ch) {
+    case 58: // Caps lock press
+        s->caps_lock_mode ^= 1;
+        if (s->caps_lock_mode == 2)
+            return; // Drop second press
+        break;
+    case 69: // Num lock press
+        s->num_lock_mode ^= 1;
+        if (s->num_lock_mode == 2)
+            return; // Drop second press
+        break;
+    case 186: // Caps lock release
+        s->caps_lock_mode ^= 2;
+        if (s->caps_lock_mode == 3)
+            return; // Drop first release
+        break;
+    case 197: // Num lock release
+        s->num_lock_mode ^= 2;
+        if (s->num_lock_mode == 3)
+            return; // Drop first release
+        break;
+    case 0xe0:
+        s->e0_mode = 1;
+        return;
+    default:
+        break;
+    }
+    if (s->e0_mode) {
+        s->e0_mode = 0;
+        ch = e0_keycodes[ch & 0x7f];
+    } else {
+        ch = keycodes[ch & 0x7f];
+    }
+    KBD_DPRINTF("Translated keycode %2.2x\n", ch);
+    put_queue(s, ch | release);
+}
+
+static void handle_kbd_command(ChannelState *s, int val)
+{
+    KBD_DPRINTF("Command %d\n", val);
+    if (s->led_mode) { // Ignore led byte
+        s->led_mode = 0;
+        return;
+    }
+    switch (val) {
+    case 1: // Reset, return type code
+        clear_queue(s);
+        put_queue(s, 0xff);
+        put_queue(s, 4); // Type 4
+        put_queue(s, 0x7f);
+        break;
+    case 0xe: // Set leds
+        s->led_mode = 1;
+        break;
+    case 7: // Query layout
+    case 0xf:
+        clear_queue(s);
+        put_queue(s, 0xfe);
+        put_queue(s, 0); // XXX, layout?
+        break;
+    default:
+        break;
+    }
+}
+
+static void sunmouse_event(void *opaque,
+                               int dx, int dy, int dz, int buttons_state)
+{
+    ChannelState *s = opaque;
+    int ch;
+
+    MS_DPRINTF("dx=%d dy=%d buttons=%01x\n", dx, dy, buttons_state);
+
+    ch = 0x80 | 0x7; /* protocol start byte, no buttons pressed */
+
+    if (buttons_state & MOUSE_EVENT_LBUTTON)
+        ch ^= 0x4;
+    if (buttons_state & MOUSE_EVENT_MBUTTON)
+        ch ^= 0x2;
+    if (buttons_state & MOUSE_EVENT_RBUTTON)
+        ch ^= 0x1;
+
+    put_queue(s, ch);
+
+    ch = dx;
+
+    if (ch > 127)
+        ch=127;
+    else if (ch < -127)
+        ch=-127;
+
+    put_queue(s, ch & 0xff);
+
+    ch = -dy;
+
+    if (ch > 127)
+        ch=127;
+    else if (ch < -127)
+        ch=-127;
+
+    put_queue(s, ch & 0xff);
+
+    // MSC protocol specify two extra motion bytes
+
+    put_queue(s, 0);
+    put_queue(s, 0);
+}
+
+void slavio_serial_ms_kbd_init(target_phys_addr_t base, qemu_irq irq,
+                               int disabled)
+{
+    int slavio_serial_io_memory, i;
+    SerialState *s;
+
+    s = qemu_mallocz(sizeof(SerialState));
+    if (!s)
+        return;
+    for (i = 0; i < 2; i++) {
+        s->chn[i].irq = irq;
+        s->chn[i].chn = 1 - i;
+        s->chn[i].chr = NULL;
+    }
+    s->chn[0].otherchn = &s->chn[1];
+    s->chn[1].otherchn = &s->chn[0];
+    s->chn[0].type = mouse;
+    s->chn[1].type = kbd;
+    s->chn[0].disabled = disabled;
+    s->chn[1].disabled = disabled;
+
+    slavio_serial_io_memory = cpu_register_io_memory(0, slavio_serial_mem_read,
+                                                     slavio_serial_mem_write,
+                                                     s);
+    cpu_register_physical_memory(base, SERIAL_SIZE, slavio_serial_io_memory);
+
+    qemu_add_mouse_event_handler(sunmouse_event, &s->chn[0], 0,
+                                 "QEMU Sun Mouse");
+    qemu_add_kbd_event_handler(sunkbd_event, &s->chn[1]);
+    register_savevm("slavio_serial_mouse", base, 2, slavio_serial_save,
+                    slavio_serial_load, s);
+    qemu_register_reset(slavio_serial_reset, s);
+    slavio_serial_reset(s);
+}