Index: hw/serial.c
===================================================================
RCS file: /cvsroot/qemu/qemu/hw/serial.c,v
retrieving revision 1.7
diff -u -r1.7 serial.c
--- hw/serial.c	24 Aug 2004 21:55:28 -0000	1.7
+++ hw/serial.c	25 Jul 2005 10:06:16 -0000
@@ -23,6 +23,11 @@
  */
 #include "vl.h"
 
+#define PIPE_SERIAL
+#ifdef PIPE_SERIAL
+#include <windows.h>
+#endif
+
 //#define DEBUG_SERIAL
 
 #define UART_LCR_DLAB	0x80	/* Divisor latch access bit */
@@ -84,7 +89,13 @@
        it can be reset while reading iir */
     int thr_ipending;
     int irq;
+#ifndef PIPE_SERIAL
     CharDriverState *chr;
+#else
+    QEMUTimer *timer;
+    HANDLE pipe_handle;
+    int32_t baudrate;
+#endif
 };
 
 static void serial_update_irq(SerialState *s)
@@ -107,6 +118,9 @@
 {
     SerialState *s = opaque;
     unsigned char ch;
+#ifdef PIPE_SERIAL
+    DWORD written;
+#endif
     
     addr &= 7;
 #ifdef DEBUG_SERIAL
@@ -117,12 +131,21 @@
     case 0:
         if (s->lcr & UART_LCR_DLAB) {
             s->divider = (s->divider & 0xff00) | val;
+#ifdef PIPE_SERIAL
+            if (s->divider) {
+                s->baudrate = 1843200 / (16 * s->divider);
+            }
+#endif
         } else {
             s->thr_ipending = 0;
             s->lsr &= ~UART_LSR_THRE;
             serial_update_irq(s);
             ch = val;
+#ifndef PIPE_SERIAL
             qemu_chr_write(s->chr, &ch, 1);
+#else
+            WriteFile(s->pipe_handle, &ch, 1, &written, NULL);
+#endif
             s->thr_ipending = 1;
             s->lsr |= UART_LSR_THRE;
             s->lsr |= UART_LSR_TEMT;
@@ -143,6 +166,14 @@
     case 2:
         break;
     case 3:
+#ifdef PIPE_SERIAL
+        if (!(val & UART_LCR_DLAB) && (s->lcr & UART_LCR_DLAB)) {
+            if (s->baudrate != 0) {
+                qemu_mod_timer(s->timer, qemu_get_clock(vm_clock) +
+                               (ticks_per_sec / s->baudrate));
+            }
+        }
+#endif
         s->lcr = val;
         break;
     case 4:
@@ -174,6 +205,11 @@
             ret = s->rbr;
             s->lsr &= ~(UART_LSR_DR | UART_LSR_BI);
             serial_update_irq(s);
+#ifdef PIPE_SERIAL
+            if (s->baudrate)
+                qemu_mod_timer(s->timer, qemu_get_clock(vm_clock) /*+
+                               (ticks_per_sec / s->baudrate)*/);
+#endif
         }
         break;
     case 1:
@@ -258,6 +294,27 @@
         serial_receive_break(s);
 }
 
+#ifdef PIPE_SERIAL
+static void rx_timer(void *opaque)
+{
+    SerialState *s = opaque;
+    DWORD temp;
+    char buffer;
+
+    if (!(s->lsr & UART_LSR_DR)) {
+        if (PeekNamedPipe(s->pipe_handle, NULL, 0, NULL, &temp, 0) && temp) {
+            ReadFile(s->pipe_handle, &buffer, 1, &temp, NULL);
+            serial_receive_byte(s, buffer);
+            qemu_del_timer(s->timer);
+            return;
+        }
+    }
+
+    qemu_mod_timer(s->timer, qemu_get_clock(vm_clock) +
+                   (ticks_per_sec / s->baudrate));
+}
+#endif
+
 /* If fd is zero, it means that the serial device uses the console */
 SerialState *serial_init(int base, int irq, CharDriverState *chr)
 {
@@ -272,8 +329,18 @@
 
     register_ioport_write(base, 8, 1, serial_ioport_write, s);
     register_ioport_read(base, 8, 1, serial_ioport_read, s);
+#ifndef PIPE_SERIAL
     s->chr = chr;
     qemu_chr_add_read_handler(chr, serial_can_receive1, serial_receive1, s);
     qemu_chr_add_event_handler(chr, serial_event);
+#else
+    s->timer = qemu_new_timer(vm_clock, rx_timer, s);
+    qemu_mod_timer(s->timer, qemu_get_clock(vm_clock));
+    s->pipe_handle = CreateNamedPipe("\\\\.\\pipe\\com_1", PIPE_ACCESS_DUPLEX,
+                                     PIPE_TYPE_BYTE, 1, 0x4000, 0x4000, 30000,
+                                     NULL);
+    s->baudrate = 115200;
+#endif
+    
     return s;
 }