more generic serial port (initial patch by Jocelyn Mayer)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1654 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 97 insertions, 3 deletions

diff --git a/hw/serial.c b/hw/serial.c
index 0250d77..254434e 100644
--- a/hw/serial.c
+++ b/hw/serial.c
@@ -83,9 +83,13 @@ struct SerialState {
     /* NOTE: this hidden state is necessary for tx irq generation as
        it can be reset while reading iir */
     int thr_ipending;
+    SetIRQFunc *set_irq;
+    void *irq_opaque;
     int irq;
     CharDriverState *chr;
     int last_break_enable;
+    target_ulong base;
+    int it_shift;
 };
 
 static void serial_update_irq(SerialState *s)
@@ -98,9 +102,9 @@ static void serial_update_irq(SerialState *s)
         s->iir = UART_IIR_NO_INT;
     }
     if (s->iir != UART_IIR_NO_INT) {
-        pic_set_irq(s->irq, 1);
+        s->set_irq(s->irq_opaque, s->irq, 1);
     } else {
-        pic_set_irq(s->irq, 0);
+        s->set_irq(s->irq_opaque, s->irq, 0);
     }
 }
 
@@ -339,13 +343,16 @@ static int serial_load(QEMUFile *f, void *opaque, int version_id)
 }
 
 /* If fd is zero, it means that the serial device uses the console */
-SerialState *serial_init(int base, int irq, CharDriverState *chr)
+SerialState *serial_init(SetIRQFunc *set_irq, void *opaque,
+                         int base, int irq, CharDriverState *chr)
 {
     SerialState *s;
 
     s = qemu_mallocz(sizeof(SerialState));
     if (!s)
         return NULL;
+    s->set_irq = set_irq;
+    s->irq_opaque = opaque;
     s->irq = irq;
     s->lsr = UART_LSR_TEMT | UART_LSR_THRE;
     s->iir = UART_IIR_NO_INT;
@@ -359,3 +366,90 @@ SerialState *serial_init(int base, int irq, CharDriverState *chr)
     qemu_chr_add_event_handler(chr, serial_event);
     return s;
 }
+
+/* Memory mapped interface */
+static uint32_t serial_mm_readb (void *opaque, target_phys_addr_t addr)
+{
+    SerialState *s = opaque;
+
+    return serial_ioport_read(s, (addr - s->base) >> s->it_shift) & 0xFF;
+}
+
+static void serial_mm_writeb (void *opaque,
+                              target_phys_addr_t addr, uint32_t value)
+{
+    SerialState *s = opaque;
+
+    serial_ioport_write(s, (addr - s->base) >> s->it_shift, value & 0xFF);
+}
+
+static uint32_t serial_mm_readw (void *opaque, target_phys_addr_t addr)
+{
+    SerialState *s = opaque;
+
+    return serial_ioport_read(s, (addr - s->base) >> s->it_shift) & 0xFFFF;
+}
+
+static void serial_mm_writew (void *opaque,
+                              target_phys_addr_t addr, uint32_t value)
+{
+    SerialState *s = opaque;
+
+    serial_ioport_write(s, (addr - s->base) >> s->it_shift, value & 0xFFFF);
+}
+
+static uint32_t serial_mm_readl (void *opaque, target_phys_addr_t addr)
+{
+    SerialState *s = opaque;
+
+    return serial_ioport_read(s, (addr - s->base) >> s->it_shift);
+}
+
+static void serial_mm_writel (void *opaque,
+                              target_phys_addr_t addr, uint32_t value)
+{
+    SerialState *s = opaque;
+
+    serial_ioport_write(s, (addr - s->base) >> s->it_shift, value);
+}
+
+static CPUReadMemoryFunc *serial_mm_read[] = {
+    &serial_mm_readb,
+    &serial_mm_readw,
+    &serial_mm_readl,
+};
+
+static CPUWriteMemoryFunc *serial_mm_write[] = {
+    &serial_mm_writeb,
+    &serial_mm_writew,
+    &serial_mm_writel,
+};
+
+SerialState *serial_mm_init (SetIRQFunc *set_irq, void *opaque,
+                             target_ulong base, int it_shift,
+                             int irq, CharDriverState *chr)
+{
+    SerialState *s;
+    int s_io_memory;
+
+    s = qemu_mallocz(sizeof(SerialState));
+    if (!s)
+        return NULL;
+    s->set_irq = set_irq;
+    s->irq_opaque = opaque;
+    s->irq = irq;
+    s->lsr = UART_LSR_TEMT | UART_LSR_THRE;
+    s->iir = UART_IIR_NO_INT;
+    s->base = base;
+    s->it_shift = it_shift;
+
+    register_savevm("serial", base, 1, serial_save, serial_load, s);
+
+    s_io_memory = cpu_register_io_memory(0, serial_mm_read,
+                                         serial_mm_write, s);
+    cpu_register_physical_memory(base, 8 << it_shift, s_io_memory);
+    s->chr = chr;
+    qemu_chr_add_read_handler(chr, serial_can_receive1, serial_receive1, s);
+    qemu_chr_add_event_handler(chr, serial_event);
+    return s;
+}