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serial-mm: add "regshift" property 

And a property and rename "it_shift" field to "regshift", as it seems
to be more popular (and I don't know what "it" stands for).

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Marc-André Lureau 2019-10-21 20:14:02 +02:00
parent 490a9d9b36
commit 17fd1a6490
2 changed files with 19 additions and 7 deletions
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22
hw/char/serial.c
View File

@ -1033,7 +1033,7 @@ static uint64_t serial_mm_read(void *opaque, hwaddr addr,
unsigned size)
{
SerialMM *s = SERIAL_MM(opaque);
return serial_ioport_read(&s->serial, addr >> s->it_shift, 1);
return serial_ioport_read(&s->serial, addr >> s->regshift, 1);
}
static void serial_mm_write(void *opaque, hwaddr addr,
@ -1041,7 +1041,7 @@ static void serial_mm_write(void *opaque, hwaddr addr,
{
SerialMM *s = SERIAL_MM(opaque);
value &= 255;
serial_ioport_write(&s->serial, addr >> s->it_shift, value, 1);
serial_ioport_write(&s->serial, addr >> s->regshift, value, 1);
}
static void serial_mm_realize(DeviceState *dev, Error **errp)
@ -1081,14 +1081,14 @@ static const MemoryRegionOps serial_mm_ops[3] = {
};
SerialMM *serial_mm_init(MemoryRegion *address_space,
hwaddr base, int it_shift,
hwaddr base, int regshift,
qemu_irq irq, int baudbase,
Chardev *chr, enum device_endian end)
{
SerialMM *smm = SERIAL_MM(qdev_create(NULL, TYPE_SERIAL_MM));
SerialState *s = &smm->serial;
smm->it_shift = it_shift;
qdev_prop_set_uint8(DEVICE(smm), "regshift", regshift);
s->irq = irq;
qdev_prop_set_uint32(DEVICE(s), "baudbase", baudbase);
qdev_prop_set_chr(DEVICE(s), "chardev", chr);
@ -1097,7 +1097,7 @@ SerialMM *serial_mm_init(MemoryRegion *address_space,
qdev_init_nofail(DEVICE(smm));
memory_region_init_io(&s->io, NULL, &serial_mm_ops[end], smm,
"serial", 8 << it_shift);
"serial", 8 << regshift);
memory_region_add_subregion(address_space, base, &s->io);
return smm;
@ -1111,10 +1111,21 @@ static void serial_mm_instance_init(Object *o)
TYPE_SERIAL, &error_abort, NULL);
}
static Property serial_mm_properties[] = {
/*
* Set the spacing between adjacent memory-mapped UART registers.
* Each register will be at (1 << regshift) bytes after the
* previous one.
*/
DEFINE_PROP_UINT8("regshift", SerialMM, regshift, 0),
DEFINE_PROP_END_OF_LIST(),
};
static void serial_mm_class_init(ObjectClass *oc, void *data)
{
DeviceClass *dc = DEVICE_CLASS(oc);
dc->props = serial_mm_properties;
dc->realize = serial_mm_realize;
}
@ -1124,6 +1135,7 @@ static const TypeInfo serial_mm_info = {
.class_init = serial_mm_class_init,
.instance_init = serial_mm_instance_init,
.instance_size = sizeof(SerialMM),
.class_init = serial_mm_class_init,
};
static void serial_register_types(void)

4
include/hw/char/serial.h
View File

@ -84,7 +84,7 @@ typedef struct SerialMM {
SerialState serial;
int it_shift;
uint8_t regshift;
} SerialMM;
extern const VMStateDescription vmstate_serial;
@ -101,7 +101,7 @@ void serial_set_frequency(SerialState *s, uint32_t frequency);
SerialState *serial_init(int base, qemu_irq irq, int baudbase,
Chardev *chr, MemoryRegion *system_io);
SerialMM *serial_mm_init(MemoryRegion *address_space,
hwaddr base, int it_shift,
hwaddr base, int regshift,
qemu_irq irq, int baudbase,
Chardev *chr, enum device_endian end);