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next-cube: move floppy disk MMIO to separate memory region in next-pc

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The dummy floppy disk device is part of the next-pc device, and not related to
the NeXTCube SCRs.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Thomas Huth <huth@tuxfamily.org>
Message-ID: <20241222130012.1013374-10-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Thomas Huth <huth@tuxfamily.org>
This commit is contained in:
Mark Cave-Ayland 2024-12-22 12:59:48 +00:00 • committed by Thomas Huth
parent 7bce8d1272
commit df21980591
1 changed files with 49 additions and 12 deletions
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61
hw/m68k/next-cube.c
View file

@ -108,6 +108,7 @@ struct NeXTPC {
M68kCPU *cpu;
MemoryRegion floppy_mem;
MemoryRegion mmiomem;
MemoryRegion scrmem;
@ -368,11 +369,6 @@ static uint64_t next_scr_readfn(void *opaque, hwaddr addr, unsigned size)
uint64_t val;
switch (addr) {
case 0x14108:
DPRINTF("FD read @ %x\n", (unsigned int)addr);
val = 0x40 | 0x04 | 0x2 | 0x1;
break;
/*
* These 4 registers are the hardware timer, not sure which register
* is the latch instead of data, but no problems so far.
@ -402,13 +398,6 @@ static void next_scr_writefn(void *opaque, hwaddr addr, uint64_t val,
unsigned size)
{
switch (addr) {
case 0x14108:
DPRINTF("FDCSR Write: %"PRIx64 "\n", val);
if (val == 0x0) {
/* qemu_irq_raise(s->fd_irq[0]); */
}
break;
/* Hardware timer latch - not implemented yet */
case 0x1a000:
default:
@ -948,6 +937,47 @@ static const TypeInfo next_scsi_info = {
.class_init = next_scsi_class_init,
};
static void next_floppy_write(void *opaque, hwaddr addr, uint64_t val,
unsigned size)
{
switch (addr) {
case 0:
DPRINTF("FDCSR Write: %"PRIx64 "\n", val);
if (val == 0x0) {
/* qemu_irq_raise(s->fd_irq[0]); */
}
break;
default:
g_assert_not_reached();
}
}
static uint64_t next_floppy_read(void *opaque, hwaddr addr, unsigned size)
{
uint64_t val;
switch (addr) {
case 0:
DPRINTF("FD read @ %x\n", (unsigned int)addr);
val = 0x40 | 0x04 | 0x2 | 0x1;
break;
default:
g_assert_not_reached();
}
return val;
}
static const MemoryRegionOps next_floppy_ops = {
.read = next_floppy_read,
.write = next_floppy_write,
.valid.min_access_size = 1,
.valid.max_access_size = 4,
.endianness = DEVICE_BIG_ENDIAN,
};
static void next_escc_init(DeviceState *pcdev)
{
DeviceState *dev;
@ -1006,6 +1036,10 @@ static void next_pc_realize(DeviceState *dev, Error **errp)
s->scsi_reset = qdev_get_gpio_in(d, 0);
s->scsi_dma = qdev_get_gpio_in(d, 1);
/* Floppy */
memory_region_add_subregion(&s->scrmem, 0x14108,
&s->floppy_mem);
}
static void next_pc_init(Object *obj)
@ -1024,6 +1058,9 @@ static void next_pc_init(Object *obj)
sysbus_init_mmio(sbd, &s->scrmem);
object_initialize_child(obj, "next-scsi", &s->next_scsi, TYPE_NEXT_SCSI);
memory_region_init_io(&s->floppy_mem, OBJECT(s), &next_floppy_ops, s,
"next.floppy", 4);
}
/*