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hw/char/serial-isa: Implement relocation and enabling/disabling for TYPE_ISA_SERIAL

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The real SuperI/O chips emulated by QEMU allow for relocating and enabling or
disabling their SuperI/O functions via software. So far this is not implemented.
Prepare for that by adding isa_serial_set_{enabled,iobase}.

Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Message-Id: <20240114123911.4877-9-shentey@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Bernhard Beschow 2024-01-14 13:39:08 +01:00 committed by Michael S. Tsirkin
parent 8c4d239139
commit 7812dbc54c
2 changed files with 16 additions and 0 deletions
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14
hw/char/serial-isa.c
View file

@ -184,3 +184,17 @@ void serial_hds_isa_init(ISABus *bus, int from, int to)
}
}
}
void isa_serial_set_iobase(ISADevice *serial, hwaddr iobase)
{
ISASerialState *s = ISA_SERIAL(serial);
serial->ioport_id = iobase;
s->iobase = iobase;
memory_region_set_address(&s->state.io, s->iobase);
}
void isa_serial_set_enabled(ISADevice *serial, bool enabled)
{
memory_region_set_enabled(&ISA_SERIAL(serial)->state.io, enabled);
}

2
include/hw/char/serial.h
View file

@ -112,5 +112,7 @@ SerialMM *serial_mm_init(MemoryRegion *address_space,
#define TYPE_ISA_SERIAL "isa-serial"
void serial_hds_isa_init(ISABus *bus, int from, int to);
void isa_serial_set_iobase(ISADevice *serial, hwaddr iobase);
void isa_serial_set_enabled(ISADevice *serial, bool enabled);
#endif