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Enable 8-byte wide MMIO for 16550 serial devices

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Some drivers for the PPMC7400 PowerPC evaluation board accesses the
serial registers through the floating point unit (stfd/ldfd), which is
an 8-byte wide access. This patch enables that behavior.

Signed-off-by: Mike Nawrocki <michael.nawrocki@gtri.gatech.edu>
Message-Id: <20171106161039.32596-1-michael.nawrocki@gtri.gatech.edu>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Mike Nawrocki 2017-11-06 11:10:39 -05:00 committed by Paolo Bonzini
parent d24aaf2a29
commit e5a11847c4
1 changed files with 7 additions and 1 deletions
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8
hw/char/serial.c
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@ -1005,7 +1005,7 @@ static void serial_mm_write(void *opaque, hwaddr addr,
uint64_t value, unsigned size) uint64_t value, unsigned size)
{ {
SerialState *s = opaque; SerialState *s = opaque;
value &= ~0u >> (32 - (size * 8)); value &= 255;
serial_ioport_write(s, addr >> s->it_shift, value, 1); serial_ioport_write(s, addr >> s->it_shift, value, 1);
} }
@ -1014,16 +1014,22 @@ static const MemoryRegionOps serial_mm_ops[3] = {
.read = serial_mm_read, .read = serial_mm_read,
.write = serial_mm_write, .write = serial_mm_write,
.endianness = DEVICE_NATIVE_ENDIAN, .endianness = DEVICE_NATIVE_ENDIAN,
.valid.max_access_size = 8,
.impl.max_access_size = 8,
}, },
[DEVICE_LITTLE_ENDIAN] = { [DEVICE_LITTLE_ENDIAN] = {
.read = serial_mm_read, .read = serial_mm_read,
.write = serial_mm_write, .write = serial_mm_write,
.endianness = DEVICE_LITTLE_ENDIAN, .endianness = DEVICE_LITTLE_ENDIAN,
.valid.max_access_size = 8,
.impl.max_access_size = 8,
}, },
[DEVICE_BIG_ENDIAN] = { [DEVICE_BIG_ENDIAN] = {
.read = serial_mm_read, .read = serial_mm_read,
.write = serial_mm_write, .write = serial_mm_write,
.endianness = DEVICE_BIG_ENDIAN, .endianness = DEVICE_BIG_ENDIAN,
.valid.max_access_size = 8,
.impl.max_access_size = 8,
}, },
}; };