Commit e5a11847 authored by Mike Nawrocki's avatar Mike Nawrocki Committed by Paolo Bonzini
Browse files

Enable 8-byte wide MMIO for 16550 serial devices 



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: default avatarMike Nawrocki <michael.nawrocki@gtri.gatech.edu>
Message-Id: <20171106161039.32596-1-michael.nawrocki@gtri.gatech.edu>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent d24aaf2a

hw/char/serial.c

+7 −1
Original line number Diff line number Diff line
@@ -1005,7 +1005,7 @@ static void serial_mm_write(void *opaque, hwaddr addr, 
                            uint64_t value, unsigned size)

{

    SerialState *s = opaque;

    value &= ~0u >> (32 - (size * 8));

    value &= 255;

    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,

        .write = serial_mm_write,

        .endianness = DEVICE_NATIVE_ENDIAN,

        .valid.max_access_size = 8,

        .impl.max_access_size = 8,

    },

    [DEVICE_LITTLE_ENDIAN] = {

        .read = serial_mm_read,

        .write = serial_mm_write,

        .endianness = DEVICE_LITTLE_ENDIAN,

        .valid.max_access_size = 8,

        .impl.max_access_size = 8,

    },

    [DEVICE_BIG_ENDIAN] = {

        .read = serial_mm_read,

        .write = serial_mm_write,

        .endianness = DEVICE_BIG_ENDIAN,

        .valid.max_access_size = 8,

        .impl.max_access_size = 8,

    },

};