diff options
Diffstat (limited to 'hw/dma/i8257.c')
| -rw-r--r-- | hw/dma/i8257.c | 20 |
1 files changed, 13 insertions, 7 deletions
diff --git a/hw/dma/i8257.c b/hw/dma/i8257.c index ef15c06d77..1b3435ab58 100644 --- a/hw/dma/i8257.c +++ b/hw/dma/i8257.c @@ -292,12 +292,6 @@ static uint64_t i8257_read_cont(void *opaque, hwaddr nport, unsigned size) return val; } -static IsaDmaTransferMode i8257_dma_get_transfer_mode(IsaDma *obj, int nchan) -{ - I8257State *d = I8257(obj); - return (d->regs[nchan & 3].mode >> 2) & 3; -} - static bool i8257_dma_has_autoinitialization(IsaDma *obj, int nchan) { I8257State *d = I8257(obj); @@ -400,6 +394,11 @@ static void i8257_dma_register_channel(IsaDma *obj, int nchan, r->opaque = opaque; } +static bool i8257_is_verify_transfer(I8257Regs *r) +{ + return (r->mode & 0x0c) == 0; +} + static int i8257_dma_read_memory(IsaDma *obj, int nchan, void *buf, int pos, int len) { @@ -407,6 +406,10 @@ static int i8257_dma_read_memory(IsaDma *obj, int nchan, void *buf, int pos, I8257Regs *r = &d->regs[nchan & 3]; hwaddr addr = ((r->pageh & 0x7f) << 24) | (r->page << 16) | r->now[ADDR]; + if (i8257_is_verify_transfer(r)) { + return len; + } + if (r->mode & 0x20) { int i; uint8_t *p = buf; @@ -431,6 +434,10 @@ static int i8257_dma_write_memory(IsaDma *obj, int nchan, void *buf, int pos, I8257Regs *r = &s->regs[nchan & 3]; hwaddr addr = ((r->pageh & 0x7f) << 24) | (r->page << 16) | r->now[ADDR]; + if (i8257_is_verify_transfer(r)) { + return len; + } + if (r->mode & 0x20) { int i; uint8_t *p = buf; @@ -597,7 +604,6 @@ static void i8257_class_init(ObjectClass *klass, void *data) dc->vmsd = &vmstate_i8257; device_class_set_props(dc, i8257_properties); - idc->get_transfer_mode = i8257_dma_get_transfer_mode; idc->has_autoinitialization = i8257_dma_has_autoinitialization; idc->read_memory = i8257_dma_read_memory; idc->write_memory = i8257_dma_write_memory; |