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| author | Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> | 2020-06-23 21:49:30 +0100 |
|---|---|---|
| committer | Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> | 2020-06-26 10:13:52 +0100 |
| commit | 45c9d721ef9ea4e50dbede53bc97922767db70b8 (patch) | |
| tree | a7a2631b95ed15609be9df6e77a3bacf2d8cbeb8 /hw | |
| parent | 4e5df0369fb5a49ed26518dccffeb03a252352db (diff) | |
| download | qemu-45c9d721ef9ea4e50dbede53bc97922767db70b8.zip qemu-45c9d721ef9ea4e50dbede53bc97922767db70b8.tar.gz qemu-45c9d721ef9ea4e50dbede53bc97922767db70b8.tar.bz2 | |
cuda: add adb_autopoll_block() and adb_autopoll_unblock() functions
Ensure that the CUDA buffer is protected from autopoll requests overwriting
its contents whilst existing CUDA requests are in progress.
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Tested-by: Finn Thain <fthain@telegraphics.com.au>
Acked-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20200623204936.24064-17-mark.cave-ayland@ilande.co.uk>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/misc/macio/cuda.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/hw/misc/macio/cuda.c b/hw/misc/macio/cuda.c index b7071e8..5bbc777 100644 --- a/hw/misc/macio/cuda.c +++ b/hw/misc/macio/cuda.c @@ -116,6 +116,7 @@ static void cuda_update(CUDAState *s) { MOS6522CUDAState *mcs = &s->mos6522_cuda; MOS6522State *ms = MOS6522(mcs); + ADBBusState *adb_bus = &s->adb_bus; int packet_received, len; packet_received = 0; @@ -126,6 +127,9 @@ static void cuda_update(CUDAState *s) /* data output */ if ((ms->b & (TACK | TIP)) != (s->last_b & (TACK | TIP))) { if (s->data_out_index < sizeof(s->data_out)) { + if (s->data_out_index == 0) { + adb_autopoll_block(adb_bus); + } trace_cuda_data_send(ms->sr); s->data_out[s->data_out_index++] = ms->sr; cuda_delay_set_sr_int(s); @@ -140,6 +144,7 @@ static void cuda_update(CUDAState *s) /* indicate end of transfer */ if (s->data_in_index >= s->data_in_size) { ms->b = (ms->b | TREQ); + adb_autopoll_unblock(adb_bus); } cuda_delay_set_sr_int(s); } |