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| author | Peter Maydell <peter.maydell@linaro.org> | 2013-06-28 13:51:59 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2013-07-15 16:17:44 +0100 |
| commit | 7648673636bbd7dcb9abf3cc87a8ba7a65b85436 (patch) | |
| tree | b147733970f3c0de287ba8f07f7b7fa483e57b95 /hw/dma | |
| parent | 8827b0fb66cab9f7978c4e66dad4cf3c0989a72e (diff) | |
| download | qemu-7648673636bbd7dcb9abf3cc87a8ba7a65b85436.zip qemu-7648673636bbd7dcb9abf3cc87a8ba7a65b85436.tar.gz qemu-7648673636bbd7dcb9abf3cc87a8ba7a65b85436.tar.bz2 | |
hw/dma/omap_dma: Fix bugs with DMA requests above 32
The drqbmp field of struct soc_dma_s is a uint64_t; however several
places in the code attempt to set bits in it using "(1 << drq)",
which will fail if drq is large enough that the 1 bit gets shifted
off the top of a 32 bit integer. Change these to "(1ULL << drq)" so
that the promotion to 64 bit happens before the shift rather than
afterwards.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1372423919-5669-1-git-send-email-peter.maydell@linaro.org
Diffstat (limited to 'hw/dma')
| -rw-r--r-- | hw/dma/omap_dma.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/hw/dma/omap_dma.c b/hw/dma/omap_dma.c index a81ffc4..0e8cccd 100644 --- a/hw/dma/omap_dma.c +++ b/hw/dma/omap_dma.c @@ -248,7 +248,7 @@ static void omap_dma_deactivate_channel(struct omap_dma_s *s, /* Don't deactive the channel if it is synchronized and the DMA request is active */ - if (ch->sync && ch->enable && (s->dma->drqbmp & (1 << ch->sync))) + if (ch->sync && ch->enable && (s->dma->drqbmp & (1ULL << ch->sync))) return; if (ch->active) { @@ -268,8 +268,9 @@ static void omap_dma_enable_channel(struct omap_dma_s *s, /* TODO: theoretically if ch->sync && ch->prefetch && * !s->dma->drqbmp[ch->sync], we should also activate and fetch * from source and then stall until signalled. */ - if ((!ch->sync) || (s->dma->drqbmp & (1 << ch->sync))) + if ((!ch->sync) || (s->dma->drqbmp & (1ULL << ch->sync))) { omap_dma_activate_channel(s, ch); + } } } @@ -1551,12 +1552,12 @@ static void omap_dma_request(void *opaque, int drq, int req) struct omap_dma_s *s = (struct omap_dma_s *) opaque; /* The request pins are level triggered in QEMU. */ if (req) { - if (~s->dma->drqbmp & (1 << drq)) { - s->dma->drqbmp |= 1 << drq; + if (~s->dma->drqbmp & (1ULL << drq)) { + s->dma->drqbmp |= 1ULL << drq; omap_dma_process_request(s, drq); } } else - s->dma->drqbmp &= ~(1 << drq); + s->dma->drqbmp &= ~(1ULL << drq); } /* XXX: this won't be needed once soc_dma knows about clocks. */ |