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authorRutuja Shah <rutu.shah.26@gmail.com>2016-10-17 19:22:16 +0100
committerPeter Maydell <peter.maydell@linaro.org>2016-10-17 19:22:16 +0100
commitcabbcca0375a96f2e0ccae660ca9dc1510adafbd (patch)
tree51d8d90c2d583b2940dd7754f4b8f1ebd64aae06 /hw/dma
parentbcf48274ba6fbe6158beccd9d4be4c22931f33b9 (diff)
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Reducing stack frame size in stream_process_mem2s()
This patch allocates memory for txbuf in struct Stream rather than the stack. As a result, the stack frame size is reduced of stream_process_mem2s(). Signed-off-by: Rutuja Shah <rutu.shah.26@gmail.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Alistair Francis <alistair.francis@xilinx.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'hw/dma')
-rw-r--r--hw/dma/xilinx_axidma.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/hw/dma/xilinx_axidma.c b/hw/dma/xilinx_axidma.c
index b135a5f..6065689 100644
--- a/hw/dma/xilinx_axidma.c
+++ b/hw/dma/xilinx_axidma.c
@@ -111,6 +111,7 @@ struct Stream {
unsigned int complete_cnt;
uint32_t regs[R_MAX];
uint8_t app[20];
+ unsigned char txbuf[16 * 1024];
};
struct XilinxAXIDMAStreamSlave {
@@ -256,7 +257,6 @@ static void stream_process_mem2s(struct Stream *s, StreamSlave *tx_data_dev,
StreamSlave *tx_control_dev)
{
uint32_t prev_d;
- unsigned char txbuf[16 * 1024];
unsigned int txlen;
if (!stream_running(s) || stream_idle(s)) {
@@ -277,17 +277,17 @@ static void stream_process_mem2s(struct Stream *s, StreamSlave *tx_data_dev,
}
txlen = s->desc.control & SDESC_CTRL_LEN_MASK;
- if ((txlen + s->pos) > sizeof txbuf) {
+ if ((txlen + s->pos) > sizeof s->txbuf) {
hw_error("%s: too small internal txbuf! %d\n", __func__,
txlen + s->pos);
}
cpu_physical_memory_read(s->desc.buffer_address,
- txbuf + s->pos, txlen);
+ s->txbuf + s->pos, txlen);
s->pos += txlen;
if (stream_desc_eof(&s->desc)) {
- stream_push(tx_data_dev, txbuf, s->pos);
+ stream_push(tx_data_dev, s->txbuf, s->pos);
s->pos = 0;
stream_complete(s);
}