From: Peter Crosthwaite <peter.crosthwa...@xilinx.com>
Do 16 words per fifo flush. Increases performance and decreases
debug verbosity. This data depth has no real hardware analogue,
so just go with something that has reasonable performance.
Signed-off-by: Peter Crosthwaite <peter.crosthwa...@xilinx.com>
Reviewed-by: Peter Maydell <peter.mayd...@linaro.org>
---
hw/ssi/xilinx_spips.c | 11 +++++++----
1 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/hw/ssi/xilinx_spips.c b/hw/ssi/xilinx_spips.c
index ade12fb..6f5faa4 100644
--- a/hw/ssi/xilinx_spips.c
+++ b/hw/ssi/xilinx_spips.c
@@ -608,11 +608,14 @@ lqspi_read(void *opaque, hwaddr addr, unsigned int size)
DB_PRINT_L(0, "starting QSPI data read\n");
- for (i = 0; i < LQSPI_CACHE_SIZE / 4; ++i) {
- tx_data_bytes(s, 0, 4);
+ while (cache_entry < LQSPI_CACHE_SIZE / 4) {
+ for (i = 0; i < 16; ++i) {
+ tx_data_bytes(s, 0, 4);
+ }
xilinx_spips_flush_txfifo(s);
- rx_data_bytes(s, &q->lqspi_buf[cache_entry], 4);
- cache_entry++;
+ for (i = 0; i < 16; ++i) {
+ rx_data_bytes(s, &q->lqspi_buf[cache_entry++], 4);
+ }
}
s->regs[R_LQSPI_STS] &= ~LQSPI_CFG_U_PAGE;
--
1.7.0.4
