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[Qemu-devel] [PATCH arm-devs v1 14/15] xilinx_spips: lqspi: Push more da
From: |
Peter Crosthwaite |
Subject: |
[Qemu-devel] [PATCH arm-devs v1 14/15] xilinx_spips: lqspi: Push more data to tx-fifo |
Date: |
Wed, 3 Apr 2013 14:33:06 +1000 |
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 <address@hidden>
---
hw/xilinx_spips.c | 11 +++++++----
1 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/hw/xilinx_spips.c b/hw/xilinx_spips.c
index 5ac0f64..32d8db8 100644
--- a/hw/xilinx_spips.c
+++ b/hw/xilinx_spips.c
@@ -571,11 +571,14 @@ 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_CONFIG] |= CS;
--
1.7.0.4
- [Qemu-devel] [PATCH arm-devs v1 08/15] xilinx_spips: Add automatic start support, (continued)
- [Qemu-devel] [PATCH arm-devs v1 08/15] xilinx_spips: Add automatic start support, Peter Crosthwaite, 2013/04/03
- [Qemu-devel] [PATCH arm-devs v1 09/15] xilinx_spips: Implement automatic CS, Peter Crosthwaite, 2013/04/03
- [Qemu-devel] [PATCH arm-devs v1 10/15] xilinx_spips: Fix CTRL register RW bits, Peter Crosthwaite, 2013/04/03
- [Qemu-devel] [PATCH arm-devs v1 11/15] xilinx_spips: Fix striping behaviour, Peter Crosthwaite, 2013/04/03
- [Qemu-devel] [PATCH arm-devs v1 12/15] xilinx_spips: Debug msgs for Snoop state, Peter Crosthwaite, 2013/04/03
- [Qemu-devel] [PATCH arm-devs v1 13/15] xilinx_spips: Multiple debug verbosity levels, Peter Crosthwaite, 2013/04/03
- [Qemu-devel] [PATCH arm-devs v1 14/15] xilinx_spips: lqspi: Push more data to tx-fifo,
Peter Crosthwaite <=
- [Qemu-devel] [PATCH arm-devs v1 15/15] xilinx_spips: lqspi: Fix byte/misaligned access, Peter Crosthwaite, 2013/04/03