OpenE2K/qemu-e2k
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qemu-e2k/hw/dma
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Bin Meng 47b5fbf5a3 hw/dma: sifive_pdma: Don't run DMA when channel is disclaimed 
If Control.run bit is set while not preserving the Control.claim
bit, the DMA transfer shall not be started.

The following result is PDMA tested in U-Boot on Unleashed board:

=> mw.l 0x3000000 0x0                      <= Disclaim channel 0
=> mw.l 0x3000000 0x1                      <= Claim channel 0
=> mw.l 0x3000004 0x55000000               <= wsize = rsize = 5 (2^5 = 32 bytes)
=> mw.q 0x3000008 0x2                      <= NextBytes = 2
=> mw.q 0x3000010 0x84000000               <= NextDestination = 0x84000000
=> mw.q 0x3000018 0x84001000               <= NextSource = 0x84001000
=> mw.l 0x84000000 0x87654321              <= Fill test data to dst
=> mw.l 0x84001000 0x12345678              <= Fill test data to src
=> md.l 0x84000000 1; md.l 0x84001000 1    <= Dump src/dst memory contents
84000000: 87654321                               !Ce.
84001000: 12345678                               xV4.
=> md.l 0x3000000 8                        <= Dump PDMA status
03000000: 00000001 55000000 00000002 00000000    .......U........
03000010: 84000000 00000000 84001000 00000000    ................
=> mw.l 0x3000000 0x2                      <= Set channel 0 run bit only
=> md.l 0x3000000 8                        <= Dump PDMA status
03000000: 00000000 55000000 00000002 00000000    .......U........
03000010: 84000000 00000000 84001000 00000000    ................
=> md.l 0x84000000 1; md.l 0x84001000 1    <= Dump src/dst memory contents
84000000: 87654321                               !Ce.
84001000: 12345678                               xV4.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20210927072124.1564129-2-bmeng.cn@gmail.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
2021-10-07 08:41:33 +10:00
..
bcm2835_dma.c
etraxfs_dma.c
i8257.c
i82374.c Use OBJECT_DECLARE_SIMPLE_TYPE when possible 2020-09-18 14:12:32 -04:00
Kconfig hw/dma: Implement a Xilinx CSU DMA model 2021-03-08 17:20:04 +00:00
meson.build Drop the deprecated unicore32 target 2021-05-12 18:20:52 +02:00
omap_dma.c
pl080.c Do not include exec/address-spaces.h if it's not really necessary 2021-05-02 17:24:51 +02:00
pl330.c hw/dma/pl330: Add memory region to replace default 2021-08-25 10:48:50 +01:00
pxa2xx_dma.c hw/arm: Constify VMStateDescription 2021-05-02 17:24:50 +02:00
rc4030.c Use OBJECT_DECLARE_SIMPLE_TYPE when possible 2020-09-18 14:12:32 -04:00
sifive_pdma.c hw/dma: sifive_pdma: Don't run DMA when channel is disclaimed 2021-10-07 08:41:33 +10:00
soc_dma.c
sparc32_dma.c esp: rename existing ESP QOM type to SYSBUS_ESP 2021-03-07 10:39:05 +00:00
trace-events docs: fix references to docs/devel/tracing.rst 2021-06-02 06:51:09 +02:00
trace.h
xilinx_axidma.c hw/dma/xilinx_axidma: Rename StreamSlave as StreamSink 2020-12-10 12:15:04 -05:00
xlnx_csu_dma.c hw/dma/xlnx_csu_dma: Always expect 'dma' link property to be set 2021-08-26 17:01:59 +01:00
xlnx_dpdma.c
xlnx-zdma.c hw/dma/xlnx-zdma Always expect 'dma' link property to be set 2021-08-26 17:01:59 +01:00
xlnx-zynq-devcfg.c