diff options
| author | Green Wan | 2021-09-12 15:05:47 +0200 |
|---|---|---|
| committer | Alistair Francis | 2021-09-20 23:56:49 +0200 |
| commit | e22d90f5f9cac321811e8eddb97d793f5d2a1dea (patch) | |
| tree | 8cd7e8ad6e8bafb420ffd785fd19d0253eb5dfc8 /include/exec | |
| parent | hw/dma: sifive_pdma: claim bit must be set before DMA transactions (diff) | |
| download | qemu-e22d90f5f9cac321811e8eddb97d793f5d2a1dea.tar.gz qemu-e22d90f5f9cac321811e8eddb97d793f5d2a1dea.tar.xz qemu-e22d90f5f9cac321811e8eddb97d793f5d2a1dea.zip | |
hw/dma: sifive_pdma: allow non-multiple transaction size transactions
Real PDMA is able to deal with non-multiple transaction size transactions.
The following result is PDMA tested in U-Boot on Unmatched board:
=> mw.l 0x3000000 0x0 <= Disclaim channel 0
=> mw.l 0x3000000 0x1 <= Claim channel 0
=> mw.l 0x3000004 0x11000000 <= wsize = rsize = 1 (2^1 = 2 bytes)
=> mw.q 0x3000008 0x3 <= NextBytes = 3
=> 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 11000000 00000003 00000000 ................
03000010: 84000000 00000000 84001000 00000000 ................
=> mw.l 0x3000000 0x3 <= Set channel 0 run and claim bits
=> md.l 0x3000000 8 <= Dump PDMA status
03000000: 40000001 11000000 00000003 00000000 ...@............
03000010: 84000000 00000000 84001000 00000000 ................
=> md.l 0x84000000 1; md.l 0x84001000 1 <= Dump src/dst memory contents
84000000: 87345678 xV4.
84001000: 12345678 xV4.
Signed-off-by: Green Wan <green.wan@sifive.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Tested-by: Max Hsu <max.hsu@sifive.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Tested-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Frank Chang <frank.chang@sifive.com>
Message-id: 20210912130553.179501-4-frank.chang@sifive.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Diffstat (limited to 'include/exec')
0 files changed, 0 insertions, 0 deletions