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| author | Frank Chang <frank.chang@sifive.com> | 2021-09-12 21:05:48 +0800 |
|---|---|---|
| committer | Alistair Francis <alistair.francis@wdc.com> | 2021-09-21 07:56:49 +1000 |
| commit | ae000c5f658d3636ebf19b7a8c819dce618780c4 (patch) | |
| tree | 105306165d45f12db878662973469bc7bf89e540 /linux-user/arm/cpu_loop.c | |
| parent | e22d90f5f9cac321811e8eddb97d793f5d2a1dea (diff) | |
| download | focaccia-qemu-ae000c5f658d3636ebf19b7a8c819dce618780c4.tar.gz focaccia-qemu-ae000c5f658d3636ebf19b7a8c819dce618780c4.zip | |
hw/dma: sifive_pdma: don't set Control.error if 0 bytes to transfer
Real PDMA doesn't set Control.error if there are 0 bytes to be transferred. The DMA transfer is still success. 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 0x55000000 <= wsize = rsize = 5 (2^5 = 32 bytes) => mw.q 0x3000008 0x0 <= NextBytes = 0 => 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 00000000 00000000 .......U........ 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 55000000 00000000 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: 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> Message-id: 20210912130553.179501-5-frank.chang@sifive.com Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Diffstat (limited to 'linux-user/arm/cpu_loop.c')
0 files changed, 0 insertions, 0 deletions