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| author | Green Wan <green.wan@sifive.com> | 2021-09-12 21:05:47 +0800 |
|---|---|---|
| committer | Alistair Francis <alistair.francis@wdc.com> | 2021-09-21 07:56:49 +1000 |
| commit | e22d90f5f9cac321811e8eddb97d793f5d2a1dea (patch) | |
| tree | 8cd7e8ad6e8bafb420ffd785fd19d0253eb5dfc8 /linux-user/arm/cpu_loop.c | |
| parent | 9a8c26c08c3fe6c80e47b75369a34e6e7f6cd11f (diff) | |
| download | focaccia-qemu-e22d90f5f9cac321811e8eddb97d793f5d2a1dea.tar.gz focaccia-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 'linux-user/arm/cpu_loop.c')
0 files changed, 0 insertions, 0 deletions