[Qemu-devel] [PATCH] MIPS: DMA support for RC4030 chipset [v5]

[Qemu-devel] [PATCH] MIPS: DMA support for RC4030 chipset [v5]

[Hervé Poussineau]

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Hi,

Attached patch implements DMA support to RC4030 chipset and simplifies 
jazz IO part (at 0xf0000000), where registers contain 16 bit values.
Config register has not a clear meaning (only one value is always valid, 
and sometimes another one), so use a magic value instead.
The patch also wires DMA transfers for the SCSI adapter in the Jazz 
emulation (Mips Magnum 4000 and Acer Pica 61).

Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>

Changes since v1:
- Support reuse of esp callback functions up to DMA engine
- Don't keep in memory the DMA table, but read it when needed

Changes since v2:
- Don't use cpu_single_env in the DMA transfer function, as it is NULL 
in the aio path
- Multiple improvements to the DMA transfer function: report errors to 
the caller, support for non contiguous physical pages...

Changes since v3:
- Mask out higher bits of DMA translation table address

Changes since v4:
- Fix warnings on 64 bit hosts
- Document a change on the config register

Hervé

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Re: [Qemu-devel] [PATCH] MIPS: DMA support for RC4030 chipset [v5]

[Aurelien Jarno]

On Wed, Dec 31, 2008 at 07:42:52AM +0100, Hervé Poussineau wrote:
> Hi,
> 
> Attached patch implements DMA support to RC4030 chipset and simplifies 
> jazz IO part (at 0xf0000000), where registers contain 16 bit values.
> Config register has not a clear meaning (only one value is always valid, 
> and sometimes another one), so use a magic value instead.
> The patch also wires DMA transfers for the SCSI adapter in the Jazz 
> emulation (Mips Magnum 4000 and Acer Pica 61).
> 
> Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
> 
> Changes since v1:
> - Support reuse of esp callback functions up to DMA engine
> - Don't keep in memory the DMA table, but read it when needed
> 
> Changes since v2:
> - Don't use cpu_single_env in the DMA transfer function, as it is NULL 
> in the aio path
> - Multiple improvements to the DMA transfer function: report errors to 
> the caller, support for non contiguous physical pages...
> 
> Changes since v3:
> - Mask out higher bits of DMA translation table address
> 
> Changes since v4:
> - Fix warnings on 64 bit hosts
> - Document a change on the config register
> 

Thanks, applied.

-- 
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