how to add DMA support?

[rozhuk.im at gmail.com]

Hi!


> The EHCI and OHCI has its own busmaster and need not be configured to
> use DMA.
> They always use DMA.

May be on some other chips.
On this chip only MAC (NIC) has its own dma, all other subsystems must use
GDMA or HSDMA.
Im looking a way to tell system that chip has GDMA/HSDMA.


For arm I found this:

grep -r "dma_memcpy" /usr/src/sys/arm

/usr/src/sys/arm/xscale/i80321/i80321_dma.c:static int dma_memcpy(void *,
void *, int, int);
/usr/src/sys/arm/xscale/i80321/i80321_dma.c:    _arm_memcpy = dma_memcpy;
/usr/src/sys/arm/xscale/i80321/i80321_dma.c:dma_memcpy(void *dst, void *src,
int len, int flags)

grep -r "_arm_memcpy" /usr/src/sys/arm

/usr/src/sys/arm/include/md_var.h:extern int (*_arm_memcpy)(void *, void *,
int, int);
/usr/src/sys/arm/arm/bcopyinout.S:.L_arm_memcpy:
...


 
--
Rozhuk Ivan
  


> -----Original Message-----
> From: owner-freebsd-arm at freebsd.org [mailto:owner-freebsd-
> arm at freebsd.org] On Behalf Of Hans Petter Selasky
> Sent: Friday, May 13, 2011 3:59 PM
> To: freebsd-arm at freebsd.org; Rozhuk_I at mail.ru
> Subject: Re: how to add DMA support?
> 
> On Thursday 12 May 2011 18:39:00 Rozhuk Ivan wrote:
> > How tell to use DMA in ECHI and OCHI standard USB drives?
> 
> Hi,
> 
> 
> --HPS
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