Re: [GIT PULL] Renesas ARM Based SoC Soc Updates for v3.19

[Arnd Bergmann <arnd@arndb.de>]

On Thursday 27 November 2014 22:48:12 Laurent Pinchart wrote:
> Hi Arnd,
> 
> On Wednesday 19 November 2014 22:05:56 Arnd Bergmann wrote:
> > On Tuesday 04 November 2014, Simon Horman wrote:
> > > ----------------------------------------------------------------
> > > Renesas ARM Based SoC Soc Updates for v3.19
> > > 
> > > * Select CONFIG_ZONE_DMA when CONFIG_ARM_LPAE is enabled
> > > * Add CA7 arch_timer initialization for r8a7794
> > > * Handle CA7 arch timer delay
> > > * Add shmobile_init_late() to sh7372
> > > 
> > >   - This is consistent with other shmobile SoCs
> > 
> > Pulled into next/soc.
> > 
> > Note that the CONFIG_ZONE_DMA change might not be the best solution, we
> > should probably have CONFIG_ZONE_DMA32 instead as some other architectures
> > do, so you can use the entire lowmem area for DMA allocations.
> 
> I might be mistaken, but if the machine description doesn't set the 
> dma_zone_size field, arm_dma_zone_size and arm_dma_limit are set to 0 and 
> 0xffffffff respectively. This results in MAX_DMA_ADDRESS being set to 
> 0xffffffff. Doesn't that allow using the entire lowmem area for DMA 
> allocations ?

Sorry for the late reply. I hadn't actually looked at the details this
far, and I would assume that you are right.

	Arnd