Re: [PATCH v2 1/9] arm: mvebu: Limit the DMA zone when LPAE is selected

2013-04-05 Thread Gregory CLEMENT
On 04/05/2013 10:41 PM, Arnd Bergmann wrote: > On Friday 05 April 2013, Gregory CLEMENT wrote: >> When LPAE is activated on Armada XP, all registers and IOs are still >> 32bit, the 40bit extension is on the CPU to DRAM path (windows) only. >> That means that all the DMA transfer are restricted to

Re: [PATCH v2 1/9] arm: mvebu: Limit the DMA zone when LPAE is selected

2013-04-05 Thread Arnd Bergmann
On Friday 05 April 2013, Gregory CLEMENT wrote: > When LPAE is activated on Armada XP, all registers and IOs are still > 32bit, the 40bit extension is on the CPU to DRAM path (windows) only. > That means that all the DMA transfer are restricted to the low 32 bits > address space. This is

[PATCH v2 1/9] arm: mvebu: Limit the DMA zone when LPAE is selected

2013-04-05 Thread Gregory CLEMENT
When LPAE is activated on Armada XP, all registers and IOs are still 32bit, the 40bit extension is on the CPU to DRAM path (windows) only. That means that all the DMA transfer are restricted to the low 32 bits address space. This is limitation is achieved by selecting ZONE_DMA. Signed-off-by:

[PATCH v2 1/9] arm: mvebu: Limit the DMA zone when LPAE is selected

2013-04-05 Thread Gregory CLEMENT
When LPAE is activated on Armada XP, all registers and IOs are still 32bit, the 40bit extension is on the CPU to DRAM path (windows) only. That means that all the DMA transfer are restricted to the low 32 bits address space. This is limitation is achieved by selecting ZONE_DMA. Signed-off-by:

Re: [PATCH v2 1/9] arm: mvebu: Limit the DMA zone when LPAE is selected

2013-04-05 Thread Arnd Bergmann
On Friday 05 April 2013, Gregory CLEMENT wrote: When LPAE is activated on Armada XP, all registers and IOs are still 32bit, the 40bit extension is on the CPU to DRAM path (windows) only. That means that all the DMA transfer are restricted to the low 32 bits address space. This is limitation is

Re: [PATCH v2 1/9] arm: mvebu: Limit the DMA zone when LPAE is selected

2013-04-05 Thread Gregory CLEMENT
On 04/05/2013 10:41 PM, Arnd Bergmann wrote: On Friday 05 April 2013, Gregory CLEMENT wrote: When LPAE is activated on Armada XP, all registers and IOs are still 32bit, the 40bit extension is on the CPU to DRAM path (windows) only. That means that all the DMA transfer are restricted to the low