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| author | Vineet Gupta <vgupta@synopsys.com> | 2013-01-22 12:23:57 +0100 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2013-02-15 18:46:15 +0100 |
| commit | fc7943d29e9f6f5f6d4b111120b66ec86501673e (patch) | |
| tree | 04a0c556489438b9c25613345bc1a25cef38819b /arch/arc/Kconfig | |
| parent | ARC: [Review] Multi-platform image #5: NR_IRQS defined by ARC core (diff) | |
| download | linux-fc7943d29e9f6f5f6d4b111120b66ec86501673e.tar.xz linux-fc7943d29e9f6f5f6d4b111120b66ec86501673e.zip | |
ARC: [Review] Multi-platform image #6: cpu-to-dma-addr optional
All the current platforms can work with 0x8000_0000 based dma_addr_t
since the Bus Bridges typically ignore the top bit (the only excpetion
was Angel4 PCI-AHB bridge which we no longer care for).
That way we don't need plat-specific cpu-addr to bus-addr conversion.
Hooks still provided - just in case a platform has an obscure device
which say needs 0 based bus address.
That way <asm/dma_mapping.h> no longer needs to unconditinally include
<plat/dma_addr.h>
Also verfied that on Angel4 board, other peripherals (IDE-disk / EMAC)
work fine with 0x8000_0000 based dma addresses.
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arc/Kconfig')
| -rw-r--r-- | arch/arc/Kconfig | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index ac173687c056..be85ceb8b264 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -119,6 +119,10 @@ config CPU_BIG_ENDIAN help Build kernel for Big Endian Mode of ARC CPU +# If a platform can't work with 0x8000_0000 based dma_addr_t +config ARC_PLAT_NEEDS_CPU_TO_DMA + bool + config SMP bool "Symmetric Multi-Processing (Incomplete)" default n |