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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-05-27 07:50:33 +0400
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-05-27 10:33:59 +0400
commit8b31e49d1d75729c1da9009664ba52abd1adc628 (patch)
tree046095a0cce051a471c7af93784c024c29a4f99b /arch/powerpc/Kconfig
parentf637a49e507c88354ab32b5d914e06acfb7ee00d (diff)
downloadlinux-8b31e49d1d75729c1da9009664ba52abd1adc628.tar.xz
powerpc: Fix up dma_alloc_coherent() on platforms without cache coherency.
The implementation we just revived has issues, such as using a Kconfig-defined virtual address area in kernel space that nothing actually carves out (and thus will overlap whatever is there), or having some dependencies on being self contained in a single PTE page which adds unnecessary constraints on the kernel virtual address space. This fixes it by using more classic PTE accessors and automatically locating the area for consistent memory, carving an appropriate hole in the kernel virtual address space, leaving only the size of that area as a Kconfig option. It also brings some dma-mask related fixes from the ARM implementation which was almost identical initially but grew its own fixes. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/Kconfig')
-rw-r--r--arch/powerpc/Kconfig13
1 files changed, 0 insertions, 13 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 3bb43adce44d..cdc9a6ff4be8 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -868,19 +868,6 @@ config TASK_SIZE
default "0x80000000" if PPC_PREP || PPC_8xx
default "0xc0000000"
-config CONSISTENT_START_BOOL
- bool "Set custom consistent memory pool address"
- depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE
- help
- This option allows you to set the base virtual address
- of the consistent memory pool. This pool of virtual
- memory is used to make consistent memory allocations.
-
-config CONSISTENT_START
- hex "Base virtual address of consistent memory pool" if CONSISTENT_START_BOOL
- default "0xfd000000" if (NOT_COHERENT_CACHE && 8xx)
- default "0xff100000" if NOT_COHERENT_CACHE
-
config CONSISTENT_SIZE_BOOL
bool "Set custom consistent memory pool size"
depends on ADVANCED_OPTIONS && NOT_COHERENT_CACHE