diff options
| author | Catalin Marinas <catalin.marinas@arm.com> | 2010-07-01 08:22:48 -0400 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-07-02 05:10:20 -0400 |
| commit | 42c4dafe803dcad82980fd8b0831a89032156f93 (patch) | |
| tree | 4ee6615d25d034420925215ee798924f54b4a0c3 /arch | |
| parent | 2503a5ecd86c002506001eba432c524ea009fe7f (diff) | |
ARM: 6202/1: Do not ARM_DMA_MEM_BUFFERABLE on RealView boards with L210/L220
RealView boards with certain revisions of the L210/L220 cache controller
may have issues (hardware deadlock) with the mandatory barriers (DSB
followed by an L2 cache sync) when ARM_DMA_MEM_BUFFERABLE is enabled.
The patch disables ARM_DMA_MEM_BUFFERABLE for these boards.
Tested-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mm/Kconfig | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig index fc1b2fa59429..101105e52610 100644 --- a/arch/arm/mm/Kconfig +++ b/arch/arm/mm/Kconfig | |||
| @@ -813,6 +813,8 @@ config ARM_L1_CACHE_SHIFT | |||
| 813 | 813 | ||
| 814 | config ARM_DMA_MEM_BUFFERABLE | 814 | config ARM_DMA_MEM_BUFFERABLE |
| 815 | bool "Use non-cacheable memory for DMA" if CPU_V6 && !CPU_V7 | 815 | bool "Use non-cacheable memory for DMA" if CPU_V6 && !CPU_V7 |
| 816 | depends on !(MACH_REALVIEW_PB1176 || REALVIEW_EB_ARM11MP || \ | ||
| 817 | MACH_REALVIEW_PB11MP) | ||
| 816 | default y if CPU_V6 || CPU_V7 | 818 | default y if CPU_V6 || CPU_V7 |
| 817 | help | 819 | help |
| 818 | Historically, the kernel has used strongly ordered mappings to | 820 | Historically, the kernel has used strongly ordered mappings to |