path: root/arch/tile
diff options
authorChris Metcalf <cmetcalf@tilera.com>2012-06-16 16:41:05 -0400
committerChris Metcalf <cmetcalf@tilera.com>2012-07-18 16:40:35 -0400
commitf1006257893917dfb1e0d74cb47b18c0e2908693 (patch)
tree142954273810f9186757e784c468c25f515c5456 /arch/tile
parent47fc28bff82a4dd5f6b41c97e335d10fc78a8e9a (diff)
bounce: allow use of bounce pool via config option
The tilegx USB OHCI support needs the bounce pool since we're not using the IOMMU to handle 32-bit addresses. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Diffstat (limited to 'arch/tile')
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig
index cf4bb69ea8e5..932e4430f7f3 100644
--- a/arch/tile/Kconfig
+++ b/arch/tile/Kconfig
@@ -406,6 +406,12 @@ config TILE_USB
Provides USB host adapter support for the built-in EHCI and OHCI
interfaces on TILE-Gx chips.
+# USB OHCI needs the bounce pool since tilegx will often have more
+# than 4GB of memory, but we don't currently use the IOTLB to present
+# a 32-bit address to OHCI. So we need to use a bounce pool instead.
+ def_bool USB_OHCI_HCD
config HOTPLUG
bool "Support for hot-pluggable devices"