Add uncached mappings from devicetree nodes similar to regular io mappings.
SPARC is coherent, so there this call is the same as regular of_iomap. Cc: David Miller <[email protected]> Signed-off-by: David Brown <[email protected]> --- v2 - Add implementation for SPARC drivers/of/address.c | 19 +++++++++++++++++++ include/linux/of_address.h | 10 ++++++++++ 2 files changed, 29 insertions(+), 0 deletions(-) diff --git a/drivers/of/address.c b/drivers/of/address.c index 72c33fb..9bee7f8 100644 --- a/drivers/of/address.c +++ b/drivers/of/address.c @@ -613,3 +613,22 @@ void __iomem *of_iomap(struct device_node *np, int index) return ioremap(res.start, resource_size(&res)); } EXPORT_SYMBOL(of_iomap); + +/** + * of_iomap_nocache - Maps the memory mapped IO for a given + * device_node, using ioremap_nocache. + * @device: the device whose io range will be mapped + * @index: index of the io range + * + * Returns a pointer to the mapped memory + */ +void __iomem *of_iomap_nocache(struct device_node *np, int index) +{ + struct resource res; + + if (of_address_to_resource(np, index, &res)) + return NULL; + + return ioremap_nocache(res.start, 1 + res.end - res.start); +} +EXPORT_SYMBOL(of_iomap_nocache); diff --git a/include/linux/of_address.h b/include/linux/of_address.h index 3118623..0e4734b 100644 --- a/include/linux/of_address.h +++ b/include/linux/of_address.h @@ -13,6 +13,16 @@ extern struct device_node *of_find_matching_node_by_address( u64 base_address); extern void __iomem *of_iomap(struct device_node *device, int index); +#ifndef SPARC +extern void __iomem *of_iomap_nocache(struct device_node *device, int index); +#else +static inline void __iomem *of_iomap_nocache(struct device_node *device, + int index) +{ + return of_iomap(device, index); +} +#endif + /* Extract an address from a device, returns the region size and * the address space flags too. The PCI version uses a BAR number * instead of an absolute index -- Sent by an employee of the Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum. -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
