kernel.git/arch/ia64/include/asm/io.h, branch linux-4.8.y

ia64: define ioremap_uc()

2016-03-17T22:09:34Z

All architectures now need ioremap_uc(), ia64 seems defines this already through its ioremap_nocache() and it already ensures it *only* uses UC. This is needed since v4.3 to complete an allyesconfig compile on ia64, there were others archs that needed this, and this one seems to have fallen through the cracks. Signed-off-by: Luis R. Rodriguez Reported-by: kbuild test robot Acked-by: Tony Luck Cc: [4.3+] Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

ia64: split off early_ioremap() declarations into asm/early_ioremap.h

2016-01-13T18:35:14Z

Unlike x86, arm64 and ARM, ia64 does not declare its implementations of early_ioremap/early_iounmap/early_memremap/early_memunmap in a header file called This complicates the use of these functions in generic code, since the header cannot be included directly, and we have to rely on transitive includes, which is fragile. So create a for ia64, and move the existing definitions into it. Signed-off-by: Ard Biesheuvel Signed-off-by: Tony Luck

arch: introduce memremap()

2015-08-14T17:23:28Z

Existing users of ioremap_cache() are mapping memory that is known in advance to not have i/o side effects. These users are forced to cast away the __iomem annotation, or otherwise neglect to fix the sparse errors thrown when dereferencing pointers to this memory. Provide memremap() as a non __iomem annotated ioremap_*() in the case when ioremap is otherwise a pointer to cacheable memory. Empirically, ioremap_() call sites are seeking memory-like semantics (e.g. speculative reads, and prefetching permitted). memremap() is a break from the ioremap implementation pattern of adding a new memremap_() for each mapping type and having silent compatibility fall backs. Instead, the implementation defines flags that are passed to the central memremap() and if a mapping type is not supported by an arch memremap returns NULL. We introduce a memremap prototype as a trivial wrapper of ioremap_cache() and ioremap_wt(). Later, once all ioremap_cache() and ioremap_wt() usage has been removed from drivers we teach archs to implement arch_memremap() with the ability to strictly enforce the mapping type. Cc: Arnd Bergmann Reviewed-by: Christoph Hellwig Signed-off-by: Dan Williams

ia64: io: implement dummy relaxed accessor macros for writes

2014-10-20T17:49:17Z

write{b,w,l,q}_relaxed are implemented by some architectures in order to permit memory-mapped I/O accesses with weaker barrier semantics than the non-relaxed variants. This patch adds dummy macros for the write accessors to ia64, which may be able to be optimised in a similar manner to the relaxed read accessors at a later date. Cc: Tony Luck Signed-off-by: Will Deacon

arch/ia64: Define early_memunmap()

2014-07-18T20:23:53Z

This is odd to use early_iounmap() function do tear down mapping created by early_memremap() function, even if it works right now, because they belong to different set of functions. The former is I/O related function and the later is memory related. So, create early_memunmap() macro which in real is early_iounmap(). This thing will help to not confuse code readers longer by mixing functions from different classes. EFI patches following this patch uses that functionality. Signed-off-by: Daniel Kiper Cc: Tony Luck Signed-off-by: Matt Fleming

ia64: add early_memremap() alias for early_ioremap()

2013-09-05T12:29:28Z

early_ioremap() on IA64 chooses its mapping type based on the EFI memory map. This patch adds an alias "early_memremap()" to be used where the targeted location is memory rather than an i/o device. Signed-off-by: Leif Lindholm Acked-by: Tony Luck Signed-off-by: Matt Fleming

/dev/mem: use phys_addr_t for physical addresses

2012-10-24T22:32:50Z

This patch fixes the /dev/mem driver to use phys_addr_t for physical addresses. This is required on PAE systems, especially those that run entirely out of >4G physical memory space. Signed-off-by: Cyril Chemparathy Signed-off-by: Greg Kroah-Hartman

Disintegrate asm/system.h for IA64

2012-03-28T17:30:02Z

Disintegrate asm/system.h for IA64. Signed-off-by: David Howells Acked-by: Tony Luck cc: linux-ia64@vger.kernel.org

ACPI: Use ioremap_cache()

2011-01-07T06:04:19Z

Although the temporary boot-time ACPI table mappings were set up with CPU caching enabled, the permanent table mappings and AML run-time region memory accesses were set up with ioremap(), which on x86 is a synonym for ioremap_nocache(). Changing this to ioremap_cache() improves performance as seen when accessing the tables via acpidump, or /sys/firmware/acpi/tables. It should also improve AML run-time performance. No change on ia64. Reported-by: Jack Steiner Signed-off-by: Len Brown Signed-off-by: Rafael J. Wysocki

implement early_io{re,un}map for ia64

2009-12-16T02:45:10Z

Needed for commit 2c992208 ("intel-iommu: Detect DMAR in hyperspace at probe time.) to build on IA64. Signed-off-by: Tony Luck Signed-off-by: David Woodhouse