From 9d4ae7276ae26c5bfba6207cf05340af1931d8d4 Mon Sep 17 00:00:00 2001 From: Deepak Saxena Date: Mon, 9 Jan 2006 19:23:11 +0000 Subject: [ARM] 3070/2: Add __ioremap_pfn() API Patch from Deepak Saxena In working on adding 36-bit addressed supersection support to ioremap(), I came to the conclusion that it would be far simpler to do so by just splitting __ioremap() into a main external interface and adding an __ioremap_pfn() function that takes a pfn + offset into the page that __ioremap() can call. This way existing callers of __ioremap() won't have to change their code and 36-bit systems will just call __ioremap_pfn() and we will not have to deal with unsigned long long variables. Note that __ioremap_pfn() should _NOT_ be called directly by drivers but is reserved for use by arch_ioremap() implementations that map 32-bit resource regions into the real 36-bit address and then call this new function. Signed-off-by: Deepak Saxena Signed-off-by: Russell King --- include/asm-arm/io.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'include/asm-arm/io.h') diff --git a/include/asm-arm/io.h b/include/asm-arm/io.h index 0cf4d4f99600..fd0147e52dbb 100644 --- a/include/asm-arm/io.h +++ b/include/asm-arm/io.h @@ -56,7 +56,12 @@ extern void __raw_readsl(const void __iomem *addr, void *data, int longlen); /* * Architecture ioremap implementation. + * + * __ioremap takes CPU physical address. + * + * __ioremap_pfn takes a Page Frame Number and an offset into that page */ +extern void __iomem * __ioremap_pfn(unsigned long, unsigned long, size_t, unsigned long); extern void __iomem * __ioremap(unsigned long, size_t, unsigned long); extern void __iounmap(void __iomem *addr); @@ -261,6 +266,7 @@ out: * * ioremap takes a PCI memory address, as specified in * Documentation/IO-mapping.txt. + * */ #ifndef __arch_ioremap #define ioremap(cookie,size) __ioremap(cookie,size,0) -- cgit v1.2.3-59-g8ed1b