[MIPS] Hook for platforms to define cachability of /dev/mem regions (24e9d0b9) · Commits · e / devices / android_kernel_teracube_2e

arch/mips/mm/cache.c

+10 −0

Original line number	Original line	Diff line number	Diff line
	@@ -6,6 +6,8 @@
	* Copyright (C) 1994 - 2003, 07 by Ralf Baechle (ralf@linux-mips.org)		* Copyright (C) 1994 - 2003, 07 by Ralf Baechle (ralf@linux-mips.org)
	* Copyright (C) 2007 MIPS Technologies, Inc.		* Copyright (C) 2007 MIPS Technologies, Inc.
	*/		*/
			#include <linux/fs.h>
			#include <linux/fcntl.h>
	#include <linux/init.h>		#include <linux/init.h>
	#include <linux/kernel.h>		#include <linux/kernel.h>
	#include <linux/module.h>		#include <linux/module.h>
	@@ -164,3 +166,11 @@ void __init cpu_cache_init(void)

	panic(cache_panic);		panic(cache_panic);
	}		}

			int __weak __uncached_access(struct file *file, unsigned long addr)
			{
			if (file->f_flags & O_SYNC)
			return 1;

			return addr >= __pa(high_memory);
			}

+7 −0

Original line number	Original line	Diff line number	Diff line
	@@ -75,6 +75,13 @@ static inline int uncached_access(struct file *file, unsigned long addr)
	* On ia64, we ignore O_SYNC because we cannot tolerate memory attribute aliases.		* On ia64, we ignore O_SYNC because we cannot tolerate memory attribute aliases.
	*/		*/
	return !(efi_mem_attributes(addr) & EFI_MEMORY_WB);		return !(efi_mem_attributes(addr) & EFI_MEMORY_WB);
			#elif defined(CONFIG_MIPS)
			{
			extern int __uncached_access(struct file *file,
			unsigned long addr);

			return __uncached_access(file, addr);
			}
	#else		#else
	/*		/*
	* Accessing memory above the top the kernel knows about or through a file pointer		* Accessing memory above the top the kernel knows about or through a file pointer