TWxSoftware/twx-linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

sh: uncached mapping helpers.

Browse Source 
This adds some helper routines for uncached mapping support. This
simplifies some of the cases where we need to check the uncached mapping
boundaries in addition to giving us a centralized location for building
more complex manipulation on top of.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt
2010-02-17 16:28:00 +09:00
parent 51becfd962
commit 9edef28653
6 changed files with 58 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/sh/include/asm/ptrace.h
+2 -9
View File
@@ -139,15 +139,8 @@ static inline unsigned long profile_pc(struct pt_regs *regs)
{
unsigned long pc = instruction_pointer(regs);
#ifdef CONFIG_UNCACHED_MAPPING
/*
* If PC points in to the uncached mapping, fix it up and hand
* back the cached equivalent.
*/
if ((pc >= (memory_start + cached_to_uncached)) &&
(pc < (memory_start + cached_to_uncached + uncached_size)))
pc -= cached_to_uncached;
#endif
if (virt_addr_uncached(pc))
return CAC_ADDR(pc);
return pc;
}