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[MIPS] Add some debugfs files to debug unaligned accesses

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Currently a number of unaligned instructions is counted but not used.
Add /debug/mips/unaligned_instructions file to show the value.

And add /debug/mips/unaligned_action to control behavior upon an
unaligned access.  Possible actions are:

0: silently fixup the unaligned access.
1: send SIGBUS.
2: dump registers, process name, etc. and fixup.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Atsushi Nemoto
2007-06-30 00:55:48 +09:00
committed by Ralf Baechle
parent 2db30150fe
commit 6312e0ee45
2 changed files with 54 additions and 3 deletions
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16
arch/mips/kernel/setup.c
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@@ -20,6 +20,7 @@
#include <linux/highmem.h>
#include <linux/console.h>
#include <linux/pfn.h>
#include <linux/debugfs.h>
#include <asm/addrspace.h>
#include <asm/bootinfo.h>
@@ -574,3 +575,18 @@ __setup("nodsp", dsp_disable);
unsigned long kernelsp[NR_CPUS];
unsigned long fw_arg0, fw_arg1, fw_arg2, fw_arg3;
#ifdef CONFIG_DEBUG_FS
struct dentry *mips_debugfs_dir;
static int __init debugfs_mips(void)
{
struct dentry *d;
d = debugfs_create_dir("mips", NULL);
if (IS_ERR(d))
return PTR_ERR(d);
mips_debugfs_dir = d;
return 0;
}
arch_initcall(debugfs_mips);
#endif