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sh: Expose physical addressing mode through cpuinfo.

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CPUs can be in either the legacy 29-bit or 32-bit physical addressing
modes. This follows the x86 approach of tracking the phys bits in cpuinfo
and exposing it to userspace through procfs.

This change was requested to permit kexec-tools to detect the physical
addressing mode in order to determine the appropriate address mangling.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2010-10-26 14:44:58 +09:00
parent b18cae4224
commit 2f98492c53
3 changed files with 6 additions and 0 deletions
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1
arch/sh/include/asm/processor.h
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@ -89,6 +89,7 @@ struct sh_cpuinfo {
struct task_struct *idle;
#endif
unsigned int phys_bits;
unsigned long flags;
} __attribute__ ((aligned(L1_CACHE_BYTES)));