sh: Expose physical addressing mode through cpuinfo.
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>
diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
index 4e27846..82c0a0c 100644
--- a/arch/sh/kernel/setup.c
+++ b/arch/sh/kernel/setup.c
@@ -52,6 +52,7 @@
.type = CPU_SH_NONE,
.family = CPU_FAMILY_UNKNOWN,
.loops_per_jiffy = 10000000,
+ .phys_bits = MAX_PHYSMEM_BITS,
},
};
EXPORT_SYMBOL(cpu_data);
@@ -432,6 +433,8 @@
if (c->flags & CPU_HAS_L2_CACHE)
show_cacheinfo(m, "scache", c->scache);
+ seq_printf(m, "address sizes\t: %u bits physical\n", c->phys_bits);
+
seq_printf(m, "bogomips\t: %lu.%02lu\n",
c->loops_per_jiffy/(500000/HZ),
(c->loops_per_jiffy/(5000/HZ)) % 100);