Gitweb: http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=14b3d9...
Commit: 14b3d926a22b89f779229f88ed16a76b6b641b1c
Parent: 72fda1148e14d2f06d8653c26f579b7d2dabba57
Author: Valentine Barshak <vbarshak@ru.mvista.com>
AuthorDate: Sat Dec 22 03:24:02 2007 +1100
Committer: Josh Boyer <jwboyer@linux.vnet.ibm.com>
CommitDate: Sun Dec 23 13:35:58 2007 -0600
[POWERPC] 4xx: update 440EP(x)/440GR(x) identical PVR issue workaround
Renaming the CPU nodes with generic names put the CPU model in
the "model" property and thus broke the PowerPC 440EP(x)/440GR(x)
identical PVR workaround. The updates it to use the new model property
for CPU identification.
Signed-off-by: Valentine Barshak <vbarshak@ru.mvista.com>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
---
arch/powerpc/kernel/prom.c | 37 +++++++++++++++++++++++++------------
1 files changed, 25 insertions(+), 12 deletions(-)
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 6c2d883..8b5efbc 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -614,6 +614,29 @@ static struct feature_property {
#endif /* CONFIG_PPC64 */
};
+#if defined(CONFIG_44x) && defined(CONFIG_PPC_FPU)
+static inline void identical_pvr_fixup(unsigned long node)
+{
+ unsigned int pvr;
+ char *model = of_get_flat_dt_prop(node, "model", NULL);
+
+ /*
+ * Since 440GR(x)/440EP(x) processors have the same pvr,
+ * we check the node path and set bit 28 in the cur_cpu_spec
+ * pvr for EP(x) processor version. This bit is always 0 in
+ * the "real" pvr. Then we call identify_cpu again with
+ * the new logical pvr to enable FPU support.
+ */
+ if (model && strstr(model, "440EP")) {
+ pvr = cur_cpu_spec->pvr_value | 0x8;
+ identify_cpu(0, pvr);
+ DBG("Using logical pvr %x for %s\n", pvr, model);
+ }
+}
+#else
+#define identical_pvr_fixup(node) do { } while(0)
+#endif
+
static void __init check_cpu_feature_properties(unsigned long node)
{
unsigned long i;
@@ -711,18 +734,8 @@ static int __init early_init_dt_scan_cpus(unsigned long node,
prop = of_get_flat_dt_prop(node, "cpu-version", NULL);
if (prop && (*prop & 0xff000000) == 0x0f000000)
identify_cpu(0, *prop);
-#if defined(CONFIG_44x) && defined(CONFIG_PPC_FPU)
- /*
- * Since 440GR(x)/440EP(x) processors have the same pvr,
- * we check the node path and set bit 28 in the cur_cpu_spec
- * pvr for EP(x) processor version. This bit is always 0 in
- * the "real" pvr. Then we call identify_cpu again with
- * the new logical pvr to enable FPU support.
- */
- if (strstr(uname, "440EP")) {
- identify_cpu(0, cur_cpu_spec->pvr_value | 0x8);
- }
-#endif
+
+ identical_pvr_fixup(node);
}
check_cpu_feature_properties(node);
-
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