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-rw-r--r--arch/openrisc/mm/init.c17
1 files changed, 14 insertions, 3 deletions
diff --git a/arch/openrisc/mm/init.c b/arch/openrisc/mm/init.c
index 79dea97..e7fdc50 100644
--- a/arch/openrisc/mm/init.c
+++ b/arch/openrisc/mm/init.c
@@ -167,15 +167,26 @@ void __init paging_init(void)
unsigned long *dtlb_vector = __va(0x900);
unsigned long *itlb_vector = __va(0xa00);
+ printk(KERN_INFO "itlb_miss_handler %p\n", &itlb_miss_handler);
+ *itlb_vector = ((unsigned long)&itlb_miss_handler -
+ (unsigned long)itlb_vector) >> 2;
+
+ /* Soft ordering constraint to ensure that dtlb_vector is
+ * the last thing updated
+ */
+ barrier();
+
printk(KERN_INFO "dtlb_miss_handler %p\n", &dtlb_miss_handler);
*dtlb_vector = ((unsigned long)&dtlb_miss_handler -
(unsigned long)dtlb_vector) >> 2;
- printk(KERN_INFO "itlb_miss_handler %p\n", &itlb_miss_handler);
- *itlb_vector = ((unsigned long)&itlb_miss_handler -
- (unsigned long)itlb_vector) >> 2;
}
+ /* Soft ordering constraint to ensure that cache invalidation and
+ * TLB flush really happen _after_ code has been modified.
+ */
+ barrier();
+
/* Invalidate instruction caches after code modification */
mtspr(SPR_ICBIR, 0x900);
mtspr(SPR_ICBIR, 0xa00);
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