Re: [PATCH v2 08/25] powerpc/8xx: Map IMMR area with 512k page at a fixed address

diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index 3fd9083..1f2fdbc 100644
--- a/arch/powerpc/mm/pgtable_32.c
+++ b/arch/powerpc/mm/pgtable_32.c

@@ -49,6 +49,10 @@ EXPORT_SYMBOL(ioremap_bot);	/* aka VMALLOC_END */
 #define HAVE_TLBCAM	1
 #endif
 
+#if CONFIG_PPC_8xx
+#define HAVE_LTLB	1
+#endif
+
 extern char etext[], _stext[];
 
 #ifdef HAVE_BATS

@@ -67,6 +71,14 @@ extern unsigned long p_mapped_by_tlbcam(phys_addr_t pa);
 #define p_mapped_by_tlbcam(x)	(0UL)
 #endif /* HAVE_TLBCAM */
 
+#ifdef HAVE_LTLB
+phys_addr_t v_mapped_by_ltlb(unsigned long va);
+unsigned long p_mapped_by_ltlb(phys_addr_t pa);
+#else /* !HAVE_LTLB */
+#define v_mapped_by_ltlb(x)	(0UL)
+#define p_mapped_by_ltlb(x)	(0UL)
+#endif /* HAVE_LTLB */
+
 static inline unsigned long p_mapped_by_other(phys_addr_t pa)
 {
 	unsigned long v;

@@ -75,6 +87,10 @@ static inline unsigned long p_mapped_by_other(phys_addr_t pa)
 	if (v /*&& p_mapped_by_bats(p+size-1)*/)
 		return v;
 
+	v = p_mapped_by_ltlb(pa);
+	if (v)
+		return v;
+
 	return p_mapped_by_tlbcam(pa);
 }
 

@@ -86,6 +102,10 @@ static inline phys_addr_t v_mapped_by_other(unsigned long va)
 	if (p)
 		return p;
 
+	p = v_mapped_by_ltlb(va);
+	if (p)
+		return p;
+
 	return v_mapped_by_tlbcam(va);
 }