3 files changed, 28 insertions, 14 deletions

diff --git a/arch/ppc/kernel/setup.c b/arch/ppc/kernel/setup.c
index dc55e1abc45b..0eb0b7085e6a 100644
--- a/arch/ppc/kernel/setup.c
+++ b/arch/ppc/kernel/setup.c
@@ -602,7 +602,19 @@ void parse_bootinfo(struct bi_record *rec)
 #endif /* CONFIG_BLK_DEV_INITRD */
 #ifdef CONFIG_PPC_MULTIPLATFORM
 		case BI_MACHTYPE:
-			_machine = data[0];
+			/* Machine types changed with the merge. Since the
+			 * bootinfo are now deprecated, we can just hard code
+			 * the appropriate conversion here for when we are
+			 * called with yaboot which passes us a machine type
+			 * this way.
+			 */
+			switch(data[0]) {
+			case 1: _machine = _MACH_prep; break;
+			case 2: _machine = _MACH_Pmac; break;
+			case 4: _machine = _MACH_chrp; break;
+			default:
+				_machine = data[0];
+			}
 			break;
 #endif
 		case BI_MEMSIZE:
diff --git a/arch/ppc/mm/init.c b/arch/ppc/mm/init.c
index 99b48abd3296..45f0782059f1 100644
--- a/arch/ppc/mm/init.c
+++ b/arch/ppc/mm/init.c
@@ -597,21 +597,20 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
 
 	if (pfn_valid(pfn)) {
 		struct page *page = pfn_to_page(pfn);
-		if (!PageReserved(page)
-		    && !test_bit(PG_arch_1, &page->flags)) {
-			if (vma->vm_mm == current->active_mm) {
 #ifdef CONFIG_8xx
-			/* On 8xx, cache control instructions (particularly 
-		 	 * "dcbst" from flush_dcache_icache) fault as write 
-			 * operation if there is an unpopulated TLB entry 
-			 * for the address in question. To workaround that, 
-			 * we invalidate the TLB here, thus avoiding dcbst 
-			 * misbehaviour.
-			 */
-				_tlbie(address);
+		/* On 8xx, the TLB handlers work in 2 stages:
+	 	 * First, a zeroed entry is loaded by TLBMiss handler,
+		 * which causes the TLBError handler to be triggered.
+		 * That means the zeroed TLB has to be invalidated
+		 * whenever a page miss occurs.
+		 */
+		_tlbie(address);
 #endif
+		if (!PageReserved(page)
+		    && !test_bit(PG_arch_1, &page->flags)) {
+			if (vma->vm_mm == current->active_mm)
 				__flush_dcache_icache((void *) address);
-			} else
+			else
 				flush_dcache_icache_page(page);
 			set_bit(PG_arch_1, &page->flags);
 		}
diff --git a/arch/ppc/xmon/start.c b/arch/ppc/xmon/start.c
index 98612d420346..c80177f8ec04 100644
--- a/arch/ppc/xmon/start.c
+++ b/arch/ppc/xmon/start.c
@@ -184,7 +184,9 @@ xmon_map_scc(void)
 		sccc = base + (addr & ~PAGE_MASK);
 		sccd = sccc + 0x10;
 
-	} else {
+	}
+#ifdef CONFIG_PPC_CHRP
+	else {
 		base = (volatile unsigned char *) isa_io_base;
 		if (_machine == _MACH_chrp)
 			base = (volatile unsigned char *)
@@ -200,6 +202,7 @@ xmon_map_scc(void)
 		RXRDY = 1;
 		DLAB = 0x80;
 	}
+#endif /* CONFIG_PPC_CHRP */
 #elif defined(CONFIG_GEMINI)
 	/* should already be mapped by the kernel boot */
 	sccc = (volatile unsigned char *) 0xffeffb0d;