7450 and 86xx L2 cache invalidate bug corrections

The 7610 and related parts have an L2IP bit in the L2CR that is
monitored to signal when the L2 cache invalidate is complete whereas the
7450 and related parts utilize L2I for this purpose. However, the
current code does not account for this difference. Additionally the 86xx
L2 cache invalidate code used an "andi" instruction where an "andis"
instruction should have been used.

This patch addresses both of these bugs.

Signed-off-by: Travis Wheatley <travis.wheatley@freescale.com>
Acked-By: Jon Loeliger <jdl@freescale.com>

cpu/74xx_7xx/cache.S

@@ -329,14 +329,28 @@ _GLOBAL(dcache_status)
 	blr
 
 /*
- * Invalidate L2 cache using L2I and polling L2IP
+ * Invalidate L2 cache using L2I and polling L2IP or L2I
  */
 _GLOBAL(l2cache_invalidate)
 	sync
+	mfspr r3, l2cr
 	oris	r3, r3, L2CR_L2I@h
 	sync
 	mtspr	l2cr, r3
 	sync
+	mfspr r3, PVR
+	sync
+	rlwinm r3, r3, 16,16,31
+	cmpli 0,r3,0x8000  /* 7451, 7441 */
+	beq 0,inv_7450
+	cmpli 0,r3,0x8001  /* 7455, 7445 */
+	beq 0,inv_7450
+	cmpli 0,r3,0x8002  /* 7457, 7447 */
+	beq 0,inv_7450
+	cmpli 0,r3,0x8003  /* 7447A */
+	beq 0,inv_7450
+	cmpli 0,r3,0x8004  /* 7448 */
+	beq 0,inv_7450
 invl2:
 	mfspr	r3, l2cr
 	andi.	r3, r3, L2CR_L2IP
@@ -348,6 +362,11 @@ invl2:
 	mtspr	l2cr, r3
 	sync
 	blr
+inv_7450:
+	mfspr	r3, l2cr
+	andis. r3, r3, L2CR_L2I@h
+	bne inv_7450
+	blr
 
 /*
  * Enable L2 cache

cpu/mpc86xx/cache.S

@@ -338,7 +338,7 @@ _GLOBAL(l2cache_invalidate)
 
 invl2:
 	mfspr	r3, l2cr
-	andi.	r3, r3, L2CR_L2I@h
+	andis.	r3, r3, L2CR_L2I@h
 	bne	invl2
 	blr