I've noticed arm/mainbus/mainbus_io_asm.S is broken, and would like to
commit a fix something like below.
Are there any problem commiting this?
I greped mainbus_bs in arm32, and arm32 doesn't seem to use these
functions.

Half word load and store are ARMv4 only, but I think it's ok.
They cannot be implemented for v3 and older anyway.


--- /dev/fd/62	Tue Nov 18 20:24:17 1997
+++ /tmp/mainbus_io_asm.S	Sat Mar 10 11:44:42 2001
@@ -44,17 +44,15 @@
  */
 
 ENTRY(mainbus_bs_r_1)
-	ldrb	r0, [r1, r2, lsl #2]
+	ldrb	r0, [r1, r2]
 	mov	pc, lr
 
 ENTRY(mainbus_bs_r_2)
-	ldr	r0, [r1, r2, lsl #2]
-	bic	r0, r0, #0xff000000
-	bic	r0, r0, #0x00ff0000
+	ldrh	r0, [r1, r2]
 	mov	pc, lr
 
 ENTRY(mainbus_bs_r_4)
-	ldr	r0, [r1, r2, lsl #2]
+	ldr	r0, [r1, r2]
 	mov	pc, lr
 
 /*
@@ -62,17 +60,15 @@
  */
 
 ENTRY(mainbus_bs_w_1)
-	strb	r3, [r1, r2, lsl #2]
+	strb	r3, [r1, r2]
 	mov	pc, lr
 
 ENTRY(mainbus_bs_w_2)
-	mov	r3, r3, lsl #16
-	orr	r3, r3, r3, lsr #16
-	str	r3, [r1, r2, lsl #2]
+	strh	r3, [r1, r2]
 	mov	pc, lr
 
 ENTRY(mainbus_bs_w_4)
-	str	r3, [r1, r2, lsl #2]
+	str	r3, [r1, r2]
 	mov	pc, lr
 
 /*

--
IWAMOTO Toshihiro