* Rob Herring <[email protected]> [110128 07:10]:
> Russell,
> 
> On 01/28/2011 08:10 AM, Russell King - ARM Linux wrote:
> >On Fri, Jan 28, 2011 at 08:00:46AM -0600, Rob Herring wrote:
> >>@@ -206,11 +206,17 @@ __create_page_tables:
> >>  #endif
> >>
> >>    /*
> >>-    * Then map first 1MB of ram in case it contains our boot params.
> >>+    * Then map boot params address in r2 or
> >>+    * the first 1MB of ram if boot params address is not specified.
> >>     */
> >>-   add     r0, r4, #PAGE_OFFSET>>  18
> >>-   orr     r6, r7, r8
> >>-   str     r6, [r0]
> >>+   mov     r0, r2, lsr #20
> >>+   movs    r0, r0, lsl #20
> >>+   moveq   r0, r8
> >>+   sub     r3, r0, r8
> >>+   add     r3, r3, #PAGE_OFFSET
> >>+   add     r3, r4, r3, lsr #18
> >>+   orr     r6, r7, r0
> >>+   str     r6, [r3]
> >
> >Wouldn't:
> >     str     r6, [r4, r3, lsr #18]
> >work here?
> 
> Not on Thumb2:
> 
> arch/arm/kernel/head.S:218: Error: Thumb supports only LSL in
> shifted register indexing -- `str r6,[r4,r3,lsr#18]'

Acked-by: Tony Lindgren <[email protected]>
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