[src/trunk]: src/sys/arch/arm/cortex Deal with writing bswapped com registers...

[matt <matt%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/904d07cb8f68
branches:  trunk
changeset: 326276:904d07cb8f68
user:      matt <matt%NetBSD.org@localhost>
date:      Fri Jan 24 05:14:11 2014 +0000

description:
Deal with writing bswapped com registers at COM_MULT register widths.

diffstat:

 sys/arch/arm/cortex/a9_mpsubr.S |  41 ++++++++++++++++++++++++++++++++++++++---
 1 files changed, 38 insertions(+), 3 deletions(-)

diffs (63 lines):

diff -r f14f71d455ff -r 904d07cb8f68 sys/arch/arm/cortex/a9_mpsubr.S
--- a/sys/arch/arm/cortex/a9_mpsubr.S   Fri Jan 24 05:13:06 2014 +0000
+++ b/sys/arch/arm/cortex/a9_mpsubr.S   Fri Jan 24 05:14:11 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: a9_mpsubr.S,v 1.11 2013/12/26 00:19:07 joerg Exp $     */
+/*     $NetBSD: a9_mpsubr.S,v 1.12 2014/01/24 05:14:11 matt Exp $      */
 /*-
  * Copyright (c) 2012 The NetBSD Foundation, Inc.
  * All rights reserved.
@@ -227,16 +227,51 @@
 
        mov     r2, #TIMO
        ldr     r3, .Luart0
-1:     ldrb    r1, [r3, #(COM_LSR*COM_MULT)]
+1:
+#if COM_MULT == 1
+       ldrb    r1, [r3, #(COM_LSR*COM_MULT)]
+#else
+#if COM_MULT == 2
+       ldrh    r1, [r3, #(COM_LSR*COM_MULT)]
+#elif COM_MULT == 4
+       ldr     r1, [r3, #(COM_LSR*COM_MULT)]
+#endif
+#ifdef COM_BSWAP
+       lsr     r1, r1, #(COM_MULT-1)*8
+#endif
+#endif
        tst     r1, #LSR_TXRDY
        bne     2f
        subs    r2, r2, #1
        bne     1b
 2:
+#if COM_MULT == 1
        strb    r0, [r3, #COM_DATA]
+#else
+#ifdef COM_BSWAP
+       lsl     r0, r0, #(COM_MULT-1)*8
+#endif
+#if COM_MULT == 2
+       strh    r0, [r3, #COM_DATA]
+#else
+       str     r0, [r3, #COM_DATA]
+#endif
+#endif
 
        mov     r2, #TIMO
-3:     ldrb    r1, [r3, #(COM_LSR*COM_MULT)]
+3:     
+#if COM_MULT == 1
+       ldrb    r1, [r3, #(COM_LSR*COM_MULT)]
+#else
+#if COM_MULT == 2
+       ldrh    r1, [r3, #(COM_LSR*COM_MULT)]
+#elif COM_MULT == 4
+       ldr     r1, [r3, #(COM_LSR*COM_MULT)]
+#endif
+#ifdef COM_BSWAP
+       lsr     r1, r1, #(COM_MULT-1)*8
+#endif
+#endif
        tst     r1, #LSR_TSRE
        bne     4f
        subs    r2, r2, #1