hwstub: major improvement in the stub and the tools

Fix the stub in many way to correctly detect the STMP family and
act upon that. Drop some unused commands and bump version.
Rewrite the tool to allows scripting in lua and load the register
description from an XML file using the regtools. Introduce a new
tool to load and run code using the hwstub (either binary format
or Rockbox additive scramble format). Also switch to an optimise
version of the memcpy/move/set functions to correctly handle
alignement issue (like writing a full word/half-word when
possible for registers which is crucial)

Change-Id: Id1d5cfe0b1b47e8b43900d32c5cd6eafae6414f6

1 files changed, 98 insertions, 0 deletions

diff --git a/utils/hwstub/stmp/memset.S b/utils/hwstub/stmp/memset.S
new file mode 100644
index 0000000000..682da874ce
--- /dev/null
+++ b/utils/hwstub/stmp/memset.S
@@ -0,0 +1,98 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2006 by Thom Johansen
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "config.h"
+
+    .section    .icode,"ax",%progbits
+
+    .align      2
+
+/*  The following code is based on code found in Linux kernel version 2.6.15.3
+ *  linux/arch/arm/lib/memset.S
+ *
+ *  Copyright (C) 1995-2000 Russell King
+ */
+
+/* This code will align a pointer for memset, if needed */
+1:      cmp     r2, #4                  @ 1 do we have enough
+        blt     5f                      @ 1 bytes to align with?
+        cmp     r3, #2                  @ 1
+        strgtb  r1, [r0, #-1]!          @ 1
+        strgeb  r1, [r0, #-1]!          @ 1
+        strb    r1, [r0, #-1]!          @ 1
+        sub     r2, r2, r3              @ 1 r2 = r2 - r3
+        b 2f
+
+        .global     memset
+        .type       memset,%function
+memset:
+        add     r0, r0, r2              @ we'll write backwards in memory
+        ands    r3, r0, #3              @ 1 unaligned?
+        bne     1b                      @ 1
+2:
+/*
+ * we know that the pointer in r0 is aligned to a word boundary.
+ */
+        orr     r1, r1, r1, lsl #8
+        orr     r1, r1, r1, lsl #16
+        mov     r3, r1
+        cmp     r2, #16
+        blt     5f
+/*
+ * We need an extra register for this loop - save the return address and
+ * use the LR
+ */
+        str     lr, [sp, #-4]!
+        mov     ip, r1
+        mov     lr, r1
+
+3:      subs    r2, r2, #64
+        stmgedb r0!, {r1, r3, ip, lr}   @ 64 bytes at a time.
+        stmgedb r0!, {r1, r3, ip, lr}
+        stmgedb r0!, {r1, r3, ip, lr}
+        stmgedb r0!, {r1, r3, ip, lr}
+        bgt     3b
+        ldrpc   cond=eq                 @ Now <64 bytes to go.
+/*
+ * No need to correct the count; we're only testing bits from now on
+ */
+        tst     r2, #32
+        stmnedb r0!, {r1, r3, ip, lr}
+        stmnedb r0!, {r1, r3, ip, lr}
+        tst     r2, #16
+        stmnedb r0!, {r1, r3, ip, lr}
+        ldr     lr, [sp], #4
+
+5:      tst     r2, #8
+        stmnedb r0!, {r1, r3}
+        tst     r2, #4
+        strne   r1, [r0, #-4]!
+/*
+ * When we get here, we've got less than 4 bytes to zero.  We
+ * may have an unaligned pointer as well.
+ */
+6:      tst     r2, #2
+        strneb  r1, [r0, #-1]!
+        strneb  r1, [r0, #-1]!
+        tst     r2, #1
+        strneb  r1, [r0, #-1]!
+        bx      lr
+.end:
+        .size   memset,.end-memset