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, 190 insertions, 0 deletions

diff --git a/utils/hwstub/stmp/memmove.S b/utils/hwstub/stmp/memmove.S
new file mode 100644
index 0000000000..d8cab048be
--- /dev/null
+++ b/utils/hwstub/stmp/memmove.S
@@ -0,0 +1,190 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2006 Free Software Foundation, Inc.
+ * This file was originally part of the GNU C Library
+ * Contributed to glibc by MontaVista Software, Inc. (written by Nicolas Pitre)
+ * Adapted for Rockbox by Daniel Ankers
+ *
+ * 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"
+
+/*
+ * Endian independent macros for shifting bytes within registers.
+ */
+#ifndef __ARMEB__
+#define pull            lsr
+#define push            lsl
+#else
+#define pull            lsl
+#define push            lsr
+#endif
+
+        .text
+
+/*
+ * Prototype: void *memmove(void *dest, const void *src, size_t n);
+ *
+ * Note:
+ *
+ * If the memory regions don't overlap, we simply branch to memcpy which is
+ * normally a bit faster. Otherwise the copy is done going downwards.
+ */
+
+    .section    .icode,"ax",%progbits
+
+    .align      2
+    .global     memmove
+    .type       memmove,%function
+
+memmove:
+
+        subs    ip, r0, r1
+        cmphi   r2, ip
+        bls memcpy
+
+        stmfd   sp!, {r0, r4, lr}
+        add r1, r1, r2
+        add r0, r0, r2
+        subs    r2, r2, #4
+        blt 8f
+        ands    ip, r0, #3
+        bne 9f
+        ands    ip, r1, #3
+        bne 10f
+
+1:      subs    r2, r2, #(28)
+        stmfd   sp!, {r5 - r8}
+        blt 5f
+
+2:
+3:
+4:      ldmdb   r1!, {r3, r4, r5, r6, r7, r8, ip, lr}
+        subs    r2, r2, #32
+        stmdb   r0!, {r3, r4, r5, r6, r7, r8, ip, lr}
+        bge 3b
+
+5:      ands    ip, r2, #28
+        rsb ip, ip, #32
+        addne   pc, pc, ip      @ C is always clear here
+        b   7f
+6:      nop
+        ldr r3, [r1, #-4]!
+        ldr r4, [r1, #-4]!
+        ldr r5, [r1, #-4]!
+        ldr r6, [r1, #-4]!
+        ldr r7, [r1, #-4]!
+        ldr r8, [r1, #-4]!
+        ldr lr, [r1, #-4]!
+
+        add pc, pc, ip
+        nop
+        nop
+        str r3, [r0, #-4]!
+        str r4, [r0, #-4]!
+        str r5, [r0, #-4]!
+        str r6, [r0, #-4]!
+        str r7, [r0, #-4]!
+        str r8, [r0, #-4]!
+        str lr, [r0, #-4]!
+
+7:      ldmfd   sp!, {r5 - r8}
+
+8:      movs    r2, r2, lsl #31
+        ldrneb  r3, [r1, #-1]!
+        ldrcsb  r4, [r1, #-1]!
+        ldrcsb  ip, [r1, #-1]
+        strneb  r3, [r0, #-1]!
+        strcsb  r4, [r0, #-1]!
+        strcsb  ip, [r0, #-1]
+        ldmpc   regs="r0, r4"
+
+9:      cmp ip, #2
+        ldrgtb  r3, [r1, #-1]!
+        ldrgeb  r4, [r1, #-1]!
+        ldrb    lr, [r1, #-1]!
+        strgtb  r3, [r0, #-1]!
+        strgeb  r4, [r0, #-1]!
+        subs    r2, r2, ip
+        strb    lr, [r0, #-1]!
+        blt 8b
+        ands    ip, r1, #3
+        beq 1b
+
+10:     bic r1, r1, #3
+        cmp ip, #2
+        ldr r3, [r1, #0]
+        beq 17f
+        blt 18f
+
+
+        .macro  backward_copy_shift push pull
+
+        subs    r2, r2, #28
+        blt 14f
+
+11:     stmfd   sp!, {r5 - r9}
+
+12:
+13:     ldmdb   r1!, {r7, r8, r9, ip}
+        mov     lr, r3, push #\push
+        subs    r2, r2, #32
+        ldmdb   r1!, {r3, r4, r5, r6}
+        orr     lr, lr, ip, pull #\pull
+        mov     ip, ip, push #\push
+        orr     ip, ip, r9, pull #\pull
+        mov     r9, r9, push #\push
+        orr     r9, r9, r8, pull #\pull
+        mov     r8, r8, push #\push
+        orr     r8, r8, r7, pull #\pull
+        mov     r7, r7, push #\push
+        orr     r7, r7, r6, pull #\pull
+        mov     r6, r6, push #\push
+        orr     r6, r6, r5, pull #\pull
+        mov     r5, r5, push #\push
+        orr     r5, r5, r4, pull #\pull
+        mov     r4, r4, push #\push
+        orr     r4, r4, r3, pull #\pull
+        stmdb   r0!, {r4 - r9, ip, lr}
+        bge 12b
+
+        ldmfd   sp!, {r5 - r9}
+
+14:     ands    ip, r2, #28
+        beq 16f
+
+15:     mov     lr, r3, push #\push
+        ldr r3, [r1, #-4]!
+        subs    ip, ip, #4
+        orr lr, lr, r3, pull #\pull
+        str lr, [r0, #-4]!
+        bgt 15b
+
+16:     add r1, r1, #(\pull / 8)
+        b   8b
+
+        .endm
+
+
+        backward_copy_shift push=8  pull=24
+
+17:     backward_copy_shift push=16 pull=16
+
+18:     backward_copy_shift push=24 pull=8
+
+