Create fimrware/asm directory for assembly optimized stuff.

This dir is suitable for stuff that doesn't fit the target tree, e.g. because
it also builds on hosted or otherwise. It also has a generic subfolder for
fallback C implementations so that not all archs need to provide asm files.

SOURCES should only contain "foo.c" where foo.c includes the specific
<arch>/foo.c files from the subdirs using the preprocessor. This way automatic
selection of asm versions or generic C verion is possible.

For the start, the thread support files are moved, since ASM threads can
be used on hosted platforms as well. Since core_sleep() remains platform
specific it's moved to the corresponding system.h headers.

Change-Id: Iebff272f3407a6eaafeb7656ceb0ae9eca3f7cb9

1 files changed, 0 insertions, 99 deletions

diff --git a/firmware/target/hosted/thread-arm.c b/firmware/target/hosted/thread-arm.c
deleted file mode 100644
index 8815f063d7..0000000000
--- a/firmware/target/hosted/thread-arm.c
+++ /dev/null
@@ -1,99 +0,0 @@
-/***************************************************************************
- *             __________               __   ___.
- *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
- *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
- *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
- *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
- *                     \/            \/     \/    \/            \/
- * $Id$
- *
- * Copyright (C) 2005 by Thom Johansen
- * Copyright (C) 2010 by Thomas Martitz (Android-suitable core_sleep())
- *
- * Generic ARM threading support
- *
- * 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 <system.h>
-
-/*---------------------------------------------------------------------------
- * Start the thread running and terminate it if it returns
- *---------------------------------------------------------------------------
- */
-static void __attribute__((naked)) USED_ATTR start_thread(void)
-{
-    /* r0 = context */
-    asm volatile (
-        "ldr    sp, [r0, #32]            \n" /* Load initial sp */
-        "ldr    r4, [r0, #40]            \n" /* start in r4 since it's non-volatile */
-        "mov    r1, #0                   \n" /* Mark thread as running */
-        "str    r1, [r0, #40]            \n"
-        "mov    lr, pc                   \n" /* Call thread function */
-        "bx     r4                       \n"
-    ); /* No clobber list - new thread doesn't care */
-    thread_exit();
-}
-
-/* For startup, place context pointer in r4 slot, start_thread pointer in r5
- * slot, and thread function pointer in context.start. See load_context for
- * what happens when thread is initially going to run. */
-#define THREAD_STARTUP_INIT(core, thread, function) \
-    ({ (thread)->context.r[0] = (uint32_t)&(thread)->context,  \
-       (thread)->context.r[1] = (uint32_t)start_thread, \
-       (thread)->context.start = (uint32_t)function; })
-
-
-/*---------------------------------------------------------------------------
- * Store non-volatile context.
- *---------------------------------------------------------------------------
- */
-static inline void store_context(void* addr)
-{
-    asm volatile(
-        "stmia  %0, { r4-r11, sp, lr } \n"
-        : : "r" (addr)
-    );
-}
-
-/*---------------------------------------------------------------------------
- * Load non-volatile context.
- *---------------------------------------------------------------------------
- */
-static inline void load_context(const void* addr)
-{
-    asm volatile(
-        "ldr     r0, [%0, #40]          \n" /* Load start pointer */
-        "cmp     r0, #0                 \n" /* Check for NULL */
-
-        /* If not already running, jump to start */
-        "ldmneia %0, { r0, pc }         \n"
-        "ldmia   %0, { r4-r11, sp, lr } \n" /* Load regs r4 to r14 from context */
-        : : "r" (addr) : "r0" /* only! */
-    );
-}
-
-/*
- * this core sleep suspends the OS thread rockbox runs under, which greatly
- * reduces cpu usage (~100% to <10%)
- *
- * it returns when when the tick timer is called, other interrupt-like
- * events occur
- *
- * wait_for_interrupt is implemented in kernel-<platform>.c
- **/
-
-static inline void core_sleep(void)
-{
-    enable_irq();
-    wait_for_interrupt();
-}
-
-