move sboot to the root directory

[open-ath9k-htc-firmware.git] / sboot / magpie_1_1 / sboot / athos / src / xtos / exit.S

diff --git a/sboot/magpie_1_1/sboot/athos/src/xtos/exit.S b/sboot/magpie_1_1/sboot/athos/src/xtos/exit.S
new file mode 100755 (executable)
index 0000000..2793edf
--- /dev/null
+++ b/sboot/magpie_1_1/sboot/athos/src/xtos/exit.S
@@ -0,0 +1,72 @@
+// exit.S
+//
+// For hardware / boards, this is the default _exit routine called by the
+// C library exit() function.  If the program ever exits, we eventually
+// end up here after all C library cleanup (such as closing open files,
+// calling exit callbacks and C++ destructors, etc) is complete.
+
+// Copyright (c) 1998-2010 Tensilica Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+#include <xtensa/coreasm.h>
+#include <xtensa/config/core-isa.h>
+#include "xtos-internal.h"
+
+// Macros to abstract away ABI differences
+#if __XTENSA_CALL0_ABI__
+# define CALL  call0
+#else
+# define CALL  call4
+#endif
+
+
+       .text
+       .align 4
+       .global _exit
+       .type   _exit, @function
+_exit:
+       abi_entry 0, 4
+
+       // sync dirty data to memory before terminating
+#if XCHAL_DCACHE_IS_COHERENT
+       CALL    xthal_cache_coherence_optout
+#elif XCHAL_DCACHE_IS_WRITEBACK
+       CALL    xthal_dcache_all_writeback
+#endif
+
+       // sync queues (if any, only for LX and later):
+#if XCHAL_HW_MIN_VERSION >= XTENSA_HWVERSION_RA_2004_1 /* LX or later? */
+       extw
+#endif
+       // can break to debug monitor, go to sleep with waiti, or just spin in a loop
+.L0:
+#if XCHAL_HAVE_DEBUG
+       break   0, 0            // back to debugger, if one is attached
+#elif XCHAL_HAVE_INTERRUPTS
+       waiti   15
+#elif XCHAL_HAVE_HALT
+       halt
+#endif
+       j       .L0
+       //abi_exit
+
+       .size   _exit, . - _exit
+