move sboot to the root directory

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

diff --git a/sboot/magpie_1_1/sboot/athos/src/xtos/ints-off.S b/sboot/magpie_1_1/sboot/athos/src/xtos/ints-off.S
new file mode 100755 (executable)
index 0000000..01cc32d
--- /dev/null
+++ b/sboot/magpie_1_1/sboot/athos/src/xtos/ints-off.S
@@ -0,0 +1,74 @@
+// ints-off.S - Interrupt related assembler code - _xtos_ints_off
+
+// Copyright (c) 2004-2010 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/specreg.h>
+#include "xtos-internal.h"
+
+
+/***************************************************************************
+ *  _xtos_ints_on() and _xtos_ints_off() are used
+ *  to enable and disable interrupts from C code;
+ *  they can be called from the application or from a C interrupt handler.
+ */
+
+// u32  _xtos_ints_off( u32 mask );    [T1050.0 docs this as returning old INTENABLE value]
+//     Disables a set of interrupts.  See _xtos_ints_on().
+//
+//     MUST NOT be called when PS.INTLEVEL > XTOS_LOCKLEVEL
+//     (otherwise PS.INTLEVEL gets lowered; and operation may be inconsistent
+//      if this is called in the handler of an interrupt of level > LOCKLEVEL).
+//
+       .text
+       .align 4
+       .global _xtos_ints_off
+       .type _xtos_ints_off,@function
+_xtos_ints_off:
+       abi_entry
+#if XCHAL_HAVE_INTERRUPTS
+# if XTOS_VIRTUAL_INTENABLE
+       movi    a4, _xtos_intstruct
+       xtos_lock       a7      // MUST USE highest address register of function to avoid window overflows in critical section
+       l32i    a3, a4, XTOS_ENABLED_OFS        // a3 = xtos_enabled
+       l32i    a6, a4, XTOS_VPRI_ENABLED_OFS   // a6 = xtos_vpri_enabled
+       or      a5, a3, a2                      // a5 = xtos_enabled | mask
+       xor     a5, a5, a2                      // a5 = xtos_enabled & ~mask
+       s32i    a5, a4, XTOS_ENABLED_OFS        // xtos_enabled &= ~mask
+       and     a5, a5, a6                      // a5 = xtos_enabled & xtos_vpri_enabled
+# else
+       xtos_lock       a7      // MUST USE highest address register of function to avoid window overflows in critical section
+       rsr     a3, INTENABLE
+       //interlock
+       or      a5, a3, a2                      // a5 = INTENABLE | mask
+       xor     a5, a5, a2                      // a5 = INTENABLE & ~mask
+# endif
+       wsr     a5, INTENABLE
+       xtos_unlock     a7
+       mov     a2, a3                          // return previous (virtual or real) INTENABLE value
+#else /*XCHAL_HAVE_INTERRUPTS*/
+       movi    a2, 0           // this config does not have interrupts, so return 0
+#endif /*XCHAL_HAVE_INTERRUPTS*/
+       abi_return
+
+       .size   _xtos_ints_off, . - _xtos_ints_off
+