+++ /dev/null
-// ints-on.S - Interrupt related assembler code - _xtos_ints_on
-
-// 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_on( u32 mask );
-// Enables a set of interrupts.
-// With INTENABLE virtualizing, does not simply set INTENABLE directly, but rather
-// computes it as a function of the current virtual priority.
-//
-// 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_on
- .type _xtos_ints_on,@function
-_xtos_ints_on:
- 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 // 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 // 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_on, . - _xtos_ints_on
-