+++ /dev/null
-// intlevel-restore.S - Interrupt related assembler code - _xtos_restore_intlevel
-
-// 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"
-
-
-/***************************************************************************
- * void _xtos_restore_intlevel(unsigned restoreval);
- *
- * _xtos_restore_intlevel() restores the current interrupt level
- * according to a value returned by _xtos_set_intlevel() or
- * _xtos_set_min_intlevel() (or one of the corresponding macros).
- *
- * NOTE: In XEA2, this function may restore the entire PS register, not
- * just the PS.INTLEVEL field. If some other PS field(s) must be changed
- * and kept intact across restoring PS.INTLEVEL (this is generally unlikely),
- * use the XTOS_RESTORE_JUST_INTLEVEL() macro instead (which is slower).
- *
- * NOTE: In XEA1, this function is implemented further below, identically
- * to _xtos_set_vpri().
- *
- * NOTE: The macro form of this function (XTOS_RESTORE_INTLEVEL())
- * is recommended (for XEA2 configs or where the config is unknown)
- * because it may be more efficient.
- */
-
- .text
- .global _xtos_restore_intlevel
- .type _xtos_restore_intlevel,@function
-#if XCHAL_HAVE_XEA2
- .align 4
-_xtos_restore_intlevel:
- abi_entry
-# if XCHAL_HAVE_INTERRUPTS
- wsr a2, PS // restore PS
- rsync // wait for WSR to PS to complete
-# endif
- abi_return
- .size _xtos_restore_intlevel, . - _xtos_restore_intlevel
-#endif
-
-
-
-/***************************************************************************
- * _xtos_set_vpri() is used to set the current virtual priority from C code;
- * it can be called from the application or from a C interrupt handler.
- */
-
- .global _xtos_set_vpri
- .type _xtos_set_vpri,@function
- .align 4
-_xtos_set_vpri:
-#if XCHAL_HAVE_XEA1
-_xtos_restore_intlevel:
-#endif
- abi_entry
-#if XCHAL_HAVE_INTERRUPTS && XTOS_VIRTUAL_INTENABLE
- mov a3, a2
- movi a4, _xtos_intstruct
- xtos_lock a7 // MUST USE highest address register of function to avoid window overflows in critical section
- l32i a2, a4, XTOS_VPRI_ENABLED_OFS // return old xtos_vpri_enabled (current vpri)
- l32i a5, a4, XTOS_ENABLED_OFS // a3 = xtos_enabled
- s32i a3, a4, XTOS_VPRI_ENABLED_OFS // set new xtos_vpri_enabled (current vpri)
- and a5, a5, a3 // a5 = xtos_enabled & xtos_vpri_enabled
- wsr a5, INTENABLE
- xtos_unlock a7
-#endif /*XCHAL_HAVE_INTERRUPTS*/
- abi_return
- .size _xtos_set_vpri, . - _xtos_set_vpri
-
projects / open-ath9k-htc-firmware.git / blobdiff