+++ /dev/null
-// intlevel-set.S - Interrupt related assembler code - _xtos_set_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"
-
-
-/***************************************************************************
- * unsigned _xtos_set_intlevel(int intlevel);
- *
- * _xtos_set_intlevel() is used to set the current priority from C code;
- * it can be called from the application or from a C interrupt handler.
- *
- * NOTE: This version allows the 'intlevel' parameter to be computed
- * at run-time, and thus is longer. It is much more efficient, and
- * highly recommented, to use the XTOS_SET_INTLEVEL(intlevel) macro instead
- * (which requires a constant intlevel).
- */
-
- .text
- .align 4
- .global _xtos_set_intlevel
- .type _xtos_set_intlevel,@function
-_xtos_set_intlevel:
- abi_entry
-#if XCHAL_HAVE_INTERRUPTS
-# if XCHAL_HAVE_XEA2
- /* In XEA2, we can simply safely set PS.INTLEVEL directly: */
- rsr a3, PS // get old (current) PS.INTLEVEL
- movi a4, ~0xF
- extui a2, a2, 0, 4 // keep only INTLEVEL bits of parameter
- and a4, a4, a3 // mask out PS.INTLEVEL
- or a4, a4, a2 // insert requested INTLEVEL
- wsr a4, PS // update PS.INTLEVEL
- extui a2, a3, 0, 4 // return only old PS.INTLEVEL field
- rsync // wait for WSR to PS to complete
-# else
- /* In XEA1, we have to rely on INTENABLE register virtualization: */
- movi a4, Xthal_intlevel_andbelow_mask
- extui a3, a2, 0, 4 // keep only INTLEVEL bits of parameter
- addx4 a5, a3, a4 // index mask to use
- l32i a3, a5, 0 // get mask of interrupts at requested intlevel and below
- movi a5, -1 // all 1's
- movi a4, _xtos_intstruct
- xor a3, a3, a5 // mask of interrupts at intlevels above the requested one (to enable)
- 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 // a5 = 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
-#endif /*XCHAL_HAVE_INTERRUPTS*/
- abi_return
-
- .size _xtos_set_intlevel, . - _xtos_set_intlevel
-
projects / open-ath9k-htc-firmware.git / blobdiff