102 lines
4.3 KiB
ArmAsm
102 lines
4.3 KiB
ArmAsm
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/*
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* Copyright (c) 2011 Aeroflex Gaisler
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*
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* BSD license:
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <asm-leon/leon.h>
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#include <asm-leon/leonstack.h>
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#include <asm-leon/contextswitch.h>
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#include <asm-leon/winmacros.h>
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/* This asm code relies on the following offsets (setjmp.h):
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#define THREAD_JB_SP 0
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#define THREAD_JB_PC 1
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#define THREAD_JB_PSR 8
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#define THREAD_JB_WIM 9 */
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/* Number of register windows */
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.global _nwindows_min1, _nwindows
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.text
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.global _switch_to
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_switch_to:
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#ifndef _FLAT
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!mov %o0,%i0 /* propagate env on restore */
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!mov %o1,%i1 /* propagate val on restore */
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!restore
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mov %o0,%g7
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mov %o1,%g3 /* former %%i1 (val) */
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sethi %hi(_nwindows_min1), %g4 /* flush registers */
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ld [%g4+%lo(_nwindows_min1)], %g4
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1: save %sp, -SF_REGS_SZ, %sp !NWINDOWS-1 times
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sub %g4,1,%g4
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cmp %g0,%g4
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bne 1b
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nop
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#else
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mov %o0,%g7
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mov %o1,%g3 /* former %%i1 (val) */
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RW_STORE(sp)
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#endif
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ldd [%g7+THREAD_JB_PSR*4], %g4 /* load psr,wim */
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wr %g4, 0x20, %psr
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nop
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nop
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nop
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ldd [%g7 +THREAD_JB_SP*4], %sp /* load sp, pc to jump to */
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wr %g5, 0x0, %wim
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RW_LOAD(sp) /* restore window */
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wr %g4, 0x00, %psr
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nop
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nop
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nop
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jmp %o7 + 8 /* success */
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mov %g3, %o0 /* return %%g3 */
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.text
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.global thread_setjmp, _do_thread_setjmp
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thread_setjmp:
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#ifdef _FLAT
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RW_STORE(sp) /* store window */
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#endif
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! RW_STORE(sp) /* store window for _FLAT and normal, SWITCH_TO_STACK in pthread need this*/
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mov %psr,%o2
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#ifndef _SOFT_FLOAT
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set 0x1000,%o3
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andn %o2,%o3,%o2 !disable fpu
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#endif
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std %sp,[%o0] !THREAD_JB_SP
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st %o2,[%o0+(8*4)] !THREAD_JB_PSR
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ba _do_thread_setjmp
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nop
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