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/*
* Copyright (c) 2011 Aeroflex Gaisler
*
* BSD license:
*
* 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 <asm-leon/leon.h>
#include <asm-leon/leonstack.h>
#include <asm-leon/contextswitch.h>
#include <asm-leon/winmacros.h>
/* This asm code relies on the following offsets (setjmp.h):
#define THREAD_JB_SP 0
#define THREAD_JB_PC 1
#define THREAD_JB_PSR 8
#define THREAD_JB_WIM 9 */
/* Number of register windows */
.global _nwindows_min1, _nwindows
.text
.global _switch_to
_switch_to:
#ifndef _FLAT
!mov %o0,%i0 /* propagate env on restore */
!mov %o1,%i1 /* propagate val on restore */
!restore
mov %o0,%g7
mov %o1,%g3 /* former %%i1 (val) */
sethi %hi(_nwindows_min1), %g4 /* flush registers */
ld [%g4+%lo(_nwindows_min1)], %g4
1: save %sp, -SF_REGS_SZ, %sp !NWINDOWS-1 times
sub %g4,1,%g4
cmp %g0,%g4
bne 1b
nop
#else
mov %o0,%g7
mov %o1,%g3 /* former %%i1 (val) */
RW_STORE(sp)
#endif
ldd [%g7+THREAD_JB_PSR*4], %g4 /* load psr,wim */
wr %g4, 0x20, %psr
nop
nop
nop
ldd [%g7 +THREAD_JB_SP*4], %sp /* load sp, pc to jump to */
wr %g5, 0x0, %wim
RW_LOAD(sp) /* restore window */
wr %g4, 0x00, %psr
nop
nop
nop
jmp %o7 + 8 /* success */
mov %g3, %o0 /* return %%g3 */
.text
.global thread_setjmp, _do_thread_setjmp
thread_setjmp:
#ifdef _FLAT
RW_STORE(sp) /* store window */
#endif
! RW_STORE(sp) /* store window for _FLAT and normal, SWITCH_TO_STACK in pthread need this*/
mov %psr,%o2
#ifndef _SOFT_FLOAT
set 0x1000,%o3
andn %o2,%o3,%o2 !disable fpu
#endif
std %sp,[%o0] !THREAD_JB_SP
st %o2,[%o0+(8*4)] !THREAD_JB_PSR
ba _do_thread_setjmp
nop
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