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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/asmmacro.h>
.seg "text"
/* Number of register windows */
.global _nwindows_min1, _nwindows
! Window overflow trap handler on save.
! Touches %g1
/* ------- */
.weak _window_overflow
.set _window_overflow,__window_overflow
.weak _window_overflow_svt
.set _window_overflow_svt,__window_overflow_svt
/* ------- */
!.global _window_overflow,_window_overflow_svt
.global __window_overflow_rettseq,__window_overflow_rettseq_ret,__window_overflow_slow1
__window_overflow_svt:
__window_overflow:
#ifndef _FLAT
__window_overflow_rettseq:
mov %wim, %l3 ! Calculate next WIM
mov %g1, %l7
srl %l3, 1, %g1
__window_overflow_rettseq_ret:
sethi %hi(_nwindows_min1), %l4 ! NWINDOWS-1
ld [%l4+%lo(_nwindows_min1)], %l4
sll %l3, %l4 , %l4
or %l4, %g1, %g1
save ! Get into window to be saved.
mov %g1, %wim
nop; nop; nop
std %l0, [%sp + 0];
std %l2, [%sp + 8];
std %l4, [%sp + 16];
std %l6, [%sp + 24];
std %i0, [%sp + 32];
std %i2, [%sp + 40];
std %i4, [%sp + 48];
std %i6, [%sp + 56];
restore ! Go back to trap window.
mov %l7, %g1
jmp %l1 ! Re-execute save.
rett %l2
nop
__window_overflow_slow1: ! space for possible stackcheck patch
nop
nop
#else
ta 0 ! halt
__window_overflow_rettseq:
__window_overflow_rettseq_ret:
__window_overflow_slow1:
nop
nop
nop
#endif
/* Window underflow trap handler on restore. */
! Touches %g1
/* ------- */
.weak _window_underflow
.set _window_underflow,__window_underflow
.weak _window_underflow_svt
.set _window_underflow_svt,__window_underflow_svt
/* ------- */
!.global _window_underflow,_window_underflow_svt
__window_underflow_svt:
__window_underflow:
#ifndef _FLAT
mov %wim, %l3 ! Calculate next WIM
sll %l3, 1, %l4
sethi %hi(_nwindows_min1), %l5 ! NWINDOWS-1
ld [%l5+%lo(_nwindows_min1)], %l5
srl %l3, %l5, %l5
or %l5, %l4, %l5
mov %l5, %wim
nop; nop; nop
restore ! Two restores to get into the
restore ! window to restore
ldd [%sp + 0], %l0; ! Restore window from the stack
ldd [%sp + 8], %l2;
ldd [%sp + 16], %l4;
ldd [%sp + 24], %l6;
ldd [%sp + 32], %i0;
ldd [%sp + 40], %i2;
ldd [%sp + 48], %i4;
ldd [%sp + 56], %i6;
save ! Get back to the trap window.
save
jmp %l1 ! Re-execute restore.
rett %l2
#else
ta 0 ! halt
#endif
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