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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/asmmacro.h>
#include <asm-leon/leonstack.h>
#include <asm-leon/winmacros.h>
#include <asm-leon/leon.h>
#ifndef _SOFT_FLOAT
.seg "text"
/* ------- */
.weak _fpdis_enable_svt
.set _fpdis_enable_svt,__fpdis_enable_svt
.weak _fpdis_enable
.set _fpdis_enable,__fpdis_enable
/* ------- */
!.global _fpdis_enable,_fpdis_enable_svt
__fpdis_enable_svt:
__fpdis_enable:
set SPARC_PSR_EF_MASK,%l3
or %l0,%l3,%l0
or %l0,0xf00, %l3 ! PIL up to 15, enable fpu
wr %l3,0, %psr ! restore the condition flags, enable fpu
nop
nop
nop
mov %psr, %l3 ! check if fpu is present
set SPARC_PSR_EF_MASK,%l4
andcc %l3, %l4, %l3
bne 4f
nop
ta 0 ! no fpu present, halt
4:
set fpustate_current,%l4
ld [%l4],%l4
set fpustate_owner,%l5
ld [%l5],%l5
cmp %l4,%l5
beq mpfnostore
nop
cmp %g0,%l5
beq mpfstore
nop
FW_STORE(%l5)
mpfstore:
set fpustate_owner,%l6
st %l4,[%l6]
cmp %g0,%l4
beq mpfnostore
nop
FW_LOAD(%l4)
mpfnostore:
wr %l0,0, %psr ! restore the condition flags, enable fpu
nop
nop
nop
jmpl %l1, %g0
rett %l2
.seg "data"
.global fpustate_default
.align 8
fpustate_default:
.long 0; .long 0; .long 0; .long 0; .long 0; .long 0; .long 0; .long 0;
.long 0; .long 0; .long 0; .long 0; .long 0; .long 0; .long 0; .long 0;
.long 0; .long 0; .long 0; .long 0; .long 0; .long 0; .long 0; .long 0;
.long 0; .long 0; .long 0; .long 0; .long 0; .long 0; .long 0; .long 0;
.long 0; .long 0; .long 0; .long 0; .long 0; .long 0; .long 0; .long 0;
.global fpustate_owner
fpustate_owner:
.word fpustate_default ! pointer to FPU owning context
.global fpustate_current
fpustate_current:
.word fpustate_default ! pointer to current threads FPU context
#endif
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