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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/leonstack.h>
#include <asm-leon/asmmacro.h>
#include <asm-leon/winmacros.h>
#include <asm-leon/leon.h>
/* l0: psr
l1: pc
l2: npc
l3: wim
l7: irqnr */
.seg "text"
/* ------- */
.weak _leonbare_irq_entry_svt
.set _leonbare_irq_entry_svt,__leonbare_irq_entry_svt
.weak leonbare_irq_entry
.set leonbare_irq_entry,_leonbare_irq_entry
/* ------- */
!.global leonbare_irq_entry,_leonbare_irq_entry_svt
.global _irqtbl, _irqtrap, handler_irq, fpustate_current
__leonbare_irq_entry_svt: /* irq from svt trap dispatcher */
sub %l6,0x10, %l7
rd %wim, %l3
_leonbare_irq_entry:
set SPARC_PSR_EF_MASK,%l6
andn %l0, %l6, %l0 ! fpu off
SAVE_ALL
set nestcount,%o0
ld [%o0],%o1
add %o1,1,%o1
st %o1,[%o0]
#ifdef CONFIG_LEONBARE_NONESTEDIRQ
or %l0, SPARC_PSR_PIL_MASK, %o0 ! no nested irqs
wr %o0, SPARC_PSR_ET_MASK, %psr
WRITE_PAUSE
#else
sll %l7,SPARC_PSR_PIL_SHIFT,%o1
andn %l0,SPARC_PSR_PIL_MASK,%o0
or %l0, %o1, %o1
set nestedirq,%o0
ld [%o0],%o0
cmp %g0,%o0 ! no nested irqs?
beq,a .L1
or %o1, SPARC_PSR_PIL_MASK, %o1
.L1:
wr %o1, SPARC_PSR_ET_MASK, %psr
WRITE_PAUSE
#endif
mov %l7, %o0 ! irq level
call handler_irq ! void handler_irq (int irq, struct leonbare_pt_regs *pt_regs)
#ifndef _SOFT_FLOAT
add %sp, FW_REGS_SZ + 8 + SF_REGS_SZ , %o1 ! pt_regs ptr
#else
add %sp, SF_REGS_SZ , %o1 ! pt_regs ptr
#endif
or %l0, SPARC_PSR_PIL_MASK, %o1
wr %o1, SPARC_PSR_ET_MASK, %psr ! enable nesting again, keep ET up
WRITE_PAUSE
set nestcount,%o0
ld [%o0],%o1
sub %o1,1,%o1
st %o1,[%o0]
RESTORE_ALL
.seg "data"
.global nestedirq
.align 4
nestedirq:
.long 0
.global nestcount
.align 4
nestcount:
.long 0
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