129 lines
3.4 KiB
ArmAsm
129 lines
3.4 KiB
ArmAsm
/*
|
|
* 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
|
|
|
|
#define FASTIRQ_ENABLE
|
|
/*#define FASTIRQ_DYNAMIC*/ /* depend on FASTIRQ_ENABLE */
|
|
|
|
__leonbare_irq_entry_svt: /* irq from svt trap dispatcher */
|
|
sub %l6,0x10, %l7
|
|
rd %wim, %l3
|
|
|
|
_leonbare_irq_entry:
|
|
|
|
SAVE_ALL_FAST(.L3) ! fast irq processing, volatile %g6, use frame
|
|
|
|
.L3:
|
|
#ifdef __threadx__
|
|
set _tx_thread_system_state, %o0
|
|
ld [%o0],%o1
|
|
add %o1,1,%o1
|
|
st %o1,[%o0]
|
|
#endif
|
|
|
|
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 %o0, %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]
|
|
|
|
#ifdef __threadx__
|
|
set _tx_thread_system_state, %o0
|
|
ld [%o0],%o1
|
|
sub %o1,1,%o1
|
|
st %o1,[%o0]
|
|
#endif
|
|
|
|
RESTORE_ALL_FAST
|
|
|
|
.seg "data"
|
|
.global nestedirq
|
|
.align 4
|
|
nestedirq:
|
|
.long 0
|
|
.global fastirq
|
|
.align 4
|
|
fastirq:
|
|
.long 0
|
|
.global nestcount
|
|
.align 4
|
|
nestcount:
|
|
.long 0
|