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/* $Id: entry.S,v 1.6 1999/11/23 17:12:49 ralf Exp $
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Low level exception handling
*
* Copyright (C) 1994 - 1999 by Ralf Baechle
* Copyright (C) 1999 Silicon Graphics
*/
#include <asm/asm.h>
#include <asm/regdef.h>
#include <asm/mipsregs.h>
#include <asm/stackframe.h>
/*
* Heia ... The %lo, %hi and %HI stuff is too strong for the ELF assembler
* and the ABI to cope with ...
*/
.text
.set noreorder
.align 4
FEXPORT(ret_from_fork)
jal schedule_tail
move a0, v0 # prev
j ret_from_sys_call
nop
FEXPORT(handle_bottom_half)
jal do_bottom_half
nop
b 9f
nop
reschedule: jal schedule
nop
FEXPORT(ret_from_sys_call)
FEXPORT(ret_from_irq)
ld t0, bh_mask
ld t1, bh_active # unused delay slot
and t0, t1
bnez t0, handle_bottom_half
9: ld t0, PT_STATUS(sp) # returning to kernel mode?
andi t1, t0, 0x10
beqz t1, return # -> yes
ld t1, TASK_NEED_RESCHED($28)
bnez t1, reschedule
lw v0, TASK_SIGPENDING($28)
move a0, zero
beqz v0, return
nop
jal do_signal
move a1, sp
FEXPORT(return) .set noat
RESTORE_ALL
eret
.set at
/*
* Common spurious interrupt handler.
*/
.text
.align 5
LEAF(spurious_interrupt)
/*
* Someone tried to fool us by sending an interrupt but we
* couldn't find a cause for it.
*/
lui t1,%hi(spurious_count)
lw t0,%lo(spurious_count)(t1)
addiu t0,1
j ret_from_irq
sw t0,%lo(spurious_count)(t1)
END(spurious_interrupt)
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