72 lines
1.6 KiB
ArmAsm
72 lines
1.6 KiB
ArmAsm
###############################################################################
|
|
#
|
|
# Fast profiling interrupt handler
|
|
#
|
|
# Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
|
|
# Written by David Howells (dhowells@redhat.com)
|
|
#
|
|
# This program is free software; you can redistribute it and/or
|
|
# modify it under the terms of the GNU General Public Licence
|
|
# as published by the Free Software Foundation; either version
|
|
# 2 of the Licence, or (at your option) any later version.
|
|
#
|
|
###############################################################################
|
|
#include <linux/sys.h>
|
|
#include <linux/linkage.h>
|
|
#include <asm/segment.h>
|
|
#include <asm/smp.h>
|
|
#include <asm/intctl-regs.h>
|
|
#include <asm/timer-regs.h>
|
|
|
|
#define pi break
|
|
|
|
.balign 4
|
|
counter:
|
|
.long -1
|
|
|
|
###############################################################################
|
|
#
|
|
# Profiling interrupt entry point
|
|
# - intended to run at interrupt priority 1
|
|
#
|
|
###############################################################################
|
|
ENTRY(profile_handler)
|
|
movm [d2,d3,a2],(sp)
|
|
|
|
# ignore userspace
|
|
mov (12,sp),d2
|
|
and EPSW_nSL,d2
|
|
bne out
|
|
|
|
# do nothing if there's no buffer
|
|
mov (prof_buffer),a2
|
|
and a2,a2
|
|
beq out
|
|
or 0x20000000,a2
|
|
|
|
# calculate relative position in text segment
|
|
mov (16,sp),d2
|
|
sub _stext,d2
|
|
mov (prof_shift),d3
|
|
lsr d3,d2
|
|
mov (prof_len),d3
|
|
cmp d3,d2
|
|
bcc outside_text
|
|
|
|
# increment the appropriate profile bucket
|
|
do_inc:
|
|
asl2 d2
|
|
mov (a2,d2),d3
|
|
inc d3
|
|
mov d3,(a2,d2)
|
|
out:
|
|
mov GxICR_DETECT,d2
|
|
movbu d2,(TM11ICR) # ACK the interrupt
|
|
movbu (TM11ICR),d2
|
|
movm (sp),[d2,d3,a2]
|
|
rti
|
|
|
|
outside_text:
|
|
sub 1,d3
|
|
mov d3,d2
|
|
bra do_inc
|