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| author | Timothy Pearson <tpearson@raptorengineering.com> | 2017-08-23 14:45:25 -0500 |
|---|---|---|
| committer | Timothy Pearson <tpearson@raptorengineering.com> | 2017-08-23 14:45:25 -0500 |
| commit | fcbb27b0ec6dcbc5a5108cb8fb19eae64593d204 (patch) | |
| tree | 22962a4387943edc841c72a4e636a068c66d58fd /arch/mn10300/kernel/profile-low.S | |
| download | ast2050-linux-kernel-fcbb27b0ec6dcbc5a5108cb8fb19eae64593d204.zip ast2050-linux-kernel-fcbb27b0ec6dcbc5a5108cb8fb19eae64593d204.tar.gz | |
Initial import of modified Linux 2.6.28 tree
Original upstream URL:
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git | branch linux-2.6.28.y
Diffstat (limited to 'arch/mn10300/kernel/profile-low.S')
| -rw-r--r-- | arch/mn10300/kernel/profile-low.S | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/arch/mn10300/kernel/profile-low.S b/arch/mn10300/kernel/profile-low.S new file mode 100644 index 0000000..94ffac1 --- /dev/null +++ b/arch/mn10300/kernel/profile-low.S @@ -0,0 +1,72 @@ +############################################################################### +# +# 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 |
