diff options
| author | David Howells <dhowells@redhat.com> | 2008-02-08 13:19:31 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-08 18:22:30 +0100 |
| commit | b920de1b77b72ca9432ac3f97edb26541e65e5dd (patch) | |
| tree | 40fa9be1470e929c47927dea7eddf184c0204229 /arch/mn10300/kernel/profile-low.S | |
| parent | mn10300: allocate serial port UART IDs for on-chip serial ports (diff) | |
| download | linux-b920de1b77b72ca9432ac3f97edb26541e65e5dd.tar.xz linux-b920de1b77b72ca9432ac3f97edb26541e65e5dd.zip | |
mn10300: add the MN10300/AM33 architecture to the kernel
Add architecture support for the MN10300/AM33 CPUs produced by MEI to the
kernel.
This patch also adds board support for the ASB2303 with the ASB2308 daughter
board, and the ASB2305. The only processor supported is the MN103E010, which
is an AM33v2 core plus on-chip devices.
[akpm@linux-foundation.org: nuke cvs control strings]
Signed-off-by: Masakazu Urade <urade.masakazu@jp.panasonic.com>
Signed-off-by: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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 000000000000..94ffac12d02d --- /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 |