lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

mn10300: add the MN10300/AM33 architecture to the kernel

Browse Source 
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>
This commit is contained in:
David Howells
2008-02-08 04:19:31 -08:00
committed by Linus Torvalds
parent ef3d534754
commit b920de1b77
234 changed files with 27906 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

71
arch/mn10300/kernel/switch_to.S Normal file
View File

@ -0,0 +1,71 @@
###############################################################################
#
# MN10300 Context switch operation
#
# 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/thread_info.h>
#include <asm/cpu-regs.h>
.text
###############################################################################
#
# struct task_struct *__switch_to(struct thread_struct *prev,
# struct thread_struct *next,
# struct task_struct *prev_task)
#
###############################################################################
ENTRY(__switch_to)
movm [d2,d3,a2,a3,exreg1],(sp)
or EPSW_NMID,epsw
mov (44,sp),d2
mov d0,a0
mov d1,a1
# save prev context
mov (__frame),d0
mov d0,(THREAD_FRAME,a0)
mov __switch_back,d0
mov d0,(THREAD_PC,a0)
mov sp,a2
mov a2,(THREAD_SP,a0)
mov a3,(THREAD_A3,a0)
mov (THREAD_A3,a1),a3
mov (THREAD_SP,a1),a2
# switch
mov a2,sp
# load next context
GET_THREAD_INFO a2
mov a2,(__current_ti)
mov (TI_task,a2),a2
mov a2,(__current)
#ifdef CONFIG_MN10300_CURRENT_IN_E2
mov a2,e2
#endif
mov (THREAD_FRAME,a1),a2
mov a2,(__frame)
mov (THREAD_PC,a1),a2
mov d2,d0 # for ret_from_fork
mov d0,a0 # for __switch_to
jmp (a2)
__switch_back:
and ~EPSW_NMID,epsw
ret [d2,d3,a2,a3,exreg1],32