mirror of https://gitee.com/openkylin/linux.git
70 lines
1.7 KiB
ArmAsm
70 lines
1.7 KiB
ArmAsm
/* MN10300 CPU cache invalidation routines, using automatic purge registers
|
|
*
|
|
* Copyright (C) 2011 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/cache.h>
|
|
#include <asm/irqflags.h>
|
|
#include <asm/cacheflush.h>
|
|
#include "cache.inc"
|
|
|
|
.am33_2
|
|
|
|
.globl debugger_local_cache_flushinv_one
|
|
|
|
###############################################################################
|
|
#
|
|
# void debugger_local_cache_flushinv_one(u8 *addr)
|
|
#
|
|
# Invalidate one particular cacheline if it's in the icache
|
|
#
|
|
###############################################################################
|
|
ALIGN
|
|
.globl debugger_local_cache_flushinv_one
|
|
.type debugger_local_cache_flushinv_one,@function
|
|
debugger_local_cache_flushinv_one:
|
|
mov d0,a1
|
|
|
|
mov CHCTR,a0
|
|
movhu (a0),d0
|
|
btst CHCTR_ICEN,d0
|
|
beq mn10300_local_icache_inv_range_reg_end
|
|
|
|
LOCAL_CLI_SAVE(d1)
|
|
|
|
mov ICIVCR,a0
|
|
|
|
# wait for the invalidator to quiesce
|
|
setlb
|
|
mov (a0),d0
|
|
btst ICIVCR_ICIVBSY,d0
|
|
lne
|
|
|
|
# set the mask
|
|
mov ~L1_CACHE_TAG_MASK,d0
|
|
mov d0,(ICIVMR)
|
|
|
|
# invalidate the cache line at the given address
|
|
and ~L1_CACHE_TAG_MASK,a1
|
|
or ICIVCR_ICI,a1
|
|
mov a1,(a0)
|
|
|
|
# wait for the invalidator to quiesce again
|
|
setlb
|
|
mov (a0),d0
|
|
btst ICIVCR_ICIVBSY,d0
|
|
lne
|
|
|
|
LOCAL_IRQ_RESTORE(d1)
|
|
|
|
mn10300_local_icache_inv_range_reg_end:
|
|
ret [],0
|
|
.size debugger_local_cache_flushinv_one,.-debugger_local_cache_flushinv_one
|