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kernel add
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/* MN10300 CPU core caching macros -*- asm -*-
*
* 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.
*/
###############################################################################
#
# Invalidate the instruction cache.
# A0: Should hold CHCTR
# D0: Should have been read from CHCTR
# D1: Will be clobbered
#
# On some cores it is necessary to disable the icache whilst we do this.
#
###############################################################################
.macro invalidate_icache,disable_irq
#if defined(CONFIG_AM33_2) || defined(CONFIG_AM33_3)
.if \disable_irq
# don't want an interrupt routine seeing a disabled cache
mov epsw,d1
and ~EPSW_IE,epsw
or EPSW_NMID,epsw
nop
nop
.endif
# disable the icache
and ~CHCTR_ICEN,d0
movhu d0,(a0)
# and wait for it to calm down
setlb
movhu (a0),d0
btst CHCTR_ICBUSY,d0
lne
# invalidate
or CHCTR_ICINV,d0
movhu d0,(a0)
# wait for the cache to finish
setlb
movhu (a0),d0
btst CHCTR_ICBUSY,d0
lne
# and reenable it
or CHCTR_ICEN,d0
movhu d0,(a0)
movhu (a0),d0
.if \disable_irq
LOCAL_IRQ_RESTORE(d1)
.endif
#else /* CONFIG_AM33_2 || CONFIG_AM33_3 */
# invalidate
or CHCTR_ICINV,d0
movhu d0,(a0)
movhu (a0),d0
#endif /* CONFIG_AM33_2 || CONFIG_AM33_3 */
.endm
###############################################################################
#
# Invalidate the data cache.
# A0: Should hold CHCTR
# D0: Should have been read from CHCTR
# D1: Will be clobbered
#
# On some cores it is necessary to disable the dcache whilst we do this.
#
###############################################################################
.macro invalidate_dcache,disable_irq
#if defined(CONFIG_AM33_2) || defined(CONFIG_AM33_3)
.if \disable_irq
# don't want an interrupt routine seeing a disabled cache
mov epsw,d1
and ~EPSW_IE,epsw
or EPSW_NMID,epsw
nop
nop
.endif
# disable the dcache
and ~CHCTR_DCEN,d0
movhu d0,(a0)
# and wait for it to calm down
setlb
movhu (a0),d0
btst CHCTR_DCBUSY,d0
lne
# invalidate
or CHCTR_DCINV,d0
movhu d0,(a0)
# wait for the cache to finish
setlb
movhu (a0),d0
btst CHCTR_DCBUSY,d0
lne
# and reenable it
or CHCTR_DCEN,d0
movhu d0,(a0)
movhu (a0),d0
.if \disable_irq
LOCAL_IRQ_RESTORE(d1)
.endif
#else /* CONFIG_AM33_2 || CONFIG_AM33_3 */
# invalidate
or CHCTR_DCINV,d0
movhu d0,(a0)
movhu (a0),d0
#endif /* CONFIG_AM33_2 || CONFIG_AM33_3 */
.endm
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