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133 lines
2.6 KiB
133 lines
2.6 KiB
/* MN10300 CPU core caching macros -*- asm -*-
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*
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* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public Licence
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* as published by the Free Software Foundation; either version
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* 2 of the Licence, or (at your option) any later version.
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*/
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###############################################################################
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#
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# Invalidate the instruction cache.
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# A0: Should hold CHCTR
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# D0: Should have been read from CHCTR
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# D1: Will be clobbered
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#
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# On some cores it is necessary to disable the icache whilst we do this.
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#
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###############################################################################
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.macro invalidate_icache,disable_irq
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#if defined(CONFIG_AM33_2) || defined(CONFIG_AM33_3)
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.if \disable_irq
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# don't want an interrupt routine seeing a disabled cache
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mov epsw,d1
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and ~EPSW_IE,epsw
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or EPSW_NMID,epsw
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nop
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nop
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.endif
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# disable the icache
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and ~CHCTR_ICEN,d0
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movhu d0,(a0)
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# and wait for it to calm down
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setlb
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movhu (a0),d0
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btst CHCTR_ICBUSY,d0
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lne
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# invalidate
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or CHCTR_ICINV,d0
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movhu d0,(a0)
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# wait for the cache to finish
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setlb
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movhu (a0),d0
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btst CHCTR_ICBUSY,d0
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lne
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# and reenable it
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or CHCTR_ICEN,d0
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movhu d0,(a0)
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movhu (a0),d0
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.if \disable_irq
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LOCAL_IRQ_RESTORE(d1)
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.endif
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#else /* CONFIG_AM33_2 || CONFIG_AM33_3 */
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# invalidate
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or CHCTR_ICINV,d0
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movhu d0,(a0)
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movhu (a0),d0
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#endif /* CONFIG_AM33_2 || CONFIG_AM33_3 */
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.endm
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###############################################################################
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#
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# Invalidate the data cache.
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# A0: Should hold CHCTR
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# D0: Should have been read from CHCTR
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# D1: Will be clobbered
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#
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# On some cores it is necessary to disable the dcache whilst we do this.
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#
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###############################################################################
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.macro invalidate_dcache,disable_irq
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#if defined(CONFIG_AM33_2) || defined(CONFIG_AM33_3)
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.if \disable_irq
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# don't want an interrupt routine seeing a disabled cache
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mov epsw,d1
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and ~EPSW_IE,epsw
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or EPSW_NMID,epsw
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nop
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nop
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.endif
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# disable the dcache
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and ~CHCTR_DCEN,d0
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movhu d0,(a0)
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# and wait for it to calm down
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setlb
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movhu (a0),d0
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btst CHCTR_DCBUSY,d0
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lne
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# invalidate
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or CHCTR_DCINV,d0
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movhu d0,(a0)
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# wait for the cache to finish
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setlb
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movhu (a0),d0
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btst CHCTR_DCBUSY,d0
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lne
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# and reenable it
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or CHCTR_DCEN,d0
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movhu d0,(a0)
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movhu (a0),d0
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.if \disable_irq
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LOCAL_IRQ_RESTORE(d1)
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.endif
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#else /* CONFIG_AM33_2 || CONFIG_AM33_3 */
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# invalidate
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or CHCTR_DCINV,d0
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movhu d0,(a0)
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movhu (a0),d0
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#endif /* CONFIG_AM33_2 || CONFIG_AM33_3 */
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.endm
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