215 lines
3.8 KiB
C
215 lines
3.8 KiB
C
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/*
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* include/asm-xtensa/cacheasm.h
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (C) 2006 Tensilica Inc.
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*/
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#include <asm/cache.h>
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#include <asm/asmmacro.h>
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#include <linux/stringify.h>
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/*
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* Define cache functions as macros here so that they can be used
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* by the kernel and boot loader. We should consider moving them to a
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* library that can be linked by both.
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*
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* Locking
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*
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* ___unlock_dcache_all
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* ___unlock_icache_all
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*
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* Flush and invaldating
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*
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* ___flush_invalidate_dcache_{all|range|page}
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* ___flush_dcache_{all|range|page}
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* ___invalidate_dcache_{all|range|page}
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* ___invalidate_icache_{all|range|page}
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*
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*/
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.macro __loop_cache_unroll ar at insn size line_width max_immed
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.if (1 << (\line_width)) > (\max_immed)
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.set _reps, 1
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.elseif (2 << (\line_width)) > (\max_immed)
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.set _reps, 2
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.else
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.set _reps, 4
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.endif
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__loopi \ar, \at, \size, (_reps << (\line_width))
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.set _index, 0
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.rep _reps
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\insn \ar, _index << (\line_width)
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.set _index, _index + 1
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.endr
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__endla \ar, \at, _reps << (\line_width)
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.endm
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.macro __loop_cache_all ar at insn size line_width max_immed
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movi \ar, 0
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__loop_cache_unroll \ar, \at, \insn, \size, \line_width, \max_immed
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.endm
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.macro __loop_cache_range ar as at insn line_width
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extui \at, \ar, 0, \line_width
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add \as, \as, \at
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__loops \ar, \as, \at, \line_width
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\insn \ar, 0
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__endla \ar, \at, (1 << (\line_width))
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.endm
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.macro __loop_cache_page ar at insn line_width max_immed
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__loop_cache_unroll \ar, \at, \insn, PAGE_SIZE, \line_width, \max_immed
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.endm
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.macro ___unlock_dcache_all ar at
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#if XCHAL_DCACHE_LINE_LOCKABLE && XCHAL_DCACHE_SIZE
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__loop_cache_all \ar \at diu XCHAL_DCACHE_SIZE \
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XCHAL_DCACHE_LINEWIDTH 240
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#endif
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.endm
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.macro ___unlock_icache_all ar at
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#if XCHAL_ICACHE_LINE_LOCKABLE && XCHAL_ICACHE_SIZE
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__loop_cache_all \ar \at iiu XCHAL_ICACHE_SIZE \
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XCHAL_ICACHE_LINEWIDTH 240
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#endif
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.endm
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.macro ___flush_invalidate_dcache_all ar at
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#if XCHAL_DCACHE_SIZE
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__loop_cache_all \ar \at diwbi XCHAL_DCACHE_SIZE \
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XCHAL_DCACHE_LINEWIDTH 240
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#endif
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.endm
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.macro ___flush_dcache_all ar at
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#if XCHAL_DCACHE_SIZE
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__loop_cache_all \ar \at diwb XCHAL_DCACHE_SIZE \
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XCHAL_DCACHE_LINEWIDTH 240
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#endif
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.endm
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.macro ___invalidate_dcache_all ar at
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#if XCHAL_DCACHE_SIZE
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__loop_cache_all \ar \at dii XCHAL_DCACHE_SIZE \
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XCHAL_DCACHE_LINEWIDTH 1020
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#endif
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.endm
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.macro ___invalidate_icache_all ar at
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#if XCHAL_ICACHE_SIZE
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__loop_cache_all \ar \at iii XCHAL_ICACHE_SIZE \
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XCHAL_ICACHE_LINEWIDTH 1020
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#endif
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.endm
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.macro ___flush_invalidate_dcache_range ar as at
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#if XCHAL_DCACHE_SIZE
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__loop_cache_range \ar \as \at dhwbi XCHAL_DCACHE_LINEWIDTH
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#endif
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.endm
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.macro ___flush_dcache_range ar as at
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#if XCHAL_DCACHE_SIZE
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__loop_cache_range \ar \as \at dhwb XCHAL_DCACHE_LINEWIDTH
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#endif
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.endm
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.macro ___invalidate_dcache_range ar as at
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#if XCHAL_DCACHE_SIZE
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__loop_cache_range \ar \as \at dhi XCHAL_DCACHE_LINEWIDTH
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#endif
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.endm
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.macro ___invalidate_icache_range ar as at
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#if XCHAL_ICACHE_SIZE
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__loop_cache_range \ar \as \at ihi XCHAL_ICACHE_LINEWIDTH
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#endif
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.endm
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.macro ___flush_invalidate_dcache_page ar as
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#if XCHAL_DCACHE_SIZE
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__loop_cache_page \ar \as dhwbi XCHAL_DCACHE_LINEWIDTH 1020
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#endif
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.endm
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.macro ___flush_dcache_page ar as
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#if XCHAL_DCACHE_SIZE
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__loop_cache_page \ar \as dhwb XCHAL_DCACHE_LINEWIDTH 1020
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#endif
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.endm
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.macro ___invalidate_dcache_page ar as
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#if XCHAL_DCACHE_SIZE
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__loop_cache_page \ar \as dhi XCHAL_DCACHE_LINEWIDTH 1020
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#endif
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.endm
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.macro ___invalidate_icache_page ar as
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#if XCHAL_ICACHE_SIZE
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__loop_cache_page \ar \as ihi XCHAL_ICACHE_LINEWIDTH 1020
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#endif
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.endm
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