| 1 | /*
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| 2 | * Copyright (c) 2006 Jakub Jermar
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | #include <arch/arch.h>
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| 30 |
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| 31 | #define DCACHE_SIZE (16 * 1024)
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| 32 | #define DCACHE_LINE_SIZE 32
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| 33 |
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| 34 | #define DCACHE_TAG_SHIFT 2
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| 35 |
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| 36 | .register %g2, #scratch
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| 37 | .register %g3, #scratch
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| 38 |
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| 39 | /** Flush the whole D-cache. */
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| 40 | .global dcache_flush
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| 41 | dcache_flush:
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| 42 | set (DCACHE_SIZE - DCACHE_LINE_SIZE), %g1
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| 43 | stxa %g0, [%g1] ASI_DCACHE_TAG
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| 44 | 0: membar #Sync
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| 45 | subcc %g1, DCACHE_LINE_SIZE, %g1
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| 46 | bnz,pt %xcc, 0b
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| 47 | stxa %g0, [%g1] ASI_DCACHE_TAG
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| 48 | membar #Sync
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| 49 | retl
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| 50 | ! beware SF Erratum #51, do not put the MEMBAR here
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| 51 | nop
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| 52 |
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| 53 | /** Flush only D-cache lines of one virtual color.
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| 54 | *
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| 55 | * @param o0 Virtual color to be flushed.
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| 56 | */
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| 57 | .global dcache_flush_color
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| 58 | dcache_flush_color:
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| 59 | mov (DCACHE_SIZE / DCACHE_LINE_SIZE) / 2, %g1
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| 60 | set DCACHE_SIZE / 2, %g2
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| 61 | sllx %g2, %o0, %g2
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| 62 | sub %g2, DCACHE_LINE_SIZE, %g2
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| 63 | 0: stxa %g0, [%g2] ASI_DCACHE_TAG
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| 64 | membar #Sync
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| 65 | subcc %g1, 1, %g1
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| 66 | bnz,pt %xcc, 0b
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| 67 | sub %g2, DCACHE_LINE_SIZE, %g2
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| 68 | retl
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| 69 | nop
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| 70 |
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| 71 | /** Flush only D-cache lines of one virtual color and one tag.
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| 72 | *
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| 73 | * @param o0 Virtual color to lookup the tag.
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| 74 | * @param o1 Tag of the cachelines to be flushed.
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| 75 | */
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| 76 | .global dcache_flush_tag
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| 77 | dcache_flush_tag:
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| 78 | mov (DCACHE_SIZE / DCACHE_LINE_SIZE) / 2, %g1
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| 79 | set DCACHE_SIZE / 2, %g2
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| 80 | sllx %g2, %o0, %g2
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| 81 | sub %g2, DCACHE_LINE_SIZE, %g2
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| 82 | 0: ldxa [%g2] ASI_DCACHE_TAG, %g3
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| 83 | srlx %g3, DCACHE_TAG_SHIFT, %g3
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| 84 | cmp %g3, %o1
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| 85 | bnz 1f
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| 86 | nop
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| 87 | stxa %g0, [%g2] ASI_DCACHE_TAG
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| 88 | membar #Sync
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| 89 | 1: subcc %g1, 1, %g1
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| 90 | bnz,pt %xcc, 0b
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| 91 | sub %g2, DCACHE_LINE_SIZE, %g2
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| 92 | retl
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| 93 | nop
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