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