| 1 | /* |
| 2 | * ========== Copyright Header Begin ========================================== |
| 3 | * |
| 4 | * Hypervisor Software File: vdev_simdisk.s |
| 5 | * |
| 6 | * Copyright (c) 2006 Sun Microsystems, Inc. All Rights Reserved. |
| 7 | * |
| 8 | * - Do no alter or remove copyright notices |
| 9 | * |
| 10 | * - Redistribution and use of this software in source and binary forms, with |
| 11 | * or without modification, are permitted provided that the following |
| 12 | * conditions are met: |
| 13 | * |
| 14 | * - Redistribution of source code must retain the above copyright notice, |
| 15 | * this list of conditions and the following disclaimer. |
| 16 | * |
| 17 | * - Redistribution in binary form must reproduce the above copyright notice, |
| 18 | * this list of conditions and the following disclaimer in the |
| 19 | * documentation and/or other materials provided with the distribution. |
| 20 | * |
| 21 | * Neither the name of Sun Microsystems, Inc. or the names of contributors |
| 22 | * may be used to endorse or promote products derived from this software |
| 23 | * without specific prior written permission. |
| 24 | * |
| 25 | * This software is provided "AS IS," without a warranty of any kind. |
| 26 | * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, |
| 27 | * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A |
| 28 | * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN |
| 29 | * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR |
| 30 | * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR |
| 31 | * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN |
| 32 | * OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR |
| 33 | * FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE |
| 34 | * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, |
| 35 | * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF |
| 36 | * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. |
| 37 | * |
| 38 | * You acknowledge that this software is not designed, licensed or |
| 39 | * intended for use in the design, construction, operation or maintenance of |
| 40 | * any nuclear facility. |
| 41 | * |
| 42 | * ========== Copyright Header End ============================================ |
| 43 | */ |
| 44 | /* |
| 45 | * Copyright 2007 Sun Microsystems, Inc. All rights reserved. |
| 46 | * Use is subject to license terms. |
| 47 | */ |
| 48 | |
| 49 | .ident "@(#)vdev_simdisk.s 1.4 07/05/03 SMI" |
| 50 | |
| 51 | #ifdef CONFIG_DISK |
| 52 | |
| 53 | #include <sys/asm_linkage.h> |
| 54 | #include <hypervisor.h> |
| 55 | #include <asi.h> |
| 56 | #include <mmu.h> |
| 57 | |
| 58 | #include <guest.h> |
| 59 | #include <offsets.h> |
| 60 | #include <util.h> |
| 61 | #include <vdev_simdisk.h> |
| 62 | |
| 63 | |
| 64 | /* |
| 65 | * fake-disk read |
| 66 | * |
| 67 | * arg0 disk offset (%o0) |
| 68 | * arg1 target real address (%o1) |
| 69 | * arg2 size (%o2) |
| 70 | * -- |
| 71 | * ret0 status (%o0) |
| 72 | * ret1 size (%o1) |
| 73 | */ |
| 74 | ENTRY_NP(hcall_disk_read) |
| 75 | #ifndef SIMULATION |
| 76 | ba herr_inval |
| 77 | nop |
| 78 | #endif |
| 79 | GUEST_STRUCT(%g1) |
| 80 | RA2PA_RANGE_CONV_UNK_SIZE(%g1, %o1, %o2, herr_noraddr, %g3, %g2) |
| 81 | ! %g2 paddr |
| 82 | |
| 83 | set GUEST_DISK, %g3 |
| 84 | add %g1, %g3, %g1 |
| 85 | ! %g1 = diskp |
| 86 | |
| 87 | ldx [%g1 + DISK_SIZE], %g3 |
| 88 | brnz,pt %g3, 1f |
| 89 | cmp %o0, %g3 ! XXX this doesn't matter, just %o0+%o2 |
| 90 | |
| 91 | ldx [%g1 + DISK_PA], %g4 ! base of disk |
| 92 | cmp %g4, -1 |
| 93 | be,pn %xcc, herr_inval |
| 94 | nop |
| 95 | |
| 96 | ld [%g4 + DISK_S2NBLK_OFFSET], %g5 ! read nblks from s2 |
| 97 | sllx %g5, DISK_BLKSIZE_SHIFT, %g5 ! multiply by blocksize |
| 98 | stx %g5, [%g1 + DISK_SIZE] ! store disk size |
| 99 | mov %g5, %g3 |
| 100 | |
| 101 | cmp %o0, %g3 |
| 102 | 1: bgeu,pn %xcc, herr_inval |
| 103 | add %o0, %o2, %g4 |
| 104 | cmp %g4, %g3 |
| 105 | bgu,pn %xcc, herr_inval |
| 106 | ldx [%g1 + DISK_PA], %g3 ! base of disk |
| 107 | |
| 108 | /* bcopy(%g3 + %o0, %g2, %o2) */ |
| 109 | add %g3, %o0, %g1 |
| 110 | ! %g2 already set up |
| 111 | mov %o2, %g3 |
| 112 | ba bcopy |
| 113 | rd %pc, %g7 |
| 114 | |
| 115 | mov %o2, %o1 |
| 116 | HCALL_RET(EOK) |
| 117 | SET_SIZE(hcall_disk_read) |
| 118 | |
| 119 | /* |
| 120 | * fake-disk write |
| 121 | * |
| 122 | * arg0 disk offset (%o0) |
| 123 | * arg1 source real address (%o1) |
| 124 | * arg2 size (%o2) |
| 125 | * -- |
| 126 | * ret0 status (%o0) |
| 127 | * ret1 size (%o1) |
| 128 | */ |
| 129 | ENTRY_NP(hcall_disk_write) |
| 130 | #ifndef SIMULATION |
| 131 | ba herr_inval |
| 132 | nop |
| 133 | #endif |
| 134 | GUEST_STRUCT(%g1) |
| 135 | RA2PA_RANGE_CONV_UNK_SIZE(%g1, %o1, %o2, herr_noraddr, %g2, %g3) |
| 136 | ! %g3 paddr |
| 137 | |
| 138 | set GUEST_DISK, %g2 |
| 139 | add %g1, %g2, %g1 |
| 140 | ! %g1 = diskp |
| 141 | |
| 142 | ldx [%g1 + DISK_SIZE], %g2 |
| 143 | brnz,pt %g2, 1f |
| 144 | cmp %o0, %g2 |
| 145 | |
| 146 | ldx [%g1 + DISK_PA], %g4 ! base of disk |
| 147 | cmp %g4, -1 |
| 148 | be,pn %xcc, herr_inval |
| 149 | nop |
| 150 | |
| 151 | ld [%g4 + DISK_S2NBLK_OFFSET], %g5 ! read nblks from s2 |
| 152 | sllx %g5, DISK_BLKSIZE_SHIFT, %g5 ! multiply by blocksize |
| 153 | stx %g5, [%g1 + DISK_SIZE] ! store disk size |
| 154 | mov %g5, %g2 |
| 155 | |
| 156 | cmp %o0, %g2 |
| 157 | 1: bgeu,pn %xcc, herr_inval |
| 158 | add %o0, %o2, %g4 |
| 159 | cmp %g4, %g2 |
| 160 | bgu,pn %xcc, herr_inval |
| 161 | ldx [%g1 + DISK_PA], %g2 ! base of disk |
| 162 | |
| 163 | /* bcopy(%g3, %g2 + %o0, %o2) */ |
| 164 | mov %g3, %g1 |
| 165 | add %g2, %o0, %g2 |
| 166 | mov %o2, %g3 |
| 167 | ba bcopy |
| 168 | rd %pc, %g7 |
| 169 | |
| 170 | mov %o2, %o1 |
| 171 | HCALL_RET(EOK) |
| 172 | SET_SIZE(hcall_disk_write) |
| 173 | |
| 174 | #endif /* CONFIG_DISK */ |