efidisk_ll.c revision 1.1.2.2
1 1.1.2.2 skrll /* $NetBSD: efidisk_ll.c,v 1.1.2.2 2017/02/05 13:40:12 skrll Exp $ */ 2 1.1.2.2 skrll /* NetBSD: biosdisk_ll.c,v 1.31 2011/02/21 02:58:02 jakllsch Exp */ 3 1.1.2.2 skrll 4 1.1.2.2 skrll /*- 5 1.1.2.2 skrll * Copyright (c) 2005 The NetBSD Foundation, Inc. 6 1.1.2.2 skrll * All rights reserved. 7 1.1.2.2 skrll * 8 1.1.2.2 skrll * This code is derived from software contributed to The NetBSD Foundation 9 1.1.2.2 skrll * by Bang Jun-Young. 10 1.1.2.2 skrll * 11 1.1.2.2 skrll * Redistribution and use in source and binary forms, with or without 12 1.1.2.2 skrll * modification, are permitted provided that the following conditions 13 1.1.2.2 skrll * are met: 14 1.1.2.2 skrll * 1. Redistributions of source code must retain the above copyright 15 1.1.2.2 skrll * notice, this list of conditions and the following disclaimer. 16 1.1.2.2 skrll * 2. Redistributions in binary form must reproduce the above copyright 17 1.1.2.2 skrll * notice, this list of conditions and the following disclaimer in the 18 1.1.2.2 skrll * documentation and/or other materials provided with the distribution. 19 1.1.2.2 skrll * 20 1.1.2.2 skrll * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 1.1.2.2 skrll * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 1.1.2.2 skrll * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 1.1.2.2 skrll * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 1.1.2.2 skrll * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 1.1.2.2 skrll * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 1.1.2.2 skrll * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 1.1.2.2 skrll * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 1.1.2.2 skrll * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 1.1.2.2 skrll * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 1.1.2.2 skrll * POSSIBILITY OF SUCH DAMAGE. 31 1.1.2.2 skrll */ 32 1.1.2.2 skrll 33 1.1.2.2 skrll /* 34 1.1.2.2 skrll * Copyright (c) 1996 35 1.1.2.2 skrll * Matthias Drochner. All rights reserved. 36 1.1.2.2 skrll * Copyright (c) 1996 37 1.1.2.2 skrll * Perry E. Metzger. All rights reserved. 38 1.1.2.2 skrll * 39 1.1.2.2 skrll * Redistribution and use in source and binary forms, with or without 40 1.1.2.2 skrll * modification, are permitted provided that the following conditions 41 1.1.2.2 skrll * are met: 42 1.1.2.2 skrll * 1. Redistributions of source code must retain the above copyright 43 1.1.2.2 skrll * notice, this list of conditions and the following disclaimer. 44 1.1.2.2 skrll * 2. Redistributions in binary form must reproduce the above copyright 45 1.1.2.2 skrll * notice, this list of conditions and the following disclaimer in the 46 1.1.2.2 skrll * documentation and/or other materials provided with the distribution. 47 1.1.2.2 skrll * 3. All advertising materials mentioning features or use of this software 48 1.1.2.2 skrll * must display the following acknowledgements: 49 1.1.2.2 skrll * This product includes software developed for the NetBSD Project 50 1.1.2.2 skrll * by Matthias Drochner. 51 1.1.2.2 skrll * This product includes software developed for the NetBSD Project 52 1.1.2.2 skrll * by Perry E. Metzger. 53 1.1.2.2 skrll * 4. The names of the authors may not be used to endorse or promote products 54 1.1.2.2 skrll * derived from this software without specific prior written permission. 55 1.1.2.2 skrll * 56 1.1.2.2 skrll * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 57 1.1.2.2 skrll * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 58 1.1.2.2 skrll * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 59 1.1.2.2 skrll * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 60 1.1.2.2 skrll * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 61 1.1.2.2 skrll * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 62 1.1.2.2 skrll * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 63 1.1.2.2 skrll * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 64 1.1.2.2 skrll * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 65 1.1.2.2 skrll * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 66 1.1.2.2 skrll */ 67 1.1.2.2 skrll 68 1.1.2.2 skrll /* 69 1.1.2.2 skrll * shared by bootsector startup (bootsectmain) and biosdisk.c 70 1.1.2.2 skrll * needs lowlevel parts from bios_disk.S 71 1.1.2.2 skrll */ 72 1.1.2.2 skrll 73 1.1.2.2 skrll #include "efiboot.h" 74 1.1.2.2 skrll 75 1.1.2.2 skrll #include "biosdisk_ll.h" 76 1.1.2.2 skrll #include "diskbuf.h" 77 1.1.2.2 skrll #include "efidisk.h" 78 1.1.2.2 skrll 79 1.1.2.2 skrll static int do_read(struct biosdisk_ll *, daddr_t, int, char *); 80 1.1.2.2 skrll 81 1.1.2.2 skrll #ifndef BIOSDISK_RETRIES 82 1.1.2.2 skrll #define BIOSDISK_RETRIES 5 83 1.1.2.2 skrll #endif 84 1.1.2.2 skrll 85 1.1.2.2 skrll int 86 1.1.2.2 skrll set_geometry(struct biosdisk_ll *d, struct biosdisk_extinfo *ed) 87 1.1.2.2 skrll { 88 1.1.2.2 skrll const struct efidiskinfo *edi; 89 1.1.2.2 skrll EFI_BLOCK_IO_MEDIA *media; 90 1.1.2.2 skrll 91 1.1.2.2 skrll edi = efidisk_getinfo(d->dev); 92 1.1.2.2 skrll if (edi == NULL) 93 1.1.2.2 skrll return 1; 94 1.1.2.2 skrll 95 1.1.2.2 skrll media = edi->bio->Media; 96 1.1.2.2 skrll 97 1.1.2.2 skrll d->secsize = media->BlockSize; 98 1.1.2.2 skrll d->type = BIOSDISK_TYPE_HD; 99 1.1.2.2 skrll d->flags = BIOSDISK_INT13EXT; 100 1.1.2.2 skrll 101 1.1.2.2 skrll ed->totsec = media->LastBlock + 1; 102 1.1.2.2 skrll ed->sbytes = media->BlockSize; 103 1.1.2.2 skrll ed->flags = 0; 104 1.1.2.2 skrll if (media->RemovableMedia) 105 1.1.2.2 skrll ed->flags |= EXTINFO_REMOVABLE; 106 1.1.2.2 skrll 107 1.1.2.2 skrll return 0; 108 1.1.2.2 skrll } 109 1.1.2.2 skrll 110 1.1.2.2 skrll /* 111 1.1.2.2 skrll * Global shared "diskbuf" is used as read ahead buffer. For reading from 112 1.1.2.2 skrll * floppies, the bootstrap has to be loaded on a 64K boundary to ensure that 113 1.1.2.2 skrll * this buffer doesn't cross a 64K DMA boundary. 114 1.1.2.2 skrll */ 115 1.1.2.2 skrll static int ra_dev; 116 1.1.2.2 skrll static daddr_t ra_end; 117 1.1.2.2 skrll static daddr_t ra_first; 118 1.1.2.2 skrll 119 1.1.2.2 skrll static int 120 1.1.2.2 skrll do_read(struct biosdisk_ll *d, daddr_t dblk, int num, char *buf) 121 1.1.2.2 skrll { 122 1.1.2.2 skrll EFI_STATUS status; 123 1.1.2.2 skrll const struct efidiskinfo *edi; 124 1.1.2.2 skrll 125 1.1.2.2 skrll edi = efidisk_getinfo(d->dev); 126 1.1.2.2 skrll if (edi == NULL) 127 1.1.2.2 skrll return -1; 128 1.1.2.2 skrll 129 1.1.2.2 skrll status = uefi_call_wrapper(edi->bio->ReadBlocks, 5, edi->bio, 130 1.1.2.2 skrll edi->media_id, dblk, num * d->secsize, buf); 131 1.1.2.2 skrll if (EFI_ERROR(status)) 132 1.1.2.2 skrll return -1; 133 1.1.2.2 skrll return num; 134 1.1.2.2 skrll } 135 1.1.2.2 skrll 136 1.1.2.2 skrll /* 137 1.1.2.2 skrll * NB if 'cold' is set below not all of the program is loaded, so 138 1.1.2.2 skrll * mustn't use data segment, bss, call library functions or do read-ahead. 139 1.1.2.2 skrll */ 140 1.1.2.2 skrll int 141 1.1.2.2 skrll readsects(struct biosdisk_ll *d, daddr_t dblk, int num, char *buf, int cold) 142 1.1.2.2 skrll { 143 1.1.2.2 skrll while (num) { 144 1.1.2.2 skrll int nsec; 145 1.1.2.2 skrll 146 1.1.2.2 skrll /* check for usable data in read-ahead buffer */ 147 1.1.2.2 skrll if (cold || diskbuf_user != &ra_dev || d->dev != ra_dev 148 1.1.2.2 skrll || dblk < ra_first || dblk >= ra_end) { 149 1.1.2.2 skrll 150 1.1.2.2 skrll /* no, read from disk */ 151 1.1.2.2 skrll char *trbuf; 152 1.1.2.2 skrll int maxsecs; 153 1.1.2.2 skrll int retries = BIOSDISK_RETRIES; 154 1.1.2.2 skrll 155 1.1.2.2 skrll if (cold) { 156 1.1.2.2 skrll /* transfer directly to buffer */ 157 1.1.2.2 skrll trbuf = buf; 158 1.1.2.2 skrll maxsecs = num; 159 1.1.2.2 skrll } else { 160 1.1.2.2 skrll /* fill read-ahead buffer */ 161 1.1.2.2 skrll trbuf = alloc_diskbuf(0); /* no data yet */ 162 1.1.2.2 skrll maxsecs = DISKBUFSIZE / d->secsize; 163 1.1.2.2 skrll } 164 1.1.2.2 skrll 165 1.1.2.2 skrll while ((nsec = do_read(d, dblk, maxsecs, trbuf)) < 0) { 166 1.1.2.2 skrll #ifdef DISK_DEBUG 167 1.1.2.2 skrll if (!cold) 168 1.1.2.2 skrll printf("read error dblk %"PRId64"-%"PRId64"\n", 169 1.1.2.2 skrll dblk, (dblk + maxsecs - 1)); 170 1.1.2.2 skrll #endif 171 1.1.2.2 skrll if (--retries >= 0) 172 1.1.2.2 skrll continue; 173 1.1.2.2 skrll return -1; /* XXX cannot output here if 174 1.1.2.2 skrll * (cold) */ 175 1.1.2.2 skrll } 176 1.1.2.2 skrll if (!cold) { 177 1.1.2.2 skrll ra_dev = d->dev; 178 1.1.2.2 skrll ra_first = dblk; 179 1.1.2.2 skrll ra_end = dblk + nsec; 180 1.1.2.2 skrll diskbuf_user = &ra_dev; 181 1.1.2.2 skrll } 182 1.1.2.2 skrll } else /* can take blocks from end of read-ahead 183 1.1.2.2 skrll * buffer */ 184 1.1.2.2 skrll nsec = ra_end - dblk; 185 1.1.2.2 skrll 186 1.1.2.2 skrll if (!cold) { 187 1.1.2.2 skrll /* copy data from read-ahead to user buffer */ 188 1.1.2.2 skrll if (nsec > num) 189 1.1.2.2 skrll nsec = num; 190 1.1.2.2 skrll memcpy(buf, 191 1.1.2.2 skrll diskbufp + (dblk - ra_first) * d->secsize, 192 1.1.2.2 skrll nsec * d->secsize); 193 1.1.2.2 skrll } 194 1.1.2.2 skrll buf += nsec * d->secsize; 195 1.1.2.2 skrll num -= nsec; 196 1.1.2.2 skrll dblk += nsec; 197 1.1.2.2 skrll } 198 1.1.2.2 skrll 199 1.1.2.2 skrll return 0; 200 1.1.2.2 skrll } 201
Indexes created Tue Oct 21 08:09:48 GMT 2025