1 /*- 2 * Copyright (c) 1998 Robert Nordier 3 * Copyright (c) 2010 Pawel Jakub Dawidek <pjd@FreeBSD.org> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms are freely 7 * permitted provided that the above copyright notice and this 8 * paragraph and the following disclaimer are duplicated in all 9 * such forms. 10 * 11 * This software is provided "AS IS" and without any express or 12 * implied warranties, including, without limitation, the implied 13 * warranties of merchantability and fitness for a particular 14 * purpose. 15 */ 16 17 #include <sys/param.h> 18 19 #include <btxv86.h> 20 21 #include "stand.h" 22 #include "rbx.h" 23 #include "drv.h" 24 #include "edd.h" 25 26 static struct edd_params params; 27 28 uint64_t 29 drvsize(struct dsk *dskp) 30 { 31 32 params.len = sizeof(struct edd_params); 33 v86.ctl = V86_FLAGS; 34 v86.addr = 0x13; 35 v86.eax = 0x4800; 36 v86.edx = dskp->drive; 37 v86.ds = VTOPSEG(¶ms); 38 v86.esi = VTOPOFF(¶ms); 39 v86int(); 40 if (V86_CY(v86.efl)) { 41 printf("error %u\n", v86.eax >> 8 & 0xff); 42 return (0); 43 } 44 return (params.sectors); 45 } 46 47 static struct edd_packet packet; 48 49 int 50 drvread(struct dsk *dskp, void *buf, daddr_t lba, unsigned nblk) 51 { 52 static unsigned c = 0x2d5c7c2f; 53 54 if (!OPT_CHECK(RBX_QUIET)) 55 printf("%c\b", c = c << 8 | c >> 24); 56 packet.len = sizeof(struct edd_packet); 57 packet.count = nblk; 58 packet.off = VTOPOFF(buf); 59 packet.seg = VTOPSEG(buf); 60 packet.lba = lba; 61 v86.ctl = V86_FLAGS; 62 v86.addr = 0x13; 63 v86.eax = 0x4200; 64 v86.edx = dskp->drive; 65 v86.ds = VTOPSEG(&packet); 66 v86.esi = VTOPOFF(&packet); 67 v86int(); 68 if (V86_CY(v86.efl)) { 69 printf("%s: error %u lba %llu\n", 70 BOOTPROG, v86.eax >> 8 & 0xff, lba); 71 return (-1); 72 } 73 return (0); 74 } 75 76 #if defined(GPT) || defined(ZFS) 77 int 78 drvwrite(struct dsk *dskp, void *buf, daddr_t lba, unsigned nblk) 79 { 80 81 packet.len = sizeof(struct edd_packet); 82 packet.count = nblk; 83 packet.off = VTOPOFF(buf); 84 packet.seg = VTOPSEG(buf); 85 packet.lba = lba; 86 v86.ctl = V86_FLAGS; 87 v86.addr = 0x13; 88 v86.eax = 0x4300; 89 v86.edx = dskp->drive; 90 v86.ds = VTOPSEG(&packet); 91 v86.esi = VTOPOFF(&packet); 92 v86int(); 93 if (V86_CY(v86.efl)) { 94 printf("error %u lba %llu\n", v86.eax >> 8 & 0xff, lba); 95 return (-1); 96 } 97 return (0); 98 } 99 #endif /* GPT || ZFS */ 100