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/cdefs.h> 18 19 #include <sys/param.h> 20 21 #include <btxv86.h> 22 23 #include "stand.h" 24 #include "rbx.h" 25 #include "drv.h" 26 #include "edd.h" 27 28 static struct edd_params params; 29 30 uint64_t 31 drvsize(struct dsk *dskp) 32 { 33 34 params.len = sizeof (struct edd_params); 35 v86.ctl = V86_FLAGS; 36 v86.addr = 0x13; 37 v86.eax = 0x4800; 38 v86.edx = dskp->drive; 39 v86.ds = VTOPSEG(¶ms); 40 v86.esi = VTOPOFF(¶ms); 41 v86int(); 42 if (V86_CY(v86.efl)) { 43 printf("error %u\n", v86.eax >> 8 & 0xff); 44 return (0); 45 } 46 return (params.sectors); 47 } 48 49 static struct edd_packet packet; 50 51 int 52 drvread(struct dsk *dskp, void *buf, daddr_t lba, unsigned nblk) 53 { 54 static unsigned c = 0x2d5c7c2f; 55 56 if (!OPT_CHECK(RBX_QUIET)) 57 printf("%c\b", c = c << 8 | c >> 24); 58 packet.len = sizeof (struct edd_packet); 59 packet.count = nblk; 60 packet.off = VTOPOFF(buf); 61 packet.seg = VTOPSEG(buf); 62 packet.lba = lba; 63 v86.ctl = V86_FLAGS; 64 v86.addr = 0x13; 65 v86.eax = 0x4200; 66 v86.edx = dskp->drive; 67 v86.ds = VTOPSEG(&packet); 68 v86.esi = VTOPOFF(&packet); 69 v86int(); 70 if (V86_CY(v86.efl)) { 71 printf("%s: error %u lba %llu\n", 72 BOOTPROG, v86.eax >> 8 & 0xff, lba); 73 return (-1); 74 } 75 return (0); 76 } 77 78 int 79 drvwrite(struct dsk *dskp, void *buf, daddr_t lba, unsigned nblk) 80 { 81 82 packet.len = sizeof (struct edd_packet); 83 packet.count = nblk; 84 packet.off = VTOPOFF(buf); 85 packet.seg = VTOPSEG(buf); 86 packet.lba = lba; 87 v86.ctl = V86_FLAGS; 88 v86.addr = 0x13; 89 v86.eax = 0x4300; 90 v86.edx = dskp->drive; 91 v86.ds = VTOPSEG(&packet); 92 v86.esi = VTOPOFF(&packet); 93 v86int(); 94 if (V86_CY(v86.efl)) { 95 printf("error %u lba %llu\n", v86.eax >> 8 & 0xff, lba); 96 return (-1); 97 } 98 return (0); 99 } 100