101 lines
2.2 KiB
C
101 lines
2.2 KiB
C
/*-
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* Copyright (c) 1998 Robert Nordier
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* Copyright (c) 2010 Pawel Jakub Dawidek <pjd@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are freely
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* permitted provided that the above copyright notice and this
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* paragraph and the following disclaimer are duplicated in all
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* such forms.
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*
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* This software is provided "AS IS" and without any express or
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* implied warranties, including, without limitation, the implied
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* warranties of merchantability and fitness for a particular
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* purpose.
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*/
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#include <sys/cdefs.h>
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#include <sys/param.h>
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#include <btxv86.h>
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#include "stand.h"
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#include "rbx.h"
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#include "drv.h"
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#include "edd.h"
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static struct edd_params params;
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uint64_t
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drvsize(struct dsk *dskp)
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{
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params.len = sizeof(struct edd_params);
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v86.ctl = V86_FLAGS;
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v86.addr = 0x13;
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v86.eax = 0x4800;
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v86.edx = dskp->drive;
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v86.ds = VTOPSEG(¶ms);
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v86.esi = VTOPOFF(¶ms);
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v86int();
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if (V86_CY(v86.efl)) {
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printf("error %u\n", v86.eax >> 8 & 0xff);
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return (0);
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}
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return (params.sectors);
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}
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static struct edd_packet packet;
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int
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drvread(struct dsk *dskp, void *buf, daddr_t lba, unsigned nblk)
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{
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static unsigned c = 0x2d5c7c2f;
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if (!OPT_CHECK(RBX_QUIET))
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printf("%c\b", c = c << 8 | c >> 24);
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packet.len = sizeof(struct edd_packet);
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packet.count = nblk;
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packet.off = VTOPOFF(buf);
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packet.seg = VTOPSEG(buf);
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packet.lba = lba;
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v86.ctl = V86_FLAGS;
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v86.addr = 0x13;
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v86.eax = 0x4200;
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v86.edx = dskp->drive;
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v86.ds = VTOPSEG(&packet);
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v86.esi = VTOPOFF(&packet);
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v86int();
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if (V86_CY(v86.efl)) {
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printf("%s: error %u lba %llu\n",
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BOOTPROG, v86.eax >> 8 & 0xff, lba);
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return (-1);
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}
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return (0);
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}
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#if defined(GPT) || defined(ZFS)
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int
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drvwrite(struct dsk *dskp, void *buf, daddr_t lba, unsigned nblk)
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{
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packet.len = sizeof(struct edd_packet);
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packet.count = nblk;
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packet.off = VTOPOFF(buf);
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packet.seg = VTOPSEG(buf);
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packet.lba = lba;
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v86.ctl = V86_FLAGS;
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v86.addr = 0x13;
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v86.eax = 0x4300;
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v86.edx = dskp->drive;
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v86.ds = VTOPSEG(&packet);
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v86.esi = VTOPOFF(&packet);
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v86int();
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if (V86_CY(v86.efl)) {
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printf("error %u lba %llu\n", v86.eax >> 8 & 0xff, lba);
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return (-1);
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}
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return (0);
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}
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#endif /* GPT || ZFS */
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