74 int disk_get_params(int disk, struct disk_info *const diskinfo)  in disk_get_params()  argument
80     memset(diskinfo, 0, sizeof *diskinfo);  in disk_get_params()
81     diskinfo->disk = disk;  in disk_get_params()
82     diskinfo->bps = SECTOR;  in disk_get_params()
95 	diskinfo->ebios = 1;  in disk_get_params()
103     if (diskinfo->ebios) {  in disk_get_params()
116 	    diskinfo->lbacnt = eparam->lbacnt;  in disk_get_params()
118 		diskinfo->bps = eparam->bps;  in disk_get_params()
137 	rv = diskinfo->ebios ? 0 : -1;  in disk_get_params()
141     diskinfo->spt = 0x3f & outreg.ecx.b[0];  in disk_get_params()
142     diskinfo->head = 1 + outreg.edx.b[1];  in disk_get_params()
143     diskinfo->cyl = 1 + (outreg.ecx.b[1] | ((outreg.ecx.b[0] & 0xc0u) << 2));  in disk_get_params()
145     if (diskinfo->spt)  in disk_get_params()
146 	diskinfo->cbios = 1;	/* Valid geometry */  in disk_get_params()
148 	diskinfo->head = 1;  in disk_get_params()
149 	diskinfo->spt = 1;  in disk_get_params()
150 	diskinfo->cyl = 1;  in disk_get_params()
153     if (!diskinfo->lbacnt)  in disk_get_params()
154 	diskinfo->lbacnt = diskinfo->cyl * diskinfo->head * diskinfo->spt;  in disk_get_params()
171 static void *ebios_setup(const struct disk_info *const diskinfo, com32sys_t *inreg,  in ebios_setup()  argument
183     buf = lmalloc(count * diskinfo->bps);  in ebios_setup()
196     inreg->edx.b[0] = diskinfo->disk;  in ebios_setup()
211 static void *chs_setup(const struct disk_info *const diskinfo, com32sys_t *inreg,  in chs_setup()  argument
217     buf = lmalloc(count * diskinfo->bps);  in chs_setup()
227     s = lba % diskinfo->spt;  in chs_setup()
228     t = lba / diskinfo->spt;  in chs_setup()
229     h = t % diskinfo->head;  in chs_setup()
230     c = t / diskinfo->head;  in chs_setup()
238     inreg->edx.b[0] = diskinfo->disk;  in chs_setup()
256 void *disk_read_sectors(const struct disk_info *const diskinfo, uint64_t lba,  in disk_read_sectors()  argument
265     maxcnt = (size - diskinfo->bps) / diskinfo->bps;  in disk_read_sectors()
266     if (!count || count > maxcnt || lba + count > diskinfo->lbacnt)  in disk_read_sectors()
271     if (diskinfo->ebios)  in disk_read_sectors()
272 	buf = ebios_setup(diskinfo, &inreg, lba, count, EBIOS_READ_CODE);  in disk_read_sectors()
274 	buf = chs_setup(diskinfo, &inreg, lba, count, CHS_READ_CODE);  in disk_read_sectors()
282     data = malloc(count * diskinfo->bps);  in disk_read_sectors()
284 	memcpy(data, buf, count * diskinfo->bps);  in disk_read_sectors()
302 int disk_write_sectors(const struct disk_info *const diskinfo, uint64_t lba,  in disk_write_sectors()  argument
311     maxcnt = (size - diskinfo->bps) / diskinfo->bps;  in disk_write_sectors()
312     if (!count || count > maxcnt || lba + count > diskinfo->lbacnt)  in disk_write_sectors()
317     if (diskinfo->ebios)  in disk_write_sectors()
318 	buf = ebios_setup(diskinfo, &inreg, lba, count, EBIOS_WRITE_CODE);  in disk_write_sectors()
320 	buf = chs_setup(diskinfo, &inreg, lba, count, CHS_WRITE_CODE);  in disk_write_sectors()
325     memcpy(buf, data, count * diskinfo->bps);  in disk_write_sectors()
349 int disk_write_verify_sectors(const struct disk_info *const diskinfo,  in disk_write_verify_sectors()  argument
355     rv = disk_write_sectors(diskinfo, lba, buf, count);  in disk_write_verify_sectors()
358     rb = disk_read_sectors(diskinfo, lba, count);  in disk_write_verify_sectors()
361     rv = memcmp(buf, rb, count * diskinfo->bps);  in disk_write_verify_sectors()