void device_setup(void) { extern void console_map_init(void); struct gendisk *p; int nr=0; chr_dev_init(); blk_dev_init(); sti(); #ifdef CONFIG_SCSI scsi_dev_init(); #endif #ifdef CONFIG_INET net_dev_init(); #endif console_map_init(); for (p = gendisk_head ; p ; p=p->next) { setup_dev(p); nr += p->nr_real; } #ifdef CONFIG_BLK_DEV_RAM #ifdef CONFIG_BLK_DEV_INITRD if (initrd_start && mount_initrd) initrd_load(); else #endif rd_load(); #endif }
void device_setup(void) { register struct gendisk *p; chr_dev_init(); blk_dev_init(); set_irq(); for (p = gendisk_head; p; p = p->next) setup_dev(p); #ifdef CONFIG_BLK_DEV_RAM rd_load(); #endif }
/* This may be used only once, enforced by 'static int callable' */ int sys_setup(void * BIOS) { static int callable = 1; int i,drive; unsigned char cmos_disks; if (!callable) return -1; callable = 0; #ifndef HD_TYPE for (drive=0 ; drive<2 ; drive++) { hd_info[drive].cyl = *(unsigned short *) BIOS; hd_info[drive].head = *(unsigned char *) (2+BIOS); hd_info[drive].wpcom = *(unsigned short *) (5+BIOS); hd_info[drive].ctl = *(unsigned char *) (8+BIOS); hd_info[drive].lzone = *(unsigned short *) (12+BIOS); hd_info[drive].sect = *(unsigned char *) (14+BIOS); BIOS += 16; } if (hd_info[1].cyl) NR_HD=2; else NR_HD=1; #endif for (i=0 ; i<NR_HD ; i++) { hd[i<<6].start_sect = 0; hd[i<<6].nr_sects = hd_info[i].head* hd_info[i].sect*hd_info[i].cyl; } /* We querry CMOS about hard disks : it could be that we have a SCSI/ESDI/etc controller that is BIOS compatable with ST-506, and thus showing up in our BIOS table, but not register compatable, and therefore not present in CMOS. Furthurmore, we will assume that our ST-506 drives <if any> are the primary drives in the system, and the ones reflected as drive 1 or 2. The first drive is stored in the high nibble of CMOS byte 0x12, the second in the low nibble. This will be either a 4 bit drive type or 0xf indicating use byte 0x19 for an 8 bit type, drive 1, 0x1a for drive 2 in CMOS. Needless to say, a non-zero value means we have an AT controller hard disk for that drive. */ if ((cmos_disks = CMOS_READ(0x12)) & 0xf0) if (cmos_disks & 0x0f) NR_HD = 2; else NR_HD = 1; else NR_HD = 0; for (i = NR_HD ; i < 2 ; i++) { hd[i<<6].start_sect = 0; hd[i<<6].nr_sects = 0; } for (drive=0 ; drive<NR_HD ; drive++) { current_minor = 1+(drive<<6); check_partition(0x0300+(drive<<6)); } for (i=0 ; i<(MAX_HD<<6) ; i++) hd_sizes[i] = hd[i].nr_sects>>1 ; blk_size[MAJOR_NR] = hd_sizes; if (NR_HD) printk("Partition table%s ok.\n\r",(NR_HD>1)?"s":""); rd_load(); mount_root(); return (0); }
/* This may be used only once, enforced by 'static int callable' */ int sys_setup(void * BIOS) { static int callable = 1; int i,drive; unsigned char cmos_disks; struct partition *p; struct buffer_head * bh; if (!callable) return -1; callable = 0; #ifndef HD_TYPE for (drive=0 ; drive<2 ; drive++) { hd_info[drive].cyl = *(unsigned short *) BIOS; hd_info[drive].head = *(unsigned char *) (2+BIOS); hd_info[drive].wpcom = *(unsigned short *) (5+BIOS); hd_info[drive].ctl = *(unsigned char *) (8+BIOS); hd_info[drive].lzone = *(unsigned short *) (12+BIOS); hd_info[drive].sect = *(unsigned char *) (14+BIOS); BIOS += 16; } if (hd_info[1].cyl) NR_HD=2; else NR_HD=1; #endif for (i=0 ; i<NR_HD ; i++) { hd[i*5].start_sect = 0; hd[i*5].nr_sects = hd_info[i].head* hd_info[i].sect*hd_info[i].cyl; } /* We querry CMOS about hard disks : it could be that we have a SCSI/ESDI/etc controller that is BIOS compatable with ST-506, and thus showing up in our BIOS table, but not register compatable, and therefore not present in CMOS. Furthurmore, we will assume that our ST-506 drives <if any> are the primary drives in the system, and the ones reflected as drive 1 or 2. The first drive is stored in the high nibble of CMOS byte 0x12, the second in the low nibble. This will be either a 4 bit drive type or 0xf indicating use byte 0x19 for an 8 bit type, drive 1, 0x1a for drive 2 in CMOS. Needless to say, a non-zero value means we have an AT controller hard disk for that drive. */ if ((cmos_disks = CMOS_READ(0x12)) & 0xf0) if (cmos_disks & 0x0f) NR_HD = 2; else NR_HD = 1; else NR_HD = 0; for (i = NR_HD ; i < 2 ; i++) { hd[i*5].start_sect = 0; hd[i*5].nr_sects = 0; } for (drive=0 ; drive<NR_HD ; drive++) { if (!(bh = bread(0x300 + drive*5,0))) { printk("Unable to read partition table of drive %d\n\r", drive); panic(""); } if (bh->b_data[510] != 0x55 || (unsigned char) bh->b_data[511] != 0xAA) { printk("Bad partition table on drive %d\n\r",drive); panic(""); } p = 0x1BE + (void *)bh->b_data; for (i=1;i<5;i++,p++) { hd[i+5*drive].start_sect = p->start_sect; hd[i+5*drive].nr_sects = p->nr_sects; } brelse(bh); } if (NR_HD) printk("Partition table%s ok.\n\r",(NR_HD>1)?"s":""); rd_load(); mount_root(); return (0); }