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29 * @(#)reboot.h 8.1 (Berkeley) 6/2/93
33 * Arguments to reboot system call.
34 * These are passed to boot program in r11,
37 #define RB_AUTOBOOT 0 /* flags for system auto-booting itself */
39 #define RB_ASKNAME 0x01 /* ask for file name to reboot from */
40 #define RB_SINGLE 0x02 /* reboot to single user only */
41 #define RB_NOSYNC 0x04 /* don't sync before reboot */
42 #define RB_HALT 0x08 /* don't reboot, just halt */
43 #define RB_INITNAME 0x10 /* name given for /etc/init (unused) */
44 #define RB_DFLTROOT 0x20 /* use compiled-in rootdev */
45 #define RB_KDB 0x40 /* give control to kernel debugger */
46 #define RB_RDONLY 0x80 /* mount root fs read-only */
47 #define RB_DUMP 0x100 /* dump kernel memory before reboot */
48 #define RB_MINIROOT 0x200 /* mini-root present in memory at boot time */
51 * Constants for converting boot-style device number to type,
52 * adaptor (uba, mba, etc), unit number and partition number.
53 * Type (== major device number) is in the low byte
54 * for backward compatibility. Except for that of the "magic
55 * number", each mask applies to the shifted value.
57 * (4) (4) (4) (4) (8) (8)
58 * --------------------------------
59 * |MA | AD| CT| UN| PART | TYPE |
60 * --------------------------------
62 #define B_ADAPTORSHIFT 24
63 #define B_ADAPTORMASK 0x0f
64 #define B_ADAPTOR(val) (((val) >> B_ADAPTORSHIFT) & B_ADAPTORMASK)
65 #define B_CONTROLLERSHIFT 20
66 #define B_CONTROLLERMASK 0xf
67 #define B_CONTROLLER(val) (((val)>>B_CONTROLLERSHIFT) & B_CONTROLLERMASK)
68 #define B_UNITSHIFT 16
69 #define B_UNITMASK 0xf
70 #define B_UNIT(val) (((val) >> B_UNITSHIFT) & B_UNITMASK)
71 #define B_PARTITIONSHIFT 8
72 #define B_PARTITIONMASK 0xff
73 #define B_PARTITION(val) (((val) >> B_PARTITIONSHIFT) & B_PARTITIONMASK)
75 #define B_TYPEMASK 0xff
76 #define B_TYPE(val) (((val) >> B_TYPESHIFT) & B_TYPEMASK)
78 #define B_MAGICMASK ((u_long)0xf0000000)
79 #define B_DEVMAGIC ((u_long)0xa0000000)
81 #define MAKEBOOTDEV(type, adaptor, controller, unit, partition) \
82 (((type) << B_TYPESHIFT) | ((adaptor) << B_ADAPTORSHIFT) | \
83 ((controller) << B_CONTROLLERSHIFT) | ((unit) << B_UNITSHIFT) | \
84 ((partition) << B_PARTITIONSHIFT) | B_DEVMAGIC)