1 /* ubavar.h 4.18 81/03/09 */ 2 3 /* 4 * This file contains definitions related to the kernel structures 5 * for dealing with the unibus adapters. 6 * 7 * Each uba has a uba_hd structure. 8 * Each unibus controller which is not a device has a uba_ctlr structure. 9 * Each unibus device has a uba_device structure. 10 */ 11 12 #ifndef LOCORE 13 /* 14 * Per-uba structure. 15 * 16 * This structure holds the interrupt vector for the uba, 17 * and its address in physical and virtual space. At boot time 18 * we determine the devices attached to the uba's and their 19 * interrupt vectors, filling in uh_vec. We free the map 20 * register and bdp resources of the uba into the structures 21 * defined here. 22 * 23 * During normal operation, resources are allocated and returned 24 * to the structures here. We watch the number of passive releases 25 * on each uba, and if the number is excessive may reset the uba. 26 * 27 * When uba resources are needed and not available, or if a device 28 * which can tolerate no other uba activity (rk07) gets on the bus, 29 * then device drivers may have to wait to get to the bus and are 30 * queued here. It is also possible for processes to block in 31 * the unibus driver in resource wait (mrwant, bdpwant); these 32 * wait states are also recorded here. 33 */ 34 struct uba_hd { 35 struct uba_regs *uh_uba; /* virt addr of uba */ 36 struct uba_regs *uh_physuba; /* phys addr of uba */ 37 int (**uh_vec)(); /* interrupt vector */ 38 struct uba_device *uh_actf; /* head of queue to transfer */ 39 struct uba_device *uh_actl; /* tail of queue to transfer */ 40 short uh_mrwant; /* someone is waiting for map reg */ 41 short uh_bdpwant; /* someone awaits bdp's */ 42 int uh_bdpfree; /* free bdp's */ 43 int uh_hangcnt; /* number of ticks hung */ 44 int uh_zvcnt; /* number of 0 vectors */ 45 short uh_users; /* transient bdp use count */ 46 short uh_xclu; /* an rk07 is using this uba! */ 47 #define UAMSIZ 25 48 struct map *uh_map; /* buffered data path regs free */ 49 }; 50 51 #ifndef LOCORE 52 /* 53 * Per-controller structure. 54 * (E.g. one for each disk and tape controller, and other things 55 * which use and release buffered data paths.) 56 * 57 * If a controller has devices attached, then there are 58 * cross-referenced uba_drive structures. 59 * This structure is the one which is queued in unibus resource wait, 60 * and saves the information about unibus resources which are used. 61 * The queue of devices waiting to transfer is also attached here. 62 */ 63 struct uba_ctlr { 64 struct uba_driver *um_driver; 65 short um_ctlr; /* controller index in driver */ 66 short um_ubanum; /* the uba it is on */ 67 short um_alive; /* controller exists */ 68 int (**um_intr)(); /* interrupt handler(s) */ 69 caddr_t um_addr; /* address of device in i/o space */ 70 struct uba_hd *um_hd; 71 /* the driver saves the prototype command here for use in its go routine */ 72 int um_cmd; /* communication to dgo() */ 73 int um_ubinfo; /* save unibus registers, etc */ 74 struct buf um_tab; /* queue of devices for this controller */ 75 }; 76 77 /* 78 * Per ``device'' structure. 79 * (A controller has devices or uses and releases buffered data paths). 80 * (Everything else is a ``device''.) 81 * 82 * If a controller has many drives attached, then there will 83 * be several uba_device structures associated with a single uba_ctlr 84 * structure. 85 * 86 * This structure contains all the information necessary to run 87 * a unibus device such as a dz or a dh. It also contains information 88 * for slaves of unibus controllers as to which device on the slave 89 * this is. A flags field here can also be given in the system specification 90 * and is used to tell which dz lines are hard wired or other device 91 * specific parameters. 92 */ 93 struct uba_device { 94 struct uba_driver *ui_driver; 95 short ui_unit; /* unit number on the system */ 96 short ui_ctlr; /* mass ctlr number; -1 if none */ 97 short ui_ubanum; /* the uba it is on */ 98 short ui_slave; /* slave on controller */ 99 int (**ui_intr)(); /* interrupt handler(s) */ 100 caddr_t ui_addr; /* address of device in i/o space */ 101 short ui_dk; /* if init 1 set to number for iostat */ 102 short ui_flags; /* parameter from system specification */ 103 short ui_alive; /* device exists */ 104 short ui_type; /* driver specific type information */ 105 caddr_t ui_physaddr; /* phys addr, for standalone (dump) code */ 106 /* this is the forward link in a list of devices on a controller */ 107 struct uba_device *ui_forw; 108 /* if the device is connected to a controller, this is the controller */ 109 struct uba_ctlr *ui_mi; 110 struct uba_hd *ui_hd; 111 }; 112 #endif 113 114 /* 115 * Per-driver structure. 116 * 117 * Each unibus driver defines entries for a set of routines 118 * as well as an array of types which are acceptable to it. 119 * These are used at boot time by the configuration program. 120 */ 121 struct uba_driver { 122 int (*ud_probe)(); /* see if a driver is really there */ 123 int (*ud_slave)(); /* see if a slave is there */ 124 int (*ud_attach)(); /* setup driver for a slave */ 125 int (*ud_dgo)(); /* fill csr/ba to start transfer */ 126 u_short *ud_addr; /* device csr addresses */ 127 char *ud_dname; /* name of a device */ 128 struct uba_device **ud_dinfo; /* backpointers to ubdinit structs */ 129 char *ud_mname; /* name of a controller */ 130 struct uba_ctlr **ud_minfo; /* backpointers to ubminit structs */ 131 short ud_xclu; /* want exclusive use of bdp's */ 132 }; 133 #endif 134 135 /* 136 * Flags to UBA map/bdp allocation routines 137 */ 138 #define UBA_NEEDBDP 1 /* transfer needs a bdp */ 139 #define UBA_CANTWAIT 2 /* don't block me */ 140 #define UBA_NEED16 3 /* need 16 bit addresses only */ 141 142 #ifndef LOCORE 143 #ifdef KERNEL 144 /* 145 * UBA related kernel variables 146 */ 147 int numuba; /* number of uba's */ 148 extern struct uba_hd uba_hd[]; 149 150 /* 151 * Ubminit and ubdinit initialize the mass storage controller and 152 * device tables specifying possible devices. 153 */ 154 extern struct uba_ctlr ubminit[]; 155 extern struct uba_device ubdinit[]; 156 157 /* 158 * UNIbus device address space is mapped by UMEMmap 159 * into virtual address umem[][]. 160 */ 161 extern struct pte UMEMmap[][16]; /* uba device addr pte's */ 162 extern char umem[][16*NBPG]; /* uba device addr space */ 163 164 /* 165 * Since some VAXen vector their first (and only) unibus interrupt 166 * vector just adjacent to the system control block, we must 167 * allocate space there when running on ``any'' cpu. This space is 168 * used for the vector for uba0 on all cpu's. 169 */ 170 extern int (*UNIvec[])(); /* unibus vec for uba0 */ 171 172 #if VAX780 173 /* 174 * On 780's, we must set the scb vectors for the nexus of the 175 * UNIbus adaptors to vector to locore unibus adaptor interrupt dispatchers 176 * which make 780's look like the other VAXen. 177 */ 178 extern Xua0int(), Xua1int(), Xua2int(), Xua3int(); 179 #endif VAX780 180 #endif KERNEL 181 #endif !LOCORE 182