1 /* 2 * Copyright (c) 1982, 1986 Regents of the University of California. 3 * All rights reserved. The Berkeley software License Agreement 4 * specifies the terms and conditions for redistribution. 5 * 6 * @(#)ubavar.h 7.4 (Berkeley) 05/14/88 7 */ 8 9 /* 10 * This file contains definitions related to the kernel structures 11 * for dealing with the unibus adapters. 12 * 13 * Each uba has a uba_hd structure. 14 * Each unibus controller which is not a device has a uba_ctlr structure. 15 * Each unibus device has a uba_device structure. 16 */ 17 18 #ifndef LOCORE 19 /* 20 * Per-uba structure. 21 * 22 * This structure holds the interrupt vector for the uba, 23 * and its address in physical and virtual space. At boot time 24 * we determine the devices attached to the uba's and their 25 * interrupt vectors, filling in uh_vec. We free the map 26 * register and bdp resources of the uba into the structures 27 * defined here. 28 * 29 * During normal operation, resources are allocated and returned 30 * to the structures here. We watch the number of passive releases 31 * on each uba, and if the number is excessive may reset the uba. 32 * 33 * When uba resources are needed and not available, or if a device 34 * which can tolerate no other uba activity (rk07) gets on the bus, 35 * then device drivers may have to wait to get to the bus and are 36 * queued here. It is also possible for processes to block in 37 * the unibus driver in resource wait (mrwant, bdpwant); these 38 * wait states are also recorded here. 39 */ 40 struct uba_hd { 41 int uh_type; /* type of adaptor */ 42 struct uba_regs *uh_uba; /* virt addr of uba adaptor regs */ 43 struct uba_regs *uh_physuba; /* phys addr of uba adaptor regs */ 44 struct pte *uh_mr; /* start of page map */ 45 int uh_memsize; /* size of uba memory, pages */ 46 caddr_t uh_mem; /* start of uba memory address space */ 47 caddr_t uh_iopage; /* start of uba io page */ 48 int (**uh_vec)(); /* interrupt vector */ 49 struct uba_device *uh_actf; /* head of queue to transfer */ 50 struct uba_device *uh_actl; /* tail of queue to transfer */ 51 short uh_mrwant; /* someone is waiting for map reg */ 52 short uh_bdpwant; /* someone awaits bdp's */ 53 int uh_bdpfree; /* free bdp's */ 54 int uh_hangcnt; /* number of ticks hung */ 55 int uh_zvcnt; /* number of recent 0 vectors */ 56 long uh_zvtime; /* time over which zvcnt accumulated */ 57 int uh_zvtotal; /* total number of 0 vectors */ 58 int uh_errcnt; /* number of errors */ 59 int uh_lastiv; /* last free interrupt vector */ 60 short uh_users; /* transient bdp use count */ 61 short uh_xclu; /* an rk07 is using this uba! */ 62 int uh_lastmem; /* limit of any unibus memory */ 63 #define UAMSIZ 100 64 struct map *uh_map; /* buffered data path regs free */ 65 }; 66 67 /* given a pointer to uba_regs, find DWBUA registers */ 68 /* this should be replaced with a union in uba_hd */ 69 #define BUA(uba) ((struct dwbua_regs *)(uba)) 70 71 /* 72 * Per-controller structure. 73 * (E.g. one for each disk and tape controller, and other things 74 * which use and release buffered data paths.) 75 * 76 * If a controller has devices attached, then there are 77 * cross-referenced uba_drive structures. 78 * This structure is the one which is queued in unibus resource wait, 79 * and saves the information about unibus resources which are used. 80 * The queue of devices waiting to transfer is also attached here. 81 */ 82 struct uba_ctlr { 83 struct uba_driver *um_driver; 84 short um_ctlr; /* controller index in driver */ 85 short um_ubanum; /* the uba it is on */ 86 short um_alive; /* controller exists */ 87 int (**um_intr)(); /* interrupt handler(s) */ 88 caddr_t um_addr; /* address of device in i/o space */ 89 struct uba_hd *um_hd; 90 /* the driver saves the prototype command here for use in its go routine */ 91 int um_cmd; /* communication to dgo() */ 92 int um_ubinfo; /* save unibus registers, etc */ 93 int um_bdp; /* for controllers that hang on to bdp's */ 94 struct buf um_tab; /* queue of devices for this controller */ 95 }; 96 97 /* 98 * Per ``device'' structure. 99 * (A controller has devices or uses and releases buffered data paths). 100 * (Everything else is a ``device''.) 101 * 102 * If a controller has many drives attached, then there will 103 * be several uba_device structures associated with a single uba_ctlr 104 * structure. 105 * 106 * This structure contains all the information necessary to run 107 * a unibus device such as a dz or a dh. It also contains information 108 * for slaves of unibus controllers as to which device on the slave 109 * this is. A flags field here can also be given in the system specification 110 * and is used to tell which dz lines are hard wired or other device 111 * specific parameters. 112 */ 113 struct uba_device { 114 struct uba_driver *ui_driver; 115 short ui_unit; /* unit number on the system */ 116 short ui_ctlr; /* mass ctlr number; -1 if none */ 117 short ui_ubanum; /* the uba it is on */ 118 short ui_slave; /* slave on controller */ 119 int (**ui_intr)(); /* interrupt handler(s) */ 120 caddr_t ui_addr; /* address of device in i/o space */ 121 short ui_dk; /* if init 1 set to number for iostat */ 122 int ui_flags; /* parameter from system specification */ 123 short ui_alive; /* device exists */ 124 short ui_type; /* driver specific type information */ 125 caddr_t ui_physaddr; /* phys addr, for standalone (dump) code */ 126 /* this is the forward link in a list of devices on a controller */ 127 struct uba_device *ui_forw; 128 /* if the device is connected to a controller, this is the controller */ 129 struct uba_ctlr *ui_mi; 130 struct uba_hd *ui_hd; 131 }; 132 133 /* 134 * Per-driver structure. 135 * 136 * Each unibus driver defines entries for a set of routines 137 * as well as an array of types which are acceptable to it. 138 * These are used at boot time by the configuration program. 139 */ 140 struct uba_driver { 141 int (*ud_probe)(); /* see if a driver is really there */ 142 int (*ud_slave)(); /* see if a slave is there */ 143 int (*ud_attach)(); /* setup driver for a slave */ 144 int (*ud_dgo)(); /* fill csr/ba to start transfer */ 145 u_short *ud_addr; /* device csr addresses */ 146 char *ud_dname; /* name of a device */ 147 struct uba_device **ud_dinfo; /* backpointers to ubdinit structs */ 148 char *ud_mname; /* name of a controller */ 149 struct uba_ctlr **ud_minfo; /* backpointers to ubminit structs */ 150 short ud_xclu; /* want exclusive use of bdp's */ 151 short ud_keepbdp; /* hang on to bdp's once allocated */ 152 int (*ud_ubamem)(); /* see if dedicated memory is present */ 153 }; 154 #endif 155 156 /* 157 * Flags to UBA map/bdp allocation routines 158 */ 159 #define UBA_NEEDBDP 0x01 /* transfer needs a bdp */ 160 #define UBA_CANTWAIT 0x02 /* don't block me */ 161 #define UBA_NEED16 0x04 /* need 16 bit addresses only */ 162 #define UBA_HAVEBDP 0x08 /* use bdp specified in high bits */ 163 164 /* 165 * Macros to bust return word from map allocation routines. 166 */ 167 #define UBAI_BDP(i) ((int)(((unsigned)(i))>>28)) 168 #define UBAI_NMR(i) ((int)((i)>>18)&0x3ff) 169 #define UBAI_MR(i) ((int)((i)>>9)&0x1ff) 170 #define UBAI_BOFF(i) ((int)((i)&0x1ff)) 171 #define UBAI_ADDR(i) ((int)((i)&0x3ffff)) /* uba addr (boff+mr) */ 172 173 #ifndef LOCORE 174 #ifdef KERNEL 175 #define ubago(ui) ubaqueue(ui, 0) 176 177 /* 178 * UBA related kernel variables 179 */ 180 int numuba; /* number of uba's */ 181 struct uba_hd uba_hd[]; 182 183 /* 184 * Ubminit and ubdinit initialize the mass storage controller and 185 * device tables specifying possible devices. 186 */ 187 extern struct uba_ctlr ubminit[]; 188 extern struct uba_device ubdinit[]; 189 190 /* 191 * UNIBUS device address space is mapped by UMEMmap 192 * into virtual address umem[][]. 193 * The IO page is mapped to the last 8K of each. 194 * This should be enlarged for the Q22 bus. 195 */ 196 extern struct pte UMEMmap[][512]; /* uba device addr pte's */ 197 extern char umem[][512*NBPG]; /* uba device addr space */ 198 199 /* 200 * Since some VAXen vector their unibus interrupts 201 * just adjacent to the system control block, we must 202 * allocate space there when running on ``any'' cpu. This space is 203 * used for the vectors for all ubas. 204 */ 205 extern int (*UNIvec[][128])(); /* unibus vec for ubas */ 206 extern int (*eUNIvec)(); /* end of unibus vec */ 207 208 #if defined(VAX780) || defined(VAX8600) 209 /* 210 * On DW780's, we must set the scb vectors for the nexus of the 211 * UNIbus adaptors to vector to locore unibus adaptor interrupt dispatchers 212 * which make 780's look like the other VAXen. 213 */ 214 extern Xua0int(), Xua1int(), Xua2int(), Xua3int(); 215 #endif VAX780 216 #endif KERNEL 217 #endif !LOCORE 218