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1.1 root 1: /*
2: * Copyright (c) 1982, 1986 Regents of the University of California.
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * 3. All advertising materials mentioning features or use of this software
14: * must display the following acknowledgement:
15: * This product includes software developed by the University of
16: * California, Berkeley and its contributors.
17: * 4. Neither the name of the University nor the names of its contributors
18: * may be used to endorse or promote products derived from this software
19: * without specific prior written permission.
20: *
21: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31: * SUCH DAMAGE.
32: *
33: * @(#)ubavar.h 7.7 (Berkeley) 6/28/90
34: */
35:
36: /*
37: * This file contains definitions related to the kernel structures
38: * for dealing with the unibus adapters.
39: *
40: * Each uba has a uba_hd structure.
41: * Each unibus controller which is not a device has a uba_ctlr structure.
42: * Each unibus device has a uba_device structure.
43: */
44:
45: #ifndef LOCORE
46: /*
47: * Per-uba structure.
48: *
49: * This structure holds the interrupt vector for the uba,
50: * and its address in physical and virtual space. At boot time
51: * we determine the devices attached to the uba's and their
52: * interrupt vectors, filling in uh_vec. We free the map
53: * register and bdp resources of the uba into the structures
54: * defined here.
55: *
56: * During normal operation, resources are allocated and returned
57: * to the structures here. We watch the number of passive releases
58: * on each uba, and if the number is excessive may reset the uba.
59: *
60: * When uba resources are needed and not available, or if a device
61: * which can tolerate no other uba activity (rk07) gets on the bus,
62: * then device drivers may have to wait to get to the bus and are
63: * queued here. It is also possible for processes to block in
64: * the unibus driver in resource wait (mrwant, bdpwant); these
65: * wait states are also recorded here.
66: */
67: struct uba_hd {
68: int uh_type; /* type of adaptor */
69: struct uba_regs *uh_uba; /* virt addr of uba adaptor regs */
70: struct uba_regs *uh_physuba; /* phys addr of uba adaptor regs */
71: struct pte *uh_mr; /* start of page map */
72: int uh_memsize; /* size of uba memory, pages */
73: caddr_t uh_mem; /* start of uba memory address space */
74: caddr_t uh_iopage; /* start of uba io page */
75: int (**uh_vec)(); /* interrupt vector */
76: struct uba_device *uh_actf; /* head of queue to transfer */
77: struct uba_device *uh_actl; /* tail of queue to transfer */
78: short uh_mrwant; /* someone is waiting for map reg */
79: short uh_bdpwant; /* someone awaits bdp's */
80: int uh_bdpfree; /* free bdp's */
81: int uh_hangcnt; /* number of ticks hung */
82: int uh_zvcnt; /* number of recent 0 vectors */
83: long uh_zvtime; /* time over which zvcnt accumulated */
84: int uh_zvtotal; /* total number of 0 vectors */
85: int uh_errcnt; /* number of errors */
86: int uh_lastiv; /* last free interrupt vector */
87: short uh_users; /* transient bdp use count */
88: short uh_xclu; /* an rk07 is using this uba! */
89: int uh_lastmem; /* limit of any unibus memory */
90: #define UAMSIZ 100
91: struct map *uh_map; /* register free map */
92: };
93:
94: /* given a pointer to uba_regs, find DWBUA registers */
95: /* this should be replaced with a union in uba_hd */
96: #define BUA(uba) ((struct dwbua_regs *)(uba))
97:
98: /*
99: * Per-controller structure.
100: * (E.g. one for each disk and tape controller, and other things
101: * which use and release buffered data paths.)
102: *
103: * If a controller has devices attached, then there are
104: * cross-referenced uba_drive structures.
105: * This structure is the one which is queued in unibus resource wait,
106: * and saves the information about unibus resources which are used.
107: * The queue of devices waiting to transfer is also attached here.
108: */
109: struct uba_ctlr {
110: struct uba_driver *um_driver;
111: short um_ctlr; /* controller index in driver */
112: short um_ubanum; /* the uba it is on */
113: short um_alive; /* controller exists */
114: int (**um_intr)(); /* interrupt handler(s) */
115: caddr_t um_addr; /* address of device in i/o space */
116: struct uba_hd *um_hd;
117: /* the driver saves the prototype command here for use in its go routine */
118: int um_cmd; /* communication to dgo() */
119: int um_ubinfo; /* save unibus registers, etc */
120: int um_bdp; /* for controllers that hang on to bdp's */
121: struct buf um_tab; /* queue of devices for this controller */
122: };
123:
124: /*
125: * Per ``device'' structure.
126: * (A controller has devices or uses and releases buffered data paths).
127: * (Everything else is a ``device''.)
128: *
129: * If a controller has many drives attached, then there will
130: * be several uba_device structures associated with a single uba_ctlr
131: * structure.
132: *
133: * This structure contains all the information necessary to run
134: * a unibus device such as a dz or a dh. It also contains information
135: * for slaves of unibus controllers as to which device on the slave
136: * this is. A flags field here can also be given in the system specification
137: * and is used to tell which dz lines are hard wired or other device
138: * specific parameters.
139: */
140: struct uba_device {
141: struct uba_driver *ui_driver;
142: short ui_unit; /* unit number on the system */
143: short ui_ctlr; /* mass ctlr number; -1 if none */
144: short ui_ubanum; /* the uba it is on */
145: short ui_slave; /* slave on controller */
146: int (**ui_intr)(); /* interrupt handler(s) */
147: caddr_t ui_addr; /* address of device in i/o space */
148: short ui_dk; /* if init 1 set to number for iostat */
149: int ui_flags; /* parameter from system specification */
150: short ui_alive; /* device exists */
151: short ui_type; /* driver specific type information */
152: caddr_t ui_physaddr; /* phys addr, for standalone (dump) code */
153: /* this is the forward link in a list of devices on a controller */
154: struct uba_device *ui_forw;
155: /* if the device is connected to a controller, this is the controller */
156: struct uba_ctlr *ui_mi;
157: struct uba_hd *ui_hd;
158: };
159:
160: /*
161: * Per-driver structure.
162: *
163: * Each unibus driver defines entries for a set of routines
164: * as well as an array of types which are acceptable to it.
165: * These are used at boot time by the configuration program.
166: */
167: struct uba_driver {
168: int (*ud_probe)(); /* see if a driver is really there */
169: int (*ud_slave)(); /* see if a slave is there */
170: int (*ud_attach)(); /* setup driver for a slave */
171: int (*ud_dgo)(); /* fill csr/ba to start transfer */
172: u_short *ud_addr; /* device csr addresses */
173: char *ud_dname; /* name of a device */
174: struct uba_device **ud_dinfo; /* backpointers to ubdinit structs */
175: char *ud_mname; /* name of a controller */
176: struct uba_ctlr **ud_minfo; /* backpointers to ubminit structs */
177: short ud_xclu; /* want exclusive use of bdp's */
178: short ud_keepbdp; /* hang on to bdp's once allocated */
179: int (*ud_ubamem)(); /* see if dedicated memory is present */
180: };
181: #endif
182:
183: /*
184: * Flags to UBA map/bdp allocation routines
185: */
186: #define UBA_NEEDBDP 0x01 /* transfer needs a bdp */
187: #define UBA_CANTWAIT 0x02 /* don't block me */
188: #define UBA_NEED16 0x04 /* need 16 bit addresses only */
189: #define UBA_HAVEBDP 0x08 /* use bdp specified in high bits */
190:
191: /*
192: * Macros to bust return word from map allocation routines.
193: * SHOULD USE STRUCTURE TO STORE UBA RESOURCE ALLOCATION:
194: */
195: #ifdef notyet
196: struct ubinfo {
197: long ub_addr; /* unibus address: mr + boff */
198: int ub_nmr; /* number of registers, 0 if empty */
199: int ub_bdp; /* bdp number, 0 if none */
200: };
201: #define UBAI_MR(i) (((i) >> 9) & 0x7ff) /* starting map register */
202: #define UBAI_BOFF(i) ((i)&0x1ff) /* page offset */
203: #else
204: #define UBAI_BDP(i) ((int)(((unsigned)(i)) >> 28))
205: #define BDPMASK 0xf0000000
206: #define UBAI_NMR(i) ((int)((i) >> 20) & 0xff) /* max 255 (=127.5K) */
207: #define UBA_MAXNMR 255
208: #define UBAI_MR(i) ((int)((i) >> 9) & 0x7ff) /* max 2047 */
209: #define UBA_MAXMR 2047
210: #define UBAI_BOFF(i) ((int)((i) & 0x1ff))
211: #define UBAI_ADDR(i) ((int)((i) & 0xfffff)) /* uba addr (boff+mr) */
212: #define UBAI_INFO(off, mr, nmr, bdp) \
213: (((bdp) << 28) | ((nmr) << 20) | ((mr) << 9) | (off))
214: #endif
215:
216: #ifndef LOCORE
217: #ifdef KERNEL
218: #define ubago(ui) ubaqueue(ui, 0)
219:
220: /*
221: * UBA related kernel variables
222: */
223: int numuba; /* number of uba's */
224: struct uba_hd uba_hd[];
225:
226: /*
227: * Ubminit and ubdinit initialize the mass storage controller and
228: * device tables specifying possible devices.
229: */
230: extern struct uba_ctlr ubminit[];
231: extern struct uba_device ubdinit[];
232:
233: /*
234: * UNIBUS device address space is mapped by UMEMmap
235: * into virtual address umem[][].
236: * The IO page is mapped to the last 8K of each.
237: * This should be enlarged for the Q22 bus.
238: */
239: extern struct pte UMEMmap[][512]; /* uba device addr pte's */
240: extern char umem[][512*NBPG]; /* uba device addr space */
241:
242: /*
243: * Since some VAXen vector their unibus interrupts
244: * just adjacent to the system control block, we must
245: * allocate space there when running on ``any'' cpu. This space is
246: * used for the vectors for all ubas.
247: */
248: extern int (*UNIvec[][128])(); /* unibus vec for ubas */
249: extern int (*eUNIvec)(); /* end of unibus vec */
250:
251: #if defined(VAX780) || defined(VAX8600)
252: /*
253: * On DW780's, we must set the scb vectors for the nexus of the
254: * UNIbus adaptors to vector to locore unibus adaptor interrupt dispatchers
255: * which make 780's look like the other VAXen.
256: */
257: extern Xua0int(), Xua1int(), Xua2int(), Xua3int();
258: #endif VAX780
259: #endif KERNEL
260: #endif !LOCORE
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