1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21 /*
22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
24 */
25
26 /*
27 * This file contains ddi functions common to intel architectures
28 */
29
30 #include <sys/archsystm.h>
31 #include <sys/types.h>
32 #include <sys/dditypes.h>
33 #include <sys/ddi_impldefs.h>
34 #include <sys/sunddi.h>
35 #include <sys/cpu.h>
36
37 /*
38 * DDI Mapping
39 */
40
41 /*
42 * i_ddi_bus_map:
43 * Generic bus_map entry point, for byte addressable devices
44 * conforming to the reg/range addressing model with no HAT layer
45 * to be programmed at this level.
46 */
47
48 int
i_ddi_bus_map(dev_info_t * dip,dev_info_t * rdip,ddi_map_req_t * mp,off_t offset,off_t len,caddr_t * vaddrp)49 i_ddi_bus_map(dev_info_t *dip, dev_info_t *rdip, ddi_map_req_t *mp,
50 off_t offset, off_t len, caddr_t *vaddrp)
51 {
52 struct regspec tmp_reg, *rp;
53 ddi_map_req_t mr = *mp; /* Get private copy of request */
54 int error;
55
56 mp = &mr;
57
58 /*
59 * First, if given an rnumber, convert it to a regspec...
60 */
61
62 if (mp->map_type == DDI_MT_RNUMBER) {
63
64 int rnumber = mp->map_obj.rnumber;
65 #ifdef DDI_MAP_DEBUG
66 static char *out_of_range =
67 "i_ddi_bus_map: Out of range rnumber <%d>, device <%s>";
68 #endif /* DDI_MAP_DEBUG */
69
70 rp = i_ddi_rnumber_to_regspec(rdip, rnumber);
71 if (rp == (struct regspec *)0) {
72 #ifdef DDI_MAP_DEBUG
73 cmn_err(CE_WARN, out_of_range, rnumber,
74 ddi_get_name(rdip));
75 #endif /* DDI_MAP_DEBUG */
76 return (DDI_ME_RNUMBER_RANGE);
77 }
78
79 /*
80 * Convert the given ddi_map_req_t from rnumber to regspec...
81 */
82
83 mp->map_type = DDI_MT_REGSPEC;
84 mp->map_obj.rp = rp;
85 }
86
87 /*
88 * Adjust offset and length correspnding to called values...
89 * XXX: A non-zero length means override the one in the regspec.
90 * XXX: (Regardless of what's in the parent's range)
91 */
92
93 tmp_reg = *(mp->map_obj.rp); /* Preserve underlying data */
94 rp = mp->map_obj.rp = &tmp_reg; /* Use tmp_reg in request */
95
96 #ifdef DDI_MAP_DEBUG
97 cmn_err(CE_CONT,
98 "i_ddi_bus_map: <%s,%s> <0x%x, 0x%x, 0x%d> "
99 "offset %d len %d handle 0x%x\n",
100 ddi_get_name(dip), ddi_get_name(rdip),
101 rp->regspec_bustype, rp->regspec_addr, rp->regspec_size,
102 offset, len, mp->map_handlep);
103 #endif /* DDI_MAP_DEBUG */
104
105 /*
106 * I/O or memory mapping
107 *
108 * <bustype=0, addr=x, len=x>: memory
109 * <bustype=1, addr=x, len=x>: i/o
110 * <bustype>1, addr=0, len=x>: x86-compatibility i/o
111 */
112
113 if (rp->regspec_bustype > 1 && rp->regspec_addr != 0) {
114 cmn_err(CE_WARN, "<%s,%s>: invalid register spec"
115 " <0x%x, 0x%x, 0x%x>\n", ddi_get_name(dip),
116 ddi_get_name(rdip), rp->regspec_bustype,
117 rp->regspec_addr, rp->regspec_size);
118 return (DDI_ME_INVAL);
119 }
120
121 if (rp->regspec_bustype > 1 && rp->regspec_addr == 0) {
122 /*
123 * compatibility i/o mapping
124 */
125 rp->regspec_bustype += (uint_t)offset;
126 } else {
127 /*
128 * Normal memory or i/o mapping
129 */
130 rp->regspec_addr += (uint_t)offset;
131 }
132
133 if (len != 0)
134 rp->regspec_size = (uint_t)len;
135
136 #ifdef DDI_MAP_DEBUG
137 cmn_err(CE_CONT,
138 " <%s,%s> <0x%x, 0x%x, 0x%d> "
139 "offset %d len %d\n",
140 ddi_get_name(dip), ddi_get_name(rdip),
141 rp->regspec_bustype, rp->regspec_addr, rp->regspec_size,
142 offset, len);
143 #endif /* DDI_MAP_DEBUG */
144
145 /*
146 * If we had an MMU, this is where you'd program the MMU and hat layer.
147 * Since we're using the default function here, we do not have an MMU
148 * to program.
149 */
150
151 /*
152 * Apply any parent ranges at this level, if applicable.
153 * (This is where nexus specific regspec translation takes place.
154 * Use of this function is implicit agreement that translation is
155 * provided via ddi_apply_range.) Note that we assume that
156 * the request is within the parents limits.
157 */
158
159 #ifdef DDI_MAP_DEBUG
160 ddi_map_debug("applying range of parent <%s> to child <%s>...\n",
161 ddi_get_name(dip), ddi_get_name(rdip));
162 #endif /* DDI_MAP_DEBUG */
163
164 if ((error = i_ddi_apply_range(dip, rdip, mp->map_obj.rp)) != 0)
165 return (error);
166
167 /*
168 * Call my parents bus_map function with modified values...
169 */
170
171 return (ddi_map(dip, mp, (off_t)0, (off_t)0, vaddrp));
172 }
173
174 /*
175 * Creating register mappings and handling interrupts:
176 */
177
178 struct regspec *
i_ddi_rnumber_to_regspec(dev_info_t * dip,int rnumber)179 i_ddi_rnumber_to_regspec(dev_info_t *dip, int rnumber)
180 {
181 if (rnumber >= sparc_pd_getnreg(DEVI(dip)))
182 return ((struct regspec *)0);
183
184 return (sparc_pd_getreg(DEVI(dip), rnumber));
185 }
186
187 /*
188 * Static function to determine if a reg prop is enclosed within
189 * a given a range spec. (For readability: only used by i_ddi_aply_range.).
190 */
191 static int
reg_is_enclosed_in_range(struct regspec * rp,struct rangespec * rangep)192 reg_is_enclosed_in_range(struct regspec *rp, struct rangespec *rangep)
193 {
194 if (rp->regspec_bustype != rangep->rng_cbustype)
195 return (0);
196
197 if (rp->regspec_addr < rangep->rng_coffset)
198 return (0);
199
200 if (rangep->rng_size == 0)
201 return (1); /* size is really 2**(bits_per_word) */
202
203 if ((rp->regspec_addr + rp->regspec_size - 1) <=
204 (rangep->rng_coffset + rangep->rng_size - 1))
205 return (1);
206
207 return (0);
208 }
209
210 /*
211 * i_ddi_apply_range:
212 * Apply range of dp to struct regspec *rp, if applicable.
213 * If there's any range defined, it gets applied.
214 */
215
216 int
i_ddi_apply_range(dev_info_t * dp,dev_info_t * rdip,struct regspec * rp)217 i_ddi_apply_range(dev_info_t *dp, dev_info_t *rdip, struct regspec *rp)
218 {
219 int nrange, b;
220 struct rangespec *rangep;
221 static char *out_of_range =
222 "Out of range register specification from device node <%s>\n";
223
224 nrange = sparc_pd_getnrng(dp);
225 if (nrange == 0) {
226 #ifdef DDI_MAP_DEBUG
227 ddi_map_debug(" No range.\n");
228 #endif /* DDI_MAP_DEBUG */
229 return (0);
230 }
231
232 /*
233 * Find a match, making sure the regspec is within the range
234 * of the parent, noting that a size of zero in a range spec
235 * really means a size of 2**(bitsperword).
236 */
237
238 for (b = 0, rangep = sparc_pd_getrng(dp, 0); b < nrange; ++b, ++rangep)
239 if (reg_is_enclosed_in_range(rp, rangep))
240 break; /* found a match */
241
242 if (b == nrange) {
243 cmn_err(CE_WARN, out_of_range, ddi_get_name(rdip));
244 return (DDI_ME_REGSPEC_RANGE);
245 }
246
247 #ifdef DDI_MAP_DEBUG
248 ddi_map_debug(" Input: %x.%x.%x\n", rp->regspec_bustype,
249 rp->regspec_addr, rp->regspec_size);
250 ddi_map_debug(" Range: %x.%x %x.%x %x\n",
251 rangep->rng_cbustype, rangep->rng_coffset,
252 rangep->rng_bustype, rangep->rng_offset, rangep->rng_size);
253 #endif /* DDI_MAP_DEBUG */
254
255 rp->regspec_bustype = rangep->rng_bustype;
256 rp->regspec_addr += rangep->rng_offset - rangep->rng_coffset;
257
258 #ifdef DDI_MAP_DEBUG
259 ddi_map_debug(" Return: %x.%x.%x\n", rp->regspec_bustype,
260 rp->regspec_addr, rp->regspec_size);
261 #endif /* DDI_MAP_DEBUG */
262
263 return (0);
264 }
265
266 /*
267 * i_ddi_map_fault: wrapper for bus_map_fault.
268 */
269 int
i_ddi_map_fault(dev_info_t * dip,dev_info_t * rdip,struct hat * hat,struct seg * seg,caddr_t addr,struct devpage * dp,pfn_t pfn,uint_t prot,uint_t lock)270 i_ddi_map_fault(dev_info_t *dip, dev_info_t *rdip,
271 struct hat *hat, struct seg *seg, caddr_t addr,
272 struct devpage *dp, pfn_t pfn, uint_t prot, uint_t lock)
273 {
274 dev_info_t *pdip;
275
276 if (dip == NULL)
277 return (DDI_FAILURE);
278
279 pdip = (dev_info_t *)DEVI(dip)->devi_bus_map_fault;
280
281 /* request appropriate parent to map fault */
282 return ((*(DEVI(pdip)->devi_ops->devo_bus_ops->bus_map_fault))(pdip,
283 rdip, hat, seg, addr, dp, pfn, prot, lock));
284 }
285
286 /*
287 * Return an integer in native machine format from an OBP 1275 integer
288 * representation, which is big-endian, with no particular alignment
289 * guarantees. intp points to the OBP data, and n the number of bytes.
290 *
291 * Byte-swapping is needed on intel.
292 */
293 int
impl_ddi_prop_int_from_prom(uchar_t * intp,int n)294 impl_ddi_prop_int_from_prom(uchar_t *intp, int n)
295 {
296 int i = 0;
297
298 ASSERT(n > 0 && n <= 4);
299
300 intp += n;
301 while (n-- > 0) {
302 i = (i << 8) | *(--intp);
303 }
304
305 return (i);
306 }
307
308
309 int drv_usec_coarse_timing = 0;
310
311 /*
312 * Time delay function called by drivers
313 */
314 void
drv_usecwait(clock_t count)315 drv_usecwait(clock_t count)
316 {
317 int tens = 0;
318 extern int gethrtime_hires;
319
320 if (gethrtime_hires) {
321 hrtime_t start, end;
322 hrtime_t waittime;
323
324 if (drv_usec_coarse_timing) {
325 /* revert to the wait time as before using tsc */
326 /* in case there are callers depending on the */
327 /* old behaviour */
328 waittime = ((count > 10) ?
329 (((hrtime_t)count / 10) + 1) : 1) *
330 10 * (NANOSEC / MICROSEC);
331 } else {
332 waittime = (hrtime_t)count * (NANOSEC / MICROSEC);
333 }
334 start = end = gethrtime();
335 while ((end - start) < waittime) {
336 SMT_PAUSE();
337 end = gethrtime();
338 }
339 return;
340
341 }
342
343 if (count > 10)
344 tens = count/10;
345 tens++; /* roundup; wait at least 10 microseconds */
346 while (tens > 0) {
347 tenmicrosec();
348 tens--;
349 }
350 }
351