1 /* $NetBSD: fhc.c,v 1.11 2022/01/22 11:49:17 thorpej Exp $ */
2 /* $OpenBSD: fhc.c,v 1.17 2010/11/11 17:58:23 miod Exp $ */
3
4 /*
5 * Copyright (c) 2004 Jason L. Wright (jason@thought.net)
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
21 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
25 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
26 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include <sys/cdefs.h>
31 __KERNEL_RCSID(0, "$NetBSD: fhc.c,v 1.11 2022/01/22 11:49:17 thorpej Exp $");
32
33 #include <sys/types.h>
34 #include <sys/param.h>
35 #include <sys/systm.h>
36 #include <sys/kernel.h>
37 #include <sys/device.h>
38 #include <sys/conf.h>
39 #include <sys/malloc.h>
40 #include <sys/kmem.h>
41 #include <sys/bus.h>
42
43 #include <machine/autoconf.h>
44 #include <machine/openfirm.h>
45
46 #include <sparc64/dev/fhcreg.h>
47 #include <sparc64/dev/fhcvar.h>
48 #include <sparc64/dev/iommureg.h>
49
50 int fhc_print(void *, const char *);
51
52 bus_space_tag_t fhc_alloc_bus_tag(struct fhc_softc *);
53 int _fhc_bus_map(bus_space_tag_t, bus_addr_t, bus_size_t, int, vaddr_t,
54 bus_space_handle_t *);
55 void *fhc_intr_establish(bus_space_tag_t, int, int,
56 int (*)(void *), void *, void (*)(void));
57 bus_space_handle_t *fhc_find_intr_handle(struct fhc_softc *, int);
58
59 void
fhc_attach(struct fhc_softc * sc)60 fhc_attach(struct fhc_softc *sc)
61 {
62 int node0, node;
63 u_int32_t ctrl;
64
65 printf(" board %d: %s\n", sc->sc_board,
66 prom_getpropstring(sc->sc_node, "board-model"));
67
68 sc->sc_cbt = fhc_alloc_bus_tag(sc);
69
70 sc->sc_ign = sc->sc_board << 1;
71 bus_space_write_4(sc->sc_bt, sc->sc_ireg, FHC_I_IGN, sc->sc_ign);
72 sc->sc_ign = bus_space_read_4(sc->sc_bt, sc->sc_ireg, FHC_I_IGN);
73
74 ctrl = bus_space_read_4(sc->sc_bt, sc->sc_preg, FHC_P_CTRL);
75 if (!sc->sc_is_central)
76 ctrl |= FHC_P_CTRL_IXIST;
77 ctrl &= ~(FHC_P_CTRL_AOFF | FHC_P_CTRL_BOFF | FHC_P_CTRL_SLINE);
78 bus_space_write_4(sc->sc_bt, sc->sc_preg, FHC_P_CTRL, ctrl);
79 bus_space_read_4(sc->sc_bt, sc->sc_preg, FHC_P_CTRL);
80
81 /* clear interrupts */
82 bus_space_write_4(sc->sc_bt, sc->sc_freg, FHC_F_ICLR, 0);
83 bus_space_read_4(sc->sc_bt, sc->sc_freg, FHC_F_ICLR);
84 bus_space_write_4(sc->sc_bt, sc->sc_sreg, FHC_S_ICLR, 0);
85 bus_space_read_4(sc->sc_bt, sc->sc_sreg, FHC_S_ICLR);
86 bus_space_write_4(sc->sc_bt, sc->sc_ureg, FHC_U_ICLR, 0);
87 bus_space_read_4(sc->sc_bt, sc->sc_ureg, FHC_U_ICLR);
88 bus_space_write_4(sc->sc_bt, sc->sc_treg, FHC_T_ICLR, 0);
89 bus_space_read_4(sc->sc_bt, sc->sc_treg, FHC_T_ICLR);
90
91 prom_getprop(sc->sc_node, "ranges", sizeof(struct fhc_range),
92 &sc->sc_nrange, (void **)&sc->sc_range);
93
94 devhandle_t selfh = device_handle(sc->sc_dev);
95 node0 = firstchild(sc->sc_node);
96 for (node = node0; node; node = nextsibling(node)) {
97 struct fhc_attach_args fa;
98
99 #if 0
100 if (!checkstatus(node))
101 continue;
102 #endif
103
104 bzero(&fa, sizeof(fa));
105
106 fa.fa_node = node;
107 fa.fa_bustag = sc->sc_cbt;
108
109 if (fhc_get_string(fa.fa_node, "name", &fa.fa_name)) {
110 printf("can't fetch name for node 0x%x\n", node);
111 continue;
112 }
113 prom_getprop(node, "reg", sizeof(struct fhc_reg),
114 &fa.fa_nreg, (void **)&fa.fa_reg);
115 prom_getprop(node, "interrupts", sizeof(int),
116 &fa.fa_nintr, (void **)&fa.fa_intr);
117 prom_getprop(node, "address", sizeof(*fa.fa_promvaddrs),
118 &fa.fa_npromvaddrs, (void **)&fa.fa_promvaddrs);
119
120 (void)config_found(sc->sc_dev, (void *)&fa, fhc_print,
121 CFARGS(.devhandle = prom_node_to_devhandle(selfh, node)));
122
123 if (fa.fa_name != NULL)
124 free(fa.fa_name, M_DEVBUF);
125 if (fa.fa_reg != NULL)
126 free(fa.fa_reg, M_DEVBUF);
127 if (fa.fa_intr != NULL)
128 free(fa.fa_intr, M_DEVBUF);
129 if (fa.fa_promvaddrs != NULL)
130 free(fa.fa_promvaddrs, M_DEVBUF);
131 }
132 }
133
134 int
fhc_print(void * args,const char * busname)135 fhc_print(void *args, const char *busname)
136 {
137 struct fhc_attach_args *fa = args;
138 char *class;
139
140 if (busname != NULL) {
141 printf("\"%s\" at %s", fa->fa_name, busname);
142 class = prom_getpropstring(fa->fa_node, "device_type");
143 if (*class != '\0')
144 printf(" class %s", class);
145 }
146 return (UNCONF);
147 }
148
149 int
fhc_get_string(int node,const char * name,char ** buf)150 fhc_get_string(int node, const char *name, char **buf)
151 {
152 int len;
153
154 len = prom_getproplen(node, name);
155 if (len < 0)
156 return (len);
157 *buf = (char *)malloc(len + 1, M_DEVBUF, M_WAITOK);
158 if (len != 0)
159 prom_getpropstringA(node, name, *buf, len + 1);
160 (*buf)[len] = '\0';
161 return (0);
162 }
163
164 bus_space_tag_t
fhc_alloc_bus_tag(struct fhc_softc * sc)165 fhc_alloc_bus_tag(struct fhc_softc *sc)
166 {
167 struct sparc_bus_space_tag *bt;
168
169 bt = kmem_zalloc(sizeof(*bt), KM_SLEEP);
170 bt->cookie = sc;
171 bt->parent = sc->sc_bt;
172 bt->type = 0; /* XXX asi? */
173 bt->sparc_bus_map = _fhc_bus_map;
174 /* XXX bt->sparc_bus_mmap = fhc_bus_mmap; */
175 bt->sparc_intr_establish = fhc_intr_establish;
176 return (bt);
177 }
178
179 int
_fhc_bus_map(bus_space_tag_t t,bus_addr_t addr,bus_size_t size,int flags,vaddr_t unused,bus_space_handle_t * hp)180 _fhc_bus_map(bus_space_tag_t t, bus_addr_t addr, bus_size_t size,
181 int flags, vaddr_t unused, bus_space_handle_t *hp)
182 {
183 struct fhc_softc *sc = t->cookie;
184 int64_t slot = BUS_ADDR_IOSPACE(addr);
185 int64_t offset = BUS_ADDR_PADDR(addr);
186 int i;
187
188 if (t->parent == NULL || t->parent->sparc_bus_map == NULL) {
189 printf("\n_fhc_bus_map: invalid parent");
190 return (EINVAL);
191 }
192
193 for (i = 0; i < sc->sc_nrange; i++) {
194 bus_addr_t paddr;
195
196 if (sc->sc_range[i].cspace != slot)
197 continue;
198
199 paddr = offset - sc->sc_range[i].coffset;
200 paddr += sc->sc_range[i].poffset;
201 paddr |= ((bus_addr_t)sc->sc_range[i].pspace << 32);
202
203 return bus_space_map(t->parent, paddr, size, flags, hp);
204 }
205
206 return (EINVAL);
207 }
208
209 bus_space_handle_t *
fhc_find_intr_handle(struct fhc_softc * sc,int ino)210 fhc_find_intr_handle(struct fhc_softc *sc, int ino)
211 {
212 switch (FHC_INO(ino)) {
213 case FHC_F_INO:
214 return &sc->sc_freg;
215 case FHC_S_INO:
216 return &sc->sc_sreg;
217 case FHC_U_INO:
218 return &sc->sc_ureg;
219 case FHC_T_INO:
220 return &sc->sc_treg;
221 default:
222 break;
223 }
224
225 return (NULL);
226 }
227
228 void *
fhc_intr_establish(bus_space_tag_t t,int ihandle,int level,int (* handler)(void *),void * arg,void (* fastvec)(void))229 fhc_intr_establish(bus_space_tag_t t, int ihandle, int level,
230 int (*handler)(void *), void *arg, void (*fastvec)(void) /* ignored */)
231 {
232 struct fhc_softc *sc = t->cookie;
233 volatile u_int64_t *intrmapptr = NULL, *intrclrptr = NULL;
234 struct intrhand *ih;
235 long vec;
236 bus_space_handle_t *hp;
237 struct fhc_intr_reg *intrregs;
238
239 hp = fhc_find_intr_handle(sc, ihandle);
240 if (hp == NULL) {
241 printf(": can't find intr handle\n");
242 return (NULL);
243 }
244
245 intrregs = bus_space_vaddr(sc->sc_bt, *hp);
246 intrmapptr = &intrregs->imap;
247 intrclrptr = &intrregs->iclr;
248 vec = ((sc->sc_ign << INTMAP_IGN_SHIFT) & INTMAP_IGN) |
249 INTINO(ihandle);
250
251 ih = intrhand_alloc();
252
253 ih->ih_ivec = ihandle;
254
255 /* Register the map and clear intr registers */
256 ih->ih_map = intrmapptr;
257 ih->ih_clr = intrclrptr;
258
259 ih->ih_fun = handler;
260 ih->ih_arg = arg;
261 ih->ih_pil = level;
262 ih->ih_number = vec;
263
264 intr_establish(ih->ih_pil, level != IPL_VM, ih);
265
266 /*
267 * XXXX --- we really should use bus_space for this.
268 */
269 if (intrmapptr != NULL) {
270 u_int64_t r;
271
272 r = *intrmapptr;
273 r |= INTMAP_V | (CPU_UPAID << INTMAP_TID_SHIFT);
274 *intrmapptr = r;
275 r = *intrmapptr;
276 ih->ih_number |= r & INTMAP_INR;
277 }
278
279 return (ih);
280 }
281