1 /* $NetBSD: plb.c,v 1.25 2023/12/20 15:29:06 thorpej Exp $ */
2
3 /*
4 * Copyright 2001 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
23 * written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
36 */
37
38 /*
39 * Copyright (c) 1996 Christopher G. Demetriou. All rights reserved.
40 *
41 * Redistribution and use in source and binary forms, with or without
42 * modification, are permitted provided that the following conditions
43 * are met:
44 * 1. Redistributions of source code must retain the above copyright
45 * notice, this list of conditions and the following disclaimer.
46 * 2. Redistributions in binary form must reproduce the above copyright
47 * notice, this list of conditions and the following disclaimer in the
48 * documentation and/or other materials provided with the distribution.
49 * 3. All advertising materials mentioning features or use of this software
50 * must display the following acknowledgement:
51 * This product includes software developed by Christopher G. Demetriou
52 * for the NetBSD Project.
53 * 4. The name of the author may not be used to endorse or promote products
54 * derived from this software without specific prior written permission
55 *
56 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
57 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
58 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
59 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
60 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
61 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
62 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
63 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
64 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
65 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
66 */
67
68 #include <sys/cdefs.h>
69 __KERNEL_RCSID(0, "$NetBSD: plb.c,v 1.25 2023/12/20 15:29:06 thorpej Exp $");
70
71 #include "emac.h"
72 #include "locators.h"
73
74 #define _POWERPC_BUS_DMA_PRIVATE
75
76 #include <sys/param.h>
77 #include <sys/systm.h>
78 #include <sys/device.h>
79 #include <sys/extent.h>
80 #include <sys/bus.h>
81 #include <sys/cpu.h>
82
83 #include <powerpc/ibm4xx/cpu.h>
84 #include <powerpc/ibm4xx/spr.h>
85 #include <powerpc/ibm4xx/dev/malvar.h>
86 #include <powerpc/ibm4xx/dev/plbvar.h>
87
88 /*
89 * The devices that attach to the processor local bus on the 405GP CPU.
90 */
91 const struct plb_dev plb_devs [] = {
92 /* IBM 405GP */
93 { IBM405GP, "cpu", },
94 { IBM405GP, "ecc", },
95 { IBM405GP, "opb", },
96 { IBM405GP, "pchb", },
97
98 /* IBM 405GPr */
99 { IBM405GPR, "cpu", },
100 { IBM405GPR, "ecc", },
101 { IBM405GPR, "opb", },
102 { IBM405GPR, "pchb", },
103 { IBM405GPR, "exb", },
104
105 /* AMCC 405EX / EXR */
106 { AMCC405EX, "cpu", },
107 { AMCC405EX, "ecc", },
108 { AMCC405EX, "opb", },
109 { AMCC405EX, "dwctwo", },
110
111 { 0, NULL }
112 };
113
114 static int plb_match(device_t, cfdata_t, void *);
115 static void plb_attach(device_t, device_t, void *);
116 static int plb_print(void *, const char *);
117
118 CFATTACH_DECL_NEW(plb, 0, plb_match, plb_attach, NULL, NULL);
119
120 /*
121 * "generic" DMA struct, nothing special.
122 */
123 struct powerpc_bus_dma_tag ibm4xx_default_bus_dma_tag = {
124 0, /* _bounce_thresh */
125 _bus_dmamap_create,
126 _bus_dmamap_destroy,
127 _bus_dmamap_load,
128 _bus_dmamap_load_mbuf,
129 _bus_dmamap_load_uio,
130 _bus_dmamap_load_raw,
131 _bus_dmamap_unload,
132 _bus_dmamap_sync,
133 _bus_dmamem_alloc,
134 _bus_dmamem_free,
135 _bus_dmamem_map,
136 _bus_dmamem_unmap,
137 _bus_dmamem_mmap,
138 _bus_dma_phys_to_bus_mem_generic,
139 _bus_dma_bus_mem_to_phys_generic,
140 };
141
142 /*
143 * Probe for the plb; always succeeds.
144 */
145 static int
plb_match(device_t parent,cfdata_t cf,void * aux)146 plb_match(device_t parent, cfdata_t cf, void *aux)
147 {
148
149 return 1;
150 }
151
152 /*
153 * Attach the processor local bus.
154 */
155 static void
plb_attach(device_t parent,device_t self,void * aux)156 plb_attach(device_t parent, device_t self, void *aux)
157 {
158 struct plb_attach_args paa;
159 struct plb_dev *local_plb_devs = aux;
160 int pvr, i;
161
162 aprint_naive("\n");
163 aprint_normal("\n");
164
165 pvr = mfpvr() >> 16;
166
167 #if NEMAC > 0
168 mal_attach(pvr);
169 #endif
170
171 for (i = 0; plb_devs[i].plb_name != NULL; i++) {
172 if (plb_devs[i].plb_pvr != pvr)
173 continue;
174
175 paa.plb_name = plb_devs[i].plb_name;
176 paa.plb_addr = PLBCF_ADDR_DEFAULT;
177 paa.plb_dmat = &ibm4xx_default_bus_dma_tag;
178 paa.plb_irq = PLBCF_IRQ_DEFAULT;
179
180 config_found(self, &paa, plb_print, CFARGS_NONE);
181 }
182
183 while (local_plb_devs && local_plb_devs->plb_name != NULL) {
184 if (local_plb_devs->plb_pvr != pvr)
185 continue;
186
187 paa.plb_name = local_plb_devs->plb_name;
188 paa.plb_addr = PLBCF_ADDR_DEFAULT;
189 paa.plb_dmat = &ibm4xx_default_bus_dma_tag;
190 paa.plb_irq = PLBCF_IRQ_DEFAULT;
191
192 config_found(self, &paa, plb_print, CFARGS_NONE);
193 local_plb_devs++;
194 }
195 }
196
197 static int
plb_print(void * aux,const char * pnp)198 plb_print(void *aux, const char *pnp)
199 {
200 struct plb_attach_args *paa = aux;
201
202 if (pnp)
203 aprint_normal("%s at %s", paa->plb_name, pnp);
204 if (paa->plb_addr != PLBCF_ADDR_DEFAULT)
205 aprint_normal(" address 0x%08x", paa->plb_addr);
206 if (paa->plb_irq != PLBCF_IRQ_DEFAULT)
207 aprint_normal(" irq %d", paa->plb_irq);
208
209 return UNCONF;
210 }
211