1 /* $NetBSD: machdep.c,v 1.3 2021/09/19 11:37:00 andvar Exp $ */
2
3 /*
4 * Taken from src/sys/arch/evbppc/walnut/machdep.c:
5 * NetBSD: machdep.c,v 1.67 2021/03/30 05:08:16 rin Exp
6 */
7
8 /*
9 * Copyright 2001, 2002 Wasabi Systems, Inc.
10 * All rights reserved.
11 *
12 * Written by Eduardo Horvath and Simon Burge for Wasabi Systems, Inc.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in the
21 * documentation and/or other materials provided with the distribution.
22 * 3. All advertising materials mentioning features or use of this software
23 * must display the following acknowledgement:
24 * This product includes software developed for the NetBSD Project by
25 * Wasabi Systems, Inc.
26 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
27 * or promote products derived from this software without specific prior
28 * written permission.
29 *
30 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
31 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
32 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
33 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
34 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
35 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
36 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
37 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
38 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
40 * POSSIBILITY OF SUCH DAMAGE.
41 */
42
43 /*
44 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
45 * Copyright (C) 1995, 1996 TooLs GmbH.
46 * All rights reserved.
47 *
48 * Redistribution and use in source and binary forms, with or without
49 * modification, are permitted provided that the following conditions
50 * are met:
51 * 1. Redistributions of source code must retain the above copyright
52 * notice, this list of conditions and the following disclaimer.
53 * 2. Redistributions in binary form must reproduce the above copyright
54 * notice, this list of conditions and the following disclaimer in the
55 * documentation and/or other materials provided with the distribution.
56 * 3. All advertising materials mentioning features or use of this software
57 * must display the following acknowledgement:
58 * This product includes software developed by TooLs GmbH.
59 * 4. The name of TooLs GmbH may not be used to endorse or promote products
60 * derived from this software without specific prior written permission.
61 *
62 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
63 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
64 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
65 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
66 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
67 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
68 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
69 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
70 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
71 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
72 */
73
74 #include <sys/cdefs.h>
75 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.3 2021/09/19 11:37:00 andvar Exp $");
76
77 #include "opt_ddb.h"
78 #include "opt_pci.h"
79
80 #include <sys/param.h>
81 #include <sys/bus.h>
82 #include <sys/device.h>
83 #include <sys/kernel.h>
84 #include <sys/module.h>
85 #include <sys/reboot.h>
86 #include <sys/systm.h>
87
88 #include <machine/dht.h>
89
90 #include <powerpc/spr.h>
91 #include <powerpc/ibm4xx/spr.h>
92
93 #include <powerpc/ibm4xx/cpu.h>
94 #include <powerpc/ibm4xx/dcr4xx.h>
95 #include <powerpc/ibm4xx/ibm405gp.h>
96 #include <powerpc/ibm4xx/openbios.h>
97 #include <powerpc/ibm4xx/tlb.h>
98
99 #include "com.h"
100 #if NCOM > 0
101 #include <sys/termios.h>
102 #include <dev/ic/comreg.h>
103 #include <dev/ic/comvar.h>
104 #include <powerpc/ibm4xx/dev/comopbvar.h>
105 #ifndef CONADDR
106 #define CONADDR IBM405GP_UART0_BASE
107 #endif
108 #ifndef CONSPEED
109 #define CONSPEED B115200
110 #endif
111 #ifndef CONMODE
112 #define CONMODE TTYDEF_CFLAG
113 #endif
114 #endif /* NCOM > 0 */
115
116 #include "emac.h"
117 #if NEMAC > 0
118 #include <net/if_ether.h>
119 #endif
120
121 #include "pci.h"
122 #if NPCI > 0
123 #ifndef PCI_NETBSD_CONFIGURE
124 #error options PCI_NETBSD_CONFIGURE is mandatory.
125 #endif
126 #include <powerpc/ibm4xx/pci_machdep.h>
127 #include <dev/pci/pciconf.h>
128 #include <dev/pci/pcivar.h>
129 #endif
130
131 #define TLB_PG_SIZE (16 * 1024 * 1024)
132
133 static u_int memsize;
134
135 void initppc(vaddr_t, vaddr_t, char *, void *);
136
137 /*
138 * Get memory size from SDRAM bank register.
139 */
140 static u_int
dht_memsize(void)141 dht_memsize(void)
142 {
143 u_int total = 0;
144 uint32_t val, addr;
145
146 for (addr = DCR_SDRAM0_B0CR; addr <= DCR_SDRAM0_B3CR; addr += 4) {
147 mtdcr(DCR_SDRAM0_CFGADDR, addr);
148 val = mfdcr(DCR_SDRAM0_CFGDATA);
149 if (val & SDRAM0_BnCR_EN)
150 total += SDRAM0_BnCR_SZ(val);
151 }
152 return total;
153 }
154
155 void
consinit(void)156 consinit(void)
157 {
158
159 #if NCOM > 0
160 com_opb_cnattach(DHT_COM_FREQ, CONADDR, CONSPEED, CONMODE);
161 #endif
162 }
163
164 void
initppc(vaddr_t startkernel,vaddr_t endkernel,char * args,void * info_block)165 initppc(vaddr_t startkernel, vaddr_t endkernel, char *args, void *info_block)
166 {
167
168 /* Disable all external interrupts */
169 mtdcr(DCR_UIC0_BASE + DCR_UIC_ER, 0);
170
171 memsize = dht_memsize();
172
173 /* Linear map kernel memory */
174 for (vaddr_t va = 0; va < endkernel; va += TLB_PG_SIZE)
175 ppc4xx_tlb_reserve(va, va, TLB_PG_SIZE, TLB_EX);
176
177 /* Map console after physmem (see pmap_tlbmiss()) */
178 ppc4xx_tlb_reserve(IBM405GP_UART0_BASE, roundup(memsize, TLB_PG_SIZE),
179 TLB_PG_SIZE, TLB_I | TLB_G);
180
181 /* Disable all timers */
182 mtspr(SPR_TCR, 0);
183
184 ibm40x_memsize_init(memsize, startkernel);
185 ibm4xx_init(startkernel, endkernel, pic_ext_intr);
186
187 #ifdef DDB
188 if (boothowto & RB_KDB)
189 Debugger();
190 #endif
191 }
192
193 void
cpu_startup(void)194 cpu_startup(void)
195 {
196 prop_number_t pn;
197
198 ibm4xx_cpu_startup("DHT Walnut 405GP Evaluation Board");
199
200 /*
201 * Set up the board properties database.
202 */
203 board_info_init();
204
205 pn = prop_number_create_integer(DHT_CPU_FREQ);
206 KASSERT(pn != NULL);
207 if (prop_dictionary_set(board_properties, "processor-frequency", pn) ==
208 false)
209 panic("setting processor-frequency");
210 prop_object_release(pn);
211
212 pn = prop_number_create_integer(memsize);
213 KASSERT(pn != NULL);
214 if (prop_dictionary_set(board_properties, "mem-size", pn) == false)
215 panic("setting mem-size");
216 prop_object_release(pn);
217
218 #if NEMAC > 0
219 /*
220 * XXX
221 * Unfortunately, no MAC address is assigned to this board.
222 * Set fake address de:ad:be:ef:00:00.
223 *
224 * XXX
225 * This should be same with what U-Boot/PPC-Boot set.
226 */
227 static uint8_t enaddr[ETHER_ADDR_LEN];
228 enaddr[0] = 0xde; enaddr[1] = 0xad; enaddr[2] = 0xbe;
229 enaddr[3] = 0xef; enaddr[4] = 0x00; enaddr[5] = 0x00;
230 prop_data_t pd = prop_data_create_data_nocopy(enaddr, ETHER_ADDR_LEN);
231 KASSERT(pd != NULL);
232 if (prop_dictionary_set(board_properties, "emac0-mac-addr", pd) ==
233 false)
234 panic("setting emac0-mac-addr");
235 prop_object_release(pd);
236 #endif
237
238 /*
239 * Now that we have VM, malloc()s are OK in bus_space.
240 */
241 bus_space_mallocok();
242
243 /*
244 * No fake mapiodev.
245 */
246 fake_mapiodev = 0;
247 }
248
249 #if NPCI > 0
250 int
ibm4xx_pci_bus_maxdevs(void * v,int busno)251 ibm4xx_pci_bus_maxdevs(void *v, int busno)
252 {
253
254 return 32;
255 }
256
257 /*
258 * This is only possible mapping known to work b/w PCI devices and IRQ pins.
259 */
260 #define DEV_TO_IRQ(dev) (27 + (dev))
261 #define PARENT_DEV(swiz, dev) ((swiz) - (dev))
262
263 int
ibm4xx_pci_intr_map(const struct pci_attach_args * pa,pci_intr_handle_t * ihp)264 ibm4xx_pci_intr_map(const struct pci_attach_args *pa, pci_intr_handle_t *ihp)
265 {
266 int pin = pa->pa_intrpin, bus = pa->pa_bus, dev = pa->pa_device;
267
268 if (pin <= 0 || pin > 4)
269 goto bad;
270
271 if (bus != 0) {
272 /*
273 * XXX
274 * We only support ppb(4) directly attached to pci0.
275 */
276 dev = PARENT_DEV(pa->pa_intrswiz, dev);
277 goto out;
278 }
279
280 switch (dev) {
281 case 2:
282 case 3:
283 case 4:
284 out:
285 *ihp = DEV_TO_IRQ(dev);
286 return 0;
287 default:
288 bad:
289 printf("%s: invalid request: bus %d dev %d pin %d\n",
290 __func__, bus, dev, pin);
291 *ihp = -1;
292 return 1;
293 }
294 }
295
296 void
ibm4xx_pci_conf_interrupt(void * v,int bus,int dev,int pin,int swiz,int * iline)297 ibm4xx_pci_conf_interrupt(void *v, int bus, int dev, int pin, int swiz,
298 int *iline)
299 {
300
301 if (bus != 0) {
302 /*
303 * XXX
304 * See comment above.
305 */
306 dev = PARENT_DEV(swiz, dev);
307 goto out;
308 }
309
310 switch (dev) {
311 case 2:
312 case 3:
313 case 4:
314 out:
315 *iline = DEV_TO_IRQ(dev);
316 break;
317 default:
318 printf("%s: invalid request: bus %d dev %d pin %d swiz %d\n",
319 __func__, bus, dev, pin, swiz);
320 *iline = 0;
321 break;
322 }
323 }
324 #endif /* NPCI > 0 */
325