1 /* $NetBSD: integrator_machdep.c,v 1.82 2023/06/24 05:43:26 msaitoh Exp $ */
2
3 /*
4 * Copyright (c) 2001,2002 ARM Ltd
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. The name of the company may not be used to endorse or promote
16 * products derived from this software without specific prior written
17 * permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ARM LTD
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*
33 * Copyright (c) 1997,1998 Mark Brinicombe.
34 * Copyright (c) 1997,1998 Causality Limited.
35 * All rights reserved.
36 *
37 * Redistribution and use in source and binary forms, with or without
38 * modification, are permitted provided that the following conditions
39 * are met:
40 * 1. Redistributions of source code must retain the above copyright
41 * notice, this list of conditions and the following disclaimer.
42 * 2. Redistributions in binary form must reproduce the above copyright
43 * notice, this list of conditions and the following disclaimer in the
44 * documentation and/or other materials provided with the distribution.
45 * 3. All advertising materials mentioning features or use of this software
46 * must display the following acknowledgement:
47 * This product includes software developed by Mark Brinicombe
48 * for the NetBSD Project.
49 * 4. The name of the company nor the name of the author may be used to
50 * endorse or promote products derived from this software without specific
51 * prior written permission.
52 *
53 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
54 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
55 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
56 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
57 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
58 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
59 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
63 * SUCH DAMAGE.
64 *
65 * Machine dependent functions for kernel setup for integrator board
66 *
67 * Created : 24/11/97
68 */
69
70 #include <sys/cdefs.h>
71 __KERNEL_RCSID(0, "$NetBSD: integrator_machdep.c,v 1.82 2023/06/24 05:43:26 msaitoh Exp $");
72
73 #include "opt_arm_debug.h"
74 #include "opt_console.h"
75 #include "opt_ddb.h"
76
77 #include <sys/param.h>
78 #include <sys/device.h>
79 #include <sys/systm.h>
80 #include <sys/kernel.h>
81 #include <sys/exec.h>
82 #include <sys/proc.h>
83 #include <sys/msgbuf.h>
84 #include <sys/reboot.h>
85 #include <sys/termios.h>
86 #include <sys/ksyms.h>
87 #include <sys/bus.h>
88 #include <sys/cpu.h>
89 #include <sys/intr.h>
90
91 #include <uvm/uvm_extern.h>
92
93 #include <dev/cons.h>
94
95 #include <machine/db_machdep.h>
96 #include <ddb/db_sym.h>
97 #include <ddb/db_extern.h>
98
99 #include <machine/bootconfig.h>
100 #include <arm/locore.h>
101 #include <arm/undefined.h>
102
103 #include <arm/arm32/machdep.h>
104
105 #include <evbarm/integrator/integrator_boot.h>
106
107 #include "pci.h"
108 #include "ksyms.h"
109
110 void ifpga_reset(void) __attribute__((noreturn));
111
112 /*
113 * The range 0xc1000000 - 0xccffffff is available for kernel VM space
114 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff
115 */
116 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000)
117 #define KERNEL_VM_SIZE 0x0C000000
118
119 BootConfig bootconfig; /* Boot config storage */
120 char *boot_args = NULL;
121 char *boot_file = NULL;
122
123 /* Prototypes */
124
125 static void integrator_sdram_bounds (paddr_t *, psize_t *);
126
127 void consinit(void);
128
129 /* A load of console goo. */
130 #include "vga.h"
131 #if NVGA > 0
132 #include <dev/ic/mc6845reg.h>
133 #include <dev/ic/pcdisplayvar.h>
134 #include <dev/ic/vgareg.h>
135 #include <dev/ic/vgavar.h>
136 #endif
137
138 #include "pckbc.h"
139 #if NPCKBC > 0
140 #include <dev/ic/i8042reg.h>
141 #include <dev/ic/pckbcvar.h>
142 #endif
143
144 #include "com.h"
145 #if NCOM > 0
146 #include <dev/ic/comreg.h>
147 #include <dev/ic/comvar.h>
148 #ifndef CONCOMADDR
149 #define CONCOMADDR 0x3f8
150 #endif
151 #endif
152
153 /*
154 * Define the default console speed for the board. This is generally
155 * what the firmware provided with the board defaults to.
156 */
157 #ifndef CONSPEED
158 #define CONSPEED B115200
159 #endif
160 #ifndef CONMODE
161 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
162 #endif
163
164 int comcnspeed = CONSPEED;
165 int comcnmode = CONMODE;
166
167 #include "plcom.h"
168 #if (NPLCOM > 0)
169 #include <evbarm/dev/plcomreg.h>
170 #include <evbarm/dev/plcomvar.h>
171
172 #include <evbarm/ifpga/ifpgamem.h>
173 #include <evbarm/ifpga/ifpgareg.h>
174 #include <evbarm/ifpga/ifpgavar.h>
175 #endif
176
177 #ifndef CONSDEVNAME
178 #define CONSDEVNAME "plcom"
179 #endif
180
181 #ifndef PLCONSPEED
182 #define PLCONSPEED B38400
183 #endif
184 #ifndef PLCONMODE
185 #define PLCONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
186 #endif
187 #ifndef PLCOMCNUNIT
188 #define PLCOMCNUNIT -1
189 #endif
190
191 int plcomcnspeed = PLCONSPEED;
192 int plcomcnmode = PLCONMODE;
193
194 #if 0
195 extern struct consdev kcomcons;
196 static void kcomcnputc(dev_t, int);
197 #endif
198
199 /*
200 * void cpu_reboot(int howto, char *bootstr)
201 *
202 * Reboots the system
203 *
204 * Deal with any syncing, unmounting, dumping and shutdown hooks,
205 * then reset the CPU.
206 */
207 void
cpu_reboot(int howto,char * bootstr)208 cpu_reboot(int howto, char *bootstr)
209 {
210
211 /*
212 * If we are still cold then hit the air brakes
213 * and crash to earth fast
214 */
215 if (cold) {
216 doshutdownhooks();
217 pmf_system_shutdown(boothowto);
218 printf("The operating system has halted.\n");
219 printf("Please press any key to reboot.\n\n");
220 cngetc();
221 printf("rebooting...\n");
222 ifpga_reset();
223 /*NOTREACHED*/
224 }
225
226 /* Disable console buffering */
227
228 /*
229 * If RB_NOSYNC was not specified sync the discs.
230 * Note: Unless cold is set to 1 here, syslogd will die during the
231 * unmount. It looks like syslogd is getting woken up only to find
232 * that it cannot page part of the binary in as the filesystem has
233 * been unmounted.
234 */
235 if (!(howto & RB_NOSYNC))
236 bootsync();
237
238 /* Say NO to interrupts */
239 splhigh();
240
241 /* Do a dump if requested. */
242 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
243 dumpsys();
244
245 /* Run any shutdown hooks */
246 doshutdownhooks();
247
248 pmf_system_shutdown(boothowto);
249
250 /* Make sure IRQ's are disabled */
251 IRQdisable;
252
253 if (howto & RB_HALT) {
254 printf("The operating system has halted.\n");
255 printf("Please press any key to reboot.\n\n");
256 cngetc();
257 }
258
259 printf("rebooting...\n");
260 ifpga_reset();
261 /*NOTREACHED*/
262 }
263
264 /* Statically mapped devices. */
265 static const struct pmap_devmap integrator_devmap[] = {
266 #if NPLCOM > 0 && defined(PLCONSOLE)
267 DEVMAP_ENTRY(
268 UART0_BOOT_BASE,
269 IFPGA_IO_BASE + IFPGA_UART0,
270 1024 * 1024
271 ),
272
273 DEVMAP_ENTRY(
274 UART1_BOOT_BASE,
275 IFPGA_IO_BASE + IFPGA_UART1,
276 1024 * 1024
277 ),
278 #endif
279 #if NPCI > 0
280 DEVMAP_ENTRY(
281 IFPGA_PCI_IO_VBASE,
282 IFPGA_PCI_IO_BASE,
283 IFPGA_PCI_IO_VSIZE
284 ),
285
286 DEVMAP_ENTRY(
287 IFPGA_PCI_CONF_VBASE,
288 IFPGA_PCI_CONF_BASE,
289 IFPGA_PCI_CONF_VSIZE
290 ),
291 #endif
292
293 DEVMAP_ENTRY_END
294 };
295
296 /*
297 * vaddr_t initarm(...)
298 *
299 * Initial entry point on startup. This gets called before main() is
300 * entered.
301 * It should be responsible for setting up everything that must be
302 * in place when main is called.
303 * This includes
304 * Taking a copy of the boot configuration structure.
305 * Initialising the physical console so characters can be printed.
306 * Setting up page tables for the kernel
307 * Relocating the kernel to the bottom of physical memory
308 */
309
310 vaddr_t
initarm(void * arg)311 initarm(void *arg)
312 {
313 extern int KERNEL_BASE_phys[];
314 paddr_t memstart;
315 psize_t memsize;
316
317 /*
318 * Heads up ... Setup the CPU / MMU / TLB functions
319 */
320 if (set_cpufuncs())
321 panic("cpu not recognized!");
322
323 /* map some peripheral registers */
324
325 pmap_devmap_bootstrap((vaddr_t)armreg_ttbr_read() & -L1_TABLE_SIZE,
326 integrator_devmap);
327
328 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
329
330 consinit();
331
332 /* Talk to the user */
333 #define BDSTR(s) _BDSTR(s)
334 #define _BDSTR(s) #s
335 printf("\nNetBSD/evbarm (" BDSTR(EVBARM_BOARDTYPE) ") booting ...\n");
336
337 /*
338 * Fetch the SDRAM start/size from the CM configuration registers.
339 */
340 integrator_sdram_bounds(&memstart, &memsize);
341
342 #if defined(INTEGRATOR_CP)
343 /*
344 * XXX QEMU reports SDRAM starting at 0x100000, but presents a flat
345 * physical memory model. Set memstart to 0x0, so arm32_bootmem_init
346 * doesn't get fooled later.
347 */
348 memstart = 0;
349 #endif
350
351 #ifdef VERBOSE_INIT_ARM
352 printf("initarm: Configuring system ...\n");
353 #endif
354
355 /* Fake bootconfig structure for the benefit of pmap.c */
356 /* XXX must make the memory description h/w independent */
357 bootconfig.dramblocks = 1;
358 bootconfig.dram[0].address = memstart;
359 bootconfig.dram[0].pages = memsize / PAGE_SIZE;
360 bootconfig.dram[0].flags = BOOT_DRAM_CAN_DMA;
361
362 arm32_bootmem_init(bootconfig.dram[0].address,
363 bootconfig.dram[0].pages * PAGE_SIZE, (unsigned int) KERNEL_BASE_phys);
364
365 arm32_kernel_vm_init(KERNEL_VM_BASE, ARM_VECTORS_LOW, 0, integrator_devmap,
366 false);
367
368 #ifdef VERBOSE_INIT_ARM
369 printf("done.\n");
370 #endif
371
372 return initarm_common(KERNEL_VM_BASE, KERNEL_VM_SIZE, NULL, 0);
373 }
374
375 void
consinit(void)376 consinit(void)
377 {
378 static int consinit_called = 0;
379 #if 0
380 char *console = CONSDEVNAME;
381 #endif
382
383 if (consinit_called != 0)
384 return;
385
386 consinit_called = 1;
387
388 #if NPLCOM > 0 && defined(PLCONSOLE)
389 if (PLCOMCNUNIT == 0) {
390 extern struct bus_space ifpga_common_bs_tag;
391 static struct plcom_instance ifpga_pi1 = {
392 #if defined(INTEGRATOR_CP)
393 .pi_type = PLCOM_TYPE_PL011,
394 #else
395 .pi_type = PLCOM_TYPE_PL010,
396 #endif
397 .pi_iot = &ifpga_common_bs_tag,
398 .pi_size = IFPGA_UART_SIZE,
399 .pi_iobase = IFPGA_UART0
400 };
401
402 if (plcomcnattach(&ifpga_pi1, plcomcnspeed, IFPGA_UART_CLK,
403 plcomcnmode, PLCOMCNUNIT))
404 panic("can't init serial console");
405 return;
406 } else if (PLCOMCNUNIT == 1) {
407 extern struct bus_space ifpga_common_bs_tag;
408 static struct plcom_instance ifpga_pi1 = {
409 #if defined(INTEGRATOR_CP)
410 .pi_type = PLCOM_TYPE_PL011,
411 #else
412 .pi_type = PLCOM_TYPE_PL010,
413 #endif
414 .pi_iot = &ifpga_common_bs_tag,
415 .pi_size = IFPGA_UART_SIZE,
416 .pi_iobase = IFPGA_UART1
417 };
418
419 if (plcomcnattach(&ifpga_pi1, plcomcnspeed, IFPGA_UART_CLK,
420 plcomcnmode, PLCOMCNUNIT))
421 panic("can't init serial console");
422 return;
423 }
424 #endif
425 #if (NCOM > 0)
426 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed,
427 COM_FREQ, COM_TYPE_NORMAL, comcnmode))
428 panic("can't init serial console @%x", CONCOMADDR);
429 return;
430 #endif
431 panic("No serial console configured");
432 }
433
434 static void
integrator_sdram_bounds(paddr_t * memstart,psize_t * memsize)435 integrator_sdram_bounds(paddr_t *memstart, psize_t *memsize)
436 {
437 volatile unsigned long *cm_sdram
438 = (volatile unsigned long *)0x10000020;
439 volatile unsigned long *cm_stat
440 = (volatile unsigned long *)0x10000010;
441
442 *memstart = *cm_stat & 0x00ff0000;
443
444 /*
445 * Although the SSRAM overlaps the SDRAM, we can use the wrap-around
446 * to access the entire bank.
447 */
448 switch ((*cm_sdram >> 2) & 0x7)
449 {
450 case 0:
451 *memsize = 16 * 1024 * 1024;
452 break;
453 case 1:
454 *memsize = 32 * 1024 * 1024;
455 break;
456 case 2:
457 *memsize = 64 * 1024 * 1024;
458 break;
459 case 3:
460 *memsize = 128 * 1024 * 1024;
461 break;
462 case 4:
463 /* With 256M of memory there is no wrap-around. */
464 *memsize = 256 * 1024 * 1024 - *memstart;
465 break;
466 default:
467 printf("CM_SDRAM returns unknown value, using 16M\n");
468 *memsize = 16 * 1024 * 1024;
469 break;
470 }
471 }
472