1 /* $NetBSD: viper_machdep.c,v 1.35 2024/02/20 23:36:01 andvar Exp $ */
2
3 /*
4 * Startup routines for the Arcom Viper. Below you can trace the
5 * impressive lineage ;)
6 *
7 * Modified for the Viper by Antti Kantee <pooka@netbsd.org>
8 */
9
10 /*
11 * Copyright (c) 2002, 2003, 2005 Genetec Corporation. All rights reserved.
12 * Written by Hiroyuki Bessho for Genetec Corporation.
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. The name of Genetec Corporation may not be used to endorse or
23 * promote products derived from this software without specific prior
24 * written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY GENETEC CORPORATION ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENETEC CORPORATION
30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36 * POSSIBILITY OF SUCH DAMAGE.
37 *
38 * Machine dependent functions for kernel setup for
39 * Intel DBPXA250 evaluation board (a.k.a. Lubbock).
40 * Based on iq80310_machhdep.c
41 */
42 /*
43 * Copyright (c) 2001 Wasabi Systems, Inc.
44 * All rights reserved.
45 *
46 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
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 for the NetBSD Project by
59 * Wasabi Systems, Inc.
60 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
61 * or promote products derived from this software without specific prior
62 * written permission.
63 *
64 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
65 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
66 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
67 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
68 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
69 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
70 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
71 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
72 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
73 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
74 * POSSIBILITY OF SUCH DAMAGE.
75 */
76
77 /*
78 * Copyright (c) 1997,1998 Mark Brinicombe.
79 * Copyright (c) 1997,1998 Causality Limited.
80 * All rights reserved.
81 *
82 * Redistribution and use in source and binary forms, with or without
83 * modification, are permitted provided that the following conditions
84 * are met:
85 * 1. Redistributions of source code must retain the above copyright
86 * notice, this list of conditions and the following disclaimer.
87 * 2. Redistributions in binary form must reproduce the above copyright
88 * notice, this list of conditions and the following disclaimer in the
89 * documentation and/or other materials provided with the distribution.
90 * 3. All advertising materials mentioning features or use of this software
91 * must display the following acknowledgement:
92 * This product includes software developed by Mark Brinicombe
93 * for the NetBSD Project.
94 * 4. The name of the company nor the name of the author may be used to
95 * endorse or promote products derived from this software without specific
96 * prior written permission.
97 *
98 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
99 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
100 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
101 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
102 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
103 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
104 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
105 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
106 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
107 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
108 * SUCH DAMAGE.
109 *
110 * Machine dependent functions for kernel setup for Intel IQ80310 evaluation
111 * boards using RedBoot firmware.
112 */
113
114 #include <sys/cdefs.h>
115 __KERNEL_RCSID(0, "$NetBSD: viper_machdep.c,v 1.35 2024/02/20 23:36:01 andvar Exp $");
116
117 #include "opt_arm_debug.h"
118 #include "opt_console.h"
119 #include "opt_ddb.h"
120 #include "opt_kgdb.h"
121 #include "opt_md.h"
122 #include "opt_com.h"
123 #include "lcd.h"
124
125 #include <sys/param.h>
126 #include <sys/device.h>
127 #include <sys/systm.h>
128 #include <sys/kernel.h>
129 #include <sys/exec.h>
130 #include <sys/proc.h>
131 #include <sys/msgbuf.h>
132 #include <sys/reboot.h>
133 #include <sys/termios.h>
134 #include <sys/ksyms.h>
135 #include <sys/bus.h>
136 #include <sys/cpu.h>
137
138 #include <uvm/uvm_extern.h>
139
140 #include <sys/conf.h>
141 #include <dev/cons.h>
142 #include <dev/md.h>
143 #include <dev/ic/smc91cxxreg.h>
144
145 #include <machine/db_machdep.h>
146 #include <ddb/db_sym.h>
147 #include <ddb/db_extern.h>
148 #ifdef KGDB
149 #include <sys/kgdb.h>
150 #endif
151
152 #include <machine/bootconfig.h>
153 #include <arm/locore.h>
154 #include <arm/undefined.h>
155
156 #include <arm/arm32/machdep.h>
157
158 #include <arm/xscale/pxa2x0reg.h>
159 #include <arm/xscale/pxa2x0var.h>
160 #include <arm/xscale/pxa2x0_gpio.h>
161 #include <arm/sa11x0/sa1111_reg.h>
162 #include <evbarm/viper/viper_reg.h>
163
164 /* Kernel text starts 2MB in from the bottom of the kernel address space. */
165 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000)
166 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000)
167
168 /*
169 * The range 0xc1000000 - 0xccffffff is available for kernel VM space
170 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff
171 */
172 #define KERNEL_VM_SIZE 0x0C000000
173
174 BootConfig bootconfig; /* Boot config storage */
175 char *boot_args = NULL;
176 char *boot_file = NULL;
177
178 vaddr_t physical_start;
179 vaddr_t physical_freestart;
180 vaddr_t physical_freeend;
181 vaddr_t physical_end;
182 u_int free_pages;
183
184 /*int debug_flags;*/
185 #ifndef PMAP_STATIC_L1S
186 int max_processes = 64; /* Default number */
187 #endif /* !PMAP_STATIC_L1S */
188
189 /* Physical and virtual addresses for some global pages */
190 pv_addr_t minidataclean;
191
192 paddr_t msgbufphys;
193
194 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */
195 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */
196 #define KERNEL_PT_KERNEL_NUM 4
197 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL+KERNEL_PT_KERNEL_NUM)
198 /* Page tables for mapping kernel VM */
199 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */
200 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
201
202 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS];
203
204 /* Prototypes */
205
206 #if 0
207 void process_kernel_args(char *);
208 #endif
209
210 void consinit(void);
211 void kgdb_port_init(void);
212 void change_clock(uint32_t v);
213
214 bs_protos(bs_notimpl);
215
216 #include "com.h"
217 #if NCOM > 0
218 #include <dev/ic/comreg.h>
219 #include <dev/ic/comvar.h>
220 #endif
221
222 #ifndef CONSPEED
223 #define CONSPEED B115200 /* What RedBoot uses */
224 #endif
225 #ifndef CONMODE
226 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
227 #endif
228
229 int comcnspeed = CONSPEED;
230 int comcnmode = CONMODE;
231
232 static struct pxa2x0_gpioconf boarddep_gpioconf[] = {
233 { 44, GPIO_ALT_FN_1_IN }, /* BTCST */
234 { 45, GPIO_ALT_FN_2_OUT }, /* BTRST */
235
236 { -1 }
237 };
238 static struct pxa2x0_gpioconf *viper_gpioconf[] = {
239 pxa25x_com_btuart_gpioconf,
240 pxa25x_com_ffuart_gpioconf,
241 pxa25x_com_stuart_gpioconf,
242 boarddep_gpioconf,
243 NULL
244 };
245
246 /*
247 * void cpu_reboot(int howto, char *bootstr)
248 *
249 * Reboots the system
250 *
251 * Deal with any syncing, unmounting, dumping and shutdown hooks,
252 * then reset the CPU.
253 */
254 void
cpu_reboot(int howto,char * bootstr)255 cpu_reboot(int howto, char *bootstr)
256 {
257 #ifdef DIAGNOSTIC
258 /* info */
259 printf("boot: howto=%08x curproc=%p\n", howto, curproc);
260 #endif
261
262 /*
263 * If we are still cold then hit the air brakes
264 * and crash to earth fast
265 */
266 if (cold) {
267 doshutdownhooks();
268 pmf_system_shutdown(boothowto);
269 printf("The operating system has halted.\n");
270 printf("Please press any key to reboot.\n\n");
271 cngetc();
272 printf("rebooting...\n");
273 cpu_reset();
274 /*NOTREACHED*/
275 }
276
277 /* Disable console buffering */
278 /* cnpollc(1);*/
279
280 /*
281 * If RB_NOSYNC was not specified sync the discs.
282 * Note: Unless cold is set to 1 here, syslogd will die during the
283 * unmount. It looks like syslogd is getting woken up only to find
284 * that it cannot page part of the binary in as the filesystem has
285 * been unmounted.
286 */
287 if (!(howto & RB_NOSYNC))
288 bootsync();
289
290 /* Say NO to interrupts */
291 splhigh();
292
293 /* Do a dump if requested. */
294 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
295 dumpsys();
296
297 /* Run any shutdown hooks */
298 doshutdownhooks();
299
300 pmf_system_shutdown(boothowto);
301
302 /* Make sure IRQ's are disabled */
303 IRQdisable;
304
305 if (howto & RB_HALT) {
306 printf("The operating system has halted.\n");
307 printf("Please press any key to reboot.\n\n");
308 cngetc();
309 }
310
311 printf("rebooting...\n");
312 cpu_reset();
313 /*NOTREACHED*/
314 }
315
316 /*
317 * Static device mappings. These peripheral registers are mapped at
318 * fixed virtual addresses very early in viper_start() so that we
319 * can use them while booting the kernel, and stay at the same address
320 * throughout whole kernel's life time.
321 *
322 * We use this table twice; once with bootstrap page table, and once
323 * with kernel's page table which we build up in initarm().
324 */
325
326 static const struct pmap_devmap viper_devmap[] = {
327 {
328 VIPER_GPIO_VBASE,
329 PXA2X0_GPIO_BASE,
330 L1_S_SIZE,
331 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE,
332 },
333 {
334 VIPER_CLKMAN_VBASE,
335 PXA2X0_CLKMAN_BASE,
336 L1_S_SIZE,
337 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE,
338 },
339 {
340 VIPER_INTCTL_VBASE,
341 PXA2X0_INTCTL_BASE,
342 L1_S_SIZE,
343 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE,
344 },
345 {
346 VIPER_FFUART_VBASE,
347 PXA2X0_FFUART_BASE,
348 L1_S_SIZE,
349 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE,
350 },
351 {
352 VIPER_BTUART_VBASE,
353 PXA2X0_BTUART_BASE,
354 L1_S_SIZE,
355 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE,
356 },
357
358 {0, 0, 0, 0,}
359 };
360
361 #ifndef MEMSTART
362 #define MEMSTART 0xa0000000
363 #endif
364 #ifndef MEMSIZE
365 #define MEMSIZE 0x4000000
366 #endif
367
368 /*
369 * vaddr_t initarm(...)
370 *
371 * Initial entry point on startup. This gets called before main() is
372 * entered.
373 * It should be responsible for setting up everything that must be
374 * in place when main is called.
375 * This includes
376 * Taking a copy of the boot configuration structure.
377 * Initialising the physical console so characters can be printed.
378 * Setting up page tables for the kernel
379 * Relocating the kernel to the bottom of physical memory
380 */
381 vaddr_t
initarm(void * arg)382 initarm(void *arg)
383 {
384 int loop;
385 int loop1;
386 u_int l1pagetable;
387
388 /* Register devmap for devices we mapped in start */
389 pmap_devmap_register(viper_devmap);
390
391 /* start 32.768 kHz OSC */
392 ioreg_write(VIPER_CLKMAN_VBASE + 0x08, 2);
393 /* Get ready for splfoo() */
394 pxa2x0_intr_bootstrap(VIPER_INTCTL_VBASE);
395
396 /*
397 * Heads up ... Setup the CPU / MMU / TLB functions
398 */
399 if (set_cpufuncs())
400 panic("cpu not recognized!");
401
402 #if 0
403 /* Calibrate the delay loop. */
404 #endif
405
406 /* setup GPIO for BTUART, in case bootloader doesn't take care of it */
407 pxa2x0_gpio_bootstrap(VIPER_GPIO_VBASE);
408 pxa2x0_gpio_config(viper_gpioconf);
409
410 /* turn on clock to UART block.
411 XXX: this should not be done here. */
412 ioreg_write(VIPER_CLKMAN_VBASE+CLKMAN_CKEN, CKEN_FFUART|CKEN_BTUART |
413 ioreg_read(VIPER_CLKMAN_VBASE+CLKMAN_CKEN));
414
415 consinit();
416 #ifdef KGDB
417 kgdb_port_init();
418 #endif
419 /* Talk to the user */
420 printf("\nNetBSD/evbarm (viper) booting ...\n");
421
422 #if 0
423 /*
424 * Examine the boot args string for options we need to know about
425 * now.
426 */
427 process_kernel_args((char *)nwbootinfo.bt_args);
428 #endif
429
430 printf("initarm: Configuring system ...\n");
431
432 /* Fake bootconfig structure for the benefit of pmap.c */
433 /* XXX must make the memory description h/w independent */
434 bootconfig.dramblocks = 1;
435 bootconfig.dram[0].address = MEMSTART;
436 bootconfig.dram[0].pages = MEMSIZE / PAGE_SIZE;
437
438 /*
439 * Set up the variables that define the availability of
440 * physical memory. For now, we're going to set
441 * physical_freestart to 0xa0200000 (where the kernel
442 * was loaded), and allocate the memory we need downwards.
443 * If we get too close to the page tables that RedBoot
444 * set up, we will panic. We will update physical_freestart
445 * and physical_freeend later to reflect what pmap_bootstrap()
446 * wants to see.
447 *
448 * XXX pmap_bootstrap() needs an enema.
449 * (now that would be truly hardcore XXX)
450 */
451 physical_start = bootconfig.dram[0].address;
452 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE);
453
454 physical_freestart = 0xa0009000UL;
455 physical_freeend = 0xa0200000UL;
456
457 physmem = (physical_end - physical_start) / PAGE_SIZE;
458
459 #ifdef VERBOSE_INIT_ARM
460 /* Tell the user about the memory */
461 printf("physmemory: 0x%"PRIxPSIZE" pages at 0x%08lx -> 0x%08lx\n", physmem,
462 physical_start, physical_end - 1);
463 #endif
464
465 /*
466 * Okay, the kernel starts 2MB in from the bottom of physical
467 * memory. We are going to allocate our bootstrap pages downwards
468 * from there.
469 *
470 * We need to allocate some fixed page tables to get the kernel
471 * going. We allocate one page directory and a number of page
472 * tables and store the physical addresses in the kernel_pt_table
473 * array.
474 *
475 * The kernel page directory must be on a 16K boundary. The page
476 * tables must be on 4K boundaries. What we do is allocate the
477 * page directory on the first 16K boundary that we encounter, and
478 * the page tables on 4K boundaries otherwise. Since we allocate
479 * at least 3 L2 page tables, we are guaranteed to encounter at
480 * least one 16K aligned region.
481 */
482
483 #ifdef VERBOSE_INIT_ARM
484 printf("Allocating page tables\n");
485 #endif
486
487 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;
488
489 #ifdef VERBOSE_INIT_ARM
490 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n",
491 physical_freestart, free_pages, free_pages);
492 #endif
493
494 /* Define a macro to simplify memory allocation */
495 #define valloc_pages(var, np) \
496 alloc_pages((var).pv_pa, (np)); \
497 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;
498
499 #define alloc_pages(var, np) \
500 physical_freeend -= ((np) * PAGE_SIZE); \
501 if (physical_freeend < physical_freestart) \
502 panic("initarm: out of memory"); \
503 (var) = physical_freeend; \
504 free_pages -= (np); \
505 memset((char *)(var), 0, ((np) * PAGE_SIZE));
506
507 loop1 = 0;
508 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
509 /* Are we 16KB aligned for an L1 ? */
510 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
511 && kernel_l1pt.pv_pa == 0) {
512 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
513 } else {
514 valloc_pages(kernel_pt_table[loop1],
515 L2_TABLE_SIZE / PAGE_SIZE);
516 ++loop1;
517 }
518 }
519
520 /* This should never be able to happen but better confirm that. */
521 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
522 panic("initarm: Failed to align the kernel page directory");
523
524 /*
525 * Allocate a page for the system page mapped to V0x00000000
526 * This page will just contain the system vectors and can be
527 * shared by all processes.
528 */
529 alloc_pages(systempage.pv_pa, 1);
530
531 /* Allocate stacks for all modes */
532 valloc_pages(irqstack, IRQ_STACK_SIZE);
533 valloc_pages(abtstack, ABT_STACK_SIZE);
534 valloc_pages(undstack, UND_STACK_SIZE);
535 valloc_pages(kernelstack, UPAGES);
536
537 /* Allocate enough pages for cleaning the Mini-Data cache. */
538 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE);
539 valloc_pages(minidataclean, 1);
540
541 #ifdef VERBOSE_INIT_ARM
542 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
543 irqstack.pv_va);
544 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
545 abtstack.pv_va);
546 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
547 undstack.pv_va);
548 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
549 kernelstack.pv_va);
550 #endif
551
552 /*
553 * XXX Defer this to later so that we can reclaim the memory
554 * XXX used by the RedBoot page tables.
555 */
556 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);
557
558 /*
559 * Ok we have allocated physical pages for the primary kernel
560 * page tables
561 */
562
563 #ifdef VERBOSE_INIT_ARM
564 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
565 #endif
566
567 /*
568 * Now we start construction of the L1 page table
569 * We start by mapping the L2 page tables into the L1.
570 * This means that we can replace L1 mappings later on if necessary
571 */
572 l1pagetable = kernel_l1pt.pv_pa;
573
574 /* Map the L2 pages tables in the L1 page table */
575 pmap_link_l2pt(l1pagetable, 0x00000000,
576 &kernel_pt_table[KERNEL_PT_SYS]);
577 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
578 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
579 &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
580 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
581 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
582 &kernel_pt_table[KERNEL_PT_VMDATA + loop]);
583
584 /* update the top of the kernel VM */
585 pmap_curmaxkvaddr =
586 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);
587
588 #ifdef VERBOSE_INIT_ARM
589 printf("Mapping kernel\n");
590 #endif
591
592 /* Now we fill in the L2 pagetable for the kernel static code/data */
593 {
594 extern char etext[], _end[];
595 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE;
596 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE;
597 u_int logical;
598
599 textsize = (textsize + PGOFSET) & ~PGOFSET;
600 totalsize = (totalsize + PGOFSET) & ~PGOFSET;
601
602 logical = 0x00200000; /* offset of kernel in RAM */
603
604 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
605 physical_start + logical, textsize,
606 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
607 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
608 physical_start + logical, totalsize - textsize,
609 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
610 }
611
612 #ifdef VERBOSE_INIT_ARM
613 printf("Constructing L2 page tables\n");
614 #endif
615
616 /* Map the stack pages */
617 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
618 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
619 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
620 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
621 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
622 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
623 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
624 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE);
625
626 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
627 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE);
628
629 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
630 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
631 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
632 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
633 }
634
635 /* Map the Mini-Data cache clean area. */
636 xscale_setup_minidata(l1pagetable, minidataclean.pv_va,
637 minidataclean.pv_pa);
638
639 /* Map the vector page. */
640 #if 1
641 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the
642 * cache-clean code there. */
643 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa,
644 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE);
645 #else
646 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa,
647 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
648 #endif
649
650 /*
651 * map integrated peripherals at same address in l1pagetable
652 * so that we can continue to use console.
653 */
654 pmap_devmap_bootstrap(l1pagetable, viper_devmap);
655
656 /*
657 * Give the XScale global cache clean code an appropriately
658 * sized chunk of unmapped VA space starting at 0xff000000
659 * (our device mappings end before this address).
660 */
661 xscale_cache_clean_addr = 0xff000000U;
662
663 /*
664 * Now we have the real page tables in place so we can switch to them.
665 * Once this is done we will be running with the REAL kernel page
666 * tables.
667 */
668
669 /*
670 * Update the physical_freestart/physical_freeend/free_pages
671 * variables.
672 */
673 {
674 extern char _end[];
675
676 physical_freestart = physical_start +
677 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) -
678 KERNEL_BASE);
679 physical_freeend = physical_end;
680 free_pages =
681 (physical_freeend - physical_freestart) / PAGE_SIZE;
682 }
683
684 /* Switch tables */
685 #ifdef VERBOSE_INIT_ARM
686 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
687 physical_freestart, free_pages, free_pages);
688 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa);
689 #endif
690
691 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
692 cpu_setttb(kernel_l1pt.pv_pa, true);
693 cpu_tlb_flushID();
694 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
695
696 /*
697 * Moved from cpu_startup() as data_abort_handler() references
698 * this during uvm init
699 */
700 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);
701
702 #ifdef VERBOSE_INIT_ARM
703 printf("bootstrap done.\n");
704 #endif
705
706 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL);
707
708 /*
709 * Pages were allocated during the secondary bootstrap for the
710 * stacks for different CPU modes.
711 * We must now set the r13 registers in the different CPU modes to
712 * point to these stacks.
713 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
714 * of the stack memory.
715 */
716 printf("init subsystems: stacks ");
717
718 set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
719 set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
720 set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
721
722 /*
723 * Well we should set a data abort handler.
724 * Once things get going this will change as we will need a proper
725 * handler.
726 * Until then we will use a handler that just panics but tells us
727 * why.
728 * Initialisation of the vectors will just panic on a data abort.
729 * This just fills in a slightly better one.
730 */
731 printf("vectors ");
732 data_abort_handler_address = (u_int)data_abort_handler;
733 prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
734 undefined_handler_address = (u_int)undefinedinstruction_bounce;
735
736 /* Initialise the undefined instruction handlers */
737 printf("undefined ");
738 undefined_init();
739
740 /* Load memory into UVM. */
741 printf("page ");
742 uvm_md_init();
743 uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
744 atop(physical_freestart), atop(physical_freeend),
745 VM_FREELIST_DEFAULT);
746
747 /* Boot strap pmap telling it where managed kernel virtual memory is */
748 printf("pmap ");
749 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);
750
751 #ifdef __HAVE_MEMORY_DISK__
752 md_root_setconf(memory_disk, sizeof memory_disk);
753 #endif
754
755 #ifdef KGDB
756 if (boothowto & RB_KDB) {
757 kgdb_debug_init = 1;
758 kgdb_connect(1);
759 }
760 #endif
761
762 #ifdef DDB
763 db_machine_init();
764
765 /* Firmware doesn't load symbols. */
766 ddb_init(0, NULL, NULL);
767
768 if (boothowto & RB_KDB)
769 Debugger();
770 #endif
771
772 /* We return the new stack pointer address */
773 return kernelstack.pv_va + USPACE_SVC_STACK_TOP;
774 }
775
776 #if 0
777 void
778 process_kernel_args(char *args)
779 {
780
781 boothowto = 0;
782
783 /* Make a local copy of the bootargs */
784 strncpy(bootargs, args, MAX_BOOT_STRING);
785
786 args = bootargs;
787 boot_file = bootargs;
788
789 /* Skip the kernel image filename */
790 while (*args != ' ' && *args != 0)
791 ++args;
792
793 if (*args != 0)
794 *args++ = 0;
795
796 while (*args == ' ')
797 ++args;
798
799 boot_args = args;
800
801 printf("bootfile: %s\n", boot_file);
802 printf("bootargs: %s\n", boot_args);
803
804 parse_mi_bootargs(boot_args);
805 }
806 #endif
807
808 #ifdef KGDB
809 #ifndef KGDB_DEVNAME
810 #define KGDB_DEVNAME "ffuart"
811 #endif
812 const char kgdb_devname[] = KGDB_DEVNAME;
813
814 #if (NCOM > 0)
815 #ifndef KGDB_DEVMODE
816 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
817 #endif
818 int comkgdbmode = KGDB_DEVMODE;
819 #endif /* NCOM */
820
821 #endif /* KGDB */
822
823
824 void
consinit(void)825 consinit(void)
826 {
827 static int consinit_called = 0;
828 uint32_t ckenreg = ioreg_read(VIPER_CLKMAN_VBASE+CLKMAN_CKEN);
829 #if 0
830 char *console = CONSDEVNAME;
831 #endif
832
833 if (consinit_called != 0)
834 return;
835 consinit_called = 1;
836
837 #if NCOM > 0
838
839 #ifdef FFUARTCONSOLE
840 #ifdef KGDB
841 if (0 == strcmp(kgdb_devname, "ffuart")) {
842 /* port is reserved for kgdb */
843 } else
844 #endif
845 if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_FFUART_BASE,
846 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) {
847
848 #if 0
849 /* XXX: can't call pxa2x0_clkman_config yet */
850 pxa2x0_clkman_config(CKEN_FFUART, 1);
851 #else
852 ioreg_write(VIPER_CLKMAN_VBASE+CLKMAN_CKEN,
853 ckenreg|CKEN_FFUART);
854 #endif
855
856 return;
857 }
858
859 #endif /* FFUARTCONSOLE */
860
861 #ifdef BTUARTCONSOLE
862 #ifdef KGDB
863 if (0 == strcmp(kgdb_devname, "btuart")) {
864 /* port is reserved for kgdb */
865 } else
866 #endif
867 if (0 == comcnattach(&pxa2x0_a4x_bs_tag, PXA2X0_BTUART_BASE,
868 comcnspeed, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comcnmode)) {
869 ioreg_write(VIPER_CLKMAN_VBASE+CLKMAN_CKEN,
870 ckenreg|CKEN_BTUART);
871 return;
872 }
873 #endif /* BTUARTCONSOLE */
874
875 /* no console, guess we're flying blind */
876
877 #endif /* NCOM */
878
879 }
880
881 #ifdef KGDB
882 void
kgdb_port_init(void)883 kgdb_port_init(void)
884 {
885 #if (NCOM > 0) && defined(COM_PXA2X0)
886 paddr_t paddr = 0;
887 uint32_t ckenreg = ioreg_read(VIPER_CLKMAN_VBASE+CLKMAN_CKEN);
888
889 if (0 == strcmp(kgdb_devname, "ffuart")) {
890 paddr = PXA2X0_FFUART_BASE;
891 ckenreg |= CKEN_FFUART;
892 }
893 else if (0 == strcmp(kgdb_devname, "btuart")) {
894 paddr = PXA2X0_BTUART_BASE;
895 ckenreg |= CKEN_BTUART;
896 }
897
898 if (paddr &&
899 0 == com_kgdb_attach(&pxa2x0_a4x_bs_tag, paddr,
900 kgdb_rate, PXA2X0_COM_FREQ, COM_TYPE_PXA2x0, comkgdbmode)) {
901
902 ioreg_write(VIPER_CLKMAN_VBASE+CLKMAN_CKEN, ckenreg);
903 }
904 #endif
905 }
906 #endif
907