1 /* $NetBSD: hdlg_machdep.c,v 1.35 2023/10/12 11:33:38 skrll Exp $ */
2
3 /*
4 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Jason R. Thorpe and Steve C. Woodford 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) 1997,1998 Mark Brinicombe.
40 * Copyright (c) 1997,1998 Causality Limited.
41 * All rights reserved.
42 *
43 * Redistribution and use in source and binary forms, with or without
44 * modification, are permitted provided that the following conditions
45 * are met:
46 * 1. Redistributions of source code must retain the above copyright
47 * notice, this list of conditions and the following disclaimer.
48 * 2. Redistributions in binary form must reproduce the above copyright
49 * notice, this list of conditions and the following disclaimer in the
50 * documentation and/or other materials provided with the distribution.
51 * 3. All advertising materials mentioning features or use of this software
52 * must display the following acknowledgement:
53 * This product includes software developed by Mark Brinicombe
54 * for the NetBSD Project.
55 * 4. The name of the company nor the name of the author may be used to
56 * endorse or promote products derived from this software without specific
57 * prior written permission.
58 *
59 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
60 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
61 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
62 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
63 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
64 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
65 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
69 * SUCH DAMAGE.
70 *
71 * Machine dependent functions for kernel setup for GigaLANDISK
72 * using RedBoot firmware.
73 */
74
75 #include <sys/cdefs.h>
76 __KERNEL_RCSID(0, "$NetBSD: hdlg_machdep.c,v 1.35 2023/10/12 11:33:38 skrll Exp $");
77
78 #include "opt_arm_debug.h"
79 #include "opt_console.h"
80 #include "opt_ddb.h"
81 #include "opt_kgdb.h"
82
83 #include <sys/param.h>
84 #include <sys/device.h>
85 #include <sys/systm.h>
86 #include <sys/kernel.h>
87 #include <sys/exec.h>
88 #include <sys/proc.h>
89 #include <sys/msgbuf.h>
90 #include <sys/reboot.h>
91 #include <sys/termios.h>
92 #include <sys/ksyms.h>
93 #include <sys/bus.h>
94 #include <sys/cpu.h>
95
96 #include <uvm/uvm_extern.h>
97
98 #include <dev/cons.h>
99
100 #include <machine/db_machdep.h>
101 #include <ddb/db_sym.h>
102 #include <ddb/db_extern.h>
103
104 #include <machine/bootconfig.h>
105 #include <arm/locore.h>
106 #include <arm/undefined.h>
107
108 #include <arm/arm32/machdep.h>
109
110 #include <arm/xscale/i80321reg.h>
111 #include <arm/xscale/i80321var.h>
112
113 #include <dev/pci/ppbreg.h>
114
115 #include <evbarm/hdl_g/hdlgreg.h>
116 #include <evbarm/hdl_g/hdlgvar.h>
117 #include <evbarm/hdl_g/obiovar.h>
118
119 #include "ksyms.h"
120
121 /* Kernel text starts 2MB in from the bottom of the kernel address space. */
122 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000)
123 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000)
124
125 /*
126 * The range 0xc1000000 - 0xccffffff is available for kernel VM space
127 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff
128 */
129 #define KERNEL_VM_SIZE 0x0C000000
130
131 BootConfig bootconfig; /* Boot config storage */
132 char *boot_args = NULL;
133 char *boot_file = NULL;
134
135 vaddr_t physical_start;
136 vaddr_t physical_freestart;
137 vaddr_t physical_freeend;
138 vaddr_t physical_end;
139 u_int free_pages;
140
141 /*int debug_flags;*/
142 #ifndef PMAP_STATIC_L1S
143 int max_processes = 64; /* Default number */
144 #endif /* !PMAP_STATIC_L1S */
145
146 pv_addr_t minidataclean;
147
148 paddr_t msgbufphys;
149
150 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */
151
152 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */
153 #define KERNEL_PT_KERNEL_NUM 4
154
155 /* L2 table for mapping i80321 */
156 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM)
157
158 /* L2 tables for mapping kernel VM */
159 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1)
160 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */
161 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
162
163 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS];
164
165 /* Prototypes */
166 void consinit(void);
167
168 /* Static device mappings. */
169 static const struct pmap_devmap hdlg_devmap[] = {
170 /*
171 * Map the on-board devices VA == PA so that we can access them
172 * with the MMU on or off.
173 */
174 DEVMAP_ENTRY(
175 HDLG_OBIO_BASE,
176 HDLG_OBIO_BASE,
177 HDLG_OBIO_SIZE
178 ),
179
180 DEVMAP_ENTRY(
181 HDLG_IOW_VBASE,
182 VERDE_OUT_XLATE_IO_WIN0_BASE,
183 VERDE_OUT_XLATE_IO_WIN_SIZE
184 ),
185
186 DEVMAP_ENTRY(
187 HDLG_80321_VBASE,
188 VERDE_PMMR_BASE,
189 VERDE_PMMR_SIZE
190 ),
191
192 DEVMAP_ENTRY_END
193 };
194
195 static void
hardclock_hook(void)196 hardclock_hook(void)
197 {
198
199 /* Nothing to do */
200 }
201
202 /*
203 * vaddr_t initarm(...)
204 *
205 * Initial entry point on startup. This gets called before main() is
206 * entered.
207 * It should be responsible for setting up everything that must be
208 * in place when main is called.
209 * This includes
210 * Taking a copy of the boot configuration structure.
211 * Initialising the physical console so characters can be printed.
212 * Setting up page tables for the kernel
213 * Relocating the kernel to the bottom of physical memory
214 */
215 vaddr_t
initarm(void * arg)216 initarm(void *arg)
217 {
218 int loop;
219 int loop1;
220 u_int l1pagetable;
221 paddr_t memstart;
222 psize_t memsize;
223
224 /* Calibrate the delay loop. */
225 i80321_calibrate_delay();
226 i80321_hardclock_hook = hardclock_hook;
227
228 /*
229 * Since we map the on-board devices VA==PA, and the kernel
230 * is running VA==PA, it's possible for us to initialize
231 * the console now.
232 */
233 consinit();
234
235 #ifdef VERBOSE_INIT_ARM
236 /* Talk to the user */
237 printf("\nNetBSD/evbarm (HDL-G) booting ...\n");
238 #endif
239
240 /*
241 * Heads up ... Setup the CPU / MMU / TLB functions
242 */
243 if (set_cpufuncs())
244 panic("CPU not recognized!");
245
246 /*
247 * We are currently running with the MMU enabled and the
248 * entire address space mapped VA==PA, except for the
249 * first 64M of RAM is also double-mapped at 0xc0000000.
250 * There is an L1 page table at 0xa0004000.
251 */
252
253 /*
254 * Fetch the SDRAM start/size from the i80321 SDRAM configuration
255 * registers.
256 */
257 i80321_sdram_bounds(&obio_bs_tag, VERDE_PMMR_BASE + VERDE_MCU_BASE,
258 &memstart, &memsize);
259
260 #ifdef VERBOSE_INIT_ARM
261 printf("initarm: Configuring system ...\n");
262 #endif
263
264 /* Fake bootconfig structure for the benefit of pmap.c */
265 /* XXX must make the memory description h/w independent */
266 bootconfig.dramblocks = 1;
267 bootconfig.dram[0].address = memstart;
268 bootconfig.dram[0].pages = memsize / PAGE_SIZE;
269
270 /*
271 * Set up the variables that define the availability of
272 * physical memory. For now, we're going to set
273 * physical_freestart to 0xa0200000 (where the kernel
274 * was loaded), and allocate the memory we need downwards.
275 * If we get too close to the L1 table that we set up, we
276 * will panic. We will update physical_freestart and
277 * physical_freeend later to reflect what pmap_bootstrap()
278 * wants to see.
279 *
280 * XXX pmap_bootstrap() needs an enema.
281 */
282 physical_start = bootconfig.dram[0].address;
283 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE);
284
285 physical_freestart = 0xa0009000UL;
286 physical_freeend = 0xa0200000UL;
287
288 physmem = (physical_end - physical_start) / PAGE_SIZE;
289
290 #ifdef VERBOSE_INIT_ARM
291 /* Tell the user about the memory */
292 printf("physmemory: %ld pages at 0x%08lx -> 0x%08lx\n", physmem,
293 physical_start, physical_end - 1);
294 #endif
295
296 /*
297 * Okay, the kernel starts 2MB in from the bottom of physical
298 * memory. We are going to allocate our bootstrap pages downwards
299 * from there.
300 *
301 * We need to allocate some fixed page tables to get the kernel
302 * going. We allocate one page directory and a number of page
303 * tables and store the physical addresses in the kernel_pt_table
304 * array.
305 *
306 * The kernel page directory must be on a 16K boundary. The page
307 * tables must be on 4K boundaries. What we do is allocate the
308 * page directory on the first 16K boundary that we encounter, and
309 * the page tables on 4K boundaries otherwise. Since we allocate
310 * at least 3 L2 page tables, we are guaranteed to encounter at
311 * least one 16K aligned region.
312 */
313
314 #ifdef VERBOSE_INIT_ARM
315 printf("Allocating page tables\n");
316 #endif
317
318 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;
319
320 #ifdef VERBOSE_INIT_ARM
321 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n",
322 physical_freestart, free_pages, free_pages);
323 #endif
324
325 /* Define a macro to simplify memory allocation */
326 #define valloc_pages(var, np) \
327 alloc_pages((var).pv_pa, (np)); \
328 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;
329
330 #define alloc_pages(var, np) \
331 physical_freeend -= ((np) * PAGE_SIZE); \
332 if (physical_freeend < physical_freestart) \
333 panic("initarm: out of memory"); \
334 (var) = physical_freeend; \
335 free_pages -= (np); \
336 memset((char *)(var), 0, ((np) * PAGE_SIZE));
337
338 loop1 = 0;
339 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
340 /* Are we 16KB aligned for an L1 ? */
341 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
342 && kernel_l1pt.pv_pa == 0) {
343 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
344 } else {
345 valloc_pages(kernel_pt_table[loop1],
346 L2_TABLE_SIZE / PAGE_SIZE);
347 ++loop1;
348 }
349 }
350
351 /* This should never be able to happen but better confirm that. */
352 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
353 panic("initarm: Failed to align the kernel page directory");
354
355 /*
356 * Allocate a page for the system page mapped to V0x00000000
357 * This page will just contain the system vectors and can be
358 * shared by all processes.
359 */
360 alloc_pages(systempage.pv_pa, 1);
361
362 /* Allocate stacks for all modes */
363 valloc_pages(irqstack, IRQ_STACK_SIZE);
364 valloc_pages(abtstack, ABT_STACK_SIZE);
365 valloc_pages(undstack, UND_STACK_SIZE);
366 valloc_pages(kernelstack, UPAGES);
367
368 /* Allocate enough pages for cleaning the Mini-Data cache. */
369 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE);
370 valloc_pages(minidataclean, 1);
371
372 #ifdef VERBOSE_INIT_ARM
373 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
374 irqstack.pv_va);
375 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
376 abtstack.pv_va);
377 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
378 undstack.pv_va);
379 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
380 kernelstack.pv_va);
381 #endif
382
383 /*
384 * XXX Defer this to later so that we can reclaim the memory
385 * XXX used by the RedBoot page tables.
386 */
387 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);
388
389 /*
390 * Ok we have allocated physical pages for the primary kernel
391 * page tables
392 */
393
394 #ifdef VERBOSE_INIT_ARM
395 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
396 #endif
397
398 /*
399 * Now we start construction of the L1 page table
400 * We start by mapping the L2 page tables into the L1.
401 * This means that we can replace L1 mappings later on if necessary
402 */
403 l1pagetable = kernel_l1pt.pv_pa;
404
405 /* Map the L2 pages tables in the L1 page table */
406 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1),
407 &kernel_pt_table[KERNEL_PT_SYS]);
408 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
409 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
410 &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
411 pmap_link_l2pt(l1pagetable, HDLG_IOPXS_VBASE,
412 &kernel_pt_table[KERNEL_PT_IOPXS]);
413 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
414 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
415 &kernel_pt_table[KERNEL_PT_VMDATA + loop]);
416
417 /* update the top of the kernel VM */
418 pmap_curmaxkvaddr =
419 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);
420
421 #ifdef VERBOSE_INIT_ARM
422 printf("Mapping kernel\n");
423 #endif
424
425 /* Now we fill in the L2 pagetable for the kernel static code/data */
426 {
427 extern char etext[], _end[];
428 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE;
429 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE;
430 u_int logical;
431
432 textsize = (textsize + PGOFSET) & ~PGOFSET;
433 totalsize = (totalsize + PGOFSET) & ~PGOFSET;
434
435 logical = 0x00200000; /* offset of kernel in RAM */
436
437 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
438 physical_start + logical, textsize,
439 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
440 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
441 physical_start + logical, totalsize - textsize,
442 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
443 }
444
445 #ifdef VERBOSE_INIT_ARM
446 printf("Constructing L2 page tables\n");
447 #endif
448
449 /* Map the stack pages */
450 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
451 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
452 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
453 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
454 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
455 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
456 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
457 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
458
459 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
460 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
461
462 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
463 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
464 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
465 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
466 }
467
468 /* Map the Mini-Data cache clean area. */
469 xscale_setup_minidata(l1pagetable, minidataclean.pv_va,
470 minidataclean.pv_pa);
471
472 /* Map the vector page. */
473 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
474 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
475
476 /* Map the statically mapped devices. */
477 pmap_devmap_bootstrap(l1pagetable, hdlg_devmap);
478
479 /*
480 * Give the XScale global cache clean code an appropriately
481 * sized chunk of unmapped VA space starting at 0xff000000
482 * (our device mappings end before this address).
483 */
484 xscale_cache_clean_addr = 0xff000000U;
485
486 /*
487 * Now we have the real page tables in place so we can switch to them.
488 * Once this is done we will be running with the REAL kernel page
489 * tables.
490 */
491
492 /*
493 * Update the physical_freestart/physical_freeend/free_pages
494 * variables.
495 */
496 {
497 extern char _end[];
498
499 physical_freestart = physical_start +
500 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) -
501 KERNEL_BASE);
502 physical_freeend = physical_end;
503 free_pages =
504 (physical_freeend - physical_freestart) / PAGE_SIZE;
505 }
506
507 /* Switch tables */
508 #ifdef VERBOSE_INIT_ARM
509 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
510 physical_freestart, free_pages, free_pages);
511 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa);
512 #endif
513 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
514 cpu_setttb(kernel_l1pt.pv_pa, true);
515 cpu_tlb_flushID();
516 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
517
518 /*
519 * Moved from cpu_startup() as data_abort_handler() references
520 * this during uvm init
521 */
522 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);
523
524 #ifdef VERBOSE_INIT_ARM
525 printf("done!\n");
526 #endif
527
528 #ifdef VERBOSE_INIT_ARM
529 printf("bootstrap done.\n");
530 #endif
531
532 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
533
534 /*
535 * Pages were allocated during the secondary bootstrap for the
536 * stacks for different CPU modes.
537 * We must now set the r13 registers in the different CPU modes to
538 * point to these stacks.
539 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
540 * of the stack memory.
541 */
542 #ifdef VERBOSE_INIT_ARM
543 printf("init subsystems: stacks ");
544 #endif
545
546 set_stackptr(PSR_IRQ32_MODE,
547 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
548 set_stackptr(PSR_ABT32_MODE,
549 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
550 set_stackptr(PSR_UND32_MODE,
551 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
552
553 /*
554 * Well we should set a data abort handler.
555 * Once things get going this will change as we will need a proper
556 * handler.
557 * Until then we will use a handler that just panics but tells us
558 * why.
559 * Initialisation of the vectors will just panic on a data abort.
560 * This just fills in a slightly better one.
561 */
562 #ifdef VERBOSE_INIT_ARM
563 printf("vectors ");
564 #endif
565 data_abort_handler_address = (u_int)data_abort_handler;
566 prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
567 undefined_handler_address = (u_int)undefinedinstruction_bounce;
568
569 /* Initialise the undefined instruction handlers */
570 #ifdef VERBOSE_INIT_ARM
571 printf("undefined ");
572 #endif
573 undefined_init();
574
575 /* Load memory into UVM. */
576 #ifdef VERBOSE_INIT_ARM
577 printf("page ");
578 #endif
579 uvm_md_init();
580 uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
581 atop(physical_freestart), atop(physical_freeend),
582 VM_FREELIST_DEFAULT);
583
584 /* Boot strap pmap telling it where managed kernel virtual memory is */
585 #ifdef VERBOSE_INIT_ARM
586 printf("pmap ");
587 #endif
588 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);
589
590 /* Setup the IRQ system */
591 #ifdef VERBOSE_INIT_ARM
592 printf("irq ");
593 #endif
594 i80321_intr_init();
595
596 #ifdef VERBOSE_INIT_ARM
597 printf("done.\n");
598 #endif
599
600 #ifdef BOOTHOWTO
601 boothowto = BOOTHOWTO;
602 #endif
603
604 #ifdef DDB
605 db_machine_init();
606 if (boothowto & RB_KDB)
607 Debugger();
608 #endif
609
610 /* We return the new stack pointer address */
611 return kernelstack.pv_va + USPACE_SVC_STACK_TOP;
612 }
613
614 /*
615 * void cpu_reboot(int howto, char *bootstr)
616 *
617 * Reboots the system
618 *
619 * Deal with any syncing, unmounting, dumping and shutdown hooks,
620 * then reset the CPU.
621 */
622 void
cpu_reboot(int howto,char * bootstr)623 cpu_reboot(int howto, char *bootstr)
624 {
625
626 /*
627 * If we are still cold then hit the air brakes
628 * and crash to earth fast
629 */
630 if (cold) {
631 *(volatile uint8_t *)HDLG_LEDCTRL |= LEDCTRL_STAT_RED;
632 howto |= RB_HALT;
633 goto haltsys;
634 }
635
636 /* Disable console buffering */
637
638 /*
639 * If RB_NOSYNC was not specified sync the discs.
640 * Note: Unless cold is set to 1 here, syslogd will die during the
641 * unmount. It looks like syslogd is getting woken up only to find
642 * that it cannot page part of the binary in as the filesystem has
643 * been unmounted.
644 */
645 if ((howto & RB_NOSYNC) == 0) {
646 bootsync();
647 /*resettodr();*/
648 }
649
650 /* wait 1s */
651 delay(1 * 1000 * 1000);
652
653 /* Say NO to interrupts */
654 splhigh();
655
656 /* Do a dump if requested. */
657 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) {
658 dumpsys();
659 }
660
661 haltsys:
662 /* Run any shutdown hooks */
663 doshutdownhooks();
664
665 pmf_system_shutdown(boothowto);
666
667 /* Make sure IRQ's are disabled */
668 IRQdisable;
669
670 if (howto & RB_HALT) {
671 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_POWOFF;
672 delay(3 * 1000 * 1000); /* wait 3s */
673
674 printf("SHUTDOWN FAILED!\n");
675 printf("The operating system has halted.\n");
676 printf("Please press any key to reboot.\n\n");
677 cngetc();
678 }
679
680 printf("rebooting...\n\r");
681
682 (void)disable_interrupts(I32_bit|F32_bit);
683 cpu_idcache_wbinv_all();
684 cpu_drain_writebuf();
685
686 *(volatile uint8_t *)HDLG_PWRMNG = PWRMNG_RESET;
687 delay(1 * 1000 * 1000); /* wait 1s */
688
689 /* ...and if that didn't work, just croak. */
690 printf("RESET FAILED!\n");
691 for (;;) {
692 continue;
693 }
694 }
695
696 /*
697 * console
698 */
699 #include "com.h"
700 #if NCOM > 0
701 #include <dev/ic/comreg.h>
702 #include <dev/ic/comvar.h>
703 #endif
704
705 /*
706 * Define the default console speed for the board. This is generally
707 * what the firmware provided with the board defaults to.
708 */
709 #ifndef CONSPEED
710 #define CONSPEED B115200
711 #endif /* ! CONSPEED */
712
713 #ifndef CONUNIT
714 #define CONUNIT 0
715 #endif
716
717 #ifndef CONMODE
718 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
719 #endif
720
721 int comcnspeed = CONSPEED;
722 int comcnmode = CONMODE;
723 int comcnunit = CONUNIT;
724
725 #if KGDB
726 #ifndef KGDB_DEVNAME
727 #error Must define KGDB_DEVNAME
728 #endif
729 const char kgdb_devname[] = KGDB_DEVNAME;
730
731 #ifndef KGDB_DEVADDR
732 #error Must define KGDB_DEVADDR
733 #endif
734 unsigned long kgdb_devaddr = KGDB_DEVADDR;
735
736 #ifndef KGDB_DEVRATE
737 #define KGDB_DEVRATE CONSPEED
738 #endif
739 int kgdb_devrate = KGDB_DEVRATE;
740
741 #ifndef KGDB_DEVMODE
742 #define KGDB_DEVMODE CONMODE
743 #endif
744 int kgdb_devmode = KGDB_DEVMODE;
745 #endif /* KGDB */
746
747 void
consinit(void)748 consinit(void)
749 {
750 static const bus_addr_t comcnaddrs[] = {
751 HDLG_UART1, /* com0 */
752 };
753 static int consinit_called;
754
755 if (consinit_called)
756 return;
757 consinit_called = 1;
758
759 /*
760 * Console devices are mapped VA==PA. Our devmap reflects
761 * this, so register it now so drivers can map the console
762 * device.
763 */
764 pmap_devmap_register(hdlg_devmap);
765
766 #if NCOM > 0
767 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed,
768 COM_FREQ, COM_TYPE_NORMAL, comcnmode))
769 panic("can't init serial console @%lx", comcnaddrs[comcnunit]);
770 #else
771 panic("serial console @%lx not configured", comcnaddrs[comcnunit]);
772 #endif
773 #if KGDB
774 #if NCOM > 0
775 if (strcmp(kgdb_devname, "com") == 0) {
776 com_kgdb_attach(&obio_bs_tag, kgdb_devaddr, kgdb_devrate,
777 COM_FREQ, COM_TYPE_NORMAL, kgdb_devmode);
778 }
779 #endif /* NCOM > 0 */
780 #endif /* KGDB */
781 }
782