1 /* $NetBSD: iq80310_machdep.c,v 1.97 2024/02/20 23:36:02 andvar Exp $ */
2
3 /*
4 * Copyright (c) 2001, 2002, 2003 Wasabi Systems, Inc.
5 * All rights reserved.
6 *
7 * Written by Jason R. Thorpe 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 Intel IQ80310 evaluation
72 * boards using RedBoot firmware.
73 */
74
75 #include <sys/cdefs.h>
76 __KERNEL_RCSID(0, "$NetBSD: iq80310_machdep.c,v 1.97 2024/02/20 23:36:02 andvar Exp $");
77
78 #include "opt_arm_debug.h"
79 #include "opt_console.h"
80 #include "opt_ddb.h"
81
82 #include <sys/param.h>
83 #include <sys/device.h>
84 #include <sys/systm.h>
85 #include <sys/kernel.h>
86 #include <sys/exec.h>
87 #include <sys/proc.h>
88 #include <sys/msgbuf.h>
89 #include <sys/reboot.h>
90 #include <sys/termios.h>
91 #include <sys/ksyms.h>
92 #include <sys/bus.h>
93 #include <sys/cpu.h>
94
95 #include <uvm/uvm_extern.h>
96
97 #include <dev/cons.h>
98
99 #include <machine/db_machdep.h>
100 #include <ddb/db_sym.h>
101 #include <ddb/db_extern.h>
102
103 #include <machine/bootconfig.h>
104 #include <arm/locore.h>
105 #include <arm/undefined.h>
106
107 #include <arm/arm32/machdep.h>
108
109 #include <arm/xscale/i80312reg.h>
110 #include <arm/xscale/i80312var.h>
111
112 #include <dev/pci/ppbreg.h>
113
114 #include <evbarm/iq80310/iq80310reg.h>
115 #include <evbarm/iq80310/iq80310var.h>
116 #include <evbarm/iq80310/obiovar.h>
117
118 #include "ksyms.h"
119
120 /* Kernel text starts 2MB in from the bottom of the kernel address space. */
121 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000)
122 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000)
123
124 /*
125 * The range 0xc1000000 - 0xccffffff is available for kernel VM space
126 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff
127 */
128 #define KERNEL_VM_SIZE 0x0C000000
129
130 BootConfig bootconfig; /* Boot config storage */
131 char *boot_args = NULL;
132 char *boot_file = NULL;
133
134 vaddr_t physical_start;
135 vaddr_t physical_freestart;
136 vaddr_t physical_freeend;
137 vaddr_t physical_end;
138 u_int free_pages;
139
140 /*int debug_flags;*/
141 #ifndef PMAP_STATIC_L1S
142 int max_processes = 64; /* Default number */
143 #endif /* !PMAP_STATIC_L1S */
144
145 pv_addr_t minidataclean;
146
147 paddr_t msgbufphys;
148
149 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */
150
151 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */
152 #define KERNEL_PT_KERNEL_NUM 4
153
154 /* L2 table for mapping i80312 */
155 #define KERNEL_PT_IOPXS (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM)
156
157 /* L2 tables for mapping kernel VM */
158 #define KERNEL_PT_VMDATA (KERNEL_PT_IOPXS + 1)
159 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */
160 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
161
162 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS];
163
164 /* Prototypes */
165
166 void consinit(void);
167
168 #include "com.h"
169 #if NCOM > 0
170 #include <dev/ic/comreg.h>
171 #include <dev/ic/comvar.h>
172 #endif
173
174 /*
175 * Define the default console speed for the board. This is generally
176 * what the firmware provided with the board defaults to.
177 */
178 #ifndef CONSPEED
179 #define CONSPEED B115200
180 #endif /* ! CONSPEED */
181
182 #ifndef CONUNIT
183 #define CONUNIT 0
184 #endif
185
186 #ifndef CONMODE
187 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
188 #endif
189
190 int comcnspeed = CONSPEED;
191 int comcnmode = CONMODE;
192 int comcnunit = CONUNIT;
193
194 /*
195 * void cpu_reboot(int howto, char *bootstr)
196 *
197 * Reboots the system
198 *
199 * Deal with any syncing, unmounting, dumping and shutdown hooks,
200 * then reset the CPU.
201 */
202 void
cpu_reboot(int howto,char * bootstr)203 cpu_reboot(int howto, char *bootstr)
204 {
205
206 /*
207 * If we are still cold then hit the air brakes
208 * and crash to earth fast
209 */
210 if (cold) {
211 doshutdownhooks();
212 pmf_system_shutdown(boothowto);
213 printf("The operating system has halted.\n");
214 printf("Please press any key to reboot.\n\n");
215 cngetc();
216 printf("rebooting...\n");
217 cpu_reset();
218 /*NOTREACHED*/
219 }
220
221 /* Disable console buffering */
222
223 /*
224 * If RB_NOSYNC was not specified sync the discs.
225 * Note: Unless cold is set to 1 here, syslogd will die during the
226 * unmount. It looks like syslogd is getting woken up only to find
227 * that it cannot page part of the binary in as the filesystem has
228 * been unmounted.
229 */
230 if (!(howto & RB_NOSYNC))
231 bootsync();
232
233 /* Say NO to interrupts */
234 splhigh();
235
236 /* Do a dump if requested. */
237 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
238 dumpsys();
239
240 /* Run any shutdown hooks */
241 doshutdownhooks();
242
243 pmf_system_shutdown(boothowto);
244
245 /* Make sure IRQ's are disabled */
246 IRQdisable;
247
248 if (howto & RB_HALT) {
249 iq80310_7seg('.', '.');
250 printf("The operating system has halted.\n");
251 printf("Please press any key to reboot.\n\n");
252 cngetc();
253 }
254
255 printf("rebooting...\n");
256 cpu_reset();
257 /*NOTREACHED*/
258 }
259
260 /* Static device mappings. */
261 static const struct pmap_devmap iq80310_devmap[] = {
262 /*
263 * Map the on-board devices VA == PA so that we can access them
264 * with the MMU on or off.
265 */
266 DEVMAP_ENTRY(
267 IQ80310_OBIO_BASE,
268 IQ80310_OBIO_BASE,
269 IQ80310_OBIO_SIZE
270 ),
271 DEVMAP_ENTRY(
272 IQ80310_PIOW_VBASE,
273 I80312_PCI_XLATE_PIOW_BASE,
274 I80312_PCI_XLATE_IOSIZE
275 ),
276 DEVMAP_ENTRY(
277 IQ80310_SIOW_VBASE,
278 I80312_PCI_XLATE_SIOW_BASE,
279 I80312_PCI_XLATE_IOSIZE
280 ),
281 DEVMAP_ENTRY(
282 IQ80310_80312_VBASE,
283 I80312_PMMR_BASE,
284 I80312_PMMR_SIZE
285 ),
286
287 DEVMAP_ENTRY_END
288 };
289
290 /*
291 * vaddr_t initarm(...)
292 *
293 * Initial entry point on startup. This gets called before main() is
294 * entered.
295 * It should be responsible for setting up everything that must be
296 * in place when main is called.
297 * This includes
298 * Taking a copy of the boot configuration structure.
299 * Initialising the physical console so characters can be printed.
300 * Setting up page tables for the kernel
301 * Relocating the kernel to the bottom of physical memory
302 */
303 vaddr_t
initarm(void * arg)304 initarm(void *arg)
305 {
306 int loop;
307 int loop1;
308 u_int l1pagetable;
309 paddr_t memstart;
310 psize_t memsize;
311
312 /*
313 * Clear out the 7-segment display. Whee, the first visual
314 * indication that we're running kernel code.
315 */
316 iq80310_7seg(' ', ' ');
317
318 /*
319 * Heads up ... Setup the CPU / MMU / TLB functions
320 */
321 if (set_cpufuncs())
322 panic("CPU not recognized!");
323
324 /* Calibrate the delay loop. */
325 iq80310_calibrate_delay();
326
327 /*
328 * Since we map the on-board devices VA==PA, and the kernel
329 * is running VA==PA, it's possible for us to initialize
330 * the console now.
331 */
332 consinit();
333
334 #ifdef VERBOSE_INIT_ARM
335 /* Talk to the user */
336 printf("\nNetBSD/evbarm (IQ80310) booting ...\n");
337 #endif
338
339 /*
340 * Reset the secondary PCI bus. RedBoot doesn't stop devices
341 * on the PCI bus before handing us control, so we have to
342 * do this.
343 *
344 * XXX This is arguably a bug in RedBoot, and doing this reset
345 * XXX could be problematic in the future if we encounter an
346 * XXX application where the PPB in the i80312 is used as a
347 * XXX PPB.
348 */
349 {
350 uint32_t reg;
351
352 #ifdef VERBOSE_INIT_ARM
353 printf("Resetting secondary PCI bus...\n");
354 #endif
355 reg = bus_space_read_4(&obio_bs_tag,
356 I80312_PMMR_BASE + I80312_PPB_BASE, PCI_BRIDGE_CONTROL_REG);
357 bus_space_write_4(&obio_bs_tag,
358 I80312_PMMR_BASE + I80312_PPB_BASE, PCI_BRIDGE_CONTROL_REG,
359 reg | PCI_BRIDGE_CONTROL_SECBR);
360 delay(10 * 1000); /* 10ms enough? */
361 bus_space_write_4(&obio_bs_tag,
362 I80312_PMMR_BASE + I80312_PPB_BASE, PCI_BRIDGE_CONTROL_REG,
363 reg);
364 }
365
366 /*
367 * We are currently running with the MMU enabled and the
368 * entire address space mapped VA==PA, except for the
369 * first 64M of RAM is also double-mapped at 0xc0000000.
370 * There is an L1 page table at 0xa0004000.
371 */
372
373 /*
374 * Fetch the SDRAM start/size from the i80312 SDRAM configuration
375 * registers.
376 */
377 i80312_sdram_bounds(&obio_bs_tag, I80312_PMMR_BASE + I80312_MEM_BASE,
378 &memstart, &memsize);
379
380 #ifdef VERBOSE_INIT_ARM
381 printf("initarm: Configuring system ...\n");
382 #endif
383
384 /* Fake bootconfig structure for the benefit of pmap.c */
385 /* XXX must make the memory description h/w independent */
386 bootconfig.dramblocks = 1;
387 bootconfig.dram[0].address = memstart;
388 bootconfig.dram[0].pages = memsize / PAGE_SIZE;
389
390 /*
391 * Set up the variables that define the availability of
392 * physical memory. For now, we're going to set
393 * physical_freestart to 0xa0200000 (where the kernel
394 * was loaded), and allocate the memory we need downwards.
395 * If we get too close to the L1 table that we set up, we
396 * will panic. We will update physical_freestart and
397 * physical_freeend later to reflect what pmap_bootstrap()
398 * wants to see.
399 *
400 * XXX pmap_bootstrap() needs an enema.
401 */
402 physical_start = bootconfig.dram[0].address;
403 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE);
404
405 physical_freestart = 0xa0009000UL;
406 physical_freeend = 0xa0200000UL;
407
408 physmem = (physical_end - physical_start) / PAGE_SIZE;
409
410 #ifdef VERBOSE_INIT_ARM
411 /* Tell the user about the memory */
412 printf("physmemory: 0x%"PRIxPSIZE" pages at 0x%08lx -> 0x%08lx\n", physmem,
413 physical_start, physical_end - 1);
414 #endif
415
416 /*
417 * Okay, the kernel starts 2MB in from the bottom of physical
418 * memory. We are going to allocate our bootstrap pages downwards
419 * from there.
420 *
421 * We need to allocate some fixed page tables to get the kernel
422 * going. We allocate one page directory and a number of page
423 * tables and store the physical addresses in the kernel_pt_table
424 * array.
425 *
426 * The kernel page directory must be on a 16K boundary. The page
427 * tables must be on 4K boundaries. What we do is allocate the
428 * page directory on the first 16K boundary that we encounter, and
429 * the page tables on 4K boundaries otherwise. Since we allocate
430 * at least 3 L2 page tables, we are guaranteed to encounter at
431 * least one 16K aligned region.
432 */
433
434 #ifdef VERBOSE_INIT_ARM
435 printf("Allocating page tables\n");
436 #endif
437
438 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;
439
440 #ifdef VERBOSE_INIT_ARM
441 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n",
442 physical_freestart, free_pages, free_pages);
443 #endif
444
445 /* Define a macro to simplify memory allocation */
446 #define valloc_pages(var, np) \
447 alloc_pages((var).pv_pa, (np)); \
448 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;
449
450 #define alloc_pages(var, np) \
451 physical_freeend -= ((np) * PAGE_SIZE); \
452 if (physical_freeend < physical_freestart) \
453 panic("initarm: out of memory"); \
454 (var) = physical_freeend; \
455 free_pages -= (np); \
456 memset((char *)(var), 0, ((np) * PAGE_SIZE));
457
458 loop1 = 0;
459 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
460 /* Are we 16KB aligned for an L1 ? */
461 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
462 && kernel_l1pt.pv_pa == 0) {
463 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
464 } else {
465 valloc_pages(kernel_pt_table[loop1],
466 L2_TABLE_SIZE / PAGE_SIZE);
467 ++loop1;
468 }
469 }
470
471 /* This should never be able to happen but better confirm that. */
472 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
473 panic("initarm: Failed to align the kernel page directory");
474
475 /*
476 * Allocate a page for the system page mapped to V0x00000000
477 * This page will just contain the system vectors and can be
478 * shared by all processes.
479 */
480 alloc_pages(systempage.pv_pa, 1);
481
482 /* Allocate stacks for all modes */
483 valloc_pages(irqstack, IRQ_STACK_SIZE);
484 valloc_pages(abtstack, ABT_STACK_SIZE);
485 valloc_pages(undstack, UND_STACK_SIZE);
486 valloc_pages(kernelstack, UPAGES);
487
488 /* Allocate enough pages for cleaning the Mini-Data cache. */
489 KASSERT(xscale_minidata_clean_size <= PAGE_SIZE);
490 valloc_pages(minidataclean, 1);
491
492 #ifdef VERBOSE_INIT_ARM
493 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
494 irqstack.pv_va);
495 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
496 abtstack.pv_va);
497 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
498 undstack.pv_va);
499 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
500 kernelstack.pv_va);
501 #endif
502
503 /*
504 * XXX Defer this to later so that we can reclaim the memory
505 * XXX used by the RedBoot page tables.
506 */
507 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);
508
509 /*
510 * Ok we have allocated physical pages for the primary kernel
511 * page tables
512 */
513
514 #ifdef VERBOSE_INIT_ARM
515 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
516 #endif
517
518 /*
519 * Now we start construction of the L1 page table
520 * We start by mapping the L2 page tables into the L1.
521 * This means that we can replace L1 mappings later on if necessary
522 */
523 l1pagetable = kernel_l1pt.pv_pa;
524
525 /* Map the L2 pages tables in the L1 page table */
526 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1),
527 &kernel_pt_table[KERNEL_PT_SYS]);
528 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
529 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
530 &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
531 pmap_link_l2pt(l1pagetable, IQ80310_IOPXS_VBASE,
532 &kernel_pt_table[KERNEL_PT_IOPXS]);
533 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
534 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
535 &kernel_pt_table[KERNEL_PT_VMDATA + loop]);
536
537 /* update the top of the kernel VM */
538 pmap_curmaxkvaddr =
539 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);
540
541 #ifdef VERBOSE_INIT_ARM
542 printf("Mapping kernel\n");
543 #endif
544
545 /* Now we fill in the L2 pagetable for the kernel static code/data */
546 {
547 extern char etext[], _end[];
548 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE;
549 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE;
550 u_int logical;
551
552 textsize = (textsize + PGOFSET) & ~PGOFSET;
553 totalsize = (totalsize + PGOFSET) & ~PGOFSET;
554
555 logical = 0x00200000; /* offset of kernel in RAM */
556
557 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
558 physical_start + logical, textsize,
559 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
560 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
561 physical_start + logical, totalsize - textsize,
562 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
563 }
564
565 #ifdef VERBOSE_INIT_ARM
566 printf("Constructing L2 page tables\n");
567 #endif
568
569 /* Map the stack pages */
570 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
571 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
572 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
573 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
574 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
575 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
576 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
577 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
578
579 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
580 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
581
582 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
583 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
584 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
585 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
586 }
587
588 /* Map the Mini-Data cache clean area. */
589 xscale_setup_minidata(l1pagetable, minidataclean.pv_va,
590 minidataclean.pv_pa);
591
592 /* Map the vector page. */
593 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
594 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
595
596 /* Map the statically mapped devices. */
597 pmap_devmap_bootstrap(l1pagetable, iq80310_devmap);
598
599 /*
600 * Give the XScale global cache clean code an appropriately
601 * sized chunk of unmapped VA space starting at 0xff000000
602 * (our device mappings end before this address).
603 */
604 xscale_cache_clean_addr = 0xff000000U;
605
606 /*
607 * Now we have the real page tables in place so we can switch to them.
608 * Once this is done we will be running with the REAL kernel page
609 * tables.
610 */
611
612 /*
613 * Update the physical_freestart/physical_freeend/free_pages
614 * variables.
615 */
616 {
617 extern char _end[];
618
619 physical_freestart = physical_start +
620 (((((uintptr_t) _end) + PGOFSET) & ~PGOFSET) -
621 KERNEL_BASE);
622 physical_freeend = physical_end;
623 free_pages =
624 (physical_freeend - physical_freestart) / PAGE_SIZE;
625 }
626
627 /* Switch tables */
628 #ifdef VERBOSE_INIT_ARM
629 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
630 physical_freestart, free_pages, free_pages);
631 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa);
632 #endif
633 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
634 cpu_setttb(kernel_l1pt.pv_pa, true);
635 cpu_tlb_flushID();
636 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
637
638 /*
639 * Moved from cpu_startup() as data_abort_handler() references
640 * this during uvm init
641 */
642 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);
643
644 #ifdef VERBOSE_INIT_ARM
645 printf("done!\n");
646 #endif
647
648 #ifdef VERBOSE_INIT_ARM
649 printf("bootstrap done.\n");
650 #endif
651
652 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
653
654 /*
655 * Pages were allocated during the secondary bootstrap for the
656 * stacks for different CPU modes.
657 * We must now set the r13 registers in the different CPU modes to
658 * point to these stacks.
659 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
660 * of the stack memory.
661 */
662 #ifdef VERBOSE_INIT_ARM
663 printf("init subsystems: stacks ");
664 #endif
665
666 set_stackptr(PSR_IRQ32_MODE,
667 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
668 set_stackptr(PSR_ABT32_MODE,
669 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
670 set_stackptr(PSR_UND32_MODE,
671 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
672
673 /*
674 * Well we should set a data abort handler.
675 * Once things get going this will change as we will need a proper
676 * handler.
677 * Until then we will use a handler that just panics but tells us
678 * why.
679 * Initialisation of the vectors will just panic on a data abort.
680 * This just fills in a slightly better one.
681 */
682 #ifdef VERBOSE_INIT_ARM
683 printf("vectors ");
684 #endif
685 data_abort_handler_address = (u_int)data_abort_handler;
686 prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
687 undefined_handler_address = (u_int)undefinedinstruction_bounce;
688
689 /* Initialise the undefined instruction handlers */
690 #ifdef VERBOSE_INIT_ARM
691 printf("undefined ");
692 #endif
693 undefined_init();
694
695 /* Load memory into UVM. */
696 #ifdef VERBOSE_INIT_ARM
697 printf("page ");
698 #endif
699 uvm_md_init();
700 uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
701 atop(physical_freestart), atop(physical_freeend),
702 VM_FREELIST_DEFAULT);
703
704 /* Boot strap pmap telling it where managed kernel virtual memory is */
705 #ifdef VERBOSE_INIT_ARM
706 printf("pmap ");
707 #endif
708 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);
709
710 /* Setup the IRQ system */
711 #ifdef VERBOSE_INIT_ARM
712 printf("irq ");
713 #endif
714 iq80310_intr_init();
715
716 #ifdef VERBOSE_INIT_ARM
717 printf("done.\n");
718 #endif
719
720 #ifdef DDB
721 db_machine_init();
722 if (boothowto & RB_KDB)
723 Debugger();
724 #endif
725
726 /* We return the new stack pointer address */
727 return(kernelstack.pv_va + USPACE_SVC_STACK_TOP);
728 }
729
730 void
consinit(void)731 consinit(void)
732 {
733 static const bus_addr_t comcnaddrs[] = {
734 IQ80310_UART2, /* com0 (J9) */
735 IQ80310_UART1, /* com1 (J10) */
736 };
737 static int consinit_called;
738
739 if (consinit_called != 0)
740 return;
741
742 consinit_called = 1;
743
744 /*
745 * Console devices are mapped VA==PA. Our devmap reflects
746 * this, so register it now so drivers can map the console
747 * device.
748 */
749 pmap_devmap_register(iq80310_devmap);
750
751 #if NCOM > 0
752 if (comcnattach(&obio_bs_tag, comcnaddrs[comcnunit], comcnspeed,
753 COM_FREQ, COM_TYPE_NORMAL, comcnmode))
754 panic("can't init serial console @%lx", comcnaddrs[comcnunit]);
755 #else
756 panic("serial console @%lx not configured", comcnaddrs[comcnunit]);
757 #endif
758 }
759