1 /* $NetBSD: eb7500atx_machdep.c,v 1.37 2022/05/15 20:37:51 andvar Exp $ */
2
3 /*
4 * Copyright (c) 2000-2002 Reinoud Zandijk.
5 * Copyright (c) 1994-1998 Mark Brinicombe.
6 * Copyright (c) 1994 Brini.
7 * All rights reserved.
8 *
9 * This code is derived from software written for Brini by Mark Brinicombe
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. All advertising materials mentioning features or use of this software
20 * must display the following acknowledgement:
21 * This product includes software developed by Brini.
22 * 4. The name of the company nor the name of the author may be used to
23 * endorse or promote products derived from this software without specific
24 * prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
27 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
28 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
29 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
30 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
31 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
32 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * RiscBSD kernel project
39 *
40 * machdep.c
41 *
42 * Machine dependent functions for kernel setup
43 *
44 * This file still needs a lot of work
45 *
46 * Created : 17/09/94
47 * Updated for yet another new bootloader 28/12/02
48 */
49
50 #include "opt_ddb.h"
51 #include "opt_modular.h"
52 #include "vidcvideo.h"
53 #include "pckbc.h"
54
55 #include <sys/param.h>
56
57 __KERNEL_RCSID(0, "$NetBSD: eb7500atx_machdep.c,v 1.37 2022/05/15 20:37:51 andvar Exp $");
58
59 #include <sys/systm.h>
60 #include <sys/kernel.h>
61 #include <sys/reboot.h>
62 #include <sys/proc.h>
63 #include <sys/msgbuf.h>
64 #include <sys/exec.h>
65 #include <sys/exec_aout.h>
66 #include <sys/ksyms.h>
67 #include <sys/bus.h>
68 #include <sys/cpu.h>
69 #include <sys/intr.h>
70 #include <sys/device.h>
71
72 #include <dev/cons.h>
73
74 #include <dev/ic/pckbcvar.h>
75
76 #include <dev/i2c/i2cvar.h>
77 #include <dev/i2c/pcf8583var.h>
78
79 #include <machine/db_machdep.h>
80 #include <ddb/db_sym.h>
81 #include <ddb/db_extern.h>
82
83 #include <uvm/uvm.h>
84
85 #include <arm/locore.h>
86 #include <arm/undefined.h>
87
88 #include <machine/signal.h>
89 #include <machine/bootconfig.h>
90 #include <machine/io.h>
91 #include <arm/arm32/machdep.h>
92 #include <machine/rtc.h>
93
94 #include <arm/iomd/vidc.h>
95 #include <arm/iomd/iomdreg.h>
96 #include <arm/iomd/iomdvar.h>
97 #include <arm/iomd/vidcvideo.h>
98 #include <arm/iomd/iomdiicvar.h>
99
100 /* static i2c_tag_t acorn32_i2c_tag;*/
101
102 #include "ksyms.h"
103
104 /* Kernel text starts at the base of the kernel address space. */
105 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00000000)
106 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000)
107
108 /*
109 * The range 0xf1000000 - 0xf5ffffff is available for kernel VM space
110 * Fixed mappings exist from 0xf6000000 - 0xffffffff
111 */
112 #define KERNEL_VM_SIZE 0x05000000
113
114 /*
115 * Address to call from cpu_reset() to reset the machine.
116 * This is machine architecture dependent as it varies depending
117 * on where the ROM appears when you turn the MMU off.
118 */
119
120 #define VERBOSE_INIT_ARM
121
122 struct bootconfig bootconfig; /* Boot config storage */
123 videomemory_t videomemory; /* Video memory descriptor */
124
125 char *boot_args = NULL; /* holds the pre-processed boot arguments */
126 extern char *booted_kernel; /* used for ioctl to retrieve booted kernel */
127
128 extern int *vidc_base;
129 extern uint32_t iomd_base;
130 extern struct bus_space iomd_bs_tag;
131
132 paddr_t physical_start;
133 paddr_t physical_freestart;
134 paddr_t physical_freeend;
135 paddr_t physical_end;
136 paddr_t dma_range_begin;
137 paddr_t dma_range_end;
138
139 u_int free_pages;
140 paddr_t memoryblock_end;
141
142 #ifndef PMAP_STATIC_L1S
143 int max_processes = 64; /* Default number */
144 #endif /* !PMAP_STATIC_L1S */
145
146 u_int videodram_size = 0; /* Amount of DRAM to reserve for video */
147
148 paddr_t msgbufphys;
149
150 #define KERNEL_PT_VMEM 0 /* Page table for mapping video memory */
151 #define KERNEL_PT_SYS 1 /* Page table for mapping proc0 zero page */
152 #define KERNEL_PT_KERNEL 2 /* Page table for mapping kernel */
153 #define KERNEL_PT_VMDATA 3 /* Page tables for mapping kernel VM */
154 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */
155 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
156
157 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS];
158
159
160 #ifdef CPU_SA110
161 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2)
162 static vaddr_t sa110_cc_base;
163 #endif /* CPU_SA110 */
164
165 /* Prototypes */
166 void physcon_display_base(u_int);
167 extern void consinit(void);
168
169 void data_abort_handler(trapframe_t *);
170 void prefetch_abort_handler(trapframe_t *);
171 void undefinedinstruction_bounce(trapframe_t *frame);
172
173 static void canonicalise_bootconfig(struct bootconfig *, struct bootconfig *);
174 static void process_kernel_args(void);
175
176 extern void dump_spl_masks(void);
177
178 void rpc_sa110_cc_setup(void);
179
180 void parse_rpc_bootargs(char *args);
181
182 extern void dumpsys(void);
183
184
185 # define console_flush() /* empty */
186
187
188 #define panic2(a) do { \
189 memset((void *) (videomemory.vidm_vbase), 0x55, 50*1024); \
190 consinit(); \
191 panic a; \
192 } while (/* CONSTCOND */ 0)
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
203 /* NOTE: These variables will be removed, well some of them */
204
205 extern u_int current_mask;
206
207 void
cpu_reboot(int howto,char * bootstr)208 cpu_reboot(int howto, char *bootstr)
209 {
210
211 #ifdef DIAGNOSTIC
212 printf("boot: howto=%08x curlwp=%p\n", howto, curlwp);
213
214 printf("ipl_bio=%08x ipl_net=%08x ipl_tty=%08x ipl_vm=%08x\n",
215 irqmasks[IPL_BIO], irqmasks[IPL_NET], irqmasks[IPL_TTY],
216 irqmasks[IPL_VM]);
217 printf("ipl_audio=%08x ipl_clock=%08x ipl_none=%08x\n",
218 irqmasks[IPL_AUDIO], irqmasks[IPL_CLOCK], irqmasks[IPL_NONE]);
219
220 /* dump_spl_masks(); */
221 #endif /* DIAGNOSTIC */
222
223 /*
224 * If we are still cold then hit the air brakes
225 * and crash to earth fast
226 */
227 if (cold) {
228 doshutdownhooks();
229 pmf_system_shutdown(boothowto);
230 printf("Halted while still in the ICE age.\n");
231 printf("The operating system has halted.\n");
232 printf("Please press any key to reboot.\n\n");
233 cngetc();
234 printf("rebooting...\n");
235 cpu_reset();
236 /*NOTREACHED*/
237 }
238
239 /* Disable console buffering */
240 cnpollc(1);
241
242 /*
243 * If RB_NOSYNC was not specified sync the discs.
244 * Note: Unless cold is set to 1 here, syslogd will die during
245 * the unmount. It looks like syslogd is getting woken up
246 * only to find that it cannot page part of the binary in as
247 * the filesystem has been unmounted.
248 */
249 if (!(howto & RB_NOSYNC))
250 bootsync();
251
252 /* Say NO to interrupts */
253 splhigh();
254
255 /* Do a dump if requested. */
256 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
257 dumpsys();
258
259 /*
260 * Auto reboot overload protection
261 *
262 * This code stops the kernel entering an endless loop of reboot
263 * - panic cycles. This will have the effect of stopping further
264 * reboots after it has rebooted 8 times after panics. A clean
265 * halt or reboot will reset the counter.
266 */
267
268 /* Run any shutdown hooks */
269 doshutdownhooks();
270
271 pmf_system_shutdown(boothowto);
272
273 /* Make sure IRQ's are disabled */
274 IRQdisable;
275
276 if (howto & RB_HALT) {
277 printf("The operating system has halted.\n");
278 printf("Please press any key to reboot.\n\n");
279 cngetc();
280 }
281
282 printf("rebooting...\n");
283 cpu_reset();
284 /*NOTREACHED*/
285 }
286
287
288 /*
289 * u_int initarm(BootConfig *bootconf)
290 *
291 * Initial entry point on startup. This gets called before main() is
292 * entered.
293 * It should be responsible for setting up everything that must be
294 * in place when main is called.
295 * This includes
296 * Taking a copy of the boot configuration structure.
297 * Initialising the physical console so characters can be printed.
298 * Setting up page tables for the kernel
299 * Relocating the kernel to the bottom of physical memory
300 */
301
302 /*
303 * this part is completely rewritten for the new bootloader ... It features
304 * a flat memory map with a mapping comparable to the EBSA arm32 machine
305 * to boost the portability and likeness of the code
306 */
307
308 /*
309 * Mapping table for core kernel memory. This memory is mapped at init
310 * time with section mappings.
311 *
312 * XXX One big assumption in the current architecture seems that the kernel is
313 * XXX supposed to be mapped into bootconfig.dram[0].
314 */
315
316 #define ONE_MB 0x100000
317
318 struct l1_sec_map {
319 vaddr_t va;
320 paddr_t pa;
321 vsize_t size;
322 vm_prot_t prot;
323 int cache;
324 } l1_sec_table[] = {
325 /* Map 1Mb section for VIDC20 */
326 { VIDC_BASE, VIDC_HW_BASE,
327 ONE_MB, VM_PROT_READ|VM_PROT_WRITE,
328 PTE_NOCACHE },
329
330 /* Map 1Mb section from IOMD */
331 { IOMD_BASE, IOMD_HW_BASE,
332 ONE_MB, VM_PROT_READ|VM_PROT_WRITE,
333 PTE_NOCACHE },
334
335 /* Map 1Mb of COMBO (and module space) */
336 { IO_BASE, IO_HW_BASE,
337 ONE_MB, VM_PROT_READ|VM_PROT_WRITE,
338 PTE_NOCACHE },
339 { 0, 0, 0, 0, 0 }
340 };
341
342
343 static void
canonicalise_bootconfig(struct bootconfig * bootconf,struct bootconfig * raw_bootconf)344 canonicalise_bootconfig(struct bootconfig *bootconf, struct bootconfig *raw_bootconf)
345 {
346 /* check for bootconfig v2+ structure */
347 if (raw_bootconf->magic == BOOTCONFIG_MAGIC) {
348 /* v2+ cleaned up structure found */
349 *bootconf = *raw_bootconf;
350 return;
351 } else {
352 panic2(("Internal error: no valid bootconfig block found"));
353 }
354 }
355
356
357 vaddr_t
initarm(void * cookie)358 initarm(void *cookie)
359 {
360 struct bootconfig *raw_bootconf = cookie;
361 int loop;
362 int loop1;
363 u_int logical;
364 u_int kerneldatasize;
365 u_int l1pagetable;
366 struct exec *kernexec = (struct exec *)KERNEL_TEXT_BASE;
367
368 /*
369 * Heads up ... Setup the CPU / MMU / TLB functions
370 */
371 set_cpufuncs();
372
373 /* canonicalise the boot configuration structure to allow versioning */
374 canonicalise_bootconfig(&bootconfig, raw_bootconf);
375 booted_kernel = bootconfig.kernelname;
376
377 /* if the wscons interface is used, switch off VERBOSE booting :( */
378 #if NVIDCVIDEO>0
379 # undef VERBOSE_INIT_ARM
380 #endif
381
382 /*
383 * Initialise the video memory descriptor
384 *
385 * Note: all references to the video memory virtual/physical address
386 * should go via this structure.
387 */
388
389 /* Hardwire it on the place the bootloader tells us */
390 videomemory.vidm_vbase = bootconfig.display_start;
391 videomemory.vidm_pbase = bootconfig.display_phys;
392 videomemory.vidm_size = bootconfig.display_size;
393 if (bootconfig.vram[0].pages)
394 videomemory.vidm_type = VIDEOMEM_TYPE_VRAM;
395 else
396 videomemory.vidm_type = VIDEOMEM_TYPE_DRAM;
397 vidc_base = (int *) VIDC_HW_BASE;
398 iomd_base = IOMD_HW_BASE;
399
400 /*
401 * Initialise the physical console
402 * This is done in main() but for the moment we do it here so that
403 * we can use printf in initarm() before main() has been called.
404 * only for `vidcconsole!' ... not wscons
405 */
406 #if NVIDCVIDEO == 0
407 consinit();
408 #endif
409
410 /*
411 * Initialise the diagnostic serial console
412 * This allows a means of generating output during initarm().
413 * Once all the memory map changes are complete we can call consinit()
414 * and not have to worry about things moving.
415 */
416 /* fcomcnattach(DC21285_ARMCSR_BASE, comcnspeed, comcnmode); */
417 /* XXX snif .... i am still not able to this */
418
419 /*
420 * We have the following memory map (derived from EBSA)
421 *
422 * virtual address == physical address apart from the areas:
423 * 0x00000000 -> 0x000fffff which is mapped to
424 * top 1MB of physical memory
425 * 0xf0000000 -> 0xf0ffffff which is mapped to
426 * physical address 0x01000000 -> 0x01ffffff (DRAM0a, dram[0])
427 *
428 * This means that the kernel is mapped suitably for continuing
429 * execution, all I/O is mapped 1:1 virtual to physical and
430 * physical memory is accessible.
431 *
432 * The initarm() has the responsibility for creating the kernel
433 * page tables.
434 * It must also set up various memory pointers that are used
435 * by pmap etc.
436 */
437
438 /* START OF REAL NEW STUFF */
439
440 /* Check to make sure the page size is correct */
441 if (PAGE_SIZE != bootconfig.pagesize)
442 panic2(("Page size is %d bytes instead of %d !! (huh?)\n",
443 bootconfig.pagesize, PAGE_SIZE));
444
445 /* process arguments */
446 process_kernel_args();
447
448
449 /*
450 * Now set up the page tables for the kernel ... this part is copied
451 * in a (modified?) way from the EBSA machine port....
452 */
453
454 #ifdef VERBOSE_INIT_ARM
455 printf("Allocating page tables\n");
456 #endif
457 /*
458 * Set up the variables that define the availability of physical
459 * memory
460 */
461 physical_start = 0xffffffff;
462 physical_end = 0;
463 for (loop = 0, physmem = 0; loop < bootconfig.dramblocks; ++loop) {
464 if (bootconfig.dram[loop].address < physical_start)
465 physical_start = bootconfig.dram[loop].address;
466 memoryblock_end = bootconfig.dram[loop].address +
467 bootconfig.dram[loop].pages * PAGE_SIZE;
468 if (memoryblock_end > physical_end)
469 physical_end = memoryblock_end;
470 physmem += bootconfig.dram[loop].pages;
471 };
472 /* constants for now, but might be changed/configured */
473 dma_range_begin = (paddr_t) physical_start;
474 dma_range_end = (paddr_t) MIN(physical_end, 512*1024*1024);
475 /* XXX HACK HACK XXX */
476 /* dma_range_end = 0x18000000; */
477
478 if (physical_start != bootconfig.dram[0].address) {
479 int oldblocks = 0;
480
481 /*
482 * must be a kinetic, as it's the only thing to shuffle memory
483 * around
484 */
485 /* hack hack - throw away the slow dram */
486 for (loop = 0; loop < bootconfig.dramblocks; ++loop) {
487 if (bootconfig.dram[loop].address <
488 bootconfig.dram[0].address) {
489 /* non kinetic ram */
490 bootconfig.dram[loop].address = 0;
491 physmem -= bootconfig.dram[loop].pages;
492 bootconfig.drampages -=
493 bootconfig.dram[loop].pages;
494 bootconfig.dram[loop].pages = 0;
495 oldblocks++;
496 }
497 }
498 physical_start = bootconfig.dram[0].address;
499 bootconfig.dramblocks -= oldblocks;
500 }
501
502 physical_freestart = physical_start;
503 free_pages = bootconfig.drampages;
504 physical_freeend = physical_end;
505
506
507 /*
508 * AHUM !! set this variable ... it was set up in the old 1st
509 * stage bootloader
510 */
511 kerneldatasize = bootconfig.kernsize + bootconfig.MDFsize;
512
513 /* Update the address of the first free page of physical memory */
514 /* XXX Assumption that the kernel and stuff is at the LOWEST physical memory address? XXX */
515 physical_freestart +=
516 bootconfig.kernsize + bootconfig.MDFsize + bootconfig.scratchsize;
517 free_pages -= (physical_freestart - physical_start) / PAGE_SIZE;
518
519 /* Define a macro to simplify memory allocation */
520 #define valloc_pages(var, np) \
521 alloc_pages((var).pv_pa, (np)); \
522 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;
523
524 #define alloc_pages(var, np) \
525 (var) = physical_freestart; \
526 physical_freestart += ((np) * PAGE_SIZE); \
527 free_pages -= (np); \
528 memset((char *)(var), 0, ((np) * PAGE_SIZE));
529
530 loop1 = 0;
531 kernel_l1pt.pv_pa = 0;
532 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
533 /* Are we 16KB aligned for an L1 ? */
534 if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0
535 && kernel_l1pt.pv_pa == 0) {
536 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
537 } else {
538 valloc_pages(kernel_pt_table[loop1],
539 L2_TABLE_SIZE / PAGE_SIZE);
540 ++loop1;
541 }
542 }
543
544
545 #ifdef DIAGNOSTIC
546 /* This should never be able to happen but better confirm that. */
547 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
548 panic2(("initarm: Failed to align the kernel page "
549 "directory\n"));
550 #endif
551
552 /*
553 * Allocate a page for the system page mapped to V0x00000000
554 * This page will just contain the system vectors and can be
555 * shared by all processes.
556 */
557 alloc_pages(systempage.pv_pa, 1);
558
559 /* Allocate stacks for all modes */
560 valloc_pages(irqstack, IRQ_STACK_SIZE);
561 valloc_pages(abtstack, ABT_STACK_SIZE);
562 valloc_pages(undstack, UND_STACK_SIZE);
563 valloc_pages(kernelstack, UPAGES);
564
565 #ifdef VERBOSE_INIT_ARM
566 printf("Setting up stacks :\n");
567 printf("IRQ stack: p0x%08lx v0x%08lx\n",
568 irqstack.pv_pa, irqstack.pv_va);
569 printf("ABT stack: p0x%08lx v0x%08lx\n",
570 abtstack.pv_pa, abtstack.pv_va);
571 printf("UND stack: p0x%08lx v0x%08lx\n",
572 undstack.pv_pa, undstack.pv_va);
573 printf("SVC stack: p0x%08lx v0x%08lx\n",
574 kernelstack.pv_pa, kernelstack.pv_va);
575 printf("\n");
576 #endif
577
578 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);
579
580 #ifdef CPU_SA110
581 /*
582 * XXX totally stuffed hack to work round problems introduced
583 * in recent versions of the pmap code. Due to the calls used there
584 * we cannot allocate virtual memory during bootstrap.
585 */
586 sa110_cc_base = (KERNEL_BASE + (physical_freestart - physical_start)
587 + (CPU_SA110_CACHE_CLEAN_SIZE - 1))
588 & ~(CPU_SA110_CACHE_CLEAN_SIZE - 1);
589 #endif /* CPU_SA110 */
590
591 /*
592 * Ok we have allocated physical pages for the primary kernel
593 * page tables
594 */
595
596 #ifdef VERBOSE_INIT_ARM
597 printf("Creating L1 page table\n");
598 #endif
599
600 /*
601 * Now we start construction of the L1 page table
602 * We start by mapping the L2 page tables into the L1.
603 * This means that we can replace L1 mappings later on if necessary
604 */
605 l1pagetable = kernel_l1pt.pv_pa;
606
607 /* Map the L2 pages tables in the L1 page table */
608 pmap_link_l2pt(l1pagetable, 0x00000000,
609 &kernel_pt_table[KERNEL_PT_SYS]);
610 pmap_link_l2pt(l1pagetable, KERNEL_BASE,
611 &kernel_pt_table[KERNEL_PT_KERNEL]);
612 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop)
613 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
614 &kernel_pt_table[KERNEL_PT_VMDATA + loop]);
615 pmap_link_l2pt(l1pagetable, VMEM_VBASE,
616 &kernel_pt_table[KERNEL_PT_VMEM]);
617
618 /* update the top of the kernel VM */
619 pmap_curmaxkvaddr =
620 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);
621
622 #ifdef VERBOSE_INIT_ARM
623 printf("Mapping kernel\n");
624 #endif
625
626 /* Now we fill in the L2 pagetable for the kernel code/data */
627 /* XXX Kernel doesn't have to be on physical_start (!) use bootconfig XXX */
628 /*
629 * The defines are a workaround for a recent problem that occurred
630 * with ARM 610 processors and some ARM 710 processors
631 * Other ARM 710 and StrongARM processors don't have a problem.
632 */
633 if (N_GETMAGIC(kernexec[0]) == ZMAGIC) {
634 #if defined(CPU_ARM6) || defined(CPU_ARM7)
635 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE,
636 physical_start, kernexec->a_text,
637 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
638 #else /* CPU_ARM6 || CPU_ARM7 */
639 logical = pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE,
640 physical_start, kernexec->a_text,
641 VM_PROT_READ, PTE_CACHE);
642 #endif /* CPU_ARM6 || CPU_ARM7 */
643 logical += pmap_map_chunk(l1pagetable,
644 KERNEL_TEXT_BASE + logical, physical_start + logical,
645 kerneldatasize - kernexec->a_text,
646 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
647 } else { /* !ZMAGIC */
648 /*
649 * Most likely an ELF kernel ...
650 * XXX no distinction yet between read only and
651 * read/write area's ...
652 */
653 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE,
654 physical_start, kerneldatasize,
655 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
656 };
657
658
659 #ifdef VERBOSE_INIT_ARM
660 printf("Constructing L2 page tables\n");
661 #endif
662
663 /* Map the stack pages */
664 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
665 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
666 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
667 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
668 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
669 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
670 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
671 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
672
673 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
674 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
675
676 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
677 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
678 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
679 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
680 }
681
682 /* Now we fill in the L2 pagetable for the VRAM */
683 /*
684 * Current architectures mean that the VRAM is always in 1
685 * continuous bank. This means that we can just map the 2 meg
686 * that the VRAM would occupy. In theory we don't need a page
687 * table for VRAM, we could section map it but we would need
688 * the page tables if DRAM was in use.
689 * XXX please map two adjacent virtual areas to ONE physical
690 * area
691 */
692 pmap_map_chunk(l1pagetable, VMEM_VBASE, videomemory.vidm_pbase,
693 videomemory.vidm_size, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
694 pmap_map_chunk(l1pagetable, VMEM_VBASE + videomemory.vidm_size,
695 videomemory.vidm_pbase, videomemory.vidm_size,
696 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
697
698 /* Map the vector page. */
699 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa,
700 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
701
702 /* Map the core memory needed before autoconfig */
703 loop = 0;
704 while (l1_sec_table[loop].size) {
705 vsize_t sz;
706
707 #ifdef VERBOSE_INIT_ARM
708 printf("%08lx -> %08lx @ %08lx\n", l1_sec_table[loop].pa,
709 l1_sec_table[loop].pa + l1_sec_table[loop].size - 1,
710 l1_sec_table[loop].va);
711 #endif
712 for (sz = 0; sz < l1_sec_table[loop].size; sz += L1_S_SIZE)
713 pmap_map_section(l1pagetable,
714 l1_sec_table[loop].va + sz,
715 l1_sec_table[loop].pa + sz,
716 l1_sec_table[loop].prot,
717 l1_sec_table[loop].cache);
718 ++loop;
719 }
720
721 /*
722 * Now we have the real page tables in place so we can switch
723 * to them. Once this is done we will be running with the
724 * REAL kernel page tables.
725 */
726
727 #ifdef VERBOSE_INIT_ARM
728 printf("switching domains\n");
729 #endif
730 /* be a client to all domains */
731 cpu_domains(0x55555555);
732
733 /* Switch tables */
734 #ifdef VERBOSE_INIT_ARM
735 printf("switching to new L1 page table\n");
736 #endif
737 cpu_setttb(kernel_l1pt.pv_pa, true);
738
739 /*
740 * We must now clean the cache again....
741 * Cleaning may be done by reading new data to displace any
742 * dirty data in the cache. This will have happened in cpu_setttb()
743 * but since we are boot strapping the addresses used for the read
744 * may have just been remapped and thus the cache could be out
745 * of sync. A re-clean after the switch will cure this.
746 * After booting there are no gross relocations of the kernel thus
747 * this problem will not occur after initarm().
748 */
749 cpu_idcache_wbinv_all();
750 cpu_tlb_flushID();
751 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
752
753 /*
754 * Moved from cpu_startup() as data_abort_handler() references
755 * this during uvm init
756 */
757 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);
758
759 /*
760 * if there is support for a serial console ...we should now
761 * reattach it
762 */
763 /* fcomcndetach();*/
764
765 /*
766 * Reflect videomemory relocation in the videomemory structure
767 * and reinit console
768 */
769 if (bootconfig.vram[0].pages == 0) {
770 videomemory.vidm_vbase = VMEM_VBASE;
771 } else {
772 videomemory.vidm_vbase = VMEM_VBASE;
773 bootconfig.display_start = VMEM_VBASE;
774 };
775 vidc_base = (int *) VIDC_BASE;
776 iomd_base = IOMD_BASE;
777
778 #ifdef VERBOSE_INIT_ARM
779 printf("running on the new L1 page table!\n");
780 printf("done.\n");
781 #endif
782
783 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL);
784
785 #ifdef VERBOSE_INIT_ARM
786 printf("\n");
787 #endif
788
789 /*
790 * Pages were allocated during the secondary bootstrap for the
791 * stacks for different CPU modes.
792 * We must now set the r13 registers in the different CPU modes to
793 * point to these stacks.
794 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
795 * of the stack memory.
796 */
797 #ifdef VERBOSE_INIT_ARM
798 printf("init subsystems: stacks ");
799 console_flush();
800 #endif
801
802 set_stackptr(PSR_IRQ32_MODE,
803 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
804 set_stackptr(PSR_ABT32_MODE,
805 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
806 set_stackptr(PSR_UND32_MODE,
807 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
808 #ifdef VERBOSE_INIT_ARM
809 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va,
810 kernelstack.pv_pa);
811 #endif /* VERBOSE_INIT_ARM */
812
813 /*
814 * Well we should set a data abort handler.
815 * Once things get going this will change as we will need a proper
816 * handler. Until then we will use a handler that just panics but
817 * tells us why.
818 * Initialisation of the vectors will just panic on a data abort.
819 * This just fills in a slightly better one.
820 */
821 #ifdef VERBOSE_INIT_ARM
822 printf("vectors ");
823 #endif
824 data_abort_handler_address = (u_int)data_abort_handler;
825 prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
826 undefined_handler_address = (u_int)undefinedinstruction_bounce;
827 console_flush();
828
829
830 /*
831 * At last !
832 * We now have the kernel in physical memory from the bottom upwards.
833 * Kernel page tables are physically above this.
834 * The kernel is mapped to 0xf0000000
835 * The kernel data PTs will handle the mapping of
836 * 0xf1000000-0xf5ffffff (80 Mb)
837 * 2Meg of VRAM is mapped to 0xf7000000
838 * The page tables are mapped to 0xefc00000
839 * The IOMD is mapped to 0xf6000000
840 * The VIDC is mapped to 0xf6100000
841 * The IOMD/VIDC could be pushed up higher but i havent got
842 * sufficient documentation to do so; the addresses are not
843 * parametized yet and hard to read... better fix this before;
844 * its pretty unforgiving.
845 */
846
847 /* Initialise the undefined instruction handlers */
848 #ifdef VERBOSE_INIT_ARM
849 printf("undefined ");
850 #endif
851 undefined_init();
852 console_flush();
853
854 /* Load memory into UVM. */
855 #ifdef VERBOSE_INIT_ARM
856 printf("page ");
857 #endif
858 uvm_md_init();
859
860 for (loop = 0; loop < bootconfig.dramblocks; loop++) {
861 paddr_t start = (paddr_t)bootconfig.dram[loop].address;
862 paddr_t end = start + (bootconfig.dram[loop].pages * PAGE_SIZE);
863
864 if (start < physical_freestart)
865 start = physical_freestart;
866 if (end > physical_freeend)
867 end = physical_freeend;
868
869 /* XXX Consider DMA range intersection checking. */
870
871 uvm_page_physload(atop(start), atop(end),
872 atop(start), atop(end), VM_FREELIST_DEFAULT);
873 }
874
875 /* Boot strap pmap telling it where managed kernel virtual memory is */
876 #ifdef VERBOSE_INIT_ARM
877 printf("pmap ");
878 #endif
879 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);
880 console_flush();
881
882 /* Setup the IRQ system */
883 #ifdef VERBOSE_INIT_ARM
884 printf("irq ");
885 #endif
886 console_flush();
887 irq_init();
888 #ifdef VERBOSE_INIT_ARM
889 printf("done.\n\n");
890 #endif
891
892 #if NVIDCVIDEO>0
893 consinit(); /* necessary ? */
894 #endif
895
896 /* Talk to the user */
897 printf("NetBSD/evbarm booting ... \n");
898
899 /* Tell the user if his boot loader is too old */
900 if ((bootconfig.magic < BOOTCONFIG_MAGIC) ||
901 (bootconfig.version != BOOTCONFIG_VERSION)) {
902 printf("\nDETECTED AN OLD BOOTLOADER. PLEASE UPGRADE IT\n\n");
903 delay(5000000);
904 }
905
906 printf("Kernel loaded from file %s\n", bootconfig.kernelname);
907 printf("Kernel arg string (@%p) %s\n",
908 bootconfig.args, bootconfig.args);
909 printf("\nBoot configuration structure reports the following "
910 "memory\n");
911
912 printf(" DRAM block 0a at %08x size %08x "
913 "DRAM block 0b at %08x size %08x\n\r",
914 bootconfig.dram[0].address,
915 bootconfig.dram[0].pages * bootconfig.pagesize,
916 bootconfig.dram[1].address,
917 bootconfig.dram[1].pages * bootconfig.pagesize);
918 printf(" DRAM block 1a at %08x size %08x "
919 "DRAM block 1b at %08x size %08x\n\r",
920 bootconfig.dram[2].address,
921 bootconfig.dram[2].pages * bootconfig.pagesize,
922 bootconfig.dram[3].address,
923 bootconfig.dram[3].pages * bootconfig.pagesize);
924 printf(" VRAM block 0 at %08x size %08x\n\r",
925 bootconfig.vram[0].address,
926 bootconfig.vram[0].pages * bootconfig.pagesize);
927
928 #if NKSYMS || defined(DDB) || defined(MODULAR)
929 ksyms_addsyms_elf(bootconfig.ksym_end - bootconfig.ksym_start,
930 (void *) bootconfig.ksym_start, (void *) bootconfig.ksym_end);
931 #endif
932
933
934 #ifdef DDB
935 db_machine_init();
936 if (boothowto & RB_KDB)
937 Debugger();
938 #endif /* DDB */
939
940 /* We return the new stack pointer address */
941 return kernelstack.pv_va + USPACE_SVC_STACK_TOP;
942 }
943
944
945 static void
process_kernel_args(void)946 process_kernel_args(void)
947 {
948 char *args;
949
950 /* Ok now we will check the arguments for interesting parameters. */
951 args = bootconfig.args;
952 boothowto = 0;
953
954 /* Only arguments itself are passed from the new bootloader */
955 while (*args == ' ')
956 ++args;
957
958 boot_args = args;
959 parse_mi_bootargs(boot_args);
960 parse_rpc_bootargs(boot_args);
961 }
962
963
964 void
parse_rpc_bootargs(char * args)965 parse_rpc_bootargs(char *args)
966 {
967 int integer;
968
969 if (get_bootconf_option(args, "videodram", BOOTOPT_TYPE_INT,
970 &integer)) {
971 videodram_size = integer;
972 /* Round to 4K page */
973 videodram_size *= 1024;
974 videodram_size = round_page(videodram_size);
975 if (videodram_size > 1024*1024)
976 videodram_size = 1024*1024;
977 }
978 }
979 /* End of machdep.c */
980