1 /* $NetBSD: ixm1200_machdep.c,v 1.68 2023/08/03 08:16:31 mrg Exp $ */
2
3 /*
4 * Copyright (c) 2002, 2003
5 * Ichiro FUKUHARA <ichiro@ichiro.org>.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY ICHIRO FUKUHARA ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL ICHIRO FUKUHARA OR THE VOICES IN HIS HEAD BE LIABLE FOR
21 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29 /*
30 * Copyright (c) 1997,1998 Mark Brinicombe.
31 * Copyright (c) 1997,1998 Causality Limited.
32 * All rights reserved.
33 *
34 * Redistribution and use in source and binary forms, with or without
35 * modification, are permitted provided that the following conditions
36 * are met:
37 * 1. Redistributions of source code must retain the above copyright
38 * notice, this list of conditions and the following disclaimer.
39 * 2. Redistributions in binary form must reproduce the above copyright
40 * notice, this list of conditions and the following disclaimer in the
41 * documentation and/or other materials provided with the distribution.
42 * 3. All advertising materials mentioning features or use of this software
43 * must display the following acknowledgement:
44 * This product includes software developed by Mark Brinicombe
45 * for the NetBSD Project.
46 * 4. The name of the company nor the name of the author may be used to
47 * endorse or promote products derived from this software without specific
48 * prior written permission.
49 *
50 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
51 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
52 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
53 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
54 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
55 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
56 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
57 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
58 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
59 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
60 * SUCH DAMAGE.
61 */
62
63 #include <sys/cdefs.h>
64 __KERNEL_RCSID(0, "$NetBSD: ixm1200_machdep.c,v 1.68 2023/08/03 08:16:31 mrg Exp $");
65
66 #include "opt_arm_debug.h"
67 #include "opt_console.h"
68 #include "opt_ddb.h"
69 #include "opt_modular.h"
70
71 #include <sys/param.h>
72 #include <sys/device.h>
73 #include <sys/systm.h>
74 #include <sys/kernel.h>
75 #include <sys/exec.h>
76 #include <sys/proc.h>
77 #include <sys/msgbuf.h>
78 #include <sys/reboot.h>
79 #include <sys/termios.h>
80 #include <sys/ksyms.h>
81 #include <sys/bus.h>
82 #include <sys/cpu.h>
83
84 #include <uvm/uvm_extern.h>
85
86 #include <dev/cons.h>
87
88 #include "ksyms.h"
89
90 #if NKSYMS || defined(DDB) || defined(MODULAR)
91 #include <machine/db_machdep.h>
92 #include <ddb/db_sym.h>
93 #include <ddb/db_extern.h>
94 #include <sys/exec_elf.h>
95 #endif
96
97 #include <machine/bootconfig.h>
98 #include <arm/locore.h>
99 #include <arm/undefined.h>
100
101 #include <arm/arm32/machdep.h>
102
103 #include <arm/ixp12x0/ixp12x0reg.h>
104 #include <arm/ixp12x0/ixp12x0var.h>
105 #include <arm/ixp12x0/ixp12x0_comreg.h>
106 #include <arm/ixp12x0/ixp12x0_comvar.h>
107 #include <arm/ixp12x0/ixp12x0_pcireg.h>
108
109 #include <evbarm/ixm1200/ixm1200reg.h>
110 #include <evbarm/ixm1200/ixm1200var.h>
111
112 /* XXX for consinit related hacks */
113 #include <sys/conf.h>
114
115 void ixp12x0_reset(void) __attribute__((noreturn));
116
117 /* Kernel text starts 2MB in from the bottom of the kernel address space. */
118 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00200000)
119 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000)
120
121 /*
122 * The range 0xc1000000 - 0xccffffff is available for kernel VM space
123 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff
124 */
125 #define KERNEL_VM_SIZE 0x0C000000
126
127 /*
128 * Address to call from cpu_reset() to reset the machine.
129 * This is machine architecture dependent as it varies depending
130 * on where the ROM appears when you turn the MMU off.
131 */
132
133 /*
134 * Define the default console speed for the board.
135 */
136 #ifndef CONMODE
137 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB)) | CS8) /* 8N1 */
138 #endif
139 #ifndef CONSPEED
140 #define CONSPEED B38400
141 #endif
142 #ifndef CONADDR
143 #define CONADDR IXPCOM_UART_BASE
144 #endif
145
146 BootConfig bootconfig; /* Boot config storage */
147 char *boot_args = NULL;
148 char *boot_file = NULL;
149
150 vaddr_t physical_start;
151 vaddr_t physical_freestart;
152 vaddr_t physical_freeend;
153 vaddr_t physical_end;
154 u_int free_pages;
155
156 /*int debug_flags;*/
157 #ifndef PMAP_STATIC_L1S
158 int max_processes = 64; /* Default number */
159 #endif /* !PMAP_STATIC_L1S */
160
161 paddr_t msgbufphys;
162
163 extern int end;
164
165 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */
166 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */
167 #define KERNEL_PT_KERNEL_NUM 2
168 #define KERNEL_PT_IO (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM)
169 /* Page table for mapping IO */
170 #define KERNEL_PT_VMDATA (KERNEL_PT_IO + 1)
171 /* Page tables for mapping kernel VM */
172 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */
173 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
174
175 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS];
176
177 #ifdef CPU_IXP12X0
178 #define CPU_IXP12X0_CACHE_CLEAN_SIZE (0x4000 * 2)
179 extern unsigned int ixp12x0_cache_clean_addr;
180 extern unsigned int ixp12x0_cache_clean_size;
181 static vaddr_t ixp12x0_cc_base;
182 #endif /* CPU_IXP12X0 */
183
184 /* Prototypes */
185
186 void consinit(void);
187 u_int cpu_get_control(void);
188
189 void ixdp_ixp12x0_cc_setup(void);
190
191 /*
192 * void cpu_reboot(int howto, char *bootstr)
193 *
194 * Reboots the system
195 *
196 * Deal with any syncing, unmounting, dumping and shutdown hooks,
197 * then reset the CPU.
198 */
199
200 void
cpu_reboot(int howto,char * bootstr)201 cpu_reboot(int howto, char *bootstr)
202 {
203 /*
204 * If we are still cold then hit the air brakes
205 * and crash to earth fast
206 */
207 if (cold) {
208 doshutdownhooks();
209 pmf_system_shutdown(boothowto);
210 printf("Halted while still in the ICE age.\n");
211 printf("The operating system has halted.\n");
212 printf("Please press any key to reboot.\n\n");
213 cngetc();
214 printf("rebooting...\n");
215 ixp12x0_reset();
216 }
217
218 /* Disable console buffering */
219 cnpollc(1);
220
221 /*
222 * If RB_NOSYNC was not specified sync the discs.
223 * Note: Unless cold is set to 1 here, syslogd will die during the unmount.
224 * It looks like syslogd is getting woken up only to find that it cannot
225 * page part of the binary in as the filesystem has been unmounted.
226 */
227 if (!(howto & RB_NOSYNC))
228 bootsync();
229
230 /* Say NO to interrupts */
231 splhigh();
232
233 /* Do a dump if requested. */
234 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
235 dumpsys();
236
237 /* Run any shutdown hooks */
238 doshutdownhooks();
239
240 pmf_system_shutdown(boothowto);
241
242 /* Make sure IRQ's are disabled */
243 IRQdisable;
244
245 if (howto & RB_HALT) {
246 printf("The operating system has halted.\n");
247 printf("Please press any key to reboot.\n\n");
248 cngetc();
249 }
250
251 printf("rebooting...\n");
252
253 /* all interrupts are disabled */
254 disable_interrupts(I32_bit);
255
256 ixp12x0_reset();
257
258 /* ...and if that didn't work, just croak. */
259 printf("RESET FAILED!\n");
260 for (;;);
261 }
262
263 /* Static device mappings. */
264 static const struct pmap_devmap ixm1200_devmap[] = {
265 /* StrongARM System and Peripheral Registers */
266 DEVMAP_ENTRY(
267 IXP12X0_SYS_VBASE,
268 IXP12X0_SYS_HWBASE,
269 IXP12X0_SYS_SIZE
270 ),
271 /* PCI Registers Accessible Through StrongARM Core */
272 DEVMAP_ENTRY(
273 IXP12X0_PCI_VBASE, IXP12X0_PCI_HWBASE,
274 IXP12X0_PCI_SIZE
275 ),
276 /* PCI Registers Accessible Through I/O Cycle Access */
277 DEVMAP_ENTRY(
278 IXP12X0_PCI_IO_VBASE, IXP12X0_PCI_IO_HWBASE,
279 IXP12X0_PCI_IO_SIZE
280 ),
281 /* PCI Type0 Configuration Space */
282 DEVMAP_ENTRY(
283 IXP12X0_PCI_TYPE0_VBASE, IXP12X0_PCI_TYPE0_HWBASE,
284 IXP12X0_PCI_TYPE0_SIZE
285 ),
286 /* PCI Type1 Configuration Space */
287 DEVMAP_ENTRY(
288 IXP12X0_PCI_TYPE1_VBASE, IXP12X0_PCI_TYPE1_HWBASE,
289 IXP12X0_PCI_TYPE1_SIZE
290 ),
291 DEVMAP_ENTRY_END
292 };
293
294 /*
295 * Initial entry point on startup. This gets called before main() is
296 * entered.
297 * It should be responsible for setting up everything that must be
298 * in place when main is called.
299 * This includes
300 * Taking a copy of the boot configuration structure.
301 * Initialising the physical console so characters can be printed.
302 * Setting up page tables for the kernel
303 * Relocating the kernel to the bottom of physical memory
304 */
305 vaddr_t
initarm(void * arg)306 initarm(void *arg)
307 {
308 int loop;
309 int loop1;
310 u_int kerneldatasize, symbolsize;
311 vaddr_t l1pagetable;
312 vaddr_t freemempos;
313 #if NKSYMS || defined(DDB) || defined(MODULAR)
314 Elf_Shdr *sh;
315 #endif
316
317 cpu_reset_address = ixp12x0_reset;
318
319 /*
320 * Since we map v0xf0000000 == p0x90000000, it's possible for
321 * us to initialize the console now.
322 */
323 consinit();
324
325 #ifdef VERBOSE_INIT_ARM
326 /* Talk to the user */
327 printf("\nNetBSD/evbarm (IXM1200) booting ...\n");
328 #endif
329
330 /*
331 * Heads up ... Setup the CPU / MMU / TLB functions
332 */
333 if (set_cpufuncs())
334 panic("CPU not recognized!");
335
336 /* XXX overwrite bootconfig to hardcoded values */
337 bootconfig.dram[0].address = 0xc0000000;
338 bootconfig.dram[0].pages = 0x10000000 / PAGE_SIZE; /* SDRAM 256MB */
339 bootconfig.dramblocks = 1;
340
341 kerneldatasize = (uint32_t)&end - (uint32_t)KERNEL_TEXT_BASE;
342
343 symbolsize = 0;
344
345 #if NKSYMS || defined(DDB) || defined(MODULAR)
346 if (! memcmp(&end, "\177ELF", 4)) {
347 /*
348 * XXXGCC12.
349 * This accesses beyond what "int end" technically supplies.
350 */
351 #pragma GCC push_options
352 #pragma GCC diagnostic ignored "-Warray-bounds"
353 sh = (Elf_Shdr *)((char *)&end + ((Elf_Ehdr *)&end)->e_shoff);
354 #pragma GCC pop_options
355 loop = ((Elf_Ehdr *)&end)->e_shnum;
356 for(; loop; loop--, sh++)
357 if (sh->sh_offset > 0 &&
358 (sh->sh_offset + sh->sh_size) > symbolsize)
359 symbolsize = sh->sh_offset + sh->sh_size;
360 }
361 #endif
362 #ifdef VERBOSE_INIT_ARM
363 printf("kernsize=0x%x\n", kerneldatasize);
364 #endif
365 kerneldatasize += symbolsize;
366 kerneldatasize = ((kerneldatasize - 1) & ~(PAGE_SIZE * 4 - 1)) + PAGE_SIZE * 8;
367
368 /*
369 * Set up the variables that define the availability of physical
370 * memory
371 */
372 physical_start = bootconfig.dram[0].address;
373 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE);
374
375 physical_freestart = physical_start
376 + (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize;
377 physical_freeend = physical_end;
378
379 physmem = (physical_end - physical_start) / PAGE_SIZE;
380
381 freemempos = 0xc0000000;
382
383 #ifdef VERBOSE_INIT_ARM
384 printf("Allocating page tables\n");
385 #endif
386 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;
387
388 #ifdef VERBOSE_INIT_ARM
389 printf("CP15 Register1 = 0x%08x\n", cpu_get_control());
390 printf("freestart = 0x%08lx, free_pages = %d (0x%08x)\n",
391 physical_freestart, free_pages, free_pages);
392 printf("physical_start = 0x%08lx, physical_end = 0x%08lx\n",
393 physical_start, physical_end);
394 #endif
395
396 /* Define a macro to simplify memory allocation */
397 #define valloc_pages(var, np) \
398 alloc_pages((var).pv_pa, (np)); \
399 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;
400 #define alloc_pages(var, np) \
401 (var) = freemempos; \
402 memset((char *)(var), 0, ((np) * PAGE_SIZE)); \
403 freemempos += (np) * PAGE_SIZE;
404
405 loop1 = 0;
406 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
407 /* Are we 16KB aligned for an L1 ? */
408 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
409 && kernel_l1pt.pv_pa == 0) {
410 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
411 } else {
412 valloc_pages(kernel_pt_table[loop1],
413 L2_TABLE_SIZE / PAGE_SIZE);
414 ++loop1;
415 }
416 }
417
418 #ifdef DIAGNOSTIC
419 /* This should never be able to happen but better confirm that. */
420 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0)
421 panic("initarm: Failed to align the kernel page directory");
422 #endif
423
424 /*
425 * Allocate a page for the system page mapped to V0x00000000
426 * This page will just contain the system vectors and can be
427 * shared by all processes.
428 */
429 alloc_pages(systempage.pv_pa, 1);
430
431 /* Allocate stacks for all modes */
432 valloc_pages(irqstack, IRQ_STACK_SIZE);
433 valloc_pages(abtstack, ABT_STACK_SIZE);
434 valloc_pages(undstack, UND_STACK_SIZE);
435 valloc_pages(kernelstack, UPAGES);
436
437 #ifdef VERBOSE_INIT_ARM
438 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa, irqstack.pv_va);
439 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa, abtstack.pv_va);
440 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa, undstack.pv_va);
441 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa, kernelstack.pv_va);
442 #endif
443
444 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);
445
446 #ifdef CPU_IXP12X0
447 /*
448 * XXX totally stuffed hack to work round problems introduced
449 * in recent versions of the pmap code. Due to the calls used there
450 * we cannot allocate virtual memory during bootstrap.
451 */
452 for(;;) {
453 alloc_pages(ixp12x0_cc_base, 1);
454 if (! (ixp12x0_cc_base & (CPU_IXP12X0_CACHE_CLEAN_SIZE - 1)))
455 break;
456 }
457 {
458 vaddr_t dummy;
459 alloc_pages(dummy, CPU_IXP12X0_CACHE_CLEAN_SIZE / PAGE_SIZE - 1);
460 }
461 ixp12x0_cache_clean_addr = ixp12x0_cc_base;
462 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2;
463 #endif /* CPU_IXP12X0 */
464
465 #ifdef VERBOSE_INIT_ARM
466 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
467 #endif
468
469 /*
470 * Now we start construction of the L1 page table
471 * We start by mapping the L2 page tables into the L1.
472 * This means that we can replace L1 mappings later on if necessary
473 */
474 l1pagetable = kernel_l1pt.pv_pa;
475
476 /* Map the L2 pages tables in the L1 page table */
477 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00400000 - 1),
478 &kernel_pt_table[KERNEL_PT_SYS]);
479
480 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
481 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
482 &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
483
484 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
485 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
486 &kernel_pt_table[KERNEL_PT_VMDATA + loop]);
487
488 /* update the top of the kernel VM */
489 pmap_curmaxkvaddr =
490 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);
491
492 pmap_link_l2pt(l1pagetable, IXP12X0_IO_VBASE,
493 &kernel_pt_table[KERNEL_PT_IO]);
494
495 #ifdef VERBOSE_INIT_ARM
496 printf("Mapping kernel\n");
497 #endif
498
499 #if XXX
500 /* Now we fill in the L2 pagetable for the kernel code/data */
501 {
502 extern char etext[], _end[];
503 size_t textsize = (uintptr_t) etext - KERNEL_TEXT_BASE;
504 size_t totalsize = (uintptr_t) _end - KERNEL_TEXT_BASE;
505 u_int logical;
506
507 textsize = (textsize + PGOFSET) & ~PGOFSET;
508 totalsize = (totalsize + PGOFSET) & ~PGOFSET;
509
510 logical = 0x00200000; /* offset of kernel in RAM */
511
512 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
513 physical_start + logical, textsize,
514 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
515 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
516 physical_start + logical, totalsize - textsize,
517 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
518 }
519 #else
520 {
521 pmap_map_chunk(l1pagetable, KERNEL_TEXT_BASE,
522 KERNEL_TEXT_BASE, kerneldatasize,
523 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
524 }
525 #endif
526
527 #ifdef VERBOSE_INIT_ARM
528 printf("Constructing L2 page tables\n");
529 #endif
530
531 /* Map the stack pages */
532 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
533 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
534 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
535 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
536 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
537 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
538 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
539 UPAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
540
541 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
542 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
543
544 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
545 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
546 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
547 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
548 }
549
550 /* Map the vector page. */
551 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
552 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
553
554 #ifdef VERBOSE_INIT_ARM
555 printf("systempage (vector page): p0x%08lx v0x%08lx\n",
556 systempage.pv_pa, vector_page);
557 #endif
558
559 /* Map the statically mapped devices. */
560 pmap_devmap_bootstrap(l1pagetable, ixm1200_devmap);
561
562 #ifdef VERBOSE_INIT_ARM
563 printf("done.\n");
564 #endif
565
566 /*
567 * Map the Dcache Flush page.
568 * Hw Ref Manual 3.2.4.5 Software Dcache Flush
569 */
570 pmap_map_chunk(l1pagetable, ixp12x0_cache_clean_addr, 0xe0000000,
571 CPU_IXP12X0_CACHE_CLEAN_SIZE, VM_PROT_READ, PTE_CACHE);
572
573 /*
574 * Now we have the real page tables in place so we can switch to them.
575 * Once this is done we will be running with the REAL kernel page
576 * tables.
577 */
578
579 /* Switch tables */
580 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
581 cpu_setttb(kernel_l1pt.pv_pa, true);
582 cpu_tlb_flushID();
583 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
584
585 /*
586 * Moved here from cpu_startup() as data_abort_handler() references
587 * this during init
588 */
589 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);
590
591 /*
592 * We must now clean the cache again....
593 * Cleaning may be done by reading new data to displace any
594 * dirty data in the cache. This will have happened in cpu_setttb()
595 * but since we are boot strapping the addresses used for the read
596 * may have just been remapped and thus the cache could be out
597 * of sync. A re-clean after the switch will cure this.
598 * After booting there are no gross relocations of the kernel thus
599 * this problem will not occur after initarm().
600 */
601 cpu_idcache_wbinv_all();
602
603 arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
604
605 /*
606 * Pages were allocated during the secondary bootstrap for the
607 * stacks for different CPU modes.
608 * We must now set the r13 registers in the different CPU modes to
609 * point to these stacks.
610 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
611 * of the stack memory.
612 */
613 #ifdef VERBOSE_INIT_ARM
614 printf("init subsystems: stacks ");
615 #endif
616
617 set_stackptr(PSR_IRQ32_MODE,
618 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
619 set_stackptr(PSR_ABT32_MODE,
620 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
621 set_stackptr(PSR_UND32_MODE,
622 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
623 #ifdef VERBOSE_INIT_ARM
624 printf("kstack V%08lx P%08lx\n", kernelstack.pv_va,
625 kernelstack.pv_pa);
626 #endif /* VERBOSE_INIT_ARM */
627
628 /*
629 * Well we should set a data abort handler.
630 * Once things get going this will change as we will need a proper
631 * handler. Until then we will use a handler that just panics but
632 * tells us why.
633 * Initialisation of the vectors will just panic on a data abort.
634 * This just fills in a slightly better one.
635 */
636 #ifdef VERBOSE_INIT_ARM
637 printf("vectors ");
638 #endif
639 data_abort_handler_address = (u_int)data_abort_handler;
640 prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
641 undefined_handler_address = (u_int)undefinedinstruction_bounce;
642 #ifdef VERBOSE_INIT_ARM
643 printf("\ndata_abort_handler_address = %08x\n", data_abort_handler_address);
644 printf("prefetch_abort_handler_address = %08x\n", prefetch_abort_handler_address);
645 printf("undefined_handler_address = %08x\n", undefined_handler_address);
646 #endif
647
648 /* Initialise the undefined instruction handlers */
649 #ifdef VERBOSE_INIT_ARM
650 printf("undefined ");
651 #endif
652 undefined_init();
653
654 /* Load memory into UVM. */
655 #ifdef VERBOSE_INIT_ARM
656 printf("page ");
657 #endif
658 uvm_md_init();
659 uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
660 atop(physical_freestart), atop(physical_freeend),
661 VM_FREELIST_DEFAULT);
662
663 /* Boot strap pmap telling it where managed kernel virtual memory is */
664 #ifdef VERBOSE_INIT_ARM
665 printf("pmap ");
666 #endif
667 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);
668
669 /* Setup the IRQ system */
670 #ifdef VERBOSE_INIT_ARM
671 printf("irq ");
672 #endif
673 ixp12x0_intr_init();
674
675 #ifdef VERBOSE_INIT_ARM
676 printf("done.\n");
677 #endif
678
679 #ifdef VERBOSE_INIT_ARM
680 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
681 physical_freestart, free_pages, free_pages);
682 printf("freemempos=%08lx\n", freemempos);
683 printf("switching to new L1 page table @%#lx... \n", kernel_l1pt.pv_pa);
684 #endif
685
686 consinit();
687 #ifdef VERBOSE_INIT_ARM
688 printf("consinit \n");
689 #endif
690
691 ixdp_ixp12x0_cc_setup();
692
693 #ifdef VERBOSE_INIT_ARM
694 printf("bootstrap done.\n");
695 #endif
696
697 #if NKSYMS || defined(DDB) || defined(MODULAR)
698 ksyms_addsyms_elf(symbolsize, ((int *)&end), ((char *)&end) + symbolsize);
699 #endif
700
701 #ifdef DDB
702 db_machine_init();
703 if (boothowto & RB_KDB)
704 Debugger();
705 #endif
706
707 /* We return the new stack pointer address */
708 return kernelstack.pv_va + USPACE_SVC_STACK_TOP;
709 }
710
711 void
consinit(void)712 consinit(void)
713 {
714 static int consinit_called = 0;
715
716 if (consinit_called != 0)
717 return;
718
719 consinit_called = 1;
720
721 pmap_devmap_register(ixm1200_devmap);
722
723 if (ixpcomcnattach(&ixp12x0_bs_tag,
724 IXPCOM_UART_HWBASE, IXPCOM_UART_VBASE,
725 CONSPEED, CONMODE))
726 panic("can't init serial console @%lx", IXPCOM_UART_HWBASE);
727 }
728
729 /*
730 * For optimal cache cleaning we need two 16K banks of
731 * virtual address space that NOTHING else will access
732 * and then we alternate the cache cleaning between the
733 * two banks.
734 * The cache cleaning code requires 2 banks aligned
735 * on total size boundary so the banks can be alternated by
736 * xorring the size bit (assumes the bank size is a power of 2)
737 */
738 void
ixdp_ixp12x0_cc_setup(void)739 ixdp_ixp12x0_cc_setup(void)
740 {
741 int loop;
742 paddr_t kaddr;
743
744 (void) pmap_extract(pmap_kernel(), KERNEL_TEXT_BASE, &kaddr);
745 for (loop = 0; loop < CPU_IXP12X0_CACHE_CLEAN_SIZE; loop += PAGE_SIZE) {
746 pt_entry_t * const ptep = vtopte(ixp12x0_cc_base + loop);
747 const pt_entry_t npte = L2_S_PROTO | kaddr |
748 L2_S_PROT(PTE_KERNEL, VM_PROT_READ) | pte_l2_s_cache_mode;
749 l2pte_set(ptep, npte, 0);
750 PTE_SYNC(ptep);
751 }
752 ixp12x0_cache_clean_addr = ixp12x0_cc_base;
753 ixp12x0_cache_clean_size = CPU_IXP12X0_CACHE_CLEAN_SIZE / 2;
754 }
755