1 /*-
2 * Copyright (c) 2012 The NetBSD Foundation, Inc.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to The NetBSD Foundation
6 * by Paul Fleischer <paul@xpg.dk>
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 THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
28 */
29 /* This file is based on arch/evbarm/smdk2xx0/smdk2410_machdep.c */
30 /*
31 * Copyright (c) 2002, 2003 Fujitsu Component Limited
32 * Copyright (c) 2002, 2003, 2005 Genetec Corporation
33 * All rights reserved.
34 *
35 * Redistribution and use in source and binary forms, with or without
36 * modification, are permitted provided that the following conditions
37 * are met:
38 * 1. Redistributions of source code must retain the above copyright
39 * notice, this list of conditions and the following disclaimer.
40 * 2. Redistributions in binary form must reproduce the above copyright
41 * notice, this list of conditions and the following disclaimer in the
42 * documentation and/or other materials provided with the distribution.
43 * 3. Neither the name of The Fujitsu Component Limited nor the name of
44 * Genetec corporation may not be used to endorse or promote products
45 * derived from this software without specific prior written permission.
46 *
47 * THIS SOFTWARE IS PROVIDED BY FUJITSU COMPONENT LIMITED AND GENETEC
48 * CORPORATION ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
49 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
50 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
51 * DISCLAIMED. IN NO EVENT SHALL FUJITSU COMPONENT LIMITED OR GENETEC
52 * CORPORATION BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
53 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
54 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
55 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
56 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
57 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
58 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
59 * SUCH DAMAGE.
60 */
61 /*
62 * Copyright (c) 2001,2002 ARM Ltd
63 * All rights reserved.
64 *
65 * Redistribution and use in source and binary forms, with or without
66 * modification, are permitted provided that the following conditions
67 * are met:
68 * 1. Redistributions of source code must retain the above copyright
69 * notice, this list of conditions and the following disclaimer.
70 * 2. Redistributions in binary form must reproduce the above copyright
71 * notice, this list of conditions and the following disclaimer in the
72 * documentation and/or other materials provided with the distribution.
73 * 3. The name of the company may not be used to endorse or promote
74 * products derived from this software without specific prior written
75 * permission.
76 *
77 * THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND
78 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
79 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
80 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ARM LTD
81 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
82 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
83 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
84 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
85 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
86 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
87 * POSSIBILITY OF SUCH DAMAGE.
88 *
89 */
90
91 /*
92 * Copyright (c) 1997,1998 Mark Brinicombe.
93 * Copyright (c) 1997,1998 Causality Limited.
94 * All rights reserved.
95 *
96 * Redistribution and use in source and binary forms, with or without
97 * modification, are permitted provided that the following conditions
98 * are met:
99 * 1. Redistributions of source code must retain the above copyright
100 * notice, this list of conditions and the following disclaimer.
101 * 2. Redistributions in binary form must reproduce the above copyright
102 * notice, this list of conditions and the following disclaimer in the
103 * documentation and/or other materials provided with the distribution.
104 * 3. All advertising materials mentioning features or use of this software
105 * must display the following acknowledgement:
106 * This product includes software developed by Mark Brinicombe
107 * for the NetBSD Project.
108 * 4. The name of the company nor the name of the author may be used to
109 * endorse or promote products derived from this software without specific
110 * prior written permission.
111 *
112 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
113 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
114 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
115 * IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
116 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
117 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
118 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
119 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
120 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
121 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
122 * SUCH DAMAGE.
123 *
124 * Machine dependant functions for kernel setup for integrator board
125 *
126 * Created : 24/11/97
127 */
128
129 /*
130 * Machine dependant functions for kernel setup for FriendlyARM MINI2440
131 */
132
133 #include <sys/cdefs.h>
134 __KERNEL_RCSID(0, "$NetBSD: mini2440_machdep.c,v 1.22 2024/02/20 23:36:02 andvar Exp $");
135
136 #include "opt_arm_debug.h"
137 #include "opt_console.h"
138 #include "opt_ddb.h"
139 #include "opt_kgdb.h"
140 #include "opt_md.h"
141
142 #include <sys/param.h>
143 #include <sys/device.h>
144 #include <sys/systm.h>
145 #include <sys/kernel.h>
146 #include <sys/exec.h>
147 #include <sys/proc.h>
148 #include <sys/msgbuf.h>
149 #include <sys/reboot.h>
150 #include <sys/termios.h>
151 #include <sys/ksyms.h>
152 #include <sys/mount.h>
153
154 #include <net/if.h>
155 #include <net/if_ether.h>
156 #include <net/if_media.h>
157
158 #include <uvm/uvm_extern.h>
159
160 #include <dev/cons.h>
161 #include <dev/md.h>
162
163 #include <machine/db_machdep.h>
164 #include <ddb/db_sym.h>
165 #include <ddb/db_extern.h>
166 #ifdef KGDB
167 #include <sys/kgdb.h>
168 #endif
169
170 #include <sys/exec_elf.h>
171
172 #include <sys/bus.h>
173 #include <machine/cpu.h>
174 #include <machine/frame.h>
175 #include <machine/intr.h>
176 #include <arm/undefined.h>
177
178 #include <machine/autoconf.h>
179
180 #include <arm/locore.h>
181 #include <arm/arm32/machdep.h>
182
183 #include <arm/s3c2xx0/s3c2440reg.h>
184 #include <arm/s3c2xx0/s3c2440var.h>
185
186 #include <arch/evbarm/mini2440/mini2440_bootinfo.h>
187
188 #include "ksyms.h"
189
190 #ifndef SDRAM_START
191 #define SDRAM_START S3C2440_SDRAM_START
192 #endif
193 #ifndef SDRAM_SIZE
194 #define SDRAM_SIZE (64*1024*1024) /* 64 Mb */
195 #endif
196
197 /*
198 * Address to map I/O registers in early initialize stage.
199 */
200 #define MINI2440_IO_VBASE 0xfd000000
201
202 /* Kernel text starts 2MB in from the bottom of the kernel address space. */
203 #define KERNEL_OFFSET 0x00200000
204 #define KERNEL_TEXT_BASE (KERNEL_BASE + KERNEL_OFFSET)
205 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000)
206
207 /*
208 * The range 0xc1000000 - 0xccffffff is available for kernel VM space
209 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff
210 */
211 #define KERNEL_VM_SIZE 0x0C000000
212
213 /* Declared extern elsewhere in the kernel */
214 BootConfig bootconfig; /* Boot config storage */
215 char *boot_args = NULL;
216 //char *boot_file = NULL;
217
218 char bootinfo[BOOTINFO_MAXSIZE];
219 struct btinfo_rootdevice *bi_rdev;
220 struct btinfo_net *bi_net;
221 struct btinfo_bootpath *bi_path;
222
223 vaddr_t physical_start;
224 vaddr_t physical_freestart;
225 vaddr_t physical_freeend;
226 vaddr_t physical_freeend_low;
227 vaddr_t physical_end;
228 u_int free_pages;
229 vaddr_t pagetables_start;
230
231 /*int debug_flags;*/
232 #ifndef PMAP_STATIC_L1S
233 int max_processes = 64; /* Default number */
234 #endif /* !PMAP_STATIC_L1S */
235
236 paddr_t msgbufphys;
237
238 #define KERNEL_PT_SYS 0 /* L2 table for mapping zero page */
239 #define KERNEL_PT_KERNEL 1 /* L2 table for mapping kernel */
240 #define KERNEL_PT_KERNEL_NUM 3 /* L2 tables for mapping kernel VM */
241
242 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL + KERNEL_PT_KERNEL_NUM)
243
244 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */
245 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
246
247 pv_addr_t kernel_pt_table[NUM_KERNEL_PTS];
248
249 /* Prototypes */
250
251 void consinit(void);
252 void kgdb_port_init(void);
253 static void mini2440_ksyms(struct btinfo_symtab *bi_symtab);
254 static void *lookup_bootinfo(int type);
255 static void mini2440_device_register(device_t dev, void *aux);
256
257
258 #include "com.h"
259 #if NCOM > 0
260 #include <dev/ic/comreg.h>
261 #include <dev/ic/comvar.h>
262 #endif
263
264 #include "sscom.h"
265 #if NSSCOM > 0
266 #include "opt_sscom.h"
267 #include <arm/s3c2xx0/sscom_var.h>
268 #endif
269
270 /*
271 * Define the default console speed for the board. This is generally
272 * what the firmware provided with the board defaults to.
273 */
274 #ifndef CONSPEED
275 #define CONSPEED B115200 /* TTYDEF_SPEED */
276 #endif
277 #ifndef CONMODE
278 #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */
279 #endif
280
281 int comcnspeed = CONSPEED;
282 int comcnmode = CONMODE;
283
284 /*
285 * void cpu_reboot(int howto, char *bootstr)
286 *
287 * Reboots the system
288 *
289 * Deal with any syncing, unmounting, dumping and shutdown hooks,
290 * then reset the CPU.
291 */
292 void
cpu_reboot(int howto,char * bootstr)293 cpu_reboot(int howto, char *bootstr)
294 {
295 #ifdef DIAGNOSTIC
296 /* info */
297 printf("boot: howto=%08x curproc=%p\n", howto, curproc);
298 #endif
299
300 cpu_reset_address_paddr = vtophys((uintptr_t)s3c2440_softreset);
301
302 /*
303 * If we are still cold then hit the air brakes
304 * and crash to earth fast
305 */
306 if (cold) {
307 doshutdownhooks();
308 printf("The operating system has halted.\n");
309 printf("Please press any key to reboot.\n\n");
310 cngetc();
311 printf("rebooting...\n");
312 cpu_reset();
313 /* NOTREACHED */
314 }
315 /* Disable console buffering */
316
317 /*
318 * If RB_NOSYNC was not specified sync the discs.
319 * Note: Unless cold is set to 1 here, syslogd will die during the
320 * unmount. It looks like syslogd is getting woken up only to find
321 * that it cannot page part of the binary in as the filesystem has
322 * been unmounted.
323 */
324 if (!(howto & RB_NOSYNC))
325 bootsync();
326
327 /* Say NO to interrupts */
328 splhigh();
329
330 /* Do a dump if requested. */
331 if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP)
332 dumpsys();
333
334 /* Run any shutdown hooks */
335 doshutdownhooks();
336
337 /* Make sure IRQ's are disabled */
338 IRQdisable;
339
340 if (howto & RB_HALT) {
341 printf("The operating system has halted.\n");
342 printf("Please press any key to reboot.\n\n");
343 cngetc();
344 }
345 printf("rebooting...\n");
346 cpu_reset();
347 /* NOTREACHED */
348 }
349
350 /*
351 * Static device mappings. These peripheral registers are mapped at
352 * fixed virtual addresses very early in initarm() so that we can use
353 * them while booting the kernel , and stay at the same address
354 * throughout whole kernel's life time.
355 *
356 * We use this table twice; once with bootstrap page table, and once
357 * with kernel's page table which we build up in initarm().
358 *
359 * Since we map these registers into the bootstrap page table using
360 * pmap_devmap_bootstrap() which calls pmap_map_chunk(), we map
361 * registers segment-aligned and segment-rounded in order to avoid
362 * using the 2nd page tables.
363 */
364
365 #define _V(n) (MINI2440_IO_VBASE + (n) * L1_S_SIZE)
366
367 #define GPIO_VBASE _V(0)
368 #define INTCTL_VBASE _V(1)
369 #define CLKMAN_VBASE _V(2)
370 #define UART_VBASE _V(3)
371
372 static const struct pmap_devmap mini2440_devmap[] = {
373 /* GPIO registers */
374 DEVMAP_ENTRY(
375 GPIO_VBASE,
376 S3C2440_GPIO_BASE,
377 S3C2440_GPIO_SIZE
378 ),
379 DEVMAP_ENTRY(
380 INTCTL_VBASE,
381 S3C2440_INTCTL_BASE,
382 S3C2440_INTCTL_SIZE
383 ),
384 DEVMAP_ENTRY(
385 CLKMAN_VBASE,
386 S3C2440_CLKMAN_BASE,
387 S3C24X0_CLKMAN_SIZE
388 ),
389 /* UART registers for UART0, 1, 2. */
390 DEVMAP_ENTRY(
391 UART_VBASE,
392 S3C2440_UART0_BASE,
393 S3C2440_UART_BASE(3) - S3C2440_UART0_BASE
394 ),
395 DEVMAP_ENTRY_END
396 };
397
398 static inline pd_entry_t *
read_ttb(void)399 read_ttb(void)
400 {
401 long ttb;
402
403 __asm volatile("mrc p15, 0, %0, c2, c0, 0" : "=r"(ttb));
404
405
406 return (pd_entry_t *)(ttb & ~((1 << 14) - 1));
407 }
408
409
410 #define ioreg_write32(a,v) (*(volatile uint32_t *)(a)=(v))
411
412 /*
413 * vaddr_t initarm(...)
414 *
415 * Initial entry point on startup. This gets called before main() is
416 * entered.
417 * It should be responsible for setting up everything that must be
418 * in place when main is called.
419 * This includes
420 * Taking a copy of the boot configuration structure.
421 * Initialising the physical console so characters can be printed.
422 * Setting up page tables for the kernel
423 * Relocating the kernel to the bottom of physical memory
424 */
425
426 vaddr_t
initarm(void * arg)427 initarm(void *arg)
428 {
429 int loop;
430 int loop1;
431 u_int l1pagetable;
432 extern int etext __asm("_etext");
433 extern int end __asm("_end");
434 uint32_t kerneldatasize;
435 struct btinfo_magic *bi_magic = arg;
436 struct btinfo_bootstring *bi_bootstring;
437 struct btinfo_symtab *bi_symtab;
438
439 boothowto = 0;
440
441 /* Copy bootinfo from boot loader into kernel memory where it remains.
442 */
443 if (bi_magic != 0x0 && bi_magic->magic == BOOTINFO_MAGIC) {
444 memcpy(bootinfo, bi_magic, sizeof(bootinfo));
445 } else {
446 memset(bootinfo, 0, sizeof(bootinfo));
447 }
448
449 /* Extract boot_args from bootinfo */
450 bi_bootstring = lookup_bootinfo(BTINFO_BOOTSTRING);
451 if (bi_bootstring ) {
452 printf("Bootloader args are %s\n", bi_bootstring->bootstring);
453 boot_args = bi_bootstring->bootstring;
454 parse_mi_bootargs(boot_args);
455 }
456
457 #define pdatb (*(volatile uint8_t *)(S3C2440_GPIO_BASE+GPIO_PBDAT))
458
459 // 0x1E0 is the mask for GPB5, GPB6, GPB7, and GPB8
460 #define __LED(x) (pdatb = (pdatb & ~0x1e0) | (~(1<<(x+5)) & 0x1e0))
461
462 __LED(0);
463
464 /*
465 * Heads up ... Setup the CPU / MMU / TLB functions
466 */
467 if (set_cpufuncs())
468 panic("cpu not recognized!");
469
470 /*
471 * Map I/O registers that are used in startup. Now we are
472 * still using page table prepared by bootloader. Later we'll
473 * map those registers at the same address in the kernel page
474 * table.
475 */
476 pmap_devmap_bootstrap((vaddr_t)read_ttb(), mini2440_devmap);
477
478 #undef pdatb
479 #define pdatb (*(volatile uint8_t *)(GPIO_VBASE+GPIO_PBDAT))
480
481 /* Disable all peripheral interrupts */
482 ioreg_write32(INTCTL_VBASE + INTCTL_INTMSK, ~0);
483
484 __LED(1);
485
486 /* initialize some variables so that splfoo() doesn't
487 touch illegal address. */
488 s3c2xx0_intr_bootstrap(INTCTL_VBASE);
489
490 __LED(2);
491 consinit();
492 __LED(3);
493
494 /* Extract information from the bootloader configuration */
495 bi_rdev = lookup_bootinfo(BTINFO_ROOTDEVICE);
496 bi_net = lookup_bootinfo(BTINFO_NET);
497 bi_path = lookup_bootinfo(BTINFO_BOOTPATH);
498
499 #ifdef VERBOSE_INIT_ARM
500 printf("consinit done\n");
501 #endif
502
503 #ifdef KGDB
504 kgdb_port_init();
505 #endif
506
507 #ifdef VERBOSE_INIT_ARM
508 /* Talk to the user */
509 printf("\nNetBSD/evbarm (MINI2440) booting ...\n");
510 #endif
511 /*
512 * Ok we have the following memory map
513 *
514 * Physical Address Range Description
515 * ----------------------- ----------------------------------
516 * 0x30000000 - 0x33ffffff SDRAM (64MB)
517 *
518 * Kernel is loaded by bootloader at 0x30200000
519 *
520 * The initarm() has the responsibility for creating the kernel
521 * page tables.
522 * It must also set up various memory pointers that are used
523 * by pmap etc.
524 */
525
526 /* Fake bootconfig structure for the benefit of pmap.c */
527 /* XXX must make the memory description h/w independent */
528 bootconfig.dramblocks = 1;
529 bootconfig.dram[0].address = SDRAM_START;
530 bootconfig.dram[0].pages = SDRAM_SIZE / PAGE_SIZE;
531
532 /*
533 * Set up the variables that define the availability of
534 * physical memory.
535 * We use the 2MB between the physical start and the kernel to
536 * begin with. Allocating from 0x30200000 and downwards
537 * If we get too close to the bottom of SDRAM, we
538 * will panic. We will update physical_freestart and
539 * physical_freeend later to reflect what pmap_bootstrap()
540 * wants to see.
541 *
542 * XXX pmap_bootstrap() needs an enema.
543 */
544 physical_start = bootconfig.dram[0].address;
545 physical_end = physical_start + (bootconfig.dram[0].pages * PAGE_SIZE);
546
547 physical_freestart = SDRAM_START; /* XXX */
548 physical_freeend = SDRAM_START + KERNEL_OFFSET;
549
550 physmem = (physical_end - physical_start) / PAGE_SIZE;
551
552 #ifdef VERBOSE_INIT_ARM
553 /* Tell the user about the memory */
554 printf("physmemory: 0x%"PRIxPSIZE" pages at 0x%08lx -> 0x%08lx\n", physmem,
555 physical_start, physical_end - 1);
556 printf("phys_end: 0x%08lx\n", physical_end);
557 #endif
558
559 /*
560 * XXX
561 * Okay, the kernel starts 2MB in from the bottom of physical
562 * memory. We are going to allocate our bootstrap pages downwards
563 * from there.
564 *
565 * We need to allocate some fixed page tables to get the kernel
566 * going. We allocate one page directory and a number of page
567 * tables and store the physical addresses in the kernel_pt_table
568 * array.
569 *
570 * The kernel page directory must be on a 16K boundary. The page
571 * tables must be on 4K boundaries. What we do is allocate the
572 * page directory on the first 16K boundary that we encounter, and
573 * the page tables on 4K boundaries otherwise. Since we allocate
574 * at least 3 L2 page tables, we are guaranteed to encounter at
575 * least one 16K aligned region.
576 */
577
578 #ifdef VERBOSE_INIT_ARM
579 printf("Allocating page tables\n");
580 #endif
581
582 free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE;
583
584 #ifdef VERBOSE_INIT_ARM
585 printf("freestart = 0x%08lx, free_pages = %d (0x%08x), freeend = 0x%08lx\n",
586 physical_freestart, free_pages, free_pages, physical_freeend);
587 #endif
588
589 /* Define a macro to simplify memory allocation */
590 #define valloc_pages(var, np) \
591 alloc_pages((var).pv_pa, (np)); \
592 (var).pv_va = KERNEL_BASE + (var).pv_pa - physical_start;
593
594 #define alloc_pages(var, np) \
595 physical_freeend -= ((np) * PAGE_SIZE); \
596 if (physical_freeend < physical_freestart) \
597 panic("initarm: out of memory"); \
598 (var) = physical_freeend; \
599 free_pages -= (np); \
600 memset((char *)(var), 0, ((np) * PAGE_SIZE));
601
602 loop1 = 0;
603 for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) {
604 /* Are we 16KB aligned for an L1 ? */
605 if (((physical_freeend - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) == 0
606 && kernel_l1pt.pv_pa == 0) {
607 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
608 } else {
609 valloc_pages(kernel_pt_table[loop1],
610 L2_TABLE_SIZE / PAGE_SIZE);
611 ++loop1;
612 }
613 }
614
615 /* This should never be able to happen but better confirm that. */
616 if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE - 1)) != 0)
617 panic("initarm: Failed to align the kernel page directory\n");
618
619 /*
620 * Allocate a page for the system page mapped to V0x00000000
621 * This page will just contain the system vectors and can be
622 * shared by all processes.
623 */
624 alloc_pages(systempage.pv_pa, 1);
625
626 /* Allocate stacks for all modes */
627 valloc_pages(irqstack, IRQ_STACK_SIZE);
628 valloc_pages(abtstack, ABT_STACK_SIZE);
629 valloc_pages(undstack, UND_STACK_SIZE);
630 valloc_pages(kernelstack, UPAGES);
631
632 #ifdef VERBOSE_INIT_ARM
633 printf("IRQ stack: p0x%08lx v0x%08lx\n", irqstack.pv_pa,
634 irqstack.pv_va);
635 printf("ABT stack: p0x%08lx v0x%08lx\n", abtstack.pv_pa,
636 abtstack.pv_va);
637 printf("UND stack: p0x%08lx v0x%08lx\n", undstack.pv_pa,
638 undstack.pv_va);
639 printf("SVC stack: p0x%08lx v0x%08lx\n", kernelstack.pv_pa,
640 kernelstack.pv_va);
641 printf("Free memory in bootstrap region: %ld bytes\n", physical_freeend - physical_freestart);
642 #endif
643
644 alloc_pages(msgbufphys, round_page(MSGBUFSIZE) / PAGE_SIZE);
645
646 physical_freeend_low = physical_freeend;
647
648 /*
649 * Ok we have allocated physical pages for the primary kernel
650 * page tables
651 */
652
653 #ifdef VERBOSE_INIT_ARM
654 printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa);
655 #endif
656
657 /*
658 * Now we start construction of the L1 page table
659 * We start by mapping the L2 page tables into the L1.
660 * This means that we can replace L1 mappings later on if necessary
661 */
662 l1pagetable = kernel_l1pt.pv_pa;
663
664 /* Map the L2 pages tables in the L1 page table */
665 pmap_link_l2pt(l1pagetable, 0x00000000,
666 &kernel_pt_table[KERNEL_PT_SYS]);
667 for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++)
668 pmap_link_l2pt(l1pagetable, KERNEL_BASE + loop * 0x00400000,
669 &kernel_pt_table[KERNEL_PT_KERNEL + loop]);
670 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++)
671 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
672 &kernel_pt_table[KERNEL_PT_VMDATA + loop]);
673
674 /* update the top of the kernel VM */
675 pmap_curmaxkvaddr =
676 KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000);
677
678 #ifdef VERBOSE_INIT_ARM
679 printf("Mapping kernel\n");
680 #endif
681
682 /* Now we fill in the L2 pagetable for the kernel static code/data */
683 {
684 /* Total size must include symbol table, if it exists.
685 The size of the symbol table can be acquired from the ELF
686 header, to which a pointer is passed in the boot info (ssym).
687 */
688 size_t textsize = (uintptr_t)&etext - KERNEL_TEXT_BASE;
689 kerneldatasize = (uintptr_t)&end - KERNEL_TEXT_BASE;
690 u_int logical;
691
692 bi_symtab = lookup_bootinfo(BTINFO_SYMTAB);
693
694 if (bi_symtab) {
695 Elf_Ehdr *elfHeader;
696 Elf_Shdr *sectionHeader;
697 int nsection;
698 int sz = 0;
699
700 elfHeader = bi_symtab->ssym;
701
702 #ifdef VERBOSE_INIT_ARM
703 printf("Symbol table information provided by bootloader\n");
704 printf("ELF header is at %p\n", elfHeader);
705 #endif
706 sectionHeader = (Elf_Shdr*)((char*)(bi_symtab->ssym) +
707 (elfHeader->e_shoff));
708 nsection = elfHeader->e_shnum;
709 #ifdef VERBOSE_INIT_ARM
710 printf("Number of sections: %d\n", nsection);
711 #endif
712 for(; nsection > 0; nsection--, sectionHeader++) {
713 if (sectionHeader->sh_offset > 0 &&
714 (sectionHeader->sh_offset + sectionHeader->sh_size) > sz)
715 sz = sectionHeader->sh_offset + sectionHeader->sh_size;
716 }
717 #ifdef VERBOSE_INIT_ARM
718 printf("Max size of sections: %d\n", sz);
719 #endif
720 kerneldatasize += sz;
721 }
722
723 #ifdef VERBOSE_INIT_ARM
724 printf("Textsize: %u, kerneldatasize: %u\n", (uint)textsize,
725 (uint)kerneldatasize);
726 printf("&etext: 0x%x\n", (uint)&etext);
727 printf("&end: 0x%x\n", (uint)&end);
728 printf("KERNEL_TEXT_BASE: 0x%x\n", KERNEL_TEXT_BASE);
729 #endif
730
731 textsize = (textsize + PGOFSET) & ~PGOFSET;
732 kerneldatasize = (kerneldatasize + PGOFSET) & ~PGOFSET;
733
734 logical = KERNEL_OFFSET; /* offset of kernel in RAM */
735
736 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
737 physical_start + logical, textsize,
738 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE);
739 logical += pmap_map_chunk(l1pagetable, KERNEL_BASE + logical,
740 physical_start + logical, kerneldatasize - textsize,
741 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE);
742 }
743
744 #ifdef VERBOSE_INIT_ARM
745 printf("Constructing L2 page tables\n");
746 #endif
747
748 /* Map the stack pages */
749 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
750 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE,
751 PTE_CACHE);
752 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
753 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE,
754 PTE_CACHE);
755 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
756 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE,
757 PTE_CACHE);
758 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
759 UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE);
760
761 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
762 L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE);
763
764 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
765 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
766 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
767 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
768 }
769
770 /* Map the vector page. */
771 #if 0
772 /* MULTI-ICE requires that page 0 is NC/NB so that it can download the
773 * cache-clean code there. */
774 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa,
775 VM_PROT_READ | VM_PROT_WRITE, PTE_NOCACHE);
776 #else
777 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa,
778 VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE);
779 #endif
780
781 /*
782 * map integrated peripherals at same address in l1pagetable
783 * so that we can continue to use console.
784 */
785 pmap_devmap_bootstrap(l1pagetable, mini2440_devmap);
786
787 /*
788 * Now we have the real page tables in place so we can switch to them.
789 * Once this is done we will be running with the REAL kernel page
790 * tables.
791 */
792 /*
793 * Update the physical_freestart/physical_freeend/free_pages
794 * variables.
795 */
796 physical_freestart = physical_start +
797 (KERNEL_TEXT_BASE - KERNEL_BASE) + kerneldatasize;
798 physical_freeend = physical_end;
799 free_pages =
800 (physical_freeend - physical_freestart) / PAGE_SIZE;
801
802 /* Switch tables */
803 #ifdef VERBOSE_INIT_ARM
804 printf("freestart = 0x%08lx, free_pages = %d (0x%x)\n",
805 physical_freestart, free_pages, free_pages);
806 printf("switching to new L1 page table @%#lx...", kernel_l1pt.pv_pa);
807 #endif
808 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
809 cpu_setttb(kernel_l1pt.pv_pa, true);
810 cpu_tlb_flushID();
811 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
812
813 /*
814 * Moved from cpu_startup() as data_abort_handler() references
815 * this during uvm init
816 */
817 uvm_lwp_setuarea(&lwp0, kernelstack.pv_va);
818
819 #ifdef VERBOSE_INIT_ARM
820 printf("done!\n");
821 #endif
822
823 #ifdef VERBOSE_INIT_ARM
824 printf("bootstrap done.\n");
825 #endif
826
827 arm32_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL);
828
829 /*
830 * Pages were allocated during the secondary bootstrap for the
831 * stacks for different CPU modes.
832 * We must now set the r13 registers in the different CPU modes to
833 * point to these stacks.
834 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
835 * of the stack memory.
836 */
837 #ifdef VERBOSE_INIT_ARM
838 printf("init subsystems: stacks ");
839 #endif
840
841 set_stackptr(PSR_IRQ32_MODE,
842 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
843 set_stackptr(PSR_ABT32_MODE,
844 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
845 set_stackptr(PSR_UND32_MODE,
846 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
847
848 cpu_idcache_wbinv_all();
849
850 /*
851 * Well we should set a data abort handler.
852 * Once things get going this will change as we will need a proper
853 * handler.
854 * Until then we will use a handler that just panics but tells us
855 * why.
856 * Initialisation of the vectors will just panic on a data abort.
857 * This just fills in a slightly better one.
858 */
859 #ifdef VERBOSE_INIT_ARM
860 printf("vectors ");
861 #endif
862 data_abort_handler_address = (u_int)data_abort_handler;
863 prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
864 undefined_handler_address = (u_int)undefinedinstruction_bounce;
865
866 /* Initialise the undefined instruction handlers */
867 #ifdef VERBOSE_INIT_ARM
868 printf("undefined ");
869 #endif
870 undefined_init();
871
872 /* Load memory into UVM. */
873 #ifdef VERBOSE_INIT_ARM
874 printf("page ");
875 #endif
876 uvm_md_init();
877 uvm_page_physload(atop(physical_freestart), atop(physical_freeend),
878 atop(physical_freestart), atop(physical_freeend),
879 VM_FREELIST_DEFAULT);
880 uvm_page_physload(atop(SDRAM_START), atop(physical_freeend_low),
881 atop(SDRAM_START), atop(physical_freeend_low),
882 VM_FREELIST_DEFAULT);
883
884
885 /* Boot strap pmap telling it where managed kernel virtual memory is */
886 #ifdef VERBOSE_INIT_ARM
887 printf("pmap ");
888 #endif
889 pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE);
890
891 #ifdef VERBOSE_INIT_ARM
892 printf("done.\n");
893 #endif
894
895 #ifdef BOOTHOWTO
896 boothowto |= BOOTHOWTO;
897 #endif
898
899 #ifdef KGDB
900 if (boothowto & RB_KDB) {
901 kgdb_debug_init = 1;
902 kgdb_connect(1);
903 }
904 #endif
905
906 mini2440_ksyms(bi_symtab);
907
908 #ifdef DDB
909 /*db_machine_init();*/
910 if (boothowto & RB_KDB)
911 Debugger();
912 #endif
913
914 evbarm_device_register = mini2440_device_register;
915
916 /* We return the new stack pointer address */
917 return kernelstack.pv_va + USPACE_SVC_STACK_TOP;
918 }
919
920 void
consinit(void)921 consinit(void)
922 {
923 static int consinit_done = 0;
924 #if defined(SSCOM0CONSOLE) || defined(SSCOM1CONSOLE)
925 bus_space_tag_t iot = &s3c2xx0_bs_tag;
926 #endif
927 int pclk;
928
929 if (consinit_done != 0)
930 return;
931
932 consinit_done = 1;
933
934 s3c24x0_clock_freq2(CLKMAN_VBASE, NULL, NULL, &pclk);
935
936 #if NSSCOM > 0
937 #ifdef SSCOM0CONSOLE
938 if (0 == s3c2440_sscom_cnattach(iot, 0, comcnspeed,
939 pclk, comcnmode))
940 return;
941 #endif
942 #ifdef SSCOM1CONSOLE
943 if (0 == s3c2440_sscom_cnattach(iot, 1, comcnspeed,
944 pclk, comcnmode))
945 return;
946 #endif
947 #endif /* NSSCOM */
948 #if NCOM>0 && defined(CONCOMADDR)
949 if (comcnattach(&isa_io_bs_tag, CONCOMADDR, comcnspeed,
950 COM_FREQ, COM_TYPE_NORMAL, comcnmode))
951 panic("can't init serial console @%x", CONCOMADDR);
952 return;
953 #endif
954
955 consinit_done = 0;
956 }
957
958
959 #ifdef KGDB
960
961 #if (NSSCOM > 0)
962
963 #ifdef KGDB_DEVNAME
964 const char kgdb_devname[] = KGDB_DEVNAME;
965 #else
966 const char kgdb_devname[] = "";
967 #endif
968
969 #ifndef KGDB_DEVMODE
970 #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE|CSTOPB|PARENB))|CS8) /* 8N1 */
971 #endif
972 int kgdb_sscom_mode = KGDB_DEVMODE;
973
974 #endif /* NSSCOM */
975
976 void
kgdb_port_init(void)977 kgdb_port_init(void)
978 {
979 #if (NSSCOM > 0)
980 int unit = -1;
981 int pclk;
982
983 if (strcmp(kgdb_devname, "sscom0") == 0)
984 unit = 0;
985 else if (strcmp(kgdb_devname, "sscom1") == 0)
986 unit = 1;
987
988 if (unit >= 0) {
989 s3c24x0_clock_freq2(CLKMAN_VBASE, NULL, NULL, &pclk);
990
991 s3c2440_sscom_kgdb_attach(&s3c2xx0_bs_tag,
992 unit, kgdb_rate, pclk, kgdb_sscom_mode);
993 }
994 #endif
995 }
996 #endif
997
998
999 static struct arm32_dma_range mini2440_dma_ranges[1];
1000
1001 bus_dma_tag_t
s3c2xx0_bus_dma_init(struct arm32_bus_dma_tag * dma_tag_template)1002 s3c2xx0_bus_dma_init(struct arm32_bus_dma_tag *dma_tag_template)
1003 {
1004 extern paddr_t physical_start, physical_end;
1005 struct arm32_bus_dma_tag *dmat;
1006
1007 mini2440_dma_ranges[0].dr_sysbase = physical_start;
1008 mini2440_dma_ranges[0].dr_busbase = physical_start;
1009 mini2440_dma_ranges[0].dr_len = physical_end - physical_start;
1010
1011 #if 1
1012 dmat = dma_tag_template;
1013 #else
1014 dmat = malloc(sizeof *dmat, M_DEVBUF, M_WAITOK);
1015 *dmat = *dma_tag_template;
1016 #endif
1017
1018 dmat->_ranges = mini2440_dma_ranges;
1019 dmat->_nranges = 1;
1020
1021 return dmat;
1022 }
1023
1024 void
mini2440_ksyms(struct btinfo_symtab * bi_symtab)1025 mini2440_ksyms(struct btinfo_symtab *bi_symtab)
1026 {
1027 #if NKSYMS || defined(DDB) || defined(LKM)
1028 extern int end;
1029
1030 #ifdef DDB
1031 db_machine_init();
1032 #endif
1033 if (bi_symtab == NULL) {
1034 return;
1035 }
1036 #ifdef VERBOSE_INIT_ARM
1037 printf("Got symbol table. nsym=%d, ssym=%p, esym=%p\n",
1038 bi_symtab->nsym,
1039 bi_symtab->ssym,
1040 bi_symtab->esym);
1041 #endif
1042
1043 ksyms_addsyms_elf(bi_symtab->nsym,
1044 (int*)bi_symtab->ssym,
1045 (int*)bi_symtab->esym);
1046 #endif
1047 }
1048
1049 void *
lookup_bootinfo(int type)1050 lookup_bootinfo(int type)
1051 {
1052 struct btinfo_common *bt;
1053 struct btinfo_common *help = (struct btinfo_common *)bootinfo;
1054
1055 if (help->next == 0)
1056 return (NULL); /* bootinfo[] was not made */
1057 do {
1058 bt = help;
1059 if (bt->type == type)
1060 return (help);
1061 help = (struct btinfo_common *)((char*)help + bt->next);
1062 } while (bt->next &&
1063 (size_t)help < (size_t)bootinfo + BOOTINFO_MAXSIZE);
1064
1065 return (NULL);
1066 }
1067
1068
1069 extern char *booted_kernel;
1070
1071 static void
mini2440_device_register(device_t dev,void * aux)1072 mini2440_device_register(device_t dev, void *aux) {
1073 if (device_class(dev) == DV_IFNET) {
1074 #ifndef MEMORY_DISK_IS_ROOT
1075 if (bi_rdev != NULL && device_is_a(dev, bi_rdev->devname) ) {
1076 booted_device = dev;
1077 rootfstype = MOUNT_NFS;
1078 if( bi_path != NULL ) {
1079 booted_kernel = bi_path->bootpath;
1080 }
1081 }
1082 #endif
1083 if (bi_net != NULL && device_is_a(dev, bi_net->devname)) {
1084 prop_data_t pd;
1085 pd = prop_data_create_data_nocopy(bi_net->mac_address, ETHER_ADDR_LEN);
1086 KASSERT(pd != NULL);
1087 if (prop_dictionary_set(device_properties(dev), "mac-address", pd) == false) {
1088 printf("WARNING: Unable to set mac-address property for %s\n", device_xname(dev));
1089 }
1090 prop_object_release(pd);
1091 bi_net = NULL;
1092 }
1093 }
1094 #ifndef MEMORY_DISK_IS_ROOT
1095 if (bi_rdev != NULL && device_class(dev) == DV_DISK
1096 && device_is_a(dev, bi_rdev->devname)
1097 && device_unit(dev) == bi_rdev->cookie) {
1098 booted_device = dev;
1099 booted_partition = bi_rdev->partition;
1100 rootfstype = ROOT_FSTYPE_ANY;
1101 if( bi_path != NULL ) {
1102 booted_kernel = bi_path->bootpath;
1103 }
1104 }
1105 #endif
1106 }
1107