1 /* $NetBSD: hpc_machdep.c,v 1.70 2003/09/16 08:18:22 agc Exp $ */
2
3 /*-
4 * Copyright (c) 1994-1998 Mark Brinicombe.
5 * Copyright (c) 1994 Brini.
6 * All rights reserved.
7 *
8 * This code is derived from software written for Brini by Mark Brinicombe
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by Brini.
21 * 4. The name of the company nor the name of the author may be used to
22 * endorse or promote products derived from this software without specific
23 * prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
28 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
29 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
30 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
31 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * RiscBSD kernel project
38 *
39 * machdep.c
40 *
41 * Machine dependant functions for kernel setup
42 *
43 * This file needs a lot of work.
44 *
45 * Created : 17/09/94
46 */
47
48 #include "opt_msgbuf.h"
49 #include "opt_ddb.h"
50
51 #include <sys/cdefs.h>
52 __FBSDID("$FreeBSD$");
53
54 #define _ARM32_BUS_DMA_PRIVATE
55 #include <sys/param.h>
56 #include <sys/systm.h>
57 #include <sys/sysproto.h>
58 #include <sys/signalvar.h>
59 #include <sys/imgact.h>
60 #include <sys/kernel.h>
61 #include <sys/ktr.h>
62 #include <sys/linker.h>
63 #include <sys/lock.h>
64 #include <sys/malloc.h>
65 #include <sys/mutex.h>
66 #include <sys/pcpu.h>
67 #include <sys/proc.h>
68 #include <sys/ptrace.h>
69 #include <sys/cons.h>
70 #include <sys/bio.h>
71 #include <sys/bus.h>
72 #include <sys/buf.h>
73 #include <sys/exec.h>
74 #include <sys/kdb.h>
75 #include <sys/msgbuf.h>
76 #include <machine/reg.h>
77 #include <machine/cpu.h>
78
79 #include <vm/vm.h>
80 #include <vm/pmap.h>
81 #include <vm/vm.h>
82 #include <vm/vm_object.h>
83 #include <vm/vm_page.h>
84 #include <vm/vm_pager.h>
85 #include <vm/vm_map.h>
86 #include <vm/vnode_pager.h>
87 #include <machine/pmap.h>
88 #include <machine/vmparam.h>
89 #include <machine/pcb.h>
90 #include <machine/undefined.h>
91 #include <machine/machdep.h>
92 #include <machine/metadata.h>
93 #include <machine/armreg.h>
94 #include <machine/bus.h>
95 #include <sys/reboot.h>
96
97 #include <arm/xscale/ixp425/ixp425reg.h>
98 #include <arm/xscale/ixp425/ixp425var.h>
99
100 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */
101 #define KERNEL_PT_IO 1
102 #define KERNEL_PT_IO_NUM 3
103 #define KERNEL_PT_BEFOREKERN KERNEL_PT_IO + KERNEL_PT_IO_NUM
104 #define KERNEL_PT_AFKERNEL KERNEL_PT_BEFOREKERN + 1 /* L2 table for mapping after kernel */
105 #define KERNEL_PT_AFKERNEL_NUM 9
106
107 /* this should be evenly divisable by PAGE_SIZE / L2_TABLE_SIZE_REAL (or 4) */
108 #define NUM_KERNEL_PTS (KERNEL_PT_AFKERNEL + KERNEL_PT_AFKERNEL_NUM)
109
110 /* Define various stack sizes in pages */
111 #define IRQ_STACK_SIZE 1
112 #define ABT_STACK_SIZE 1
113 #ifdef IPKDB
114 #define UND_STACK_SIZE 2
115 #else
116 #define UND_STACK_SIZE 1
117 #endif
118
119 extern u_int data_abort_handler_address;
120 extern u_int prefetch_abort_handler_address;
121 extern u_int undefined_handler_address;
122
123 struct pv_addr kernel_pt_table[NUM_KERNEL_PTS];
124
125 extern void *_end;
126
127 extern vm_offset_t sa1_cache_clean_addr;
128
129 extern int *end;
130
131 struct pcpu __pcpu;
132 struct pcpu *pcpup = &__pcpu;
133
134 /* Physical and virtual addresses for some global pages */
135
136 vm_paddr_t phys_avail[10];
137 vm_paddr_t dump_avail[4];
138 vm_offset_t physical_pages;
139 vm_offset_t clean_sva, clean_eva;
140
141 struct pv_addr systempage;
142 struct pv_addr msgbufpv;
143 struct pv_addr irqstack;
144 struct pv_addr undstack;
145 struct pv_addr abtstack;
146 struct pv_addr kernelstack;
147 struct pv_addr minidataclean;
148
149 static struct trapframe proc0_tf;
150
151 /* Static device mappings. */
152 static const struct pmap_devmap ixp425_devmap[] = {
153 /* Physical/Virtual address for I/O space */
154 {
155 IXP425_IO_VBASE,
156 IXP425_IO_HWBASE,
157 IXP425_IO_SIZE,
158 VM_PROT_READ|VM_PROT_WRITE,
159 PTE_NOCACHE,
160 },
161
162 /* Expansion Bus */
163 {
164 IXP425_EXP_VBASE,
165 IXP425_EXP_HWBASE,
166 IXP425_EXP_SIZE,
167 VM_PROT_READ|VM_PROT_WRITE,
168 PTE_NOCACHE,
169 },
170
171 /* IXP425 PCI Configuration */
172 {
173 IXP425_PCI_VBASE,
174 IXP425_PCI_HWBASE,
175 IXP425_PCI_SIZE,
176 VM_PROT_READ|VM_PROT_WRITE,
177 PTE_NOCACHE,
178 },
179
180 /* SDRAM Controller */
181 {
182 IXP425_MCU_VBASE,
183 IXP425_MCU_HWBASE,
184 IXP425_MCU_SIZE,
185 VM_PROT_READ|VM_PROT_WRITE,
186 PTE_NOCACHE,
187 },
188
189 /* PCI Memory Space */
190 {
191 IXP425_PCI_MEM_VBASE,
192 IXP425_PCI_MEM_HWBASE,
193 IXP425_PCI_MEM_SIZE,
194 VM_PROT_READ|VM_PROT_WRITE,
195 PTE_NOCACHE,
196 },
197 /* NPE-A Memory Space */
198 {
199 IXP425_NPE_A_VBASE,
200 IXP425_NPE_A_HWBASE,
201 IXP425_NPE_A_SIZE,
202 VM_PROT_READ|VM_PROT_WRITE,
203 PTE_NOCACHE,
204 },
205 /* NPE-B Memory Space */
206 {
207 IXP425_NPE_B_VBASE,
208 IXP425_NPE_B_HWBASE,
209 IXP425_NPE_B_SIZE,
210 VM_PROT_READ|VM_PROT_WRITE,
211 PTE_NOCACHE,
212 },
213 /* NPE-C Memory Space */
214 {
215 IXP425_NPE_C_VBASE,
216 IXP425_NPE_C_HWBASE,
217 IXP425_NPE_C_SIZE,
218 VM_PROT_READ|VM_PROT_WRITE,
219 PTE_NOCACHE,
220 },
221 /* MAC-A Memory Space */
222 {
223 IXP425_MAC_A_VBASE,
224 IXP425_MAC_A_HWBASE,
225 IXP425_MAC_A_SIZE,
226 VM_PROT_READ|VM_PROT_WRITE,
227 PTE_NOCACHE,
228 },
229 /* MAC-B Memory Space */
230 {
231 IXP425_MAC_B_VBASE,
232 IXP425_MAC_B_HWBASE,
233 IXP425_MAC_B_SIZE,
234 VM_PROT_READ|VM_PROT_WRITE,
235 PTE_NOCACHE,
236 },
237 /* Q-Mgr Memory Space */
238 {
239 IXP425_QMGR_VBASE,
240 IXP425_QMGR_HWBASE,
241 IXP425_QMGR_SIZE,
242 VM_PROT_READ|VM_PROT_WRITE,
243 PTE_NOCACHE,
244 },
245
246 {
247 0,
248 0,
249 0,
250 0,
251 0,
252 }
253 };
254
255 #define SDRAM_START 0x10000000
256
257 #ifdef DDB
258 extern vm_offset_t ksym_start, ksym_end;
259 #endif
260
261 extern vm_offset_t xscale_cache_clean_addr;
262
263 void *
264 initarm(void *arg, void *arg2)
265 {
266 struct pv_addr kernel_l1pt;
267 int loop;
268 u_int l1pagetable;
269 vm_offset_t freemempos;
270 vm_offset_t freemem_pt;
271 vm_offset_t afterkern;
272 vm_offset_t freemem_after;
273 vm_offset_t lastaddr;
274 #ifdef DDB
275 vm_offset_t zstart = 0, zend = 0;
276 #endif
277 int i = 0;
278 uint32_t fake_preload[35];
279 uint32_t memsize;
280
281 i = 0;
282
283 set_cpufuncs();
284 fake_preload[i++] = MODINFO_NAME;
285 fake_preload[i++] = strlen("elf kernel") + 1;
286 strcpy((char*)&fake_preload[i++], "elf kernel");
287 i += 2;
288 fake_preload[i++] = MODINFO_TYPE;
289 fake_preload[i++] = strlen("elf kernel") + 1;
290 strcpy((char*)&fake_preload[i++], "elf kernel");
291 i += 2;
292 fake_preload[i++] = MODINFO_ADDR;
293 fake_preload[i++] = sizeof(vm_offset_t);
294 fake_preload[i++] = KERNBASE + 0x00200000;
295 fake_preload[i++] = MODINFO_SIZE;
296 fake_preload[i++] = sizeof(uint32_t);
297 fake_preload[i++] = (uint32_t)&end - KERNBASE - 0x00200000;
298 #ifdef DDB
299 if (*(uint32_t *)KERNVIRTADDR == MAGIC_TRAMP_NUMBER) {
300 fake_preload[i++] = MODINFO_METADATA|MODINFOMD_SSYM;
301 fake_preload[i++] = sizeof(vm_offset_t);
302 fake_preload[i++] = *(uint32_t *)(KERNVIRTADDR + 4);
303 fake_preload[i++] = MODINFO_METADATA|MODINFOMD_ESYM;
304 fake_preload[i++] = sizeof(vm_offset_t);
305 fake_preload[i++] = *(uint32_t *)(KERNVIRTADDR + 8);
306 lastaddr = *(uint32_t *)(KERNVIRTADDR + 8);
307 zend = lastaddr;
308 zstart = *(uint32_t *)(KERNVIRTADDR + 4);
309 ksym_start = zstart;
310 ksym_end = zend;
311 } else
312 #endif
313 lastaddr = (vm_offset_t)&end;
314
315 fake_preload[i++] = 0;
316 fake_preload[i] = 0;
317 preload_metadata = (void *)fake_preload;
318
319
320 pcpu_init(pcpup, 0, sizeof(struct pcpu));
321 PCPU_SET(curthread, &thread0);
322
323 #define KERNEL_TEXT_BASE (KERNBASE + 0x00200000)
324 freemempos = 0x10200000;
325 /* Define a macro to simplify memory allocation */
326 #define valloc_pages(var, np) \
327 alloc_pages((var).pv_pa, (np)); \
328 (var).pv_va = (var).pv_pa + 0xb0000000;
329
330 #define alloc_pages(var, np) \
331 freemempos -= (np * PAGE_SIZE); \
332 (var) = freemempos; \
333 memset((char *)(var), 0, ((np) * PAGE_SIZE));
334
335 while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0)
336 freemempos -= PAGE_SIZE;
337 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
338 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
339 if (!(loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) {
340 valloc_pages(kernel_pt_table[loop],
341 L2_TABLE_SIZE / PAGE_SIZE);
342 } else {
343 kernel_pt_table[loop].pv_pa = freemempos +
344 (loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL)) *
345 L2_TABLE_SIZE_REAL;
346 kernel_pt_table[loop].pv_va =
347 kernel_pt_table[loop].pv_pa + 0xb0000000;
348 }
349 }
350 freemem_pt = freemempos;
351 freemempos = 0x10100000;
352 /*
353 * Allocate a page for the system page mapped to V0x00000000
354 * This page will just contain the system vectors and can be
355 * shared by all processes.
356 */
357 valloc_pages(systempage, 1);
358
359 /* Allocate stacks for all modes */
360 valloc_pages(irqstack, IRQ_STACK_SIZE);
361 valloc_pages(abtstack, ABT_STACK_SIZE);
362 valloc_pages(undstack, UND_STACK_SIZE);
363 valloc_pages(kernelstack, KSTACK_PAGES);
364 alloc_pages(minidataclean.pv_pa, 1);
365 valloc_pages(msgbufpv, round_page(MSGBUF_SIZE) / PAGE_SIZE);
366 #ifdef ARM_USE_SMALL_ALLOC
367 freemempos -= PAGE_SIZE;
368 freemem_pt = trunc_page(freemem_pt);
369 freemem_after = freemempos - ((freemem_pt - 0x10100000) /
370 PAGE_SIZE) * sizeof(struct arm_small_page);
371 arm_add_smallalloc_pages((void *)(freemem_after + 0xb0000000)
372 , (void *)0xc0100000, freemem_pt - 0x10100000, 1);
373 freemem_after -= ((freemem_after - 0x10001000) / PAGE_SIZE) *
374 sizeof(struct arm_small_page);
375 arm_add_smallalloc_pages((void *)(freemem_after + 0xb0000000)
376 , (void *)0xc0001000, trunc_page(freemem_after) - 0x10001000, 0);
377 freemempos = trunc_page(freemem_after);
378 freemempos -= PAGE_SIZE;
379 #endif
380 /*
381 * Allocate memory for the l1 and l2 page tables. The scheme to avoid
382 * wasting memory by allocating the l1pt on the first 16k memory was
383 * taken from NetBSD rpc_machdep.c. NKPT should be greater than 12 for
384 * this to work (which is supposed to be the case).
385 */
386
387 /*
388 * Now we start construction of the L1 page table
389 * We start by mapping the L2 page tables into the L1.
390 * This means that we can replace L1 mappings later on if necessary
391 */
392 l1pagetable = kernel_l1pt.pv_va;
393
394 /* Map the L2 pages tables in the L1 page table */
395 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00100000 - 1),
396 &kernel_pt_table[KERNEL_PT_SYS]);
397 pmap_link_l2pt(l1pagetable, IXP425_IO_VBASE,
398 &kernel_pt_table[KERNEL_PT_IO]);
399 pmap_link_l2pt(l1pagetable, IXP425_MCU_VBASE,
400 &kernel_pt_table[KERNEL_PT_IO + 1]);
401 pmap_link_l2pt(l1pagetable, IXP425_PCI_MEM_VBASE,
402 &kernel_pt_table[KERNEL_PT_IO + 2]);
403 pmap_link_l2pt(l1pagetable, KERNBASE,
404 &kernel_pt_table[KERNEL_PT_BEFOREKERN]);
405 pmap_map_chunk(l1pagetable, KERNBASE, SDRAM_START, 0x100000,
406 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
407 pmap_map_chunk(l1pagetable, KERNBASE + 0x100000, SDRAM_START + 0x100000,
408 0x100000, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
409 pmap_map_chunk(l1pagetable, KERNBASE + 0x200000, SDRAM_START + 0x200000,
410 (((uint32_t)(lastaddr) - KERNBASE - 0x200000) + L1_S_SIZE) & ~(L1_S_SIZE - 1),
411 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
412 freemem_after = ((int)lastaddr + PAGE_SIZE) & ~(PAGE_SIZE - 1);
413 afterkern = round_page(((vm_offset_t)lastaddr + L1_S_SIZE) & ~(L1_S_SIZE
414 - 1));
415 for (i = 0; i < KERNEL_PT_AFKERNEL_NUM; i++) {
416 pmap_link_l2pt(l1pagetable, afterkern + i * 0x00100000,
417 &kernel_pt_table[KERNEL_PT_AFKERNEL + i]);
418 }
419 pmap_map_entry(l1pagetable, afterkern, minidataclean.pv_pa,
420 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
421
422
423 #ifdef ARM_USE_SMALL_ALLOC
424 if ((freemem_after + 2 * PAGE_SIZE) <= afterkern) {
425 arm_add_smallalloc_pages((void *)(freemem_after),
426 (void*)(freemem_after + PAGE_SIZE),
427 afterkern - (freemem_after + PAGE_SIZE), 0);
428
429 }
430 #endif
431
432 /* Map the Mini-Data cache clean area. */
433 xscale_setup_minidata(l1pagetable, afterkern,
434 minidataclean.pv_pa);
435
436 /* Map the vector page. */
437 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
438 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
439 pmap_devmap_bootstrap(l1pagetable, ixp425_devmap);
440 /*
441 * Give the XScale global cache clean code an appropriately
442 * sized chunk of unmapped VA space starting at 0xff000000
443 * (our device mappings end before this address).
444 */
445 xscale_cache_clean_addr = 0xff000000U;
446
447 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
448 setttb(kernel_l1pt.pv_pa);
449 cpu_tlb_flushID();
450 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
451 /*
452 * Pages were allocated during the secondary bootstrap for the
453 * stacks for different CPU modes.
454 * We must now set the r13 registers in the different CPU modes to
455 * point to these stacks.
456 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
457 * of the stack memory.
458 */
459
460
461 set_stackptr(PSR_IRQ32_MODE,
462 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
463 set_stackptr(PSR_ABT32_MODE,
464 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
465 set_stackptr(PSR_UND32_MODE,
466 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
467
468
469
470 /*
471 * We must now clean the cache again....
472 * Cleaning may be done by reading new data to displace any
473 * dirty data in the cache. This will have happened in setttb()
474 * but since we are boot strapping the addresses used for the read
475 * may have just been remapped and thus the cache could be out
476 * of sync. A re-clean after the switch will cure this.
477 * After booting there are no gross reloations of the kernel thus
478 * this problem will not occur after initarm().
479 */
480 cpu_idcache_wbinv_all();
481 /*
482 * Fetch the SDRAM start/size from the ixp425 SDRAM configration
483 * registers.
484 */
485 cninit();
486 memsize = ixp425_sdram_size();
487 physmem = memsize / PAGE_SIZE;
488
489 /* Set stack for exception handlers */
490
491 data_abort_handler_address = (u_int)data_abort_handler;
492 prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
493 undefined_handler_address = (u_int)undefinedinstruction_bounce;
494 undefined_init();
495
496 proc_linkup(&proc0, &ksegrp0, &thread0);
497 thread0.td_kstack = kernelstack.pv_va;
498 thread0.td_pcb = (struct pcb *)
499 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
500 thread0.td_pcb->pcb_flags = 0;
501 thread0.td_frame = &proc0_tf;
502 pcpup->pc_curpcb = thread0.td_pcb;
503
504 /* Enable MMU, I-cache, D-cache, write buffer. */
505
506 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
507
508
509
510 pmap_curmaxkvaddr = afterkern + PAGE_SIZE;
511 dump_avail[0] = 0x10000000;
512 dump_avail[1] = 0x10000000 + memsize;
513 dump_avail[2] = 0;
514 dump_avail[3] = 0;
515
516 pmap_bootstrap(pmap_curmaxkvaddr,
517 0xd0000000, &kernel_l1pt);
518 msgbufp = (void*)msgbufpv.pv_va;
519 msgbufinit(msgbufp, MSGBUF_SIZE);
520 mutex_init();
521
522 i = 0;
523 #ifdef ARM_USE_SMALL_ALLOC
524 phys_avail[i++] = 0x10000000;
525 phys_avail[i++] = 0x10001000; /*
526 *XXX: Gross hack to get our
527 * pages in the vm_page_array
528 . */
529 #endif
530 phys_avail[i++] = round_page(virtual_avail - KERNBASE + SDRAM_START);
531 phys_avail[i++] = trunc_page(0x10000000 + memsize - 1);
532 phys_avail[i++] = 0;
533 phys_avail[i] = 0;
534
535 /* Do basic tuning, hz etc */
536 init_param1();
537 init_param2(physmem);
538 kdb_init();
539 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP -
540 sizeof(struct pcb)));
541 }
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