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
50 #include <sys/cdefs.h>
51 __FBSDID("$FreeBSD: releng/6.0/sys/arm/xscale/i80321/iq31244_machdep.c 147545 2005-06-23 11:40:45Z cognet $");
52
53 #define _ARM32_BUS_DMA_PRIVATE
54 #include <sys/param.h>
55 #include <sys/systm.h>
56 #include <sys/sysproto.h>
57 #include <sys/signalvar.h>
58 #include <sys/imgact.h>
59 #include <sys/kernel.h>
60 #include <sys/ktr.h>
61 #include <sys/linker.h>
62 #include <sys/lock.h>
63 #include <sys/malloc.h>
64 #include <sys/mutex.h>
65 #include <sys/pcpu.h>
66 #include <sys/proc.h>
67 #include <sys/ptrace.h>
68 #include <sys/cons.h>
69 #include <sys/bio.h>
70 #include <sys/bus.h>
71 #include <sys/buf.h>
72 #include <sys/exec.h>
73 #include <sys/kdb.h>
74 #include <sys/msgbuf.h>
75 #include <machine/reg.h>
76 #include <machine/cpu.h>
77
78 #include <vm/vm.h>
79 #include <vm/pmap.h>
80 #include <vm/vm.h>
81 #include <vm/vm_object.h>
82 #include <vm/vm_page.h>
83 #include <vm/vm_pager.h>
84 #include <vm/vm_map.h>
85 #include <vm/vnode_pager.h>
86 #include <machine/pmap.h>
87 #include <machine/vmparam.h>
88 #include <machine/pcb.h>
89 #include <machine/undefined.h>
90 #include <machine/machdep.h>
91 #include <machine/metadata.h>
92 #include <machine/armreg.h>
93 #include <machine/bus.h>
94 #include <sys/reboot.h>
95
96 #include <arm/xscale/i80321/i80321reg.h>
97 #include <arm/xscale/i80321/i80321var.h>
98 #include <arm/xscale/i80321/iq80321reg.h>
99 #include <arm/xscale/i80321/obiovar.h>
100
101 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */
102 #define KERNEL_PT_IOPXS 1
103 #define KERNEL_PT_BEFOREKERN 2
104 #define KERNEL_PT_AFKERNEL 3 /* 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 physical_start;
138 vm_paddr_t physical_end;
139 vm_offset_t physical_pages;
140 vm_offset_t clean_sva, clean_eva;
141
142 struct pv_addr systempage;
143 struct pv_addr msgbufpv;
144 struct pv_addr irqstack;
145 struct pv_addr undstack;
146 struct pv_addr abtstack;
147 struct pv_addr kernelstack;
148 struct pv_addr minidataclean;
149
150 void enable_mmu(vm_offset_t);
151 static struct trapframe proc0_tf;
152
153 #define IQ80321_OBIO_BASE 0xfe800000UL
154 #define IQ80321_OBIO_SIZE 0x00100000UL
155 /* Static device mappings. */
156 static const struct pmap_devmap iq80321_devmap[] = {
157 /*
158 * Map the on-board devices VA == PA so that we can access them
159 * with the MMU on or off.
160 */
161 {
162 IQ80321_OBIO_BASE,
163 IQ80321_OBIO_BASE,
164 IQ80321_OBIO_SIZE,
165 VM_PROT_READ|VM_PROT_WRITE,
166 PTE_NOCACHE,
167 },
168 {
169 IQ80321_IOW_VBASE,
170 VERDE_OUT_XLATE_IO_WIN0_BASE,
171 VERDE_OUT_XLATE_IO_WIN_SIZE,
172 VM_PROT_READ|VM_PROT_WRITE,
173 PTE_NOCACHE,
174 },
175
176 {
177 IQ80321_80321_VBASE,
178 VERDE_PMMR_BASE,
179 VERDE_PMMR_SIZE,
180 VM_PROT_READ|VM_PROT_WRITE,
181 PTE_NOCACHE,
182 },
183 {
184 0,
185 0,
186 0,
187 0,
188 0,
189 }
190 };
191
192 #define SDRAM_START 0xa0000000
193
194 extern vm_offset_t xscale_cache_clean_addr;
195
196 void *
197 initarm(void *arg, void *arg2)
198 {
199 struct pv_addr kernel_l1pt;
200 int loop;
201 u_int kerneldatasize, symbolsize;
202 u_int l1pagetable;
203 vm_offset_t freemempos;
204 vm_offset_t freemem_pt;
205 vm_offset_t afterkern;
206 vm_offset_t freemem_after;
207 int i = 0;
208 uint32_t fake_preload[35];
209 uint32_t memsize, memstart;
210
211 i = 0;
212
213 set_cpufuncs();
214 fake_preload[i++] = MODINFO_NAME;
215 fake_preload[i++] = strlen("elf kernel") + 1;
216 strcpy((char*)&fake_preload[i++], "elf kernel");
217 i += 2;
218 fake_preload[i++] = MODINFO_TYPE;
219 fake_preload[i++] = strlen("elf kernel") + 1;
220 strcpy((char*)&fake_preload[i++], "elf kernel");
221 i += 2;
222 fake_preload[i++] = MODINFO_ADDR;
223 fake_preload[i++] = sizeof(vm_offset_t);
224 fake_preload[i++] = KERNBASE + 0x00200000;
225 fake_preload[i++] = MODINFO_SIZE;
226 fake_preload[i++] = sizeof(uint32_t);
227 fake_preload[i++] = (uint32_t)&end - KERNBASE - 0x00200000;
228 fake_preload[i++] = 0;
229 fake_preload[i] = 0;
230 preload_metadata = (void *)fake_preload;
231
232
233 pcpu_init(pcpup, 0, sizeof(struct pcpu));
234 PCPU_SET(curthread, &thread0);
235
236 physical_start = (vm_offset_t) SDRAM_START;
237 physical_end = (vm_offset_t) &end + SDRAM_START - 0xc0000000;
238 #define KERNEL_TEXT_BASE (KERNBASE + 0x00200000)
239 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE;
240 symbolsize = 0;
241 freemempos = 0xa0200000;
242 /* Define a macro to simplify memory allocation */
243 #define valloc_pages(var, np) \
244 alloc_pages((var).pv_pa, (np)); \
245 (var).pv_va = (var).pv_pa + 0x20000000;
246
247 #define alloc_pages(var, np) \
248 freemempos -= (np * PAGE_SIZE); \
249 (var) = freemempos; \
250 memset((char *)(var), 0, ((np) * PAGE_SIZE));
251
252 while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0)
253 freemempos -= PAGE_SIZE;
254 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
255 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
256 if (!(loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) {
257 valloc_pages(kernel_pt_table[loop],
258 L2_TABLE_SIZE / PAGE_SIZE);
259 } else {
260 kernel_pt_table[loop].pv_pa = freemempos -
261 (loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL)) *
262 L2_TABLE_SIZE_REAL;
263 kernel_pt_table[loop].pv_va =
264 kernel_pt_table[loop].pv_pa + 0x20000000;
265 }
266 i++;
267 }
268 freemempos -= 2 * PAGE_SIZE;
269
270 freemem_pt = freemempos;
271 freemempos = 0xa0100000;
272 /*
273 * Allocate a page for the system page mapped to V0x00000000
274 * This page will just contain the system vectors and can be
275 * shared by all processes.
276 */
277 valloc_pages(systempage, 1);
278
279 /* Allocate stacks for all modes */
280 valloc_pages(irqstack, IRQ_STACK_SIZE);
281 valloc_pages(abtstack, ABT_STACK_SIZE);
282 valloc_pages(undstack, UND_STACK_SIZE);
283 valloc_pages(kernelstack, KSTACK_PAGES);
284 alloc_pages(minidataclean.pv_pa, 1);
285 valloc_pages(msgbufpv, round_page(MSGBUF_SIZE) / PAGE_SIZE);
286 #ifdef ARM_USE_SMALL_ALLOC
287 freemempos -= PAGE_SIZE;
288 freemem_pt = trunc_page(freemem_pt);
289 freemem_after = freemempos - ((freemem_pt - 0xa0100000) /
290 PAGE_SIZE) * sizeof(struct arm_small_page);
291 arm_add_smallalloc_pages((void *)(freemem_after + 0x20000000)
292 , (void *)0xc0100000, freemem_pt - 0xa0100000, 1);
293 freemem_after -= ((freemem_after - 0xa0001000) / PAGE_SIZE) *
294 sizeof(struct arm_small_page);
295 arm_add_smallalloc_pages((void *)(freemem_after + 0x20000000)
296 , (void *)0xc0001000, trunc_page(freemem_after) - 0xa0001000, 0);
297 freemempos = trunc_page(freemem_after);
298 freemempos -= PAGE_SIZE;
299 #endif
300 /*
301 * Allocate memory for the l1 and l2 page tables. The scheme to avoid
302 * wasting memory by allocating the l1pt on the first 16k memory was
303 * taken from NetBSD rpc_machdep.c. NKPT should be greater than 12 for
304 * this to work (which is supposed to be the case).
305 */
306
307 /*
308 * Now we start construction of the L1 page table
309 * We start by mapping the L2 page tables into the L1.
310 * This means that we can replace L1 mappings later on if necessary
311 */
312 l1pagetable = kernel_l1pt.pv_va;
313
314 /* Map the L2 pages tables in the L1 page table */
315 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00100000 - 1),
316 &kernel_pt_table[KERNEL_PT_SYS]);
317 pmap_link_l2pt(l1pagetable, IQ80321_IOPXS_VBASE,
318 &kernel_pt_table[KERNEL_PT_IOPXS]);
319 pmap_link_l2pt(l1pagetable, KERNBASE,
320 &kernel_pt_table[KERNEL_PT_BEFOREKERN]);
321 pmap_map_chunk(l1pagetable, KERNBASE, SDRAM_START, 0x100000,
322 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
323 pmap_map_chunk(l1pagetable, KERNBASE + 0x100000, SDRAM_START + 0x100000,
324 0x100000, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
325 pmap_map_chunk(l1pagetable, KERNBASE + 0x200000, SDRAM_START + 0x200000,
326 (((uint32_t)(&end) - KERNBASE - 0x200000) + L1_S_SIZE) & ~(L1_S_SIZE - 1),
327 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
328 freemem_after = ((int)&end + PAGE_SIZE) & ~(PAGE_SIZE - 1);
329 afterkern = round_page(((vm_offset_t)&end + L1_S_SIZE) & ~(L1_S_SIZE
330 - 1));
331 for (i = 0; i < KERNEL_PT_AFKERNEL_NUM; i++) {
332 pmap_link_l2pt(l1pagetable, afterkern + i * 0x00100000,
333 &kernel_pt_table[KERNEL_PT_AFKERNEL + i]);
334 }
335 pmap_map_entry(l1pagetable, afterkern, minidataclean.pv_pa,
336 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
337
338
339 #ifdef ARM_USE_SMALL_ALLOC
340 if ((freemem_after + 2 * PAGE_SIZE) <= afterkern) {
341 arm_add_smallalloc_pages((void *)(freemem_after),
342 (void*)(freemem_after + PAGE_SIZE),
343 afterkern - (freemem_after + PAGE_SIZE), 0);
344
345 }
346 #endif
347
348 /* Map the Mini-Data cache clean area. */
349 xscale_setup_minidata(l1pagetable, afterkern,
350 minidataclean.pv_pa);
351
352 /* Map the vector page. */
353 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
354 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
355 pmap_devmap_bootstrap(l1pagetable, iq80321_devmap);
356 /*
357 * Give the XScale global cache clean code an appropriately
358 * sized chunk of unmapped VA space starting at 0xff000000
359 * (our device mappings end before this address).
360 */
361 xscale_cache_clean_addr = 0xff000000U;
362
363 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
364 setttb(kernel_l1pt.pv_pa);
365 cpu_tlb_flushID();
366 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
367 /*
368 * Pages were allocated during the secondary bootstrap for the
369 * stacks for different CPU modes.
370 * We must now set the r13 registers in the different CPU modes to
371 * point to these stacks.
372 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
373 * of the stack memory.
374 */
375
376
377 set_stackptr(PSR_IRQ32_MODE,
378 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
379 set_stackptr(PSR_ABT32_MODE,
380 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
381 set_stackptr(PSR_UND32_MODE,
382 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
383
384
385
386 /*
387 * We must now clean the cache again....
388 * Cleaning may be done by reading new data to displace any
389 * dirty data in the cache. This will have happened in setttb()
390 * but since we are boot strapping the addresses used for the read
391 * may have just been remapped and thus the cache could be out
392 * of sync. A re-clean after the switch will cure this.
393 * After booting there are no gross reloations of the kernel thus
394 * this problem will not occur after initarm().
395 */
396 cpu_idcache_wbinv_all();
397 /*
398 * Fetch the SDRAM start/size from the i80321 SDRAM configration
399 * registers.
400 */
401 i80321_calibrate_delay();
402 i80321_sdram_bounds(&obio_bs_tag, IQ80321_80321_VBASE + VERDE_MCU_BASE,
403 &memstart, &memsize);
404 physmem = memsize / PAGE_SIZE;
405 cninit();
406
407 /* Set stack for exception handlers */
408
409 data_abort_handler_address = (u_int)data_abort_handler;
410 prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
411 undefined_handler_address = (u_int)undefinedinstruction_bounce;
412 undefined_init();
413
414 proc_linkup(&proc0, &ksegrp0, &thread0);
415 thread0.td_kstack = kernelstack.pv_va;
416 thread0.td_pcb = (struct pcb *)
417 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
418 thread0.td_pcb->pcb_flags = 0;
419 thread0.td_frame = &proc0_tf;
420 pcpup->pc_curpcb = thread0.td_pcb;
421
422 /* Enable MMU, I-cache, D-cache, write buffer. */
423
424 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
425
426
427
428 pmap_curmaxkvaddr = afterkern + PAGE_SIZE;
429 pmap_bootstrap(pmap_curmaxkvaddr,
430 0xd0000000, &kernel_l1pt);
431 msgbufp = (void*)msgbufpv.pv_va;
432 msgbufinit(msgbufp, MSGBUF_SIZE);
433 mutex_init();
434
435 i = 0;
436 #ifdef ARM_USE_SMALL_ALLOC
437 phys_avail[i++] = 0xa0000000;
438 phys_avail[i++] = 0xa0001000; /*
439 *XXX: Gross hack to get our
440 * pages in the vm_page_array
441 . */
442 #endif
443 phys_avail[i++] = round_page(virtual_avail - KERNBASE + SDRAM_START);
444 phys_avail[i++] = trunc_page(0xa0000000 + memsize - 1);
445 phys_avail[i++] = 0;
446 phys_avail[i] = 0;
447
448 /* Do basic tuning, hz etc */
449 init_param1();
450 init_param2(physmem);
451 avail_end = 0xa0000000 + memsize - 1;
452 kdb_init();
453 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP -
454 sizeof(struct pcb)));
455 }
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