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/6.3/sys/arm/xscale/i80321/iq31244_machdep.c 172716 2007-10-16 21:24:44Z 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 dump_avail[4];
138 vm_paddr_t physical_start;
139 vm_paddr_t physical_end;
140 vm_offset_t physical_pages;
141 vm_offset_t clean_sva, clean_eva;
142
143 struct pv_addr systempage;
144 struct pv_addr msgbufpv;
145 struct pv_addr irqstack;
146 struct pv_addr undstack;
147 struct pv_addr abtstack;
148 struct pv_addr kernelstack;
149 struct pv_addr minidataclean;
150
151 void enable_mmu(vm_offset_t);
152 static struct trapframe proc0_tf;
153
154 #define IQ80321_OBIO_BASE 0xfe800000UL
155 #define IQ80321_OBIO_SIZE 0x00100000UL
156 /* Static device mappings. */
157 static const struct pmap_devmap iq80321_devmap[] = {
158 /*
159 * Map the on-board devices VA == PA so that we can access them
160 * with the MMU on or off.
161 */
162 {
163 IQ80321_OBIO_BASE,
164 IQ80321_OBIO_BASE,
165 IQ80321_OBIO_SIZE,
166 VM_PROT_READ|VM_PROT_WRITE,
167 PTE_NOCACHE,
168 },
169 {
170 IQ80321_IOW_VBASE,
171 VERDE_OUT_XLATE_IO_WIN0_BASE,
172 VERDE_OUT_XLATE_IO_WIN_SIZE,
173 VM_PROT_READ|VM_PROT_WRITE,
174 PTE_NOCACHE,
175 },
176
177 {
178 IQ80321_80321_VBASE,
179 VERDE_PMMR_BASE,
180 VERDE_PMMR_SIZE,
181 VM_PROT_READ|VM_PROT_WRITE,
182 PTE_NOCACHE,
183 },
184 {
185 0,
186 0,
187 0,
188 0,
189 0,
190 }
191 };
192
193 #define SDRAM_START 0xa0000000
194
195 extern vm_offset_t xscale_cache_clean_addr;
196
197 void *
198 initarm(void *arg, void *arg2)
199 {
200 struct pv_addr kernel_l1pt;
201 int loop;
202 u_int kerneldatasize, symbolsize;
203 u_int l1pagetable;
204 vm_offset_t freemempos;
205 vm_offset_t freemem_pt;
206 vm_offset_t afterkern;
207 vm_offset_t freemem_after;
208 int i = 0;
209 uint32_t fake_preload[35];
210 uint32_t memsize, memstart;
211
212 i = 0;
213
214 set_cpufuncs();
215 fake_preload[i++] = MODINFO_NAME;
216 fake_preload[i++] = strlen("elf kernel") + 1;
217 strcpy((char*)&fake_preload[i++], "elf kernel");
218 i += 2;
219 fake_preload[i++] = MODINFO_TYPE;
220 fake_preload[i++] = strlen("elf kernel") + 1;
221 strcpy((char*)&fake_preload[i++], "elf kernel");
222 i += 2;
223 fake_preload[i++] = MODINFO_ADDR;
224 fake_preload[i++] = sizeof(vm_offset_t);
225 fake_preload[i++] = KERNBASE + 0x00200000;
226 fake_preload[i++] = MODINFO_SIZE;
227 fake_preload[i++] = sizeof(uint32_t);
228 fake_preload[i++] = (uint32_t)&end - KERNBASE - 0x00200000;
229 fake_preload[i++] = 0;
230 fake_preload[i] = 0;
231 preload_metadata = (void *)fake_preload;
232
233
234 pcpu_init(pcpup, 0, sizeof(struct pcpu));
235 PCPU_SET(curthread, &thread0);
236
237 physical_start = (vm_offset_t) SDRAM_START;
238 physical_end = (vm_offset_t) &end + SDRAM_START - 0xc0000000;
239 #define KERNEL_TEXT_BASE (KERNBASE + 0x00200000)
240 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE;
241 symbolsize = 0;
242 freemempos = 0xa0200000;
243 /* Define a macro to simplify memory allocation */
244 #define valloc_pages(var, np) \
245 alloc_pages((var).pv_pa, (np)); \
246 (var).pv_va = (var).pv_pa + 0x20000000;
247
248 #define alloc_pages(var, np) \
249 freemempos -= (np * PAGE_SIZE); \
250 (var) = freemempos; \
251 memset((char *)(var), 0, ((np) * PAGE_SIZE));
252
253 while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0)
254 freemempos -= PAGE_SIZE;
255 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
256 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
257 if (!(loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) {
258 valloc_pages(kernel_pt_table[loop],
259 L2_TABLE_SIZE / PAGE_SIZE);
260 } else {
261 kernel_pt_table[loop].pv_pa = freemempos +
262 (loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL)) *
263 L2_TABLE_SIZE_REAL;
264 kernel_pt_table[loop].pv_va =
265 kernel_pt_table[loop].pv_pa + 0x20000000;
266 }
267 i++;
268 }
269 freemem_pt = freemempos;
270 freemempos = 0xa0100000;
271 /*
272 * Allocate a page for the system page mapped to V0x00000000
273 * This page will just contain the system vectors and can be
274 * shared by all processes.
275 */
276 valloc_pages(systempage, 1);
277
278 /* Allocate stacks for all modes */
279 valloc_pages(irqstack, IRQ_STACK_SIZE);
280 valloc_pages(abtstack, ABT_STACK_SIZE);
281 valloc_pages(undstack, UND_STACK_SIZE);
282 valloc_pages(kernelstack, KSTACK_PAGES);
283 alloc_pages(minidataclean.pv_pa, 1);
284 valloc_pages(msgbufpv, round_page(MSGBUF_SIZE) / PAGE_SIZE);
285 #ifdef ARM_USE_SMALL_ALLOC
286 freemempos -= PAGE_SIZE;
287 freemem_pt = trunc_page(freemem_pt);
288 freemem_after = freemempos - ((freemem_pt - 0xa0100000) /
289 PAGE_SIZE) * sizeof(struct arm_small_page);
290 arm_add_smallalloc_pages((void *)(freemem_after + 0x20000000)
291 , (void *)0xc0100000, freemem_pt - 0xa0100000, 1);
292 freemem_after -= ((freemem_after - 0xa0001000) / PAGE_SIZE) *
293 sizeof(struct arm_small_page);
294 arm_add_smallalloc_pages((void *)(freemem_after + 0x20000000)
295 , (void *)0xc0001000, trunc_page(freemem_after) - 0xa0001000, 0);
296 freemempos = trunc_page(freemem_after);
297 freemempos -= PAGE_SIZE;
298 #endif
299 /*
300 * Allocate memory for the l1 and l2 page tables. The scheme to avoid
301 * wasting memory by allocating the l1pt on the first 16k memory was
302 * taken from NetBSD rpc_machdep.c. NKPT should be greater than 12 for
303 * this to work (which is supposed to be the case).
304 */
305
306 /*
307 * Now we start construction of the L1 page table
308 * We start by mapping the L2 page tables into the L1.
309 * This means that we can replace L1 mappings later on if necessary
310 */
311 l1pagetable = kernel_l1pt.pv_va;
312
313 /* Map the L2 pages tables in the L1 page table */
314 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00100000 - 1),
315 &kernel_pt_table[KERNEL_PT_SYS]);
316 pmap_link_l2pt(l1pagetable, IQ80321_IOPXS_VBASE,
317 &kernel_pt_table[KERNEL_PT_IOPXS]);
318 pmap_link_l2pt(l1pagetable, KERNBASE,
319 &kernel_pt_table[KERNEL_PT_BEFOREKERN]);
320 pmap_map_chunk(l1pagetable, KERNBASE, SDRAM_START, 0x100000,
321 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
322 pmap_map_chunk(l1pagetable, KERNBASE + 0x100000, SDRAM_START + 0x100000,
323 0x100000, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
324 pmap_map_chunk(l1pagetable, KERNBASE + 0x200000, SDRAM_START + 0x200000,
325 (((uint32_t)(&end) - KERNBASE - 0x200000) + L1_S_SIZE) & ~(L1_S_SIZE - 1),
326 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
327 freemem_after = ((int)&end + PAGE_SIZE) & ~(PAGE_SIZE - 1);
328 afterkern = round_page(((vm_offset_t)&end + L1_S_SIZE) & ~(L1_S_SIZE
329 - 1));
330 for (i = 0; i < KERNEL_PT_AFKERNEL_NUM; i++) {
331 pmap_link_l2pt(l1pagetable, afterkern + i * 0x00100000,
332 &kernel_pt_table[KERNEL_PT_AFKERNEL + i]);
333 }
334 pmap_map_entry(l1pagetable, afterkern, minidataclean.pv_pa,
335 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
336
337
338 #ifdef ARM_USE_SMALL_ALLOC
339 if ((freemem_after + 2 * PAGE_SIZE) <= afterkern) {
340 arm_add_smallalloc_pages((void *)(freemem_after),
341 (void*)(freemem_after + PAGE_SIZE),
342 afterkern - (freemem_after + PAGE_SIZE), 0);
343
344 }
345 #endif
346
347 /* Map the Mini-Data cache clean area. */
348 xscale_setup_minidata(l1pagetable, afterkern,
349 minidataclean.pv_pa);
350
351 /* Map the vector page. */
352 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
353 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
354 pmap_devmap_bootstrap(l1pagetable, iq80321_devmap);
355 /*
356 * Give the XScale global cache clean code an appropriately
357 * sized chunk of unmapped VA space starting at 0xff000000
358 * (our device mappings end before this address).
359 */
360 xscale_cache_clean_addr = 0xff000000U;
361
362 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
363 setttb(kernel_l1pt.pv_pa);
364 cpu_tlb_flushID();
365 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
366 /*
367 * Pages were allocated during the secondary bootstrap for the
368 * stacks for different CPU modes.
369 * We must now set the r13 registers in the different CPU modes to
370 * point to these stacks.
371 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
372 * of the stack memory.
373 */
374
375
376 set_stackptr(PSR_IRQ32_MODE,
377 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
378 set_stackptr(PSR_ABT32_MODE,
379 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
380 set_stackptr(PSR_UND32_MODE,
381 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
382
383
384
385 /*
386 * We must now clean the cache again....
387 * Cleaning may be done by reading new data to displace any
388 * dirty data in the cache. This will have happened in setttb()
389 * but since we are boot strapping the addresses used for the read
390 * may have just been remapped and thus the cache could be out
391 * of sync. A re-clean after the switch will cure this.
392 * After booting there are no gross reloations of the kernel thus
393 * this problem will not occur after initarm().
394 */
395 cpu_idcache_wbinv_all();
396 /*
397 * Fetch the SDRAM start/size from the i80321 SDRAM configration
398 * registers.
399 */
400 i80321_calibrate_delay();
401 i80321_sdram_bounds(&obio_bs_tag, IQ80321_80321_VBASE + VERDE_MCU_BASE,
402 &memstart, &memsize);
403 physmem = memsize / PAGE_SIZE;
404 cninit();
405
406 /* Set stack for exception handlers */
407
408 data_abort_handler_address = (u_int)data_abort_handler;
409 prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
410 undefined_handler_address = (u_int)undefinedinstruction_bounce;
411 undefined_init();
412
413 proc_linkup(&proc0, &ksegrp0, &thread0);
414 thread0.td_kstack = kernelstack.pv_va;
415 thread0.td_pcb = (struct pcb *)
416 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
417 thread0.td_pcb->pcb_flags = 0;
418 thread0.td_frame = &proc0_tf;
419 pcpup->pc_curpcb = thread0.td_pcb;
420
421 /* Enable MMU, I-cache, D-cache, write buffer. */
422
423 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
424
425
426
427 pmap_curmaxkvaddr = afterkern + PAGE_SIZE;
428 /*
429 * ARM_USE_SMALL_ALLOC uses dump_avail, so it must be filled before
430 * calling pmap_bootstrap.
431 */
432 dump_avail[0] = 0xa0000000;
433 dump_avail[1] = 0xa0000000 + memsize;
434 dump_avail[2] = 0;
435 dump_avail[3] = 0;
436 pmap_bootstrap(pmap_curmaxkvaddr,
437 0xd0000000, &kernel_l1pt);
438 msgbufp = (void*)msgbufpv.pv_va;
439 msgbufinit(msgbufp, MSGBUF_SIZE);
440 mutex_init();
441
442 i = 0;
443 #ifdef ARM_USE_SMALL_ALLOC
444 phys_avail[i++] = 0xa0000000;
445 phys_avail[i++] = 0xa0001000; /*
446 *XXX: Gross hack to get our
447 * pages in the vm_page_array
448 . */
449 #endif
450 phys_avail[i++] = round_page(virtual_avail - KERNBASE + SDRAM_START);
451 phys_avail[i++] = trunc_page(0xa0000000 + memsize - 1);
452 phys_avail[i++] = 0;
453 phys_avail[i] = 0;
454
455 /* Do basic tuning, hz etc */
456 init_param1();
457 init_param2(physmem);
458 avail_end = 0xa0000000 + memsize - 1;
459 kdb_init();
460 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP -
461 sizeof(struct pcb)));
462 }
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