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
49 #include <sys/cdefs.h>
50 __FBSDID("$FreeBSD$");
51
52 #include "opt_md.h"
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 <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 #define MDROOT_ADDR 0xd0400000
97
98 #define KERNEL_PT_VMEM 0 /* Page table for mapping video memory */
99 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */
100 #define KERNEL_PT_IO 3 /* Page table for mapping IO */
101 #define KERNEL_PT_IRQ 2 /* Page table for mapping irq handler */
102 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */
103 #define KERNEL_PT_L1 4 /* Page table for mapping l1pt */
104 #define KERNEL_PT_VMDATA 5 /* Page tables for mapping kernel VM */
105 #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */
106 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
107
108 /* Define various stack sizes in pages */
109 #define IRQ_STACK_SIZE 1
110 #define ABT_STACK_SIZE 1
111 #ifdef IPKDB
112 #define UND_STACK_SIZE 2
113 #else
114 #define UND_STACK_SIZE 1
115 #endif
116 #define KERNEL_VM_BASE (KERNBASE + 0x00c00000)
117 #define KERNEL_VM_SIZE 0x05000000
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 int got_mmu = 0;
128
129 extern vm_offset_t sa1_cache_clean_addr;
130
131 extern int *end;
132
133 struct pcpu __pcpu;
134 struct pcpu *pcpup = &__pcpu;
135
136 #ifndef MD_ROOT_SIZE
137 #define MD_ROOT_SIZE 65535
138 #endif
139 /* Physical and virtual addresses for some global pages */
140
141 vm_paddr_t phys_avail[10];
142 vm_paddr_t physical_start;
143 vm_paddr_t physical_end;
144 vm_paddr_t physical_freestart;
145 vm_offset_t physical_pages;
146 vm_offset_t clean_sva, clean_eva;
147
148 struct pv_addr systempage;
149 struct pv_addr irqstack;
150 struct pv_addr undstack;
151 struct pv_addr abtstack;
152 struct pv_addr kernelstack;
153 void enable_mmu(vm_offset_t);
154 static struct trapframe proc0_tf;
155
156 struct arm32_dma_range *
157 bus_dma_get_range(void)
158 {
159
160 return (NULL);
161 }
162
163 int
164 bus_dma_get_range_nb(void)
165 {
166 return (0);
167 }
168
169 void
170 cpu_reset()
171 {
172 cpu_halt();
173 while (1);
174 }
175
176 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2)
177
178 void *
179 initarm(void *arg, void *arg2)
180 {
181 struct pcpu *pc;
182 struct pv_addr kernel_l1pt;
183 struct pv_addr md_addr;
184 struct pv_addr md_bla;
185 int loop;
186 u_int kerneldatasize, symbolsize;
187 u_int l1pagetable;
188 vm_offset_t freemempos;
189 vm_offset_t lastalloced;
190 vm_size_t pt_size;
191 int i = 0;
192 uint32_t fake_preload[35];
193
194 boothowto = RB_VERBOSE | RB_SINGLE;
195 cninit();
196 set_cpufuncs();
197 fake_preload[i++] = MODINFO_NAME;
198 fake_preload[i++] = strlen("elf kernel") + 1;
199 strcpy((char*)&fake_preload[i++], "elf kernel");
200 i += 2;
201 fake_preload[i++] = MODINFO_TYPE;
202 fake_preload[i++] = strlen("elf kernel") + 1;
203 strcpy((char*)&fake_preload[i++], "elf kernel");
204 i += 2;
205 fake_preload[i++] = MODINFO_ADDR;
206 fake_preload[i++] = sizeof(vm_offset_t);
207 fake_preload[i++] = KERNBASE;
208 fake_preload[i++] = MODINFO_SIZE;
209 fake_preload[i++] = sizeof(uint32_t);
210 fake_preload[i++] = (uint32_t)&end - KERNBASE;
211 fake_preload[i++] = MODINFO_NAME;
212 fake_preload[i++] = strlen("md root") + 1;
213 strcpy((char*)&fake_preload[i++], "md root");
214 i += 1;
215 fake_preload[i++] = MODINFO_TYPE;
216 fake_preload[i++] = strlen("md_image") + 1;
217 strcpy((char*)&fake_preload[i++], "md_image");
218 i += 2;
219 fake_preload[i++] = MODINFO_ADDR;
220 fake_preload[i++] = sizeof(uint32_t);
221 fake_preload[i++] = MDROOT_ADDR;
222 fake_preload[i++] = MODINFO_SIZE;
223 fake_preload[i++] = sizeof(uint32_t);
224 fake_preload[i++] = MD_ROOT_SIZE * 1024;
225 fake_preload[i++] = 0;
226 fake_preload[i] = 0;
227 preload_metadata = (void *)fake_preload;
228
229 physmem =( 16 * 1024 * 1024) / PAGE_SIZE;
230 pc = &__pcpu;
231 pcpu_init(pc, 0, sizeof(struct pcpu));
232 PCPU_SET(curthread, &thread0);
233
234 physical_start = (vm_offset_t) KERNBASE;
235 physical_end = (vm_offset_t) &end;
236 physical_freestart = (((vm_offset_t)physical_end) + PAGE_MASK) & ~PAGE_MASK;
237 md_addr.pv_va = md_addr.pv_pa = MDROOT_ADDR;
238 #define KERNEL_TEXT_BASE (KERNBASE + 0x00040000)
239 kerneldatasize = (u_int32_t)&end - (u_int32_t)KERNEL_TEXT_BASE;
240 symbolsize = 0;
241 freemempos = (vm_offset_t)round_page(physical_freestart);
242 memset((void *)freemempos, 0, 256*1024);
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;
247
248 #define alloc_pages(var, np) \
249 (var) = freemempos; \
250 freemempos += ((np) * PAGE_SIZE);\
251 memset((char *)(var), 0, ((np) * PAGE_SIZE));
252
253 while ((freemempos & (L1_TABLE_SIZE - 1)) != 0)
254 freemempos += PAGE_SIZE;
255 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
256 valloc_pages(md_bla, L2_TABLE_SIZE / PAGE_SIZE);
257 alloc_pages(sa1_cache_clean_addr, CPU_SA110_CACHE_CLEAN_SIZE / PAGE_SIZE);
258 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
259 valloc_pages(kernel_pt_table[loop],
260 L2_TABLE_SIZE / PAGE_SIZE);
261 }
262
263 valloc_pages(systempage, 1);
264
265 /*
266 * Allocate a page for the system page mapped to V0x00000000
267 * This page will just contain the system vectors and can be
268 * shared by all processes.
269 */
270 pt_size = round_page(freemempos) - physical_freestart;
271
272 /* Allocate stacks for all modes */
273 valloc_pages(irqstack, IRQ_STACK_SIZE);
274 valloc_pages(abtstack, ABT_STACK_SIZE);
275 valloc_pages(undstack, UND_STACK_SIZE);
276 valloc_pages(kernelstack, KSTACK_PAGES);
277 lastalloced = kernelstack.pv_va;
278
279 /*
280 * Allocate memory for the l1 and l2 page tables. The scheme to avoid
281 * wasting memory by allocating the l1pt on the first 16k memory was
282 * taken from NetBSD rpc_machdep.c. NKPT should be greater than 12 for
283 * this to work (which is supposed to be the case).
284 */
285
286 /*
287 * Now we start construction of the L1 page table
288 * We start by mapping the L2 page tables into the L1.
289 * This means that we can replace L1 mappings later on if necessary
290 */
291 l1pagetable = kernel_l1pt.pv_pa;
292
293
294 /* Map the L2 pages tables in the L1 page table */
295 pmap_link_l2pt(l1pagetable, 0x00000000,
296 &kernel_pt_table[KERNEL_PT_SYS]);
297 pmap_link_l2pt(l1pagetable, KERNBASE,
298 &kernel_pt_table[KERNEL_PT_KERNEL]);
299 pmap_link_l2pt(l1pagetable, 0xd0000000,
300 &kernel_pt_table[KERNEL_PT_IO]);
301 pmap_link_l2pt(l1pagetable, lastalloced & ~((L1_S_SIZE * 4) - 1),
302 &kernel_pt_table[KERNEL_PT_L1]);
303 pmap_link_l2pt(l1pagetable, 0x90000000, &kernel_pt_table[KERNEL_PT_IRQ]);
304 pmap_link_l2pt(l1pagetable, MDROOT_ADDR,
305 &md_bla);
306 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop)
307 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00400000,
308 &kernel_pt_table[KERNEL_PT_VMDATA + loop]);
309 pmap_map_chunk(l1pagetable, KERNBASE, KERNBASE,
310 (uint32_t)&end - KERNBASE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
311 /* Map the stack pages */
312 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
313 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
314 pmap_map_chunk(l1pagetable, md_addr.pv_va, md_addr.pv_pa,
315 MD_ROOT_SIZE * 1024, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
316 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
317 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
318 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
319 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
320 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
321 KSTACK_PAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
322
323 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
324 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
325
326 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
327 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
328 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
329 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
330 }
331 pmap_map_chunk(l1pagetable, md_bla.pv_va, md_bla.pv_pa, L2_TABLE_SIZE,
332 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
333 /* Map the vector page. */
334 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa,
335 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
336 /* Map SACOM3. */
337 pmap_map_entry(l1pagetable, 0xd000d000, 0x80010000,
338 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE);
339 pmap_map_entry(l1pagetable, 0x90050000, 0x90050000,
340 VM_PROT_READ|VM_PROT_WRITE, PTE_NOCACHE);
341 pmap_map_chunk(l1pagetable, sa1_cache_clean_addr, 0xf0000000,
342 CPU_SA110_CACHE_CLEAN_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
343
344 data_abort_handler_address = (u_int)data_abort_handler;
345 prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
346 undefined_handler_address = (u_int)undefinedinstruction_bounce;
347 undefined_init();
348 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
349 setttb(kernel_l1pt.pv_pa);
350 cpu_tlb_flushID();
351 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
352
353 /*
354 * Pages were allocated during the secondary bootstrap for the
355 * stacks for different CPU modes.
356 * We must now set the r13 registers in the different CPU modes to
357 * point to these stacks.
358 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
359 * of the stack memory.
360 */
361 set_stackptr(PSR_IRQ32_MODE,
362 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
363 set_stackptr(PSR_ABT32_MODE,
364 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
365 set_stackptr(PSR_UND32_MODE,
366 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
367
368
369
370 /*
371 * We must now clean the cache again....
372 * Cleaning may be done by reading new data to displace any
373 * dirty data in the cache. This will have happened in setttb()
374 * but since we are boot strapping the addresses used for the read
375 * may have just been remapped and thus the cache could be out
376 * of sync. A re-clean after the switch will cure this.
377 * After booting there are no gross reloations of the kernel thus
378 * this problem will not occur after initarm().
379 */
380 /* cpu_idcache_wbinv_all();*/
381
382
383 bootverbose = 1;
384
385 /* Set stack for exception handlers */
386
387 proc_linkup(&proc0, &ksegrp0, &thread0);
388 thread0.td_kstack = kernelstack.pv_va;
389 thread0.td_pcb = (struct pcb *)
390 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
391 thread0.td_pcb->pcb_flags = 0;
392 thread0.td_frame = &proc0_tf;
393
394
395 /* Enable MMU, I-cache, D-cache, write buffer. */
396
397 cpufunc_control(0x337f, 0x107d);
398 got_mmu = 1;
399 arm_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL);
400
401 pmap_curmaxkvaddr = freemempos + KERNEL_PT_VMDATA_NUM * 0x400000;
402
403 pmap_bootstrap(freemempos,
404 0xd0000000, &kernel_l1pt);
405
406
407 mutex_init();
408
409
410 phys_avail[0] = round_page(virtual_avail);
411 phys_avail[1] = 0xc0000000 + 0x02000000 - 1;
412 phys_avail[2] = 0;
413 phys_avail[3] = 0;
414
415 /* Do basic tuning, hz etc */
416 init_param1();
417 init_param2(physmem);
418 kdb_init();
419 avail_end = 0xc0000000 + 0x02000000 - 1;
420 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP -
421 sizeof(struct pcb)));
422 }
Cache object: af34faf67aecc8de51ea38d1b099f95f
|