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/8.0/sys/arm/xscale/i8134x/crb_machdep.c 194784 2009-06-23 22:42:39Z jeff $");
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_object.h>
81 #include <vm/vm_page.h>
82 #include <vm/vm_pager.h>
83 #include <vm/vm_map.h>
84 #include <vm/vnode_pager.h>
85 #include <machine/pmap.h>
86 #include <machine/vmparam.h>
87 #include <machine/pcb.h>
88 #include <machine/undefined.h>
89 #include <machine/machdep.h>
90 #include <machine/metadata.h>
91 #include <machine/armreg.h>
92 #include <machine/bus.h>
93 #include <sys/reboot.h>
94
95
96 #include <arm/xscale/i80321/i80321var.h> /* For i80321_calibrate_delay() */
97
98 #include <arm/xscale/i8134x/i81342reg.h>
99 #include <arm/xscale/i8134x/i81342var.h>
100 #include <arm/xscale/i8134x/obiovar.h>
101
102
103 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */
104 #define KERNEL_PT_IOPXS 1
105 #define KERNEL_PT_BEFOREKERN 2
106 #define KERNEL_PT_AFKERNEL 3 /* L2 table for mapping after kernel */
107 #define KERNEL_PT_AFKERNEL_NUM 9
108
109 /* this should be evenly divisable by PAGE_SIZE / L2_TABLE_SIZE_REAL (or 4) */
110 #define NUM_KERNEL_PTS (KERNEL_PT_AFKERNEL + KERNEL_PT_AFKERNEL_NUM)
111
112 /* Define various stack sizes in pages */
113 #define IRQ_STACK_SIZE 1
114 #define ABT_STACK_SIZE 1
115 #define UND_STACK_SIZE 1
116
117 extern u_int data_abort_handler_address;
118 extern u_int prefetch_abort_handler_address;
119 extern u_int undefined_handler_address;
120
121 struct pv_addr kernel_pt_table[NUM_KERNEL_PTS];
122 extern int *end;
123
124 struct pcpu __pcpu;
125 struct pcpu *pcpup = &__pcpu;
126
127 /* Physical and virtual addresses for some global pages */
128
129 vm_paddr_t phys_avail[10];
130 vm_paddr_t dump_avail[4];
131 vm_offset_t physical_pages;
132
133 struct pv_addr systempage;
134 struct pv_addr msgbufpv;
135 struct pv_addr irqstack;
136 struct pv_addr undstack;
137 struct pv_addr abtstack;
138 struct pv_addr kernelstack;
139
140 static struct trapframe proc0_tf;
141
142 /* Static device mappings. */
143 static const struct pmap_devmap iq81342_devmap[] = {
144 {
145 IOP34X_VADDR,
146 IOP34X_HWADDR,
147 IOP34X_SIZE,
148 VM_PROT_READ|VM_PROT_WRITE,
149 PTE_NOCACHE,
150 },
151 {
152 /*
153 * Cheat and map a whole section, this will bring
154 * both PCI-X and PCI-E outbound I/O
155 */
156 IOP34X_PCIX_OIOBAR_VADDR &~ (0x100000 - 1),
157 IOP34X_PCIX_OIOBAR &~ (0x100000 - 1),
158 0x100000,
159 VM_PROT_READ|VM_PROT_WRITE,
160 PTE_NOCACHE,
161 },
162 {
163 IOP34X_PCE1_VADDR,
164 IOP34X_PCE1,
165 IOP34X_PCE1_SIZE,
166 VM_PROT_READ|VM_PROT_WRITE,
167 PTE_NOCACHE,
168 },
169 {
170 0,
171 0,
172 0,
173 0,
174 0,
175 }
176 };
177
178 #define SDRAM_START 0x00000000
179
180 extern vm_offset_t xscale_cache_clean_addr;
181
182 void *
183 initarm(void *arg, void *arg2)
184 {
185 struct pv_addr kernel_l1pt;
186 struct pv_addr dpcpu;
187 int loop, i;
188 u_int l1pagetable;
189 vm_offset_t freemempos;
190 vm_offset_t freemem_pt;
191 vm_offset_t afterkern;
192 vm_offset_t freemem_after;
193 vm_offset_t lastaddr;
194 uint32_t memsize, memstart;
195
196 set_cpufuncs();
197 lastaddr = fake_preload_metadata();
198 pcpu_init(pcpup, 0, sizeof(struct pcpu));
199 PCPU_SET(curthread, &thread0);
200
201 freemempos = 0x00200000;
202 /* Define a macro to simplify memory allocation */
203 #define valloc_pages(var, np) \
204 alloc_pages((var).pv_pa, (np)); \
205 (var).pv_va = (var).pv_pa + 0xc0000000;
206
207 #define alloc_pages(var, np) \
208 freemempos -= (np * PAGE_SIZE); \
209 (var) = freemempos; \
210 memset((char *)(var), 0, ((np) * PAGE_SIZE));
211
212 while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0)
213 freemempos -= PAGE_SIZE;
214 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
215 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
216 if (!(loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) {
217 valloc_pages(kernel_pt_table[loop],
218 L2_TABLE_SIZE / PAGE_SIZE);
219 } else {
220 kernel_pt_table[loop].pv_pa = freemempos +
221 (loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL)) *
222 L2_TABLE_SIZE_REAL;
223 kernel_pt_table[loop].pv_va =
224 kernel_pt_table[loop].pv_pa + 0xc0000000;
225 }
226 }
227 freemem_pt = freemempos;
228 freemempos = 0x00100000;
229 /*
230 * Allocate a page for the system page mapped to V0x00000000
231 * This page will just contain the system vectors and can be
232 * shared by all processes.
233 */
234 valloc_pages(systempage, 1);
235
236 /* Allocate dynamic per-cpu area. */
237 valloc_pages(dpcpu, DPCPU_SIZE / PAGE_SIZE);
238 dpcpu_init((void *)dpcpu.pv_va, 0);
239
240 /* Allocate stacks for all modes */
241 valloc_pages(irqstack, IRQ_STACK_SIZE);
242 valloc_pages(abtstack, ABT_STACK_SIZE);
243 valloc_pages(undstack, UND_STACK_SIZE);
244 valloc_pages(kernelstack, KSTACK_PAGES);
245 valloc_pages(msgbufpv, round_page(MSGBUF_SIZE) / PAGE_SIZE);
246 #ifdef ARM_USE_SMALL_ALLOC
247 freemempos -= PAGE_SIZE;
248 freemem_pt = trunc_page(freemem_pt);
249 freemem_after = freemempos - ((freemem_pt - 0x00100000) /
250 PAGE_SIZE) * sizeof(struct arm_small_page);
251 arm_add_smallalloc_pages((void *)(freemem_after + 0xc0000000)
252 , (void *)0xc0100000, freemem_pt - 0x00100000, 1);
253 freemem_after -= ((freemem_after - 0x00001000) / PAGE_SIZE) *
254 sizeof(struct arm_small_page);
255 #if 0
256 arm_add_smallalloc_pages((void *)(freemem_after + 0xc0000000)
257 , (void *)0xc0001000, trunc_page(freemem_after) - 0x00001000, 0);
258 #endif
259 freemempos = trunc_page(freemem_after);
260 freemempos -= PAGE_SIZE;
261 #endif
262 /*
263 * Now we start construction of the L1 page table
264 * We start by mapping the L2 page tables into the L1.
265 * This means that we can replace L1 mappings later on if necessary
266 */
267 l1pagetable = kernel_l1pt.pv_va;
268
269 /* Map the L2 pages tables in the L1 page table */
270 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00100000 - 1),
271 &kernel_pt_table[KERNEL_PT_SYS]);
272 pmap_map_chunk(l1pagetable, KERNBASE, SDRAM_START, 0x100000,
273 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
274
275 pmap_map_chunk(l1pagetable, KERNBASE + 0x100000, SDRAM_START + 0x100000,
276 0x100000, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
277
278 pmap_map_chunk(l1pagetable, KERNBASE + 0x200000, SDRAM_START + 0x200000,
279 (((uint32_t)(lastaddr) - KERNBASE - 0x200000) + L1_S_SIZE) & ~(L1_S_SIZE - 1),
280 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
281 freemem_after = ((int)lastaddr + PAGE_SIZE) & ~(PAGE_SIZE - 1);
282 afterkern = round_page(((vm_offset_t)lastaddr + L1_S_SIZE) & ~(L1_S_SIZE
283 - 1));
284 for (i = 0; i < KERNEL_PT_AFKERNEL_NUM; i++) {
285 pmap_link_l2pt(l1pagetable, afterkern + i * 0x00100000,
286 &kernel_pt_table[KERNEL_PT_AFKERNEL + i]);
287 }
288
289
290 #ifdef ARM_USE_SMALL_ALLOC
291 if ((freemem_after + 2 * PAGE_SIZE) <= afterkern) {
292 arm_add_smallalloc_pages((void *)(freemem_after),
293 (void*)(freemem_after + PAGE_SIZE),
294 afterkern - (freemem_after + PAGE_SIZE), 0);
295
296 }
297 #endif
298
299 /* Map the vector page. */
300 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
301 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
302 pmap_devmap_bootstrap(l1pagetable, iq81342_devmap);
303 /*
304 * Give the XScale global cache clean code an appropriately
305 * sized chunk of unmapped VA space starting at 0xff000000
306 * (our device mappings end before this address).
307 */
308 xscale_cache_clean_addr = 0xff000000U;
309
310 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
311 setttb(kernel_l1pt.pv_pa);
312 cpu_tlb_flushID();
313 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
314 /*
315 * Pages were allocated during the secondary bootstrap for the
316 * stacks for different CPU modes.
317 * We must now set the r13 registers in the different CPU modes to
318 * point to these stacks.
319 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
320 * of the stack memory.
321 */
322
323
324 set_stackptr(PSR_IRQ32_MODE,
325 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
326 set_stackptr(PSR_ABT32_MODE,
327 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
328 set_stackptr(PSR_UND32_MODE,
329 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
330
331
332
333 /*
334 * We must now clean the cache again....
335 * Cleaning may be done by reading new data to displace any
336 * dirty data in the cache. This will have happened in setttb()
337 * but since we are boot strapping the addresses used for the read
338 * may have just been remapped and thus the cache could be out
339 * of sync. A re-clean after the switch will cure this.
340 * After booting there are no gross relocations of the kernel thus
341 * this problem will not occur after initarm().
342 */
343 cpu_idcache_wbinv_all();
344 i80321_calibrate_delay();
345 i81342_sdram_bounds(&obio_bs_tag, IOP34X_VADDR, &memstart, &memsize);
346 physmem = memsize / PAGE_SIZE;
347 cninit();
348 /* Set stack for exception handlers */
349
350 data_abort_handler_address = (u_int)data_abort_handler;
351 prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
352 undefined_handler_address = (u_int)undefinedinstruction_bounce;
353 undefined_init();
354
355 proc_linkup0(&proc0, &thread0);
356 thread0.td_kstack = kernelstack.pv_va;
357 thread0.td_pcb = (struct pcb *)
358 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
359 thread0.td_pcb->pcb_flags = 0;
360 thread0.td_frame = &proc0_tf;
361 pcpup->pc_curpcb = thread0.td_pcb;
362
363 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
364
365 pmap_curmaxkvaddr = afterkern + PAGE_SIZE;
366 /*
367 * ARM_USE_SMALL_ALLOC uses dump_avail, so it must be filled before
368 * calling pmap_bootstrap.
369 */
370 dump_avail[0] = 0x00000000;
371 dump_avail[1] = 0x00000000 + memsize;
372 dump_avail[2] = 0;
373 dump_avail[3] = 0;
374
375 pmap_bootstrap(pmap_curmaxkvaddr,
376 0xd0000000, &kernel_l1pt);
377 msgbufp = (void*)msgbufpv.pv_va;
378 msgbufinit(msgbufp, MSGBUF_SIZE);
379 mutex_init();
380
381 i = 0;
382 #ifdef ARM_USE_SMALL_ALLOC
383 phys_avail[i++] = 0x00000000;
384 phys_avail[i++] = 0x00001000; /*
385 *XXX: Gross hack to get our
386 * pages in the vm_page_array
387 . */
388 #endif
389 phys_avail[i++] = round_page(virtual_avail - KERNBASE + SDRAM_START);
390 phys_avail[i++] = trunc_page(0x00000000 + memsize - 1);
391 phys_avail[i++] = 0;
392 phys_avail[i] = 0;
393
394 /* Do basic tuning, hz etc */
395 init_param1();
396 init_param2(physmem);
397 kdb_init();
398 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP -
399 sizeof(struct pcb)));
400 }
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