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("$FreeBSD$");
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 int loop, i;
187 u_int l1pagetable;
188 vm_offset_t freemempos;
189 vm_offset_t freemem_pt;
190 vm_offset_t afterkern;
191 vm_offset_t freemem_after;
192 vm_offset_t lastaddr;
193 uint32_t memsize, memstart;
194
195 set_cpufuncs();
196 lastaddr = fake_preload_metadata();
197 pcpu_init(pcpup, 0, sizeof(struct pcpu));
198 PCPU_SET(curthread, &thread0);
199
200 freemempos = 0x00200000;
201 /* Define a macro to simplify memory allocation */
202 #define valloc_pages(var, np) \
203 alloc_pages((var).pv_pa, (np)); \
204 (var).pv_va = (var).pv_pa + 0xc0000000;
205
206 #define alloc_pages(var, np) \
207 freemempos -= (np * PAGE_SIZE); \
208 (var) = freemempos; \
209 memset((char *)(var), 0, ((np) * PAGE_SIZE));
210
211 while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0)
212 freemempos -= PAGE_SIZE;
213 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
214 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
215 if (!(loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) {
216 valloc_pages(kernel_pt_table[loop],
217 L2_TABLE_SIZE / PAGE_SIZE);
218 } else {
219 kernel_pt_table[loop].pv_pa = freemempos +
220 (loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL)) *
221 L2_TABLE_SIZE_REAL;
222 kernel_pt_table[loop].pv_va =
223 kernel_pt_table[loop].pv_pa + 0xc0000000;
224 }
225 }
226 freemem_pt = freemempos;
227 freemempos = 0x00100000;
228 /*
229 * Allocate a page for the system page mapped to V0x00000000
230 * This page will just contain the system vectors and can be
231 * shared by all processes.
232 */
233 valloc_pages(systempage, 1);
234
235 /* Allocate stacks for all modes */
236 valloc_pages(irqstack, IRQ_STACK_SIZE);
237 valloc_pages(abtstack, ABT_STACK_SIZE);
238 valloc_pages(undstack, UND_STACK_SIZE);
239 valloc_pages(kernelstack, KSTACK_PAGES);
240 valloc_pages(msgbufpv, round_page(MSGBUF_SIZE) / PAGE_SIZE);
241 #ifdef ARM_USE_SMALL_ALLOC
242 freemempos -= PAGE_SIZE;
243 freemem_pt = trunc_page(freemem_pt);
244 freemem_after = freemempos - ((freemem_pt - 0x00100000) /
245 PAGE_SIZE) * sizeof(struct arm_small_page);
246 arm_add_smallalloc_pages((void *)(freemem_after + 0xc0000000)
247 , (void *)0xc0100000, freemem_pt - 0x00100000, 1);
248 freemem_after -= ((freemem_after - 0x00001000) / PAGE_SIZE) *
249 sizeof(struct arm_small_page);
250 #if 0
251 arm_add_smallalloc_pages((void *)(freemem_after + 0xc0000000)
252 , (void *)0xc0001000, trunc_page(freemem_after) - 0x00001000, 0);
253 #endif
254 freemempos = trunc_page(freemem_after);
255 freemempos -= PAGE_SIZE;
256 #endif
257 /*
258 * Now we start construction of the L1 page table
259 * We start by mapping the L2 page tables into the L1.
260 * This means that we can replace L1 mappings later on if necessary
261 */
262 l1pagetable = kernel_l1pt.pv_va;
263
264 /* Map the L2 pages tables in the L1 page table */
265 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00100000 - 1),
266 &kernel_pt_table[KERNEL_PT_SYS]);
267 pmap_map_chunk(l1pagetable, KERNBASE, SDRAM_START, 0x100000,
268 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
269
270 pmap_map_chunk(l1pagetable, KERNBASE + 0x100000, SDRAM_START + 0x100000,
271 0x100000, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
272
273 pmap_map_chunk(l1pagetable, KERNBASE + 0x200000, SDRAM_START + 0x200000,
274 (((uint32_t)(lastaddr) - KERNBASE - 0x200000) + L1_S_SIZE) & ~(L1_S_SIZE - 1),
275 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
276 freemem_after = ((int)lastaddr + PAGE_SIZE) & ~(PAGE_SIZE - 1);
277 afterkern = round_page(((vm_offset_t)lastaddr + L1_S_SIZE) & ~(L1_S_SIZE
278 - 1));
279 for (i = 0; i < KERNEL_PT_AFKERNEL_NUM; i++) {
280 pmap_link_l2pt(l1pagetable, afterkern + i * 0x00100000,
281 &kernel_pt_table[KERNEL_PT_AFKERNEL + i]);
282 }
283
284
285 #ifdef ARM_USE_SMALL_ALLOC
286 if ((freemem_after + 2 * PAGE_SIZE) <= afterkern) {
287 arm_add_smallalloc_pages((void *)(freemem_after),
288 (void*)(freemem_after + PAGE_SIZE),
289 afterkern - (freemem_after + PAGE_SIZE), 0);
290
291 }
292 #endif
293
294 /* Map the vector page. */
295 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
296 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
297 pmap_devmap_bootstrap(l1pagetable, iq81342_devmap);
298 /*
299 * Give the XScale global cache clean code an appropriately
300 * sized chunk of unmapped VA space starting at 0xff000000
301 * (our device mappings end before this address).
302 */
303 xscale_cache_clean_addr = 0xff000000U;
304
305 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
306 setttb(kernel_l1pt.pv_pa);
307 cpu_tlb_flushID();
308 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
309 /*
310 * Pages were allocated during the secondary bootstrap for the
311 * stacks for different CPU modes.
312 * We must now set the r13 registers in the different CPU modes to
313 * point to these stacks.
314 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
315 * of the stack memory.
316 */
317
318
319 set_stackptr(PSR_IRQ32_MODE,
320 irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE);
321 set_stackptr(PSR_ABT32_MODE,
322 abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE);
323 set_stackptr(PSR_UND32_MODE,
324 undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE);
325
326
327
328 /*
329 * We must now clean the cache again....
330 * Cleaning may be done by reading new data to displace any
331 * dirty data in the cache. This will have happened in setttb()
332 * but since we are boot strapping the addresses used for the read
333 * may have just been remapped and thus the cache could be out
334 * of sync. A re-clean after the switch will cure this.
335 * After booting there are no gross reloations of the kernel thus
336 * this problem will not occur after initarm().
337 */
338 cpu_idcache_wbinv_all();
339 i80321_calibrate_delay();
340 i81342_sdram_bounds(&obio_bs_tag, IOP34X_VADDR, &memstart, &memsize);
341 physmem = memsize / PAGE_SIZE;
342 cninit();
343 /* Set stack for exception handlers */
344
345 data_abort_handler_address = (u_int)data_abort_handler;
346 prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
347 undefined_handler_address = (u_int)undefinedinstruction_bounce;
348 undefined_init();
349
350 #ifdef KSE
351 proc_linkup(&proc0, &ksegrp0, &thread0);
352 #else
353 proc_linkup0(&proc0, &thread0);
354 #endif
355 thread0.td_kstack = kernelstack.pv_va;
356 thread0.td_pcb = (struct pcb *)
357 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
358 thread0.td_pcb->pcb_flags = 0;
359 thread0.td_frame = &proc0_tf;
360 pcpup->pc_curpcb = thread0.td_pcb;
361
362 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
363
364 pmap_curmaxkvaddr = afterkern + PAGE_SIZE;
365 /*
366 * ARM_USE_SMALL_ALLOC uses dump_avail, so it must be filled before
367 * calling pmap_bootstrap.
368 */
369 dump_avail[0] = 0x00000000;
370 dump_avail[1] = 0x00000000 + memsize;
371 dump_avail[2] = 0;
372 dump_avail[3] = 0;
373
374 pmap_bootstrap(pmap_curmaxkvaddr,
375 0xd0000000, &kernel_l1pt);
376 msgbufp = (void*)msgbufpv.pv_va;
377 msgbufinit(msgbufp, MSGBUF_SIZE);
378 mutex_init();
379
380 i = 0;
381 #ifdef ARM_USE_SMALL_ALLOC
382 phys_avail[i++] = 0x00000000;
383 phys_avail[i++] = 0x00001000; /*
384 *XXX: Gross hack to get our
385 * pages in the vm_page_array
386 . */
387 #endif
388 phys_avail[i++] = round_page(virtual_avail - KERNBASE + SDRAM_START);
389 phys_avail[i++] = trunc_page(0x00000000 + memsize - 1);
390 phys_avail[i++] = 0;
391 phys_avail[i] = 0;
392
393 /* Do basic tuning, hz etc */
394 init_param1();
395 init_param2(physmem);
396 kdb_init();
397 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP -
398 sizeof(struct pcb)));
399 }
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