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 <sys/cdefs.h>
49 __FBSDID("$FreeBSD: releng/10.0/sys/arm/xscale/i8134x/crb_machdep.c 247564 2013-03-01 19:02:41Z alc $");
50
51 #define _ARM32_BUS_DMA_PRIVATE
52 #include <sys/param.h>
53 #include <sys/systm.h>
54 #include <sys/sysproto.h>
55 #include <sys/signalvar.h>
56 #include <sys/imgact.h>
57 #include <sys/kernel.h>
58 #include <sys/ktr.h>
59 #include <sys/linker.h>
60 #include <sys/lock.h>
61 #include <sys/malloc.h>
62 #include <sys/mutex.h>
63 #include <sys/pcpu.h>
64 #include <sys/proc.h>
65 #include <sys/ptrace.h>
66 #include <sys/cons.h>
67 #include <sys/bio.h>
68 #include <sys/bus.h>
69 #include <sys/buf.h>
70 #include <sys/exec.h>
71 #include <sys/kdb.h>
72 #include <sys/msgbuf.h>
73 #include <machine/reg.h>
74 #include <machine/cpu.h>
75
76 #include <vm/vm.h>
77 #include <vm/pmap.h>
78 #include <vm/vm_object.h>
79 #include <vm/vm_page.h>
80 #include <vm/vm_map.h>
81 #include <machine/vmparam.h>
82 #include <machine/pcb.h>
83 #include <machine/undefined.h>
84 #include <machine/machdep.h>
85 #include <machine/metadata.h>
86 #include <machine/armreg.h>
87 #include <machine/bus.h>
88 #include <sys/reboot.h>
89
90
91 #include <arm/xscale/i80321/i80321var.h> /* For i80321_calibrate_delay() */
92
93 #include <arm/xscale/i8134x/i81342reg.h>
94 #include <arm/xscale/i8134x/i81342var.h>
95 #include <arm/xscale/i8134x/obiovar.h>
96
97
98 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */
99 #define KERNEL_PT_IOPXS 1
100 #define KERNEL_PT_BEFOREKERN 2
101 #define KERNEL_PT_AFKERNEL 3 /* L2 table for mapping after kernel */
102 #define KERNEL_PT_AFKERNEL_NUM 9
103
104 /* this should be evenly divisable by PAGE_SIZE / L2_TABLE_SIZE_REAL (or 4) */
105 #define NUM_KERNEL_PTS (KERNEL_PT_AFKERNEL + KERNEL_PT_AFKERNEL_NUM)
106
107 extern u_int data_abort_handler_address;
108 extern u_int prefetch_abort_handler_address;
109 extern u_int undefined_handler_address;
110
111 struct pv_addr kernel_pt_table[NUM_KERNEL_PTS];
112
113 /* Physical and virtual addresses for some global pages */
114
115 vm_paddr_t phys_avail[10];
116 vm_paddr_t dump_avail[4];
117
118 struct pv_addr systempage;
119 struct pv_addr msgbufpv;
120 struct pv_addr irqstack;
121 struct pv_addr undstack;
122 struct pv_addr abtstack;
123 struct pv_addr kernelstack;
124
125 /* Static device mappings. */
126 static const struct pmap_devmap iq81342_devmap[] = {
127 {
128 IOP34X_VADDR,
129 IOP34X_HWADDR,
130 IOP34X_SIZE,
131 VM_PROT_READ|VM_PROT_WRITE,
132 PTE_NOCACHE,
133 },
134 {
135 /*
136 * Cheat and map a whole section, this will bring
137 * both PCI-X and PCI-E outbound I/O
138 */
139 IOP34X_PCIX_OIOBAR_VADDR &~ (0x100000 - 1),
140 IOP34X_PCIX_OIOBAR &~ (0x100000 - 1),
141 0x100000,
142 VM_PROT_READ|VM_PROT_WRITE,
143 PTE_NOCACHE,
144 },
145 {
146 IOP34X_PCE1_VADDR,
147 IOP34X_PCE1,
148 IOP34X_PCE1_SIZE,
149 VM_PROT_READ|VM_PROT_WRITE,
150 PTE_NOCACHE,
151 },
152 {
153 0,
154 0,
155 0,
156 0,
157 0,
158 }
159 };
160
161 #define SDRAM_START 0x00000000
162
163 extern vm_offset_t xscale_cache_clean_addr;
164
165 void *
166 initarm(struct arm_boot_params *abp)
167 {
168 struct pv_addr kernel_l1pt;
169 struct pv_addr dpcpu;
170 int loop, i;
171 u_int l1pagetable;
172 vm_offset_t freemempos;
173 vm_offset_t freemem_pt;
174 vm_offset_t afterkern;
175 vm_offset_t freemem_after;
176 vm_offset_t lastaddr;
177 uint32_t memsize, memstart;
178
179 lastaddr = parse_boot_param(abp);
180 set_cpufuncs();
181 pcpu_init(pcpup, 0, sizeof(struct pcpu));
182 PCPU_SET(curthread, &thread0);
183
184 /* Do basic tuning, hz etc */
185 init_param1();
186
187 freemempos = 0x00200000;
188 /* Define a macro to simplify memory allocation */
189 #define valloc_pages(var, np) \
190 alloc_pages((var).pv_pa, (np)); \
191 (var).pv_va = (var).pv_pa + 0xc0000000;
192
193 #define alloc_pages(var, np) \
194 freemempos -= (np * PAGE_SIZE); \
195 (var) = freemempos; \
196 memset((char *)(var), 0, ((np) * PAGE_SIZE));
197
198 while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0)
199 freemempos -= PAGE_SIZE;
200 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
201 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
202 if (!(loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) {
203 valloc_pages(kernel_pt_table[loop],
204 L2_TABLE_SIZE / PAGE_SIZE);
205 } else {
206 kernel_pt_table[loop].pv_pa = freemempos +
207 (loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL)) *
208 L2_TABLE_SIZE_REAL;
209 kernel_pt_table[loop].pv_va =
210 kernel_pt_table[loop].pv_pa + 0xc0000000;
211 }
212 }
213 freemem_pt = freemempos;
214 freemempos = 0x00100000;
215 /*
216 * Allocate a page for the system page mapped to V0x00000000
217 * This page will just contain the system vectors and can be
218 * shared by all processes.
219 */
220 valloc_pages(systempage, 1);
221
222 /* Allocate dynamic per-cpu area. */
223 valloc_pages(dpcpu, DPCPU_SIZE / PAGE_SIZE);
224 dpcpu_init((void *)dpcpu.pv_va, 0);
225
226 /* Allocate stacks for all modes */
227 valloc_pages(irqstack, IRQ_STACK_SIZE);
228 valloc_pages(abtstack, ABT_STACK_SIZE);
229 valloc_pages(undstack, UND_STACK_SIZE);
230 valloc_pages(kernelstack, KSTACK_PAGES);
231 valloc_pages(msgbufpv, round_page(msgbufsize) / PAGE_SIZE);
232 #ifdef ARM_USE_SMALL_ALLOC
233 freemempos -= PAGE_SIZE;
234 freemem_pt = trunc_page(freemem_pt);
235 freemem_after = freemempos - ((freemem_pt - 0x00100000) /
236 PAGE_SIZE) * sizeof(struct arm_small_page);
237 arm_add_smallalloc_pages((void *)(freemem_after + 0xc0000000)
238 , (void *)0xc0100000, freemem_pt - 0x00100000, 1);
239 freemem_after -= ((freemem_after - 0x00001000) / PAGE_SIZE) *
240 sizeof(struct arm_small_page);
241 #if 0
242 arm_add_smallalloc_pages((void *)(freemem_after + 0xc0000000)
243 , (void *)0xc0001000, trunc_page(freemem_after) - 0x00001000, 0);
244 #endif
245 freemempos = trunc_page(freemem_after);
246 freemempos -= PAGE_SIZE;
247 #endif
248 /*
249 * Now we start construction of the L1 page table
250 * We start by mapping the L2 page tables into the L1.
251 * This means that we can replace L1 mappings later on if necessary
252 */
253 l1pagetable = kernel_l1pt.pv_va;
254
255 /* Map the L2 pages tables in the L1 page table */
256 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00100000 - 1),
257 &kernel_pt_table[KERNEL_PT_SYS]);
258 pmap_map_chunk(l1pagetable, KERNBASE, SDRAM_START, 0x100000,
259 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
260
261 pmap_map_chunk(l1pagetable, KERNBASE + 0x100000, SDRAM_START + 0x100000,
262 0x100000, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
263
264 pmap_map_chunk(l1pagetable, KERNBASE + 0x200000, SDRAM_START + 0x200000,
265 (((uint32_t)(lastaddr) - KERNBASE - 0x200000) + L1_S_SIZE) & ~(L1_S_SIZE - 1),
266 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
267 freemem_after = ((int)lastaddr + PAGE_SIZE) & ~(PAGE_SIZE - 1);
268 afterkern = round_page(((vm_offset_t)lastaddr + L1_S_SIZE) & ~(L1_S_SIZE
269 - 1));
270 for (i = 0; i < KERNEL_PT_AFKERNEL_NUM; i++) {
271 pmap_link_l2pt(l1pagetable, afterkern + i * 0x00100000,
272 &kernel_pt_table[KERNEL_PT_AFKERNEL + i]);
273 }
274
275
276 #ifdef ARM_USE_SMALL_ALLOC
277 if ((freemem_after + 2 * PAGE_SIZE) <= afterkern) {
278 arm_add_smallalloc_pages((void *)(freemem_after),
279 (void*)(freemem_after + PAGE_SIZE),
280 afterkern - (freemem_after + PAGE_SIZE), 0);
281
282 }
283 #endif
284
285 /* Map the vector page. */
286 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
287 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
288 pmap_devmap_bootstrap(l1pagetable, iq81342_devmap);
289 /*
290 * Give the XScale global cache clean code an appropriately
291 * sized chunk of unmapped VA space starting at 0xff000000
292 * (our device mappings end before this address).
293 */
294 xscale_cache_clean_addr = 0xff000000U;
295
296 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
297 setttb(kernel_l1pt.pv_pa);
298 cpu_tlb_flushID();
299 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
300 /*
301 * Pages were allocated during the secondary bootstrap for the
302 * stacks for different CPU modes.
303 * We must now set the r13 registers in the different CPU modes to
304 * point to these stacks.
305 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
306 * of the stack memory.
307 */
308
309 set_stackptrs(0);
310
311 /*
312 * We must now clean the cache again....
313 * Cleaning may be done by reading new data to displace any
314 * dirty data in the cache. This will have happened in setttb()
315 * but since we are boot strapping the addresses used for the read
316 * may have just been remapped and thus the cache could be out
317 * of sync. A re-clean after the switch will cure this.
318 * After booting there are no gross relocations of the kernel thus
319 * this problem will not occur after initarm().
320 */
321 cpu_idcache_wbinv_all();
322 i80321_calibrate_delay();
323 i81342_sdram_bounds(&obio_bs_tag, IOP34X_VADDR, &memstart, &memsize);
324 physmem = memsize / PAGE_SIZE;
325 cninit();
326 /* Set stack for exception handlers */
327
328 data_abort_handler_address = (u_int)data_abort_handler;
329 prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
330 undefined_handler_address = (u_int)undefinedinstruction_bounce;
331 undefined_init();
332
333 init_proc0(kernelstack.pv_va);
334
335 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
336
337 pmap_curmaxkvaddr = afterkern + PAGE_SIZE;
338 /*
339 * ARM_USE_SMALL_ALLOC uses dump_avail, so it must be filled before
340 * calling pmap_bootstrap.
341 */
342 dump_avail[0] = 0x00000000;
343 dump_avail[1] = 0x00000000 + memsize;
344 dump_avail[2] = 0;
345 dump_avail[3] = 0;
346
347 vm_max_kernel_address = 0xd0000000;
348 pmap_bootstrap(pmap_curmaxkvaddr, &kernel_l1pt);
349 msgbufp = (void*)msgbufpv.pv_va;
350 msgbufinit(msgbufp, msgbufsize);
351 mutex_init();
352
353 i = 0;
354 #ifdef ARM_USE_SMALL_ALLOC
355 phys_avail[i++] = 0x00001000;
356 phys_avail[i++] = 0x00002000; /*
357 *XXX: Gross hack to get our
358 * pages in the vm_page_array
359 . */
360 #endif
361 phys_avail[i++] = round_page(virtual_avail - KERNBASE + SDRAM_START);
362 phys_avail[i++] = trunc_page(0x00000000 + memsize - 1);
363 phys_avail[i++] = 0;
364 phys_avail[i] = 0;
365
366 init_param2(physmem);
367 kdb_init();
368 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP -
369 sizeof(struct pcb)));
370 }
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