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 dependent 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("$FreeBSD$");
50
51 #include "opt_kstack_pages.h"
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 <sys/devmap.h>
76 #include <machine/reg.h>
77 #include <machine/cpu.h>
78
79 #include <vm/vm.h>
80 #include <vm/pmap.h>
81 #include <vm/vm_object.h>
82 #include <vm/vm_page.h>
83 #include <vm/vm_map.h>
84 #include <machine/vmparam.h>
85 #include <machine/pcb.h>
86 #include <machine/undefined.h>
87 #include <machine/machdep.h>
88 #include <machine/metadata.h>
89 #include <machine/armreg.h>
90 #include <machine/bus.h>
91 #include <machine/physmem.h>
92 #include <sys/reboot.h>
93
94
95 #include <arm/xscale/i8134x/i80321var.h> /* For i80321_calibrate_delay() */
96
97 #include <arm/xscale/i8134x/i81342reg.h>
98 #include <arm/xscale/i8134x/i81342var.h>
99 #include <arm/xscale/i8134x/obiovar.h>
100
101
102 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */
103 #define KERNEL_PT_IOPXS 1
104 #define KERNEL_PT_BEFOREKERN 2
105 #define KERNEL_PT_AFKERNEL 3 /* L2 table for mapping after kernel */
106 #define KERNEL_PT_AFKERNEL_NUM 9
107
108 /* this should be evenly divisable by PAGE_SIZE / L2_TABLE_SIZE_REAL (or 4) */
109 #define NUM_KERNEL_PTS (KERNEL_PT_AFKERNEL + KERNEL_PT_AFKERNEL_NUM)
110
111 struct pv_addr kernel_pt_table[NUM_KERNEL_PTS];
112
113 /* Physical and virtual addresses for some global pages */
114
115 struct pv_addr systempage;
116 struct pv_addr msgbufpv;
117 struct pv_addr irqstack;
118 struct pv_addr undstack;
119 struct pv_addr abtstack;
120 struct pv_addr kernelstack;
121
122 /* Static device mappings. */
123 static const struct devmap_entry iq81342_devmap[] = {
124 {
125 IOP34X_VADDR,
126 IOP34X_HWADDR,
127 IOP34X_SIZE,
128 },
129 {
130 /*
131 * Cheat and map a whole section, this will bring
132 * both PCI-X and PCI-E outbound I/O
133 */
134 rounddown2(IOP34X_PCIX_OIOBAR_VADDR, 0x100000),
135 rounddown2(IOP34X_PCIX_OIOBAR, 0x100000),
136 0x100000,
137 },
138 {
139 IOP34X_PCE1_VADDR,
140 IOP34X_PCE1,
141 IOP34X_PCE1_SIZE,
142 },
143 {
144 0,
145 0,
146 0,
147 }
148 };
149
150 #define SDRAM_START 0x00000000
151
152 extern vm_offset_t xscale_cache_clean_addr;
153
154 void *
155 initarm(struct arm_boot_params *abp)
156 {
157 struct pv_addr kernel_l1pt;
158 struct pv_addr dpcpu;
159 int loop, i;
160 u_int l1pagetable;
161 vm_offset_t freemempos;
162 vm_offset_t freemem_pt;
163 vm_offset_t afterkern;
164 vm_offset_t freemem_after;
165 vm_offset_t lastaddr;
166 uint32_t memsize, memstart;
167
168 lastaddr = parse_boot_param(abp);
169 arm_physmem_kernaddr = abp->abp_physaddr;
170 set_cpufuncs();
171 pcpu_init(pcpup, 0, sizeof(struct pcpu));
172 PCPU_SET(curthread, &thread0);
173
174 /* Do basic tuning, hz etc */
175 init_param1();
176
177 freemempos = 0x00200000;
178 /* Define a macro to simplify memory allocation */
179 #define valloc_pages(var, np) \
180 alloc_pages((var).pv_pa, (np)); \
181 (var).pv_va = (var).pv_pa + 0xc0000000;
182
183 #define alloc_pages(var, np) \
184 freemempos -= (np * PAGE_SIZE); \
185 (var) = freemempos; \
186 memset((char *)(var), 0, ((np) * PAGE_SIZE));
187
188 while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0)
189 freemempos -= PAGE_SIZE;
190 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
191 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
192 if (!(loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) {
193 valloc_pages(kernel_pt_table[loop],
194 L2_TABLE_SIZE / PAGE_SIZE);
195 } else {
196 kernel_pt_table[loop].pv_pa = freemempos +
197 (loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL)) *
198 L2_TABLE_SIZE_REAL;
199 kernel_pt_table[loop].pv_va =
200 kernel_pt_table[loop].pv_pa + 0xc0000000;
201 }
202 }
203 freemem_pt = freemempos;
204 freemempos = 0x00100000;
205 /*
206 * Allocate a page for the system page mapped to V0x00000000
207 * This page will just contain the system vectors and can be
208 * shared by all processes.
209 */
210 valloc_pages(systempage, 1);
211
212 /* Allocate dynamic per-cpu area. */
213 valloc_pages(dpcpu, DPCPU_SIZE / PAGE_SIZE);
214 dpcpu_init((void *)dpcpu.pv_va, 0);
215
216 /* Allocate stacks for all modes */
217 valloc_pages(irqstack, IRQ_STACK_SIZE);
218 valloc_pages(abtstack, ABT_STACK_SIZE);
219 valloc_pages(undstack, UND_STACK_SIZE);
220 valloc_pages(kernelstack, kstack_pages);
221 valloc_pages(msgbufpv, round_page(msgbufsize) / PAGE_SIZE);
222 /*
223 * Now we start construction of the L1 page table
224 * We start by mapping the L2 page tables into the L1.
225 * This means that we can replace L1 mappings later on if necessary
226 */
227 l1pagetable = kernel_l1pt.pv_va;
228
229 /* Map the L2 pages tables in the L1 page table */
230 pmap_link_l2pt(l1pagetable, rounddown2(ARM_VECTORS_HIGH, 0x00100000),
231 &kernel_pt_table[KERNEL_PT_SYS]);
232 pmap_map_chunk(l1pagetable, KERNBASE, SDRAM_START, 0x100000,
233 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
234
235 pmap_map_chunk(l1pagetable, KERNBASE + 0x100000, SDRAM_START + 0x100000,
236 0x100000, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
237
238 pmap_map_chunk(l1pagetable, KERNBASE + 0x200000, SDRAM_START + 0x200000,
239 rounddown2(((uint32_t)(lastaddr) - KERNBASE - 0x200000) + L1_S_SIZE, L1_S_SIZE),
240 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
241 freemem_after = rounddown2((int)lastaddr + PAGE_SIZE, PAGE_SIZE);
242 afterkern = round_page(rounddown2((vm_offset_t)lastaddr + L1_S_SIZE, L1_S_SIZE));
243 for (i = 0; i < KERNEL_PT_AFKERNEL_NUM; i++) {
244 pmap_link_l2pt(l1pagetable, afterkern + i * 0x00100000,
245 &kernel_pt_table[KERNEL_PT_AFKERNEL + i]);
246 }
247
248
249 /* Map the vector page. */
250 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
251 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
252 devmap_bootstrap(l1pagetable, iq81342_devmap);
253 /*
254 * Give the XScale global cache clean code an appropriately
255 * sized chunk of unmapped VA space starting at 0xff000000
256 * (our device mappings end before this address).
257 */
258 xscale_cache_clean_addr = 0xff000000U;
259
260 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
261 cpu_setttb(kernel_l1pt.pv_pa);
262 cpu_tlb_flushID();
263 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
264 /*
265 * Pages were allocated during the secondary bootstrap for the
266 * stacks for different CPU modes.
267 * We must now set the r13 registers in the different CPU modes to
268 * point to these stacks.
269 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
270 * of the stack memory.
271 */
272
273 set_stackptrs(0);
274
275 /*
276 * We must now clean the cache again....
277 * Cleaning may be done by reading new data to displace any
278 * dirty data in the cache. This will have happened in cpu_setttb()
279 * but since we are boot strapping the addresses used for the read
280 * may have just been remapped and thus the cache could be out
281 * of sync. A re-clean after the switch will cure this.
282 * After booting there are no gross relocations of the kernel thus
283 * this problem will not occur after initarm().
284 */
285 cpu_idcache_wbinv_all();
286 cpu_setup();
287
288 i80321_calibrate_delay();
289 i81342_sdram_bounds(arm_base_bs_tag, IOP34X_VADDR, &memstart, &memsize);
290 physmem = memsize / PAGE_SIZE;
291 cninit();
292 /* Set stack for exception handlers */
293
294 undefined_init();
295
296 init_proc0(kernelstack.pv_va);
297
298 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
299
300 pmap_curmaxkvaddr = afterkern + PAGE_SIZE;
301
302 vm_max_kernel_address = 0xe0000000;
303 pmap_bootstrap(pmap_curmaxkvaddr, &kernel_l1pt);
304 msgbufp = (void*)msgbufpv.pv_va;
305 msgbufinit(msgbufp, msgbufsize);
306 mutex_init();
307
308 /*
309 * Add the physical ram we have available.
310 *
311 * Exclude the kernel (and all the things we allocated which immediately
312 * follow the kernel) from the VM allocation pool but not from crash
313 * dumps. virtual_avail is a global variable which tracks the kva we've
314 * "allocated" while setting up pmaps.
315 *
316 * Prepare the list of physical memory available to the vm subsystem.
317 */
318 arm_physmem_hardware_region(SDRAM_START, memsize);
319 arm_physmem_exclude_region(freemem_pt, abp->abp_physaddr -
320 freemem_pt, EXFLAG_NOALLOC);
321 arm_physmem_exclude_region(freemempos, abp->abp_physaddr - 0x100000 -
322 freemempos, EXFLAG_NOALLOC);
323 arm_physmem_exclude_region(abp->abp_physaddr,
324 virtual_avail - KERNVIRTADDR, EXFLAG_NOALLOC);
325 arm_physmem_init_kernel_globals();
326
327 init_param2(physmem);
328 kdb_init();
329 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP -
330 sizeof(struct pcb)));
331 }
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