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("$FreeBSD$");
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 <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_map.h>
83 #include <machine/devmap.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/i80321/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 arm_devmap_entry iq81342_devmap[] = {
124 {
125 IOP34X_VADDR,
126 IOP34X_HWADDR,
127 IOP34X_SIZE,
128 VM_PROT_READ|VM_PROT_WRITE,
129 PTE_DEVICE,
130 },
131 {
132 /*
133 * Cheat and map a whole section, this will bring
134 * both PCI-X and PCI-E outbound I/O
135 */
136 IOP34X_PCIX_OIOBAR_VADDR &~ (0x100000 - 1),
137 IOP34X_PCIX_OIOBAR &~ (0x100000 - 1),
138 0x100000,
139 VM_PROT_READ|VM_PROT_WRITE,
140 PTE_DEVICE,
141 },
142 {
143 IOP34X_PCE1_VADDR,
144 IOP34X_PCE1,
145 IOP34X_PCE1_SIZE,
146 VM_PROT_READ|VM_PROT_WRITE,
147 PTE_DEVICE,
148 },
149 {
150 0,
151 0,
152 0,
153 0,
154 0,
155 }
156 };
157
158 #define SDRAM_START 0x00000000
159
160 extern vm_offset_t xscale_cache_clean_addr;
161
162 void *
initarm(struct arm_boot_params * abp)163 initarm(struct arm_boot_params *abp)
164 {
165 struct pv_addr kernel_l1pt;
166 struct pv_addr dpcpu;
167 int loop, i;
168 u_int l1pagetable;
169 vm_offset_t freemempos;
170 vm_offset_t freemem_pt;
171 vm_offset_t afterkern;
172 vm_offset_t freemem_after;
173 vm_offset_t lastaddr;
174 uint32_t memsize, memstart;
175
176 lastaddr = parse_boot_param(abp);
177 arm_physmem_kernaddr = abp->abp_physaddr;
178 set_cpufuncs();
179 pcpu_init(pcpup, 0, sizeof(struct pcpu));
180 PCPU_SET(curthread, &thread0);
181
182 /* Do basic tuning, hz etc */
183 init_param1();
184
185 freemempos = 0x00200000;
186 /* Define a macro to simplify memory allocation */
187 #define valloc_pages(var, np) \
188 alloc_pages((var).pv_pa, (np)); \
189 (var).pv_va = (var).pv_pa + 0xc0000000;
190
191 #define alloc_pages(var, np) \
192 freemempos -= (np * PAGE_SIZE); \
193 (var) = freemempos; \
194 memset((char *)(var), 0, ((np) * PAGE_SIZE));
195
196 while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0)
197 freemempos -= PAGE_SIZE;
198 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
199 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
200 if (!(loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) {
201 valloc_pages(kernel_pt_table[loop],
202 L2_TABLE_SIZE / PAGE_SIZE);
203 } else {
204 kernel_pt_table[loop].pv_pa = freemempos +
205 (loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL)) *
206 L2_TABLE_SIZE_REAL;
207 kernel_pt_table[loop].pv_va =
208 kernel_pt_table[loop].pv_pa + 0xc0000000;
209 }
210 }
211 freemem_pt = freemempos;
212 freemempos = 0x00100000;
213 /*
214 * Allocate a page for the system page mapped to V0x00000000
215 * This page will just contain the system vectors and can be
216 * shared by all processes.
217 */
218 valloc_pages(systempage, 1);
219
220 /* Allocate dynamic per-cpu area. */
221 valloc_pages(dpcpu, DPCPU_SIZE / PAGE_SIZE);
222 dpcpu_init((void *)dpcpu.pv_va, 0);
223
224 /* Allocate stacks for all modes */
225 valloc_pages(irqstack, IRQ_STACK_SIZE);
226 valloc_pages(abtstack, ABT_STACK_SIZE);
227 valloc_pages(undstack, UND_STACK_SIZE);
228 valloc_pages(kernelstack, kstack_pages);
229 valloc_pages(msgbufpv, round_page(msgbufsize) / PAGE_SIZE);
230 /*
231 * Now we start construction of the L1 page table
232 * We start by mapping the L2 page tables into the L1.
233 * This means that we can replace L1 mappings later on if necessary
234 */
235 l1pagetable = kernel_l1pt.pv_va;
236
237 /* Map the L2 pages tables in the L1 page table */
238 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00100000 - 1),
239 &kernel_pt_table[KERNEL_PT_SYS]);
240 pmap_map_chunk(l1pagetable, KERNBASE, SDRAM_START, 0x100000,
241 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
242
243 pmap_map_chunk(l1pagetable, KERNBASE + 0x100000, SDRAM_START + 0x100000,
244 0x100000, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
245
246 pmap_map_chunk(l1pagetable, KERNBASE + 0x200000, SDRAM_START + 0x200000,
247 (((uint32_t)(lastaddr) - KERNBASE - 0x200000) + L1_S_SIZE) & ~(L1_S_SIZE - 1),
248 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
249 freemem_after = ((int)lastaddr + PAGE_SIZE) & ~(PAGE_SIZE - 1);
250 afterkern = round_page(((vm_offset_t)lastaddr + L1_S_SIZE) & ~(L1_S_SIZE
251 - 1));
252 for (i = 0; i < KERNEL_PT_AFKERNEL_NUM; i++) {
253 pmap_link_l2pt(l1pagetable, afterkern + i * 0x00100000,
254 &kernel_pt_table[KERNEL_PT_AFKERNEL + i]);
255 }
256
257
258 /* Map the vector page. */
259 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
260 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
261 arm_devmap_bootstrap(l1pagetable, iq81342_devmap);
262 /*
263 * Give the XScale global cache clean code an appropriately
264 * sized chunk of unmapped VA space starting at 0xff000000
265 * (our device mappings end before this address).
266 */
267 xscale_cache_clean_addr = 0xff000000U;
268
269 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
270 setttb(kernel_l1pt.pv_pa);
271 cpu_tlb_flushID();
272 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
273 /*
274 * Pages were allocated during the secondary bootstrap for the
275 * stacks for different CPU modes.
276 * We must now set the r13 registers in the different CPU modes to
277 * point to these stacks.
278 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
279 * of the stack memory.
280 */
281
282 set_stackptrs(0);
283
284 /*
285 * We must now clean the cache again....
286 * Cleaning may be done by reading new data to displace any
287 * dirty data in the cache. This will have happened in setttb()
288 * but since we are boot strapping the addresses used for the read
289 * may have just been remapped and thus the cache could be out
290 * of sync. A re-clean after the switch will cure this.
291 * After booting there are no gross relocations of the kernel thus
292 * this problem will not occur after initarm().
293 */
294 cpu_idcache_wbinv_all();
295 cpu_setup();
296
297 i80321_calibrate_delay();
298 i81342_sdram_bounds(obio_bs_tag, IOP34X_VADDR, &memstart, &memsize);
299 physmem = memsize / PAGE_SIZE;
300 cninit();
301 /* Set stack for exception handlers */
302
303 undefined_init();
304
305 init_proc0(kernelstack.pv_va);
306
307 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
308
309 pmap_curmaxkvaddr = afterkern + PAGE_SIZE;
310
311 vm_max_kernel_address = 0xe0000000;
312 pmap_bootstrap(pmap_curmaxkvaddr, &kernel_l1pt);
313 msgbufp = (void*)msgbufpv.pv_va;
314 msgbufinit(msgbufp, msgbufsize);
315 mutex_init();
316
317 /*
318 * Add the physical ram we have available.
319 *
320 * Exclude the kernel (and all the things we allocated which immediately
321 * follow the kernel) from the VM allocation pool but not from crash
322 * dumps. virtual_avail is a global variable which tracks the kva we've
323 * "allocated" while setting up pmaps.
324 *
325 * Prepare the list of physical memory available to the vm subsystem.
326 */
327 arm_physmem_hardware_region(SDRAM_START, memsize);
328 arm_physmem_exclude_region(freemem_pt, abp->abp_physaddr -
329 freemem_pt, EXFLAG_NOALLOC);
330 arm_physmem_exclude_region(freemempos, abp->abp_physaddr - 0x100000 -
331 freemempos, EXFLAG_NOALLOC);
332 arm_physmem_exclude_region(abp->abp_physaddr,
333 virtual_avail - KERNVIRTADDR, EXFLAG_NOALLOC);
334 arm_physmem_init_kernel_globals();
335
336 init_param2(physmem);
337 kdb_init();
338 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP -
339 sizeof(struct pcb)));
340 }
341