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 #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/devmap.h>
82 #include <machine/vmparam.h>
83 #include <machine/pcb.h>
84 #include <machine/undefined.h>
85 #include <machine/machdep.h>
86 #include <machine/metadata.h>
87 #include <machine/armreg.h>
88 #include <machine/bus.h>
89 #include <machine/physmem.h>
90 #include <sys/reboot.h>
91
92
93 #include <arm/xscale/i80321/i80321var.h> /* For i80321_calibrate_delay() */
94
95 #include <arm/xscale/i8134x/i81342reg.h>
96 #include <arm/xscale/i8134x/i81342var.h>
97 #include <arm/xscale/i8134x/obiovar.h>
98
99
100 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */
101 #define KERNEL_PT_IOPXS 1
102 #define KERNEL_PT_BEFOREKERN 2
103 #define KERNEL_PT_AFKERNEL 3 /* L2 table for mapping after kernel */
104 #define KERNEL_PT_AFKERNEL_NUM 9
105
106 /* this should be evenly divisable by PAGE_SIZE / L2_TABLE_SIZE_REAL (or 4) */
107 #define NUM_KERNEL_PTS (KERNEL_PT_AFKERNEL + KERNEL_PT_AFKERNEL_NUM)
108
109 struct pv_addr kernel_pt_table[NUM_KERNEL_PTS];
110
111 /* Physical and virtual addresses for some global pages */
112
113 struct pv_addr systempage;
114 struct pv_addr msgbufpv;
115 struct pv_addr irqstack;
116 struct pv_addr undstack;
117 struct pv_addr abtstack;
118 struct pv_addr kernelstack;
119
120 /* Static device mappings. */
121 static const struct arm_devmap_entry iq81342_devmap[] = {
122 {
123 IOP34X_VADDR,
124 IOP34X_HWADDR,
125 IOP34X_SIZE,
126 VM_PROT_READ|VM_PROT_WRITE,
127 PTE_DEVICE,
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 IOP34X_PCIX_OIOBAR_VADDR &~ (0x100000 - 1),
135 IOP34X_PCIX_OIOBAR &~ (0x100000 - 1),
136 0x100000,
137 VM_PROT_READ|VM_PROT_WRITE,
138 PTE_DEVICE,
139 },
140 {
141 IOP34X_PCE1_VADDR,
142 IOP34X_PCE1,
143 IOP34X_PCE1_SIZE,
144 VM_PROT_READ|VM_PROT_WRITE,
145 PTE_DEVICE,
146 },
147 {
148 0,
149 0,
150 0,
151 0,
152 0,
153 }
154 };
155
156 #define SDRAM_START 0x00000000
157
158 extern vm_offset_t xscale_cache_clean_addr;
159
160 void *
initarm(struct arm_boot_params * abp)161 initarm(struct arm_boot_params *abp)
162 {
163 struct pv_addr kernel_l1pt;
164 struct pv_addr dpcpu;
165 int loop, i;
166 u_int l1pagetable;
167 vm_offset_t freemempos;
168 vm_offset_t freemem_pt;
169 vm_offset_t afterkern;
170 vm_offset_t freemem_after;
171 vm_offset_t lastaddr;
172 uint32_t memsize, memstart;
173
174 lastaddr = parse_boot_param(abp);
175 arm_physmem_kernaddr = abp->abp_physaddr;
176 set_cpufuncs();
177 pcpu_init(pcpup, 0, sizeof(struct pcpu));
178 PCPU_SET(curthread, &thread0);
179
180 /* Do basic tuning, hz etc */
181 init_param1();
182
183 freemempos = 0x00200000;
184 /* Define a macro to simplify memory allocation */
185 #define valloc_pages(var, np) \
186 alloc_pages((var).pv_pa, (np)); \
187 (var).pv_va = (var).pv_pa + 0xc0000000;
188
189 #define alloc_pages(var, np) \
190 freemempos -= (np * PAGE_SIZE); \
191 (var) = freemempos; \
192 memset((char *)(var), 0, ((np) * PAGE_SIZE));
193
194 while (((freemempos - L1_TABLE_SIZE) & (L1_TABLE_SIZE - 1)) != 0)
195 freemempos -= PAGE_SIZE;
196 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
197 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
198 if (!(loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) {
199 valloc_pages(kernel_pt_table[loop],
200 L2_TABLE_SIZE / PAGE_SIZE);
201 } else {
202 kernel_pt_table[loop].pv_pa = freemempos +
203 (loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL)) *
204 L2_TABLE_SIZE_REAL;
205 kernel_pt_table[loop].pv_va =
206 kernel_pt_table[loop].pv_pa + 0xc0000000;
207 }
208 }
209 freemem_pt = freemempos;
210 freemempos = 0x00100000;
211 /*
212 * Allocate a page for the system page mapped to V0x00000000
213 * This page will just contain the system vectors and can be
214 * shared by all processes.
215 */
216 valloc_pages(systempage, 1);
217
218 /* Allocate dynamic per-cpu area. */
219 valloc_pages(dpcpu, DPCPU_SIZE / PAGE_SIZE);
220 dpcpu_init((void *)dpcpu.pv_va, 0);
221
222 /* Allocate stacks for all modes */
223 valloc_pages(irqstack, IRQ_STACK_SIZE);
224 valloc_pages(abtstack, ABT_STACK_SIZE);
225 valloc_pages(undstack, UND_STACK_SIZE);
226 valloc_pages(kernelstack, KSTACK_PAGES);
227 valloc_pages(msgbufpv, round_page(msgbufsize) / PAGE_SIZE);
228 /*
229 * Now we start construction of the L1 page table
230 * We start by mapping the L2 page tables into the L1.
231 * This means that we can replace L1 mappings later on if necessary
232 */
233 l1pagetable = kernel_l1pt.pv_va;
234
235 /* Map the L2 pages tables in the L1 page table */
236 pmap_link_l2pt(l1pagetable, ARM_VECTORS_HIGH & ~(0x00100000 - 1),
237 &kernel_pt_table[KERNEL_PT_SYS]);
238 pmap_map_chunk(l1pagetable, KERNBASE, SDRAM_START, 0x100000,
239 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
240
241 pmap_map_chunk(l1pagetable, KERNBASE + 0x100000, SDRAM_START + 0x100000,
242 0x100000, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
243
244 pmap_map_chunk(l1pagetable, KERNBASE + 0x200000, SDRAM_START + 0x200000,
245 (((uint32_t)(lastaddr) - KERNBASE - 0x200000) + L1_S_SIZE) & ~(L1_S_SIZE - 1),
246 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
247 freemem_after = ((int)lastaddr + PAGE_SIZE) & ~(PAGE_SIZE - 1);
248 afterkern = round_page(((vm_offset_t)lastaddr + L1_S_SIZE) & ~(L1_S_SIZE
249 - 1));
250 for (i = 0; i < KERNEL_PT_AFKERNEL_NUM; i++) {
251 pmap_link_l2pt(l1pagetable, afterkern + i * 0x00100000,
252 &kernel_pt_table[KERNEL_PT_AFKERNEL + i]);
253 }
254
255
256 /* Map the vector page. */
257 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
258 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
259 arm_devmap_bootstrap(l1pagetable, iq81342_devmap);
260 /*
261 * Give the XScale global cache clean code an appropriately
262 * sized chunk of unmapped VA space starting at 0xff000000
263 * (our device mappings end before this address).
264 */
265 xscale_cache_clean_addr = 0xff000000U;
266
267 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
268 setttb(kernel_l1pt.pv_pa);
269 cpu_tlb_flushID();
270 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
271 /*
272 * Pages were allocated during the secondary bootstrap for the
273 * stacks for different CPU modes.
274 * We must now set the r13 registers in the different CPU modes to
275 * point to these stacks.
276 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
277 * of the stack memory.
278 */
279
280 set_stackptrs(0);
281
282 /*
283 * We must now clean the cache again....
284 * Cleaning may be done by reading new data to displace any
285 * dirty data in the cache. This will have happened in setttb()
286 * but since we are boot strapping the addresses used for the read
287 * may have just been remapped and thus the cache could be out
288 * of sync. A re-clean after the switch will cure this.
289 * After booting there are no gross relocations of the kernel thus
290 * this problem will not occur after initarm().
291 */
292 cpu_idcache_wbinv_all();
293 cpu_setup("");
294
295 i80321_calibrate_delay();
296 i81342_sdram_bounds(obio_bs_tag, IOP34X_VADDR, &memstart, &memsize);
297 physmem = memsize / PAGE_SIZE;
298 cninit();
299 /* Set stack for exception handlers */
300
301 undefined_init();
302
303 init_proc0(kernelstack.pv_va);
304
305 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
306
307 pmap_curmaxkvaddr = afterkern + PAGE_SIZE;
308
309 vm_max_kernel_address = 0xd0000000;
310 pmap_bootstrap(pmap_curmaxkvaddr, &kernel_l1pt);
311 msgbufp = (void*)msgbufpv.pv_va;
312 msgbufinit(msgbufp, msgbufsize);
313 mutex_init();
314
315 /*
316 * Add the physical ram we have available.
317 *
318 * Exclude the kernel (and all the things we allocated which immediately
319 * follow the kernel) from the VM allocation pool but not from crash
320 * dumps. virtual_avail is a global variable which tracks the kva we've
321 * "allocated" while setting up pmaps.
322 *
323 * Prepare the list of physical memory available to the vm subsystem.
324 */
325 arm_physmem_hardware_region(SDRAM_START, memsize);
326 arm_physmem_exclude_region(abp->abp_physaddr,
327 virtual_avail - KERNVIRTADDR, EXFLAG_NOALLOC);
328 arm_physmem_init_kernel_globals();
329
330 init_param2(physmem);
331 kdb_init();
332 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP -
333 sizeof(struct pcb)));
334 }
335