1 /*-
2 * Copyright (c) 2009 Yohanes Nugroho <yohanes@gmail.com>
3 * Copyright (c) 1994-1998 Mark Brinicombe.
4 * Copyright (c) 1994 Brini.
5 * All rights reserved.
6 *
7 * This code is derived from software written for Brini by Mark Brinicombe
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by Brini.
20 * 4. The name of the company nor the name of the author may be used to
21 * endorse or promote products derived from this software without specific
22 * prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27 * IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
28 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
29 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
30 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 */
37
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
40
41 #include "opt_kstack_pages.h"
42
43 #define _ARM32_BUS_DMA_PRIVATE
44 #include <sys/param.h>
45 #include <sys/systm.h>
46 #include <sys/sysproto.h>
47 #include <sys/signalvar.h>
48 #include <sys/imgact.h>
49 #include <sys/kernel.h>
50 #include <sys/ktr.h>
51 #include <sys/linker.h>
52 #include <sys/lock.h>
53 #include <sys/malloc.h>
54 #include <sys/mutex.h>
55 #include <sys/pcpu.h>
56 #include <sys/proc.h>
57 #include <sys/ptrace.h>
58 #include <sys/cons.h>
59 #include <sys/bio.h>
60 #include <sys/bus.h>
61 #include <sys/buf.h>
62 #include <sys/exec.h>
63 #include <sys/kdb.h>
64 #include <sys/msgbuf.h>
65 #include <machine/physmem.h>
66 #include <machine/reg.h>
67 #include <machine/cpu.h>
68
69 #include <vm/vm.h>
70 #include <vm/pmap.h>
71 #include <vm/vm_object.h>
72 #include <vm/vm_page.h>
73 #include <vm/vm_map.h>
74 #include <machine/devmap.h>
75 #include <machine/vmparam.h>
76 #include <machine/pcb.h>
77 #include <machine/undefined.h>
78 #include <machine/machdep.h>
79 #include <machine/metadata.h>
80 #include <machine/armreg.h>
81 #include <machine/bus.h>
82 #include <sys/reboot.h>
83 #include "econa_reg.h"
84
85 /* Page table for mapping proc0 zero page */
86 #define KERNEL_PT_SYS 0
87 #define KERNEL_PT_KERN 1
88 #define KERNEL_PT_KERN_NUM 22
89 /* L2 table for mapping after kernel */
90 #define KERNEL_PT_AFKERNEL KERNEL_PT_KERN + KERNEL_PT_KERN_NUM
91 #define KERNEL_PT_AFKERNEL_NUM 5
92
93 /* this should be evenly divisable by PAGE_SIZE / L2_TABLE_SIZE_REAL (or 4) */
94 #define NUM_KERNEL_PTS (KERNEL_PT_AFKERNEL + KERNEL_PT_AFKERNEL_NUM)
95
96 struct pv_addr kernel_pt_table[NUM_KERNEL_PTS];
97
98 /* Physical and virtual addresses for some global pages */
99
100 struct pv_addr systempage;
101 struct pv_addr msgbufpv;
102 struct pv_addr irqstack;
103 struct pv_addr undstack;
104 struct pv_addr abtstack;
105 struct pv_addr kernelstack;
106
107 /* Static device mappings. */
108 static const struct arm_devmap_entry econa_devmap[] = {
109 {
110 /*
111 * This maps DDR SDRAM
112 */
113 ECONA_SDRAM_BASE, /*virtual*/
114 ECONA_SDRAM_BASE, /*physical*/
115 ECONA_SDRAM_SIZE, /*size*/
116 VM_PROT_READ|VM_PROT_WRITE,
117 PTE_DEVICE,
118 },
119 /*
120 * Map the on-board devices VA == PA so that we can access them
121 * with the MMU on or off.
122 */
123 {
124 /*
125 * This maps the interrupt controller, the UART
126 * and the timer.
127 */
128 ECONA_IO_BASE, /*virtual*/
129 ECONA_IO_BASE, /*physical*/
130 ECONA_IO_SIZE, /*size*/
131 VM_PROT_READ|VM_PROT_WRITE,
132 PTE_DEVICE,
133 },
134 {
135 /*
136 * OHCI + EHCI
137 */
138 ECONA_OHCI_VBASE, /*virtual*/
139 ECONA_OHCI_PBASE, /*physical*/
140 ECONA_USB_SIZE, /*size*/
141 VM_PROT_READ|VM_PROT_WRITE,
142 PTE_DEVICE,
143 },
144 {
145 /*
146 * CFI
147 */
148 ECONA_CFI_VBASE, /*virtual*/
149 ECONA_CFI_PBASE, /*physical*/
150 ECONA_CFI_SIZE,
151 VM_PROT_READ|VM_PROT_WRITE,
152 PTE_DEVICE,
153 },
154 {
155 0,
156 0,
157 0,
158 0,
159 0,
160 }
161 };
162
163
164 void *
initarm(struct arm_boot_params * abp)165 initarm(struct arm_boot_params *abp)
166 {
167 struct pv_addr kernel_l1pt;
168 volatile uint32_t * ddr = (uint32_t *)0x4000000C;
169 int loop, i;
170 u_int l1pagetable;
171 vm_offset_t afterkern;
172 vm_offset_t freemempos;
173 vm_offset_t lastaddr;
174 uint32_t memsize;
175 int mem_info;
176
177 boothowto = RB_VERBOSE;
178 lastaddr = parse_boot_param(abp);
179 arm_physmem_kernaddr = abp->abp_physaddr;
180 set_cpufuncs();
181 pcpu0_init();
182
183 /* Do basic tuning, hz etc */
184 init_param1();
185
186
187 freemempos = (lastaddr + PAGE_MASK) & ~PAGE_MASK;
188 /* Define a macro to simplify memory allocation */
189 #define valloc_pages(var, np) \
190 alloc_pages((var).pv_va, (np)); \
191 (var).pv_pa = (var).pv_va + (abp->abp_physaddr - KERNVIRTADDR);
192
193 #define alloc_pages(var, np) \
194 (var) = freemempos; \
195 freemempos += (np * PAGE_SIZE); \
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_va = freemempos -
207 (loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL)) *
208 L2_TABLE_SIZE_REAL;
209 kernel_pt_table[loop].pv_pa =
210 kernel_pt_table[loop].pv_va - KERNVIRTADDR +
211 abp->abp_physaddr;
212 }
213 }
214 /*
215 * Allocate a page for the system page mapped to V0x00000000
216 * This page will just contain the system vectors and can be
217 * shared by all processes.
218 */
219 valloc_pages(systempage, 1);
220
221 /* Allocate stacks for all modes */
222 valloc_pages(irqstack, IRQ_STACK_SIZE);
223 valloc_pages(abtstack, ABT_STACK_SIZE);
224 valloc_pages(undstack, UND_STACK_SIZE);
225 valloc_pages(kernelstack, kstack_pages);
226 valloc_pages(msgbufpv, round_page(msgbufsize) / PAGE_SIZE);
227
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,
237 &kernel_pt_table[KERNEL_PT_SYS]);
238 for (i = 0; i < KERNEL_PT_KERN_NUM; i++)
239 pmap_link_l2pt(l1pagetable, KERNBASE + i * L1_S_SIZE,
240 &kernel_pt_table[KERNEL_PT_KERN + i]);
241 pmap_map_chunk(l1pagetable, KERNBASE, PHYSADDR,
242 (((uint32_t)lastaddr - KERNBASE) + PAGE_SIZE) & ~(PAGE_SIZE - 1),
243 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
244 afterkern = round_page((lastaddr + L1_S_SIZE) & ~(L1_S_SIZE - 1));
245 for (i = 0; i < KERNEL_PT_AFKERNEL_NUM; i++) {
246 pmap_link_l2pt(l1pagetable, afterkern + i * L1_S_SIZE,
247 &kernel_pt_table[KERNEL_PT_AFKERNEL + i]);
248 }
249
250 /* Map the vector page. */
251 pmap_map_entry(l1pagetable, ARM_VECTORS_HIGH, systempage.pv_pa,
252 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
253
254
255 /* Map the stack pages */
256 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
257 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
258 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
259 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
260 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
261 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
262 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
263 kstack_pages * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
264
265 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
266 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
267 pmap_map_chunk(l1pagetable, msgbufpv.pv_va, msgbufpv.pv_pa,
268 msgbufsize, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
269
270 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
271 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
272 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
273 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
274 }
275
276 arm_devmap_bootstrap(l1pagetable, econa_devmap);
277 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
278 setttb(kernel_l1pt.pv_pa);
279 cpu_tlb_flushID();
280 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
281 cninit();
282 mem_info = ((*ddr) >> 4) & 0x3;
283 memsize = (8<<mem_info)*1024*1024;
284
285 /*
286 * Pages were allocated during the secondary bootstrap for the
287 * stacks for different CPU modes.
288 * We must now set the r13 registers in the different CPU modes to
289 * point to these stacks.
290 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
291 * of the stack memory.
292 */
293 cpu_control(CPU_CONTROL_MMU_ENABLE, CPU_CONTROL_MMU_ENABLE);
294
295 set_stackptrs(0);
296
297 /*
298 * We must now clean the cache again....
299 * Cleaning may be done by reading new data to displace any
300 * dirty data in the cache. This will have happened in setttb()
301 * but since we are boot strapping the addresses used for the read
302 * may have just been remapped and thus the cache could be out
303 * of sync. A re-clean after the switch will cure this.
304 * After booting there are no gross relocations of the kernel thus
305 * this problem will not occur after initarm().
306 */
307 cpu_idcache_wbinv_all();
308 cpu_setup();
309
310 undefined_init();
311
312 init_proc0(kernelstack.pv_va);
313
314 arm_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL);
315
316 pmap_curmaxkvaddr = afterkern + L1_S_SIZE * (KERNEL_PT_KERN_NUM - 1);
317 vm_max_kernel_address = KERNVIRTADDR + 3 * memsize;
318 pmap_bootstrap(freemempos, &kernel_l1pt);
319
320 msgbufp = (void*)msgbufpv.pv_va;
321 msgbufinit(msgbufp, msgbufsize);
322
323 mutex_init();
324
325 /*
326 * Add the physical ram we have available.
327 *
328 * Exclude the kernel, and all the things we allocated which immediately
329 * follow the kernel, from the VM allocation pool but not from crash
330 * dumps. virtual_avail is a global variable which tracks the kva we've
331 * "allocated" while setting up pmaps.
332 *
333 * Prepare the list of physical memory available to the vm subsystem.
334 */
335 arm_physmem_hardware_region(PHYSADDR, memsize);
336 arm_physmem_exclude_region(abp->abp_physaddr,
337 virtual_avail - KERNVIRTADDR, EXFLAG_NOALLOC);
338 arm_physmem_init_kernel_globals();
339
340 init_param2(physmem);
341 kdb_init();
342
343 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP -
344 sizeof(struct pcb)));
345 }
346