1 /* $NetBSD: hpc_machdep.c,v 1.70 2003/09/16 08:18:22 agc Exp $ */
4 * Copyright (c) 1994-1998 Mark Brinicombe.
5 * Copyright (c) 1994 Brini.
8 * This code is derived from software written for Brini by Mark Brinicombe
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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
37 * RiscBSD kernel project
41 * Machine dependant functions for kernel setup
43 * This file needs a lot of work.
49 #include <sys/cdefs.h>
50 __FBSDID("$FreeBSD$");
54 #define _ARM32_BUS_DMA_PRIVATE
55 #include <sys/param.h>
56 #include <sys/systm.h>
57 #include <sys/sysproto.h>
58 #include <sys/signalvar.h>
59 #include <sys/imgact.h>
60 #include <sys/kernel.h>
62 #include <sys/linker.h>
64 #include <sys/malloc.h>
65 #include <sys/mutex.h>
68 #include <sys/ptrace.h>
75 #include <machine/reg.h>
76 #include <machine/cpu.h>
80 #include <vm/vm_object.h>
81 #include <vm/vm_page.h>
82 #include <vm/vm_map.h>
83 #include <machine/vmparam.h>
84 #include <machine/pcb.h>
85 #include <machine/undefined.h>
86 #include <machine/machdep.h>
87 #include <machine/metadata.h>
88 #include <machine/armreg.h>
89 #include <machine/bus.h>
90 #include <sys/reboot.h>
92 #include <arm/sa11x0/sa11x0_reg.h>
94 #define MDROOT_ADDR 0xd0400000
96 #define KERNEL_PT_VMEM 0 /* Page table for mapping video memory */
97 #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */
98 #define KERNEL_PT_IO 3 /* Page table for mapping IO */
99 #define KERNEL_PT_IRQ 2 /* Page table for mapping irq handler */
100 #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */
101 #define KERNEL_PT_L1 4 /* Page table for mapping l1pt */
102 #define KERNEL_PT_VMDATA 5 /* Page tables for mapping kernel VM */
103 #define KERNEL_PT_VMDATA_NUM 7 /* start with 16MB of KVM */
104 #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM)
106 #define KERNEL_VM_BASE (KERNBASE + 0x00100000)
107 #define KERNEL_VM_SIZE 0x05000000
109 extern u_int data_abort_handler_address;
110 extern u_int prefetch_abort_handler_address;
111 extern u_int undefined_handler_address;
113 struct pv_addr kernel_pt_table[NUM_KERNEL_PTS];
115 extern vm_offset_t sa1110_uart_vaddr;
117 extern vm_offset_t sa1_cache_clean_addr;
120 #define MD_ROOT_SIZE 65535
122 /* Physical and virtual addresses for some global pages */
124 vm_paddr_t phys_avail[10];
125 vm_paddr_t dump_avail[4];
126 vm_paddr_t physical_start;
127 vm_paddr_t physical_end;
128 vm_paddr_t physical_freestart;
130 struct pv_addr systempage;
131 struct pv_addr irqstack;
132 struct pv_addr undstack;
133 struct pv_addr abtstack;
134 struct pv_addr kernelstack;
136 /* Static device mappings. */
137 static const struct pmap_devmap assabet_devmap[] = {
139 * Map the on-board devices VA == PA so that we can access them
140 * with the MMU on or off.
146 VM_PROT_READ|VM_PROT_WRITE,
153 VM_PROT_READ|VM_PROT_WRITE,
165 struct arm32_dma_range *
166 bus_dma_get_range(void)
173 bus_dma_get_range_nb(void)
185 #define CPU_SA110_CACHE_CLEAN_SIZE (0x4000 * 2)
188 initarm(struct arm_boot_params *abp)
190 struct pv_addr kernel_l1pt;
191 struct pv_addr md_addr;
192 struct pv_addr md_bla;
193 struct pv_addr dpcpu;
196 vm_offset_t freemempos;
197 vm_offset_t lastalloced;
198 vm_offset_t lastaddr;
199 uint32_t memsize = 32 * 1024 * 1024;
200 sa1110_uart_vaddr = SACOM1_VBASE;
202 boothowto = RB_VERBOSE | RB_SINGLE; /* Default value */
203 lastaddr = parse_boot_param(abp);
206 physmem = memsize / PAGE_SIZE;
209 /* Do basic tuning, hz etc */
212 physical_start = (vm_offset_t) KERNBASE;
213 physical_end = lastaddr;
214 physical_freestart = (((vm_offset_t)physical_end) + PAGE_MASK) & ~PAGE_MASK;
215 md_addr.pv_va = md_addr.pv_pa = MDROOT_ADDR;
216 freemempos = (vm_offset_t)round_page(physical_freestart);
217 memset((void *)freemempos, 0, 256*1024);
218 /* Define a macro to simplify memory allocation */
219 #define valloc_pages(var, np) \
220 alloc_pages((var).pv_pa, (np)); \
221 (var).pv_va = (var).pv_pa;
223 #define alloc_pages(var, np) \
224 (var) = freemempos; \
225 freemempos += ((np) * PAGE_SIZE);\
226 memset((char *)(var), 0, ((np) * PAGE_SIZE));
228 while ((freemempos & (L1_TABLE_SIZE - 1)) != 0)
229 freemempos += PAGE_SIZE;
230 valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE);
231 valloc_pages(md_bla, L2_TABLE_SIZE / PAGE_SIZE);
232 alloc_pages(sa1_cache_clean_addr, CPU_SA110_CACHE_CLEAN_SIZE / PAGE_SIZE);
234 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
235 if (!(loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL))) {
236 valloc_pages(kernel_pt_table[loop],
237 L2_TABLE_SIZE / PAGE_SIZE);
239 kernel_pt_table[loop].pv_pa = freemempos +
240 (loop % (PAGE_SIZE / L2_TABLE_SIZE_REAL)) *
242 kernel_pt_table[loop].pv_va =
243 kernel_pt_table[loop].pv_pa;
248 * Allocate a page for the system page mapped to V0x00000000
249 * This page will just contain the system vectors and can be
250 * shared by all processes.
252 valloc_pages(systempage, 1);
254 /* Allocate dynamic per-cpu area. */
255 valloc_pages(dpcpu, DPCPU_SIZE / PAGE_SIZE);
256 dpcpu_init((void *)dpcpu.pv_va, 0);
258 /* Allocate stacks for all modes */
259 valloc_pages(irqstack, IRQ_STACK_SIZE);
260 valloc_pages(abtstack, ABT_STACK_SIZE);
261 valloc_pages(undstack, UND_STACK_SIZE);
262 valloc_pages(kernelstack, KSTACK_PAGES);
263 lastalloced = kernelstack.pv_va;
266 * Allocate memory for the l1 and l2 page tables. The scheme to avoid
267 * wasting memory by allocating the l1pt on the first 16k memory was
268 * taken from NetBSD rpc_machdep.c. NKPT should be greater than 12 for
269 * this to work (which is supposed to be the case).
273 * Now we start construction of the L1 page table
274 * We start by mapping the L2 page tables into the L1.
275 * This means that we can replace L1 mappings later on if necessary
277 l1pagetable = kernel_l1pt.pv_pa;
280 /* Map the L2 pages tables in the L1 page table */
281 pmap_link_l2pt(l1pagetable, 0x00000000,
282 &kernel_pt_table[KERNEL_PT_SYS]);
283 pmap_link_l2pt(l1pagetable, KERNBASE,
284 &kernel_pt_table[KERNEL_PT_KERNEL]);
285 pmap_link_l2pt(l1pagetable, 0xd0000000,
286 &kernel_pt_table[KERNEL_PT_IO]);
287 pmap_link_l2pt(l1pagetable, lastalloced & ~((L1_S_SIZE * 4) - 1),
288 &kernel_pt_table[KERNEL_PT_L1]);
289 pmap_link_l2pt(l1pagetable, 0x90000000, &kernel_pt_table[KERNEL_PT_IRQ]);
290 pmap_link_l2pt(l1pagetable, MDROOT_ADDR,
292 for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; ++loop)
293 pmap_link_l2pt(l1pagetable, KERNEL_VM_BASE + loop * 0x00100000,
294 &kernel_pt_table[KERNEL_PT_VMDATA + loop]);
295 pmap_map_chunk(l1pagetable, KERNBASE, KERNBASE,
296 ((uint32_t)lastaddr - KERNBASE), VM_PROT_READ|VM_PROT_WRITE,
298 /* Map the DPCPU pages */
299 pmap_map_chunk(l1pagetable, dpcpu.pv_va, dpcpu.pv_pa, DPCPU_SIZE,
300 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
301 /* Map the stack pages */
302 pmap_map_chunk(l1pagetable, irqstack.pv_va, irqstack.pv_pa,
303 IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
304 pmap_map_chunk(l1pagetable, md_addr.pv_va, md_addr.pv_pa,
305 MD_ROOT_SIZE * 1024, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
306 pmap_map_chunk(l1pagetable, abtstack.pv_va, abtstack.pv_pa,
307 ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
308 pmap_map_chunk(l1pagetable, undstack.pv_va, undstack.pv_pa,
309 UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
310 pmap_map_chunk(l1pagetable, kernelstack.pv_va, kernelstack.pv_pa,
311 KSTACK_PAGES * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
313 pmap_map_chunk(l1pagetable, kernel_l1pt.pv_va, kernel_l1pt.pv_pa,
314 L1_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
316 for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) {
317 pmap_map_chunk(l1pagetable, kernel_pt_table[loop].pv_va,
318 kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE,
319 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
321 pmap_map_chunk(l1pagetable, md_bla.pv_va, md_bla.pv_pa, L2_TABLE_SIZE,
322 VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE);
323 /* Map the vector page. */
324 pmap_map_entry(l1pagetable, vector_page, systempage.pv_pa,
325 VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
326 /* Map the statically mapped devices. */
327 pmap_devmap_bootstrap(l1pagetable, assabet_devmap);
328 pmap_map_chunk(l1pagetable, sa1_cache_clean_addr, 0xf0000000,
329 CPU_SA110_CACHE_CLEAN_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE);
331 data_abort_handler_address = (u_int)data_abort_handler;
332 prefetch_abort_handler_address = (u_int)prefetch_abort_handler;
333 undefined_handler_address = (u_int)undefinedinstruction_bounce;
335 cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT);
336 setttb(kernel_l1pt.pv_pa);
338 cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2));
341 * Pages were allocated during the secondary bootstrap for the
342 * stacks for different CPU modes.
343 * We must now set the r13 registers in the different CPU modes to
344 * point to these stacks.
345 * Since the ARM stacks use STMFD etc. we must set r13 to the top end
346 * of the stack memory.
351 * We must now clean the cache again....
352 * Cleaning may be done by reading new data to displace any
353 * dirty data in the cache. This will have happened in setttb()
354 * but since we are boot strapping the addresses used for the read
355 * may have just been remapped and thus the cache could be out
356 * of sync. A re-clean after the switch will cure this.
357 * After booting there are no gross relocations of the kernel thus
358 * this problem will not occur after initarm().
360 cpu_idcache_wbinv_all();
364 /* Set stack for exception handlers */
366 init_proc0(kernelstack.pv_va);
369 /* Enable MMU, I-cache, D-cache, write buffer. */
371 cpufunc_control(0x337f, 0x107d);
372 arm_vector_init(ARM_VECTORS_LOW, ARM_VEC_ALL);
374 pmap_curmaxkvaddr = freemempos + KERNEL_PT_VMDATA_NUM * 0x400000;
376 dump_avail[0] = phys_avail[0] = round_page(virtual_avail);
377 dump_avail[1] = phys_avail[1] = 0xc0000000 + 0x02000000 - 1;
378 dump_avail[2] = phys_avail[2] = 0;
379 dump_avail[3] = phys_avail[3] = 0;
382 vm_max_kernel_address = 0xd0000000;
383 pmap_bootstrap(freemempos, &kernel_l1pt);
385 init_param2(physmem);
387 return ((void *)(kernelstack.pv_va + USPACE_SVC_STACK_TOP -
388 sizeof(struct pcb)));