2 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
3 * Copyright (C) 1995, 1996 TooLs GmbH.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by TooLs GmbH.
17 * 4. The name of TooLs GmbH may not be used to endorse or promote products
18 * derived from this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 * Copyright (C) 2001 Benno Rice
33 * All rights reserved.
35 * Redistribution and use in source and binary forms, with or without
36 * modification, are permitted provided that the following conditions
38 * 1. Redistributions of source code must retain the above copyright
39 * notice, this list of conditions and the following disclaimer.
40 * 2. Redistributions in binary form must reproduce the above copyright
41 * notice, this list of conditions and the following disclaimer in the
42 * documentation and/or other materials provided with the distribution.
44 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
45 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
46 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
47 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
48 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
49 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
50 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
51 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
52 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
53 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
54 * $NetBSD: machdep.c,v 1.74.2.1 2000/11/01 16:13:48 tv Exp $
57 #include <sys/cdefs.h>
58 __FBSDID("$FreeBSD$");
60 #include "opt_compat.h"
62 #include "opt_kstack_pages.h"
63 #include "opt_platform.h"
65 #include <sys/param.h>
67 #include <sys/systm.h>
73 #include <sys/eventhandler.h>
75 #include <sys/imgact.h>
77 #include <sys/kernel.h>
79 #include <sys/linker.h>
81 #include <sys/malloc.h>
83 #include <sys/msgbuf.h>
84 #include <sys/mutex.h>
85 #include <sys/ptrace.h>
86 #include <sys/reboot.h>
87 #include <sys/rwlock.h>
88 #include <sys/signalvar.h>
89 #include <sys/syscallsubr.h>
90 #include <sys/sysctl.h>
91 #include <sys/sysent.h>
92 #include <sys/sysproto.h>
93 #include <sys/ucontext.h>
95 #include <sys/vmmeter.h>
96 #include <sys/vnode.h>
98 #include <net/netisr.h>
101 #include <vm/vm_extern.h>
102 #include <vm/vm_kern.h>
103 #include <vm/vm_page.h>
104 #include <vm/vm_map.h>
105 #include <vm/vm_object.h>
106 #include <vm/vm_pager.h>
108 #include <machine/altivec.h>
109 #ifndef __powerpc64__
110 #include <machine/bat.h>
112 #include <machine/cpu.h>
113 #include <machine/elf.h>
114 #include <machine/fpu.h>
115 #include <machine/hid.h>
116 #include <machine/kdb.h>
117 #include <machine/md_var.h>
118 #include <machine/metadata.h>
119 #include <machine/mmuvar.h>
120 #include <machine/pcb.h>
121 #include <machine/reg.h>
122 #include <machine/sigframe.h>
123 #include <machine/spr.h>
124 #include <machine/trap.h>
125 #include <machine/vmparam.h>
126 #include <machine/ofw_machdep.h>
130 #include <dev/ofw/openfirm.h>
131 #include <dev/ofw/ofw_subr.h>
135 int cacheline_size = 128;
137 int cacheline_size = 32;
139 int hw_direct_map = 1;
141 extern void *ap_pcpu;
143 struct pcpu __pcpu[MAXCPU];
144 static char init_kenv[2048];
146 static struct trapframe frame0;
148 char machine[] = "powerpc";
149 SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, "");
151 static void cpu_startup(void *);
152 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
154 SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size,
155 CTLFLAG_RD, &cacheline_size, 0, "");
157 uintptr_t powerpc_init(vm_offset_t, vm_offset_t, vm_offset_t, void *);
162 struct kva_md_info kmi;
165 cpu_startup(void *dummy)
169 * Initialise the decrementer-based clock.
174 * Good {morning,afternoon,evening,night}.
176 cpu_setup(PCPU_GET(cpuid));
181 printf("real memory = %ju (%ju MB)\n", ptoa((uintmax_t)physmem),
182 ptoa((uintmax_t)physmem) / 1048576);
186 printf("available KVA = %zu (%zu MB)\n",
187 virtual_end - virtual_avail,
188 (virtual_end - virtual_avail) / 1048576);
191 * Display any holes after the first chunk of extended memory.
196 printf("Physical memory chunk(s):\n");
197 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) {
199 phys_avail[indx + 1] - phys_avail[indx];
202 printf("0x%016jx - 0x%016jx, %ju bytes (%ju pages)\n",
204 printf("0x%09jx - 0x%09jx, %ju bytes (%ju pages)\n",
206 (uintmax_t)phys_avail[indx],
207 (uintmax_t)phys_avail[indx + 1] - 1,
208 (uintmax_t)size1, (uintmax_t)size1 / PAGE_SIZE);
212 vm_ksubmap_init(&kmi);
214 printf("avail memory = %ju (%ju MB)\n",
215 ptoa((uintmax_t)vm_cnt.v_free_count),
216 ptoa((uintmax_t)vm_cnt.v_free_count) / 1048576);
219 * Set up buffers, so they can be used to read disk labels.
222 vm_pager_bufferinit();
225 extern vm_offset_t __startkernel, __endkernel;
226 extern unsigned char __bss_start[];
227 extern unsigned char __sbss_start[];
228 extern unsigned char __sbss_end[];
229 extern unsigned char _end[];
231 void aim_cpu_init(vm_offset_t toc);
232 void booke_cpu_init(void);
235 powerpc_init(vm_offset_t fdt, vm_offset_t toc, vm_offset_t ofentry, void *mdp)
238 vm_offset_t startkernel, endkernel;
241 bool ofw_bootargs = false;
243 vm_offset_t ksym_start;
244 vm_offset_t ksym_end;
249 /* First guess at start/end kernel positions */
250 startkernel = __startkernel;
251 endkernel = __endkernel;
253 /* Check for ePAPR loader, which puts a magic value into r6 */
254 if (mdp == (void *)0x65504150)
259 * If running from an FDT, make sure we are in real mode to avoid
260 * tromping on firmware page tables. Everything in the kernel assumes
261 * 1:1 mappings out of firmware, so this won't break anything not
262 * already broken. This doesn't work if there is live OF, since OF
263 * may internally use non-1:1 mappings.
266 mtmsr(mfmsr() & ~(PSL_IR | PSL_DR));
270 * Parse metadata if present and fetch parameters. Must be done
271 * before console is inited so cninit gets the right value of
275 preload_metadata = mdp;
276 kmdp = preload_search_by_type("elf kernel");
278 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
279 init_static_kenv(MD_FETCH(kmdp, MODINFOMD_ENVP, char *),
281 endkernel = ulmax(endkernel, MD_FETCH(kmdp,
282 MODINFOMD_KERNEND, vm_offset_t));
284 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t);
285 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t);
286 db_fetch_ksymtab(ksym_start, ksym_end);
292 * On BOOKE the BSS is already cleared and some variables
293 * initialized. Do not wipe them out.
295 bzero(__sbss_start, __sbss_end - __sbss_start);
296 bzero(__bss_start, _end - __bss_start);
298 init_static_kenv(init_kenv, sizeof(init_kenv));
301 /* Store boot environment state */
302 OF_initial_setup((void *)fdt, NULL, (int (*)(void *))ofentry);
305 * Init params/tunables that can be overridden by the loader
310 * Start initializing proc0 and thread0.
312 proc_linkup0(&proc0, &thread0);
313 thread0.td_frame = &frame0;
316 * Set up per-cpu data.
319 pcpu_init(pc, 0, sizeof(struct pcpu));
320 pc->pc_curthread = &thread0;
322 __asm __volatile("mr 13,%0" :: "r"(pc->pc_curthread));
324 __asm __volatile("mr 2,%0" :: "r"(pc->pc_curthread));
328 __asm __volatile("mtsprg 0, %0" :: "r"(pc));
331 * Init mutexes, which we use heavily in PMAP
337 * Install the OF client interface
343 ofw_parse_bootargs();
346 * Initialize the console before printing anything.
351 * Complain if there is no metadata.
353 if (mdp == NULL || kmdp == NULL) {
354 printf("powerpc_init: no loader metadata.\n");
368 /* Make sure the kernel icache is valid before we go too much further */
369 __syncicache((caddr_t)startkernel, endkernel - startkernel);
373 * Choose a platform module so we can get the physical memory map.
376 platform_probe_and_attach();
381 pmap_bootstrap(startkernel, endkernel);
382 mtmsr(PSL_KERNSET & ~PSL_EE);
385 * Initialize params/tunables that are derived from memsize
387 init_param2(physmem);
390 * Grab booted kernel's name
392 env = kern_getenv("kernelname");
394 strlcpy(kernelname, env, sizeof(kernelname));
399 * Finish setting up thread0.
401 thread0.td_pcb = (struct pcb *)
402 ((thread0.td_kstack + thread0.td_kstack_pages * PAGE_SIZE -
403 sizeof(struct pcb)) & ~15UL);
404 bzero((void *)thread0.td_pcb, sizeof(struct pcb));
405 pc->pc_curpcb = thread0.td_pcb;
407 /* Initialise the message buffer. */
408 msgbufinit(msgbufp, msgbufsize);
411 if (boothowto & RB_KDB)
412 kdb_enter(KDB_WHY_BOOTFLAGS,
413 "Boot flags requested debugger");
416 return (((uintptr_t)thread0.td_pcb -
417 (sizeof(struct callframe) - 3*sizeof(register_t))) & ~15UL);
421 bzero(void *buf, size_t len)
427 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) {
432 while (len >= sizeof(u_long) * 8) {
434 *((u_long*) p + 1) = 0;
435 *((u_long*) p + 2) = 0;
436 *((u_long*) p + 3) = 0;
437 len -= sizeof(u_long) * 8;
438 *((u_long*) p + 4) = 0;
439 *((u_long*) p + 5) = 0;
440 *((u_long*) p + 6) = 0;
441 *((u_long*) p + 7) = 0;
442 p += sizeof(u_long) * 8;
445 while (len >= sizeof(u_long)) {
447 len -= sizeof(u_long);
458 * Flush the D-cache for non-DMA I/O so that the I-cache can
459 * be made coherent later.
462 cpu_flush_dcache(void *ptr, size_t len)
464 register_t addr, off;
467 * Align the address to a cacheline and adjust the length
468 * accordingly. Then round the length to a multiple of the
469 * cacheline for easy looping.
471 addr = (uintptr_t)ptr;
472 off = addr & (cacheline_size - 1);
474 len = roundup2(len + off, cacheline_size);
477 __asm __volatile ("dcbf 0,%0" :: "r"(addr));
478 __asm __volatile ("sync");
479 addr += cacheline_size;
480 len -= cacheline_size;
485 ptrace_set_pc(struct thread *td, unsigned long addr)
487 struct trapframe *tf;
490 tf->srr0 = (register_t)addr;
502 if (td->td_md.md_spinlock_count == 0) {
503 __asm __volatile("or 2,2,2"); /* Set high thread priority */
504 msr = intr_disable();
505 td->td_md.md_spinlock_count = 1;
506 td->td_md.md_saved_msr = msr;
508 td->td_md.md_spinlock_count++;
520 msr = td->td_md.md_saved_msr;
521 td->td_md.md_spinlock_count--;
522 if (td->td_md.md_spinlock_count == 0) {
524 __asm __volatile("or 6,6,6"); /* Set normal thread priority */
529 * Simple ddb(4) command/hack to view any SPR on the running CPU.
530 * Uses a trivial asm function to perform the mfspr, and rewrites the mfspr
531 * instruction each time.
532 * XXX: Since it uses code modification, it won't work if the kernel code pages
535 extern register_t get_spr(int);
538 DB_SHOW_COMMAND(spr, db_show_spr)
541 volatile uint32_t *p;
542 int sprno, saved_sprno;
547 saved_sprno = sprno = (intptr_t) addr;
548 sprno = ((sprno & 0x3e0) >> 5) | ((sprno & 0x1f) << 5);
549 p = (uint32_t *)(void *)&get_spr;
550 *p = (*p & ~0x001ff800) | (sprno << 11);
551 __syncicache(get_spr, cacheline_size);
552 spr = get_spr(sprno);
554 db_printf("SPR %d(%x): %lx\n", saved_sprno, saved_sprno,