2 * Copyright (C) 2006-2012 Semihalf
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
17 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
18 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
19 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
21 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
22 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
23 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 * Copyright (C) 2001 Benno Rice
27 * All rights reserved.
29 * Redistribution and use in source and binary forms, with or without
30 * modification, are permitted provided that the following conditions
32 * 1. Redistributions of source code must retain the above copyright
33 * notice, this list of conditions and the following disclaimer.
34 * 2. Redistributions in binary form must reproduce the above copyright
35 * notice, this list of conditions and the following disclaimer in the
36 * documentation and/or other materials provided with the distribution.
38 * THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
39 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
40 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
41 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
43 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
44 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
45 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
46 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
47 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
48 * $NetBSD: machdep.c,v 1.74.2.1 2000/11/01 16:13:48 tv Exp $
51 * Copyright (C) 1995, 1996 Wolfgang Solfrank.
52 * Copyright (C) 1995, 1996 TooLs GmbH.
53 * All rights reserved.
55 * Redistribution and use in source and binary forms, with or without
56 * modification, are permitted provided that the following conditions
58 * 1. Redistributions of source code must retain the above copyright
59 * notice, this list of conditions and the following disclaimer.
60 * 2. Redistributions in binary form must reproduce the above copyright
61 * notice, this list of conditions and the following disclaimer in the
62 * documentation and/or other materials provided with the distribution.
63 * 3. All advertising materials mentioning features or use of this software
64 * must display the following acknowledgement:
65 * This product includes software developed by TooLs GmbH.
66 * 4. The name of TooLs GmbH may not be used to endorse or promote products
67 * derived from this software without specific prior written permission.
69 * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
70 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
71 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
72 * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
73 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
74 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
75 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
76 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
77 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
78 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
81 #include <sys/cdefs.h>
82 __FBSDID("$FreeBSD$");
84 #include "opt_compat.h"
86 #include "opt_kstack_pages.h"
87 #include "opt_platform.h"
89 #include <sys/cdefs.h>
90 #include <sys/types.h>
91 #include <sys/param.h>
93 #include <sys/systm.h>
101 #include <sys/kernel.h>
102 #include <sys/lock.h>
103 #include <sys/mutex.h>
104 #include <sys/rwlock.h>
105 #include <sys/sysctl.h>
106 #include <sys/exec.h>
108 #include <sys/syscallsubr.h>
109 #include <sys/sysproto.h>
110 #include <sys/signalvar.h>
111 #include <sys/sysent.h>
112 #include <sys/imgact.h>
113 #include <sys/msgbuf.h>
114 #include <sys/ptrace.h>
118 #include <vm/vm_page.h>
119 #include <vm/vm_object.h>
120 #include <vm/vm_pager.h>
122 #include <machine/cpu.h>
123 #include <machine/kdb.h>
124 #include <machine/reg.h>
125 #include <machine/vmparam.h>
126 #include <machine/spr.h>
127 #include <machine/hid.h>
128 #include <machine/psl.h>
129 #include <machine/trap.h>
130 #include <machine/md_var.h>
131 #include <machine/mmuvar.h>
132 #include <machine/sigframe.h>
133 #include <machine/machdep.h>
134 #include <machine/metadata.h>
135 #include <machine/platform.h>
137 #include <sys/linker.h>
138 #include <sys/reboot.h>
140 #include <contrib/libfdt/libfdt.h>
141 #include <dev/fdt/fdt_common.h>
142 #include <dev/ofw/openfirm.h>
149 #define debugf(fmt, args...) printf(fmt, ##args)
151 #define debugf(fmt, args...)
154 extern unsigned char kernel_text[];
155 extern unsigned char _etext[];
156 extern unsigned char _edata[];
157 extern unsigned char __bss_start[];
158 extern unsigned char __sbss_start[];
159 extern unsigned char __sbss_end[];
160 extern unsigned char _end[];
163 * Bootinfo is passed to us by legacy loaders. Save the address of the
164 * structure to handle backward compatibility.
168 struct kva_md_info kmi;
169 struct pcpu __pcpu[MAXCPU];
170 struct trapframe frame0;
174 char machine[] = "powerpc";
175 SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, "");
177 int cacheline_size = 32;
179 SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size,
180 CTLFLAG_RD, &cacheline_size, 0, "");
182 int hw_direct_map = 0;
184 static void cpu_booke_startup(void *);
185 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_booke_startup, NULL);
187 void print_kernel_section_addr(void);
188 void print_kenv(void);
189 u_int booke_init(uint32_t, uint32_t);
191 extern int elf32_nxstack;
194 cpu_booke_startup(void *dummy)
199 /* Initialise the decrementer-based clock. */
202 /* Good {morning,afternoon,evening,night}. */
203 cpu_setup(PCPU_GET(cpuid));
205 printf("real memory = %lu (%ld MB)\n", ptoa(physmem),
206 ptoa(physmem) / 1048576);
209 /* Display any holes after the first chunk of extended memory. */
211 printf("Physical memory chunk(s):\n");
212 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) {
213 size = phys_avail[indx + 1] - phys_avail[indx];
215 printf("0x%08x - 0x%08x, %lu bytes (%lu pages)\n",
216 phys_avail[indx], phys_avail[indx + 1] - 1,
217 size, size / PAGE_SIZE);
221 vm_ksubmap_init(&kmi);
223 printf("avail memory = %lu (%ld MB)\n", ptoa(vm_cnt.v_free_count),
224 ptoa(vm_cnt.v_free_count) / 1048576);
226 /* Set up buffers, so they can be used to read disk labels. */
228 vm_pager_bufferinit();
230 /* Cpu supports execution permissions on the pages. */
254 debugf("loader passed (static) kenv:\n");
255 if (kern_envp == NULL) {
256 debugf(" no env, null ptr\n");
259 debugf(" kern_envp = 0x%08x\n", (u_int32_t)kern_envp);
262 for (cp = kern_envp; cp != NULL; cp = kenv_next(cp))
263 debugf(" %x %s\n", (u_int32_t)cp, cp);
267 print_kernel_section_addr(void)
270 debugf("kernel image addresses:\n");
271 debugf(" kernel_text = 0x%08x\n", (uint32_t)kernel_text);
272 debugf(" _etext (sdata) = 0x%08x\n", (uint32_t)_etext);
273 debugf(" _edata = 0x%08x\n", (uint32_t)_edata);
274 debugf(" __sbss_start = 0x%08x\n", (uint32_t)__sbss_start);
275 debugf(" __sbss_end = 0x%08x\n", (uint32_t)__sbss_end);
276 debugf(" __sbss_start = 0x%08x\n", (uint32_t)__bss_start);
277 debugf(" _end = 0x%08x\n", (uint32_t)_end);
281 booke_check_for_fdt(uint32_t arg1, vm_offset_t *dtbp)
288 ptr = (void *)pmap_early_io_map(arg1, PAGE_SIZE);
289 if (fdt_check_header(ptr) != 0)
292 *dtbp = (vm_offset_t)ptr;
298 booke_init(uint32_t arg1, uint32_t arg2)
302 vm_offset_t dtbp, end;
304 vm_offset_t ksym_start;
305 vm_offset_t ksym_end;
310 end = (uintptr_t)_end;
311 dtbp = (vm_offset_t)NULL;
313 /* Set up TLB initially */
318 * Handle the various ways we can get loaded and started:
319 * - FreeBSD's loader passes the pointer to the metadata
320 * in arg1, with arg2 undefined. arg1 has a value that's
321 * relative to the kernel's link address (i.e. larger
323 * - Juniper's loader passes the metadata pointer in arg2
324 * and sets arg1 to zero. This is to signal that the
325 * loader maps the kernel and starts it at its link
326 * address (unlike the FreeBSD loader).
327 * - U-Boot passes the standard argc and argv parameters
328 * in arg1 and arg2 (resp). arg1 is between 1 and some
329 * relatively small number, such as 64K. arg2 is the
330 * physical address of the argv vector.
331 * - ePAPR loaders pass an FDT blob in r3 (arg1) and the magic hex
332 * string 0x45504150 ('ePAP') in r6 (which has been lost by now).
333 * r4 (arg2) is supposed to be set to zero, but is not always.
336 if (arg1 == 0) /* Juniper loader */
338 else if (booke_check_for_fdt(arg1, &dtbp) == 0) { /* ePAPR */
339 end = roundup(end, 8);
340 memmove((void *)end, (void *)dtbp, fdt_totalsize((void *)dtbp));
342 end += fdt_totalsize((void *)dtbp);
344 } else if (arg1 > (uintptr_t)kernel_text) /* FreeBSD loader */
350 * Parse metadata and fetch parameters.
353 preload_metadata = mdp;
354 kmdp = preload_search_by_type("elf kernel");
356 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
357 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *);
358 dtbp = MD_FETCH(kmdp, MODINFOMD_DTBP, vm_offset_t);
359 end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
361 bootinfo = (uint32_t *)preload_search_info(kmdp,
362 MODINFO_METADATA | MODINFOMD_BOOTINFO);
365 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t);
366 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t);
367 db_fetch_ksymtab(ksym_start, ksym_end);
371 bzero(__sbss_start, __sbss_end - __sbss_start);
372 bzero(__bss_start, _end - __bss_start);
375 #if defined(FDT_DTB_STATIC)
377 * In case the device tree blob was not retrieved (from metadata) try
378 * to use the statically embedded one.
380 if (dtbp == (vm_offset_t)NULL)
381 dtbp = (vm_offset_t)&fdt_static_dtb;
384 if (OF_install(OFW_FDT, 0) == FALSE)
387 if (OF_init((void *)dtbp) != 0)
390 OF_interpret("perform-fixup", 0);
392 /* Reset TLB1 to get rid of temporary mappings */
395 /* Reset Time Base */
398 /* Init params/tunables that can be overridden by the loader. */
401 /* Start initializing proc0 and thread0. */
402 proc_linkup0(&proc0, &thread0);
403 thread0.td_frame = &frame0;
405 /* Set up per-cpu data and store the pointer in SPR general 0. */
407 pcpu_init(pc, 0, sizeof(struct pcpu));
408 pc->pc_curthread = &thread0;
410 __asm __volatile("mr 13,%0" :: "r"(pc->pc_curthread));
412 __asm __volatile("mr 2,%0" :: "r"(pc->pc_curthread));
414 __asm __volatile("mtsprg 0, %0" :: "r"(pc));
416 /* Initialize system mutexes. */
419 /* Initialize the console before printing anything. */
422 /* Print out some debug info... */
423 debugf("%s: console initialized\n", __func__);
424 debugf(" arg3 mdp = 0x%08x\n", (u_int32_t)mdp);
425 debugf(" end = 0x%08x\n", (u_int32_t)end);
426 debugf(" boothowto = 0x%08x\n", boothowto);
427 debugf(" kernel ccsrbar = 0x%08x\n", CCSRBAR_VA);
428 debugf(" MSR = 0x%08x\n", mfmsr());
429 #if defined(BOOKE_E500)
430 debugf(" HID0 = 0x%08x\n", mfspr(SPR_HID0));
431 debugf(" HID1 = 0x%08x\n", mfspr(SPR_HID1));
432 debugf(" BUCSR = 0x%08x\n", mfspr(SPR_BUCSR));
435 debugf(" dtbp = 0x%08x\n", (uint32_t)dtbp);
437 print_kernel_section_addr();
439 #if defined(BOOKE_E500)
440 //tlb1_print_entries();
441 //tlb1_print_tlbentries();
447 if (boothowto & RB_KDB)
448 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
451 /* Initialise platform module */
452 platform_probe_and_attach();
454 /* Initialise virtual memory. */
455 pmap_mmu_install(MMU_TYPE_BOOKE, 0);
456 pmap_bootstrap((uintptr_t)kernel_text, end);
457 pmap_bootstrapped = 1;
458 debugf("MSR = 0x%08x\n", mfmsr());
459 #if defined(BOOKE_E500)
460 //tlb1_print_entries();
461 //tlb1_print_tlbentries();
464 /* Initialize params/tunables that are derived from memsize. */
465 init_param2(physmem);
467 /* Finish setting up thread0. */
468 thread0.td_pcb = (struct pcb *)
469 ((thread0.td_kstack + thread0.td_kstack_pages * PAGE_SIZE -
470 sizeof(struct pcb)) & ~15);
471 bzero((void *)thread0.td_pcb, sizeof(struct pcb));
472 pc->pc_curpcb = thread0.td_pcb;
474 /* Initialise the message buffer. */
475 msgbufinit(msgbufp, msgbufsize);
477 /* Enable Machine Check interrupt. */
478 mtmsr(mfmsr() | PSL_ME);
481 /* Enable L1 caches */
482 booke_enable_l1_cache();
484 debugf("%s: SP = 0x%08x\n", __func__,
485 ((uintptr_t)thread0.td_pcb - 16) & ~15);
487 return (((uintptr_t)thread0.td_pcb - 16) & ~15);
490 #define RES_GRANULE 32
491 extern uint32_t tlb0_miss_locks[];
493 /* Initialise a struct pcpu. */
495 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz)
498 pcpu->pc_tid_next = TID_MIN;
502 int words_per_gran = RES_GRANULE / sizeof(uint32_t);
504 ptr = &tlb0_miss_locks[cpuid * words_per_gran];
505 pcpu->pc_booke_tlb_lock = ptr;
507 *(ptr + 1) = 0; /* recurse counter */
512 * Flush the D-cache for non-DMA I/O so that the I-cache can
513 * be made coherent later.
516 cpu_flush_dcache(void *ptr, size_t len)
518 register_t addr, off;
521 * Align the address to a cacheline and adjust the length
522 * accordingly. Then round the length to a multiple of the
523 * cacheline for easy looping.
525 addr = (uintptr_t)ptr;
526 off = addr & (cacheline_size - 1);
528 len = (len + off + cacheline_size - 1) & ~(cacheline_size - 1);
531 __asm __volatile ("dcbf 0,%0" :: "r"(addr));
532 __asm __volatile ("sync");
533 addr += cacheline_size;
534 len -= cacheline_size;
545 if (td->td_md.md_spinlock_count == 0) {
546 msr = intr_disable();
547 td->td_md.md_spinlock_count = 1;
548 td->td_md.md_saved_msr = msr;
550 td->td_md.md_spinlock_count++;
562 msr = td->td_md.md_saved_msr;
563 td->td_md.md_spinlock_count--;
564 if (td->td_md.md_spinlock_count == 0)
568 /* Shutdown the CPU as much as possible. */
573 mtmsr(mfmsr() & ~(PSL_CE | PSL_EE | PSL_ME | PSL_DE));
579 ptrace_set_pc(struct thread *td, unsigned long addr)
581 struct trapframe *tf;
584 tf->srr0 = (register_t)addr;
590 ptrace_single_step(struct thread *td)
592 struct trapframe *tf;
596 tf->cpu.booke.dbcr0 |= (DBCR0_IDM | DBCR0_IC);
601 ptrace_clear_single_step(struct thread *td)
603 struct trapframe *tf;
607 tf->cpu.booke.dbcr0 &= ~(DBCR0_IDM | DBCR0_IC);
612 kdb_cpu_clear_singlestep(void)
616 r = mfspr(SPR_DBCR0);
617 mtspr(SPR_DBCR0, r & ~DBCR0_IC);
618 kdb_frame->srr1 &= ~PSL_DE;
622 kdb_cpu_set_singlestep(void)
626 r = mfspr(SPR_DBCR0);
627 mtspr(SPR_DBCR0, r | DBCR0_IC | DBCR0_IDM);
628 kdb_frame->srr1 |= PSL_DE;
632 bzero(void *buf, size_t len)
638 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) {
643 while (len >= sizeof(u_long) * 8) {
645 *((u_long*) p + 1) = 0;
646 *((u_long*) p + 2) = 0;
647 *((u_long*) p + 3) = 0;
648 len -= sizeof(u_long) * 8;
649 *((u_long*) p + 4) = 0;
650 *((u_long*) p + 5) = 0;
651 *((u_long*) p + 6) = 0;
652 *((u_long*) p + 7) = 0;
653 p += sizeof(u_long) * 8;
656 while (len >= sizeof(u_long)) {
658 len -= sizeof(u_long);