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>
133 #include "mmu_oea64.h"
136 #ifndef __powerpc64__
137 struct bat battable[16];
140 #ifndef __powerpc64__
141 /* Bits for running on 64-bit systems in 32-bit mode. */
142 extern void *testppc64, *testppc64size;
143 extern void *restorebridge, *restorebridgesize;
144 extern void *rfid_patch, *rfi_patch1, *rfi_patch2;
145 extern void *trapcode64;
147 extern Elf_Addr _GLOBAL_OFFSET_TABLE_[];
150 extern void *rstcode, *rstcodeend;
151 extern void *trapcode, *trapcodeend;
152 extern void *generictrap, *generictrap64;
153 extern void *alitrap, *aliend;
154 extern void *dsitrap, *dsiend;
155 extern void *decrint, *decrsize;
156 extern void *extint, *extsize;
157 extern void *dblow, *dbend;
158 extern void *imisstrap, *imisssize;
159 extern void *dlmisstrap, *dlmisssize;
160 extern void *dsmisstrap, *dsmisssize;
162 extern void *ap_pcpu;
164 void aim_cpu_init(vm_offset_t toc);
167 aim_cpu_init(vm_offset_t toc)
169 size_t trap_offset, trapsize;
171 register_t msr, scratch;
172 uint8_t *cache_check;
174 #ifndef __powerpc64__
181 /* Various very early CPU fix ups */
182 switch (mfpvr() >> 16) {
184 * PowerPC 970 CPUs have a misfeature requested by Apple that
185 * makes them pretend they have a 32-byte cacheline. Turn this
186 * off before we measure the cacheline size.
192 scratch = mfspr(SPR_HID5);
193 scratch &= ~HID5_970_DCBZ_SIZE_HI;
194 mtspr(SPR_HID5, scratch);
201 /* XXX: get from ibm,slb-size in device tree */
208 * Initialize the interrupt tables and figure out our cache line
209 * size and whether or not we need the 64-bit bridge code.
213 * Disable translation in case the vector area hasn't been
214 * mapped (G5). Note that no OFW calls can be made until
215 * translation is re-enabled.
219 mtmsr((msr & ~(PSL_IR | PSL_DR)) | PSL_RI);
222 * Measure the cacheline size using dcbz
224 * Use EXC_PGM as a playground. We are about to overwrite it
225 * anyway, we know it exists, and we know it is cache-aligned.
228 cache_check = (void *)EXC_PGM;
230 for (cacheline_size = 0; cacheline_size < 0x100; cacheline_size++)
231 cache_check[cacheline_size] = 0xff;
233 __asm __volatile("dcbz 0,%0":: "r" (cache_check) : "memory");
235 /* Find the first byte dcbz did not zero to get the cache line size */
236 for (cacheline_size = 0; cacheline_size < 0x100 &&
237 cache_check[cacheline_size] == 0; cacheline_size++);
239 /* Work around psim bug */
240 if (cacheline_size == 0) {
245 #ifndef __powerpc64__
247 * Figure out whether we need to use the 64 bit PMAP. This works by
248 * executing an instruction that is only legal on 64-bit PPC (mtmsrd),
249 * and setting ppc64 = 0 if that causes a trap.
254 bcopy(&testppc64, (void *)EXC_PGM, (size_t)&testppc64size);
255 __syncicache((void *)EXC_PGM, (size_t)&testppc64size);
263 : "=r"(scratch), "=r"(ppc64));
266 cpu_features |= PPC_FEATURE_64;
269 * Now copy restorebridge into all the handlers, if necessary,
270 * and set up the trap tables.
273 if (cpu_features & PPC_FEATURE_64) {
274 /* Patch the two instances of rfi -> rfid */
275 bcopy(&rfid_patch,&rfi_patch1,4);
277 /* rfi_patch2 is at the end of dbleave */
278 bcopy(&rfid_patch,&rfi_patch2,4);
281 #else /* powerpc64 */
282 cpu_features |= PPC_FEATURE_64;
285 trapsize = (size_t)&trapcodeend - (size_t)&trapcode;
288 * Copy generic handler into every possible trap. Special cases will get
289 * different ones in a minute.
291 for (trap = EXC_RST; trap < EXC_LAST; trap += 0x20)
292 bcopy(&trapcode, (void *)trap, trapsize);
294 #ifndef __powerpc64__
295 if (cpu_features & PPC_FEATURE_64) {
297 * Copy a code snippet to restore 32-bit bridge mode
298 * to the top of every non-generic trap handler
301 trap_offset += (size_t)&restorebridgesize;
302 bcopy(&restorebridge, (void *)EXC_RST, trap_offset);
303 bcopy(&restorebridge, (void *)EXC_DSI, trap_offset);
304 bcopy(&restorebridge, (void *)EXC_ALI, trap_offset);
305 bcopy(&restorebridge, (void *)EXC_PGM, trap_offset);
306 bcopy(&restorebridge, (void *)EXC_MCHK, trap_offset);
307 bcopy(&restorebridge, (void *)EXC_TRC, trap_offset);
308 bcopy(&restorebridge, (void *)EXC_BPT, trap_offset);
312 bcopy(&rstcode, (void *)(EXC_RST + trap_offset), (size_t)&rstcodeend -
316 bcopy(&dblow, (void *)(EXC_MCHK + trap_offset), (size_t)&dbend -
318 bcopy(&dblow, (void *)(EXC_PGM + trap_offset), (size_t)&dbend -
320 bcopy(&dblow, (void *)(EXC_TRC + trap_offset), (size_t)&dbend -
322 bcopy(&dblow, (void *)(EXC_BPT + trap_offset), (size_t)&dbend -
325 bcopy(&alitrap, (void *)(EXC_ALI + trap_offset), (size_t)&aliend -
327 bcopy(&dsitrap, (void *)(EXC_DSI + trap_offset), (size_t)&dsiend -
331 /* Set TOC base so that the interrupt code can get at it */
332 *((void **)TRAP_GENTRAP) = &generictrap;
333 *((register_t *)TRAP_TOCBASE) = toc;
335 /* Set branch address for trap code */
336 if (cpu_features & PPC_FEATURE_64)
337 *((void **)TRAP_GENTRAP) = &generictrap64;
339 *((void **)TRAP_GENTRAP) = &generictrap;
340 *((void **)TRAP_TOCBASE) = _GLOBAL_OFFSET_TABLE_;
342 /* G2-specific TLB miss helper handlers */
343 bcopy(&imisstrap, (void *)EXC_IMISS, (size_t)&imisssize);
344 bcopy(&dlmisstrap, (void *)EXC_DLMISS, (size_t)&dlmisssize);
345 bcopy(&dsmisstrap, (void *)EXC_DSMISS, (size_t)&dsmisssize);
347 __syncicache(EXC_RSVD, EXC_LAST - EXC_RSVD);
354 /* Warn if cachline size was not determined */
355 if (cacheline_warn == 1) {
356 printf("WARNING: cacheline size undetermined, setting to 32\n");
360 * Initialise virtual memory. Use BUS_PROBE_GENERIC priority
361 * in case the platform module had a better idea of what we
364 if (cpu_features & PPC_FEATURE_64)
365 pmap_mmu_install(MMU_TYPE_G5, BUS_PROBE_GENERIC);
367 pmap_mmu_install(MMU_TYPE_OEA, BUS_PROBE_GENERIC);
371 * Shutdown the CPU as much as possible.
381 ptrace_single_step(struct thread *td)
383 struct trapframe *tf;
392 ptrace_clear_single_step(struct thread *td)
394 struct trapframe *tf;
403 kdb_cpu_clear_singlestep(void)
406 kdb_frame->srr1 &= ~PSL_SE;
410 kdb_cpu_set_singlestep(void)
413 kdb_frame->srr1 |= PSL_SE;
417 * Initialise a struct pcpu.
420 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz)
423 /* Copy the SLB contents from the current CPU */
424 memcpy(pcpu->pc_slb, PCPU_GET(slb), sizeof(pcpu->pc_slb));
428 #ifndef __powerpc64__
430 va_to_vsid(pmap_t pm, vm_offset_t va)
432 return ((pm->pm_sr[(uintptr_t)va >> ADDR_SR_SHFT]) & SR_VSID_MASK);
438 pmap_early_io_map(vm_paddr_t pa, vm_size_t size)
444 /* From p3-53 of the MPC7450 RISC Microprocessor Family Reference Manual */
446 flush_disable_caches(void)
450 register_t cache_reg;
451 volatile uint32_t *memp;
458 mtmsr(msr & ~(PSL_EE | PSL_DR));
459 msscr0 = mfspr(SPR_MSSCR0);
460 msscr0 &= ~MSSCR0_L2PFE;
461 mtspr(SPR_MSSCR0, msscr0);
464 __asm__ __volatile__("dssall; sync");
467 __asm__ __volatile__("dcbf 0,%0" :: "r"(0));
468 __asm__ __volatile__("dcbf 0,%0" :: "r"(0));
469 __asm__ __volatile__("dcbf 0,%0" :: "r"(0));
471 /* Lock the L1 Data cache. */
472 mtspr(SPR_LDSTCR, mfspr(SPR_LDSTCR) | 0xFF);
476 mtspr(SPR_LDSTCR, 0);
479 * Perform this in two stages: Flush the cache starting in RAM, then do it
482 memp = (volatile uint32_t *)0x00000000;
483 for (i = 0; i < 128 * 1024; i++) {
485 __asm__ __volatile__("dcbf 0,%0" :: "r"(memp));
486 memp += 32/sizeof(*memp);
489 memp = (volatile uint32_t *)0xfff00000;
493 mtspr(SPR_LDSTCR, x);
494 for (i = 0; i < 128; i++) {
496 __asm__ __volatile__("dcbf 0,%0" :: "r"(memp));
497 memp += 32/sizeof(*memp);
499 x = ((x << 1) | 1) & 0xff;
501 mtspr(SPR_LDSTCR, 0);
503 cache_reg = mfspr(SPR_L2CR);
504 if (cache_reg & L2CR_L2E) {
505 cache_reg &= ~(L2CR_L2IO_7450 | L2CR_L2DO_7450);
506 mtspr(SPR_L2CR, cache_reg);
508 mtspr(SPR_L2CR, cache_reg | L2CR_L2HWF);
509 while (mfspr(SPR_L2CR) & L2CR_L2HWF)
510 ; /* Busy wait for cache to flush */
512 cache_reg &= ~L2CR_L2E;
513 mtspr(SPR_L2CR, cache_reg);
515 mtspr(SPR_L2CR, cache_reg | L2CR_L2I);
517 while (mfspr(SPR_L2CR) & L2CR_L2I)
518 ; /* Busy wait for L2 cache invalidate */
522 cache_reg = mfspr(SPR_L3CR);
523 if (cache_reg & L3CR_L3E) {
524 cache_reg &= ~(L3CR_L3IO | L3CR_L3DO);
525 mtspr(SPR_L3CR, cache_reg);
527 mtspr(SPR_L3CR, cache_reg | L3CR_L3HWF);
528 while (mfspr(SPR_L3CR) & L3CR_L3HWF)
529 ; /* Busy wait for cache to flush */
531 cache_reg &= ~L3CR_L3E;
532 mtspr(SPR_L3CR, cache_reg);
534 mtspr(SPR_L3CR, cache_reg | L3CR_L3I);
536 while (mfspr(SPR_L3CR) & L3CR_L3I)
537 ; /* Busy wait for L3 cache invalidate */
541 mtspr(SPR_HID0, mfspr(SPR_HID0) & ~HID0_DCE);
551 static u_quad_t timebase = 0;
552 static register_t sprgs[4];
553 static register_t srrs[2];
556 struct thread *fputd;
557 struct thread *vectd;
560 register_t saved_msr;
564 PCPU_SET(restore, &resetjb);
567 fputd = PCPU_GET(fputhread);
568 vectd = PCPU_GET(vecthread);
573 if (setjmp(resetjb) == 0) {
574 sprgs[0] = mfspr(SPR_SPRG0);
575 sprgs[1] = mfspr(SPR_SPRG1);
576 sprgs[2] = mfspr(SPR_SPRG2);
577 sprgs[3] = mfspr(SPR_SPRG3);
578 srrs[0] = mfspr(SPR_SRR0);
579 srrs[1] = mfspr(SPR_SRR1);
582 flush_disable_caches();
583 hid0 = mfspr(SPR_HID0);
584 hid0 = (hid0 & ~(HID0_DOZE | HID0_NAP)) | HID0_SLEEP;
587 msr = mfmsr() | PSL_POW;
588 mtspr(SPR_HID0, hid0);
594 platform_smp_timebase_sync(timebase, 0);
595 PCPU_SET(curthread, curthread);
596 PCPU_SET(curpcb, curthread->td_pcb);
597 pmap_activate(curthread);
599 mtspr(SPR_SPRG0, sprgs[0]);
600 mtspr(SPR_SPRG1, sprgs[1]);
601 mtspr(SPR_SPRG2, sprgs[2]);
602 mtspr(SPR_SPRG3, sprgs[3]);
603 mtspr(SPR_SRR0, srrs[0]);
604 mtspr(SPR_SRR1, srrs[1]);
606 if (fputd == curthread)
607 enable_fpu(curthread);
608 if (vectd == curthread)
609 enable_vec(curthread);