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 /* General setup for AIM CPUs */
182 psl_kernset = PSL_EE | PSL_ME | PSL_IR | PSL_DR | PSL_RI;
185 psl_kernset |= PSL_SF;
186 if (mfmsr() & PSL_HV)
187 psl_kernset |= PSL_HV;
189 psl_userset = psl_kernset | PSL_PR;
191 psl_userset32 = psl_userset & ~PSL_SF;
194 /* Bits that users aren't allowed to change */
195 psl_userstatic = ~(PSL_VEC | PSL_FP | PSL_FE0 | PSL_FE1);
197 * Mask bits from the SRR1 that aren't really the MSR:
198 * Bits 1-4, 10-15 (ppc32), 33-36, 42-47 (ppc64)
200 psl_userstatic &= ~0x783f0000UL;
202 /* Various very early CPU fix ups */
203 switch (mfpvr() >> 16) {
205 * PowerPC 970 CPUs have a misfeature requested by Apple that
206 * makes them pretend they have a 32-byte cacheline. Turn this
207 * off before we measure the cacheline size.
213 scratch = mfspr(SPR_HID5);
214 scratch &= ~HID5_970_DCBZ_SIZE_HI;
215 mtspr(SPR_HID5, scratch);
222 /* XXX: get from ibm,slb-size in device tree */
229 * Initialize the interrupt tables and figure out our cache line
230 * size and whether or not we need the 64-bit bridge code.
234 * Disable translation in case the vector area hasn't been
235 * mapped (G5). Note that no OFW calls can be made until
236 * translation is re-enabled.
240 mtmsr((msr & ~(PSL_IR | PSL_DR)) | PSL_RI);
243 * Measure the cacheline size using dcbz
245 * Use EXC_PGM as a playground. We are about to overwrite it
246 * anyway, we know it exists, and we know it is cache-aligned.
249 cache_check = (void *)EXC_PGM;
251 for (cacheline_size = 0; cacheline_size < 0x100; cacheline_size++)
252 cache_check[cacheline_size] = 0xff;
254 __asm __volatile("dcbz 0,%0":: "r" (cache_check) : "memory");
256 /* Find the first byte dcbz did not zero to get the cache line size */
257 for (cacheline_size = 0; cacheline_size < 0x100 &&
258 cache_check[cacheline_size] == 0; cacheline_size++);
260 /* Work around psim bug */
261 if (cacheline_size == 0) {
266 #ifndef __powerpc64__
268 * Figure out whether we need to use the 64 bit PMAP. This works by
269 * executing an instruction that is only legal on 64-bit PPC (mtmsrd),
270 * and setting ppc64 = 0 if that causes a trap.
275 bcopy(&testppc64, (void *)EXC_PGM, (size_t)&testppc64size);
276 __syncicache((void *)EXC_PGM, (size_t)&testppc64size);
284 : "=r"(scratch), "=r"(ppc64));
287 cpu_features |= PPC_FEATURE_64;
290 * Now copy restorebridge into all the handlers, if necessary,
291 * and set up the trap tables.
294 if (cpu_features & PPC_FEATURE_64) {
295 /* Patch the two instances of rfi -> rfid */
296 bcopy(&rfid_patch,&rfi_patch1,4);
298 /* rfi_patch2 is at the end of dbleave */
299 bcopy(&rfid_patch,&rfi_patch2,4);
302 #else /* powerpc64 */
303 cpu_features |= PPC_FEATURE_64;
306 trapsize = (size_t)&trapcodeend - (size_t)&trapcode;
309 * Copy generic handler into every possible trap. Special cases will get
310 * different ones in a minute.
312 for (trap = EXC_RST; trap < EXC_LAST; trap += 0x20)
313 bcopy(&trapcode, (void *)trap, trapsize);
315 #ifndef __powerpc64__
316 if (cpu_features & PPC_FEATURE_64) {
318 * Copy a code snippet to restore 32-bit bridge mode
319 * to the top of every non-generic trap handler
322 trap_offset += (size_t)&restorebridgesize;
323 bcopy(&restorebridge, (void *)EXC_RST, trap_offset);
324 bcopy(&restorebridge, (void *)EXC_DSI, trap_offset);
325 bcopy(&restorebridge, (void *)EXC_ALI, trap_offset);
326 bcopy(&restorebridge, (void *)EXC_PGM, trap_offset);
327 bcopy(&restorebridge, (void *)EXC_MCHK, trap_offset);
328 bcopy(&restorebridge, (void *)EXC_TRC, trap_offset);
329 bcopy(&restorebridge, (void *)EXC_BPT, trap_offset);
333 bcopy(&rstcode, (void *)(EXC_RST + trap_offset), (size_t)&rstcodeend -
337 bcopy(&dblow, (void *)(EXC_MCHK + trap_offset), (size_t)&dbend -
339 bcopy(&dblow, (void *)(EXC_PGM + trap_offset), (size_t)&dbend -
341 bcopy(&dblow, (void *)(EXC_TRC + trap_offset), (size_t)&dbend -
343 bcopy(&dblow, (void *)(EXC_BPT + trap_offset), (size_t)&dbend -
346 bcopy(&alitrap, (void *)(EXC_ALI + trap_offset), (size_t)&aliend -
348 bcopy(&dsitrap, (void *)(EXC_DSI + trap_offset), (size_t)&dsiend -
352 /* Set TOC base so that the interrupt code can get at it */
353 *((void **)TRAP_GENTRAP) = &generictrap;
354 *((register_t *)TRAP_TOCBASE) = toc;
356 /* Set branch address for trap code */
357 if (cpu_features & PPC_FEATURE_64)
358 *((void **)TRAP_GENTRAP) = &generictrap64;
360 *((void **)TRAP_GENTRAP) = &generictrap;
361 *((void **)TRAP_TOCBASE) = _GLOBAL_OFFSET_TABLE_;
363 /* G2-specific TLB miss helper handlers */
364 bcopy(&imisstrap, (void *)EXC_IMISS, (size_t)&imisssize);
365 bcopy(&dlmisstrap, (void *)EXC_DLMISS, (size_t)&dlmisssize);
366 bcopy(&dsmisstrap, (void *)EXC_DSMISS, (size_t)&dsmisssize);
368 __syncicache(EXC_RSVD, EXC_LAST - EXC_RSVD);
375 /* Warn if cachline size was not determined */
376 if (cacheline_warn == 1) {
377 printf("WARNING: cacheline size undetermined, setting to 32\n");
381 * Initialise virtual memory. Use BUS_PROBE_GENERIC priority
382 * in case the platform module had a better idea of what we
385 if (cpu_features & PPC_FEATURE_64)
386 pmap_mmu_install(MMU_TYPE_G5, BUS_PROBE_GENERIC);
388 pmap_mmu_install(MMU_TYPE_OEA, BUS_PROBE_GENERIC);
392 * Shutdown the CPU as much as possible.
402 ptrace_single_step(struct thread *td)
404 struct trapframe *tf;
413 ptrace_clear_single_step(struct thread *td)
415 struct trapframe *tf;
424 kdb_cpu_clear_singlestep(void)
427 kdb_frame->srr1 &= ~PSL_SE;
431 kdb_cpu_set_singlestep(void)
434 kdb_frame->srr1 |= PSL_SE;
438 * Initialise a struct pcpu.
441 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz)
444 /* Copy the SLB contents from the current CPU */
445 memcpy(pcpu->pc_aim.slb, PCPU_GET(aim.slb), sizeof(pcpu->pc_aim.slb));
449 #ifndef __powerpc64__
451 va_to_vsid(pmap_t pm, vm_offset_t va)
453 return ((pm->pm_sr[(uintptr_t)va >> ADDR_SR_SHFT]) & SR_VSID_MASK);
459 pmap_early_io_map(vm_paddr_t pa, vm_size_t size)
465 /* From p3-53 of the MPC7450 RISC Microprocessor Family Reference Manual */
467 flush_disable_caches(void)
471 register_t cache_reg;
472 volatile uint32_t *memp;
479 mtmsr(msr & ~(PSL_EE | PSL_DR));
480 msscr0 = mfspr(SPR_MSSCR0);
481 msscr0 &= ~MSSCR0_L2PFE;
482 mtspr(SPR_MSSCR0, msscr0);
485 __asm__ __volatile__("dssall; sync");
488 __asm__ __volatile__("dcbf 0,%0" :: "r"(0));
489 __asm__ __volatile__("dcbf 0,%0" :: "r"(0));
490 __asm__ __volatile__("dcbf 0,%0" :: "r"(0));
492 /* Lock the L1 Data cache. */
493 mtspr(SPR_LDSTCR, mfspr(SPR_LDSTCR) | 0xFF);
497 mtspr(SPR_LDSTCR, 0);
500 * Perform this in two stages: Flush the cache starting in RAM, then do it
503 memp = (volatile uint32_t *)0x00000000;
504 for (i = 0; i < 128 * 1024; i++) {
506 __asm__ __volatile__("dcbf 0,%0" :: "r"(memp));
507 memp += 32/sizeof(*memp);
510 memp = (volatile uint32_t *)0xfff00000;
514 mtspr(SPR_LDSTCR, x);
515 for (i = 0; i < 128; i++) {
517 __asm__ __volatile__("dcbf 0,%0" :: "r"(memp));
518 memp += 32/sizeof(*memp);
520 x = ((x << 1) | 1) & 0xff;
522 mtspr(SPR_LDSTCR, 0);
524 cache_reg = mfspr(SPR_L2CR);
525 if (cache_reg & L2CR_L2E) {
526 cache_reg &= ~(L2CR_L2IO_7450 | L2CR_L2DO_7450);
527 mtspr(SPR_L2CR, cache_reg);
529 mtspr(SPR_L2CR, cache_reg | L2CR_L2HWF);
530 while (mfspr(SPR_L2CR) & L2CR_L2HWF)
531 ; /* Busy wait for cache to flush */
533 cache_reg &= ~L2CR_L2E;
534 mtspr(SPR_L2CR, cache_reg);
536 mtspr(SPR_L2CR, cache_reg | L2CR_L2I);
538 while (mfspr(SPR_L2CR) & L2CR_L2I)
539 ; /* Busy wait for L2 cache invalidate */
543 cache_reg = mfspr(SPR_L3CR);
544 if (cache_reg & L3CR_L3E) {
545 cache_reg &= ~(L3CR_L3IO | L3CR_L3DO);
546 mtspr(SPR_L3CR, cache_reg);
548 mtspr(SPR_L3CR, cache_reg | L3CR_L3HWF);
549 while (mfspr(SPR_L3CR) & L3CR_L3HWF)
550 ; /* Busy wait for cache to flush */
552 cache_reg &= ~L3CR_L3E;
553 mtspr(SPR_L3CR, cache_reg);
555 mtspr(SPR_L3CR, cache_reg | L3CR_L3I);
557 while (mfspr(SPR_L3CR) & L3CR_L3I)
558 ; /* Busy wait for L3 cache invalidate */
562 mtspr(SPR_HID0, mfspr(SPR_HID0) & ~HID0_DCE);
572 static u_quad_t timebase = 0;
573 static register_t sprgs[4];
574 static register_t srrs[2];
577 struct thread *fputd;
578 struct thread *vectd;
581 register_t saved_msr;
585 PCPU_SET(restore, &resetjb);
588 fputd = PCPU_GET(fputhread);
589 vectd = PCPU_GET(vecthread);
594 if (setjmp(resetjb) == 0) {
595 sprgs[0] = mfspr(SPR_SPRG0);
596 sprgs[1] = mfspr(SPR_SPRG1);
597 sprgs[2] = mfspr(SPR_SPRG2);
598 sprgs[3] = mfspr(SPR_SPRG3);
599 srrs[0] = mfspr(SPR_SRR0);
600 srrs[1] = mfspr(SPR_SRR1);
603 flush_disable_caches();
604 hid0 = mfspr(SPR_HID0);
605 hid0 = (hid0 & ~(HID0_DOZE | HID0_NAP)) | HID0_SLEEP;
608 msr = mfmsr() | PSL_POW;
609 mtspr(SPR_HID0, hid0);
615 platform_smp_timebase_sync(timebase, 0);
616 PCPU_SET(curthread, curthread);
617 PCPU_SET(curpcb, curthread->td_pcb);
618 pmap_activate(curthread);
620 mtspr(SPR_SPRG0, sprgs[0]);
621 mtspr(SPR_SPRG1, sprgs[1]);
622 mtspr(SPR_SPRG2, sprgs[2]);
623 mtspr(SPR_SPRG3, sprgs[3]);
624 mtspr(SPR_SRR0, srrs[0]);
625 mtspr(SPR_SRR1, srrs[1]);
627 if (fputd == curthread)
628 enable_fpu(curthread);
629 if (vectd == curthread)
630 enable_vec(curthread);