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("$FreeBSD$");
61 #include "opt_kstack_pages.h"
62 #include "opt_platform.h"
64 #include <sys/endian.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/sigframe.h>
122 #include <machine/spr.h>
123 #include <machine/trap.h>
124 #include <machine/vmparam.h>
125 #include <machine/ofw_machdep.h>
129 #include <dev/ofw/openfirm.h>
132 #include "mmu_oea64.h"
135 #ifndef __powerpc64__
136 struct bat battable[16];
141 #ifndef __powerpc64__
142 /* Bits for running on 64-bit systems in 32-bit mode. */
143 extern void *testppc64, *testppc64size;
144 extern void *restorebridge, *restorebridgesize;
145 extern void *rfid_patch, *rfi_patch1, *rfi_patch2;
146 extern void *trapcode64;
148 extern Elf_Addr _GLOBAL_OFFSET_TABLE_[];
151 extern void *rstcode, *rstcodeend;
152 extern void *trapcode, *trapcodeend;
153 extern void *hypertrapcode, *hypertrapcodeend;
154 extern void *generictrap, *generictrap64;
155 extern void *alitrap, *aliend;
156 extern void *dsitrap, *dsiend;
157 extern void *decrint, *decrsize;
158 extern void *extint, *extsize;
159 extern void *dblow, *dbend;
160 extern void *imisstrap, *imisssize;
161 extern void *dlmisstrap, *dlmisssize;
162 extern void *dsmisstrap, *dsmisssize;
164 extern void *ap_pcpu;
165 extern void __restartkernel(vm_offset_t, vm_offset_t, vm_offset_t, void *, uint32_t, register_t offset, register_t msr);
166 extern void __restartkernel_virtual(vm_offset_t, vm_offset_t, vm_offset_t, void *, uint32_t, register_t offset, register_t msr);
168 void aim_early_init(vm_offset_t fdt, vm_offset_t toc, vm_offset_t ofentry,
169 void *mdp, uint32_t mdp_cookie);
170 void aim_cpu_init(vm_offset_t toc);
173 aim_early_init(vm_offset_t fdt, vm_offset_t toc, vm_offset_t ofentry, void *mdp,
179 * If running from an FDT, make sure we are in real mode to avoid
180 * tromping on firmware page tables. Everything in the kernel assumes
181 * 1:1 mappings out of firmware, so this won't break anything not
182 * already broken. This doesn't work if there is live OF, since OF
183 * may internally use non-1:1 mappings.
186 mtmsr(mfmsr() & ~(PSL_IR | PSL_DR));
190 * Relocate to high memory so that the kernel
191 * can execute from the direct map.
193 * If we are in virtual mode already, use a special entry point
194 * that sets up a temporary DMAP to execute from until we can
195 * properly set up the MMU.
197 if ((vm_offset_t)&aim_early_init < DMAP_BASE_ADDRESS) {
198 if (mfmsr() & PSL_DR) {
199 __restartkernel_virtual(fdt, 0, ofentry, mdp,
200 mdp_cookie, DMAP_BASE_ADDRESS, mfmsr());
202 __restartkernel(fdt, 0, ofentry, mdp, mdp_cookie,
203 DMAP_BASE_ADDRESS, mfmsr());
208 /* Various very early CPU fix ups */
209 switch (mfpvr() >> 16) {
211 * PowerPC 970 CPUs have a misfeature requested by Apple that
212 * makes them pretend they have a 32-byte cacheline. Turn this
213 * off before we measure the cacheline size.
219 scratch = mfspr(SPR_HID5);
220 scratch &= ~HID5_970_DCBZ_SIZE_HI;
221 mtspr(SPR_HID5, scratch);
230 /* XXX: get from ibm,slb-size in device tree */
238 aim_cpu_init(vm_offset_t toc)
240 size_t trap_offset, trapsize;
243 uint8_t *cache_check;
245 #ifndef __powerpc64__
253 /* General setup for AIM CPUs */
254 psl_kernset = PSL_EE | PSL_ME | PSL_IR | PSL_DR | PSL_RI;
257 psl_kernset |= PSL_SF;
258 if (mfmsr() & PSL_HV)
259 psl_kernset |= PSL_HV;
261 #if BYTE_ORDER == LITTLE_ENDIAN
262 psl_kernset |= PSL_LE;
266 psl_userset = psl_kernset | PSL_PR;
268 psl_userset32 = psl_userset & ~PSL_SF;
272 * Zeroed bits in this variable signify that the value of the bit
273 * in its position is allowed to vary between userspace contexts.
275 * All other bits are required to be identical for every userspace
276 * context. The actual *value* of the bit is determined by
277 * psl_userset and/or psl_userset32, and is not allowed to change.
279 * Remember to update this set when implementing support for
280 * *conditionally* enabling a processor facility. Failing to do
281 * this will cause swapcontext() in userspace to break when a
282 * process uses a conditionally-enabled facility.
284 * When *unconditionally* implementing support for a processor
285 * facility, update psl_userset / psl_userset32 instead.
287 * See the access control check in set_mcontext().
289 psl_userstatic = ~(PSL_VSX | PSL_VEC | PSL_FP | PSL_FE0 | PSL_FE1);
291 * Mask bits from the SRR1 that aren't really the MSR:
292 * Bits 1-4, 10-15 (ppc32), 33-36, 42-47 (ppc64)
294 psl_userstatic &= ~0x783f0000UL;
297 * Initialize the interrupt tables and figure out our cache line
298 * size and whether or not we need the 64-bit bridge code.
302 * Disable translation in case the vector area hasn't been
303 * mapped (G5). Note that no OFW calls can be made until
304 * translation is re-enabled.
308 mtmsr((msr & ~(PSL_IR | PSL_DR)) | PSL_RI);
311 * Measure the cacheline size using dcbz
313 * Use EXC_PGM as a playground. We are about to overwrite it
314 * anyway, we know it exists, and we know it is cache-aligned.
317 cache_check = (void *)EXC_PGM;
319 for (cacheline_size = 0; cacheline_size < 0x100; cacheline_size++)
320 cache_check[cacheline_size] = 0xff;
322 __asm __volatile("dcbz 0,%0":: "r" (cache_check) : "memory");
324 /* Find the first byte dcbz did not zero to get the cache line size */
325 for (cacheline_size = 0; cacheline_size < 0x100 &&
326 cache_check[cacheline_size] == 0; cacheline_size++);
328 /* Work around psim bug */
329 if (cacheline_size == 0) {
334 #ifndef __powerpc64__
336 * Figure out whether we need to use the 64 bit PMAP. This works by
337 * executing an instruction that is only legal on 64-bit PPC (mtmsrd),
338 * and setting ppc64 = 0 if that causes a trap.
343 bcopy(&testppc64, (void *)EXC_PGM, (size_t)&testppc64size);
344 __syncicache((void *)EXC_PGM, (size_t)&testppc64size);
352 : "=r"(scratch), "=r"(ppc64));
355 cpu_features |= PPC_FEATURE_64;
358 * Now copy restorebridge into all the handlers, if necessary,
359 * and set up the trap tables.
362 if (cpu_features & PPC_FEATURE_64) {
363 /* Patch the two instances of rfi -> rfid */
364 bcopy(&rfid_patch,&rfi_patch1,4);
366 /* rfi_patch2 is at the end of dbleave */
367 bcopy(&rfid_patch,&rfi_patch2,4);
370 #else /* powerpc64 */
371 cpu_features |= PPC_FEATURE_64;
374 trapsize = (size_t)&trapcodeend - (size_t)&trapcode;
377 * Copy generic handler into every possible trap. Special cases will get
378 * different ones in a minute.
380 for (trap = EXC_RST; trap < EXC_LAST; trap += 0x20)
381 bcopy(&trapcode, (void *)trap, trapsize);
383 #ifndef __powerpc64__
384 if (cpu_features & PPC_FEATURE_64) {
386 * Copy a code snippet to restore 32-bit bridge mode
387 * to the top of every non-generic trap handler
390 trap_offset += (size_t)&restorebridgesize;
391 bcopy(&restorebridge, (void *)EXC_RST, trap_offset);
392 bcopy(&restorebridge, (void *)EXC_DSI, trap_offset);
393 bcopy(&restorebridge, (void *)EXC_ALI, trap_offset);
394 bcopy(&restorebridge, (void *)EXC_PGM, trap_offset);
395 bcopy(&restorebridge, (void *)EXC_MCHK, trap_offset);
396 bcopy(&restorebridge, (void *)EXC_TRC, trap_offset);
397 bcopy(&restorebridge, (void *)EXC_BPT, trap_offset);
400 * Use an IBAT and a DBAT to map the bottom 256M segment.
402 * It is very important to do it *now* to avoid taking a
403 * fault in .text / .data before the MMU is bootstrapped,
404 * because until then, the translation data has not been
405 * copied over from OpenFirmware, so our DSI/ISI will fail
409 battable[0x0].batl = BATL(0x00000000, BAT_M, BAT_PP_RW);
410 battable[0x0].batu = BATU(0x00000000, BAT_BL_256M, BAT_Vs);
412 __asm (".balign 32; \n"
413 "mtibatu 0,%0; mtibatl 0,%1; isync; \n"
414 "mtdbatu 0,%0; mtdbatl 0,%1; isync"
415 :: "r"(battable[0].batu), "r"(battable[0].batl));
418 trapsize = (size_t)&hypertrapcodeend - (size_t)&hypertrapcode;
419 bcopy(&hypertrapcode, (void *)(EXC_HEA + trap_offset), trapsize);
420 bcopy(&hypertrapcode, (void *)(EXC_HMI + trap_offset), trapsize);
421 bcopy(&hypertrapcode, (void *)(EXC_HVI + trap_offset), trapsize);
422 bcopy(&hypertrapcode, (void *)(EXC_SOFT_PATCH + trap_offset), trapsize);
425 bcopy(&rstcode, (void *)(EXC_RST + trap_offset), (size_t)&rstcodeend -
429 bcopy(&dblow, (void *)(EXC_MCHK + trap_offset), (size_t)&dbend -
431 bcopy(&dblow, (void *)(EXC_PGM + trap_offset), (size_t)&dbend -
433 bcopy(&dblow, (void *)(EXC_TRC + trap_offset), (size_t)&dbend -
435 bcopy(&dblow, (void *)(EXC_BPT + trap_offset), (size_t)&dbend -
438 bcopy(&alitrap, (void *)(EXC_ALI + trap_offset), (size_t)&aliend -
440 bcopy(&dsitrap, (void *)(EXC_DSI + trap_offset), (size_t)&dsiend -
443 /* Set address of generictrap for self-reloc calculations */
444 *((void **)TRAP_GENTRAP) = &generictrap;
446 /* Set TOC base so that the interrupt code can get at it */
447 *((void **)TRAP_ENTRY) = &generictrap;
448 *((register_t *)TRAP_TOCBASE) = toc;
450 /* Set branch address for trap code */
451 if (cpu_features & PPC_FEATURE_64)
452 *((void **)TRAP_ENTRY) = &generictrap64;
454 *((void **)TRAP_ENTRY) = &generictrap;
455 *((void **)TRAP_TOCBASE) = _GLOBAL_OFFSET_TABLE_;
457 /* G2-specific TLB miss helper handlers */
458 bcopy(&imisstrap, (void *)EXC_IMISS, (size_t)&imisssize);
459 bcopy(&dlmisstrap, (void *)EXC_DLMISS, (size_t)&dlmisssize);
460 bcopy(&dsmisstrap, (void *)EXC_DSMISS, (size_t)&dsmisssize);
462 __syncicache(EXC_RSVD, EXC_LAST - EXC_RSVD);
469 /* Warn if cachline size was not determined */
470 if (cacheline_warn == 1) {
471 printf("WARNING: cacheline size undetermined, setting to 32\n");
475 * Initialise virtual memory. Use BUS_PROBE_GENERIC priority
476 * in case the platform module had a better idea of what we
480 pmap_mmu_install(MMU_TYPE_RADIX, BUS_PROBE_GENERIC);
481 else if (cpu_features & PPC_FEATURE_64)
482 pmap_mmu_install(MMU_TYPE_G5, BUS_PROBE_GENERIC);
484 pmap_mmu_install(MMU_TYPE_OEA, BUS_PROBE_GENERIC);
488 * Shutdown the CPU as much as possible.
498 ptrace_single_step(struct thread *td)
500 struct trapframe *tf;
509 ptrace_clear_single_step(struct thread *td)
511 struct trapframe *tf;
520 kdb_cpu_clear_singlestep(void)
523 kdb_frame->srr1 &= ~PSL_SE;
527 kdb_cpu_set_singlestep(void)
530 kdb_frame->srr1 |= PSL_SE;
534 * Initialise a struct pcpu.
537 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz)
540 /* Copy the SLB contents from the current CPU */
541 memcpy(pcpu->pc_aim.slb, PCPU_GET(aim.slb), sizeof(pcpu->pc_aim.slb));
545 /* Return 0 on handled success, otherwise signal number. */
547 cpu_machine_check(struct thread *td, struct trapframe *frame, int *ucode)
551 * This block is 64-bit CPU specific currently. Punt running in 32-bit
552 * mode on 64-bit CPUs.
554 /* Check if the important information is in DSISR */
555 if ((frame->srr1 & SRR1_MCHK_DATA) != 0) {
556 printf("Machine check, DSISR: %016lx\n", frame->cpu.aim.dsisr);
557 /* SLB multi-hit is recoverable. */
558 if ((frame->cpu.aim.dsisr & DSISR_MC_SLB_MULTIHIT) != 0)
560 if ((frame->cpu.aim.dsisr &
561 (DSISR_MC_DERAT_MULTIHIT | DSISR_MC_TLB_MULTIHIT)) != 0) {
565 /* TODO: Add other machine check recovery procedures. */
567 if ((frame->srr1 & SRR1_MCHK_IFETCH_M) == SRR1_MCHK_IFETCH_SLBMH)
575 #ifndef __powerpc64__
577 va_to_vsid(pmap_t pm, vm_offset_t va)
579 return ((pm->pm_sr[(uintptr_t)va >> ADDR_SR_SHFT]) & SR_VSID_MASK);
585 pmap_early_io_map_init(void)
587 if ((cpu_features2 & PPC_FEATURE2_ARCH_3_00) == 0)
591 TUNABLE_INT_FETCH("radix_mmu", &radix_mmu);
595 * When using Radix, set the start and end of kva early, to be able to
596 * use KVAs on pmap_early_io_map and avoid issues when remapping them
600 virtual_avail = VM_MIN_KERNEL_ADDRESS;
601 virtual_end = VM_MAX_SAFE_KERNEL_ADDRESS;
606 * These functions need to provide addresses that both (a) work in real mode
607 * (or whatever mode/circumstances the kernel is in in early boot (now)) and
608 * (b) can still, in principle, work once the kernel is going. Because these
609 * rely on existing mappings/real mode, unmap is a no-op.
612 pmap_early_io_map(vm_paddr_t pa, vm_size_t size)
614 KASSERT(!pmap_bootstrapped, ("Not available after PMAP started!"));
617 * If we have the MMU up in early boot, assume it is 1:1. Otherwise,
618 * try to get the address in a memory region compatible with the
619 * direct map for efficiency later.
620 * Except for Radix MMU, for which current implementation doesn't
621 * support mapping arbitrary virtual addresses, such as the ones
622 * generated by "direct mapping" I/O addresses. In this case, use
623 * addresses from KVA area.
625 if (mfmsr() & PSL_DR)
627 else if (radix_mmu) {
631 virtual_avail += round_page(size + pa - trunc_page(pa));
634 return (DMAP_BASE_ADDRESS + pa);
638 pmap_early_io_unmap(vm_offset_t va, vm_size_t size)
641 KASSERT(!pmap_bootstrapped, ("Not available after PMAP started!"));
644 /* From p3-53 of the MPC7450 RISC Microprocessor Family Reference Manual */
646 flush_disable_caches(void)
650 register_t cache_reg;
651 volatile uint32_t *memp;
657 mtmsr(msr & ~(PSL_EE | PSL_DR));
658 msscr0 = mfspr(SPR_MSSCR0);
659 msscr0 &= ~MSSCR0_L2PFE;
660 mtspr(SPR_MSSCR0, msscr0);
663 /* 7e00066c: dssall */
664 __asm__ __volatile__(".long 0x7e00066c; sync");
667 __asm__ __volatile__("dcbf 0,%0" :: "r"(0));
668 __asm__ __volatile__("dcbf 0,%0" :: "r"(0));
669 __asm__ __volatile__("dcbf 0,%0" :: "r"(0));
671 /* Lock the L1 Data cache. */
672 mtspr(SPR_LDSTCR, mfspr(SPR_LDSTCR) | 0xFF);
676 mtspr(SPR_LDSTCR, 0);
679 * Perform this in two stages: Flush the cache starting in RAM, then do it
682 memp = (volatile uint32_t *)0x00000000;
683 for (i = 0; i < 128 * 1024; i++) {
685 __asm__ __volatile__("dcbf 0,%0" :: "r"(memp));
686 memp += 32/sizeof(*memp);
689 memp = (volatile uint32_t *)0xfff00000;
693 mtspr(SPR_LDSTCR, x);
694 for (i = 0; i < 128; i++) {
696 __asm__ __volatile__("dcbf 0,%0" :: "r"(memp));
697 memp += 32/sizeof(*memp);
699 x = ((x << 1) | 1) & 0xff;
701 mtspr(SPR_LDSTCR, 0);
703 cache_reg = mfspr(SPR_L2CR);
704 if (cache_reg & L2CR_L2E) {
705 cache_reg &= ~(L2CR_L2IO_7450 | L2CR_L2DO_7450);
706 mtspr(SPR_L2CR, cache_reg);
708 mtspr(SPR_L2CR, cache_reg | L2CR_L2HWF);
709 while (mfspr(SPR_L2CR) & L2CR_L2HWF)
710 ; /* Busy wait for cache to flush */
712 cache_reg &= ~L2CR_L2E;
713 mtspr(SPR_L2CR, cache_reg);
715 mtspr(SPR_L2CR, cache_reg | L2CR_L2I);
717 while (mfspr(SPR_L2CR) & L2CR_L2I)
718 ; /* Busy wait for L2 cache invalidate */
722 cache_reg = mfspr(SPR_L3CR);
723 if (cache_reg & L3CR_L3E) {
724 cache_reg &= ~(L3CR_L3IO | L3CR_L3DO);
725 mtspr(SPR_L3CR, cache_reg);
727 mtspr(SPR_L3CR, cache_reg | L3CR_L3HWF);
728 while (mfspr(SPR_L3CR) & L3CR_L3HWF)
729 ; /* Busy wait for cache to flush */
731 cache_reg &= ~L3CR_L3E;
732 mtspr(SPR_L3CR, cache_reg);
734 mtspr(SPR_L3CR, cache_reg | L3CR_L3I);
736 while (mfspr(SPR_L3CR) & L3CR_L3I)
737 ; /* Busy wait for L3 cache invalidate */
741 mtspr(SPR_HID0, mfspr(SPR_HID0) & ~HID0_DCE);
748 #ifndef __powerpc64__
752 static u_quad_t timebase = 0;
753 static register_t sprgs[4];
754 static register_t srrs[2];
757 struct thread *fputd;
758 struct thread *vectd;
761 register_t saved_msr;
765 PCPU_SET(restore, &resetjb);
768 fputd = PCPU_GET(fputhread);
769 vectd = PCPU_GET(vecthread);
774 if (setjmp(resetjb) == 0) {
775 sprgs[0] = mfspr(SPR_SPRG0);
776 sprgs[1] = mfspr(SPR_SPRG1);
777 sprgs[2] = mfspr(SPR_SPRG2);
778 sprgs[3] = mfspr(SPR_SPRG3);
779 srrs[0] = mfspr(SPR_SRR0);
780 srrs[1] = mfspr(SPR_SRR1);
783 flush_disable_caches();
784 hid0 = mfspr(SPR_HID0);
785 hid0 = (hid0 & ~(HID0_DOZE | HID0_NAP)) | HID0_SLEEP;
788 msr = mfmsr() | PSL_POW;
789 mtspr(SPR_HID0, hid0);
795 /* XXX: The mttb() means this *only* works on single-CPU systems. */
797 PCPU_SET(curthread, curthread);
798 PCPU_SET(curpcb, curthread->td_pcb);
799 pmap_activate(curthread);
801 mtspr(SPR_SPRG0, sprgs[0]);
802 mtspr(SPR_SPRG1, sprgs[1]);
803 mtspr(SPR_SPRG2, sprgs[2]);
804 mtspr(SPR_SPRG3, sprgs[3]);
805 mtspr(SPR_SRR0, srrs[0]);
806 mtspr(SPR_SRR1, srrs[1]);
808 if (fputd == curthread)
809 enable_fpu(curthread);
810 if (vectd == curthread)
811 enable_vec(curthread);