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_msgbuf.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/signalvar.h>
88 #include <sys/sysctl.h>
89 #include <sys/sysent.h>
90 #include <sys/sysproto.h>
91 #include <sys/ucontext.h>
93 #include <sys/vmmeter.h>
94 #include <sys/vnode.h>
96 #include <net/netisr.h>
99 #include <vm/vm_extern.h>
100 #include <vm/vm_kern.h>
101 #include <vm/vm_page.h>
102 #include <vm/vm_map.h>
103 #include <vm/vm_object.h>
104 #include <vm/vm_pager.h>
106 #include <machine/altivec.h>
107 #include <machine/bat.h>
108 #include <machine/cpu.h>
109 #include <machine/elf.h>
110 #include <machine/fpu.h>
111 #include <machine/md_var.h>
112 #include <machine/metadata.h>
113 #include <machine/mmuvar.h>
114 #include <machine/pcb.h>
115 #include <machine/powerpc.h>
116 #include <machine/reg.h>
117 #include <machine/sigframe.h>
118 #include <machine/trap.h>
119 #include <machine/vmparam.h>
123 #include <dev/ofw/openfirm.h>
126 extern vm_offset_t ksym_start, ksym_end;
131 struct pcpu __pcpu[MAXCPU];
132 struct trapframe frame0;
135 vm_offset_t kstack0_phys;
137 char machine[] = "powerpc";
138 SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, "");
140 static int cacheline_size = CACHELINESIZE;
141 SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size,
142 CTLFLAG_RD, &cacheline_size, 0, "");
144 static void cpu_startup(void *);
145 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL);
147 void powerpc_init(u_int, u_int, u_int, void *);
149 int save_ofw_mapping(void);
150 int restore_ofw_mapping(void);
152 void install_extint(void (*)(void));
154 int setfault(faultbuf); /* defined in locore.S */
156 static int grab_mcontext(struct thread *, mcontext_t *, int);
158 void asm_panic(char *);
163 struct pmap ofw_pmap;
166 struct bat battable[16];
168 struct kva_md_info kmi;
170 void setPQL2(int *const size, int *const ways);
173 setPQL2(int *const size, int *const ways)
179 powerpc_ofw_shutdown(void *junk, int howto)
181 if (howto & RB_HALT) {
188 cpu_startup(void *dummy)
192 * Initialise the decrementer-based clock.
197 * Good {morning,afternoon,evening,night}.
199 cpu_setup(PCPU_GET(cpuid));
201 /* startrtclock(); */
205 printf("real memory = %ld (%ld MB)\n", ptoa(physmem),
206 ptoa(physmem) / 1048576);
210 * Display any holes after the first chunk of extended memory.
215 printf("Physical memory chunk(s):\n");
216 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) {
217 int size1 = phys_avail[indx + 1] - phys_avail[indx];
219 printf("0x%08x - 0x%08x, %d bytes (%d pages)\n",
220 phys_avail[indx], phys_avail[indx + 1] - 1, size1,
225 vm_ksubmap_init(&kmi);
227 printf("avail memory = %ld (%ld MB)\n", ptoa(cnt.v_free_count),
228 ptoa(cnt.v_free_count) / 1048576);
231 * Set up buffers, so they can be used to read disk labels.
234 vm_pager_bufferinit();
236 EVENTHANDLER_REGISTER(shutdown_final, powerpc_ofw_shutdown, 0,
241 * OK, enough kmem_alloc/malloc state should be up, lets get on with it!
243 mp_start(); /* fire up the secondaries */
248 extern char kernel_text[], _end[];
250 extern void *trapcode, *trapsize;
251 extern void *alitrap, *alisize;
252 extern void *dsitrap, *dsisize;
253 extern void *decrint, *decrsize;
254 extern void *extint, *extsize;
255 extern void *dblow, *dbsize;
258 powerpc_init(u_int startkernel, u_int endkernel, u_int basekernel, void *mdp)
261 vm_offset_t end, off;
269 * Parse metadata if present and fetch parameters. Must be done
270 * before console is inited so cninit gets the right value of
274 preload_metadata = mdp;
275 kmdp = preload_search_by_type("elf kernel");
277 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
278 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *);
279 end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
281 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t);
282 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t);
288 * Init params/tunables that can be overridden by the loader
293 * Start initializing proc0 and thread0.
295 proc_linkup0(&proc0, &thread0);
296 thread0.td_frame = &frame0;
299 * Set up per-cpu data.
302 pcpu_init(pc, 0, sizeof(struct pcpu));
303 pc->pc_curthread = &thread0;
304 pc->pc_curpcb = thread0.td_pcb;
307 __asm __volatile("mtsprg 0, %0" :: "r"(pc));
312 * Initialize the console before printing anything.
317 * Complain if there is no metadata.
319 if (mdp == NULL || kmdp == NULL) {
320 printf("powerpc_init: no loader metadata.\n");
328 * XXX: Initialize the interrupt tables.
329 * Disable translation in case the vector area
330 * hasn't been mapped (G5)
332 mtmsr(mfmsr() & ~(PSL_IR | PSL_DR));
334 bcopy(&trapcode, (void *)EXC_RST, (size_t)&trapsize);
335 bcopy(&trapcode, (void *)EXC_MCHK, (size_t)&trapsize);
336 bcopy(&dsitrap, (void *)EXC_DSI, (size_t)&dsisize);
337 bcopy(&trapcode, (void *)EXC_ISI, (size_t)&trapsize);
338 bcopy(&trapcode, (void *)EXC_EXI, (size_t)&trapsize);
339 bcopy(&alitrap, (void *)EXC_ALI, (size_t)&alisize);
340 bcopy(&trapcode, (void *)EXC_PGM, (size_t)&trapsize);
341 bcopy(&trapcode, (void *)EXC_FPU, (size_t)&trapsize);
342 bcopy(&trapcode, (void *)EXC_DECR, (size_t)&trapsize);
343 bcopy(&trapcode, (void *)EXC_SC, (size_t)&trapsize);
344 bcopy(&trapcode, (void *)EXC_TRC, (size_t)&trapsize);
345 bcopy(&trapcode, (void *)EXC_FPA, (size_t)&trapsize);
346 bcopy(&trapcode, (void *)EXC_VEC, (size_t)&trapsize);
347 bcopy(&trapcode, (void *)EXC_VECAST, (size_t)&trapsize);
348 bcopy(&trapcode, (void *)EXC_THRM, (size_t)&trapsize);
349 bcopy(&trapcode, (void *)EXC_BPT, (size_t)&trapsize);
351 bcopy(&dblow, (void *)EXC_RST, (size_t)&dbsize);
352 bcopy(&dblow, (void *)EXC_MCHK, (size_t)&dbsize);
353 bcopy(&dblow, (void *)EXC_PGM, (size_t)&dbsize);
354 bcopy(&dblow, (void *)EXC_TRC, (size_t)&dbsize);
355 bcopy(&dblow, (void *)EXC_BPT, (size_t)&dbsize);
357 __syncicache(EXC_RSVD, EXC_LAST - EXC_RSVD);
360 * Make sure translation has been enabled
362 mtmsr(mfmsr() | PSL_IR|PSL_DR|PSL_ME|PSL_RI);
366 * Initialise virtual memory.
368 pmap_mmu_install(MMU_TYPE_OEA, 0); /* XXX temporary */
369 pmap_bootstrap(startkernel, endkernel);
372 * Initialize params/tunables that are derived from memsize
374 init_param2(physmem);
377 * Grab booted kernel's name
379 env = getenv("kernelname");
381 strlcpy(kernelname, env, sizeof(kernelname));
386 * Finish setting up thread0.
388 thread0.td_kstack = kstack0;
389 thread0.td_pcb = (struct pcb *)
390 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
393 * Map and initialise the message buffer.
395 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE)
396 pmap_kenter((vm_offset_t)msgbufp + off, msgbuf_phys + off);
397 msgbufinit(msgbufp, MSGBUF_SIZE);
400 if (boothowto & RB_KDB)
401 kdb_enter_why(KDB_WHY_BOOTFLAGS,
402 "Boot flags requested debugger");
407 bzero(void *buf, size_t len)
413 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) {
418 while (len >= sizeof(u_long) * 8) {
420 *((u_long*) p + 1) = 0;
421 *((u_long*) p + 2) = 0;
422 *((u_long*) p + 3) = 0;
423 len -= sizeof(u_long) * 8;
424 *((u_long*) p + 4) = 0;
425 *((u_long*) p + 5) = 0;
426 *((u_long*) p + 6) = 0;
427 *((u_long*) p + 7) = 0;
428 p += sizeof(u_long) * 8;
431 while (len >= sizeof(u_long)) {
433 len -= sizeof(u_long);
444 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
446 struct trapframe *tf;
447 struct sigframe *sfp;
452 int oonstack, rndfsize;
458 PROC_LOCK_ASSERT(p, MA_OWNED);
459 sig = ksi->ksi_signo;
460 code = ksi->ksi_code;
462 mtx_assert(&psp->ps_mtx, MA_OWNED);
464 oonstack = sigonstack(tf->fixreg[1]);
466 rndfsize = ((sizeof(sf) + 15) / 16) * 16;
468 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
474 memset(&sf, 0, sizeof(sf));
475 grab_mcontext(td, &sf.sf_uc.uc_mcontext, 0);
476 sf.sf_uc.uc_sigmask = *mask;
477 sf.sf_uc.uc_stack = td->td_sigstk;
478 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK)
479 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE;
481 sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0;
484 * Allocate and validate space for the signal handler context.
486 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&
487 SIGISMEMBER(psp->ps_sigonstack, sig)) {
488 sfp = (struct sigframe *)(td->td_sigstk.ss_sp +
489 td->td_sigstk.ss_size - rndfsize);
491 sfp = (struct sigframe *)(tf->fixreg[1] - rndfsize);
495 * Translate the signal if appropriate (Linux emu ?)
497 if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize)
498 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)];
501 * Save the floating-point state, if necessary, then copy it.
506 * Set up the registers to return to sigcode.
508 * r1/sp - sigframe ptr
509 * lr - sig function, dispatched to by blrl in trampoline
511 * r4 - SIGINFO ? &siginfo : exception code
513 * srr0 - trampoline function addr
515 tf->lr = (register_t)catcher;
516 tf->fixreg[1] = (register_t)sfp;
517 tf->fixreg[FIRSTARG] = sig;
518 tf->fixreg[FIRSTARG+2] = (register_t)&sfp->sf_uc;
519 if (SIGISMEMBER(psp->ps_siginfo, sig)) {
521 * Signal handler installed with SA_SIGINFO.
523 tf->fixreg[FIRSTARG+1] = (register_t)&sfp->sf_si;
526 * Fill siginfo structure.
528 sf.sf_si = ksi->ksi_info;
529 sf.sf_si.si_signo = sig;
530 sf.sf_si.si_addr = (void *) ((tf->exc == EXC_DSI) ?
533 /* Old FreeBSD-style arguments. */
534 tf->fixreg[FIRSTARG+1] = code;
535 tf->fixreg[FIRSTARG+3] = (tf->exc == EXC_DSI) ?
538 mtx_unlock(&psp->ps_mtx);
541 tf->srr0 = (register_t)(PS_STRINGS - *(p->p_sysent->sv_szsigcode));
544 * copy the frame out to userland.
546 if (copyout(&sf, sfp, sizeof(*sfp)) != 0) {
548 * Process has trashed its stack. Kill it.
550 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp);
555 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td,
556 tf->srr0, tf->fixreg[1]);
559 mtx_lock(&psp->ps_mtx);
563 sigreturn(struct thread *td, struct sigreturn_args *uap)
569 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp);
571 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) {
572 CTR1(KTR_SIG, "sigreturn: efault td=%p", td);
576 error = set_mcontext(td, &uc.uc_mcontext);
582 td->td_sigmask = uc.uc_sigmask;
583 SIG_CANTMASK(td->td_sigmask);
587 CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x",
588 td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]);
590 return (EJUSTRETURN);
593 #ifdef COMPAT_FREEBSD4
595 freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap)
598 return sigreturn(td, (struct sigreturn_args *)uap);
603 * Construct a PCB from a trapframe. This is called from kdb_trap() where
604 * we want to start a backtrace from the function that caused us to enter
605 * the debugger. We have the context in the trapframe, but base the trace
606 * on the PCB. The PCB doesn't have to be perfect, as long as it contains
607 * enough for a backtrace.
610 makectx(struct trapframe *tf, struct pcb *pcb)
613 pcb->pcb_lr = tf->srr0;
614 pcb->pcb_sp = tf->fixreg[1];
618 * get_mcontext/sendsig helper routine that doesn't touch the
622 grab_mcontext(struct thread *td, mcontext_t *mcp, int flags)
628 memset(mcp, 0, sizeof(mcontext_t));
630 mcp->mc_vers = _MC_VERSION;
632 memcpy(&mcp->mc_frame, td->td_frame, sizeof(struct trapframe));
633 if (flags & GET_MC_CLEAR_RET) {
639 * This assumes that floating-point context is *not* lazy,
640 * so if the thread has used FP there would have been a
641 * FP-unavailable exception that would have set things up
644 if (pcb->pcb_flags & PCB_FPU) {
645 KASSERT(td == curthread,
646 ("get_mcontext: fp save not curthread"));
650 mcp->mc_flags |= _MC_FP_VALID;
651 memcpy(&mcp->mc_fpscr, &pcb->pcb_fpu.fpscr, sizeof(double));
652 memcpy(mcp->mc_fpreg, pcb->pcb_fpu.fpr, 32*sizeof(double));
656 * Repeat for Altivec context
659 if (pcb->pcb_flags & PCB_VEC) {
660 KASSERT(td == curthread,
661 ("get_mcontext: fp save not curthread"));
665 mcp->mc_flags |= _MC_AV_VALID;
666 mcp->mc_vscr = pcb->pcb_vec.vscr;
667 mcp->mc_vrsave = pcb->pcb_vec.vrsave;
668 memcpy(mcp->mc_avec, pcb->pcb_vec.vr, sizeof(mcp->mc_avec));
671 mcp->mc_len = sizeof(*mcp);
677 get_mcontext(struct thread *td, mcontext_t *mcp, int flags)
681 error = grab_mcontext(td, mcp, flags);
683 PROC_LOCK(curthread->td_proc);
684 mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]);
685 PROC_UNLOCK(curthread->td_proc);
692 set_mcontext(struct thread *td, const mcontext_t *mcp)
695 struct trapframe *tf;
700 if (mcp->mc_vers != _MC_VERSION ||
701 mcp->mc_len != sizeof(*mcp))
705 * Don't let the user set privileged MSR bits
707 if ((mcp->mc_srr1 & PSL_USERSTATIC) != (tf->srr1 & PSL_USERSTATIC)) {
711 memcpy(tf, mcp->mc_frame, sizeof(mcp->mc_frame));
713 if (mcp->mc_flags & _MC_FP_VALID) {
714 if ((pcb->pcb_flags & PCB_FPU) != PCB_FPU) {
719 memcpy(&pcb->pcb_fpu.fpscr, &mcp->mc_fpscr, sizeof(double));
720 memcpy(pcb->pcb_fpu.fpr, mcp->mc_fpreg, 32*sizeof(double));
723 if (mcp->mc_flags & _MC_AV_VALID) {
724 if ((pcb->pcb_flags & PCB_VEC) != PCB_VEC) {
729 pcb->pcb_vec.vscr = mcp->mc_vscr;
730 pcb->pcb_vec.vrsave = mcp->mc_vrsave;
731 memcpy(pcb->pcb_vec.vr, mcp->mc_avec, sizeof(mcp->mc_avec));
750 /* Get current clock frequency for the given cpu id. */
752 cpu_est_clockrate(int cpu_id, uint64_t *rate)
759 * Shutdown the CPU as much as possible.
771 /* TODO: Insert code to halt (until next interrupt) */
774 if ((mfmsr() & PSL_EE) != PSL_EE) {
775 struct thread *td = curthread;
776 printf("td msr %x\n", td->td_md.md_saved_msr);
777 panic("ints disabled in idleproc!");
783 * Set set up registers on exec.
786 exec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings)
788 struct trapframe *tf;
789 struct ps_strings arginfo;
792 bzero(tf, sizeof *tf);
793 tf->fixreg[1] = -roundup(-stack + 8, 16);
796 * XXX Machine-independent code has already copied arguments and
797 * XXX environment to userland. Get them back here.
799 (void)copyin((char *)PS_STRINGS, &arginfo, sizeof(arginfo));
802 * Set up arguments for _start():
803 * _start(argc, argv, envp, obj, cleanup, ps_strings);
806 * - obj and cleanup are the auxilliary and termination
807 * vectors. They are fixed up by ld.elf_so.
808 * - ps_strings is a NetBSD extention, and will be
809 * ignored by executables which are strictly
810 * compliant with the SVR4 ABI.
812 * XXX We have to set both regs and retval here due to different
813 * XXX calling convention in trap.c and init_main.c.
816 * XXX PG: these get overwritten in the syscall return code.
817 * execve() should return EJUSTRETURN, like it does on NetBSD.
818 * Emulate by setting the syscall return value cells. The
819 * registers still have to be set for init's fork trampoline.
821 td->td_retval[0] = arginfo.ps_nargvstr;
822 td->td_retval[1] = (register_t)arginfo.ps_argvstr;
823 tf->fixreg[3] = arginfo.ps_nargvstr;
824 tf->fixreg[4] = (register_t)arginfo.ps_argvstr;
825 tf->fixreg[5] = (register_t)arginfo.ps_envstr;
826 tf->fixreg[6] = 0; /* auxillary vector */
827 tf->fixreg[7] = 0; /* termination vector */
828 tf->fixreg[8] = (register_t)PS_STRINGS; /* NetBSD extension */
831 tf->srr1 = PSL_MBO | PSL_USERSET | PSL_FE_DFLT;
832 td->td_pcb->pcb_flags = 0;
836 fill_regs(struct thread *td, struct reg *regs)
838 struct trapframe *tf;
841 memcpy(regs, tf, sizeof(struct reg));
847 fill_dbregs(struct thread *td, struct dbreg *dbregs)
849 /* No debug registers on PowerPC */
854 fill_fpregs(struct thread *td, struct fpreg *fpregs)
860 if ((pcb->pcb_flags & PCB_FPU) == 0)
861 memset(fpregs, 0, sizeof(struct fpreg));
863 memcpy(fpregs, &pcb->pcb_fpu, sizeof(struct fpreg));
869 set_regs(struct thread *td, struct reg *regs)
871 struct trapframe *tf;
874 memcpy(tf, regs, sizeof(struct reg));
880 set_dbregs(struct thread *td, struct dbreg *dbregs)
882 /* No debug registers on PowerPC */
887 set_fpregs(struct thread *td, struct fpreg *fpregs)
892 if ((pcb->pcb_flags & PCB_FPU) == 0)
894 memcpy(&pcb->pcb_fpu, fpregs, sizeof(struct fpreg));
900 ptrace_set_pc(struct thread *td, unsigned long addr)
902 struct trapframe *tf;
905 tf->srr0 = (register_t)addr;
911 ptrace_single_step(struct thread *td)
913 struct trapframe *tf;
922 ptrace_clear_single_step(struct thread *td)
924 struct trapframe *tf;
933 * Initialise a struct pcpu.
936 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz)
947 if (td->td_md.md_spinlock_count == 0)
948 td->td_md.md_saved_msr = intr_disable();
949 td->td_md.md_spinlock_count++;
960 td->td_md.md_spinlock_count--;
961 if (td->td_md.md_spinlock_count == 0)
962 intr_restore(td->td_md.md_saved_msr);
966 * kcopy(const void *src, void *dst, size_t len);
968 * Copy len bytes from src to dst, aborting if we encounter a fatal
971 * kcopy() _must_ save and restore the old fault handler since it is
972 * called by uiomove(), which may be in the path of servicing a non-fatal
976 kcopy(const void *src, void *dst, size_t len)
979 faultbuf env, *oldfault;
982 td = PCPU_GET(curthread);
983 oldfault = td->td_pcb->pcb_onfault;
984 if ((rv = setfault(env)) != 0) {
985 td->td_pcb->pcb_onfault = oldfault;
989 memcpy(dst, src, len);
991 td->td_pcb->pcb_onfault = oldfault;
996 asm_panic(char *pstr)
1001 int db_trap_glue(struct trapframe *); /* Called from trap_subr.S */
1004 db_trap_glue(struct trapframe *frame)
1006 if (!(frame->srr1 & PSL_PR)
1007 && (frame->exc == EXC_TRC || frame->exc == EXC_RUNMODETRC
1008 || (frame->exc == EXC_PGM
1009 && (frame->srr1 & 0x20000))
1010 || frame->exc == EXC_BPT
1011 || frame->exc == EXC_DSI)) {
1012 int type = frame->exc;
1013 if (type == EXC_PGM && (frame->srr1 & 0x20000)) {
1014 type = T_BREAKPOINT;
1016 return (kdb_trap(type, 0, frame));