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/bat.h>
107 #include <machine/cpu.h>
108 #include <machine/elf.h>
109 #include <machine/fpu.h>
110 #include <machine/md_var.h>
111 #include <machine/metadata.h>
112 #include <machine/mmuvar.h>
113 #include <machine/pcb.h>
114 #include <machine/powerpc.h>
115 #include <machine/reg.h>
116 #include <machine/sigframe.h>
117 #include <machine/trap.h>
118 #include <machine/vmparam.h>
122 #include <dev/ofw/openfirm.h>
125 extern vm_offset_t ksym_start, ksym_end;
130 struct pcpu __pcpu[MAXCPU];
131 struct trapframe frame0;
134 vm_offset_t kstack0_phys;
136 char machine[] = "powerpc";
137 SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, "");
139 static char model[128];
140 SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD, model, 0, "");
142 static int cacheline_size = CACHELINESIZE;
143 SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size,
144 CTLFLAG_RD, &cacheline_size, 0, "");
146 static void cpu_startup(void *);
147 SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL)
149 void powerpc_init(u_int, u_int, u_int, void *);
151 int save_ofw_mapping(void);
152 int restore_ofw_mapping(void);
154 void install_extint(void (*)(void));
156 int setfault(faultbuf); /* defined in locore.S */
158 static int grab_mcontext(struct thread *, mcontext_t *, int);
160 void asm_panic(char *);
165 struct pmap ofw_pmap;
168 struct bat battable[16];
170 struct kva_md_info kmi;
172 void setPQL2(int *const size, int *const ways);
175 setPQL2(int *const size, int *const ways)
181 powerpc_ofw_shutdown(void *junk, int howto)
183 if (howto & RB_HALT) {
190 cpu_startup(void *dummy)
194 * Initialise the decrementer-based clock.
199 * Good {morning,afternoon,evening,night}.
201 cpu_setup(PCPU_GET(cpuid));
203 /* startrtclock(); */
207 printf("real memory = %ld (%ld MB)\n", ptoa(physmem),
208 ptoa(physmem) / 1048576);
212 * Display any holes after the first chunk of extended memory.
217 printf("Physical memory chunk(s):\n");
218 for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) {
219 int size1 = phys_avail[indx + 1] - phys_avail[indx];
221 printf("0x%08x - 0x%08x, %d bytes (%d pages)\n",
222 phys_avail[indx], phys_avail[indx + 1] - 1, size1,
227 vm_ksubmap_init(&kmi);
229 printf("avail memory = %ld (%ld MB)\n", ptoa(cnt.v_free_count),
230 ptoa(cnt.v_free_count) / 1048576);
233 * Set up buffers, so they can be used to read disk labels.
236 vm_pager_bufferinit();
238 EVENTHANDLER_REGISTER(shutdown_final, powerpc_ofw_shutdown, 0,
243 * OK, enough kmem_alloc/malloc state should be up, lets get on with it!
245 mp_start(); /* fire up the secondaries */
250 extern char kernel_text[], _end[];
252 extern void *trapcode, *trapsize;
253 extern void *alitrap, *alisize;
254 extern void *dsitrap, *dsisize;
255 extern void *decrint, *decrsize;
256 extern void *extint, *extsize;
257 extern void *dblow, *dbsize;
258 extern void *vectrap, *vectrapsize;
261 powerpc_init(u_int startkernel, u_int endkernel, u_int basekernel, void *mdp)
264 vm_offset_t end, off;
272 * Parse metadata if present and fetch parameters. Must be done
273 * before console is inited so cninit gets the right value of
277 preload_metadata = mdp;
278 kmdp = preload_search_by_type("elf kernel");
280 boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
281 kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *);
282 end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
284 ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t);
285 ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t);
291 * Init params/tunables that can be overridden by the loader
296 * Start initializing proc0 and thread0.
299 proc_linkup(&proc0, &ksegrp0, &thread0);
301 proc_linkup(&proc0, &thread0);
303 thread0.td_frame = &frame0;
306 * Set up per-cpu data.
309 pcpu_init(pc, 0, sizeof(struct pcpu));
310 pc->pc_curthread = &thread0;
311 pc->pc_curpcb = thread0.td_pcb;
314 __asm __volatile("mtsprg 0, %0" :: "r"(pc));
319 * Initialize the console before printing anything.
324 * Complain if there is no metadata.
326 if (mdp == NULL || kmdp == NULL) {
327 printf("powerpc_init: no loader metadata.\n");
335 * XXX: Initialize the interrupt tables.
336 * Disable translation in case the vector area
337 * hasn't been mapped (G5)
339 mtmsr(mfmsr() & ~(PSL_IR | PSL_DR));
341 bcopy(&trapcode, (void *)EXC_RST, (size_t)&trapsize);
342 bcopy(&trapcode, (void *)EXC_MCHK, (size_t)&trapsize);
343 bcopy(&dsitrap, (void *)EXC_DSI, (size_t)&dsisize);
344 bcopy(&trapcode, (void *)EXC_ISI, (size_t)&trapsize);
345 bcopy(&trapcode, (void *)EXC_EXI, (size_t)&trapsize);
346 bcopy(&alitrap, (void *)EXC_ALI, (size_t)&alisize);
347 bcopy(&trapcode, (void *)EXC_PGM, (size_t)&trapsize);
348 bcopy(&trapcode, (void *)EXC_FPU, (size_t)&trapsize);
349 bcopy(&trapcode, (void *)EXC_DECR, (size_t)&trapsize);
350 bcopy(&trapcode, (void *)EXC_SC, (size_t)&trapsize);
351 bcopy(&trapcode, (void *)EXC_TRC, (size_t)&trapsize);
352 bcopy(&trapcode, (void *)EXC_FPA, (size_t)&trapsize);
353 bcopy(&vectrap, (void *)EXC_VEC, (size_t)&vectrapsize);
354 bcopy(&trapcode, (void *)EXC_VECAST, (size_t)&trapsize);
355 bcopy(&trapcode, (void *)EXC_THRM, (size_t)&trapsize);
356 bcopy(&trapcode, (void *)EXC_BPT, (size_t)&trapsize);
358 bcopy(&dblow, (void *)EXC_RST, (size_t)&dbsize);
359 bcopy(&dblow, (void *)EXC_MCHK, (size_t)&dbsize);
360 bcopy(&dblow, (void *)EXC_PGM, (size_t)&dbsize);
361 bcopy(&dblow, (void *)EXC_TRC, (size_t)&dbsize);
362 bcopy(&dblow, (void *)EXC_BPT, (size_t)&dbsize);
364 __syncicache(EXC_RSVD, EXC_LAST - EXC_RSVD);
367 * Make sure translation has been enabled
369 mtmsr(mfmsr() | PSL_IR|PSL_DR|PSL_ME|PSL_RI);
373 * Initialise virtual memory.
375 pmap_mmu_install(MMU_TYPE_OEA, 0); /* XXX temporary */
376 pmap_bootstrap(startkernel, endkernel);
379 * Initialize params/tunables that are derived from memsize
381 init_param2(physmem);
384 * Grab booted kernel's name
386 env = getenv("kernelname");
388 strlcpy(kernelname, env, sizeof(kernelname));
393 * Finish setting up thread0.
395 thread0.td_kstack = kstack0;
396 thread0.td_pcb = (struct pcb *)
397 (thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
400 * Map and initialise the message buffer.
402 for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE)
403 pmap_kenter((vm_offset_t)msgbufp + off, msgbuf_phys + off);
404 msgbufinit(msgbufp, MSGBUF_SIZE);
407 if (boothowto & RB_KDB)
408 kdb_enter("Boot flags requested debugger");
413 bzero(void *buf, size_t len)
419 while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) {
424 while (len >= sizeof(u_long) * 8) {
426 *((u_long*) p + 1) = 0;
427 *((u_long*) p + 2) = 0;
428 *((u_long*) p + 3) = 0;
429 len -= sizeof(u_long) * 8;
430 *((u_long*) p + 4) = 0;
431 *((u_long*) p + 5) = 0;
432 *((u_long*) p + 6) = 0;
433 *((u_long*) p + 7) = 0;
434 p += sizeof(u_long) * 8;
437 while (len >= sizeof(u_long)) {
439 len -= sizeof(u_long);
450 sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask)
452 struct trapframe *tf;
453 struct sigframe *sfp;
458 int oonstack, rndfsize;
464 PROC_LOCK_ASSERT(p, MA_OWNED);
465 sig = ksi->ksi_signo;
466 code = ksi->ksi_code;
468 mtx_assert(&psp->ps_mtx, MA_OWNED);
470 oonstack = sigonstack(tf->fixreg[1]);
472 rndfsize = ((sizeof(sf) + 15) / 16) * 16;
474 CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
480 memset(&sf, 0, sizeof(sf));
481 grab_mcontext(td, &sf.sf_uc.uc_mcontext, 0);
482 sf.sf_uc.uc_sigmask = *mask;
483 sf.sf_uc.uc_stack = td->td_sigstk;
484 sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK)
485 ? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE;
487 sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0;
490 * Allocate and validate space for the signal handler context.
492 if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&
493 SIGISMEMBER(psp->ps_sigonstack, sig)) {
494 sfp = (struct sigframe *)((caddr_t)td->td_sigstk.ss_sp +
495 td->td_sigstk.ss_size - rndfsize);
497 sfp = (struct sigframe *)(tf->fixreg[1] - rndfsize);
501 * Translate the signal if appropriate (Linux emu ?)
503 if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize)
504 sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)];
507 * Save the floating-point state, if necessary, then copy it.
512 * Set up the registers to return to sigcode.
514 * r1/sp - sigframe ptr
515 * lr - sig function, dispatched to by blrl in trampoline
517 * r4 - SIGINFO ? &siginfo : exception code
519 * srr0 - trampoline function addr
521 tf->lr = (register_t)catcher;
522 tf->fixreg[1] = (register_t)sfp;
523 tf->fixreg[FIRSTARG] = sig;
524 tf->fixreg[FIRSTARG+2] = (register_t)&sfp->sf_uc;
525 if (SIGISMEMBER(psp->ps_siginfo, sig)) {
527 * Signal handler installed with SA_SIGINFO.
529 tf->fixreg[FIRSTARG+1] = (register_t)&sfp->sf_si;
532 * Fill siginfo structure.
534 sf.sf_si = ksi->ksi_info;
535 sf.sf_si.si_signo = sig;
536 sf.sf_si.si_addr = (void *) ((tf->exc == EXC_DSI) ?
539 /* Old FreeBSD-style arguments. */
540 tf->fixreg[FIRSTARG+1] = code;
541 tf->fixreg[FIRSTARG+3] = (tf->exc == EXC_DSI) ?
544 mtx_unlock(&psp->ps_mtx);
547 tf->srr0 = (register_t)(PS_STRINGS - *(p->p_sysent->sv_szsigcode));
550 * copy the frame out to userland.
552 if (copyout((caddr_t)&sf, (caddr_t)sfp, sizeof(sf)) != 0) {
554 * Process has trashed its stack. Kill it.
556 CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp);
561 CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td,
562 tf->srr0, tf->fixreg[1]);
565 mtx_lock(&psp->ps_mtx);
569 sigreturn(struct thread *td, struct sigreturn_args *uap)
575 CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp);
577 if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) {
578 CTR1(KTR_SIG, "sigreturn: efault td=%p", td);
582 error = set_mcontext(td, &uc.uc_mcontext);
588 td->td_sigmask = uc.uc_sigmask;
589 SIG_CANTMASK(td->td_sigmask);
593 CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x",
594 td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]);
596 return (EJUSTRETURN);
599 #ifdef COMPAT_FREEBSD4
601 freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap)
604 return sigreturn(td, (struct sigreturn_args *)uap);
609 * Construct a PCB from a trapframe. This is called from kdb_trap() where
610 * we want to start a backtrace from the function that caused us to enter
611 * the debugger. We have the context in the trapframe, but base the trace
612 * on the PCB. The PCB doesn't have to be perfect, as long as it contains
613 * enough for a backtrace.
616 makectx(struct trapframe *tf, struct pcb *pcb)
619 pcb->pcb_lr = tf->srr0;
620 pcb->pcb_sp = tf->fixreg[1];
624 * get_mcontext/sendsig helper routine that doesn't touch the
628 grab_mcontext(struct thread *td, mcontext_t *mcp, int flags)
634 memset(mcp, 0, sizeof(mcontext_t));
636 mcp->mc_vers = _MC_VERSION;
638 memcpy(&mcp->mc_frame, td->td_frame, sizeof(struct trapframe));
639 if (flags & GET_MC_CLEAR_RET) {
645 * This assumes that floating-point context is *not* lazy,
646 * so if the thread has used FP there would have been a
647 * FP-unavailable exception that would have set things up
650 if (pcb->pcb_flags & PCB_FPU) {
651 KASSERT(td == curthread,
652 ("get_mcontext: fp save not curthread"));
656 mcp->mc_flags |= _MC_FP_VALID;
657 memcpy(&mcp->mc_fpscr, &pcb->pcb_fpu.fpscr, sizeof(double));
658 memcpy(mcp->mc_fpreg, pcb->pcb_fpu.fpr, 32*sizeof(double));
661 /* XXX Altivec context ? */
663 mcp->mc_len = sizeof(*mcp);
669 get_mcontext(struct thread *td, mcontext_t *mcp, int flags)
673 error = grab_mcontext(td, mcp, flags);
675 PROC_LOCK(curthread->td_proc);
676 mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]);
677 PROC_UNLOCK(curthread->td_proc);
684 set_mcontext(struct thread *td, const mcontext_t *mcp)
687 struct trapframe *tf;
692 if (mcp->mc_vers != _MC_VERSION ||
693 mcp->mc_len != sizeof(*mcp))
697 * Don't let the user set privileged MSR bits
699 if ((mcp->mc_srr1 & PSL_USERSTATIC) != (tf->srr1 & PSL_USERSTATIC)) {
703 memcpy(tf, mcp->mc_frame, sizeof(mcp->mc_frame));
705 if (mcp->mc_flags & _MC_FP_VALID) {
706 if ((pcb->pcb_flags & PCB_FPU) != PCB_FPU) {
711 memcpy(&pcb->pcb_fpu.fpscr, &mcp->mc_fpscr, sizeof(double));
712 memcpy(pcb->pcb_fpu.fpr, mcp->mc_fpreg, 32*sizeof(double));
715 /* XXX Altivec context? */
725 /* Get current clock frequency for the given cpu id. */
727 cpu_est_clockrate(int cpu_id, uint64_t *rate)
734 * Shutdown the CPU as much as possible.
746 /* TODO: Insert code to halt (until next interrupt) */
749 if ((mfmsr() & PSL_EE) != PSL_EE) {
750 struct thread *td = curthread;
751 printf("td msr %x\n", td->td_md.md_saved_msr);
752 panic("ints disabled in idleproc!");
758 * Set set up registers on exec.
761 exec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings)
763 struct trapframe *tf;
764 struct ps_strings arginfo;
767 bzero(tf, sizeof *tf);
768 tf->fixreg[1] = -roundup(-stack + 8, 16);
771 * XXX Machine-independent code has already copied arguments and
772 * XXX environment to userland. Get them back here.
774 (void)copyin((char *)PS_STRINGS, &arginfo, sizeof(arginfo));
777 * Set up arguments for _start():
778 * _start(argc, argv, envp, obj, cleanup, ps_strings);
781 * - obj and cleanup are the auxilliary and termination
782 * vectors. They are fixed up by ld.elf_so.
783 * - ps_strings is a NetBSD extention, and will be
784 * ignored by executables which are strictly
785 * compliant with the SVR4 ABI.
787 * XXX We have to set both regs and retval here due to different
788 * XXX calling convention in trap.c and init_main.c.
791 * XXX PG: these get overwritten in the syscall return code.
792 * execve() should return EJUSTRETURN, like it does on NetBSD.
793 * Emulate by setting the syscall return value cells. The
794 * registers still have to be set for init's fork trampoline.
796 td->td_retval[0] = arginfo.ps_nargvstr;
797 td->td_retval[1] = (register_t)arginfo.ps_argvstr;
798 tf->fixreg[3] = arginfo.ps_nargvstr;
799 tf->fixreg[4] = (register_t)arginfo.ps_argvstr;
800 tf->fixreg[5] = (register_t)arginfo.ps_envstr;
801 tf->fixreg[6] = 0; /* auxillary vector */
802 tf->fixreg[7] = 0; /* termination vector */
803 tf->fixreg[8] = (register_t)PS_STRINGS; /* NetBSD extension */
806 tf->srr1 = PSL_MBO | PSL_USERSET | PSL_FE_DFLT;
807 td->td_pcb->pcb_flags = 0;
811 fill_regs(struct thread *td, struct reg *regs)
813 struct trapframe *tf;
816 memcpy(regs, tf, sizeof(struct reg));
822 fill_dbregs(struct thread *td, struct dbreg *dbregs)
824 /* No debug registers on PowerPC */
829 fill_fpregs(struct thread *td, struct fpreg *fpregs)
835 if ((pcb->pcb_flags & PCB_FPU) == 0)
836 memset(fpregs, 0, sizeof(struct fpreg));
838 memcpy(fpregs, &pcb->pcb_fpu, sizeof(struct fpreg));
844 set_regs(struct thread *td, struct reg *regs)
846 struct trapframe *tf;
849 memcpy(tf, regs, sizeof(struct reg));
855 set_dbregs(struct thread *td, struct dbreg *dbregs)
857 /* No debug registers on PowerPC */
862 set_fpregs(struct thread *td, struct fpreg *fpregs)
867 if ((pcb->pcb_flags & PCB_FPU) == 0)
869 memcpy(&pcb->pcb_fpu, fpregs, sizeof(struct fpreg));
875 ptrace_set_pc(struct thread *td, unsigned long addr)
877 struct trapframe *tf;
880 tf->srr0 = (register_t)addr;
886 ptrace_single_step(struct thread *td)
888 struct trapframe *tf;
897 ptrace_clear_single_step(struct thread *td)
899 struct trapframe *tf;
908 * Initialise a struct pcpu.
911 cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz)
922 if (td->td_md.md_spinlock_count == 0)
923 td->td_md.md_saved_msr = intr_disable();
924 td->td_md.md_spinlock_count++;
935 td->td_md.md_spinlock_count--;
936 if (td->td_md.md_spinlock_count == 0)
937 intr_restore(td->td_md.md_saved_msr);
941 * kcopy(const void *src, void *dst, size_t len);
943 * Copy len bytes from src to dst, aborting if we encounter a fatal
946 * kcopy() _must_ save and restore the old fault handler since it is
947 * called by uiomove(), which may be in the path of servicing a non-fatal
951 kcopy(const void *src, void *dst, size_t len)
954 faultbuf env, *oldfault;
957 td = PCPU_GET(curthread);
958 oldfault = td->td_pcb->pcb_onfault;
959 if ((rv = setfault(env)) != 0) {
960 td->td_pcb->pcb_onfault = oldfault;
964 memcpy(dst, src, len);
966 td->td_pcb->pcb_onfault = oldfault;
971 asm_panic(char *pstr)
976 int db_trap_glue(struct trapframe *); /* Called from trap_subr.S */
979 db_trap_glue(struct trapframe *frame)
981 if (!(frame->srr1 & PSL_PR)
982 && (frame->exc == EXC_TRC || frame->exc == EXC_RUNMODETRC
983 || (frame->exc == EXC_PGM
984 && (frame->srr1 & 0x20000))
985 || frame->exc == EXC_BPT
986 || frame->exc == EXC_DSI)) {
987 int type = frame->exc;
988 if (type == EXC_PGM && (frame->srr1 & 0x20000)) {
991 return (kdb_trap(type, 0, frame));