934 lines
22 KiB
C
934 lines
22 KiB
C
/*-
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* Copyright (C) 1995, 1996 Wolfgang Solfrank.
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* Copyright (C) 1995, 1996 TooLs GmbH.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by TooLs GmbH.
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* 4. The name of TooLs GmbH may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (C) 2001 Benno Rice
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY Benno Rice ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* $NetBSD: machdep.c,v 1.74.2.1 2000/11/01 16:13:48 tv Exp $
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_compat.h"
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#include "opt_ddb.h"
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#include "opt_kstack_pages.h"
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#include "opt_msgbuf.h"
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kdb.h>
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#include <sys/eventhandler.h>
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#include <sys/imgact.h>
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#include <sys/sysproto.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/ktr.h>
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#include <sys/signalvar.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/malloc.h>
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#include <sys/reboot.h>
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#include <sys/bio.h>
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#include <sys/buf.h>
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#include <sys/bus.h>
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#include <sys/mbuf.h>
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#include <sys/vmmeter.h>
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#include <sys/msgbuf.h>
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#include <sys/exec.h>
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#include <sys/sysctl.h>
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#include <sys/uio.h>
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#include <sys/linker.h>
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#include <sys/cons.h>
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#include <sys/ucontext.h>
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#include <sys/sysent.h>
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#include <net/netisr.h>
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#include <vm/vm.h>
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#include <vm/vm_kern.h>
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#include <vm/vm_page.h>
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#include <vm/vm_map.h>
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#include <vm/vm_extern.h>
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#include <vm/vm_object.h>
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#include <vm/vm_pager.h>
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#include <sys/ptrace.h>
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#include <machine/bat.h>
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#include <machine/clock.h>
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#include <machine/cpu.h>
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#include <machine/md_var.h>
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#include <machine/metadata.h>
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#include <machine/pcb.h>
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#include <machine/reg.h>
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#include <machine/fpu.h>
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#include <machine/vmparam.h>
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#include <machine/elf.h>
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#include <machine/trap.h>
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#include <machine/powerpc.h>
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#include <dev/ofw/openfirm.h>
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#include <sys/vnode.h>
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#include <machine/sigframe.h>
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#include <ddb/ddb.h>
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#ifdef DDB
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extern vm_offset_t ksym_start, ksym_end;
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#endif
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int cold = 1;
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char pcpu0[PAGE_SIZE];
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struct trapframe frame0;
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vm_offset_t kstack0;
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vm_offset_t kstack0_phys;
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char machine[] = "powerpc";
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SYSCTL_STRING(_hw, HW_MACHINE, machine, CTLFLAG_RD, machine, 0, "");
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static char model[128];
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SYSCTL_STRING(_hw, HW_MODEL, model, CTLFLAG_RD, model, 0, "");
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static int cacheline_size = CACHELINESIZE;
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SYSCTL_INT(_machdep, CPU_CACHELINE, cacheline_size,
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CTLFLAG_RD, &cacheline_size, 0, "");
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static void cpu_startup(void *);
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SYSINIT(cpu, SI_SUB_CPU, SI_ORDER_FIRST, cpu_startup, NULL)
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void powerpc_init(u_int, u_int, u_int, void *);
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int save_ofw_mapping(void);
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int restore_ofw_mapping(void);
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void install_extint(void (*)(void));
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int setfault(faultbuf); /* defined in locore.S */
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static int grab_mcontext(struct thread *, mcontext_t *, int);
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void asm_panic(char *);
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long Maxmem = 0;
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struct pmap ofw_pmap;
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extern int ofmsr;
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struct bat battable[16];
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struct kva_md_info kmi;
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static void
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powerpc_ofw_shutdown(void *junk, int howto)
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{
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if (howto & RB_HALT) {
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OF_halt();
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}
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OF_reboot();
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}
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static void
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cpu_startup(void *dummy)
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{
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/*
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* Initialise the decrementer-based clock.
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*/
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decr_init();
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/*
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* Good {morning,afternoon,evening,night}.
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*/
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cpu_setup(PCPU_GET(cpuid));
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/* startrtclock(); */
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#ifdef PERFMON
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perfmon_init();
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#endif
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printf("real memory = %ld (%ld MB)\n", ptoa(Maxmem),
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ptoa(Maxmem) / 1048576);
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/*
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* Display any holes after the first chunk of extended memory.
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*/
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if (bootverbose) {
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int indx;
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printf("Physical memory chunk(s):\n");
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for (indx = 0; phys_avail[indx + 1] != 0; indx += 2) {
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int size1 = phys_avail[indx + 1] - phys_avail[indx];
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printf("0x%08x - 0x%08x, %d bytes (%d pages)\n",
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phys_avail[indx], phys_avail[indx + 1] - 1, size1,
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size1 / PAGE_SIZE);
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}
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}
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vm_ksubmap_init(&kmi);
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printf("avail memory = %ld (%ld MB)\n", ptoa(cnt.v_free_count),
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ptoa(cnt.v_free_count) / 1048576);
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/*
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* Set up buffers, so they can be used to read disk labels.
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*/
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bufinit();
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vm_pager_bufferinit();
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EVENTHANDLER_REGISTER(shutdown_final, powerpc_ofw_shutdown, 0,
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SHUTDOWN_PRI_LAST);
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#ifdef SMP
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/*
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* OK, enough kmem_alloc/malloc state should be up, lets get on with it!
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*/
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mp_start(); /* fire up the secondaries */
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mp_announce();
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#endif /* SMP */
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}
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extern char kernel_text[], _end[];
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extern void *trapcode, *trapsize;
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extern void *alitrap, *alisize;
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extern void *dsitrap, *dsisize;
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extern void *decrint, *decrsize;
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extern void *extint, *extsize;
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extern void *dblow, *dbsize;
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void
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powerpc_init(u_int startkernel, u_int endkernel, u_int basekernel, void *mdp)
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{
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struct pcpu *pc;
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vm_offset_t end, off;
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void *kmdp;
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end = 0;
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kmdp = NULL;
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/*
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* Parse metadata if present and fetch parameters. Must be done
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* before console is inited so cninit gets the right value of
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* boothowto.
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*/
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if (mdp != NULL) {
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preload_metadata = mdp;
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kmdp = preload_search_by_type("elf kernel");
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if (kmdp != NULL) {
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boothowto = MD_FETCH(kmdp, MODINFOMD_HOWTO, int);
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kern_envp = MD_FETCH(kmdp, MODINFOMD_ENVP, char *);
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end = MD_FETCH(kmdp, MODINFOMD_KERNEND, vm_offset_t);
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#ifdef DDB
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ksym_start = MD_FETCH(kmdp, MODINFOMD_SSYM, uintptr_t);
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ksym_end = MD_FETCH(kmdp, MODINFOMD_ESYM, uintptr_t);
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#endif
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}
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}
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/*
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* Init params/tunables that can be overridden by the loader
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*/
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init_param1();
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/*
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* Start initializing proc0 and thread0.
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*/
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proc_linkup(&proc0, &ksegrp0, &thread0);
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thread0.td_frame = &frame0;
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/*
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* Set up per-cpu data.
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*/
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pc = (struct pcpu *)(pcpu0 + PAGE_SIZE) - 1;
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pcpu_init(pc, 0, sizeof(struct pcpu));
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pc->pc_curthread = &thread0;
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pc->pc_curpcb = thread0.td_pcb;
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pc->pc_cpuid = 0;
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/* pc->pc_mid = mid; */
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__asm __volatile("mtsprg 0, %0" :: "r"(pc));
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mutex_init();
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/*
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* Initialize the console before printing anything.
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*/
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cninit();
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/*
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* Complain if there is no metadata.
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*/
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if (mdp == NULL || kmdp == NULL) {
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printf("powerpc_init: no loader metadata.\n");
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}
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kdb_init();
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/*
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* XXX: Initialize the interrupt tables.
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* Disable translation in case the vector area
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* hasn't been mapped (G5)
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*/
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mtmsr(mfmsr() & ~(PSL_IR | PSL_DR));
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isync();
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bcopy(&trapcode, (void *)EXC_RST, (size_t)&trapsize);
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bcopy(&trapcode, (void *)EXC_MCHK, (size_t)&trapsize);
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bcopy(&dsitrap, (void *)EXC_DSI, (size_t)&dsisize);
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bcopy(&trapcode, (void *)EXC_ISI, (size_t)&trapsize);
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bcopy(&trapcode, (void *)EXC_EXI, (size_t)&trapsize);
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bcopy(&trapcode, (void *)EXC_ALI, (size_t)&trapsize);
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bcopy(&trapcode, (void *)EXC_PGM, (size_t)&trapsize);
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bcopy(&trapcode, (void *)EXC_FPU, (size_t)&trapsize);
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bcopy(&trapcode, (void *)EXC_DECR, (size_t)&trapsize);
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bcopy(&trapcode, (void *)EXC_SC, (size_t)&trapsize);
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bcopy(&trapcode, (void *)EXC_TRC, (size_t)&trapsize);
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bcopy(&trapcode, (void *)EXC_FPA, (size_t)&trapsize);
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bcopy(&trapcode, (void *)EXC_THRM, (size_t)&trapsize);
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bcopy(&trapcode, (void *)EXC_BPT, (size_t)&trapsize);
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#ifdef KDB
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bcopy(&dblow, (void *)EXC_RST, (size_t)&dbsize);
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bcopy(&dblow, (void *)EXC_MCHK, (size_t)&dbsize);
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bcopy(&dblow, (void *)EXC_PGM, (size_t)&dbsize);
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bcopy(&dblow, (void *)EXC_TRC, (size_t)&dbsize);
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bcopy(&dblow, (void *)EXC_BPT, (size_t)&dbsize);
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#endif
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__syncicache(EXC_RSVD, EXC_LAST - EXC_RSVD);
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/*
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* Make sure translation has been enabled
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*/
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mtmsr(mfmsr() | PSL_IR|PSL_DR|PSL_ME|PSL_RI);
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isync();
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/*
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* Initialise virtual memory.
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*/
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pmap_bootstrap(startkernel, endkernel);
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/*
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* Initialize params/tunables that are derived from memsize
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*/
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init_param2(physmem);
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/*
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* Finish setting up thread0.
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*/
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thread0.td_kstack = kstack0;
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thread0.td_pcb = (struct pcb *)
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(thread0.td_kstack + KSTACK_PAGES * PAGE_SIZE) - 1;
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/*
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* Map and initialise the message buffer.
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*/
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for (off = 0; off < round_page(MSGBUF_SIZE); off += PAGE_SIZE)
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pmap_kenter((vm_offset_t)msgbufp + off, msgbuf_phys + off);
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msgbufinit(msgbufp, MSGBUF_SIZE);
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#ifdef KDB
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if (boothowto & RB_KDB)
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kdb_enter("Boot flags requested debugger");
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#endif
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}
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void
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bzero(void *buf, size_t len)
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{
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caddr_t p;
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p = buf;
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while (((vm_offset_t) p & (sizeof(u_long) - 1)) && len) {
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*p++ = 0;
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len--;
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}
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while (len >= sizeof(u_long) * 8) {
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*(u_long*) p = 0;
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*((u_long*) p + 1) = 0;
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*((u_long*) p + 2) = 0;
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*((u_long*) p + 3) = 0;
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len -= sizeof(u_long) * 8;
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*((u_long*) p + 4) = 0;
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*((u_long*) p + 5) = 0;
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*((u_long*) p + 6) = 0;
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*((u_long*) p + 7) = 0;
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p += sizeof(u_long) * 8;
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}
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while (len >= sizeof(u_long)) {
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*(u_long*) p = 0;
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len -= sizeof(u_long);
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p += sizeof(u_long);
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}
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while (len) {
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*p++ = 0;
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len--;
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}
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}
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void
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sendsig(sig_t catcher, int sig, sigset_t *mask, u_long code)
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{
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struct trapframe *tf;
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struct sigframe *sfp;
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struct sigacts *psp;
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struct sigframe sf;
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struct thread *td;
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struct proc *p;
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int oonstack, rndfsize;
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td = curthread;
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p = td->td_proc;
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PROC_LOCK_ASSERT(p, MA_OWNED);
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psp = p->p_sigacts;
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mtx_assert(&psp->ps_mtx, MA_OWNED);
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tf = td->td_frame;
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oonstack = sigonstack(tf->fixreg[1]);
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rndfsize = ((sizeof(sf) + 15) / 16) * 16;
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CTR4(KTR_SIG, "sendsig: td=%p (%s) catcher=%p sig=%d", td, p->p_comm,
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catcher, sig);
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/*
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* Save user context
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*/
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memset(&sf, 0, sizeof(sf));
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grab_mcontext(td, &sf.sf_uc.uc_mcontext, 0);
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sf.sf_uc.uc_sigmask = *mask;
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sf.sf_uc.uc_stack = td->td_sigstk;
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sf.sf_uc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK)
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? ((oonstack) ? SS_ONSTACK : 0) : SS_DISABLE;
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sf.sf_uc.uc_mcontext.mc_onstack = (oonstack) ? 1 : 0;
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/*
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* Allocate and validate space for the signal handler context.
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*/
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if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&
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SIGISMEMBER(psp->ps_sigonstack, sig)) {
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sfp = (struct sigframe *)((caddr_t)td->td_sigstk.ss_sp +
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td->td_sigstk.ss_size - rndfsize);
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} else {
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sfp = (struct sigframe *)(tf->fixreg[1] - rndfsize);
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}
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|
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/*
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* Translate the signal if appropriate (Linux emu ?)
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*/
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if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize)
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sig = p->p_sysent->sv_sigtbl[_SIG_IDX(sig)];
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|
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/*
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* Save the floating-point state, if necessary, then copy it.
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*/
|
|
/* XXX */
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|
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/*
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* Set up the registers to return to sigcode.
|
|
*
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* r1/sp - sigframe ptr
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* lr - sig function, dispatched to by blrl in trampoline
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* r3 - sig number
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* r4 - SIGINFO ? &siginfo : exception code
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* r5 - user context
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* srr0 - trampoline function addr
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*/
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tf->lr = (register_t)catcher;
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tf->fixreg[1] = (register_t)sfp;
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tf->fixreg[FIRSTARG] = sig;
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tf->fixreg[FIRSTARG+2] = (register_t)&sfp->sf_uc;
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|
if (SIGISMEMBER(psp->ps_siginfo, sig)) {
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/*
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* Signal handler installed with SA_SIGINFO.
|
|
*/
|
|
tf->fixreg[FIRSTARG+1] = (register_t)&sfp->sf_si;
|
|
|
|
/*
|
|
* Fill siginfo structure.
|
|
*/
|
|
sf.sf_si.si_signo = sig;
|
|
sf.sf_si.si_code = code;
|
|
sf.sf_si.si_addr = (void *)tf->srr0;
|
|
} else {
|
|
/* Old FreeBSD-style arguments. */
|
|
tf->fixreg[FIRSTARG+1] = code;
|
|
}
|
|
mtx_unlock(&psp->ps_mtx);
|
|
PROC_UNLOCK(p);
|
|
|
|
tf->srr0 = (register_t)(PS_STRINGS - *(p->p_sysent->sv_szsigcode));
|
|
|
|
/*
|
|
* copy the frame out to userland.
|
|
*/
|
|
if (copyout((caddr_t)&sf, (caddr_t)sfp, sizeof(sf)) != 0) {
|
|
/*
|
|
* Process has trashed its stack. Kill it.
|
|
*/
|
|
CTR2(KTR_SIG, "sendsig: sigexit td=%p sfp=%p", td, sfp);
|
|
PROC_LOCK(p);
|
|
sigexit(td, SIGILL);
|
|
}
|
|
|
|
CTR3(KTR_SIG, "sendsig: return td=%p pc=%#x sp=%#x", td,
|
|
tf->srr0, tf->fixreg[1]);
|
|
|
|
PROC_LOCK(p);
|
|
mtx_lock(&psp->ps_mtx);
|
|
}
|
|
|
|
/*
|
|
* Build siginfo_t for SA thread
|
|
*/
|
|
void
|
|
cpu_thread_siginfo(int sig, u_long code, siginfo_t *si)
|
|
{
|
|
struct proc *p;
|
|
struct thread *td;
|
|
|
|
td = curthread;
|
|
p = td->td_proc;
|
|
PROC_LOCK_ASSERT(p, MA_OWNED);
|
|
|
|
bzero(si, sizeof(*si));
|
|
si->si_signo = sig;
|
|
si->si_code = code;
|
|
/* XXXKSE fill other fields */
|
|
}
|
|
|
|
int
|
|
sigreturn(struct thread *td, struct sigreturn_args *uap)
|
|
{
|
|
struct proc *p;
|
|
ucontext_t uc;
|
|
int error;
|
|
|
|
CTR2(KTR_SIG, "sigreturn: td=%p ucp=%p", td, uap->sigcntxp);
|
|
|
|
if (copyin(uap->sigcntxp, &uc, sizeof(uc)) != 0) {
|
|
CTR1(KTR_SIG, "sigreturn: efault td=%p", td);
|
|
return (EFAULT);
|
|
}
|
|
|
|
error = set_mcontext(td, &uc.uc_mcontext);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
p = td->td_proc;
|
|
PROC_LOCK(p);
|
|
td->td_sigmask = uc.uc_sigmask;
|
|
SIG_CANTMASK(td->td_sigmask);
|
|
signotify(td);
|
|
PROC_UNLOCK(p);
|
|
|
|
CTR3(KTR_SIG, "sigreturn: return td=%p pc=%#x sp=%#x",
|
|
td, uc.uc_mcontext.mc_srr0, uc.uc_mcontext.mc_gpr[1]);
|
|
|
|
return (EJUSTRETURN);
|
|
}
|
|
|
|
#ifdef COMPAT_FREEBSD4
|
|
int
|
|
freebsd4_sigreturn(struct thread *td, struct freebsd4_sigreturn_args *uap)
|
|
{
|
|
|
|
return sigreturn(td, (struct sigreturn_args *)uap);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Construct a PCB from a trapframe. This is called from kdb_trap() where
|
|
* we want to start a backtrace from the function that caused us to enter
|
|
* the debugger. We have the context in the trapframe, but base the trace
|
|
* on the PCB. The PCB doesn't have to be perfect, as long as it contains
|
|
* enough for a backtrace.
|
|
*/
|
|
void
|
|
makectx(struct trapframe *tf, struct pcb *pcb)
|
|
{
|
|
|
|
pcb->pcb_lr = tf->srr0;
|
|
pcb->pcb_sp = tf->fixreg[1];
|
|
}
|
|
|
|
/*
|
|
* get_mcontext/sendsig helper routine that doesn't touch the
|
|
* proc lock
|
|
*/
|
|
static int
|
|
grab_mcontext(struct thread *td, mcontext_t *mcp, int flags)
|
|
{
|
|
struct pcb *pcb;
|
|
|
|
pcb = td->td_pcb;
|
|
|
|
memset(mcp, 0, sizeof(mcontext_t));
|
|
|
|
mcp->mc_vers = _MC_VERSION;
|
|
mcp->mc_flags = 0;
|
|
memcpy(&mcp->mc_frame, td->td_frame, sizeof(struct trapframe));
|
|
if (flags & GET_MC_CLEAR_RET) {
|
|
mcp->mc_gpr[3] = 0;
|
|
mcp->mc_gpr[4] = 0;
|
|
}
|
|
|
|
/*
|
|
* This assumes that floating-point context is *not* lazy,
|
|
* so if the thread has used FP there would have been a
|
|
* FP-unavailable exception that would have set things up
|
|
* correctly.
|
|
*/
|
|
if (pcb->pcb_flags & PCB_FPU) {
|
|
KASSERT(td == curthread,
|
|
("get_mcontext: fp save not curthread"));
|
|
critical_enter();
|
|
save_fpu(td);
|
|
critical_exit();
|
|
mcp->mc_flags |= _MC_FP_VALID;
|
|
memcpy(&mcp->mc_fpscr, &pcb->pcb_fpu.fpscr, sizeof(double));
|
|
memcpy(mcp->mc_fpreg, pcb->pcb_fpu.fpr, 32*sizeof(double));
|
|
}
|
|
|
|
/* XXX Altivec context ? */
|
|
|
|
mcp->mc_len = sizeof(*mcp);
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
get_mcontext(struct thread *td, mcontext_t *mcp, int flags)
|
|
{
|
|
int error;
|
|
|
|
error = grab_mcontext(td, mcp, flags);
|
|
if (error == 0) {
|
|
PROC_LOCK(curthread->td_proc);
|
|
mcp->mc_onstack = sigonstack(td->td_frame->fixreg[1]);
|
|
PROC_UNLOCK(curthread->td_proc);
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
int
|
|
set_mcontext(struct thread *td, const mcontext_t *mcp)
|
|
{
|
|
struct pcb *pcb;
|
|
struct trapframe *tf;
|
|
|
|
pcb = td->td_pcb;
|
|
tf = td->td_frame;
|
|
|
|
if (mcp->mc_vers != _MC_VERSION ||
|
|
mcp->mc_len != sizeof(*mcp))
|
|
return (EINVAL);
|
|
|
|
/*
|
|
* Don't let the user set privileged MSR bits
|
|
*/
|
|
if ((mcp->mc_srr1 & PSL_USERSTATIC) != (tf->srr1 & PSL_USERSTATIC)) {
|
|
return (EINVAL);
|
|
}
|
|
|
|
memcpy(tf, mcp->mc_frame, sizeof(mcp->mc_frame));
|
|
|
|
if (mcp->mc_flags & _MC_FP_VALID) {
|
|
if ((pcb->pcb_flags & PCB_FPU) != PCB_FPU) {
|
|
critical_enter();
|
|
enable_fpu(td);
|
|
critical_exit();
|
|
}
|
|
memcpy(&pcb->pcb_fpu.fpscr, &mcp->mc_fpscr, sizeof(double));
|
|
memcpy(pcb->pcb_fpu.fpr, mcp->mc_fpreg, 32*sizeof(double));
|
|
}
|
|
|
|
/* XXX Altivec context? */
|
|
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
cpu_boot(int howto)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* Shutdown the CPU as much as possible.
|
|
*/
|
|
void
|
|
cpu_halt(void)
|
|
{
|
|
|
|
OF_exit();
|
|
}
|
|
|
|
void
|
|
cpu_idle(void)
|
|
{
|
|
/* Insert code to halt (until next interrupt) for the idle loop */
|
|
}
|
|
|
|
/*
|
|
* Set set up registers on exec.
|
|
*/
|
|
void
|
|
exec_setregs(struct thread *td, u_long entry, u_long stack, u_long ps_strings)
|
|
{
|
|
struct trapframe *tf;
|
|
struct ps_strings arginfo;
|
|
|
|
tf = trapframe(td);
|
|
bzero(tf, sizeof *tf);
|
|
tf->fixreg[1] = -roundup(-stack + 8, 16);
|
|
|
|
/*
|
|
* XXX Machine-independent code has already copied arguments and
|
|
* XXX environment to userland. Get them back here.
|
|
*/
|
|
(void)copyin((char *)PS_STRINGS, &arginfo, sizeof(arginfo));
|
|
|
|
/*
|
|
* Set up arguments for _start():
|
|
* _start(argc, argv, envp, obj, cleanup, ps_strings);
|
|
*
|
|
* Notes:
|
|
* - obj and cleanup are the auxilliary and termination
|
|
* vectors. They are fixed up by ld.elf_so.
|
|
* - ps_strings is a NetBSD extention, and will be
|
|
* ignored by executables which are strictly
|
|
* compliant with the SVR4 ABI.
|
|
*
|
|
* XXX We have to set both regs and retval here due to different
|
|
* XXX calling convention in trap.c and init_main.c.
|
|
*/
|
|
/*
|
|
* XXX PG: these get overwritten in the syscall return code.
|
|
* execve() should return EJUSTRETURN, like it does on NetBSD.
|
|
* Emulate by setting the syscall return value cells. The
|
|
* registers still have to be set for init's fork trampoline.
|
|
*/
|
|
td->td_retval[0] = arginfo.ps_nargvstr;
|
|
td->td_retval[1] = (register_t)arginfo.ps_argvstr;
|
|
tf->fixreg[3] = arginfo.ps_nargvstr;
|
|
tf->fixreg[4] = (register_t)arginfo.ps_argvstr;
|
|
tf->fixreg[5] = (register_t)arginfo.ps_envstr;
|
|
tf->fixreg[6] = 0; /* auxillary vector */
|
|
tf->fixreg[7] = 0; /* termination vector */
|
|
tf->fixreg[8] = (register_t)PS_STRINGS; /* NetBSD extension */
|
|
|
|
tf->srr0 = entry;
|
|
tf->srr1 = PSL_MBO | PSL_USERSET | PSL_FE_DFLT;
|
|
td->td_pcb->pcb_flags = 0;
|
|
}
|
|
|
|
int
|
|
fill_regs(struct thread *td, struct reg *regs)
|
|
{
|
|
struct trapframe *tf;
|
|
|
|
tf = td->td_frame;
|
|
memcpy(regs, tf, sizeof(struct reg));
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
fill_dbregs(struct thread *td, struct dbreg *dbregs)
|
|
{
|
|
/* No debug registers on PowerPC */
|
|
return (ENOSYS);
|
|
}
|
|
|
|
int
|
|
fill_fpregs(struct thread *td, struct fpreg *fpregs)
|
|
{
|
|
struct pcb *pcb;
|
|
|
|
pcb = td->td_pcb;
|
|
|
|
if ((pcb->pcb_flags & PCB_FPU) == 0)
|
|
memset(fpregs, 0, sizeof(struct fpreg));
|
|
else
|
|
memcpy(fpregs, &pcb->pcb_fpu, sizeof(struct fpreg));
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
set_regs(struct thread *td, struct reg *regs)
|
|
{
|
|
struct trapframe *tf;
|
|
|
|
tf = td->td_frame;
|
|
memcpy(tf, regs, sizeof(struct reg));
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
set_dbregs(struct thread *td, struct dbreg *dbregs)
|
|
{
|
|
/* No debug registers on PowerPC */
|
|
return (ENOSYS);
|
|
}
|
|
|
|
int
|
|
set_fpregs(struct thread *td, struct fpreg *fpregs)
|
|
{
|
|
struct pcb *pcb;
|
|
|
|
pcb = td->td_pcb;
|
|
if ((pcb->pcb_flags & PCB_FPU) == 0)
|
|
enable_fpu(td);
|
|
memcpy(&pcb->pcb_fpu, fpregs, sizeof(struct fpreg));
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
ptrace_set_pc(struct thread *td, unsigned long addr)
|
|
{
|
|
struct trapframe *tf;
|
|
|
|
tf = td->td_frame;
|
|
tf->srr0 = (register_t)addr;
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
ptrace_single_step(struct thread *td)
|
|
{
|
|
struct trapframe *tf;
|
|
|
|
tf = td->td_frame;
|
|
tf->srr1 |= PSL_SE;
|
|
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
ptrace_clear_single_step(struct thread *td)
|
|
{
|
|
struct trapframe *tf;
|
|
|
|
tf = td->td_frame;
|
|
tf->srr1 &= ~PSL_SE;
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Initialise a struct pcpu.
|
|
*/
|
|
void
|
|
cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t sz)
|
|
{
|
|
|
|
}
|
|
|
|
/*
|
|
* kcopy(const void *src, void *dst, size_t len);
|
|
*
|
|
* Copy len bytes from src to dst, aborting if we encounter a fatal
|
|
* page fault.
|
|
*
|
|
* kcopy() _must_ save and restore the old fault handler since it is
|
|
* called by uiomove(), which may be in the path of servicing a non-fatal
|
|
* page fault.
|
|
*/
|
|
int
|
|
kcopy(const void *src, void *dst, size_t len)
|
|
{
|
|
struct thread *td;
|
|
faultbuf env, *oldfault;
|
|
int rv;
|
|
|
|
td = PCPU_GET(curthread);
|
|
oldfault = td->td_pcb->pcb_onfault;
|
|
if ((rv = setfault(env)) != 0) {
|
|
td->td_pcb->pcb_onfault = oldfault;
|
|
return rv;
|
|
}
|
|
|
|
memcpy(dst, src, len);
|
|
|
|
td->td_pcb->pcb_onfault = oldfault;
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
asm_panic(char *pstr)
|
|
{
|
|
panic(pstr);
|
|
}
|
|
|
|
int db_trap_glue(struct trapframe *); /* Called from trap_subr.S */
|
|
|
|
int
|
|
db_trap_glue(struct trapframe *frame)
|
|
{
|
|
if (!(frame->srr1 & PSL_PR)
|
|
&& (frame->exc == EXC_TRC || frame->exc == EXC_RUNMODETRC
|
|
|| (frame->exc == EXC_PGM
|
|
&& (frame->srr1 & 0x20000))
|
|
|| frame->exc == EXC_BPT
|
|
|| frame->exc == EXC_DSI)) {
|
|
int type = frame->exc;
|
|
if (type == EXC_PGM && (frame->srr1 & 0x20000)) {
|
|
type = T_BREAKPOINT;
|
|
}
|
|
return (kdb_trap(type, 0, frame));
|
|
}
|
|
|
|
return (0);
|
|
}
|