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File: [cvs.NetBSD.org] / src / lib / libkvm / kvm_sparc64.c (download)

Revision 1.17, Fri Feb 21 18:00:09 2014 UTC (6 years, 3 months ago) by palle
Branch: MAIN
CVS Tags: yamt-pagecache-base9, tls-maxphys-base, tls-earlyentropy-base, tls-earlyentropy, riastradh-xf86-video-intel-2-7-1-pre-2-21-15, riastradh-drm2-base3, prg-localcount2-base3, prg-localcount2-base2, prg-localcount2-base1, prg-localcount2-base, prg-localcount2, phil-wifi-base, phil-wifi-20200421, phil-wifi-20200411, phil-wifi-20200406, phil-wifi-20191119, phil-wifi-20190609, phil-wifi, pgoyette-localcount-base, pgoyette-localcount-20170426, pgoyette-localcount-20170320, pgoyette-localcount-20170107, pgoyette-localcount-20161104, pgoyette-localcount-20160806, pgoyette-localcount-20160726, pgoyette-localcount, pgoyette-compat-merge-20190127, pgoyette-compat-base, pgoyette-compat-20190127, pgoyette-compat-20190118, pgoyette-compat-1226, pgoyette-compat-1126, pgoyette-compat-1020, pgoyette-compat-0930, pgoyette-compat-0906, pgoyette-compat-0728, pgoyette-compat-0625, pgoyette-compat-0521, pgoyette-compat-0502, pgoyette-compat-0422, pgoyette-compat-0415, pgoyette-compat-0407, pgoyette-compat-0330, pgoyette-compat-0322, pgoyette-compat-0315, pgoyette-compat, perseant-stdc-iso10646-base, perseant-stdc-iso10646, netbsd-9-base, netbsd-9-0-RELEASE, netbsd-9-0-RC2, netbsd-9-0-RC1, netbsd-9, netbsd-8-base, netbsd-8-2-RELEASE, netbsd-8-1-RELEASE, netbsd-8-1-RC1, netbsd-8-0-RELEASE, netbsd-8-0-RC2, netbsd-8-0-RC1, netbsd-8, netbsd-7-nhusb-base-20170116, netbsd-7-nhusb-base, netbsd-7-nhusb, netbsd-7-base, netbsd-7-2-RELEASE, netbsd-7-1-RELEASE, netbsd-7-1-RC2, netbsd-7-1-RC1, netbsd-7-1-2-RELEASE, netbsd-7-1-1-RELEASE, netbsd-7-1, netbsd-7-0-RELEASE, netbsd-7-0-RC3, netbsd-7-0-RC2, netbsd-7-0-RC1, netbsd-7-0-2-RELEASE, netbsd-7-0-1-RELEASE, netbsd-7-0, netbsd-7, matt-nb8-mediatek-base, matt-nb8-mediatek, localcount-20160914, is-mlppp-base, is-mlppp, bouyer-socketcan-base1, bouyer-socketcan-base, bouyer-socketcan, HEAD
Changes since 1.16: +4 -3 lines

sun4v: Rename TLB_ defines to SUN4U_TLB_ so entries created using TSB_DATA() are properly setup for sun4u and sun4v. Relocate the cputyp variable from autoconf.c to locore.s and make it const in param.h so optimized code can be generated. Parts from OpenBSD. Optimization suggested by nakayama@. OK martin@, mrg@, nakayama@

/*	$NetBSD: kvm_sparc64.c,v 1.17 2014/02/21 18:00:09 palle Exp $	*/

/*-
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software developed by the Computer Systems
 * Engineering group at Lawrence Berkeley Laboratory under DARPA contract
 * BG 91-66 and contributed to Berkeley.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)kvm_sparc.c	8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: kvm_sparc64.c,v 1.17 2014/02/21 18:00:09 palle Exp $");
#endif
#endif /* LIBC_SCCS and not lint */

/*
 * Sparc machine dependent routines for kvm.  Hopefully, the forthcoming
 * vm code will one day obsolete this module.
 */

#include <sys/param.h>
#include <sys/exec.h>
#include <sys/proc.h>
#include <sys/stat.h>
#include <sys/core.h>
#include <sys/kcore.h>
#include <sys/types.h>

#include <unistd.h>
#include <nlist.h>
#include <kvm.h>

#include <uvm/uvm_extern.h>

#include <machine/pmap.h>
#include <machine/kcore.h>
#include <machine/vmparam.h>
#include <machine/param.h>

#include <limits.h>
#include <db.h>

#include "kvm_private.h"

void
_kvm_freevtop(kvm_t *kd)
{
	if (kd->vmst != 0) {
		_kvm_err(kd, kd->program, "_kvm_freevtop: internal error");
		kd->vmst = 0;
	}
}

/*
 * Prepare for translation of kernel virtual addresses into offsets
 * into crash dump files. We use the MMU specific goop written at the
 * front of the crash dump by pmap_dumpmmu().
 *
 * We should read in and cache the ksegs here to speed up operations...
 */
int
_kvm_initvtop(kvm_t *kd)
{
	kd->nbpg = 0x2000;

	return (0);
}

/*
 * Translate a kernel virtual address to a physical address using the
 * mapping information in kd->vm.  Returns the result in pa, and returns
 * the number of bytes that are contiguously available from this
 * physical address.  This routine is used only for crash dumps.
 */
int
_kvm_kvatop(kvm_t *kd, vaddr_t va, paddr_t *pa)
{
	cpu_kcore_hdr_t *cpup = kd->cpu_data;
	u_long kernbase = cpup->kernbase;
	uint64_t *pseg, *pdir, *ptbl;
	struct cpu_kcore_4mbseg *ktlb;
	int64_t data;
	int i;

	if (va < kernbase)
		goto lose;

	/* Handle the wired 4MB TTEs and per-CPU mappings */
	if (cpup->memsegoffset > sizeof(cpu_kcore_hdr_t) &&
	    cpup->newmagic == SPARC64_KCORE_NEWMAGIC) {
		/*
		 * new format: we have a list of 4 MB mappings
		 */
		ktlb = (struct cpu_kcore_4mbseg *)
			((uintptr_t)kd->cpu_data + cpup->off4mbsegs);
		for (i = 0; i < cpup->num4mbsegs; i++) {
			uint64_t start = ktlb[i].va;
			if (va < start || va >= start+PAGE_SIZE_4M)
				continue;
			*pa = ktlb[i].pa + va - start;
			return (int)(start+PAGE_SIZE_4M - va);
		}

		if (cpup->numcpuinfos > 0) {
			/* we have per-CPU mapping info */
			uint64_t start, base;

			base = cpup->cpubase - 32*1024;
			if (va >= base && va < (base + cpup->percpusz)) {
				start = va - base;
				*pa = cpup->cpusp
				    + cpup->thiscpu*cpup->percpusz
				    + start;
				return cpup->percpusz - start;
			}
		}
	} else {
		/*
		 * old format: just a textbase/size and database/size
		 */
		if (va > cpup->ktextbase && va < 
		    (cpup->ktextbase + cpup->ktextsz)) {
			u_long vaddr;

			vaddr = va - cpup->ktextbase;
			*pa = cpup->ktextp + vaddr;
			return (int)(cpup->ktextsz - vaddr);
		}
		if (va > cpup->kdatabase && va < 
		    (cpup->kdatabase + cpup->kdatasz)) {
			u_long vaddr;

			vaddr = va - cpup->kdatabase;
			*pa = cpup->kdatap + vaddr;
			return (int)(cpup->kdatasz - vaddr);
		}
	}

	/*
	 * Parse kernel page table.
	 */
	pseg = (uint64_t *)(u_long)cpup->segmapoffset;
	if (_kvm_pread(kd, kd->pmfd, &pdir, sizeof(pdir),
		_kvm_pa2off(kd, (paddr_t)&pseg[va_to_seg(va)])) 
		!= sizeof(pdir)) {
		_kvm_syserr(kd, 0, "could not read L1 PTE");
		goto lose;
	}

	if (!pdir) {
		_kvm_err(kd, 0, "invalid L1 PTE");
		goto lose;
	}

	if (_kvm_pread(kd, kd->pmfd, &ptbl, sizeof(ptbl),
		_kvm_pa2off(kd, (paddr_t)&pdir[va_to_dir(va)])) 
		!= sizeof(ptbl)) {
		_kvm_syserr(kd, 0, "could not read L2 PTE");
		goto lose;
	}

	if (!ptbl) {
		_kvm_err(kd, 0, "invalid L2 PTE");
		goto lose;
	}

	if (_kvm_pread(kd, kd->pmfd, &data, sizeof(data),
		_kvm_pa2off(kd, (paddr_t)&ptbl[va_to_pte(va)])) 
		!= sizeof(data)) {
		_kvm_syserr(kd, 0, "could not read TTE");
		goto lose;
	}

	if (data >= 0) {
		_kvm_err(kd, 0, "invalid L2 TTE");
		goto lose;
	}
	
	/* 
	 * Calculate page offsets and things.
	 *
	 * XXXX -- We could support multiple page sizes.
	 */
	va = va & (kd->nbpg - 1);
	data &= SUN4U_TLB_PA_MASK; /* XXX handle sun4u/sun4v */
	*pa = data + va;

	/*
	 * Parse and trnslate our TTE.
	 */

	return (int)(kd->nbpg - va);

lose:
	*pa = (u_long)-1;
	_kvm_err(kd, 0, "invalid address (%#"PRIxVADDR")", va);
	return (0);
}


/*
 * Translate a physical address to a file-offset in the crash dump.
 */
off_t
_kvm_pa2off(kvm_t *kd, paddr_t pa)
{
	cpu_kcore_hdr_t *cpup = kd->cpu_data;
	phys_ram_seg_t *mp;
	off_t off;
	int nmem;

	/*
	 * Layout of CPU segment:
	 *	cpu_kcore_hdr_t;
	 *	[alignment]
	 *	phys_ram_seg_t[cpup->nmemseg];
	 */
	mp = (phys_ram_seg_t *)((long)kd->cpu_data + cpup->memsegoffset);
	off = 0;

	/* Translate (sparse) pfnum to (packed) dump offset */
	for (nmem = cpup->nmemseg; --nmem >= 0; mp++) {
		if (mp->start <= pa && pa < mp->start + mp->size)
			break;
		off += mp->size;
	}
	if (nmem < 0) {
		_kvm_err(kd, 0, "invalid address (%#"PRIxPADDR")", pa);
		return (-1);
	}

	return (kd->dump_off + off + pa - mp->start);
}

/*
 * Machine-dependent initialization for ALL open kvm descriptors,
 * not just those for a kernel crash dump.  Some architectures
 * have to deal with these NOT being constants!  (i.e. m68k)
 */
int
_kvm_mdopen(kvm_t *kd)
{
	u_long max_uva;
	extern struct ps_strings *__ps_strings;

	max_uva = (u_long) (__ps_strings + 1);
	kd->usrstack = max_uva;
	kd->max_uva  = max_uva;
	kd->min_uva  = 0;

	return (0);
}