1 files changed, 236 insertions, 0 deletions

diff --git a/lib/libkvm/kvm_sparc.c b/lib/libkvm/kvm_sparc.c
new file mode 100644
index 000000000000..5275068b6ea3
--- /dev/null
+++ b/lib/libkvm/kvm_sparc.c
@@ -0,0 +1,236 @@
+/*-
+ * 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. 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.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)kvm_sparc.c	8.1 (Berkeley) 6/4/93";
+#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/user.h>
+#include <sys/proc.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <nlist.h>
+#include <kvm.h>
+
+#include <vm/vm.h>
+#include <vm/vm_param.h>
+
+#include <limits.h>
+#include <db.h>
+
+#include "kvm_private.h"
+
+#define NPMEG 128
+
+/* XXX from sparc/pmap.c */
+#define MAXMEM  (128 * 1024 * 1024)     /* no more than 128 MB phys mem */
+#define NPGBANK 16                      /* 2^4 pages per bank (64K / bank) */
+#define BSHIFT  4                       /* log2(NPGBANK) */
+#define BOFFSET (NPGBANK - 1)
+#define BTSIZE  (MAXMEM / NBPG / NPGBANK)
+#define HWTOSW(pmap_stod, pg) (pmap_stod[(pg) >> BSHIFT] | ((pg) & BOFFSET))
+
+struct vmstate {
+	pmeg_t segmap[NKSEG];
+	int pmeg[NPMEG][NPTESG];
+	int pmap_stod[BTSIZE];              /* dense to sparse */
+};
+
+void
+_kvm_freevtop(kd)
+	kvm_t *kd;
+{
+	if (kd->vmst != 0)
+		free(kd->vmst);
+}
+
+int
+_kvm_initvtop(kd)
+	kvm_t *kd;
+{
+	register int i;
+	register int off;
+	register struct vmstate *vm;
+	struct stat st;
+	struct nlist nlist[2];
+
+	vm = (struct vmstate *)_kvm_malloc(kd, sizeof(*vm));
+	if (vm == 0)
+		return (-1);
+
+	kd->vmst = vm;
+
+	if (fstat(kd->pmfd, &st) < 0)
+		return (-1);
+	/*
+	 * Read segment table.
+	 */
+	off = st.st_size - ctob(btoc(sizeof(vm->segmap)));
+	errno = 0;
+	if (lseek(kd->pmfd, (off_t)off, 0) == -1 && errno != 0 || 
+	    read(kd->pmfd, (char *)vm->segmap, sizeof(vm->segmap)) < 0) {
+		_kvm_err(kd, kd->program, "cannot read segment map");
+		return (-1);
+	}
+	/*
+	 * Read PMEGs.
+	 */
+	off = st.st_size - ctob(btoc(sizeof(vm->pmeg)) +
+	    btoc(sizeof(vm->segmap)));
+	errno = 0;
+	if (lseek(kd->pmfd, (off_t)off, 0) == -1 && errno != 0 || 
+	    read(kd->pmfd, (char *)vm->pmeg, sizeof(vm->pmeg)) < 0) {
+		_kvm_err(kd, kd->program, "cannot read PMEG table");
+		return (-1);
+	}
+	/*
+	 * Make pmap_stod be an identity map so we can bootstrap it in.
+	 * We assume it's in the first contiguous chunk of physical memory.
+	 */
+	for (i = 0; i < BTSIZE; ++i) 
+		vm->pmap_stod[i] = i << 4;
+
+	/*
+	 * It's okay to do this nlist separately from the one kvm_getprocs()
+	 * does, since the only time we could gain anything by combining
+	 * them is if we do a kvm_getprocs() on a dead kernel, which is
+	 * not too common.
+	 */
+	nlist[0].n_name = "_pmap_stod";
+	nlist[1].n_name = 0;
+	if (kvm_nlist(kd, nlist) != 0) {
+		_kvm_err(kd, kd->program, "pmap_stod: no such symbol");
+		return (-1);
+	}
+	if (kvm_read(kd, (u_long)nlist[0].n_value, 
+		     (char *)vm->pmap_stod, sizeof(vm->pmap_stod))
+	    != sizeof(vm->pmap_stod)) {
+		_kvm_err(kd, kd->program, "cannot read pmap_stod");
+		return (-1);
+	}
+	return (0);
+}
+
+#define VA_OFF(va) (va & (NBPG - 1))
+
+/*
+ * Translate a user virtual address to a physical address.
+ */
+int
+_kvm_uvatop(kd, p, va, pa)
+	kvm_t *kd;
+	const struct proc *p;
+	u_long va;
+	u_long *pa;
+{
+	int kva, pte;
+	register int off, frame;
+	register struct vmspace *vms = p->p_vmspace;
+
+	if ((u_long)vms < KERNBASE) {
+		_kvm_err(kd, kd->program, "_kvm_uvatop: corrupt proc");
+		return (0);
+	}
+	if (va >= KERNBASE)
+		return (0);
+	/*
+	 * Get the PTE.  This takes two steps.  We read the
+	 * base address of the table, then we index it.
+	 * Note that the index pte table is indexed by
+	 * virtual segment rather than physical segment.
+	 */
+	kva = (u_long)&vms->vm_pmap.pm_rpte[VA_VSEG(va)];
+	if (kvm_read(kd, kva, (char *)&kva, 4) != 4 || kva == 0)
+		goto invalid;
+	kva += sizeof(vms->vm_pmap.pm_rpte[0]) * VA_VPG(va);
+	if (kvm_read(kd, kva, (char *)&pte, 4) == 4 && (pte & PG_V)) {
+		off = VA_OFF(va);
+		/*
+		 * /dev/mem adheres to the hardware model of physical memory
+		 * (with holes in the address space), while crashdumps
+		 * adhere to the contiguous software model.
+		 */
+		if (ISALIVE(kd))
+			frame = pte & PG_PFNUM;
+		else
+			frame = HWTOSW(kd->vmst->pmap_stod, pte & PG_PFNUM);
+		*pa = (frame << PGSHIFT) | off;		
+		return (NBPG - off);
+	}
+invalid:
+	_kvm_err(kd, 0, "invalid address (%x)", va);
+	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 crashdumps.
+ */
+int
+_kvm_kvatop(kd, va, pa)
+	kvm_t *kd;
+	u_long va;
+	u_long *pa;
+{
+	register struct vmstate *vm;
+	register int s;
+	register int pte;
+	register int off;
+
+	if (va >= KERNBASE) {
+		vm = kd->vmst;
+		s = vm->segmap[VA_VSEG(va) - NUSEG];
+		pte = vm->pmeg[s][VA_VPG(va)];
+		if ((pte & PG_V) != 0) {
+			off = VA_OFF(va);
+			*pa = (HWTOSW(vm->pmap_stod, pte & PG_PFNUM)
+			       << PGSHIFT) | off;
+
+			return (NBPG - off);
+		}
+	}
+	_kvm_err(kd, 0, "invalid address (%x)", va);
+	return (0);
+}