/*- * Copyright (c) 1989, 1992 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. Modified for MIPS by Ralph Campbell. * * %sccs.include.redist.c% */ #if defined(LIBC_SCCS) && !defined(lint) static char sccsid[] = "@(#)kvm_mips.c 1.1 (Berkeley) 02/04/93"; #endif /* LIBC_SCCS and not lint */ /* * MIPS machine dependent routines for kvm. Hopefully, the forthcoming * vm code will one day obsolete this module. */ #include #include #include #include #include #include #include #include #include #include #include #include "kvm_private.h" #include #include #include #define KREAD(kd, addr, p)\ (kvm_read(kd, addr, (char *)(p), sizeof(*(p))) != sizeof(*(p))) void _kvm_freevtop(kd) kvm_t *kd; { } int _kvm_initvtop(kd) kvm_t *kd; { return (0); } /* * Translate a kernel virtual address to a physical address. */ int _kvm_kvatop(kd, va, pa) kvm_t *kd; u_long va; u_long *pa; { u_long pte, addr, offset; if (va < KERNBASE || va >= VM_MIN_KERNEL_ADDRESS + PMAP_HASH_KPAGES * NPTEPG * NBPG) goto invalid; if (va < VM_MIN_KERNEL_ADDRESS) { *pa = MACH_CACHED_TO_PHYS(va); return (NBPG - (va & PGOFSET)); } addr = PMAP_HASH_KADDR + ((va - VM_MIN_KERNEL_ADDRESS) >> PGSHIFT); /* * Can't use KREAD to read kernel segment table entries. * Fortunately it is 1-to-1 mapped so we don't have to. */ if (lseek(kd->pmfd, (off_t)addr, 0) < 0 || read(kd->pmfd, (char *)&pte, sizeof(pte)) < 0) goto invalid; offset = va & PGOFSET; *pa = (pte & PG_FRAME) | offset; return (NBPG - offset); invalid: _kvm_err(kd, 0, "invalid address (%x)", va); return (0); } /* * 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; { #if 0 register struct vmspace *vms = p->p_vmspace; u_long stab_kva, kva; kva = (u_long)&vms->vm_pmap.pm_stab; if (kvm_read(kd, kva, (char *)&kva, 4) != 4) { _kvm_err(kd, 0, "invalid address (%x)", va); return (0); } return (_kvm_vatop(kd, kva, va, pa)); #else _kvm_err(kd, 0, "invalid address (%x)", va); return (0); #endif }