diff options
Diffstat (limited to 'sys/arch/hp300/hp300/db_memrw.c')
| -rw-r--r-- | sys/arch/hp300/hp300/db_memrw.c | 207 |
1 files changed, 0 insertions, 207 deletions
diff --git a/sys/arch/hp300/hp300/db_memrw.c b/sys/arch/hp300/hp300/db_memrw.c deleted file mode 100644 index 94946da45a7..00000000000 --- a/sys/arch/hp300/hp300/db_memrw.c +++ /dev/null @@ -1,207 +0,0 @@ -/* $OpenBSD: db_memrw.c,v 1.11 2011/11/01 21:20:55 miod Exp $ */ -/* $NetBSD: db_memrw.c,v 1.5 1997/06/10 18:48:47 veego Exp $ */ - -/*- - * Copyright (c) 1996 The NetBSD Foundation, Inc. - * All rights reserved. - * - * This code is derived from software contributed to The NetBSD Foundation - * by Gordon W. Ross and Jason R. Thorpe. - * - * 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. - * - * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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. - */ - -/* - * Interface to the debugger for virtual memory read/write. - * This file is shared by DDB and KGDB, and must work even - * when only KGDB is included (thus no db_printf calls). - * - * To write in the text segment, we have to first make - * the page writable, do the write, then restore the PTE. - * For writes outside the text segment, and all reads, - * just do the access -- if it causes a fault, the debugger - * will recover with a longjmp to an appropriate place. - * - * ALERT! If you want to access device registers with a - * specific size, then the read/write functions have to - * make sure to do the correct sized pointer access. - * - * Modified from sun3 version for hp300 (and probably other m68ks, too) - * by Jason R. Thorpe <thorpej@NetBSD.ORG>. - */ - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/proc.h> - -#include <uvm/uvm_extern.h> - -#include <machine/pte.h> -#include <machine/db_machdep.h> -#include <machine/cpu.h> - -#include <ddb/db_access.h> - -static void db_write_text(db_addr_t, size_t, char *); - -/* - * Read bytes from kernel address space for debugger. - * This used to check for valid PTEs, but now that - * traps in DDB work correctly, "Just Do It!" - */ -void -db_read_bytes(addr, size, data) - db_addr_t addr; - size_t size; - char *data; -{ - char *src = (char *)addr; - - if (size == 4) { - *((int *)data) = *((int *)src); - return; - } - - if (size == 2) { - *((short *)data) = *((short *)src); - return; - } - - while (size > 0) { - --size; - *data++ = *src++; - } -} - -/* - * Write bytes somewhere in kernel text. - * Makes text page writable temporarily. - * We're probably a little to cache-paranoid. - */ -static void -db_write_text(addr, size, data) - db_addr_t addr; - size_t size; - char *data; -{ - char *dst, *odst; - pt_entry_t *pte, oldpte, tmppte; - vaddr_t pgva; - int limit; - - if (size == 0) - return; - - dst = (char *)addr; - - do { - /* - * Get the VA for the page. - */ - pgva = trunc_page((vaddr_t)dst); - - /* - * Save this destination address, for TLB - * flush. - */ - odst = dst; - - /* - * Compute number of bytes that can be written - * with this mapping and subtract it from the - * total size. - */ - limit = NBPG - ((u_long)dst & PGOFSET); - if (limit > size) - limit = size; - size -= limit; - - /* - * Make the page writable. Note the mapping is - * cache-inhibited to save hair. - */ - pte = kvtopte(pgva); - oldpte = *pte; - - if ((oldpte & PG_V) == 0) { - printf(" address %p not a valid page\n", dst); - return; - } - - tmppte = (oldpte & ~PG_RO) | PG_RW | PG_CI; - *pte = tmppte; - TBIS((vaddr_t)odst); - - /* - * Page is now writable. Do as much access as we - * can in this page. - */ - for (; limit > 0; limit--) - *dst++ = *data++; - - /* - * Restore the old PTE. - */ - *pte = oldpte; - TBIS((vaddr_t)odst); - } while (size != 0); - - /* - * Invalidate the instruction cache so our changes - * take effect. - */ - ICIA(); -} - -/* - * Write bytes to kernel address space for debugger. - */ -extern char kernel_text[], etext[]; -void -db_write_bytes(addr, size, data) - db_addr_t addr; - size_t size; - char *data; -{ - char *dst = (char *)addr; - - /* If any part is in kernel text, use db_write_text() */ - if ((dst < etext) && ((dst + size) > kernel_text)) { - db_write_text(addr, size, data); - return; - } - - if (size == 4) { - *((int *)dst) = *((int *)data); - return; - } - - if (size == 2) { - *((short *)dst) = *((short *)data); - return; - } - - while (size > 0) { - --size; - *dst++ = *data++; - } -} |