[BACK]Return to db_memrw.c CVS log [TXT][DIR] Up to [cvs.NetBSD.org] / src / sys / arch / sh3 / sh3

File: [cvs.NetBSD.org] / src / sys / arch / sh3 / sh3 / db_memrw.c (download)

Revision 1.1, Mon Sep 13 10:31:28 1999 UTC (21 years, 4 months ago) by itojun
Branch: MAIN
CVS Tags: wrstuden-devbsize-base, wrstuden-devbsize-19991221, wrstuden-devbsize, netbsd-1-5-base, netbsd-1-5-RELEASE, netbsd-1-5-PATCH003, netbsd-1-5-PATCH002, netbsd-1-5-PATCH001, netbsd-1-5-BETA2, netbsd-1-5-BETA, netbsd-1-5-ALPHA2, netbsd-1-5, minoura-xpg4dl-base, minoura-xpg4dl, fvdl-softdep-base, fvdl-softdep, comdex-fall-1999-base, comdex-fall-1999, chs-ubc2-newbase
Branch point for: thorpej_scsipi

Merge in NetBSD/sh3 from cvs.kame.net repository.

Tree structure:
- sys/arch/sh3: sh3 generic code
	As commented, in-chip device drivers are put into sys/arch/sh3/dev.
- sys/arch/evbsh3: sh3 evaluation boards (pure sh3 CPU, no fancy external HW)
- sys/arch/mmeye: Brains mmEye, www.brains.co.jp
MI source code includes couple of #ifdef for sh3-coff support.
(sh3 uses coff or elf)

Needs some more improvements, especialy in sys/arch/sh3/conf/files.sh3,
to compile the tree (due to last minute tree structure change).

/*	$NetBSD: db_memrw.c,v 1.1 1999/09/13 10:31:28 itojun Exp $	*/

/*
 * Mach Operating System
 * Copyright (c) 1991,1990 Carnegie Mellon University
 * All Rights Reserved.
 *
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 *
 *	db_interface.c,v 2.4 1991/02/05 17:11:13 mrt (CMU)
 */

/*
 * Routines to read and write memory on behalf of the debugger, used
 * by DDB and KGDB.
 */

#include <sys/param.h>
#include <sys/proc.h>
#include <sys/systm.h>

#include <vm/vm.h>

#include <machine/db_machdep.h>

#include <ddb/db_access.h>

/*
 * Read bytes from kernel address space for debugger.
 */
void
db_read_bytes(addr, size, data)
	vaddr_t		addr;
	register size_t	size;
	register char	*data;
{
	register char	*src;

	src = (char *)addr;
	while (size-- > 0)
		*data++ = *src++;
}

#if !defined(PMAP_NEW)
pt_entry_t *pmap_pte __P((pmap_t, vaddr_t));
#endif

/*
 * Write bytes to kernel address space for debugger.
 */
void
db_write_bytes(addr, size, data)
	vaddr_t		addr;
	register size_t	size;
	register char	*data;
{
	register char	*dst;

	register pt_entry_t *ptep0 = 0;
	pt_entry_t	oldmap0 = { 0 };
	vaddr_t		addr1;
	register pt_entry_t *ptep1 = 0;
	pt_entry_t	oldmap1 = { 0 };
	extern char	etext;

	if (addr >= VM_MIN_KERNEL_ADDRESS &&
	    addr < (vaddrt_t)&etext) {
		ptep0 = pmap_pte(pmap_kernel(), addr);
		oldmap0 = *ptep0;
		*(int *)ptep0 |= /* INTEL_PTE_WRITE */ PG_RW;

		addr1 = sh3_trunc_page(addr + size - 1);
		if (sh3_trunc_page(addr) != addr1) {
			/* data crosses a page boundary */
			ptep1 = pmap_pte(pmap_kernel(), addr1);
			oldmap1 = *ptep1;
			*(int *)ptep1 |= /* INTEL_PTE_WRITE */ PG_RW;
		}
		pmap_update();
	}

	dst = (char *)addr;

	while (size-- > 0)
		*dst++ = *data++;

	if (ptep0) {
		*ptep0 = oldmap0;
		if (ptep1)
			*ptep1 = oldmap1;
		pmap_update();
	}
}