Initial import, 0.1 + pk 0.2.4-B1

1 files changed, 191 insertions, 0 deletions

diff --git a/sys/amd64/amd64/mem.c b/sys/amd64/amd64/mem.c
new file mode 100644
index 0000000..650e21e
--- /dev/null
+++ b/sys/amd64/amd64/mem.c
@@ -0,0 +1,191 @@
+/*-
+ * Copyright (c) 1988 University of Utah.
+ * Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * the Systems Programming Group of the University of Utah Computer
+ * Science Department, and code derived from software contributed to
+ * Berkeley by William Jolitz.
+ *
+ * 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.
+ *
+ * from: Utah $Hdr: mem.c 1.13 89/10/08$
+ *	@(#)mem.c	7.2 (Berkeley) 5/9/91
+ */
+
+/*
+ * Memory special file
+ */
+
+#include "param.h"
+#include "conf.h"
+#include "buf.h"
+#include "systm.h"
+#include "uio.h"
+#include "malloc.h"
+
+#include "machine/cpu.h"
+
+#include "vm/vm_param.h"
+#include "vm/lock.h"
+#include "vm/vm_statistics.h"
+#include "vm/pmap.h"
+#include "vm/vm_prot.h"
+
+extern        char *vmmap;            /* poor name! */
+/*ARGSUSED*/
+mmrw(dev, uio, flags)
+	dev_t dev;
+	struct uio *uio;
+	int flags;
+{
+	register int o;
+	register u_int c, v;
+	register struct iovec *iov;
+	int error = 0;
+	caddr_t zbuf = NULL;
+
+	while (uio->uio_resid > 0 && error == 0) {
+		iov = uio->uio_iov;
+		if (iov->iov_len == 0) {
+			uio->uio_iov++;
+			uio->uio_iovcnt--;
+			if (uio->uio_iovcnt < 0)
+				panic("mmrw");
+			continue;
+		}
+		switch (minor(dev)) {
+
+/* minor device 0 is physical memory */
+		case 0:
+			v = uio->uio_offset;
+			pmap_enter(pmap_kernel(), vmmap, v,
+				uio->uio_rw == UIO_READ ? VM_PROT_READ : VM_PROT_WRITE,
+				TRUE);
+			o = (int)uio->uio_offset & PGOFSET;
+			c = (u_int)(NBPG - ((int)iov->iov_base & PGOFSET));
+			c = MIN(c, (u_int)(NBPG - o));
+			c = MIN(c, (u_int)iov->iov_len);
+			error = uiomove((caddr_t)&vmmap[o], (int)c, uio);
+			pmap_remove(pmap_kernel(), vmmap, &vmmap[NBPG]);
+			continue;
+
+/* minor device 1 is kernel memory */
+		case 1:
+			c = iov->iov_len;
+			if (!kernacc((caddr_t)uio->uio_offset, c,
+			    uio->uio_rw == UIO_READ ? B_READ : B_WRITE))
+				return(EFAULT);
+			error = uiomove((caddr_t)uio->uio_offset, (int)c, uio);
+			continue;
+
+/* minor device 2 is EOF/RATHOLE */
+		case 2:
+			if (uio->uio_rw == UIO_READ)
+				return (0);
+			c = iov->iov_len;
+			break;
+
+/* minor device 12 (/dev/zero) is source of nulls on read, rathole on write */
+		case 12:
+			if (uio->uio_rw == UIO_WRITE) {
+				c = iov->iov_len;
+				break;
+			}
+			if (zbuf == NULL) {
+				zbuf = (caddr_t)
+				    malloc(CLBYTES, M_TEMP, M_WAITOK);
+				bzero(zbuf, CLBYTES);
+			}
+			c = MIN(iov->iov_len, CLBYTES);
+			error = uiomove(zbuf, (int)c, uio);
+			continue;
+
+#ifdef notyet
+/* 386 I/O address space (/dev/ioport[bwl]) is a read/write access to seperate
+   i/o device address bus, different than memory bus. Semantics here are
+   very different than ordinary read/write, as if iov_len is a multiple
+   an implied string move from a single port will be done. Note that lseek
+   must be used to set the port number reliably. */
+		case 14:
+			if (iov->iov_len == 1) {
+				u_char tmp;
+				tmp = inb(uio->uio_offset);
+				error = uiomove (&tmp, iov->iov_len, uio);
+			} else {
+				if (!useracc((caddr_t)iov->iov_base,
+					iov->iov_len, uio->uio_rw))
+					return (EFAULT);
+				insb(uio->uio_offset, iov->iov_base,
+					iov->iov_len);
+			}
+			break;
+		case 15:
+			if (iov->iov_len == sizeof (short)) {
+				u_short tmp;
+				tmp = inw(uio->uio_offset);
+				error = uiomove (&tmp, iov->iov_len, uio);
+			} else {
+				if (!useracc((caddr_t)iov->iov_base,
+					iov->iov_len, uio->uio_rw))
+					return (EFAULT);
+				insw(uio->uio_offset, iov->iov_base,
+					iov->iov_len/ sizeof (short));
+			}
+			break;
+		case 16:
+			if (iov->iov_len == sizeof (long)) {
+				u_long tmp;
+				tmp = inl(uio->uio_offset);
+				error = uiomove (&tmp, iov->iov_len, uio);
+			} else {
+				if (!useracc((caddr_t)iov->iov_base,
+					iov->iov_len, uio->uio_rw))
+					return (EFAULT);
+				insl(uio->uio_offset, iov->iov_base,
+					iov->iov_len/ sizeof (long));
+			}
+			break;
+#endif
+
+		default:
+			return (ENXIO);
+		}
+		if (error)
+			break;
+		iov->iov_base += c;
+		iov->iov_len -= c;
+		uio->uio_offset += c;
+		uio->uio_resid -= c;
+	}
+	if (zbuf)
+		free(zbuf, M_TEMP);
+	return (error);
+}