From e0faf22f31c48fb27b43c1825897d26e58feafc4 Mon Sep 17 00:00:00 2001
From: root <root@(null).(none)>
Date: Sun, 3 May 2009 17:20:00 +0200
Subject: This is my initial working version. There is a bug in boot in this
 version: subhurd sometimes cannot boot.

---
 serverboot/def_pager_setup.c | 152 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 152 insertions(+)
 create mode 100644 serverboot/def_pager_setup.c

(limited to 'serverboot/def_pager_setup.c')

diff --git a/serverboot/def_pager_setup.c b/serverboot/def_pager_setup.c
new file mode 100644
index 00000000..5e2073ec
--- /dev/null
+++ b/serverboot/def_pager_setup.c
@@ -0,0 +1,152 @@
+/*
+ * Mach Operating System
+ * Copyright (c) 1992-1989 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 "AS IS"
+ * 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 Mellon
+ * the rights to redistribute these changes.
+ */
+#include <mach.h>
+#include <mach/mig_errors.h>
+#include <mach/default_pager_types.h>
+
+#include <file_io.h>
+
+extern void *kalloc();
+
+/*
+ * Create a paging partition given a file name
+ */
+extern void	create_paging_partition();
+
+kern_return_t
+add_paging_file(master_device_port, file_name, linux_signature)
+	mach_port_t		master_device_port;
+	char			*file_name;
+	int			linux_signature;
+{
+	register struct file_direct *fdp;
+	register kern_return_t	result;
+	struct file     	pfile;
+	boolean_t		isa_file;
+
+	bzero((char *) &pfile, sizeof(struct file));
+
+	result = open_file(master_device_port, file_name, &pfile);
+	if (result != KERN_SUCCESS)
+		return result;
+
+	fdp = (struct file_direct *) kalloc(sizeof *fdp);
+	bzero((char *) fdp, sizeof *fdp);
+
+	isa_file = file_is_structured(&pfile);
+
+	result = open_file_direct(pfile.f_dev, fdp, isa_file);
+	if (result)
+		panic("Can't open paging file %s: %s\n",
+		      file_name, strerror (result));
+
+	result = add_file_direct(fdp, &pfile);
+	if (result)
+		panic("Can't read disk addresses: %s\n", strerror (result));
+
+	close_file(&pfile);
+
+	/*
+	 * Set up the default paging partition
+	 */
+	create_paging_partition(file_name, fdp, isa_file, linux_signature);
+
+	return result;
+}
+
+/*
+ * Destroy a paging_partition given a file name
+ */
+kern_return_t
+remove_paging_file(file_name)
+	char			*file_name;
+{
+	struct file_direct	*fdp = 0;
+	kern_return_t		kr;
+
+	kr = destroy_paging_partition(file_name, &fdp);
+	if (kr == KERN_SUCCESS) {
+		remove_file_direct(fdp);
+		kfree(fdp, sizeof(*fdp));
+	}
+	return kr;
+}
+
+kern_return_t
+default_pager_paging_storage (mach_port_t pager,
+                              mach_port_t device,
+                              recnum_t *runs, mach_msg_type_number_t nrun,
+                              default_pager_filename_t name,
+                              boolean_t add)
+{
+  return MIG_BAD_ID;
+}
+
+#if 0				/* no longer used */
+/*
+ * Set up default pager
+ */
+extern char *strbuild();
+
+boolean_t
+default_pager_setup(master_device_port, server_dir_name)
+	mach_port_t master_device_port;
+	char	*server_dir_name;
+{
+	register kern_return_t	result;
+
+	char	paging_file_name[MAXPATHLEN+1];
+
+	(void) strbuild(paging_file_name,
+			server_dir_name,
+			"/paging_file",
+			(char *)0);
+
+	while (TRUE) {
+	    result = add_paging_file(master_device_port, paging_file_name);
+	    if (result == KERN_SUCCESS)
+		break;
+	    printf("Can't open paging file %s: %d\n",
+		   paging_file_name,
+		   result);
+
+	    bzero(paging_file_name, sizeof(paging_file_name));
+	    printf("Paging file name ? ");
+	    safe_gets(paging_file_name, sizeof(paging_file_name));
+
+	    if (paging_file_name[0] == 0) {
+		printf("*** WARNING: running without paging area!\n");
+		return FALSE;
+	    }
+	}
+
+	/*
+	 * Our caller will become the default pager - later
+	 */
+
+	return TRUE;
+}
+#endif
-- 
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