Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 335 insertions, 0 deletions

diff --git a/arch/alpha/kernel/srm_env.c b/arch/alpha/kernel/srm_env.c
new file mode 100644
index 000000000000..5c98fc83e238
--- /dev/null
+++ b/arch/alpha/kernel/srm_env.c
@@ -0,0 +1,335 @@
+/*
+ * srm_env.c - Access to SRM environment
+ *             variables through linux' procfs
+ *
+ * Copyright (C) 2001-2002 Jan-Benedict Glaw <jbglaw@lug-owl.de>
+ *
+ * This driver is at all a modified version of Erik Mouw's
+ * Documentation/DocBook/procfs_example.c, so: thank
+ * you, Erik! He can be reached via email at
+ * <J.A.K.Mouw@its.tudelft.nl>. It is based on an idea
+ * provided by DEC^WCompaq^WIntel's "Jumpstart" CD. They
+ * included a patch like this as well. Thanks for idea!
+ *
+ * This program is free software; you can redistribute
+ * it and/or modify it under the terms of the GNU General
+ * Public License version 2 as published by the Free Software
+ * Foundation.
+ *
+ * This program is distributed in the hope that it will be
+ * useful, but WITHOUT ANY WARRANTY; without even the implied
+ * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
+ * PURPOSE.  See the GNU General Public License for more
+ * details.
+ * 
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place,
+ * Suite 330, Boston, MA  02111-1307  USA
+ *
+ */
+
+/*
+ * Changelog
+ * ~~~~~~~~~
+ *
+ * Thu, 22 Aug 2002 15:10:43 +0200
+ * 	- Update Config.help entry. I got a number of emails asking
+ * 	  me to tell their senders if they could make use of this
+ * 	  piece of code... So: "SRM is something like BIOS for your
+ * 	  Alpha"
+ * 	- Update code formatting a bit to better conform CodingStyle
+ * 	  rules.
+ * 	- So this is v0.0.5, with no changes (except formatting)
+ * 	
+ * Wed, 22 May 2002 00:11:21 +0200
+ * 	- Fix typo on comment (SRC -> SRM)
+ * 	- Call this "Version 0.0.4"
+ *
+ * Tue,  9 Apr 2002 18:44:40 +0200
+ * 	- Implement access by variable name and additionally
+ * 	  by number. This is done by creating two subdirectories
+ * 	  where one holds all names (like the old directory
+ * 	  did) and the other holding 256 files named like "0",
+ * 	  "1" and so on.
+ * 	- Call this "Version 0.0.3"
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/proc_fs.h>
+#include <asm/console.h>
+#include <asm/uaccess.h>
+#include <asm/machvec.h>
+
+#define BASE_DIR	"srm_environment"	/* Subdir in /proc/		*/
+#define NAMED_DIR	"named_variables"	/* Subdir for known variables	*/
+#define NUMBERED_DIR	"numbered_variables"	/* Subdir for all variables	*/
+#define VERSION		"0.0.5"			/* Module version		*/
+#define NAME		"srm_env"		/* Module name			*/
+
+MODULE_AUTHOR("Jan-Benedict Glaw <jbglaw@lug-owl.de>");
+MODULE_DESCRIPTION("Accessing Alpha SRM environment through procfs interface");
+MODULE_LICENSE("GPL");
+
+typedef struct _srm_env {
+	char			*name;
+	unsigned long		id;
+	struct proc_dir_entry	*proc_entry;
+} srm_env_t;
+
+static struct proc_dir_entry	*base_dir;
+static struct proc_dir_entry	*named_dir;
+static struct proc_dir_entry	*numbered_dir;
+static char			number[256][4];
+
+static srm_env_t	srm_named_entries[] = {
+	{ "auto_action",	ENV_AUTO_ACTION		},
+	{ "boot_dev",		ENV_BOOT_DEV		},
+	{ "bootdef_dev",	ENV_BOOTDEF_DEV		},
+	{ "booted_dev",		ENV_BOOTED_DEV		},
+	{ "boot_file",		ENV_BOOT_FILE		},
+	{ "booted_file",	ENV_BOOTED_FILE		},
+	{ "boot_osflags",	ENV_BOOT_OSFLAGS	},
+	{ "booted_osflags",	ENV_BOOTED_OSFLAGS	},
+	{ "boot_reset",		ENV_BOOT_RESET		},
+	{ "dump_dev",		ENV_DUMP_DEV		},
+	{ "enable_audit",	ENV_ENABLE_AUDIT	},
+	{ "license",		ENV_LICENSE		},
+	{ "char_set",		ENV_CHAR_SET		},
+	{ "language",		ENV_LANGUAGE		},
+	{ "tty_dev",		ENV_TTY_DEV		},
+	{ NULL,			0			},
+};
+static srm_env_t	srm_numbered_entries[256];
+
+
+
+static int
+srm_env_read(char *page, char **start, off_t off, int count, int *eof,
+		void *data)
+{
+	int		nbytes;
+	unsigned long	ret;
+	srm_env_t	*entry;
+
+	if(off != 0)
+		return -EFAULT;
+
+	entry	= (srm_env_t *) data;
+	ret	= callback_getenv(entry->id, page, count);
+
+	if((ret >> 61) == 0)
+		nbytes = (int) ret;
+	else
+		nbytes = -EFAULT;
+
+	return nbytes;
+}
+
+
+static int
+srm_env_write(struct file *file, const char __user *buffer, unsigned long count,
+		void *data)
+{
+	int res;
+	srm_env_t	*entry;
+	char		*buf = (char *) __get_free_page(GFP_USER);
+	unsigned long	ret1, ret2;
+
+	entry = (srm_env_t *) data;
+
+	if (!buf)
+		return -ENOMEM;
+
+	res = -EINVAL;
+	if (count >= PAGE_SIZE)
+		goto out;
+
+	res = -EFAULT;
+	if (copy_from_user(buf, buffer, count))
+		goto out;
+	buf[count] = '\0';
+
+	ret1 = callback_setenv(entry->id, buf, count);
+	if ((ret1 >> 61) == 0) {
+		do 
+			ret2 = callback_save_env();
+		while((ret2 >> 61) == 1);
+		res = (int) ret1;
+	}
+
+ out:
+	free_page((unsigned long)buf);
+	return res;
+}
+
+static void
+srm_env_cleanup(void)
+{
+	srm_env_t	*entry;
+	unsigned long	var_num;
+
+	if(base_dir) {
+		/*
+		 * Remove named entries
+		 */
+		if(named_dir) {
+			entry = srm_named_entries;
+			while(entry->name != NULL && entry->id != 0) {
+				if(entry->proc_entry) {
+					remove_proc_entry(entry->name,
+							named_dir);
+					entry->proc_entry = NULL;
+				}
+				entry++;
+			}
+			remove_proc_entry(NAMED_DIR, base_dir);
+		}
+
+		/*
+		 * Remove numbered entries
+		 */
+		if(numbered_dir) {
+			for(var_num = 0; var_num <= 255; var_num++) {
+				entry =	&srm_numbered_entries[var_num];
+
+				if(entry->proc_entry) {
+					remove_proc_entry(entry->name,
+							numbered_dir);
+					entry->proc_entry	= NULL;
+					entry->name		= NULL;
+				}
+			}
+			remove_proc_entry(NUMBERED_DIR, base_dir);
+		}
+
+		remove_proc_entry(BASE_DIR, NULL);
+	}
+
+	return;
+}
+
+
+static int __init
+srm_env_init(void)
+{
+	srm_env_t	*entry;
+	unsigned long	var_num;
+
+	/*
+	 * Check system
+	 */
+	if(!alpha_using_srm) {
+		printk(KERN_INFO "%s: This Alpha system doesn't "
+				"know about SRM (or you've booted "
+				"SRM->MILO->Linux, which gets "
+				"misdetected)...\n", __FUNCTION__);
+		return -ENODEV;
+	}
+
+	/*
+	 * Init numbers
+	 */
+	for(var_num = 0; var_num <= 255; var_num++)
+		sprintf(number[var_num], "%ld", var_num);
+
+	/*
+	 * Create base directory
+	 */
+	base_dir = proc_mkdir(BASE_DIR, NULL);
+	if(base_dir == NULL) {
+		printk(KERN_ERR "Couldn't create base dir /proc/%s\n",
+				BASE_DIR);
+		goto cleanup;
+	}
+	base_dir->owner = THIS_MODULE;
+
+	/*
+	 * Create per-name subdirectory
+	 */
+	named_dir = proc_mkdir(NAMED_DIR, base_dir);
+	if(named_dir == NULL) {
+		printk(KERN_ERR "Couldn't create dir /proc/%s/%s\n",
+				BASE_DIR, NAMED_DIR);
+		goto cleanup;
+	}
+	named_dir->owner = THIS_MODULE;
+
+	/*
+	 * Create per-number subdirectory
+	 */
+	numbered_dir = proc_mkdir(NUMBERED_DIR, base_dir);
+	if(numbered_dir == NULL) {
+		printk(KERN_ERR "Couldn't create dir /proc/%s/%s\n",
+				BASE_DIR, NUMBERED_DIR);
+		goto cleanup;
+
+	}
+	numbered_dir->owner = THIS_MODULE;
+
+	/*
+	 * Create all named nodes
+	 */
+	entry = srm_named_entries;
+	while(entry->name != NULL && entry->id != 0) {
+		entry->proc_entry = create_proc_entry(entry->name,
+				0644, named_dir);
+		if(entry->proc_entry == NULL)
+			goto cleanup;
+
+		entry->proc_entry->data		= (void *) entry;
+		entry->proc_entry->owner	= THIS_MODULE;
+		entry->proc_entry->read_proc	= srm_env_read;
+		entry->proc_entry->write_proc	= srm_env_write;
+
+		entry++;
+	}
+
+	/*
+	 * Create all numbered nodes
+	 */
+	for(var_num = 0; var_num <= 255; var_num++) {
+		entry = &srm_numbered_entries[var_num];
+		entry->name = number[var_num];
+
+		entry->proc_entry = create_proc_entry(entry->name,
+				0644, numbered_dir);
+		if(entry->proc_entry == NULL)
+			goto cleanup;
+
+		entry->id			= var_num;
+		entry->proc_entry->data		= (void *) entry;
+		entry->proc_entry->owner	= THIS_MODULE;
+		entry->proc_entry->read_proc	= srm_env_read;
+		entry->proc_entry->write_proc	= srm_env_write;
+	}
+
+	printk(KERN_INFO "%s: version %s loaded successfully\n", NAME,
+			VERSION);
+
+	return 0;
+
+cleanup:
+	srm_env_cleanup();
+
+	return -ENOMEM;
+}
+
+
+static void __exit
+srm_env_exit(void)
+{
+	srm_env_cleanup();
+	printk(KERN_INFO "%s: unloaded successfully\n", NAME);
+
+	return;
+}
+
+
+module_init(srm_env_init);
+module_exit(srm_env_exit);
+