diff options
Diffstat (limited to 'linux/dev/glue/misc.c')
| -rw-r--r-- | linux/dev/glue/misc.c | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/linux/dev/glue/misc.c b/linux/dev/glue/misc.c new file mode 100644 index 0000000..5646e5e --- /dev/null +++ b/linux/dev/glue/misc.c @@ -0,0 +1,248 @@ +/* + * Miscellaneous routines and data for Linux emulation. + * + * Copyright (C) 1996 The University of Utah and the Computer Systems + * Laboratory at the University of Utah (CSL) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * 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, 675 Mass Ave, Cambridge, MA 02139, USA. + * + * Author: Shantanu Goel, University of Utah CSL + */ + +/* + * linux/fs/proc/scsi.c + * (c) 1995 Michael Neuffer neuffer@goofy.zdv.uni-mainz.de + * + * The original version was derived from linux/fs/proc/net.c, + * which is Copyright (C) 1991, 1992 Linus Torvalds. + * Much has been rewritten, but some of the code still remains. + * + * /proc/scsi directory handling functions + * + * last change: 95/07/04 + * + * Initial version: March '95 + * 95/05/15 Added subdirectories for each driver and show every + * registered HBA as a single file. + * 95/05/30 Added rudimentary write support for parameter passing + * 95/07/04 Fixed bugs in directory handling + * 95/09/13 Update to support the new proc-dir tree + * + * TODO: Improve support to write to the driver files + * Add some more comments + */ + +/* + * linux/fs/buffer.c + * + * Copyright (C) 1991, 1992 Linus Torvalds + */ + +#include <sys/types.h> +#include <mach/vm_param.h> +#include <kern/thread.h> +#include <kern/printf.h> +#include <kern/mach_host.server.h> +#include <vm/vm_map.h> +#include <vm/vm_page.h> +#include <device/device_types.h> + +#define MACH_INCLUDE +#include <linux/types.h> +#include <linux/config.h> +#include <linux/errno.h> +#include <linux/mm.h> +#include <linux/fs.h> +#include <linux/blk.h> +#include <linux/proc_fs.h> +#include <linux/kernel_stat.h> +#include <linux/dev/glue/glue.h> + +int (*dispatch_scsi_info_ptr) (int ino, char *buffer, char **start, + off_t offset, int length, int inout) = 0; + +struct kernel_stat kstat; + +int +linux_to_mach_error (int err) +{ + switch (err) + { + case 0: + return D_SUCCESS; + + case -EPERM: + return D_INVALID_OPERATION; + + case -EIO: + return D_IO_ERROR; + + case -ENXIO: + return D_NO_SUCH_DEVICE; + + case -EACCES: + return D_INVALID_OPERATION; + + case -EFAULT: + return D_INVALID_SIZE; + + case -EBUSY: + return D_ALREADY_OPEN; + + case -EINVAL: + return D_INVALID_SIZE; + + case -EROFS: + return D_READ_ONLY; + + case -EWOULDBLOCK: + return D_WOULD_BLOCK; + + case -ENOMEM: + return D_NO_MEMORY; + + default: + printf ("linux_to_mach_error: unknown code %d\n", err); + return D_IO_ERROR; + } +} + +int +issig () +{ + if (!current_thread()) + return 0; + return current_thread ()->wait_result != THREAD_AWAKENED; +} + +int +block_fsync (struct inode *inode, struct file *filp) +{ + return 0; +} + +int +verify_area (int rw, const void *p, unsigned long size) +{ + vm_prot_t prot = (rw == VERIFY_WRITE) ? VM_PROT_WRITE : VM_PROT_READ; + vm_offset_t addr = trunc_page ((vm_offset_t) p); + vm_size_t len = round_page ((vm_size_t) size); + vm_map_entry_t entry; + + vm_map_lock_read (current_map ()); + + while (1) + { + if (!vm_map_lookup_entry (current_map (), addr, &entry) + || (entry->protection & prot) != prot) + { + vm_map_unlock_read (current_map ()); + return -EFAULT; + } + if (entry->vme_end - entry->vme_start >= len) + break; + len -= entry->vme_end - entry->vme_start; + addr += entry->vme_end - entry->vme_start; + } + + vm_map_unlock_read (current_map ()); + return 0; +} + +/* + * Print device name (in decimal, hexadecimal or symbolic) - + * at present hexadecimal only. + * Note: returns pointer to static data! + */ +char * +kdevname (kdev_t dev) +{ + static char buffer[32]; + linux_sprintf (buffer, "%02x:%02x", MAJOR (dev), MINOR (dev)); + return buffer; +} + +/* RO fail safe mechanism */ + +static long ro_bits[MAX_BLKDEV][8]; + +int +is_read_only (kdev_t dev) +{ + int minor, major; + + major = MAJOR (dev); + minor = MINOR (dev); + if (major < 0 || major >= MAX_BLKDEV) + return 0; + return ro_bits[major][minor >> 5] & (1 << (minor & 31)); +} + +void +set_device_ro (kdev_t dev, int flag) +{ + int minor, major; + + major = MAJOR (dev); + minor = MINOR (dev); + if (major < 0 || major >= MAX_BLKDEV) + return; + if (flag) + ro_bits[major][minor >> 5] |= 1 << (minor & 31); + else + ro_bits[major][minor >> 5] &= ~(1 << (minor & 31)); +} + +struct proc_dir_entry proc_scsi; +struct inode_operations proc_scsi_inode_operations; +struct proc_dir_entry proc_net; +struct inode_operations proc_net_inode_operations; + +int +proc_register (struct proc_dir_entry *xxx1, struct proc_dir_entry *xxx2) +{ + return 0; +} + +int +proc_unregister (struct proc_dir_entry *xxx1, int xxx2) +{ + return 0; +} + +void +add_blkdev_randomness (int major) +{ +} + +void +do_gettimeofday (struct timeval *tv) +{ + /* + * XXX: The first argument should be mach_host_self (), but that's too + * expensive, and the host argument is not used by host_get_time (), + * only checked not to be HOST_NULL. + */ + time_value64_t tv64; + host_get_time64 ((host_t) 1, &tv64); + tv->tv_sec = tv64.seconds; + tv->tv_usec = tv64.nanoseconds / 1000; +} + +int +dev_get_info (char *buffer, char **start, off_t offset, int length, int dummy) +{ + return 0; +} |