blob: 71b31957c8f13805c5a8da1c93c6061bf562f2a7 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001
2/*
3 * PARISC specific syscalls
4 *
5 * Copyright (C) 1999-2003 Matthew Wilcox <willy at parisc-linux.org>
6 * Copyright (C) 2000-2003 Paul Bame <bame at parisc-linux.org>
7 * Copyright (C) 2001 Thomas Bogendoerfer <tsbogend at parisc-linux.org>
8 *
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 */
24
25#include <asm/uaccess.h>
26#include <linux/file.h>
27#include <linux/fs.h>
28#include <linux/linkage.h>
29#include <linux/mm.h>
30#include <linux/mman.h>
31#include <linux/shm.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include <linux/syscalls.h>
Kyle McMartin75a49582006-08-27 11:12:13 -040033#include <linux/utsname.h>
34#include <linux/personality.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
Linus Torvalds1da177e2005-04-16 15:20:36 -070036static unsigned long get_unshared_area(unsigned long addr, unsigned long len)
37{
38 struct vm_area_struct *vma;
39
40 addr = PAGE_ALIGN(addr);
41
42 for (vma = find_vma(current->mm, addr); ; vma = vma->vm_next) {
43 /* At this point: (!vma || addr < vma->vm_end). */
44 if (TASK_SIZE - len < addr)
45 return -ENOMEM;
46 if (!vma || addr + len <= vma->vm_start)
47 return addr;
48 addr = vma->vm_end;
49 }
50}
51
52#define DCACHE_ALIGN(addr) (((addr) + (SHMLBA - 1)) &~ (SHMLBA - 1))
53
54/*
55 * We need to know the offset to use. Old scheme was to look for
56 * existing mapping and use the same offset. New scheme is to use the
57 * address of the kernel data structure as the seed for the offset.
58 * We'll see how that works...
59 *
60 * The mapping is cacheline aligned, so there's no information in the bottom
61 * few bits of the address. We're looking for 10 bits (4MB / 4k), so let's
62 * drop the bottom 8 bits and use bits 8-17.
63 */
64static int get_offset(struct address_space *mapping)
65{
66 int offset = (unsigned long) mapping << (PAGE_SHIFT - 8);
67 return offset & 0x3FF000;
68}
69
70static unsigned long get_shared_area(struct address_space *mapping,
71 unsigned long addr, unsigned long len, unsigned long pgoff)
72{
73 struct vm_area_struct *vma;
74 int offset = mapping ? get_offset(mapping) : 0;
75
76 addr = DCACHE_ALIGN(addr - offset) + offset;
77
78 for (vma = find_vma(current->mm, addr); ; vma = vma->vm_next) {
79 /* At this point: (!vma || addr < vma->vm_end). */
80 if (TASK_SIZE - len < addr)
81 return -ENOMEM;
82 if (!vma || addr + len <= vma->vm_start)
83 return addr;
84 addr = DCACHE_ALIGN(vma->vm_end - offset) + offset;
85 if (addr < vma->vm_end) /* handle wraparound */
86 return -ENOMEM;
87 }
88}
89
90unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
91 unsigned long len, unsigned long pgoff, unsigned long flags)
92{
93 if (len > TASK_SIZE)
94 return -ENOMEM;
Benjamin Herrenschmidt869e5102007-05-06 14:50:09 -070095 /* Might want to check for cache aliasing issues for MAP_FIXED case
96 * like ARM or MIPS ??? --BenH.
97 */
98 if (flags & MAP_FIXED)
99 return addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 if (!addr)
101 addr = TASK_UNMAPPED_BASE;
102
103 if (filp) {
104 addr = get_shared_area(filp->f_mapping, addr, len, pgoff);
105 } else if(flags & MAP_SHARED) {
106 addr = get_shared_area(NULL, addr, len, pgoff);
107 } else {
108 addr = get_unshared_area(addr, len);
109 }
110 return addr;
111}
112
113static unsigned long do_mmap2(unsigned long addr, unsigned long len,
114 unsigned long prot, unsigned long flags, unsigned long fd,
115 unsigned long pgoff)
116{
117 struct file * file = NULL;
118 unsigned long error = -EBADF;
119 if (!(flags & MAP_ANONYMOUS)) {
120 file = fget(fd);
121 if (!file)
122 goto out;
123 }
124
125 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
126
127 down_write(&current->mm->mmap_sem);
128 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
129 up_write(&current->mm->mmap_sem);
130
131 if (file != NULL)
132 fput(file);
133out:
134 return error;
135}
136
137asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len,
138 unsigned long prot, unsigned long flags, unsigned long fd,
139 unsigned long pgoff)
140{
141 /* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE
142 we have. */
143 return do_mmap2(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT - 12));
144}
145
146asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
147 unsigned long prot, unsigned long flags, unsigned long fd,
148 unsigned long offset)
149{
150 if (!(offset & ~PAGE_MASK)) {
151 return do_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
152 } else {
153 return -EINVAL;
154 }
155}
156
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157/* Fucking broken ABI */
158
159#ifdef CONFIG_64BIT
160asmlinkage long parisc_truncate64(const char __user * path,
161 unsigned int high, unsigned int low)
162{
163 return sys_truncate(path, (long)high << 32 | low);
164}
165
166asmlinkage long parisc_ftruncate64(unsigned int fd,
167 unsigned int high, unsigned int low)
168{
169 return sys_ftruncate(fd, (long)high << 32 | low);
170}
171
172/* stubs for the benefit of the syscall_table since truncate64 and truncate
173 * are identical on LP64 */
174asmlinkage long sys_truncate64(const char __user * path, unsigned long length)
175{
176 return sys_truncate(path, length);
177}
178asmlinkage long sys_ftruncate64(unsigned int fd, unsigned long length)
179{
180 return sys_ftruncate(fd, length);
181}
182asmlinkage long sys_fcntl64(unsigned int fd, unsigned int cmd, unsigned long arg)
183{
184 return sys_fcntl(fd, cmd, arg);
185}
186#else
187
188asmlinkage long parisc_truncate64(const char __user * path,
189 unsigned int high, unsigned int low)
190{
191 return sys_truncate64(path, (loff_t)high << 32 | low);
192}
193
194asmlinkage long parisc_ftruncate64(unsigned int fd,
195 unsigned int high, unsigned int low)
196{
197 return sys_ftruncate64(fd, (loff_t)high << 32 | low);
198}
199#endif
200
201asmlinkage ssize_t parisc_pread64(unsigned int fd, char __user *buf, size_t count,
202 unsigned int high, unsigned int low)
203{
204 return sys_pread64(fd, buf, count, (loff_t)high << 32 | low);
205}
206
207asmlinkage ssize_t parisc_pwrite64(unsigned int fd, const char __user *buf,
208 size_t count, unsigned int high, unsigned int low)
209{
210 return sys_pwrite64(fd, buf, count, (loff_t)high << 32 | low);
211}
212
213asmlinkage ssize_t parisc_readahead(int fd, unsigned int high, unsigned int low,
214 size_t count)
215{
216 return sys_readahead(fd, (loff_t)high << 32 | low, count);
217}
218
219asmlinkage long parisc_fadvise64_64(int fd,
220 unsigned int high_off, unsigned int low_off,
221 unsigned int high_len, unsigned int low_len, int advice)
222{
223 return sys_fadvise64_64(fd, (loff_t)high_off << 32 | low_off,
224 (loff_t)high_len << 32 | low_len, advice);
225}
226
Kyle McMartin6ca773c2006-04-20 04:44:07 +0000227asmlinkage long parisc_sync_file_range(int fd,
228 u32 hi_off, u32 lo_off, u32 hi_nbytes, u32 lo_nbytes,
229 unsigned int flags)
230{
231 return sys_sync_file_range(fd, (loff_t)hi_off << 32 | lo_off,
232 (loff_t)hi_nbytes << 32 | lo_nbytes, flags);
233}
234
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235asmlinkage unsigned long sys_alloc_hugepages(int key, unsigned long addr, unsigned long len, int prot, int flag)
236{
237 return -ENOMEM;
238}
239
240asmlinkage int sys_free_hugepages(unsigned long addr)
241{
242 return -EINVAL;
243}
Kyle McMartin75a49582006-08-27 11:12:13 -0400244
245long parisc_personality(unsigned long personality)
246{
247 long err;
248
249 if (personality(current->personality) == PER_LINUX32
250 && personality == PER_LINUX)
251 personality = PER_LINUX32;
252
253 err = sys_personality(personality);
254 if (err == PER_LINUX32)
255 err = PER_LINUX;
256
257 return err;
258}
259
Matthew Wilcoxf64ef292006-10-04 13:33:53 -0600260long parisc_newuname(struct new_utsname __user *name)
Kyle McMartin75a49582006-08-27 11:12:13 -0400261{
Matthew Wilcoxf64ef292006-10-04 13:33:53 -0600262 int err = sys_newuname(name);
Kyle McMartin75a49582006-08-27 11:12:13 -0400263
Matthew Wilcoxf64ef292006-10-04 13:33:53 -0600264#ifdef CONFIG_COMPAT
265 if (!err && personality(current->personality) == PER_LINUX32) {
266 if (__put_user(0, name->machine + 6) ||
267 __put_user(0, name->machine + 7))
268 err = -EFAULT;
269 }
270#endif
Kyle McMartin75a49582006-08-27 11:12:13 -0400271
Matthew Wilcoxf64ef292006-10-04 13:33:53 -0600272 return err;
Kyle McMartin75a49582006-08-27 11:12:13 -0400273}