Commit | Line | Data |
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1da177e4 LT |
1 | |
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> | |
1da177e4 | 32 | #include <linux/syscalls.h> |
75a49581 KM |
33 | #include <linux/utsname.h> |
34 | #include <linux/personality.h> | |
1da177e4 | 35 | |
1da177e4 LT |
36 | static unsigned long get_unshared_area(unsigned long addr, unsigned long len) |
37 | { | |
a0031197 | 38 | struct vm_unmapped_area_info info; |
1da177e4 | 39 | |
a0031197 ML |
40 | info.flags = 0; |
41 | info.length = len; | |
42 | info.low_limit = PAGE_ALIGN(addr); | |
43 | info.high_limit = TASK_SIZE; | |
44 | info.align_mask = 0; | |
45 | info.align_offset = 0; | |
46 | return vm_unmapped_area(&info); | |
1da177e4 LT |
47 | } |
48 | ||
1da177e4 LT |
49 | /* |
50 | * We need to know the offset to use. Old scheme was to look for | |
51 | * existing mapping and use the same offset. New scheme is to use the | |
52 | * address of the kernel data structure as the seed for the offset. | |
53 | * We'll see how that works... | |
54 | * | |
55 | * The mapping is cacheline aligned, so there's no information in the bottom | |
56 | * few bits of the address. We're looking for 10 bits (4MB / 4k), so let's | |
57 | * drop the bottom 8 bits and use bits 8-17. | |
58 | */ | |
59 | static int get_offset(struct address_space *mapping) | |
60 | { | |
a0031197 | 61 | return (unsigned long) mapping >> 8; |
1da177e4 LT |
62 | } |
63 | ||
0576da2c HD |
64 | static unsigned long shared_align_offset(struct file *filp, unsigned long pgoff) |
65 | { | |
66 | struct address_space *mapping = filp ? filp->f_mapping : NULL; | |
67 | ||
68 | return (get_offset(mapping) + pgoff) << PAGE_SHIFT; | |
69 | } | |
70 | ||
71 | static unsigned long get_shared_area(struct file *filp, unsigned long addr, | |
72 | unsigned long len, unsigned long pgoff) | |
1da177e4 | 73 | { |
a0031197 | 74 | struct vm_unmapped_area_info info; |
1da177e4 | 75 | |
a0031197 ML |
76 | info.flags = 0; |
77 | info.length = len; | |
78 | info.low_limit = PAGE_ALIGN(addr); | |
79 | info.high_limit = TASK_SIZE; | |
80 | info.align_mask = PAGE_MASK & (SHMLBA - 1); | |
0576da2c | 81 | info.align_offset = shared_align_offset(filp, pgoff); |
a0031197 | 82 | return vm_unmapped_area(&info); |
1da177e4 LT |
83 | } |
84 | ||
85 | unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, | |
86 | unsigned long len, unsigned long pgoff, unsigned long flags) | |
87 | { | |
88 | if (len > TASK_SIZE) | |
89 | return -ENOMEM; | |
5ca8b91d JDA |
90 | if (flags & MAP_FIXED) { |
91 | if ((flags & MAP_SHARED) && | |
0576da2c | 92 | (addr - shared_align_offset(filp, pgoff)) & (SHMLBA - 1)) |
5ca8b91d | 93 | return -EINVAL; |
869e5101 | 94 | return addr; |
5ca8b91d | 95 | } |
1da177e4 LT |
96 | if (!addr) |
97 | addr = TASK_UNMAPPED_BASE; | |
98 | ||
0576da2c HD |
99 | if (filp || (flags & MAP_SHARED)) |
100 | addr = get_shared_area(filp, addr, len, pgoff); | |
101 | else | |
1da177e4 | 102 | addr = get_unshared_area(addr, len); |
0576da2c | 103 | |
1da177e4 LT |
104 | return addr; |
105 | } | |
106 | ||
1da177e4 LT |
107 | asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len, |
108 | unsigned long prot, unsigned long flags, unsigned long fd, | |
109 | unsigned long pgoff) | |
110 | { | |
111 | /* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE | |
112 | we have. */ | |
f8b72560 AV |
113 | return sys_mmap_pgoff(addr, len, prot, flags, fd, |
114 | pgoff >> (PAGE_SHIFT - 12)); | |
1da177e4 LT |
115 | } |
116 | ||
117 | asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len, | |
118 | unsigned long prot, unsigned long flags, unsigned long fd, | |
119 | unsigned long offset) | |
120 | { | |
121 | if (!(offset & ~PAGE_MASK)) { | |
f8b72560 AV |
122 | return sys_mmap_pgoff(addr, len, prot, flags, fd, |
123 | offset >> PAGE_SHIFT); | |
1da177e4 LT |
124 | } else { |
125 | return -EINVAL; | |
126 | } | |
127 | } | |
128 | ||
1da177e4 LT |
129 | /* Fucking broken ABI */ |
130 | ||
131 | #ifdef CONFIG_64BIT | |
132 | asmlinkage long parisc_truncate64(const char __user * path, | |
133 | unsigned int high, unsigned int low) | |
134 | { | |
135 | return sys_truncate(path, (long)high << 32 | low); | |
136 | } | |
137 | ||
138 | asmlinkage long parisc_ftruncate64(unsigned int fd, | |
139 | unsigned int high, unsigned int low) | |
140 | { | |
141 | return sys_ftruncate(fd, (long)high << 32 | low); | |
142 | } | |
143 | ||
144 | /* stubs for the benefit of the syscall_table since truncate64 and truncate | |
145 | * are identical on LP64 */ | |
146 | asmlinkage long sys_truncate64(const char __user * path, unsigned long length) | |
147 | { | |
148 | return sys_truncate(path, length); | |
149 | } | |
150 | asmlinkage long sys_ftruncate64(unsigned int fd, unsigned long length) | |
151 | { | |
152 | return sys_ftruncate(fd, length); | |
153 | } | |
154 | asmlinkage long sys_fcntl64(unsigned int fd, unsigned int cmd, unsigned long arg) | |
155 | { | |
156 | return sys_fcntl(fd, cmd, arg); | |
157 | } | |
158 | #else | |
159 | ||
160 | asmlinkage long parisc_truncate64(const char __user * path, | |
161 | unsigned int high, unsigned int low) | |
162 | { | |
163 | return sys_truncate64(path, (loff_t)high << 32 | low); | |
164 | } | |
165 | ||
166 | asmlinkage long parisc_ftruncate64(unsigned int fd, | |
167 | unsigned int high, unsigned int low) | |
168 | { | |
169 | return sys_ftruncate64(fd, (loff_t)high << 32 | low); | |
170 | } | |
171 | #endif | |
172 | ||
173 | asmlinkage ssize_t parisc_pread64(unsigned int fd, char __user *buf, size_t count, | |
174 | unsigned int high, unsigned int low) | |
175 | { | |
176 | return sys_pread64(fd, buf, count, (loff_t)high << 32 | low); | |
177 | } | |
178 | ||
179 | asmlinkage ssize_t parisc_pwrite64(unsigned int fd, const char __user *buf, | |
180 | size_t count, unsigned int high, unsigned int low) | |
181 | { | |
182 | return sys_pwrite64(fd, buf, count, (loff_t)high << 32 | low); | |
183 | } | |
184 | ||
185 | asmlinkage ssize_t parisc_readahead(int fd, unsigned int high, unsigned int low, | |
186 | size_t count) | |
187 | { | |
188 | return sys_readahead(fd, (loff_t)high << 32 | low, count); | |
189 | } | |
190 | ||
191 | asmlinkage long parisc_fadvise64_64(int fd, | |
192 | unsigned int high_off, unsigned int low_off, | |
193 | unsigned int high_len, unsigned int low_len, int advice) | |
194 | { | |
195 | return sys_fadvise64_64(fd, (loff_t)high_off << 32 | low_off, | |
196 | (loff_t)high_len << 32 | low_len, advice); | |
197 | } | |
198 | ||
6ca773cf KM |
199 | asmlinkage long parisc_sync_file_range(int fd, |
200 | u32 hi_off, u32 lo_off, u32 hi_nbytes, u32 lo_nbytes, | |
201 | unsigned int flags) | |
202 | { | |
203 | return sys_sync_file_range(fd, (loff_t)hi_off << 32 | lo_off, | |
204 | (loff_t)hi_nbytes << 32 | lo_nbytes, flags); | |
205 | } | |
206 | ||
4474a331 HD |
207 | asmlinkage long parisc_fallocate(int fd, int mode, u32 offhi, u32 offlo, |
208 | u32 lenhi, u32 lenlo) | |
209 | { | |
210 | return sys_fallocate(fd, mode, ((u64)offhi << 32) | offlo, | |
211 | ((u64)lenhi << 32) | lenlo); | |
212 | } | |
213 | ||
1da177e4 LT |
214 | asmlinkage unsigned long sys_alloc_hugepages(int key, unsigned long addr, unsigned long len, int prot, int flag) |
215 | { | |
216 | return -ENOMEM; | |
217 | } | |
218 | ||
219 | asmlinkage int sys_free_hugepages(unsigned long addr) | |
220 | { | |
221 | return -EINVAL; | |
222 | } | |
75a49581 KM |
223 | |
224 | long parisc_personality(unsigned long personality) | |
225 | { | |
226 | long err; | |
227 | ||
228 | if (personality(current->personality) == PER_LINUX32 | |
5b24c421 JK |
229 | && personality(personality) == PER_LINUX) |
230 | personality = (personality & ~PER_MASK) | PER_LINUX32; | |
75a49581 KM |
231 | |
232 | err = sys_personality(personality); | |
5b24c421 JK |
233 | if (personality(err) == PER_LINUX32) |
234 | err = (err & ~PER_MASK) | PER_LINUX; | |
75a49581 KM |
235 | |
236 | return err; | |
237 | } |