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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 | ||
64 | static unsigned long get_shared_area(struct address_space *mapping, | |
65 | unsigned long addr, unsigned long len, unsigned long pgoff) | |
66 | { | |
a0031197 | 67 | struct vm_unmapped_area_info info; |
1da177e4 | 68 | |
a0031197 ML |
69 | info.flags = 0; |
70 | info.length = len; | |
71 | info.low_limit = PAGE_ALIGN(addr); | |
72 | info.high_limit = TASK_SIZE; | |
73 | info.align_mask = PAGE_MASK & (SHMLBA - 1); | |
74 | info.align_offset = (get_offset(mapping) + pgoff) << PAGE_SHIFT; | |
75 | return vm_unmapped_area(&info); | |
1da177e4 LT |
76 | } |
77 | ||
78 | unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, | |
79 | unsigned long len, unsigned long pgoff, unsigned long flags) | |
80 | { | |
81 | if (len > TASK_SIZE) | |
82 | return -ENOMEM; | |
5ca8b91d JDA |
83 | if (flags & MAP_FIXED) { |
84 | if ((flags & MAP_SHARED) && | |
85 | (addr - (pgoff << PAGE_SHIFT)) & (SHMLBA - 1)) | |
86 | return -EINVAL; | |
869e5101 | 87 | return addr; |
5ca8b91d | 88 | } |
1da177e4 LT |
89 | if (!addr) |
90 | addr = TASK_UNMAPPED_BASE; | |
91 | ||
92 | if (filp) { | |
93 | addr = get_shared_area(filp->f_mapping, addr, len, pgoff); | |
94 | } else if(flags & MAP_SHARED) { | |
95 | addr = get_shared_area(NULL, addr, len, pgoff); | |
96 | } else { | |
97 | addr = get_unshared_area(addr, len); | |
98 | } | |
99 | return addr; | |
100 | } | |
101 | ||
1da177e4 LT |
102 | asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len, |
103 | unsigned long prot, unsigned long flags, unsigned long fd, | |
104 | unsigned long pgoff) | |
105 | { | |
106 | /* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE | |
107 | we have. */ | |
f8b72560 AV |
108 | return sys_mmap_pgoff(addr, len, prot, flags, fd, |
109 | pgoff >> (PAGE_SHIFT - 12)); | |
1da177e4 LT |
110 | } |
111 | ||
112 | asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len, | |
113 | unsigned long prot, unsigned long flags, unsigned long fd, | |
114 | unsigned long offset) | |
115 | { | |
116 | if (!(offset & ~PAGE_MASK)) { | |
f8b72560 AV |
117 | return sys_mmap_pgoff(addr, len, prot, flags, fd, |
118 | offset >> PAGE_SHIFT); | |
1da177e4 LT |
119 | } else { |
120 | return -EINVAL; | |
121 | } | |
122 | } | |
123 | ||
1da177e4 LT |
124 | /* Fucking broken ABI */ |
125 | ||
126 | #ifdef CONFIG_64BIT | |
127 | asmlinkage long parisc_truncate64(const char __user * path, | |
128 | unsigned int high, unsigned int low) | |
129 | { | |
130 | return sys_truncate(path, (long)high << 32 | low); | |
131 | } | |
132 | ||
133 | asmlinkage long parisc_ftruncate64(unsigned int fd, | |
134 | unsigned int high, unsigned int low) | |
135 | { | |
136 | return sys_ftruncate(fd, (long)high << 32 | low); | |
137 | } | |
138 | ||
139 | /* stubs for the benefit of the syscall_table since truncate64 and truncate | |
140 | * are identical on LP64 */ | |
141 | asmlinkage long sys_truncate64(const char __user * path, unsigned long length) | |
142 | { | |
143 | return sys_truncate(path, length); | |
144 | } | |
145 | asmlinkage long sys_ftruncate64(unsigned int fd, unsigned long length) | |
146 | { | |
147 | return sys_ftruncate(fd, length); | |
148 | } | |
149 | asmlinkage long sys_fcntl64(unsigned int fd, unsigned int cmd, unsigned long arg) | |
150 | { | |
151 | return sys_fcntl(fd, cmd, arg); | |
152 | } | |
153 | #else | |
154 | ||
155 | asmlinkage long parisc_truncate64(const char __user * path, | |
156 | unsigned int high, unsigned int low) | |
157 | { | |
158 | return sys_truncate64(path, (loff_t)high << 32 | low); | |
159 | } | |
160 | ||
161 | asmlinkage long parisc_ftruncate64(unsigned int fd, | |
162 | unsigned int high, unsigned int low) | |
163 | { | |
164 | return sys_ftruncate64(fd, (loff_t)high << 32 | low); | |
165 | } | |
166 | #endif | |
167 | ||
168 | asmlinkage ssize_t parisc_pread64(unsigned int fd, char __user *buf, size_t count, | |
169 | unsigned int high, unsigned int low) | |
170 | { | |
171 | return sys_pread64(fd, buf, count, (loff_t)high << 32 | low); | |
172 | } | |
173 | ||
174 | asmlinkage ssize_t parisc_pwrite64(unsigned int fd, const char __user *buf, | |
175 | size_t count, unsigned int high, unsigned int low) | |
176 | { | |
177 | return sys_pwrite64(fd, buf, count, (loff_t)high << 32 | low); | |
178 | } | |
179 | ||
180 | asmlinkage ssize_t parisc_readahead(int fd, unsigned int high, unsigned int low, | |
181 | size_t count) | |
182 | { | |
183 | return sys_readahead(fd, (loff_t)high << 32 | low, count); | |
184 | } | |
185 | ||
186 | asmlinkage long parisc_fadvise64_64(int fd, | |
187 | unsigned int high_off, unsigned int low_off, | |
188 | unsigned int high_len, unsigned int low_len, int advice) | |
189 | { | |
190 | return sys_fadvise64_64(fd, (loff_t)high_off << 32 | low_off, | |
191 | (loff_t)high_len << 32 | low_len, advice); | |
192 | } | |
193 | ||
6ca773cf KM |
194 | asmlinkage long parisc_sync_file_range(int fd, |
195 | u32 hi_off, u32 lo_off, u32 hi_nbytes, u32 lo_nbytes, | |
196 | unsigned int flags) | |
197 | { | |
198 | return sys_sync_file_range(fd, (loff_t)hi_off << 32 | lo_off, | |
199 | (loff_t)hi_nbytes << 32 | lo_nbytes, flags); | |
200 | } | |
201 | ||
4474a331 HD |
202 | asmlinkage long parisc_fallocate(int fd, int mode, u32 offhi, u32 offlo, |
203 | u32 lenhi, u32 lenlo) | |
204 | { | |
205 | return sys_fallocate(fd, mode, ((u64)offhi << 32) | offlo, | |
206 | ((u64)lenhi << 32) | lenlo); | |
207 | } | |
208 | ||
1da177e4 LT |
209 | asmlinkage unsigned long sys_alloc_hugepages(int key, unsigned long addr, unsigned long len, int prot, int flag) |
210 | { | |
211 | return -ENOMEM; | |
212 | } | |
213 | ||
214 | asmlinkage int sys_free_hugepages(unsigned long addr) | |
215 | { | |
216 | return -EINVAL; | |
217 | } | |
75a49581 KM |
218 | |
219 | long parisc_personality(unsigned long personality) | |
220 | { | |
221 | long err; | |
222 | ||
223 | if (personality(current->personality) == PER_LINUX32 | |
5b24c421 JK |
224 | && personality(personality) == PER_LINUX) |
225 | personality = (personality & ~PER_MASK) | PER_LINUX32; | |
75a49581 KM |
226 | |
227 | err = sys_personality(personality); | |
5b24c421 JK |
228 | if (personality(err) == PER_LINUX32) |
229 | err = (err & ~PER_MASK) | PER_LINUX; | |
75a49581 KM |
230 | |
231 | return err; | |
232 | } |