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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 | { | |
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 | */ | |
64 | static int get_offset(struct address_space *mapping) | |
65 | { | |
66 | int offset = (unsigned long) mapping << (PAGE_SHIFT - 8); | |
67 | return offset & 0x3FF000; | |
68 | } | |
69 | ||
70 | static 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 | ||
90 | unsigned 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; | |
869e5101 BH |
95 | /* 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; | |
1da177e4 LT |
100 | 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 | ||
1da177e4 LT |
113 | asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len, |
114 | unsigned long prot, unsigned long flags, unsigned long fd, | |
115 | unsigned long pgoff) | |
116 | { | |
117 | /* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE | |
118 | we have. */ | |
f8b72560 AV |
119 | return sys_mmap_pgoff(addr, len, prot, flags, fd, |
120 | pgoff >> (PAGE_SHIFT - 12)); | |
1da177e4 LT |
121 | } |
122 | ||
123 | asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len, | |
124 | unsigned long prot, unsigned long flags, unsigned long fd, | |
125 | unsigned long offset) | |
126 | { | |
127 | if (!(offset & ~PAGE_MASK)) { | |
f8b72560 AV |
128 | return sys_mmap_pgoff(addr, len, prot, flags, fd, |
129 | offset >> PAGE_SHIFT); | |
1da177e4 LT |
130 | } else { |
131 | return -EINVAL; | |
132 | } | |
133 | } | |
134 | ||
1da177e4 LT |
135 | /* Fucking broken ABI */ |
136 | ||
137 | #ifdef CONFIG_64BIT | |
138 | asmlinkage long parisc_truncate64(const char __user * path, | |
139 | unsigned int high, unsigned int low) | |
140 | { | |
141 | return sys_truncate(path, (long)high << 32 | low); | |
142 | } | |
143 | ||
144 | asmlinkage long parisc_ftruncate64(unsigned int fd, | |
145 | unsigned int high, unsigned int low) | |
146 | { | |
147 | return sys_ftruncate(fd, (long)high << 32 | low); | |
148 | } | |
149 | ||
150 | /* stubs for the benefit of the syscall_table since truncate64 and truncate | |
151 | * are identical on LP64 */ | |
152 | asmlinkage long sys_truncate64(const char __user * path, unsigned long length) | |
153 | { | |
154 | return sys_truncate(path, length); | |
155 | } | |
156 | asmlinkage long sys_ftruncate64(unsigned int fd, unsigned long length) | |
157 | { | |
158 | return sys_ftruncate(fd, length); | |
159 | } | |
160 | asmlinkage long sys_fcntl64(unsigned int fd, unsigned int cmd, unsigned long arg) | |
161 | { | |
162 | return sys_fcntl(fd, cmd, arg); | |
163 | } | |
164 | #else | |
165 | ||
166 | asmlinkage long parisc_truncate64(const char __user * path, | |
167 | unsigned int high, unsigned int low) | |
168 | { | |
169 | return sys_truncate64(path, (loff_t)high << 32 | low); | |
170 | } | |
171 | ||
172 | asmlinkage long parisc_ftruncate64(unsigned int fd, | |
173 | unsigned int high, unsigned int low) | |
174 | { | |
175 | return sys_ftruncate64(fd, (loff_t)high << 32 | low); | |
176 | } | |
177 | #endif | |
178 | ||
179 | asmlinkage ssize_t parisc_pread64(unsigned int fd, char __user *buf, size_t count, | |
180 | unsigned int high, unsigned int low) | |
181 | { | |
182 | return sys_pread64(fd, buf, count, (loff_t)high << 32 | low); | |
183 | } | |
184 | ||
185 | asmlinkage ssize_t parisc_pwrite64(unsigned int fd, const char __user *buf, | |
186 | size_t count, unsigned int high, unsigned int low) | |
187 | { | |
188 | return sys_pwrite64(fd, buf, count, (loff_t)high << 32 | low); | |
189 | } | |
190 | ||
191 | asmlinkage ssize_t parisc_readahead(int fd, unsigned int high, unsigned int low, | |
192 | size_t count) | |
193 | { | |
194 | return sys_readahead(fd, (loff_t)high << 32 | low, count); | |
195 | } | |
196 | ||
197 | asmlinkage long parisc_fadvise64_64(int fd, | |
198 | unsigned int high_off, unsigned int low_off, | |
199 | unsigned int high_len, unsigned int low_len, int advice) | |
200 | { | |
201 | return sys_fadvise64_64(fd, (loff_t)high_off << 32 | low_off, | |
202 | (loff_t)high_len << 32 | low_len, advice); | |
203 | } | |
204 | ||
6ca773cf KM |
205 | asmlinkage long parisc_sync_file_range(int fd, |
206 | u32 hi_off, u32 lo_off, u32 hi_nbytes, u32 lo_nbytes, | |
207 | unsigned int flags) | |
208 | { | |
209 | return sys_sync_file_range(fd, (loff_t)hi_off << 32 | lo_off, | |
210 | (loff_t)hi_nbytes << 32 | lo_nbytes, flags); | |
211 | } | |
212 | ||
1da177e4 LT |
213 | asmlinkage unsigned long sys_alloc_hugepages(int key, unsigned long addr, unsigned long len, int prot, int flag) |
214 | { | |
215 | return -ENOMEM; | |
216 | } | |
217 | ||
218 | asmlinkage int sys_free_hugepages(unsigned long addr) | |
219 | { | |
220 | return -EINVAL; | |
221 | } | |
75a49581 KM |
222 | |
223 | long parisc_personality(unsigned long personality) | |
224 | { | |
225 | long err; | |
226 | ||
227 | if (personality(current->personality) == PER_LINUX32 | |
5b24c421 JK |
228 | && personality(personality) == PER_LINUX) |
229 | personality = (personality & ~PER_MASK) | PER_LINUX32; | |
75a49581 KM |
230 | |
231 | err = sys_personality(personality); | |
5b24c421 JK |
232 | if (personality(err) == PER_LINUX32) |
233 | err = (err & ~PER_MASK) | PER_LINUX; | |
75a49581 KM |
234 | |
235 | return err; | |
236 | } |