diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/parisc/kernel/sys_parisc.c |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/parisc/kernel/sys_parisc.c')
-rw-r--r-- | arch/parisc/kernel/sys_parisc.c | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/arch/parisc/kernel/sys_parisc.c b/arch/parisc/kernel/sys_parisc.c new file mode 100644 index 000000000000..7958cd8c8bf8 --- /dev/null +++ b/arch/parisc/kernel/sys_parisc.c | |||
@@ -0,0 +1,253 @@ | |||
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> | ||
32 | #include <linux/smp_lock.h> | ||
33 | #include <linux/syscalls.h> | ||
34 | |||
35 | int sys_pipe(int __user *fildes) | ||
36 | { | ||
37 | int fd[2]; | ||
38 | int error; | ||
39 | |||
40 | error = do_pipe(fd); | ||
41 | if (!error) { | ||
42 | if (copy_to_user(fildes, fd, 2*sizeof(int))) | ||
43 | error = -EFAULT; | ||
44 | } | ||
45 | return error; | ||
46 | } | ||
47 | |||
48 | static unsigned long get_unshared_area(unsigned long addr, unsigned long len) | ||
49 | { | ||
50 | struct vm_area_struct *vma; | ||
51 | |||
52 | addr = PAGE_ALIGN(addr); | ||
53 | |||
54 | for (vma = find_vma(current->mm, addr); ; vma = vma->vm_next) { | ||
55 | /* At this point: (!vma || addr < vma->vm_end). */ | ||
56 | if (TASK_SIZE - len < addr) | ||
57 | return -ENOMEM; | ||
58 | if (!vma || addr + len <= vma->vm_start) | ||
59 | return addr; | ||
60 | addr = vma->vm_end; | ||
61 | } | ||
62 | } | ||
63 | |||
64 | #define DCACHE_ALIGN(addr) (((addr) + (SHMLBA - 1)) &~ (SHMLBA - 1)) | ||
65 | |||
66 | /* | ||
67 | * We need to know the offset to use. Old scheme was to look for | ||
68 | * existing mapping and use the same offset. New scheme is to use the | ||
69 | * address of the kernel data structure as the seed for the offset. | ||
70 | * We'll see how that works... | ||
71 | * | ||
72 | * The mapping is cacheline aligned, so there's no information in the bottom | ||
73 | * few bits of the address. We're looking for 10 bits (4MB / 4k), so let's | ||
74 | * drop the bottom 8 bits and use bits 8-17. | ||
75 | */ | ||
76 | static int get_offset(struct address_space *mapping) | ||
77 | { | ||
78 | int offset = (unsigned long) mapping << (PAGE_SHIFT - 8); | ||
79 | return offset & 0x3FF000; | ||
80 | } | ||
81 | |||
82 | static unsigned long get_shared_area(struct address_space *mapping, | ||
83 | unsigned long addr, unsigned long len, unsigned long pgoff) | ||
84 | { | ||
85 | struct vm_area_struct *vma; | ||
86 | int offset = mapping ? get_offset(mapping) : 0; | ||
87 | |||
88 | addr = DCACHE_ALIGN(addr - offset) + offset; | ||
89 | |||
90 | for (vma = find_vma(current->mm, addr); ; vma = vma->vm_next) { | ||
91 | /* At this point: (!vma || addr < vma->vm_end). */ | ||
92 | if (TASK_SIZE - len < addr) | ||
93 | return -ENOMEM; | ||
94 | if (!vma || addr + len <= vma->vm_start) | ||
95 | return addr; | ||
96 | addr = DCACHE_ALIGN(vma->vm_end - offset) + offset; | ||
97 | if (addr < vma->vm_end) /* handle wraparound */ | ||
98 | return -ENOMEM; | ||
99 | } | ||
100 | } | ||
101 | |||
102 | unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, | ||
103 | unsigned long len, unsigned long pgoff, unsigned long flags) | ||
104 | { | ||
105 | if (len > TASK_SIZE) | ||
106 | return -ENOMEM; | ||
107 | if (!addr) | ||
108 | addr = TASK_UNMAPPED_BASE; | ||
109 | |||
110 | if (filp) { | ||
111 | addr = get_shared_area(filp->f_mapping, addr, len, pgoff); | ||
112 | } else if(flags & MAP_SHARED) { | ||
113 | addr = get_shared_area(NULL, addr, len, pgoff); | ||
114 | } else { | ||
115 | addr = get_unshared_area(addr, len); | ||
116 | } | ||
117 | return addr; | ||
118 | } | ||
119 | |||
120 | static unsigned long do_mmap2(unsigned long addr, unsigned long len, | ||
121 | unsigned long prot, unsigned long flags, unsigned long fd, | ||
122 | unsigned long pgoff) | ||
123 | { | ||
124 | struct file * file = NULL; | ||
125 | unsigned long error = -EBADF; | ||
126 | if (!(flags & MAP_ANONYMOUS)) { | ||
127 | file = fget(fd); | ||
128 | if (!file) | ||
129 | goto out; | ||
130 | } | ||
131 | |||
132 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | ||
133 | |||
134 | down_write(¤t->mm->mmap_sem); | ||
135 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); | ||
136 | up_write(¤t->mm->mmap_sem); | ||
137 | |||
138 | if (file != NULL) | ||
139 | fput(file); | ||
140 | out: | ||
141 | return error; | ||
142 | } | ||
143 | |||
144 | asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len, | ||
145 | unsigned long prot, unsigned long flags, unsigned long fd, | ||
146 | unsigned long pgoff) | ||
147 | { | ||
148 | /* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE | ||
149 | we have. */ | ||
150 | return do_mmap2(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT - 12)); | ||
151 | } | ||
152 | |||
153 | asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len, | ||
154 | unsigned long prot, unsigned long flags, unsigned long fd, | ||
155 | unsigned long offset) | ||
156 | { | ||
157 | if (!(offset & ~PAGE_MASK)) { | ||
158 | return do_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT); | ||
159 | } else { | ||
160 | return -EINVAL; | ||
161 | } | ||
162 | } | ||
163 | |||
164 | long sys_shmat_wrapper(int shmid, char __user *shmaddr, int shmflag) | ||
165 | { | ||
166 | unsigned long raddr; | ||
167 | int r; | ||
168 | |||
169 | r = do_shmat(shmid, shmaddr, shmflag, &raddr); | ||
170 | if (r < 0) | ||
171 | return r; | ||
172 | return raddr; | ||
173 | } | ||
174 | |||
175 | /* Fucking broken ABI */ | ||
176 | |||
177 | #ifdef CONFIG_64BIT | ||
178 | asmlinkage long parisc_truncate64(const char __user * path, | ||
179 | unsigned int high, unsigned int low) | ||
180 | { | ||
181 | return sys_truncate(path, (long)high << 32 | low); | ||
182 | } | ||
183 | |||
184 | asmlinkage long parisc_ftruncate64(unsigned int fd, | ||
185 | unsigned int high, unsigned int low) | ||
186 | { | ||
187 | return sys_ftruncate(fd, (long)high << 32 | low); | ||
188 | } | ||
189 | |||
190 | /* stubs for the benefit of the syscall_table since truncate64 and truncate | ||
191 | * are identical on LP64 */ | ||
192 | asmlinkage long sys_truncate64(const char __user * path, unsigned long length) | ||
193 | { | ||
194 | return sys_truncate(path, length); | ||
195 | } | ||
196 | asmlinkage long sys_ftruncate64(unsigned int fd, unsigned long length) | ||
197 | { | ||
198 | return sys_ftruncate(fd, length); | ||
199 | } | ||
200 | asmlinkage long sys_fcntl64(unsigned int fd, unsigned int cmd, unsigned long arg) | ||
201 | { | ||
202 | return sys_fcntl(fd, cmd, arg); | ||
203 | } | ||
204 | #else | ||
205 | |||
206 | asmlinkage long parisc_truncate64(const char __user * path, | ||
207 | unsigned int high, unsigned int low) | ||
208 | { | ||
209 | return sys_truncate64(path, (loff_t)high << 32 | low); | ||
210 | } | ||
211 | |||
212 | asmlinkage long parisc_ftruncate64(unsigned int fd, | ||
213 | unsigned int high, unsigned int low) | ||
214 | { | ||
215 | return sys_ftruncate64(fd, (loff_t)high << 32 | low); | ||
216 | } | ||
217 | #endif | ||
218 | |||
219 | asmlinkage ssize_t parisc_pread64(unsigned int fd, char __user *buf, size_t count, | ||
220 | unsigned int high, unsigned int low) | ||
221 | { | ||
222 | return sys_pread64(fd, buf, count, (loff_t)high << 32 | low); | ||
223 | } | ||
224 | |||
225 | asmlinkage ssize_t parisc_pwrite64(unsigned int fd, const char __user *buf, | ||
226 | size_t count, unsigned int high, unsigned int low) | ||
227 | { | ||
228 | return sys_pwrite64(fd, buf, count, (loff_t)high << 32 | low); | ||
229 | } | ||
230 | |||
231 | asmlinkage ssize_t parisc_readahead(int fd, unsigned int high, unsigned int low, | ||
232 | size_t count) | ||
233 | { | ||
234 | return sys_readahead(fd, (loff_t)high << 32 | low, count); | ||
235 | } | ||
236 | |||
237 | asmlinkage long parisc_fadvise64_64(int fd, | ||
238 | unsigned int high_off, unsigned int low_off, | ||
239 | unsigned int high_len, unsigned int low_len, int advice) | ||
240 | { | ||
241 | return sys_fadvise64_64(fd, (loff_t)high_off << 32 | low_off, | ||
242 | (loff_t)high_len << 32 | low_len, advice); | ||
243 | } | ||
244 | |||
245 | asmlinkage unsigned long sys_alloc_hugepages(int key, unsigned long addr, unsigned long len, int prot, int flag) | ||
246 | { | ||
247 | return -ENOMEM; | ||
248 | } | ||
249 | |||
250 | asmlinkage int sys_free_hugepages(unsigned long addr) | ||
251 | { | ||
252 | return -EINVAL; | ||
253 | } | ||