3 * PARISC specific syscalls
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>
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.
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.
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
25 #include <asm/uaccess.h>
26 #include <linux/file.h>
28 #include <linux/linkage.h>
30 #include <linux/mman.h>
31 #include <linux/shm.h>
32 #include <linux/smp_lock.h>
33 #include <linux/syscalls.h>
34 #include <linux/utsname.h>
35 #include <linux/personality.h>
37 int sys_pipe(int __user *fildes)
44 if (copy_to_user(fildes, fd, 2*sizeof(int)))
50 static unsigned long get_unshared_area(unsigned long addr, unsigned long len)
52 struct vm_area_struct *vma;
54 addr = PAGE_ALIGN(addr);
56 for (vma = find_vma(current->mm, addr); ; vma = vma->vm_next) {
57 /* At this point: (!vma || addr < vma->vm_end). */
58 if (TASK_SIZE - len < addr)
60 if (!vma || addr + len <= vma->vm_start)
66 #define DCACHE_ALIGN(addr) (((addr) + (SHMLBA - 1)) &~ (SHMLBA - 1))
69 * We need to know the offset to use. Old scheme was to look for
70 * existing mapping and use the same offset. New scheme is to use the
71 * address of the kernel data structure as the seed for the offset.
72 * We'll see how that works...
74 * The mapping is cacheline aligned, so there's no information in the bottom
75 * few bits of the address. We're looking for 10 bits (4MB / 4k), so let's
76 * drop the bottom 8 bits and use bits 8-17.
78 static int get_offset(struct address_space *mapping)
80 int offset = (unsigned long) mapping << (PAGE_SHIFT - 8);
81 return offset & 0x3FF000;
84 static unsigned long get_shared_area(struct address_space *mapping,
85 unsigned long addr, unsigned long len, unsigned long pgoff)
87 struct vm_area_struct *vma;
88 int offset = mapping ? get_offset(mapping) : 0;
90 addr = DCACHE_ALIGN(addr - offset) + offset;
92 for (vma = find_vma(current->mm, addr); ; vma = vma->vm_next) {
93 /* At this point: (!vma || addr < vma->vm_end). */
94 if (TASK_SIZE - len < addr)
96 if (!vma || addr + len <= vma->vm_start)
98 addr = DCACHE_ALIGN(vma->vm_end - offset) + offset;
99 if (addr < vma->vm_end) /* handle wraparound */
104 unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
105 unsigned long len, unsigned long pgoff, unsigned long flags)
110 addr = TASK_UNMAPPED_BASE;
113 addr = get_shared_area(filp->f_mapping, addr, len, pgoff);
114 } else if(flags & MAP_SHARED) {
115 addr = get_shared_area(NULL, addr, len, pgoff);
117 addr = get_unshared_area(addr, len);
122 static unsigned long do_mmap2(unsigned long addr, unsigned long len,
123 unsigned long prot, unsigned long flags, unsigned long fd,
126 struct file * file = NULL;
127 unsigned long error = -EBADF;
128 if (!(flags & MAP_ANONYMOUS)) {
134 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
136 down_write(¤t->mm->mmap_sem);
137 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
138 up_write(¤t->mm->mmap_sem);
146 asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len,
147 unsigned long prot, unsigned long flags, unsigned long fd,
150 /* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE
152 return do_mmap2(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT - 12));
155 asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
156 unsigned long prot, unsigned long flags, unsigned long fd,
157 unsigned long offset)
159 if (!(offset & ~PAGE_MASK)) {
160 return do_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
166 /* Fucking broken ABI */
169 asmlinkage long parisc_truncate64(const char __user * path,
170 unsigned int high, unsigned int low)
172 return sys_truncate(path, (long)high << 32 | low);
175 asmlinkage long parisc_ftruncate64(unsigned int fd,
176 unsigned int high, unsigned int low)
178 return sys_ftruncate(fd, (long)high << 32 | low);
181 /* stubs for the benefit of the syscall_table since truncate64 and truncate
182 * are identical on LP64 */
183 asmlinkage long sys_truncate64(const char __user * path, unsigned long length)
185 return sys_truncate(path, length);
187 asmlinkage long sys_ftruncate64(unsigned int fd, unsigned long length)
189 return sys_ftruncate(fd, length);
191 asmlinkage long sys_fcntl64(unsigned int fd, unsigned int cmd, unsigned long arg)
193 return sys_fcntl(fd, cmd, arg);
197 asmlinkage long parisc_truncate64(const char __user * path,
198 unsigned int high, unsigned int low)
200 return sys_truncate64(path, (loff_t)high << 32 | low);
203 asmlinkage long parisc_ftruncate64(unsigned int fd,
204 unsigned int high, unsigned int low)
206 return sys_ftruncate64(fd, (loff_t)high << 32 | low);
210 asmlinkage ssize_t parisc_pread64(unsigned int fd, char __user *buf, size_t count,
211 unsigned int high, unsigned int low)
213 return sys_pread64(fd, buf, count, (loff_t)high << 32 | low);
216 asmlinkage ssize_t parisc_pwrite64(unsigned int fd, const char __user *buf,
217 size_t count, unsigned int high, unsigned int low)
219 return sys_pwrite64(fd, buf, count, (loff_t)high << 32 | low);
222 asmlinkage ssize_t parisc_readahead(int fd, unsigned int high, unsigned int low,
225 return sys_readahead(fd, (loff_t)high << 32 | low, count);
228 asmlinkage long parisc_fadvise64_64(int fd,
229 unsigned int high_off, unsigned int low_off,
230 unsigned int high_len, unsigned int low_len, int advice)
232 return sys_fadvise64_64(fd, (loff_t)high_off << 32 | low_off,
233 (loff_t)high_len << 32 | low_len, advice);
236 asmlinkage long parisc_sync_file_range(int fd,
237 u32 hi_off, u32 lo_off, u32 hi_nbytes, u32 lo_nbytes,
240 return sys_sync_file_range(fd, (loff_t)hi_off << 32 | lo_off,
241 (loff_t)hi_nbytes << 32 | lo_nbytes, flags);
244 asmlinkage unsigned long sys_alloc_hugepages(int key, unsigned long addr, unsigned long len, int prot, int flag)
249 asmlinkage int sys_free_hugepages(unsigned long addr)
254 long parisc_personality(unsigned long personality)
258 if (personality(current->personality) == PER_LINUX32
259 && personality == PER_LINUX)
260 personality = PER_LINUX32;
262 err = sys_personality(personality);
263 if (err == PER_LINUX32)
269 static inline int override_machine(char __user *mach) {
271 if (personality(current->personality) == PER_LINUX32) {
272 if (__put_user(0, mach + 6) ||
273 __put_user(0, mach + 7))
278 #else /*!CONFIG_COMPAT*/
280 #endif /*CONFIG_COMPAT*/
283 long parisc_newuname(struct new_utsname __user *utsname)
288 if (copy_to_user(utsname, &system_utsname, sizeof(*utsname)))
292 err = override_machine(utsname->machine);