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/syscalls.h>
33 #include <linux/utsname.h>
34 #include <linux/personality.h>
36 static unsigned long get_unshared_area(unsigned long addr, unsigned long len)
38 struct vm_area_struct *vma;
40 addr = PAGE_ALIGN(addr);
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)
46 if (!vma || addr + len <= vma->vm_start)
52 #define DCACHE_ALIGN(addr) (((addr) + (SHMLBA - 1)) &~ (SHMLBA - 1))
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...
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.
64 static int get_offset(struct address_space *mapping)
66 int offset = (unsigned long) mapping << (PAGE_SHIFT - 8);
67 return offset & 0x3FF000;
70 static unsigned long get_shared_area(struct address_space *mapping,
71 unsigned long addr, unsigned long len, unsigned long pgoff)
73 struct vm_area_struct *vma;
74 int offset = mapping ? get_offset(mapping) : 0;
76 addr = DCACHE_ALIGN(addr - offset) + offset;
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)
82 if (!vma || addr + len <= vma->vm_start)
84 addr = DCACHE_ALIGN(vma->vm_end - offset) + offset;
85 if (addr < vma->vm_end) /* handle wraparound */
90 unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
91 unsigned long len, unsigned long pgoff, unsigned long flags)
95 /* Might want to check for cache aliasing issues for MAP_FIXED case
96 * like ARM or MIPS ??? --BenH.
98 if (flags & MAP_FIXED)
101 addr = TASK_UNMAPPED_BASE;
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);
108 addr = get_unshared_area(addr, len);
113 static unsigned long do_mmap2(unsigned long addr, unsigned long len,
114 unsigned long prot, unsigned long flags, unsigned long fd,
117 struct file * file = NULL;
118 unsigned long error = -EBADF;
119 if (!(flags & MAP_ANONYMOUS)) {
125 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
127 down_write(¤t->mm->mmap_sem);
128 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
129 up_write(¤t->mm->mmap_sem);
137 asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len,
138 unsigned long prot, unsigned long flags, unsigned long fd,
141 /* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE
143 return do_mmap2(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT - 12));
146 asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
147 unsigned long prot, unsigned long flags, unsigned long fd,
148 unsigned long offset)
150 if (!(offset & ~PAGE_MASK)) {
151 return do_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
157 /* Fucking broken ABI */
160 asmlinkage long parisc_truncate64(const char __user * path,
161 unsigned int high, unsigned int low)
163 return sys_truncate(path, (long)high << 32 | low);
166 asmlinkage long parisc_ftruncate64(unsigned int fd,
167 unsigned int high, unsigned int low)
169 return sys_ftruncate(fd, (long)high << 32 | low);
172 /* stubs for the benefit of the syscall_table since truncate64 and truncate
173 * are identical on LP64 */
174 asmlinkage long sys_truncate64(const char __user * path, unsigned long length)
176 return sys_truncate(path, length);
178 asmlinkage long sys_ftruncate64(unsigned int fd, unsigned long length)
180 return sys_ftruncate(fd, length);
182 asmlinkage long sys_fcntl64(unsigned int fd, unsigned int cmd, unsigned long arg)
184 return sys_fcntl(fd, cmd, arg);
188 asmlinkage long parisc_truncate64(const char __user * path,
189 unsigned int high, unsigned int low)
191 return sys_truncate64(path, (loff_t)high << 32 | low);
194 asmlinkage long parisc_ftruncate64(unsigned int fd,
195 unsigned int high, unsigned int low)
197 return sys_ftruncate64(fd, (loff_t)high << 32 | low);
201 asmlinkage ssize_t parisc_pread64(unsigned int fd, char __user *buf, size_t count,
202 unsigned int high, unsigned int low)
204 return sys_pread64(fd, buf, count, (loff_t)high << 32 | low);
207 asmlinkage ssize_t parisc_pwrite64(unsigned int fd, const char __user *buf,
208 size_t count, unsigned int high, unsigned int low)
210 return sys_pwrite64(fd, buf, count, (loff_t)high << 32 | low);
213 asmlinkage ssize_t parisc_readahead(int fd, unsigned int high, unsigned int low,
216 return sys_readahead(fd, (loff_t)high << 32 | low, count);
219 asmlinkage long parisc_fadvise64_64(int fd,
220 unsigned int high_off, unsigned int low_off,
221 unsigned int high_len, unsigned int low_len, int advice)
223 return sys_fadvise64_64(fd, (loff_t)high_off << 32 | low_off,
224 (loff_t)high_len << 32 | low_len, advice);
227 asmlinkage long parisc_sync_file_range(int fd,
228 u32 hi_off, u32 lo_off, u32 hi_nbytes, u32 lo_nbytes,
231 return sys_sync_file_range(fd, (loff_t)hi_off << 32 | lo_off,
232 (loff_t)hi_nbytes << 32 | lo_nbytes, flags);
235 asmlinkage unsigned long sys_alloc_hugepages(int key, unsigned long addr, unsigned long len, int prot, int flag)
240 asmlinkage int sys_free_hugepages(unsigned long addr)
245 long parisc_personality(unsigned long personality)
249 if (personality(current->personality) == PER_LINUX32
250 && personality == PER_LINUX)
251 personality = PER_LINUX32;
253 err = sys_personality(personality);
254 if (err == PER_LINUX32)
260 long parisc_newuname(struct new_utsname __user *name)
262 int err = sys_newuname(name);
265 if (!err && personality(current->personality) == PER_LINUX32) {
266 if (__put_user(0, name->machine + 6) ||
267 __put_user(0, name->machine + 7))