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>
35 int sys_pipe(int *fildes)
42 if (copy_to_user(fildes, fd, 2*sizeof(int)))
48 static unsigned long get_unshared_area(unsigned long addr, unsigned long len)
50 struct vm_area_struct *vma;
52 addr = PAGE_ALIGN(addr);
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)
58 if (!vma || addr + len <= vma->vm_start)
64 #define DCACHE_ALIGN(addr) (((addr) + (SHMLBA - 1)) &~ (SHMLBA - 1))
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...
73 static int get_offset(struct address_space *mapping)
75 struct vm_area_struct *vma = list_entry(mapping->i_mmap_shared.next,
76 struct vm_area_struct, shared);
77 return (vma->vm_start + ((pgoff - vma->vm_pgoff) << PAGE_SHIFT)) &
81 /* The mapping is cacheline aligned, so there's no information in the bottom
82 * few bits of the address. We're looking for 10 bits (4MB / 4k), so let's
83 * drop the bottom 8 bits and use bits 8-17.
85 static int get_offset(struct address_space *mapping)
87 int offset = (unsigned long) mapping << (PAGE_SHIFT - 8);
88 return offset & 0x3FF000;
92 static unsigned long get_shared_area(struct address_space *mapping,
93 unsigned long addr, unsigned long len, unsigned long pgoff)
95 struct vm_area_struct *vma;
96 int offset = get_offset(mapping);
98 addr = DCACHE_ALIGN(addr - offset) + offset;
100 for (vma = find_vma(current->mm, addr); ; vma = vma->vm_next) {
101 /* At this point: (!vma || addr < vma->vm_end). */
102 if (TASK_SIZE - len < addr)
104 if (!vma || addr + len <= vma->vm_start)
106 addr = DCACHE_ALIGN(vma->vm_end - offset) + offset;
107 if (addr < vma->vm_end) /* handle wraparound */
112 unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
113 unsigned long len, unsigned long pgoff, unsigned long flags)
118 addr = TASK_UNMAPPED_BASE;
120 if (filp && (flags & MAP_SHARED)) {
121 addr = get_shared_area(filp->f_mapping, addr, len, pgoff);
123 addr = get_unshared_area(addr, len);
128 static unsigned long do_mmap2(unsigned long addr, unsigned long len,
129 unsigned long prot, unsigned long flags, unsigned long fd,
132 struct file * file = NULL;
133 unsigned long error = -EBADF;
134 if (!(flags & MAP_ANONYMOUS)) {
140 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
142 down_write(¤t->mm->mmap_sem);
143 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
144 up_write(¤t->mm->mmap_sem);
152 asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len,
153 unsigned long prot, unsigned long flags, unsigned long fd,
156 /* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE
158 return do_mmap2(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT - 12));
161 asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
162 unsigned long prot, unsigned long flags, unsigned long fd,
163 unsigned long offset)
165 if (!(offset & ~PAGE_MASK)) {
166 return do_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
172 long sys_shmat_wrapper(int shmid, char *shmaddr, int shmflag)
177 r = do_shmat(shmid, shmaddr, shmflag, &raddr);
183 /* Fucking broken ABI */
185 #ifdef CONFIG_PARISC64
186 asmlinkage long parisc_truncate64(const char * path,
187 unsigned int high, unsigned int low)
189 return sys_truncate(path, (long)high << 32 | low);
192 asmlinkage long parisc_ftruncate64(unsigned int fd,
193 unsigned int high, unsigned int low)
195 return sys_ftruncate(fd, (long)high << 32 | low);
198 /* stubs for the benefit of the syscall_table since truncate64 and truncate
199 * are identical on LP64 */
200 asmlinkage long sys_truncate64(const char * path, unsigned long length)
202 return sys_truncate(path, length);
204 asmlinkage long sys_ftruncate64(unsigned int fd, unsigned long length)
206 return sys_ftruncate(fd, length);
208 asmlinkage long sys_fcntl64(unsigned int fd, unsigned int cmd, unsigned long arg)
210 return sys_fcntl(fd, cmd, arg);
214 asmlinkage long parisc_truncate64(const char * path,
215 unsigned int high, unsigned int low)
217 return sys_truncate64(path, (loff_t)high << 32 | low);
220 asmlinkage long parisc_ftruncate64(unsigned int fd,
221 unsigned int high, unsigned int low)
223 return sys_ftruncate64(fd, (loff_t)high << 32 | low);
227 asmlinkage ssize_t parisc_pread64(unsigned int fd, char *buf, size_t count,
228 unsigned int high, unsigned int low)
230 return sys_pread64(fd, buf, count, (loff_t)high << 32 | low);
233 asmlinkage ssize_t parisc_pwrite64(unsigned int fd, const char *buf,
234 size_t count, unsigned int high, unsigned int low)
236 return sys_pwrite64(fd, buf, count, (loff_t)high << 32 | low);
239 asmlinkage ssize_t parisc_readahead(int fd, unsigned int high, unsigned int low,
242 return sys_readahead(fd, (loff_t)high << 32 | low, count);
245 asmlinkage unsigned long sys_alloc_hugepages(int key, unsigned long addr, unsigned long len, int prot, int flag)
250 asmlinkage int sys_free_hugepages(unsigned long addr)