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 @@
+
+/*
+ *    PARISC specific syscalls
+ *
+ *    Copyright (C) 1999-2003 Matthew Wilcox <willy at parisc-linux.org>
+ *    Copyright (C) 2000-2003 Paul Bame <bame at parisc-linux.org>
+ *    Copyright (C) 2001 Thomas Bogendoerfer <tsbogend at parisc-linux.org>
+ *
+ *
+ *    This program is free software; you can redistribute it and/or modify
+ *    it under the terms of the GNU General Public License as published by
+ *    the Free Software Foundation; either version 2 of the License, or
+ *    (at your option) any later version.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU General Public License for more details.
+ *
+ *    You should have received a copy of the GNU General Public License
+ *    along with this program; if not, write to the Free Software
+ *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <asm/uaccess.h>
+#include <linux/file.h>
+#include <linux/fs.h>
+#include <linux/linkage.h>
+#include <linux/mm.h>
+#include <linux/mman.h>
+#include <linux/shm.h>
+#include <linux/smp_lock.h>
+#include <linux/syscalls.h>
+
+int sys_pipe(int __user *fildes)
+{
+        int fd[2];
+        int error;
+
+        error = do_pipe(fd);
+        if (!error) {
+                if (copy_to_user(fildes, fd, 2*sizeof(int)))
+                        error = -EFAULT;
+        }
+        return error;
+}
+
+static unsigned long get_unshared_area(unsigned long addr, unsigned long len)
+{
+        struct vm_area_struct *vma;
+
+        addr = PAGE_ALIGN(addr);
+
+        for (vma = find_vma(current->mm, addr); ; vma = vma->vm_next) {
+                /* At this point:  (!vma || addr < vma->vm_end). */
+                if (TASK_SIZE - len < addr)
+                        return -ENOMEM;
+                if (!vma || addr + len <= vma->vm_start)
+                        return addr;
+                addr = vma->vm_end;
+        }
+}
+
+#define DCACHE_ALIGN(addr) (((addr) + (SHMLBA - 1)) &~ (SHMLBA - 1))
+
+/*
+ * We need to know the offset to use.  Old scheme was to look for
+ * existing mapping and use the same offset.  New scheme is to use the
+ * address of the kernel data structure as the seed for the offset.
+ * We'll see how that works...
+ *
+ * The mapping is cacheline aligned, so there's no information in the bottom
+ * few bits of the address.  We're looking for 10 bits (4MB / 4k), so let's
+ * drop the bottom 8 bits and use bits 8-17.  
+ */
+static int get_offset(struct address_space *mapping)
+{
+        int offset = (unsigned long) mapping << (PAGE_SHIFT - 8);
+        return offset & 0x3FF000;
+}
+
+static unsigned long get_shared_area(struct address_space *mapping,
+                unsigned long addr, unsigned long len, unsigned long pgoff)
+{
+        struct vm_area_struct *vma;
+        int offset = mapping ? get_offset(mapping) : 0;
+
+        addr = DCACHE_ALIGN(addr - offset) + offset;
+
+        for (vma = find_vma(current->mm, addr); ; vma = vma->vm_next) {
+                /* At this point:  (!vma || addr < vma->vm_end). */
+                if (TASK_SIZE - len < addr)
+                        return -ENOMEM;
+                if (!vma || addr + len <= vma->vm_start)
+                        return addr;
+                addr = DCACHE_ALIGN(vma->vm_end - offset) + offset;
+                if (addr < vma->vm_end) /* handle wraparound */
+                        return -ENOMEM;
+        }
+}
+
+unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr,
+                unsigned long len, unsigned long pgoff, unsigned long flags)
+{
+        if (len > TASK_SIZE)
+                return -ENOMEM;
+        if (!addr)
+                addr = TASK_UNMAPPED_BASE;
+
+        if (filp) {
+                addr = get_shared_area(filp->f_mapping, addr, len, pgoff);
+        } else if(flags & MAP_SHARED) {
+                addr = get_shared_area(NULL, addr, len, pgoff);
+        } else {
+                addr = get_unshared_area(addr, len);
+        }
+        return addr;
+}
+
+static unsigned long do_mmap2(unsigned long addr, unsigned long len,
+        unsigned long prot, unsigned long flags, unsigned long fd,
+        unsigned long pgoff)
+{
+        struct file * file = NULL;
+        unsigned long error = -EBADF;
+        if (!(flags & MAP_ANONYMOUS)) {
+                file = fget(fd);
+                if (!file)
+                        goto out;
+        }
+
+        flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+
+        down_write(&current->mm->mmap_sem);
+        error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
+        up_write(&current->mm->mmap_sem);
+
+        if (file != NULL)
+                fput(file);
+out:
+        return error;
+}
+
+asmlinkage unsigned long sys_mmap2(unsigned long addr, unsigned long len,
+        unsigned long prot, unsigned long flags, unsigned long fd,
+        unsigned long pgoff)
+{
+        /* Make sure the shift for mmap2 is constant (12), no matter what PAGE_SIZE
+           we have. */
+        return do_mmap2(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT - 12));
+}
+
+asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
+                unsigned long prot, unsigned long flags, unsigned long fd,
+                unsigned long offset)
+{
+        if (!(offset & ~PAGE_MASK)) {
+                return do_mmap2(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
+        } else {
+                return -EINVAL;
+        }
+}
+
+long sys_shmat_wrapper(int shmid, char __user *shmaddr, int shmflag)
+{
+        unsigned long raddr;
+        int r;
+
+        r = do_shmat(shmid, shmaddr, shmflag, &raddr);
+        if (r < 0)
+                return r;
+        return raddr;
+}
+
+/* Fucking broken ABI */
+
+#ifdef CONFIG_64BIT
+asmlinkage long parisc_truncate64(const char __user * path,
+                                        unsigned int high, unsigned int low)
+{
+        return sys_truncate(path, (long)high << 32 | low);
+}
+
+asmlinkage long parisc_ftruncate64(unsigned int fd,
+                                        unsigned int high, unsigned int low)
+{
+        return sys_ftruncate(fd, (long)high << 32 | low);
+}
+
+/* stubs for the benefit of the syscall_table since truncate64 and truncate 
+ * are identical on LP64 */
+asmlinkage long sys_truncate64(const char __user * path, unsigned long length)
+{
+        return sys_truncate(path, length);
+}
+asmlinkage long sys_ftruncate64(unsigned int fd, unsigned long length)
+{
+        return sys_ftruncate(fd, length);
+}
+asmlinkage long sys_fcntl64(unsigned int fd, unsigned int cmd, unsigned long arg)
+{
+        return sys_fcntl(fd, cmd, arg);
+}
+#else
+
+asmlinkage long parisc_truncate64(const char __user * path,
+                                        unsigned int high, unsigned int low)
+{
+        return sys_truncate64(path, (loff_t)high << 32 | low);
+}
+
+asmlinkage long parisc_ftruncate64(unsigned int fd,
+                                        unsigned int high, unsigned int low)
+{
+        return sys_ftruncate64(fd, (loff_t)high << 32 | low);
+}
+#endif
+
+asmlinkage ssize_t parisc_pread64(unsigned int fd, char __user *buf, size_t count,
+                                        unsigned int high, unsigned int low)
+{
+        return sys_pread64(fd, buf, count, (loff_t)high << 32 | low);
+}
+
+asmlinkage ssize_t parisc_pwrite64(unsigned int fd, const char __user *buf,
+                        size_t count, unsigned int high, unsigned int low)
+{
+        return sys_pwrite64(fd, buf, count, (loff_t)high << 32 | low);
+}
+
+asmlinkage ssize_t parisc_readahead(int fd, unsigned int high, unsigned int low,
+                                    size_t count)
+{
+        return sys_readahead(fd, (loff_t)high << 32 | low, count);
+}
+
+asmlinkage long parisc_fadvise64_64(int fd,
+                        unsigned int high_off, unsigned int low_off,
+                        unsigned int high_len, unsigned int low_len, int advice)
+{
+        return sys_fadvise64_64(fd, (loff_t)high_off << 32 | low_off,
+                        (loff_t)high_len << 32 | low_len, advice);
+}
+
+asmlinkage unsigned long sys_alloc_hugepages(int key, unsigned long addr, unsigned long len, int prot, int flag)
+{
+        return -ENOMEM;
+}
+
+asmlinkage int sys_free_hugepages(unsigned long addr)
+{
+        return -EINVAL;
+}