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-rw-r--r--arch/parisc/kernel/sys_parisc.c236
1 files changed, 236 insertions, 0 deletions
diff --git a/arch/parisc/kernel/sys_parisc.c b/arch/parisc/kernel/sys_parisc.c
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index 00000000000..c9b932260f4
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+++ b/arch/parisc/kernel/sys_parisc.c
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+
+/*
+ * 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/syscalls.h>
+#include <linux/utsname.h>
+#include <linux/personality.h>
+
+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;
+ /* Might want to check for cache aliasing issues for MAP_FIXED case
+ * like ARM or MIPS ??? --BenH.
+ */
+ if (flags & MAP_FIXED)
+ return addr;
+ 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;
+}
+
+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 sys_mmap_pgoff(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 sys_mmap_pgoff(addr, len, prot, flags, fd,
+ offset >> PAGE_SHIFT);
+ } else {
+ return -EINVAL;
+ }
+}
+
+/* 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 long parisc_sync_file_range(int fd,
+ u32 hi_off, u32 lo_off, u32 hi_nbytes, u32 lo_nbytes,
+ unsigned int flags)
+{
+ return sys_sync_file_range(fd, (loff_t)hi_off << 32 | lo_off,
+ (loff_t)hi_nbytes << 32 | lo_nbytes, flags);
+}
+
+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;
+}
+
+long parisc_personality(unsigned long personality)
+{
+ long err;
+
+ if (personality(current->personality) == PER_LINUX32
+ && personality == PER_LINUX)
+ personality = PER_LINUX32;
+
+ err = sys_personality(personality);
+ if (err == PER_LINUX32)
+ err = PER_LINUX;
+
+ return err;
+}