Initial file dump from open source releaseHEADmaster

1 files changed, 237 insertions, 0 deletions

diff --git a/arch/parisc/kernel/sys_parisc.c b/arch/parisc/kernel/sys_parisc.c
new file mode 100644
index 00000000..0d3a9d49
--- /dev/null
+++ b/arch/parisc/kernel/sys_parisc.c
@@ -0,0 +1,237 @@
+
+/*
+ *    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_unmapped_area_info info;
+
+	info.flags = 0;
+	info.length = len;
+	info.low_limit = PAGE_ALIGN(addr);
+	info.high_limit = TASK_SIZE;
+	info.align_mask = 0;
+	info.align_offset = 0;
+	return vm_unmapped_area(&info);
+}
+
+/*
+ * 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)
+{
+	return (unsigned long) mapping >> 8;
+}
+
+static unsigned long shared_align_offset(struct file *filp, unsigned long pgoff)
+{
+	struct address_space *mapping = filp ? filp->f_mapping : NULL;
+
+	return (get_offset(mapping) + pgoff) << PAGE_SHIFT;
+}
+
+static unsigned long get_shared_area(struct file *filp, unsigned long addr,
+		unsigned long len, unsigned long pgoff)
+{
+	struct vm_unmapped_area_info info;
+
+	info.flags = 0;
+	info.length = len;
+	info.low_limit = PAGE_ALIGN(addr);
+	info.high_limit = TASK_SIZE;
+	info.align_mask = PAGE_MASK & (SHMLBA - 1);
+	info.align_offset = shared_align_offset(filp, pgoff);
+	return vm_unmapped_area(&info);
+}
+
+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 (flags & MAP_FIXED) {
+		if ((flags & MAP_SHARED) &&
+		    (addr - shared_align_offset(filp, pgoff)) & (SHMLBA - 1))
+			return -EINVAL;
+		return addr;
+	}
+	if (!addr)
+		addr = TASK_UNMAPPED_BASE;
+
+	if (filp || (flags & MAP_SHARED))
+		addr = get_shared_area(filp, 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 long parisc_fallocate(int fd, int mode, u32 offhi, u32 offlo,
+				u32 lenhi, u32 lenlo)
+{
+        return sys_fallocate(fd, mode, ((u64)offhi << 32) | offlo,
+                             ((u64)lenhi << 32) | lenlo);
+}
+
+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(personality) == PER_LINUX)
+		personality = (personality & ~PER_MASK) | PER_LINUX32;
+
+	err = sys_personality(personality);
+	if (personality(err) == PER_LINUX32)
+		err = (err & ~PER_MASK) | PER_LINUX;
+
+	return err;
+}