1 files changed, 298 insertions, 0 deletions

diff --git a/arch/ia64/kernel/sys_ia64.c b/arch/ia64/kernel/sys_ia64.c
new file mode 100644
index 000000000000..3ac216e1c8bb
--- /dev/null
+++ b/arch/ia64/kernel/sys_ia64.c
@@ -0,0 +1,298 @@
+/*
+ * This file contains various system calls that have different calling
+ * conventions on different platforms.
+ *
+ * Copyright (C) 1999-2000, 2002-2003, 2005 Hewlett-Packard Co
+ *      David Mosberger-Tang <davidm@hpl.hp.com>
+ */
+#include <linux/config.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/mman.h>
+#include <linux/sched.h>
+#include <linux/shm.h>
+#include <linux/file.h>         /* doh, must come after sched.h... */
+#include <linux/smp.h>
+#include <linux/smp_lock.h>
+#include <linux/syscalls.h>
+#include <linux/highuid.h>
+#include <linux/hugetlb.h>
+
+#include <asm/shmparam.h>
+#include <asm/uaccess.h>
+
+unsigned long
+arch_get_unmapped_area (struct file *filp, unsigned long addr, unsigned long len,
+                        unsigned long pgoff, unsigned long flags)
+{
+        long map_shared = (flags & MAP_SHARED);
+        unsigned long start_addr, align_mask = PAGE_SIZE - 1;
+        struct mm_struct *mm = current->mm;
+        struct vm_area_struct *vma;
+
+        if (len > RGN_MAP_LIMIT)
+                return -ENOMEM;
+
+#ifdef CONFIG_HUGETLB_PAGE
+        if (REGION_NUMBER(addr) == REGION_HPAGE)
+                addr = 0;
+#endif
+        if (!addr)
+                addr = mm->free_area_cache;
+
+        if (map_shared && (TASK_SIZE > 0xfffffffful))
+                /*
+                 * For 64-bit tasks, align shared segments to 1MB to avoid potential
+                 * performance penalty due to virtual aliasing (see ASDM).  For 32-bit
+                 * tasks, we prefer to avoid exhausting the address space too quickly by
+                 * limiting alignment to a single page.
+                 */
+                align_mask = SHMLBA - 1;
+
+  full_search:
+        start_addr = addr = (addr + align_mask) & ~align_mask;
+
+        for (vma = find_vma(mm, addr); ; vma = vma->vm_next) {
+                /* At this point:  (!vma || addr < vma->vm_end). */
+                if (TASK_SIZE - len < addr || RGN_MAP_LIMIT - len < REGION_OFFSET(addr)) {
+                        if (start_addr != TASK_UNMAPPED_BASE) {
+                                /* Start a new search --- just in case we missed some holes.  */
+                                addr = TASK_UNMAPPED_BASE;
+                                goto full_search;
+                        }
+                        return -ENOMEM;
+                }
+                if (!vma || addr + len <= vma->vm_start) {
+                        /* Remember the address where we stopped this search:  */
+                        mm->free_area_cache = addr + len;
+                        return addr;
+                }
+                addr = (vma->vm_end + align_mask) & ~align_mask;
+        }
+}
+
+asmlinkage long
+ia64_getpriority (int which, int who)
+{
+        long prio;
+
+        prio = sys_getpriority(which, who);
+        if (prio >= 0) {
+                force_successful_syscall_return();
+                prio = 20 - prio;
+        }
+        return prio;
+}
+
+/* XXX obsolete, but leave it here until the old libc is gone... */
+asmlinkage unsigned long
+sys_getpagesize (void)
+{
+        return PAGE_SIZE;
+}
+
+asmlinkage unsigned long
+ia64_shmat (int shmid, void __user *shmaddr, int shmflg)
+{
+        unsigned long raddr;
+        int retval;
+
+        retval = do_shmat(shmid, shmaddr, shmflg, &raddr);
+        if (retval < 0)
+                return retval;
+
+        force_successful_syscall_return();
+        return raddr;
+}
+
+asmlinkage unsigned long
+ia64_brk (unsigned long brk)
+{
+        unsigned long rlim, retval, newbrk, oldbrk;
+        struct mm_struct *mm = current->mm;
+
+        /*
+         * Most of this replicates the code in sys_brk() except for an additional safety
+         * check and the clearing of r8.  However, we can't call sys_brk() because we need
+         * to acquire the mmap_sem before we can do the test...
+         */
+        down_write(&mm->mmap_sem);
+
+        if (brk < mm->end_code)
+                goto out;
+        newbrk = PAGE_ALIGN(brk);
+        oldbrk = PAGE_ALIGN(mm->brk);
+        if (oldbrk == newbrk)
+                goto set_brk;
+
+        /* Always allow shrinking brk. */
+        if (brk <= mm->brk) {
+                if (!do_munmap(mm, newbrk, oldbrk-newbrk))
+                        goto set_brk;
+                goto out;
+        }
+
+        /* Check against unimplemented/unmapped addresses: */
+        if ((newbrk - oldbrk) > RGN_MAP_LIMIT || REGION_OFFSET(newbrk) > RGN_MAP_LIMIT)
+                goto out;
+
+        /* Check against rlimit.. */
+        rlim = current->signal->rlim[RLIMIT_DATA].rlim_cur;
+        if (rlim < RLIM_INFINITY && brk - mm->start_data > rlim)
+                goto out;
+
+        /* Check against existing mmap mappings. */
+        if (find_vma_intersection(mm, oldbrk, newbrk+PAGE_SIZE))
+                goto out;
+
+        /* Ok, looks good - let it rip. */
+        if (do_brk(oldbrk, newbrk-oldbrk) != oldbrk)
+                goto out;
+set_brk:
+        mm->brk = brk;
+out:
+        retval = mm->brk;
+        up_write(&mm->mmap_sem);
+        force_successful_syscall_return();
+        return retval;
+}
+
+/*
+ * On IA-64, we return the two file descriptors in ret0 and ret1 (r8
+ * and r9) as this is faster than doing a copy_to_user().
+ */
+asmlinkage long
+sys_pipe (void)
+{
+        struct pt_regs *regs = ia64_task_regs(current);
+        int fd[2];
+        int retval;
+
+        retval = do_pipe(fd);
+        if (retval)
+                goto out;
+        retval = fd[0];
+        regs->r9 = fd[1];
+  out:
+        return retval;
+}
+
+static inline unsigned long
+do_mmap2 (unsigned long addr, unsigned long len, int prot, int flags, int fd, unsigned long pgoff)
+{
+        unsigned long roff;
+        struct file *file = NULL;
+
+        flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+        if (!(flags & MAP_ANONYMOUS)) {
+                file = fget(fd);
+                if (!file)
+                        return -EBADF;
+
+                if (!file->f_op || !file->f_op->mmap) {
+                        addr = -ENODEV;
+                        goto out;
+                }
+        }
+
+        /*
+         * A zero mmap always succeeds in Linux, independent of whether or not the
+         * remaining arguments are valid.
+         */
+        if (len == 0)
+                goto out;
+
+        /* Careful about overflows.. */
+        len = PAGE_ALIGN(len);
+        if (!len || len > TASK_SIZE) {
+                addr = -EINVAL;
+                goto out;
+        }
+
+        /*
+         * Don't permit mappings into unmapped space, the virtual page table of a region,
+         * or across a region boundary.  Note: RGN_MAP_LIMIT is equal to 2^n-PAGE_SIZE
+         * (for some integer n <= 61) and len > 0.
+         */
+        roff = REGION_OFFSET(addr);
+        if ((len > RGN_MAP_LIMIT) || (roff > (RGN_MAP_LIMIT - len))) {
+                addr = -EINVAL;
+                goto out;
+        }
+
+        down_write(&current->mm->mmap_sem);
+        addr = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
+        up_write(&current->mm->mmap_sem);
+
+out:    if (file)
+                fput(file);
+        return addr;
+}
+
+/*
+ * mmap2() is like mmap() except that the offset is expressed in units
+ * of PAGE_SIZE (instead of bytes).  This allows to mmap2() (pieces
+ * of) files that are larger than the address space of the CPU.
+ */
+asmlinkage unsigned long
+sys_mmap2 (unsigned long addr, unsigned long len, int prot, int flags, int fd, long pgoff)
+{
+        addr = do_mmap2(addr, len, prot, flags, fd, pgoff);
+        if (!IS_ERR((void *) addr))
+                force_successful_syscall_return();
+        return addr;
+}
+
+asmlinkage unsigned long
+sys_mmap (unsigned long addr, unsigned long len, int prot, int flags, int fd, long off)
+{
+        if (offset_in_page(off) != 0)
+                return -EINVAL;
+
+        addr = do_mmap2(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
+        if (!IS_ERR((void *) addr))
+                force_successful_syscall_return();
+        return addr;
+}
+
+asmlinkage unsigned long
+ia64_mremap (unsigned long addr, unsigned long old_len, unsigned long new_len, unsigned long flags,
+             unsigned long new_addr)
+{
+        extern unsigned long do_mremap (unsigned long addr,
+                                        unsigned long old_len,
+                                        unsigned long new_len,
+                                        unsigned long flags,
+                                        unsigned long new_addr);
+
+        down_write(&current->mm->mmap_sem);
+        {
+                addr = do_mremap(addr, old_len, new_len, flags, new_addr);
+        }
+        up_write(&current->mm->mmap_sem);
+
+        if (IS_ERR((void *) addr))
+                return addr;
+
+        force_successful_syscall_return();
+        return addr;
+}
+
+#ifndef CONFIG_PCI
+
+asmlinkage long
+sys_pciconfig_read (unsigned long bus, unsigned long dfn, unsigned long off, unsigned long len,
+                    void *buf)
+{
+        return -ENOSYS;
+}
+
+asmlinkage long
+sys_pciconfig_write (unsigned long bus, unsigned long dfn, unsigned long off, unsigned long len,
+                     void *buf)
+{
+        return -ENOSYS;
+}
+
+#endif /* CONFIG_PCI */