1/*
2 * linux/arch/sh/kernel/sys_sh.c
3 *
4 * This file contains various random system calls that
5 * have a non-standard calling sequence on the Linux/SuperH
6 * platform.
7 *
8 * Taken from i386 version.
9 */
10#include <linux/errno.h>
11#include <linux/sched.h>
12#include <linux/mm.h>
13#include <linux/smp.h>
14#include <linux/sem.h>
15#include <linux/msg.h>
16#include <linux/shm.h>
17#include <linux/stat.h>
18#include <linux/syscalls.h>
19#include <linux/mman.h>
20#include <linux/file.h>
21#include <linux/utsname.h>
22#include <linux/module.h>
23#include <linux/fs.h>
24#include <linux/ipc.h>
25#include <asm/syscalls.h>
26#include <asm/uaccess.h>
27#include <asm/unistd.h>
28#include <asm/cacheflush.h>
29#include <asm/cachectl.h>
30
31asmlinkage int old_mmap(unsigned long addr, unsigned long len,
32	unsigned long prot, unsigned long flags,
33	int fd, unsigned long off)
34{
35	if (off & ~PAGE_MASK)
36		return -EINVAL;
37	return sys_mmap_pgoff(addr, len, prot, flags, fd, off>>PAGE_SHIFT);
38}
39
40asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
41	unsigned long prot, unsigned long flags,
42	unsigned long fd, unsigned long pgoff)
43{
44	/*
45	 * The shift for mmap2 is constant, regardless of PAGE_SIZE
46	 * setting.
47	 */
48	if (pgoff & ((1 << (PAGE_SHIFT - 12)) - 1))
49		return -EINVAL;
50
51	pgoff >>= PAGE_SHIFT - 12;
52
53	return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff);
54}
55
56/* sys_cacheflush -- flush (part of) the processor cache.  */
57asmlinkage int sys_cacheflush(unsigned long addr, unsigned long len, int op)
58{
59	struct vm_area_struct *vma;
60
61	if ((op <= 0) || (op > (CACHEFLUSH_D_PURGE|CACHEFLUSH_I)))
62		return -EINVAL;
63
64	/*
65	 * Verify that the specified address region actually belongs
66	 * to this process.
67	 */
68	if (addr + len < addr)
69		return -EFAULT;
70
71	down_read(&current->mm->mmap_sem);
72	vma = find_vma (current->mm, addr);
73	if (vma == NULL || addr < vma->vm_start || addr + len > vma->vm_end) {
74		up_read(&current->mm->mmap_sem);
75		return -EFAULT;
76	}
77
78	switch (op & CACHEFLUSH_D_PURGE) {
79		case CACHEFLUSH_D_INVAL:
80			__flush_invalidate_region((void *)addr, len);
81			break;
82		case CACHEFLUSH_D_WB:
83			__flush_wback_region((void *)addr, len);
84			break;
85		case CACHEFLUSH_D_PURGE:
86			__flush_purge_region((void *)addr, len);
87			break;
88	}
89
90	if (op & CACHEFLUSH_I)
91		flush_icache_range(addr, addr+len);
92
93	up_read(&current->mm->mmap_sem);
94	return 0;
95}
96