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
old_mmap(unsigned long addr,unsigned long len,unsigned long prot,unsigned long flags,int fd,unsigned long off)31 asmlinkage 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
sys_mmap2(unsigned long addr,unsigned long len,unsigned long prot,unsigned long flags,unsigned long fd,unsigned long pgoff)40 asmlinkage 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. */
sys_cacheflush(unsigned long addr,unsigned long len,int op)57 asmlinkage 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(¤t->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(¤t->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(¤t->mm->mmap_sem);
94 return 0;
95 }
96