1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* |
3 | * linux/arch/sh/kernel/sys_sh.c |
4 | * |
5 | * This file contains various random system calls that |
6 | * have a non-standard calling sequence on the Linux/SuperH |
7 | * platform. |
8 | * |
9 | * Taken from i386 version. |
10 | */ |
11 | #include <linux/errno.h> |
12 | #include <linux/sched.h> |
13 | #include <linux/mm.h> |
14 | #include <linux/smp.h> |
15 | #include <linux/sem.h> |
16 | #include <linux/msg.h> |
17 | #include <linux/shm.h> |
18 | #include <linux/stat.h> |
19 | #include <linux/syscalls.h> |
20 | #include <linux/mman.h> |
21 | #include <linux/file.h> |
22 | #include <linux/utsname.h> |
23 | #include <linux/module.h> |
24 | #include <linux/fs.h> |
25 | #include <linux/ipc.h> |
26 | #include <asm/syscalls.h> |
27 | #include <linux/uaccess.h> |
28 | #include <asm/unistd.h> |
29 | #include <asm/cacheflush.h> |
30 | #include <asm/cachectl.h> |
31 | |
32 | asmlinkage int old_mmap(unsigned long addr, unsigned long len, |
33 | unsigned long prot, unsigned long flags, |
34 | int fd, unsigned long off) |
35 | { |
36 | if (off & ~PAGE_MASK) |
37 | return -EINVAL; |
38 | return ksys_mmap_pgoff(addr, len, prot, flags, fd, pgoff: off>>PAGE_SHIFT); |
39 | } |
40 | |
41 | asmlinkage long sys_mmap2(unsigned long addr, unsigned long len, |
42 | unsigned long prot, unsigned long flags, |
43 | unsigned long fd, unsigned long pgoff) |
44 | { |
45 | /* |
46 | * The shift for mmap2 is constant, regardless of PAGE_SIZE |
47 | * setting. |
48 | */ |
49 | if (pgoff & ((1 << (PAGE_SHIFT - 12)) - 1)) |
50 | return -EINVAL; |
51 | |
52 | pgoff >>= PAGE_SHIFT - 12; |
53 | |
54 | return ksys_mmap_pgoff(addr, len, prot, flags, fd, pgoff); |
55 | } |
56 | |
57 | /* sys_cacheflush -- flush (part of) the processor cache. */ |
58 | asmlinkage int sys_cacheflush(unsigned long addr, unsigned long len, int op) |
59 | { |
60 | struct vm_area_struct *vma; |
61 | |
62 | if ((op <= 0) || (op > (CACHEFLUSH_D_PURGE|CACHEFLUSH_I))) |
63 | return -EINVAL; |
64 | |
65 | /* |
66 | * Verify that the specified address region actually belongs |
67 | * to this process. |
68 | */ |
69 | if (addr + len < addr) |
70 | return -EFAULT; |
71 | |
72 | mmap_read_lock(current->mm); |
73 | vma = find_vma (current->mm, addr); |
74 | if (vma == NULL || addr < vma->vm_start || addr + len > vma->vm_end) { |
75 | mmap_read_unlock(current->mm); |
76 | return -EFAULT; |
77 | } |
78 | |
79 | switch (op & CACHEFLUSH_D_PURGE) { |
80 | case CACHEFLUSH_D_INVAL: |
81 | __flush_invalidate_region((void *)addr, len); |
82 | break; |
83 | case CACHEFLUSH_D_WB: |
84 | __flush_wback_region((void *)addr, len); |
85 | break; |
86 | case CACHEFLUSH_D_PURGE: |
87 | __flush_purge_region((void *)addr, len); |
88 | break; |
89 | } |
90 | |
91 | if (op & CACHEFLUSH_I) |
92 | flush_icache_range(start: addr, end: addr+len); |
93 | |
94 | mmap_read_unlock(current->mm); |
95 | return 0; |
96 | } |
97 | |