2 * Copyright 2010 Tilera Corporation. All Rights Reserved.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation, version 2.
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
11 * NON INFRINGEMENT. See the GNU General Public License for
14 * This file contains various random system calls that
15 * have a non-standard calling sequence on the Linux/TILE
19 #include <linux/errno.h>
20 #include <linux/sched.h>
22 #include <linux/smp.h>
23 #include <linux/smp_lock.h>
24 #include <linux/syscalls.h>
25 #include <linux/mman.h>
26 #include <linux/file.h>
27 #include <linux/mempolicy.h>
28 #include <linux/binfmts.h>
30 #include <linux/compat.h>
31 #include <linux/uaccess.h>
32 #include <linux/signal.h>
33 #include <asm/syscalls.h>
34 #include <asm/pgtable.h>
35 #include <asm/homecache.h>
36 #include <arch/chip.h>
38 SYSCALL_DEFINE0(flush_cache
)
40 homecache_evict(cpumask_of(smp_processor_id()));
45 * Syscalls that pass 64-bit values on 32-bit systems normally
46 * pass them as (low,high) word packed into the immediately adjacent
47 * registers. If the low word naturally falls on an even register,
48 * our ABI makes it work correctly; if not, we adjust it here.
49 * Handling it here means we don't have to fix uclibc AND glibc AND
50 * any other standard libcs we want to support.
53 #if !defined(__tilegx__) || defined(CONFIG_COMPAT)
55 ssize_t
sys32_readahead(int fd
, u32 offset_lo
, u32 offset_hi
, u32 count
)
57 return sys_readahead(fd
, ((loff_t
)offset_hi
<< 32) | offset_lo
, count
);
60 long sys32_fadvise64(int fd
, u32 offset_lo
, u32 offset_hi
,
63 return sys_fadvise64_64(fd
, ((loff_t
)offset_hi
<< 32) | offset_lo
,
67 int sys32_fadvise64_64(int fd
, u32 offset_lo
, u32 offset_hi
,
68 u32 len_lo
, u32 len_hi
, int advice
)
70 return sys_fadvise64_64(fd
, ((loff_t
)offset_hi
<< 32) | offset_lo
,
71 ((loff_t
)len_hi
<< 32) | len_lo
, advice
);
74 #endif /* 32-bit syscall wrappers */
76 /* Note: used by the compat code even in 64-bit Linux. */
77 SYSCALL_DEFINE6(mmap2
, unsigned long, addr
, unsigned long, len
,
78 unsigned long, prot
, unsigned long, flags
,
79 unsigned long, fd
, unsigned long, off_4k
)
81 #define PAGE_ADJUST (PAGE_SHIFT - 12)
82 if (off_4k
& ((1 << PAGE_ADJUST
) - 1))
84 return sys_mmap_pgoff(addr
, len
, prot
, flags
, fd
,
85 off_4k
>> PAGE_ADJUST
);
89 SYSCALL_DEFINE6(mmap
, unsigned long, addr
, unsigned long, len
,
90 unsigned long, prot
, unsigned long, flags
,
91 unsigned long, fd
, off_t
, offset
)
93 if (offset
& ((1 << PAGE_SHIFT
) - 1))
95 return sys_mmap_pgoff(addr
, len
, prot
, flags
, fd
,
96 offset
>> PAGE_SHIFT
);
101 /* Provide the actual syscall number to call mapping. */
103 #define __SYSCALL(nr, call) [nr] = (call),
106 /* See comments at the top of the file. */
107 #define sys_fadvise64 sys32_fadvise64
108 #define sys_fadvise64_64 sys32_fadvise64_64
109 #define sys_readahead sys32_readahead
110 #define sys_sync_file_range sys_sync_file_range2
113 /* Call the trampolines to manage pt_regs where necessary. */
114 #define sys_execve _sys_execve
115 #define sys_sigaltstack _sys_sigaltstack
116 #define sys_rt_sigreturn _sys_rt_sigreturn
117 #define sys_clone _sys_clone
119 #define sys_cmpxchg_badaddr _sys_cmpxchg_badaddr
123 * Note that we can't include <linux/unistd.h> here since the header
124 * guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well.
126 void *sys_call_table
[__NR_syscalls
] = {
127 [0 ... __NR_syscalls
-1] = sys_ni_syscall
,
128 #include <asm/unistd.h>
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