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/syscalls.h>
24 #include <linux/mman.h>
25 #include <linux/file.h>
26 #include <linux/mempolicy.h>
27 #include <linux/binfmts.h>
29 #include <linux/compat.h>
30 #include <linux/uaccess.h>
31 #include <linux/signal.h>
32 #include <asm/syscalls.h>
33 #include <asm/pgtable.h>
34 #include <asm/homecache.h>
35 #include <asm/cachectl.h>
36 #include <arch/chip.h>
38 SYSCALL_DEFINE3(cacheflush, unsigned long, addr, unsigned long, len,
41 /* DCACHE is not particularly effective if not bound to one cpu. */
43 homecache_evict(cpumask_of(raw_smp_processor_id()));
46 flush_remote(0, HV_FLUSH_EVICT_L1I, mm_cpumask(current->mm),
47 0, 0, 0, NULL, NULL, 0);
52 * Syscalls that pass 64-bit values on 32-bit systems normally
53 * pass them as (low,high) word packed into the immediately adjacent
54 * registers. If the low word naturally falls on an even register,
55 * our ABI makes it work correctly; if not, we adjust it here.
56 * Handling it here means we don't have to fix uclibc AND glibc AND
57 * any other standard libcs we want to support.
60 #if !defined(__tilegx__) || defined(CONFIG_COMPAT)
62 ssize_t sys32_readahead(int fd, u32 offset_lo, u32 offset_hi, u32 count)
64 return sys_readahead(fd, ((loff_t)offset_hi << 32) | offset_lo, count);
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_64 sys32_fadvise64_64
108 #define sys_readahead sys32_readahead
111 /* Call the assembly trampolines where necessary. */
112 #undef sys_rt_sigreturn
113 #define sys_rt_sigreturn _sys_rt_sigreturn
114 #define sys_clone _sys_clone
117 * Note that we can't include <linux/unistd.h> here since the header
118 * guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well.
120 void *sys_call_table[__NR_syscalls] = {
121 [0 ... __NR_syscalls-1] = sys_ni_syscall,
122 #include <asm/unistd.h>