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867e359b CM |
1 | /* |
2 | * Copyright 2010 Tilera Corporation. All Rights Reserved. | |
3 | * | |
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. | |
7 | * | |
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 | |
12 | * more details. | |
13 | * | |
14 | * This file contains various random system calls that | |
15 | * have a non-standard calling sequence on the Linux/TILE | |
16 | * platform. | |
17 | */ | |
18 | ||
19 | #include <linux/errno.h> | |
20 | #include <linux/sched.h> | |
21 | #include <linux/mm.h> | |
22 | #include <linux/smp.h> | |
867e359b CM |
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> | |
28 | #include <linux/fs.h> | |
0707ad30 | 29 | #include <linux/compat.h> |
867e359b CM |
30 | #include <linux/uaccess.h> |
31 | #include <linux/signal.h> | |
32 | #include <asm/syscalls.h> | |
867e359b CM |
33 | #include <asm/pgtable.h> |
34 | #include <asm/homecache.h> | |
cd6f32aa | 35 | #include <asm/cachectl.h> |
ca768667 | 36 | #include <asm/byteorder.h> |
867e359b CM |
37 | #include <arch/chip.h> |
38 | ||
cd6f32aa CM |
39 | SYSCALL_DEFINE3(cacheflush, unsigned long, addr, unsigned long, len, |
40 | unsigned long, flags) | |
867e359b | 41 | { |
bc1a298f | 42 | /* DCACHE is not particularly effective if not bound to one cpu. */ |
cd6f32aa | 43 | if (flags & DCACHE) |
bc1a298f CM |
44 | homecache_evict(cpumask_of(raw_smp_processor_id())); |
45 | ||
cd6f32aa CM |
46 | if (flags & ICACHE) |
47 | flush_remote(0, HV_FLUSH_EVICT_L1I, mm_cpumask(current->mm), | |
48 | 0, 0, 0, NULL, NULL, 0); | |
867e359b CM |
49 | return 0; |
50 | } | |
51 | ||
52 | /* | |
53 | * Syscalls that pass 64-bit values on 32-bit systems normally | |
54 | * pass them as (low,high) word packed into the immediately adjacent | |
55 | * registers. If the low word naturally falls on an even register, | |
56 | * our ABI makes it work correctly; if not, we adjust it here. | |
57 | * Handling it here means we don't have to fix uclibc AND glibc AND | |
58 | * any other standard libcs we want to support. | |
59 | */ | |
60 | ||
61 | #if !defined(__tilegx__) || defined(CONFIG_COMPAT) | |
62 | ||
ca768667 CM |
63 | #ifdef __BIG_ENDIAN |
64 | #define SYSCALL_PAIR(name) u32 name ## _hi, u32 name ## _lo | |
65 | #else | |
66 | #define SYSCALL_PAIR(name) u32 name ## _lo, u32 name ## _hi | |
67 | #endif | |
68 | ||
69 | ssize_t sys32_readahead(int fd, SYSCALL_PAIR(offset), u32 count) | |
867e359b CM |
70 | { |
71 | return sys_readahead(fd, ((loff_t)offset_hi << 32) | offset_lo, count); | |
72 | } | |
73 | ||
ca768667 CM |
74 | int sys32_fadvise64_64(int fd, SYSCALL_PAIR(offset), |
75 | SYSCALL_PAIR(len), int advice) | |
867e359b CM |
76 | { |
77 | return sys_fadvise64_64(fd, ((loff_t)offset_hi << 32) | offset_lo, | |
78 | ((loff_t)len_hi << 32) | len_lo, advice); | |
79 | } | |
80 | ||
81 | #endif /* 32-bit syscall wrappers */ | |
82 | ||
0707ad30 | 83 | /* Note: used by the compat code even in 64-bit Linux. */ |
867e359b CM |
84 | SYSCALL_DEFINE6(mmap2, unsigned long, addr, unsigned long, len, |
85 | unsigned long, prot, unsigned long, flags, | |
86 | unsigned long, fd, unsigned long, off_4k) | |
87 | { | |
88 | #define PAGE_ADJUST (PAGE_SHIFT - 12) | |
89 | if (off_4k & ((1 << PAGE_ADJUST) - 1)) | |
90 | return -EINVAL; | |
91 | return sys_mmap_pgoff(addr, len, prot, flags, fd, | |
92 | off_4k >> PAGE_ADJUST); | |
93 | } | |
94 | ||
0707ad30 | 95 | #ifdef __tilegx__ |
867e359b CM |
96 | SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len, |
97 | unsigned long, prot, unsigned long, flags, | |
139ef32b | 98 | unsigned long, fd, off_t, offset) |
867e359b CM |
99 | { |
100 | if (offset & ((1 << PAGE_SHIFT) - 1)) | |
101 | return -EINVAL; | |
102 | return sys_mmap_pgoff(addr, len, prot, flags, fd, | |
103 | offset >> PAGE_SHIFT); | |
104 | } | |
0707ad30 | 105 | #endif |
867e359b CM |
106 | |
107 | ||
108 | /* Provide the actual syscall number to call mapping. */ | |
109 | #undef __SYSCALL | |
110 | #define __SYSCALL(nr, call) [nr] = (call), | |
111 | ||
112 | #ifndef __tilegx__ | |
113 | /* See comments at the top of the file. */ | |
867e359b CM |
114 | #define sys_fadvise64_64 sys32_fadvise64_64 |
115 | #define sys_readahead sys32_readahead | |
867e359b CM |
116 | #endif |
117 | ||
6b14e419 CM |
118 | /* Call the assembly trampolines where necessary. */ |
119 | #undef sys_rt_sigreturn | |
d929b6ae CM |
120 | #define sys_rt_sigreturn _sys_rt_sigreturn |
121 | #define sys_clone _sys_clone | |
d929b6ae | 122 | |
0707ad30 CM |
123 | /* |
124 | * Note that we can't include <linux/unistd.h> here since the header | |
125 | * guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well. | |
126 | */ | |
867e359b CM |
127 | void *sys_call_table[__NR_syscalls] = { |
128 | [0 ... __NR_syscalls-1] = sys_ni_syscall, | |
129 | #include <asm/unistd.h> | |
130 | }; |