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10#include <linux/capability.h>
11#include <linux/errno.h>
12#include <linux/linkage.h>
13#include <linux/fs.h>
14#include <linux/smp.h>
15#include <linux/ptrace.h>
16#include <linux/string.h>
17#include <linux/syscalls.h>
18#include <linux/file.h>
19#include <linux/utsname.h>
20#include <linux/unistd.h>
21#include <linux/sem.h>
22#include <linux/msg.h>
23#include <linux/shm.h>
24#include <linux/compiler.h>
25#include <linux/ipc.h>
26#include <linux/uaccess.h>
27#include <linux/slab.h>
28#include <linux/elf.h>
29
30#include <asm/asm.h>
31#include <asm/branch.h>
32#include <asm/cachectl.h>
33#include <asm/cacheflush.h>
34#include <asm/asm-offsets.h>
35#include <asm/signal.h>
36#include <asm/sim.h>
37#include <asm/shmparam.h>
38#include <asm/sysmips.h>
39#include <asm/uaccess.h>
40#include <asm/switch_to.h>
41
42
43
44
45
46
47
48
49asmlinkage int sysm_pipe(void)
50{
51 int fd[2];
52 int error = do_pipe_flags(fd, 0);
53 if (error)
54 return error;
55 current_pt_regs()->regs[3] = fd[1];
56 return fd[0];
57}
58
59SYSCALL_DEFINE6(mips_mmap, unsigned long, addr, unsigned long, len,
60 unsigned long, prot, unsigned long, flags, unsigned long,
61 fd, off_t, offset)
62{
63 unsigned long result;
64
65 result = -EINVAL;
66 if (offset & ~PAGE_MASK)
67 goto out;
68
69 result = sys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
70
71out:
72 return result;
73}
74
75SYSCALL_DEFINE6(mips_mmap2, unsigned long, addr, unsigned long, len,
76 unsigned long, prot, unsigned long, flags, unsigned long, fd,
77 unsigned long, pgoff)
78{
79 if (pgoff & (~PAGE_MASK >> 12))
80 return -EINVAL;
81
82 return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT-12));
83}
84
85save_static_function(sys_fork);
86save_static_function(sys_clone);
87
88SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
89{
90 struct thread_info *ti = task_thread_info(current);
91
92 ti->tp_value = addr;
93 if (cpu_has_userlocal)
94 write_c0_userlocal(addr);
95
96 return 0;
97}
98
99static inline int mips_atomic_set(unsigned long addr, unsigned long new)
100{
101 unsigned long old, tmp;
102 struct pt_regs *regs;
103 unsigned int err;
104
105 if (unlikely(addr & 3))
106 return -EINVAL;
107
108 if (unlikely(!access_ok(VERIFY_WRITE, addr, 4)))
109 return -EINVAL;
110
111 if (cpu_has_llsc && R10000_LLSC_WAR) {
112 __asm__ __volatile__ (
113 " .set arch=r4000 \n"
114 " li %[err], 0 \n"
115 "1: ll %[old], (%[addr]) \n"
116 " move %[tmp], %[new] \n"
117 "2: sc %[tmp], (%[addr]) \n"
118 " beqzl %[tmp], 1b \n"
119 "3: \n"
120 " .insn \n"
121 " .section .fixup,\"ax\" \n"
122 "4: li %[err], %[efault] \n"
123 " j 3b \n"
124 " .previous \n"
125 " .section __ex_table,\"a\" \n"
126 " "STR(PTR)" 1b, 4b \n"
127 " "STR(PTR)" 2b, 4b \n"
128 " .previous \n"
129 " .set mips0 \n"
130 : [old] "=&r" (old),
131 [err] "=&r" (err),
132 [tmp] "=&r" (tmp)
133 : [addr] "r" (addr),
134 [new] "r" (new),
135 [efault] "i" (-EFAULT)
136 : "memory");
137 } else if (cpu_has_llsc) {
138 __asm__ __volatile__ (
139 " .set "MIPS_ISA_ARCH_LEVEL" \n"
140 " li %[err], 0 \n"
141 "1: ll %[old], (%[addr]) \n"
142 " move %[tmp], %[new] \n"
143 "2: sc %[tmp], (%[addr]) \n"
144 " bnez %[tmp], 4f \n"
145 "3: \n"
146 " .insn \n"
147 " .subsection 2 \n"
148 "4: b 1b \n"
149 " .previous \n"
150 " \n"
151 " .section .fixup,\"ax\" \n"
152 "5: li %[err], %[efault] \n"
153 " j 3b \n"
154 " .previous \n"
155 " .section __ex_table,\"a\" \n"
156 " "STR(PTR)" 1b, 5b \n"
157 " "STR(PTR)" 2b, 5b \n"
158 " .previous \n"
159 " .set mips0 \n"
160 : [old] "=&r" (old),
161 [err] "=&r" (err),
162 [tmp] "=&r" (tmp)
163 : [addr] "r" (addr),
164 [new] "r" (new),
165 [efault] "i" (-EFAULT)
166 : "memory");
167 } else {
168 do {
169 preempt_disable();
170 ll_bit = 1;
171 ll_task = current;
172 preempt_enable();
173
174 err = __get_user(old, (unsigned int *) addr);
175 err |= __put_user(new, (unsigned int *) addr);
176 if (err)
177 break;
178 rmb();
179 } while (!ll_bit);
180 }
181
182 if (unlikely(err))
183 return err;
184
185 regs = current_pt_regs();
186 regs->regs[2] = old;
187 regs->regs[7] = 0;
188
189
190
191
192 __asm__ __volatile__(
193 " move $29, %0 \n"
194 " j syscall_exit \n"
195 :
196 : "r" (regs));
197
198
199 unreachable();
200}
201
202SYSCALL_DEFINE3(sysmips, long, cmd, long, arg1, long, arg2)
203{
204 switch (cmd) {
205 case MIPS_ATOMIC_SET:
206 return mips_atomic_set(arg1, arg2);
207
208 case MIPS_FIXADE:
209 if (arg1 & ~3)
210 return -EINVAL;
211
212 if (arg1 & 1)
213 set_thread_flag(TIF_FIXADE);
214 else
215 clear_thread_flag(TIF_FIXADE);
216 if (arg1 & 2)
217 set_thread_flag(TIF_LOGADE);
218 else
219 clear_thread_flag(TIF_LOGADE);
220
221 return 0;
222
223 case FLUSH_CACHE:
224 __flush_cache_all();
225 return 0;
226 }
227
228 return -EINVAL;
229}
230
231
232
233
234SYSCALL_DEFINE3(cachectl, char *, addr, int, nbytes, int, op)
235{
236 return -ENOSYS;
237}
238
239
240
241
242
243asmlinkage void bad_stack(void)
244{
245 do_exit(SIGSEGV);
246}
247
