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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#include <linux/sched/task_stack.h>
30
31#include <asm/asm.h>
32#include <asm/asm-eva.h>
33#include <asm/branch.h>
34#include <asm/cachectl.h>
35#include <asm/cacheflush.h>
36#include <asm/asm-offsets.h>
37#include <asm/signal.h>
38#include <asm/sim.h>
39#include <asm/shmparam.h>
40#include <asm/sysmips.h>
41#include <asm/switch_to.h>
42
43
44
45
46
47
48
49
50asmlinkage int sysm_pipe(void)
51{
52 int fd[2];
53 int error = do_pipe_flags(fd, 0);
54 if (error)
55 return error;
56 current_pt_regs()->regs[3] = fd[1];
57 return fd[0];
58}
59
60SYSCALL_DEFINE6(mips_mmap, unsigned long, addr, unsigned long, len,
61 unsigned long, prot, unsigned long, flags, unsigned long,
62 fd, off_t, offset)
63{
64 if (offset & ~PAGE_MASK)
65 return -EINVAL;
66 return ksys_mmap_pgoff(addr, len, prot, flags, fd,
67 offset >> PAGE_SHIFT);
68}
69
70SYSCALL_DEFINE6(mips_mmap2, unsigned long, addr, unsigned long, len,
71 unsigned long, prot, unsigned long, flags, unsigned long, fd,
72 unsigned long, pgoff)
73{
74 if (pgoff & (~PAGE_MASK >> 12))
75 return -EINVAL;
76
77 return ksys_mmap_pgoff(addr, len, prot, flags, fd,
78 pgoff >> (PAGE_SHIFT - 12));
79}
80
81save_static_function(sys_fork);
82save_static_function(sys_clone);
83
84SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
85{
86 struct thread_info *ti = task_thread_info(current);
87
88 ti->tp_value = addr;
89 if (cpu_has_userlocal)
90 write_c0_userlocal(addr);
91
92 return 0;
93}
94
95static inline int mips_atomic_set(unsigned long addr, unsigned long new)
96{
97 unsigned long old, tmp;
98 struct pt_regs *regs;
99 unsigned int err;
100
101 if (unlikely(addr & 3))
102 return -EINVAL;
103
104 if (unlikely(!access_ok(VERIFY_WRITE, (const void __user *)addr, 4)))
105 return -EINVAL;
106
107 if (cpu_has_llsc && R10000_LLSC_WAR) {
108 __asm__ __volatile__ (
109 " .set arch=r4000 \n"
110 " li %[err], 0 \n"
111 "1: ll %[old], (%[addr]) \n"
112 " move %[tmp], %[new] \n"
113 "2: sc %[tmp], (%[addr]) \n"
114 " beqzl %[tmp], 1b \n"
115 "3: \n"
116 " .insn \n"
117 " .section .fixup,\"ax\" \n"
118 "4: li %[err], %[efault] \n"
119 " j 3b \n"
120 " .previous \n"
121 " .section __ex_table,\"a\" \n"
122 " "STR(PTR)" 1b, 4b \n"
123 " "STR(PTR)" 2b, 4b \n"
124 " .previous \n"
125 " .set mips0 \n"
126 : [old] "=&r" (old),
127 [err] "=&r" (err),
128 [tmp] "=&r" (tmp)
129 : [addr] "r" (addr),
130 [new] "r" (new),
131 [efault] "i" (-EFAULT)
132 : "memory");
133 } else if (cpu_has_llsc) {
134 __asm__ __volatile__ (
135 " .set "MIPS_ISA_ARCH_LEVEL" \n"
136 " li %[err], 0 \n"
137 "1: \n"
138 user_ll("%[old]", "(%[addr])")
139 " move %[tmp], %[new] \n"
140 "2: \n"
141 user_sc("%[tmp]", "(%[addr])")
142 " beqz %[tmp], 1b \n"
143 "3: \n"
144 " .insn \n"
145 " .section .fixup,\"ax\" \n"
146 "5: li %[err], %[efault] \n"
147 " j 3b \n"
148 " .previous \n"
149 " .section __ex_table,\"a\" \n"
150 " "STR(PTR)" 1b, 5b \n"
151 " "STR(PTR)" 2b, 5b \n"
152 " .previous \n"
153 " .set mips0 \n"
154 : [old] "=&r" (old),
155 [err] "=&r" (err),
156 [tmp] "=&r" (tmp)
157 : [addr] "r" (addr),
158 [new] "r" (new),
159 [efault] "i" (-EFAULT)
160 : "memory");
161 } else {
162 do {
163 preempt_disable();
164 ll_bit = 1;
165 ll_task = current;
166 preempt_enable();
167
168 err = __get_user(old, (unsigned int *) addr);
169 err |= __put_user(new, (unsigned int *) addr);
170 if (err)
171 break;
172 rmb();
173 } while (!ll_bit);
174 }
175
176 if (unlikely(err))
177 return err;
178
179 regs = current_pt_regs();
180 regs->regs[2] = old;
181 regs->regs[7] = 0;
182
183
184
185
186 __asm__ __volatile__(
187 " move $29, %0 \n"
188 " j syscall_exit \n"
189 :
190 : "r" (regs));
191
192
193 unreachable();
194}
195
196
197
198
199
200save_static_function(sys_sysmips);
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
