2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 1995, 1996, 1997, 2000, 2001, 05 by Ralf Baechle
7 * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
8 * Copyright (C) 2001 MIPS Technologies, Inc.
10 #include <linux/capability.h>
11 #include <linux/errno.h>
12 #include <linux/linkage.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>
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>
37 #include <asm/shmparam.h>
38 #include <asm/sysmips.h>
39 #include <asm/switch_to.h>
42 * For historic reasons the pipe(2) syscall on MIPS has an unusual calling
43 * convention. It returns results in registers $v0 / $v1 which means there
44 * is no need for it to do verify the validity of a userspace pointer
45 * argument. Historically that used to be expensive in Linux. These days
46 * the performance advantage is negligible.
48 asmlinkage int sysm_pipe(void)
51 int error = do_pipe_flags(fd, 0);
54 current_pt_regs()->regs[3] = fd[1];
58 SYSCALL_DEFINE6(mips_mmap, unsigned long, addr, unsigned long, len,
59 unsigned long, prot, unsigned long, flags, unsigned long,
62 if (offset & ~PAGE_MASK)
64 return sys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
67 SYSCALL_DEFINE6(mips_mmap2, unsigned long, addr, unsigned long, len,
68 unsigned long, prot, unsigned long, flags, unsigned long, fd,
71 if (pgoff & (~PAGE_MASK >> 12))
74 return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT-12));
77 save_static_function(sys_fork);
78 save_static_function(sys_clone);
80 SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
82 struct thread_info *ti = task_thread_info(current);
85 if (cpu_has_userlocal)
86 write_c0_userlocal(addr);
91 static inline int mips_atomic_set(unsigned long addr, unsigned long new)
93 unsigned long old, tmp;
97 if (unlikely(addr & 3))
100 if (unlikely(!access_ok(VERIFY_WRITE, addr, 4)))
103 if (cpu_has_llsc && R10000_LLSC_WAR) {
104 __asm__ __volatile__ (
105 " .set arch=r4000 \n"
107 "1: ll %[old], (%[addr]) \n"
108 " move %[tmp], %[new] \n"
109 "2: sc %[tmp], (%[addr]) \n"
110 " beqzl %[tmp], 1b \n"
113 " .section .fixup,\"ax\" \n"
114 "4: li %[err], %[efault] \n"
117 " .section __ex_table,\"a\" \n"
118 " "STR(PTR)" 1b, 4b \n"
119 " "STR(PTR)" 2b, 4b \n"
127 [efault] "i" (-EFAULT)
129 } else if (cpu_has_llsc) {
130 __asm__ __volatile__ (
131 " .set "MIPS_ISA_ARCH_LEVEL" \n"
133 "1: ll %[old], (%[addr]) \n"
134 " move %[tmp], %[new] \n"
135 "2: sc %[tmp], (%[addr]) \n"
136 " bnez %[tmp], 4f \n"
143 " .section .fixup,\"ax\" \n"
144 "5: li %[err], %[efault] \n"
147 " .section __ex_table,\"a\" \n"
148 " "STR(PTR)" 1b, 5b \n"
149 " "STR(PTR)" 2b, 5b \n"
157 [efault] "i" (-EFAULT)
166 err = __get_user(old, (unsigned int *) addr);
167 err |= __put_user(new, (unsigned int *) addr);
177 regs = current_pt_regs();
179 regs->regs[7] = 0; /* No error */
182 * Don't let your children do this ...
184 __asm__ __volatile__(
190 /* unreached. Honestly. */
194 SYSCALL_DEFINE3(sysmips, long, cmd, long, arg1, long, arg2)
197 case MIPS_ATOMIC_SET:
198 return mips_atomic_set(arg1, arg2);
205 set_thread_flag(TIF_FIXADE);
207 clear_thread_flag(TIF_FIXADE);
209 set_thread_flag(TIF_LOGADE);
211 clear_thread_flag(TIF_LOGADE);
224 * No implemented yet ...
226 SYSCALL_DEFINE3(cachectl, char *, addr, int, nbytes, int, op)
232 * If we ever come here the user sp is bad. Zap the process right away.
233 * Due to the bad stack signaling wouldn't work.
235 asmlinkage void bad_stack(void)