Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 346 insertions, 0 deletions

diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
new file mode 100644
index 00000000..b08220c8
--- /dev/null
+++ b/arch/mips/kernel/syscall.c
@@ -0,0 +1,346 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1995, 1996, 1997, 2000, 2001, 05 by Ralf Baechle
+ * Copyright (C) 1999, 2000 Silicon Graphics, Inc.
+ * Copyright (C) 2001 MIPS Technologies, Inc.
+ */
+#include <linux/capability.h>
+#include <linux/errno.h>
+#include <linux/linkage.h>
+#include <linux/fs.h>
+#include <linux/smp.h>
+#include <linux/ptrace.h>
+#include <linux/string.h>
+#include <linux/syscalls.h>
+#include <linux/file.h>
+#include <linux/utsname.h>
+#include <linux/unistd.h>
+#include <linux/sem.h>
+#include <linux/msg.h>
+#include <linux/shm.h>
+#include <linux/compiler.h>
+#include <linux/ipc.h>
+#include <linux/uaccess.h>
+#include <linux/slab.h>
+#include <linux/elf.h>
+
+#include <asm/asm.h>
+#include <asm/branch.h>
+#include <asm/cachectl.h>
+#include <asm/cacheflush.h>
+#include <asm/asm-offsets.h>
+#include <asm/signal.h>
+#include <asm/sim.h>
+#include <asm/shmparam.h>
+#include <asm/sysmips.h>
+#include <asm/uaccess.h>
+#include <asm/switch_to.h>
+
+/*
+ * For historic reasons the pipe(2) syscall on MIPS has an unusual calling
+ * convention.  It returns results in registers $v0 / $v1 which means there
+ * is no need for it to do verify the validity of a userspace pointer
+ * argument.  Historically that used to be expensive in Linux.  These days
+ * the performance advantage is negligible.
+ */
+asmlinkage int sysm_pipe(nabi_no_regargs volatile struct pt_regs regs)
+{
+	int fd[2];
+	int error, res;
+
+	error = do_pipe_flags(fd, 0);
+	if (error) {
+		res = error;
+		goto out;
+	}
+	regs.regs[3] = fd[1];
+	res = fd[0];
+out:
+	return res;
+}
+
+SYSCALL_DEFINE6(mips_mmap, unsigned long, addr, unsigned long, len,
+	unsigned long, prot, unsigned long, flags, unsigned long,
+	fd, off_t, offset)
+{
+	unsigned long result;
+
+	result = -EINVAL;
+	if (offset & ~PAGE_MASK)
+		goto out;
+
+	result = sys_mmap_pgoff(addr, len, prot, flags, fd, offset >> PAGE_SHIFT);
+
+out:
+	return result;
+}
+
+SYSCALL_DEFINE6(mips_mmap2, unsigned long, addr, unsigned long, len,
+	unsigned long, prot, unsigned long, flags, unsigned long, fd,
+	unsigned long, pgoff)
+{
+	if (pgoff & (~PAGE_MASK >> 12))
+		return -EINVAL;
+
+	return sys_mmap_pgoff(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT-12));
+}
+
+save_static_function(sys_fork);
+static int __used noinline
+_sys_fork(nabi_no_regargs struct pt_regs regs)
+{
+	return do_fork(SIGCHLD, regs.regs[29], &regs, 0, NULL, NULL);
+}
+
+save_static_function(sys_clone);
+static int __used noinline
+_sys_clone(nabi_no_regargs struct pt_regs regs)
+{
+	unsigned long clone_flags;
+	unsigned long newsp;
+	int __user *parent_tidptr, *child_tidptr;
+
+	clone_flags = regs.regs[4];
+	newsp = regs.regs[5];
+	if (!newsp)
+		newsp = regs.regs[29];
+	parent_tidptr = (int __user *) regs.regs[6];
+#ifdef CONFIG_32BIT
+	/* We need to fetch the fifth argument off the stack.  */
+	child_tidptr = NULL;
+	if (clone_flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID)) {
+		int __user *__user *usp = (int __user *__user *) regs.regs[29];
+		if (regs.regs[2] == __NR_syscall) {
+			if (get_user (child_tidptr, &usp[5]))
+				return -EFAULT;
+		}
+		else if (get_user (child_tidptr, &usp[4]))
+			return -EFAULT;
+	}
+#else
+	child_tidptr = (int __user *) regs.regs[8];
+#endif
+	return do_fork(clone_flags, newsp, &regs, 0,
+	               parent_tidptr, child_tidptr);
+}
+
+/*
+ * sys_execve() executes a new program.
+ */
+asmlinkage int sys_execve(nabi_no_regargs struct pt_regs regs)
+{
+	int error;
+	char * filename;
+
+	filename = getname((const char __user *) (long)regs.regs[4]);
+	error = PTR_ERR(filename);
+	if (IS_ERR(filename))
+		goto out;
+	error = do_execve(filename,
+			  (const char __user *const __user *) (long)regs.regs[5],
+	                  (const char __user *const __user *) (long)regs.regs[6],
+			  &regs);
+	putname(filename);
+
+out:
+	return error;
+}
+
+SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
+{
+	struct thread_info *ti = task_thread_info(current);
+
+	ti->tp_value = addr;
+	if (cpu_has_userlocal)
+		write_c0_userlocal(addr);
+
+	return 0;
+}
+
+static inline int mips_atomic_set(struct pt_regs *regs,
+	unsigned long addr, unsigned long new)
+{
+	unsigned long old, tmp;
+	unsigned int err;
+
+	if (unlikely(addr & 3))
+		return -EINVAL;
+
+	if (unlikely(!access_ok(VERIFY_WRITE, addr, 4)))
+		return -EINVAL;
+
+	if (cpu_has_llsc && R10000_LLSC_WAR) {
+		__asm__ __volatile__ (
+		"	.set	mips3					\n"
+		"	li	%[err], 0				\n"
+		"1:	ll	%[old], (%[addr])			\n"
+		"	move	%[tmp], %[new]				\n"
+		"2:	sc	%[tmp], (%[addr])			\n"
+		"	beqzl	%[tmp], 1b				\n"
+		"3:							\n"
+		"	.section .fixup,\"ax\"				\n"
+		"4:	li	%[err], %[efault]			\n"
+		"	j	3b					\n"
+		"	.previous					\n"
+		"	.section __ex_table,\"a\"			\n"
+		"	"STR(PTR)"	1b, 4b				\n"
+		"	"STR(PTR)"	2b, 4b				\n"
+		"	.previous					\n"
+		"	.set	mips0					\n"
+		: [old] "=&r" (old),
+		  [err] "=&r" (err),
+		  [tmp] "=&r" (tmp)
+		: [addr] "r" (addr),
+		  [new] "r" (new),
+		  [efault] "i" (-EFAULT)
+		: "memory");
+	} else if (cpu_has_llsc) {
+		__asm__ __volatile__ (
+		"	.set	mips3					\n"
+		"	li	%[err], 0				\n"
+		"1:	ll	%[old], (%[addr])			\n"
+		"	move	%[tmp], %[new]				\n"
+		"2:	sc	%[tmp], (%[addr])			\n"
+		"	bnez	%[tmp], 4f				\n"
+		"3:							\n"
+		"	.subsection 2					\n"
+		"4:	b	1b					\n"
+		"	.previous					\n"
+		"							\n"
+		"	.section .fixup,\"ax\"				\n"
+		"5:	li	%[err], %[efault]			\n"
+		"	j	3b					\n"
+		"	.previous					\n"
+		"	.section __ex_table,\"a\"			\n"
+		"	"STR(PTR)"	1b, 5b				\n"
+		"	"STR(PTR)"	2b, 5b				\n"
+		"	.previous					\n"
+		"	.set	mips0					\n"
+		: [old] "=&r" (old),
+		  [err] "=&r" (err),
+		  [tmp] "=&r" (tmp)
+		: [addr] "r" (addr),
+		  [new] "r" (new),
+		  [efault] "i" (-EFAULT)
+		: "memory");
+	} else {
+		do {
+			preempt_disable();
+			ll_bit = 1;
+			ll_task = current;
+			preempt_enable();
+
+			err = __get_user(old, (unsigned int *) addr);
+			err |= __put_user(new, (unsigned int *) addr);
+			if (err)
+				break;
+			rmb();
+		} while (!ll_bit);
+	}
+
+	if (unlikely(err))
+		return err;
+
+	regs->regs[2] = old;
+	regs->regs[7] = 0;	/* No error */
+
+	/*
+	 * Don't let your children do this ...
+	 */
+	__asm__ __volatile__(
+	"	move	$29, %0						\n"
+	"	j	syscall_exit					\n"
+	: /* no outputs */
+	: "r" (regs));
+
+	/* unreached.  Honestly.  */
+	while (1);
+}
+
+save_static_function(sys_sysmips);
+static int __used noinline
+_sys_sysmips(nabi_no_regargs struct pt_regs regs)
+{
+	long cmd, arg1, arg2;
+
+	cmd = regs.regs[4];
+	arg1 = regs.regs[5];
+	arg2 = regs.regs[6];
+
+	switch (cmd) {
+	case MIPS_ATOMIC_SET:
+		return mips_atomic_set(&regs, arg1, arg2);
+
+	case MIPS_FIXADE:
+		if (arg1 & ~3)
+			return -EINVAL;
+
+		if (arg1 & 1)
+			set_thread_flag(TIF_FIXADE);
+		else
+			clear_thread_flag(TIF_FIXADE);
+		if (arg1 & 2)
+			set_thread_flag(TIF_LOGADE);
+		else
+			clear_thread_flag(TIF_LOGADE);
+
+		return 0;
+
+	case FLUSH_CACHE:
+		__flush_cache_all();
+		return 0;
+	}
+
+	return -EINVAL;
+}
+
+/*
+ * No implemented yet ...
+ */
+SYSCALL_DEFINE3(cachectl, char *, addr, int, nbytes, int, op)
+{
+	return -ENOSYS;
+}
+
+/*
+ * If we ever come here the user sp is bad.  Zap the process right away.
+ * Due to the bad stack signaling wouldn't work.
+ */
+asmlinkage void bad_stack(void)
+{
+	do_exit(SIGSEGV);
+}
+
+/*
+ * Do a system call from kernel instead of calling sys_execve so we
+ * end up with proper pt_regs.
+ */
+int kernel_execve(const char *filename,
+		  const char *const argv[],
+		  const char *const envp[])
+{
+	register unsigned long __a0 asm("$4") = (unsigned long) filename;
+	register unsigned long __a1 asm("$5") = (unsigned long) argv;
+	register unsigned long __a2 asm("$6") = (unsigned long) envp;
+	register unsigned long __a3 asm("$7");
+	unsigned long __v0;
+
+	__asm__ volatile ("					\n"
+	"	.set	noreorder				\n"
+	"	li	$2, %5		# __NR_execve		\n"
+	"	syscall						\n"
+	"	move	%0, $2					\n"
+	"	.set	reorder					\n"
+	: "=&r" (__v0), "=r" (__a3)
+	: "r" (__a0), "r" (__a1), "r" (__a2), "i" (__NR_execve)
+	: "$2", "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", "$24",
+	  "memory");
+
+	if (__a3 == 0)
+		return __v0;
+
+	return -__v0;
+}