1 files changed, 123 insertions, 0 deletions

diff --git a/arch/c6x/include/asm/syscall.h b/arch/c6x/include/asm/syscall.h
new file mode 100644
index 000000000000..ae2be315ee9c
--- /dev/null
+++ b/arch/c6x/include/asm/syscall.h
@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2011 Texas Instruments Incorporated
+ * Author: Mark Salter <msalter@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef __ASM_C6X_SYSCALL_H
+#define __ASM_C6X_SYSCALL_H
+
+#include <linux/err.h>
+#include <linux/sched.h>
+
+static inline int syscall_get_nr(struct task_struct *task,
+                                 struct pt_regs *regs)
+{
+        return regs->b0;
+}
+
+static inline void syscall_rollback(struct task_struct *task,
+                                    struct pt_regs *regs)
+{
+        /* do nothing */
+}
+
+static inline long syscall_get_error(struct task_struct *task,
+                                     struct pt_regs *regs)
+{
+        return IS_ERR_VALUE(regs->a4) ? regs->a4 : 0;
+}
+
+static inline long syscall_get_return_value(struct task_struct *task,
+                                            struct pt_regs *regs)
+{
+        return regs->a4;
+}
+
+static inline void syscall_set_return_value(struct task_struct *task,
+                                            struct pt_regs *regs,
+                                            int error, long val)
+{
+        regs->a4 = error ?: val;
+}
+
+static inline void syscall_get_arguments(struct task_struct *task,
+                                         struct pt_regs *regs, unsigned int i,
+                                         unsigned int n, unsigned long *args)
+{
+        switch (i) {
+        case 0:
+                if (!n--)
+                        break;
+                *args++ = regs->a4;
+        case 1:
+                if (!n--)
+                        break;
+                *args++ = regs->b4;
+        case 2:
+                if (!n--)
+                        break;
+                *args++ = regs->a6;
+        case 3:
+                if (!n--)
+                        break;
+                *args++ = regs->b6;
+        case 4:
+                if (!n--)
+                        break;
+                *args++ = regs->a8;
+        case 5:
+                if (!n--)
+                        break;
+                *args++ = regs->b8;
+        case 6:
+                if (!n--)
+                        break;
+        default:
+                BUG();
+        }
+}
+
+static inline void syscall_set_arguments(struct task_struct *task,
+                                         struct pt_regs *regs,
+                                         unsigned int i, unsigned int n,
+                                         const unsigned long *args)
+{
+        switch (i) {
+        case 0:
+                if (!n--)
+                        break;
+                regs->a4 = *args++;
+        case 1:
+                if (!n--)
+                        break;
+                regs->b4 = *args++;
+        case 2:
+                if (!n--)
+                        break;
+                regs->a6 = *args++;
+        case 3:
+                if (!n--)
+                        break;
+                regs->b6 = *args++;
+        case 4:
+                if (!n--)
+                        break;
+                regs->a8 = *args++;
+        case 5:
+                if (!n--)
+                        break;
+                regs->a9 = *args++;
+        case 6:
+                if (!n)
+                        break;
+        default:
+                BUG();
+        }
+}
+
+#endif /* __ASM_C6X_SYSCALLS_H */