x86_64: prepare shared kernel/i387.c

[safe/jmp/linux-2.6] / arch / x86_64 / kernel / i387.c

diff --git a/arch/x86_64/kernel/i387.c b/arch/x86_64/kernel/i387.c
deleted file mode 100644 (file)
index 1d58c13..0000000
--- a/arch/x86_64/kernel/i387.c
+++ /dev/null
@@ -1,151 +0,0 @@
-/*
- *  linux/arch/x86_64/kernel/i387.c
- *
- *  Copyright (C) 1994 Linus Torvalds
- *  Copyright (C) 2002 Andi Kleen, SuSE Labs
- *
- *  Pentium III FXSR, SSE support
- *  General FPU state handling cleanups
- *     Gareth Hughes <gareth@valinux.com>, May 2000
- * 
- *  x86-64 rework 2002 Andi Kleen. 
- *  Does direct fxsave in and out of user space now for signal handlers.
- *  All the FSAVE<->FXSAVE conversion code has been moved to the 32bit emulation,
- *  the 64bit user space sees a FXSAVE frame directly. 
- */
-
-#include <linux/sched.h>
-#include <linux/init.h>
-#include <asm/processor.h>
-#include <asm/i387.h>
-#include <asm/sigcontext.h>
-#include <asm/user.h>
-#include <asm/ptrace.h>
-#include <asm/uaccess.h>
-
-unsigned int mxcsr_feature_mask __read_mostly = 0xffffffff;
-
-void mxcsr_feature_mask_init(void)
-{
-       unsigned int mask;
-       clts();
-       memset(&current->thread.i387.fxsave, 0, sizeof(struct i387_fxsave_struct));
-       asm volatile("fxsave %0" : : "m" (current->thread.i387.fxsave));
-       mask = current->thread.i387.fxsave.mxcsr_mask;
-       if (mask == 0) mask = 0x0000ffbf;
-       mxcsr_feature_mask &= mask;
-       stts();
-}
-
-/*
- * Called at bootup to set up the initial FPU state that is later cloned
- * into all processes.
- */
-void __cpuinit fpu_init(void)
-{
-       unsigned long oldcr0 = read_cr0();
-       extern void __bad_fxsave_alignment(void);
-               
-       if (offsetof(struct task_struct, thread.i387.fxsave) & 15)
-               __bad_fxsave_alignment();
-       set_in_cr4(X86_CR4_OSFXSR);
-       set_in_cr4(X86_CR4_OSXMMEXCPT);
-
-       write_cr0(oldcr0 & ~((1UL<<3)|(1UL<<2))); /* clear TS and EM */
-
-       mxcsr_feature_mask_init();
-       /* clean state in init */
-       current_thread_info()->status = 0;
-       clear_used_math();
-}
-
-void init_fpu(struct task_struct *child)
-{
-       if (tsk_used_math(child)) {
-               if (child == current)
-                       unlazy_fpu(child);
-               return;
-       }       
-       memset(&child->thread.i387.fxsave, 0, sizeof(struct i387_fxsave_struct));
-       child->thread.i387.fxsave.cwd = 0x37f;
-       child->thread.i387.fxsave.mxcsr = 0x1f80;
-       /* only the device not available exception or ptrace can call init_fpu */
-       set_stopped_child_used_math(child);
-}
-
-/*
- * Signal frame handlers.
- */
-
-int save_i387(struct _fpstate __user *buf)
-{
-       struct task_struct *tsk = current;
-       int err = 0;
-
-       BUILD_BUG_ON(sizeof(struct user_i387_struct) !=
-                       sizeof(tsk->thread.i387.fxsave));
-
-       if ((unsigned long)buf % 16) 
-               printk("save_i387: bad fpstate %p\n",buf); 
-
-       if (!used_math())
-               return 0;
-       clear_used_math(); /* trigger finit */
-       if (task_thread_info(tsk)->status & TS_USEDFPU) {
-               err = save_i387_checking((struct i387_fxsave_struct __user *)buf);
-               if (err) return err;
-               stts();
-               } else {
-               if (__copy_to_user(buf, &tsk->thread.i387.fxsave, 
-                                  sizeof(struct i387_fxsave_struct)))
-                       return -1;
-       } 
-               return 1;
-}
-
-/*
- * ptrace request handlers.
- */
-
-int get_fpregs(struct user_i387_struct __user *buf, struct task_struct *tsk)
-{
-       init_fpu(tsk);
-       return __copy_to_user(buf, &tsk->thread.i387.fxsave,
-                              sizeof(struct user_i387_struct)) ? -EFAULT : 0;
-}
-
-int set_fpregs(struct task_struct *tsk, struct user_i387_struct __user *buf)
-{
-       if (__copy_from_user(&tsk->thread.i387.fxsave, buf, 
-                            sizeof(struct user_i387_struct)))
-               return -EFAULT;
-               return 0;
-}
-
-/*
- * FPU state for core dumps.
- */
-
-int dump_fpu( struct pt_regs *regs, struct user_i387_struct *fpu )
-{
-       struct task_struct *tsk = current;
-
-       if (!used_math())
-               return 0;
-
-       unlazy_fpu(tsk);
-       memcpy(fpu, &tsk->thread.i387.fxsave, sizeof(struct user_i387_struct)); 
-       return 1; 
-}
-
-int dump_task_fpu(struct task_struct *tsk, struct user_i387_struct *fpu)
-{
-       int fpvalid = !!tsk_used_math(tsk);
-
-       if (fpvalid) {
-               if (tsk == current)
-                       unlazy_fpu(tsk);
-               memcpy(fpu, &tsk->thread.i387.fxsave, sizeof(struct user_i387_struct));         
-}
-       return fpvalid;
-}