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Diffstat (limited to 'include/asm-i386/i387.h')
| -rw-r--r-- | include/asm-i386/i387.h | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/include/asm-i386/i387.h b/include/asm-i386/i387.h deleted file mode 100644 index cdd1e248e3b4..000000000000 --- a/include/asm-i386/i387.h +++ /dev/null @@ -1,151 +0,0 @@ -/* - * include/asm-i386/i387.h - * - * Copyright (C) 1994 Linus Torvalds - * - * Pentium III FXSR, SSE support - * General FPU state handling cleanups - * Gareth Hughes <gareth@valinux.com>, May 2000 - */ - -#ifndef __ASM_I386_I387_H -#define __ASM_I386_I387_H - -#include <linux/sched.h> -#include <linux/init.h> -#include <linux/kernel_stat.h> -#include <asm/processor.h> -#include <asm/sigcontext.h> -#include <asm/user.h> - -extern void mxcsr_feature_mask_init(void); -extern void init_fpu(struct task_struct *); - -/* - * FPU lazy state save handling... - */ - -/* - * The "nop" is needed to make the instructions the same - * length. - */ -#define restore_fpu(tsk) \ - alternative_input( \ - "nop ; frstor %1", \ - "fxrstor %1", \ - X86_FEATURE_FXSR, \ - "m" ((tsk)->thread.i387.fxsave)) - -extern void kernel_fpu_begin(void); -#define kernel_fpu_end() do { stts(); preempt_enable(); } while(0) - -/* We need a safe address that is cheap to find and that is already - in L1 during context switch. The best choices are unfortunately - different for UP and SMP */ -#ifdef CONFIG_SMP -#define safe_address (__per_cpu_offset[0]) -#else -#define safe_address (kstat_cpu(0).cpustat.user) -#endif - -/* - * These must be called with preempt disabled - */ -static inline void __save_init_fpu( struct task_struct *tsk ) -{ - /* Use more nops than strictly needed in case the compiler - varies code */ - alternative_input( - "fnsave %[fx] ;fwait;" GENERIC_NOP8 GENERIC_NOP4, - "fxsave %[fx]\n" - "bt $7,%[fsw] ; jnc 1f ; fnclex\n1:", - X86_FEATURE_FXSR, - [fx] "m" (tsk->thread.i387.fxsave), - [fsw] "m" (tsk->thread.i387.fxsave.swd) : "memory"); - /* AMD K7/K8 CPUs don't save/restore FDP/FIP/FOP unless an exception - is pending. Clear the x87 state here by setting it to fixed - values. safe_address is a random variable that should be in L1 */ - alternative_input( - GENERIC_NOP8 GENERIC_NOP2, - "emms\n\t" /* clear stack tags */ - "fildl %[addr]", /* set F?P to defined value */ - X86_FEATURE_FXSAVE_LEAK, - [addr] "m" (safe_address)); - task_thread_info(tsk)->status &= ~TS_USEDFPU; -} - -#define __unlazy_fpu( tsk ) do { \ - if (task_thread_info(tsk)->status & TS_USEDFPU) { \ - __save_init_fpu(tsk); \ - stts(); \ - } else \ - tsk->fpu_counter = 0; \ -} while (0) - -#define __clear_fpu( tsk ) \ -do { \ - if (task_thread_info(tsk)->status & TS_USEDFPU) { \ - asm volatile("fnclex ; fwait"); \ - task_thread_info(tsk)->status &= ~TS_USEDFPU; \ - stts(); \ - } \ -} while (0) - - -/* - * These disable preemption on their own and are safe - */ -static inline void save_init_fpu( struct task_struct *tsk ) -{ - preempt_disable(); - __save_init_fpu(tsk); - stts(); - preempt_enable(); -} - -#define unlazy_fpu( tsk ) do { \ - preempt_disable(); \ - __unlazy_fpu(tsk); \ - preempt_enable(); \ -} while (0) - -#define clear_fpu( tsk ) do { \ - preempt_disable(); \ - __clear_fpu( tsk ); \ - preempt_enable(); \ -} while (0) - -/* - * FPU state interaction... - */ -extern unsigned short get_fpu_cwd( struct task_struct *tsk ); -extern unsigned short get_fpu_swd( struct task_struct *tsk ); -extern unsigned short get_fpu_mxcsr( struct task_struct *tsk ); -extern asmlinkage void math_state_restore(void); - -/* - * Signal frame handlers... - */ -extern int save_i387( struct _fpstate __user *buf ); -extern int restore_i387( struct _fpstate __user *buf ); - -/* - * ptrace request handers... - */ -extern int get_fpregs( struct user_i387_struct __user *buf, - struct task_struct *tsk ); -extern int set_fpregs( struct task_struct *tsk, - struct user_i387_struct __user *buf ); - -extern int get_fpxregs( struct user_fxsr_struct __user *buf, - struct task_struct *tsk ); -extern int set_fpxregs( struct task_struct *tsk, - struct user_fxsr_struct __user *buf ); - -/* - * FPU state for core dumps... - */ -extern int dump_fpu( struct pt_regs *regs, - struct user_i387_struct *fpu ); - -#endif /* __ASM_I386_I387_H */ |