include/asm-s390/bug.h


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#ifndef _S390_BUG_H
#define _S390_BUG_H

#include <linux/kernel.h>

#ifdef CONFIG_BUG

static inline __attribute__((noreturn)) void __do_illegal_op(void)
{
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3)
	__builtin_trap();
#else
	asm volatile(".long 0");
#endif
}

#define BUG() do { \
	printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \
	__do_illegal_op(); \
} while (0)

#define HAVE_ARCH_BUG
#endif

#include <asm-generic/bug.h>

#endif
/*
 * 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),