/* MN10300 FPU definitions * * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. * Written by David Howells (dhowells@redhat.com) * Derived from include/asm-i386/i387.h: Copyright (C) 1994 Linus Torvalds * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public Licence * as published by the Free Software Foundation; either version * 2 of the Licence, or (at your option) any later version. */ #ifndef _ASM_FPU_H #define _ASM_FPU_H #ifndef __ASSEMBLY__ #include <linux/sched.h> #include <asm/exceptions.h> #include <asm/sigcontext.h> #ifdef __KERNEL__ extern asmlinkage void fpu_disabled(void); #ifdef CONFIG_FPU #ifdef CONFIG_LAZY_SAVE_FPU /* the task that currently owns the FPU state */ extern struct task_struct *fpu_state_owner; #endif #if (THREAD_USING_FPU & ~0xff) #error THREAD_USING_FPU must be smaller than 0x100. #endif static inline void set_using_fpu(struct task_struct *tsk) { asm volatile( "bset %0,(0,%1)" : : "i"(THREAD_USING_FPU), "a"(&tsk->thread.fpu_flags) : "memory", "cc"); } static inline void clear_using_fpu(struct task_struct *tsk) { asm volatile( "bclr %0,(0,%1)" : : "i"(THREAD_USING_FPU), "a"(&tsk->thread.fpu_flags) : "memory", "cc"); } #define is_using_fpu(tsk) ((tsk)->thread.fpu_flags & THREAD_USING_FPU) extern asmlinkage void fpu_kill_state(struct task_struct *); extern asmlinkage void fpu_exception(struct pt_regs *, enum exception_code); extern asmlinkage void fpu_init_state(void); extern asmlinkage void fpu_save(struct fpu_state_struct *); extern int fpu_setup_sigcontext(struct fpucontext *buf); extern int fpu_restore_sigcontext(struct fpucontext *buf); static inline void unlazy_fpu(struct task_struct *tsk) { preempt_disable(); #ifndef CONFIG_LAZY_SAVE_FPU if (tsk->thread.fpu_flags & THREAD_HAS_FPU) { fpu_save(&tsk->thread.fpu_state); tsk->thread.fpu_flags &= ~THREAD_HAS_FPU; tsk->thread.uregs->epsw &= ~EPSW_FE; } #else if (fpu_state_owner == tsk) fpu_save(&tsk->thread.fpu_state); #endif preempt_enable(); } static inline void exit_fpu(struct task_struct *tsk) { #ifdef CONFIG_LAZY_SAVE_FPU preempt_disable(); if (fpu_state_owner == tsk) fpu_state_owner = NULL; preempt_enable(); #endif } static inline void flush_fpu(void) { struct task_struct *tsk = current; preempt_disable(); #ifndef CONFIG_LAZY_SAVE_FPU if (tsk->thread.fpu_flags & THREAD_HAS_FPU) { tsk->thread.fpu_flags &= ~THREAD_HAS_FPU; tsk->thread.uregs->epsw &= ~EPSW_FE; } #else if (fpu_state_owner == tsk) { fpu_state_owner = NULL; tsk->thread.uregs->epsw &= ~EPSW_FE; } #endif preempt_enable(); clear_using_fpu(tsk); } #else /* CONFIG_FPU */ extern asmlinkage void unexpected_fpu_exception(struct pt_regs *, enum exception_code); #define fpu_exception unexpected_fpu_exception struct task_struct; struct fpu_state_struct; static inline bool is_using_fpu(struct task_struct *tsk) { return false; } static inline void set_using_fpu(struct task_struct *tsk) {} static inline void clear_using_fpu(struct task_struct *tsk) {} static inline void fpu_init_state(void) {} static inline void fpu_save(struct fpu_state_struct *s) {} static inline void fpu_kill_state(struct task_struct *tsk) {} static inline void unlazy_fpu(struct task_struct *tsk) {} static inline void exit_fpu(struct task_struct *tsk) {} static inline void flush_fpu(void) {} static inline int fpu_setup_sigcontext(struct fpucontext *buf) { return 0; } static inline int fpu_restore_sigcontext(struct fpucontext *buf) { return 0; } #endif /* CONFIG_FPU */ #endif /* __KERNEL__ */ #endif /* !__ASSEMBLY__ */ #endif /* _ASM_FPU_H */
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Kbuild | File | 314 B | 0644 |
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asm-offsets.h | File | 35 B | 0644 |
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atomic.h | File | 4.02 KB | 0644 |
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bitops.h | File | 5.42 KB | 0644 |
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bug.h | File | 864 B | 0644 |
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bugs.h | File | 561 B | 0644 |
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busctl-regs.h | File | 7.8 KB | 0644 |
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cache.h | File | 2.06 KB | 0644 |
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cacheflush.h | File | 7.6 KB | 0644 |
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checksum.h | File | 2.09 KB | 0644 |
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cmpxchg.h | File | 2.65 KB | 0644 |
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cpu-regs.h | File | 16.61 KB | 0644 |
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current.h | File | 922 B | 0644 |
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debugger.h | File | 1.2 KB | 0644 |
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delay.h | File | 597 B | 0644 |
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div64.h | File | 3.21 KB | 0644 |
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dma-mapping.h | File | 636 B | 0644 |
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dma.h | File | 3.09 KB | 0644 |
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dmactl-regs.h | File | 532 B | 0644 |
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elf.h | File | 4.49 KB | 0644 |
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emergency-restart.h | File | 43 B | 0644 |
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exceptions.h | File | 4.74 KB | 0644 |
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fpu.h | File | 3.57 KB | 0644 |
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frame.inc | File | 2.37 KB | 0644 |
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ftrace.h | File | 12 B | 0644 |
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futex.h | File | 31 B | 0644 |
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gdb-stub.h | File | 5.42 KB | 0644 |
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hardirq.h | File | 1.68 KB | 0644 |
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highmem.h | File | 3.01 KB | 0644 |
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hw_irq.h | File | 483 B | 0644 |
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intctl-regs.h | File | 2.26 KB | 0644 |
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io.h | File | 7.67 KB | 0644 |
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irq.h | File | 1.11 KB | 0644 |
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irq_regs.h | File | 751 B | 0644 |
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irqflags.h | File | 4.05 KB | 0644 |
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kdebug.h | File | 561 B | 0644 |
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kgdb.h | File | 1.7 KB | 0644 |
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kmap_types.h | File | 160 B | 0644 |
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kprobes.h | File | 1.59 KB | 0644 |
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linkage.h | File | 593 B | 0644 |
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local.h | File | 31 B | 0644 |
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local64.h | File | 33 B | 0644 |
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mc146818rtc.h | File | 26 B | 0644 |
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mmu.h | File | 434 B | 0644 |
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mmu_context.h | File | 4.44 KB | 0644 |
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module.h | File | 677 B | 0644 |
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nmi.h | File | 500 B | 0644 |
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page.h | File | 3.63 KB | 0644 |
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page_offset.h | File | 302 B | 0644 |
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pci.h | File | 2.17 KB | 0644 |
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percpu.h | File | 32 B | 0644 |
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pgalloc.h | File | 1.49 KB | 0644 |
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pgtable.h | File | 15.68 KB | 0644 |
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pio-regs.h | File | 7.53 KB | 0644 |
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processor.h | File | 4.12 KB | 0644 |
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ptrace.h | File | 805 B | 0644 |
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reset-regs.h | File | 1.8 KB | 0644 |
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rtc-regs.h | File | 3.57 KB | 0644 |
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rtc.h | File | 692 B | 0644 |
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rwlock.h | File | 2.98 KB | 0644 |
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serial-regs.h | File | 8.85 KB | 0644 |
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serial.h | File | 1.02 KB | 0644 |
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setup.h | File | 574 B | 0644 |
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shmparam.h | File | 182 B | 0644 |
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signal.h | File | 888 B | 0644 |
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smp.h | File | 3.06 KB | 0644 |
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smsc911x.h | File | 27 B | 0644 |
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spinlock.h | File | 3.84 KB | 0644 |
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spinlock_types.h | File | 445 B | 0644 |
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string.h | File | 1.03 KB | 0644 |
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switch_to.h | File | 1.49 KB | 0644 |
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syscall.h | File | 2.38 KB | 0644 |
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termios.h | File | 387 B | 0644 |
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thread_info.h | File | 4.36 KB | 0644 |
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timer-regs.h | File | 20.72 KB | 0644 |
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timex.h | File | 843 B | 0644 |
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tlb.h | File | 941 B | 0644 |
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tlbflush.h | File | 3.45 KB | 0644 |
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topology.h | File | 34 B | 0644 |
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types.h | File | 620 B | 0644 |
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uaccess.h | File | 7.78 KB | 0644 |
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ucontext.h | File | 673 B | 0644 |
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unaligned.h | File | 678 B | 0644 |
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unistd.h | File | 1.34 KB | 0644 |
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user.h | File | 1.91 KB | 0644 |
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vga.h | File | 471 B | 0644 |
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xor.h | File | 29 B | 0644 |
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