mirror of https://gitee.com/openkylin/linux.git
79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
/*
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* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
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* Licensed under the GPL
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*/
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#ifndef __UM_PROCESSOR_I386_H
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#define __UM_PROCESSOR_I386_H
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#include "linux/string.h"
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#include <sysdep/host_ldt.h>
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#include "asm/segment.h"
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extern int host_has_cmov;
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/* include faultinfo structure */
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#include "sysdep/faultinfo.h"
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struct uml_tls_struct {
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struct user_desc tls;
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unsigned flushed:1;
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unsigned present:1;
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};
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struct arch_thread {
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struct uml_tls_struct tls_array[GDT_ENTRY_TLS_ENTRIES];
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unsigned long debugregs[8];
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int debugregs_seq;
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struct faultinfo faultinfo;
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};
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#define INIT_ARCH_THREAD { \
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.tls_array = { [ 0 ... GDT_ENTRY_TLS_ENTRIES - 1 ] = \
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{ .present = 0, .flushed = 0 } }, \
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.debugregs = { [ 0 ... 7 ] = 0 }, \
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.debugregs_seq = 0, \
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.faultinfo = { 0, 0, 0 } \
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}
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static inline void arch_flush_thread(struct arch_thread *thread)
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{
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/* Clear any TLS still hanging */
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memset(&thread->tls_array, 0, sizeof(thread->tls_array));
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}
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static inline void arch_copy_thread(struct arch_thread *from,
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struct arch_thread *to)
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{
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memcpy(&to->tls_array, &from->tls_array, sizeof(from->tls_array));
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}
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#include <asm/user.h>
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/* REP NOP (PAUSE) is a good thing to insert into busy-wait loops. */
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static inline void rep_nop(void)
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{
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__asm__ __volatile__("rep;nop": : :"memory");
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}
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#define cpu_relax() rep_nop()
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/*
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* Default implementation of macro that returns current
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* instruction pointer ("program counter"). Stolen
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* from asm-i386/processor.h
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*/
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#define current_text_addr() \
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({ void *pc; __asm__("movl $1f,%0\n1:":"=g" (pc)); pc; })
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#define ARCH_IS_STACKGROW(address) \
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(address + 32 >= UPT_SP(¤t->thread.regs.regs))
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#define KSTK_EIP(tsk) KSTK_REG(tsk, EIP)
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#define KSTK_ESP(tsk) KSTK_REG(tsk, UESP)
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#define KSTK_EBP(tsk) KSTK_REG(tsk, EBP)
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#include "asm/processor-generic.h"
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#endif
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