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