/*- * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * William Jolitz. * * %sccs.include.redist.c% * * @(#)pcb.h 5.10 (Berkeley) 05/12/91 */ /* * Intel 386 process control block */ #include "machine/tss.h" #include "machine/npx.h" struct pcb { struct i386tss pcb_tss; #define pcb_ksp pcb_tss.tss_esp0 #define pcb_ptd pcb_tss.tss_cr3 #define pcb_cr3 pcb_ptd #define pcb_pc pcb_tss.tss_eip #define pcb_psl pcb_tss.tss_eflags #define pcb_usp pcb_tss.tss_esp #define pcb_fp pcb_tss.tss_ebp #ifdef notyet u_char pcb_iomap[NPORT/sizeof(u_char)]; /* i/o port bitmap */ #endif struct save87 pcb_savefpu; /* floating point state for 287/387 */ struct emcsts pcb_saveemc; /* Cyrix EMC state */ /* * Software pcb (extension) */ int pcb_flags; #define FP_WASUSED 0x01 /* floating point has been used in this proc */ #define FP_NEEDSSAVE 0x02 /* needs save on next context switch */ #define FP_NEEDSRESTORE 0x04 /* need restore on next DNA fault */ #define FP_USESEMC 0x08 /* process uses EMC memory-mapped mode */ #define FM_TRAP 0x10 /* process entered kernel on a trap frame */ short pcb_iml; /* interrupt mask level */ caddr_t pcb_onfault; /* copyin/out fault recovery */ long pcb_sigc[8]; /* XXX signal code trampoline */ int pcb_cmap2; /* XXX temporary PTE - will prefault instead */ }; #ifdef KERNEL struct pcb *curpcb; /* our current running pcb */ #endif