141059Swilliam /*- 241059Swilliam * Copyright (c) 1990 The Regents of the University of California. 341059Swilliam * All rights reserved. 440453Sbill * 541059Swilliam * This code is derived from software contributed to Berkeley by 641059Swilliam * William Jolitz. 741059Swilliam * 846006Swilliam * %sccs.include.redist.c% 941059Swilliam * 10*49244Skarels * @(#)cpu.h 5.3 (Berkeley) 05/06/91 1140453Sbill */ 1240453Sbill 13*49244Skarels /* 14*49244Skarels * Definitions unique to i386 cpu support. 15*49244Skarels */ 16*49244Skarels #include "machine/frame.h" 17*49244Skarels #include "machine/segments.h" 18*49244Skarels 19*49244Skarels /* 20*49244Skarels * definitions of cpu-dependent requirements 21*49244Skarels * referenced in generic code 22*49244Skarels */ 23*49244Skarels #undef COPY_SIGCODE /* copy sigcode above user stack in exec */ 24*49244Skarels 25*49244Skarels /* 26*49244Skarels * function vs. inline configuration; 27*49244Skarels * these are defined to get generic functions 28*49244Skarels * rather than inline or machine-dependent implementations 29*49244Skarels */ 30*49244Skarels #define NEED_MINMAX /* need {,i,l,ul}{min,max} functions */ 31*49244Skarels #define NEED_FFS /* don't need ffs function */ 32*49244Skarels #define NEED_BCMP /* don't need bcmp function */ 33*49244Skarels #define NEED_STRLEN /* don't need strlen function */ 34*49244Skarels 35*49244Skarels #define cpu_exec(p) /* nothing */ 36*49244Skarels 37*49244Skarels /* 38*49244Skarels * Arguments to hardclock, softclock and gatherstats 39*49244Skarels * encapsulate the previous machine state in an opaque 40*49244Skarels * clockframe; for now, use generic intrframe. 41*49244Skarels */ 42*49244Skarels typedef struct intrframe clockframe; 43*49244Skarels 44*49244Skarels #define CLKF_USERMODE(framep) (ISPL((framep)->if_cs) == SEL_UPL) 45*49244Skarels #define CLKF_BASEPRI(framep) ((framep)->if_ppl == 0) 46*49244Skarels #define CLKF_PC(framep) ((framep)->if_eip) 47*49244Skarels 4840453Sbill #define resettodr() /* no todr to set */ 4940453Sbill 50*49244Skarels /* 51*49244Skarels * Preempt the current process if in interrupt from user mode, 52*49244Skarels * or after the current trap/syscall if in system mode. 53*49244Skarels */ 54*49244Skarels #define need_resched() { want_resched++; aston(); } 55*49244Skarels 56*49244Skarels /* 57*49244Skarels * Give a profiling tick to the current process from the softclock 58*49244Skarels * interrupt. On tahoe, request an ast to send us through trap(), 59*49244Skarels * marking the proc as needing a profiling tick. 60*49244Skarels */ 61*49244Skarels #define profile_tick(p, framep) { (p)->p_flag |= SOWEUPC; aston(); } 62*49244Skarels 63*49244Skarels /* 64*49244Skarels * Notify the current process (p) that it has a signal pending, 65*49244Skarels * process as soon as possible. 66*49244Skarels */ 67*49244Skarels #define signotify(p) aston() 68*49244Skarels 69*49244Skarels #define aston() (astpending++) 70*49244Skarels 71*49244Skarels int astpending; /* need to trap before returning to user mode */ 72*49244Skarels int want_resched; /* resched() was called */ 73*49244Skarels 74*49244Skarels /* 75*49244Skarels * Kinds of processor 76*49244Skarels */ 77*49244Skarels 78*49244Skarels #define CPU_386SX 0 79*49244Skarels #define CPU_386 1 80*49244Skarels #define CPU_486SX 2 81*49244Skarels #define CPU_486 3 82*49244Skarels #define CPU_586 4 83