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*49523Swilliam * @(#)cpu.h 5.4 (Berkeley) 05/09/91 1140453Sbill */ 1240453Sbill 1349244Skarels /* 1449244Skarels * Definitions unique to i386 cpu support. 1549244Skarels */ 1649244Skarels #include "machine/frame.h" 1749244Skarels #include "machine/segments.h" 1849244Skarels 1949244Skarels /* 2049244Skarels * definitions of cpu-dependent requirements 2149244Skarels * referenced in generic code 2249244Skarels */ 23*49523Swilliam #undef COPY_SIGCODE /* don't copy sigcode above user stack in exec */ 2449244Skarels 2549244Skarels /* 2649244Skarels * function vs. inline configuration; 2749244Skarels * these are defined to get generic functions 2849244Skarels * rather than inline or machine-dependent implementations 2949244Skarels */ 3049244Skarels #define NEED_MINMAX /* need {,i,l,ul}{min,max} functions */ 31*49523Swilliam #define NEED_FFS /* need ffs function */ 32*49523Swilliam #define NEED_BCMP /* need bcmp function */ 33*49523Swilliam #define NEED_STRLEN /* need strlen function */ 3449244Skarels 3549244Skarels #define cpu_exec(p) /* nothing */ 3649244Skarels 3749244Skarels /* 3849244Skarels * Arguments to hardclock, softclock and gatherstats 3949244Skarels * encapsulate the previous machine state in an opaque 4049244Skarels * clockframe; for now, use generic intrframe. 4149244Skarels */ 4249244Skarels typedef struct intrframe clockframe; 4349244Skarels 4449244Skarels #define CLKF_USERMODE(framep) (ISPL((framep)->if_cs) == SEL_UPL) 4549244Skarels #define CLKF_BASEPRI(framep) ((framep)->if_ppl == 0) 4649244Skarels #define CLKF_PC(framep) ((framep)->if_eip) 4749244Skarels 4840453Sbill #define resettodr() /* no todr to set */ 4940453Sbill 5049244Skarels /* 5149244Skarels * Preempt the current process if in interrupt from user mode, 5249244Skarels * or after the current trap/syscall if in system mode. 5349244Skarels */ 5449244Skarels #define need_resched() { want_resched++; aston(); } 5549244Skarels 5649244Skarels /* 5749244Skarels * Give a profiling tick to the current process from the softclock 5849244Skarels * interrupt. On tahoe, request an ast to send us through trap(), 5949244Skarels * marking the proc as needing a profiling tick. 6049244Skarels */ 6149244Skarels #define profile_tick(p, framep) { (p)->p_flag |= SOWEUPC; aston(); } 6249244Skarels 6349244Skarels /* 6449244Skarels * Notify the current process (p) that it has a signal pending, 6549244Skarels * process as soon as possible. 6649244Skarels */ 6749244Skarels #define signotify(p) aston() 6849244Skarels 6949244Skarels #define aston() (astpending++) 7049244Skarels 7149244Skarels int astpending; /* need to trap before returning to user mode */ 7249244Skarels int want_resched; /* resched() was called */ 7349244Skarels 7449244Skarels /* 7549244Skarels * Kinds of processor 7649244Skarels */ 7749244Skarels 7849244Skarels #define CPU_386SX 0 7949244Skarels #define CPU_386 1 8049244Skarels #define CPU_486SX 2 8149244Skarels #define CPU_486 3 8249244Skarels #define CPU_586 4 83