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*56512Sbostic * @(#)cpu.h 5.6 (Berkeley) 10/11/92 1140453Sbill */ 1240453Sbill 1349244Skarels /* 1449244Skarels * Definitions unique to i386 cpu support. 1549244Skarels */ 16*56512Sbostic #include <machine/frame.h> 17*56512Sbostic #include <machine/segments.h> 1849244Skarels 1949244Skarels /* 2049244Skarels * definitions of cpu-dependent requirements 2149244Skarels * referenced in generic code 2249244Skarels */ 2349523Swilliam #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 */ 3149523Swilliam #define NEED_FFS /* need ffs function */ 3249523Swilliam #define NEED_BCMP /* need bcmp function */ 3349523Swilliam #define NEED_STRLEN /* need strlen function */ 3449244Skarels 3549244Skarels #define cpu_exec(p) /* nothing */ 3652379Smckusick #define cpu_setstack(p, ap) \ 3752379Smckusick (p)->p_md.md_regs[SP] = ap 3849244Skarels 3949244Skarels /* 4049244Skarels * Arguments to hardclock, softclock and gatherstats 4149244Skarels * encapsulate the previous machine state in an opaque 4249244Skarels * clockframe; for now, use generic intrframe. 4349244Skarels */ 4449244Skarels typedef struct intrframe clockframe; 4549244Skarels 4649244Skarels #define CLKF_USERMODE(framep) (ISPL((framep)->if_cs) == SEL_UPL) 4749244Skarels #define CLKF_BASEPRI(framep) ((framep)->if_ppl == 0) 4849244Skarels #define CLKF_PC(framep) ((framep)->if_eip) 4949244Skarels 5040453Sbill #define resettodr() /* no todr to set */ 5140453Sbill 5249244Skarels /* 5349244Skarels * Preempt the current process if in interrupt from user mode, 5449244Skarels * or after the current trap/syscall if in system mode. 5549244Skarels */ 5649244Skarels #define need_resched() { want_resched++; aston(); } 5749244Skarels 5849244Skarels /* 5949244Skarels * Give a profiling tick to the current process from the softclock 6049244Skarels * interrupt. On tahoe, request an ast to send us through trap(), 6149244Skarels * marking the proc as needing a profiling tick. 6249244Skarels */ 6349244Skarels #define profile_tick(p, framep) { (p)->p_flag |= SOWEUPC; aston(); } 6449244Skarels 6549244Skarels /* 6649244Skarels * Notify the current process (p) that it has a signal pending, 6749244Skarels * process as soon as possible. 6849244Skarels */ 6949244Skarels #define signotify(p) aston() 7049244Skarels 7149244Skarels #define aston() (astpending++) 7249244Skarels 7349244Skarels int astpending; /* need to trap before returning to user mode */ 7449244Skarels int want_resched; /* resched() was called */ 7549244Skarels 7649244Skarels /* 7749244Skarels * Kinds of processor 7849244Skarels */ 7949244Skarels 8049244Skarels #define CPU_386SX 0 8149244Skarels #define CPU_386 1 8249244Skarels #define CPU_486SX 2 8349244Skarels #define CPU_486 3 8449244Skarels #define CPU_586 4 85