141059Swilliam /*- 2*63359Sbostic * Copyright (c) 1990, 1993 3*63359Sbostic * The Regents of the University of California. 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*63359Sbostic * @(#)cpu.h 8.1 (Berkeley) 06/11/93 1140453Sbill */ 1240453Sbill 1349244Skarels /* 1449244Skarels * Definitions unique to i386 cpu support. 1549244Skarels */ 1656512Sbostic #include <machine/frame.h> 1756512Sbostic #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 */ 4463171Scgd struct clockframe { 4563171Scgd struct intrframe cf_if; 4663171Scgd }; 4749244Skarels 4863171Scgd #define CLKF_USERMODE(framep) (ISPL((framep)->cf_if.if_cs) == SEL_UPL) 4963171Scgd #define CLKF_BASEPRI(framep) ((framep)->cf_if.if_ppl == 0) 5063171Scgd #define CLKF_PC(framep) ((framep)->cf_if.if_eip) 5149244Skarels 5240453Sbill #define resettodr() /* no todr to set */ 5340453Sbill 5449244Skarels /* 5549244Skarels * Preempt the current process if in interrupt from user mode, 5649244Skarels * or after the current trap/syscall if in system mode. 5749244Skarels */ 5849244Skarels #define need_resched() { want_resched++; aston(); } 5949244Skarels 6049244Skarels /* 6149244Skarels * Give a profiling tick to the current process from the softclock 6249244Skarels * interrupt. On tahoe, request an ast to send us through trap(), 6349244Skarels * marking the proc as needing a profiling tick. 6449244Skarels */ 6549244Skarels #define profile_tick(p, framep) { (p)->p_flag |= SOWEUPC; aston(); } 6649244Skarels 6749244Skarels /* 6849244Skarels * Notify the current process (p) that it has a signal pending, 6949244Skarels * process as soon as possible. 7049244Skarels */ 7149244Skarels #define signotify(p) aston() 7249244Skarels 7349244Skarels #define aston() (astpending++) 7449244Skarels 7549244Skarels int astpending; /* need to trap before returning to user mode */ 7649244Skarels int want_resched; /* resched() was called */ 7749244Skarels 7849244Skarels /* 7949244Skarels * Kinds of processor 8049244Skarels */ 8149244Skarels 8249244Skarels #define CPU_386SX 0 8349244Skarels #define CPU_386 1 8449244Skarels #define CPU_486SX 2 8549244Skarels #define CPU_486 3 8649244Skarels #define CPU_586 4 8760205Smckusick 8860205Smckusick /* 8960205Smckusick * CTL_MACHDEP definitions. 9060205Smckusick */ 9160205Smckusick #define CPU_CONSDEV 1 /* dev_t: console terminal device */ 9260205Smckusick #define CPU_MAXID 2 /* number of valid machdep ids */ 9360205Smckusick 9460205Smckusick #define CTL_MACHDEP_NAMES { \ 9560205Smckusick { 0, 0 }, \ 9660205Smckusick { "console_device", CTLTYPE_STRUCT }, \ 9760205Smckusick } 98