1 /* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This software was developed by the Computer Systems Engineering group 6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 7 * contributed to Berkeley. 8 * 9 * All advertising materials mentioning features or use of this software 10 * must display the following acknowledgement: 11 * This product includes software developed by the University of 12 * California, Lawrence Berkeley Laboratory. 13 * 14 * %sccs.include.redist.c% 15 * 16 * @(#)cpu.h 8.1 (Berkeley) 06/11/93 17 * 18 * from: $Header: cpu.h,v 1.12 93/05/25 10:36:34 torek Exp $ (LBL) 19 */ 20 21 #ifndef _CPU_H_ 22 #define _CPU_H_ 23 24 /* 25 * CTL_MACHDEP definitinos. 26 */ 27 #define CPU_MAXID 1 /* no valid machdep ids */ 28 29 #define CTL_MACHDEP_NAMES { \ 30 { 0, 0 }, \ 31 } 32 33 #ifdef KERNEL 34 /* 35 * Exported definitions unique to SPARC cpu support. 36 */ 37 38 #include <machine/psl.h> 39 #include <sparc/sparc/intreg.h> 40 41 /* 42 * definitions of cpu-dependent requirements 43 * referenced in generic code 44 */ 45 #define COPY_SIGCODE /* copy sigcode above user stack in exec */ 46 47 #define cpu_exec(p) /* nothing */ 48 #define cpu_wait(p) /* nothing */ 49 #define cpu_setstack(p, ap) ((p)->p_md.md_tf->tf_out[6] = (ap) - 64) 50 51 /* 52 * Arguments to hardclock, softclock and gatherstats encapsulate the 53 * previous machine state in an opaque clockframe. The ipl is here 54 * as well for strayintr (see locore.s:interrupt and intr.c:strayintr). 55 * Note that CLKF_INTR is valid only if CLKF_USERMODE is false. 56 */ 57 struct clockframe { 58 u_int psr; /* psr before interrupt, excluding PSR_ET */ 59 u_int pc; /* pc at interrupt */ 60 u_int npc; /* npc at interrupt */ 61 u_int ipl; /* actual interrupt priority level */ 62 u_int fp; /* %fp at interrupt */ 63 }; 64 65 extern int eintstack[]; 66 67 #define CLKF_USERMODE(framep) (((framep)->psr & PSR_PS) == 0) 68 #define CLKF_BASEPRI(framep) (((framep)->psr & PSR_PIL) == 0) 69 #define CLKF_PC(framep) ((framep)->pc) 70 #define CLKF_INTR(framep) ((framep)->fp < (u_int)eintstack) 71 72 /* 73 * Software interrupt request `register'. 74 */ 75 union sir { 76 int sir_any; 77 char sir_which[4]; 78 } sir; 79 80 #define SIR_NET 0 81 #define SIR_CLOCK 1 82 83 #define setsoftint() ienab_bis(IE_L1) 84 #define setsoftnet() (sir.sir_which[SIR_NET] = 1, setsoftint()) 85 #define setsoftclock() (sir.sir_which[SIR_CLOCK] = 1, setsoftint()) 86 87 int want_ast; 88 89 /* 90 * Preempt the current process if in interrupt from user mode, 91 * or after the current trap/syscall if in system mode. 92 */ 93 int want_resched; /* resched() was called */ 94 #define need_resched() (want_resched = 1, want_ast = 1) 95 96 /* 97 * Give a profiling tick to the current process when the user profiling 98 * buffer pages are invalid. On the sparc, request an ast to send us 99 * through trap(), marking the proc as needing a profiling tick. 100 */ 101 #define need_proftick(p) ((p)->p_flag |= SOWEUPC, want_ast = 1) 102 103 /* 104 * Notify the current process (p) that it has a signal pending, 105 * process as soon as possible. 106 */ 107 #define signotify(p) (want_ast = 1) 108 109 /* 110 * Only one process may own the FPU state. 111 * 112 * XXX this must be per-cpu (eventually) 113 */ 114 struct proc *fpproc; /* FPU owner */ 115 int foundfpu; /* true => we have an FPU */ 116 117 /* 118 * Interrupt handler chains. Interrupt handlers should return 0 for 119 * ``not me'' or 1 (``I took care of it''). intr_establish() inserts a 120 * handler into the list. The handler is called with its (single) 121 * argument, or with a pointer to a clockframe if ih_arg is NULL. 122 */ 123 struct intrhand { 124 int (*ih_fun) __P((void *)); 125 void *ih_arg; 126 struct intrhand *ih_next; 127 } *intrhand[15]; 128 129 void intr_establish __P((int level, struct intrhand *)); 130 131 /* 132 * intr_fasttrap() is a lot like intr_establish, but is used for ``fast'' 133 * interrupt vectors (vectors that are not shared and are handled in the 134 * trap window). Such functions must be written in assembly. 135 */ 136 void intr_fasttrap __P((int level, void (*vec)(void))); 137 138 #endif /* KERNEL */ 139 #endif /* _CPU_H_ */ 140