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 8.3 (Berkeley) 12/10/93 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 * See syscall() for an explanation of the following. Note that the 53 * locore bootstrap code follows the syscall stack protocol. The 54 * framep argument is unused. 55 */ 56 #define cpu_set_init_frame(p, fp) \ 57 (p)->p_md.md_tf = (struct trapframe *) \ 58 ((caddr_t)(p)->p_addr + UPAGES * NBPG - sizeof(struct trapframe)) 59 60 /* 61 * Arguments to hardclock, softclock and gatherstats encapsulate the 62 * previous machine state in an opaque clockframe. The ipl is here 63 * as well for strayintr (see locore.s:interrupt and intr.c:strayintr). 64 * Note that CLKF_INTR is valid only if CLKF_USERMODE is false. 65 */ 66 struct clockframe { 67 u_int psr; /* psr before interrupt, excluding PSR_ET */ 68 u_int pc; /* pc at interrupt */ 69 u_int npc; /* npc at interrupt */ 70 u_int ipl; /* actual interrupt priority level */ 71 u_int fp; /* %fp at interrupt */ 72 }; 73 74 extern int eintstack[]; 75 76 #define CLKF_USERMODE(framep) (((framep)->psr & PSR_PS) == 0) 77 #define CLKF_BASEPRI(framep) (((framep)->psr & PSR_PIL) == 0) 78 #define CLKF_PC(framep) ((framep)->pc) 79 #define CLKF_INTR(framep) ((framep)->fp < (u_int)eintstack) 80 81 /* 82 * Software interrupt request `register'. 83 */ 84 union sir { 85 int sir_any; 86 char sir_which[4]; 87 } sir; 88 89 #define SIR_NET 0 90 #define SIR_CLOCK 1 91 92 #define setsoftint() ienab_bis(IE_L1) 93 #define setsoftnet() (sir.sir_which[SIR_NET] = 1, setsoftint()) 94 #define setsoftclock() (sir.sir_which[SIR_CLOCK] = 1, setsoftint()) 95 96 int want_ast; 97 98 /* 99 * Preempt the current process if in interrupt from user mode, 100 * or after the current trap/syscall if in system mode. 101 */ 102 int want_resched; /* resched() was called */ 103 #define need_resched() (want_resched = 1, want_ast = 1) 104 105 /* 106 * Give a profiling tick to the current process when the user profiling 107 * buffer pages are invalid. On the sparc, request an ast to send us 108 * through trap(), marking the proc as needing a profiling tick. 109 */ 110 #define need_proftick(p) ((p)->p_flag |= P_OWEUPC, want_ast = 1) 111 112 /* 113 * Notify the current process (p) that it has a signal pending, 114 * process as soon as possible. 115 */ 116 #define signotify(p) (want_ast = 1) 117 118 /* 119 * Only one process may own the FPU state. 120 * 121 * XXX this must be per-cpu (eventually) 122 */ 123 struct proc *fpproc; /* FPU owner */ 124 int foundfpu; /* true => we have an FPU */ 125 126 /* 127 * Interrupt handler chains. Interrupt handlers should return 0 for 128 * ``not me'' or 1 (``I took care of it''). intr_establish() inserts a 129 * handler into the list. The handler is called with its (single) 130 * argument, or with a pointer to a clockframe if ih_arg is NULL. 131 */ 132 struct intrhand { 133 int (*ih_fun) __P((void *)); 134 void *ih_arg; 135 struct intrhand *ih_next; 136 } *intrhand[15]; 137 138 void intr_establish __P((int level, struct intrhand *)); 139 140 /* 141 * intr_fasttrap() is a lot like intr_establish, but is used for ``fast'' 142 * interrupt vectors (vectors that are not shared and are handled in the 143 * trap window). Such functions must be written in assembly. 144 */ 145 void intr_fasttrap __P((int level, void (*vec)(void))); 146 147 #endif /* KERNEL */ 148 #endif /* _CPU_H_ */ 149