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 8.5 (Berkeley) 05/17/95 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_swapin(p) /* nothing */ 49 #define cpu_wait(p) /* nothing */ 50 #define cpu_setstack(p, ap) ((p)->p_md.md_tf->tf_out[6] = (ap) - 64) 51 #define BACKTRACE(p) /* not implemented */ 52 53 /* 54 * See syscall() for an explanation of the following. Note that the 55 * locore bootstrap code follows the syscall stack protocol. The 56 * framep argument is unused. 57 */ 58 #define cpu_set_init_frame(p, fp) \ 59 (p)->p_md.md_tf = (struct trapframe *) \ 60 ((caddr_t)(p)->p_addr + UPAGES * NBPG - sizeof(struct trapframe)) 61 62 /* 63 * Arguments to hardclock, softclock and gatherstats encapsulate the 64 * previous machine state in an opaque clockframe. The ipl is here 65 * as well for strayintr (see locore.s:interrupt and intr.c:strayintr). 66 * Note that CLKF_INTR is valid only if CLKF_USERMODE is false. 67 */ 68 struct clockframe { 69 u_int psr; /* psr before interrupt, excluding PSR_ET */ 70 u_int pc; /* pc at interrupt */ 71 u_int npc; /* npc at interrupt */ 72 u_int ipl; /* actual interrupt priority level */ 73 u_int fp; /* %fp at interrupt */ 74 }; 75 76 extern int eintstack[]; 77 78 #define CLKF_USERMODE(framep) (((framep)->psr & PSR_PS) == 0) 79 #define CLKF_BASEPRI(framep) (((framep)->psr & PSR_PIL) == 0) 80 #define CLKF_PC(framep) ((framep)->pc) 81 #define CLKF_INTR(framep) ((framep)->fp < (u_int)eintstack) 82 83 /* 84 * Software interrupt request `register'. 85 */ 86 union sir { 87 int sir_any; 88 char sir_which[4]; 89 } sir; 90 91 #define SIR_NET 0 92 #define SIR_CLOCK 1 93 94 #define setsoftint() ienab_bis(IE_L1) 95 #define setsoftnet() (sir.sir_which[SIR_NET] = 1, setsoftint()) 96 #define setsoftclock() (sir.sir_which[SIR_CLOCK] = 1, setsoftint()) 97 98 int want_ast; 99 100 /* 101 * Preempt the current process if in interrupt from user mode, 102 * or after the current trap/syscall if in system mode. 103 */ 104 int want_resched; /* resched() was called */ 105 #define need_resched() (want_resched = 1, want_ast = 1) 106 107 /* 108 * Give a profiling tick to the current process when the user profiling 109 * buffer pages are invalid. On the sparc, request an ast to send us 110 * through trap(), marking the proc as needing a profiling tick. 111 */ 112 #define need_proftick(p) ((p)->p_flag |= P_OWEUPC, want_ast = 1) 113 114 /* 115 * Notify the current process (p) that it has a signal pending, 116 * process as soon as possible. 117 */ 118 #define signotify(p) (want_ast = 1) 119 120 /* 121 * Only one process may own the FPU state. 122 * 123 * XXX this must be per-cpu (eventually) 124 */ 125 struct proc *fpproc; /* FPU owner */ 126 int foundfpu; /* true => we have an FPU */ 127 128 /* 129 * Interrupt handler chains. Interrupt handlers should return 0 for 130 * ``not me'' or 1 (``I took care of it''). intr_establish() inserts a 131 * handler into the list. The handler is called with its (single) 132 * argument, or with a pointer to a clockframe if ih_arg is NULL. 133 */ 134 struct intrhand { 135 int (*ih_fun) __P((void *)); 136 void *ih_arg; 137 struct intrhand *ih_next; 138 } *intrhand[15]; 139 140 void intr_establish __P((int level, struct intrhand *)); 141 142 /* 143 * intr_fasttrap() is a lot like intr_establish, but is used for ``fast'' 144 * interrupt vectors (vectors that are not shared and are handled in the 145 * trap window). Such functions must be written in assembly. 146 */ 147 void intr_fasttrap __P((int level, void (*vec)(void))); 148 149 #endif /* KERNEL */ 150 #endif /* _CPU_H_ */ 151