1 /* 2 * Copyright (c) 1992 Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Ralph Campbell and Kazumasa Utashiro of Software Research 7 * Associates, Inc. 8 * 9 * %sccs.include.redist.c% 10 * 11 * @(#)cpu.h 7.4 (Berkeley) 01/20/93 12 */ 13 14 #ifndef _CPU_H_ 15 #define _CPU_H_ 16 17 #include <machine/machConst.h> 18 19 /* 20 * Exported definitions unique to pmax/mips cpu support. 21 */ 22 23 /* 24 * definitions of cpu-dependent requirements 25 * referenced in generic code 26 */ 27 #define COPY_SIGCODE /* copy sigcode above user stack in exec */ 28 29 #define cpu_exec(p) (p->p_md.md_ss_addr = 0) /* init single step */ 30 #define cpu_wait(p) /* nothing */ 31 #define cpu_setstack(p, ap) \ 32 (p)->p_md.md_regs[SP] = ap 33 34 /* 35 * Arguments to hardclock and gatherstats encapsulate the previous 36 * machine state in an opaque clockframe. 37 */ 38 struct clockframe { 39 int pc; /* program counter at time of interrupt */ 40 int sr; /* status register at time of interrupt */ 41 }; 42 43 #define CLKF_USERMODE(framep) ((framep)->sr & MACH_SR_KU_PREV) 44 #define CLKF_BASEPRI(framep) \ 45 ((~(framep)->sr & (MACH_INT_MASK | MACH_SR_INT_ENA_PREV)) == 0) 46 #define CLKF_PC(framep) ((framep)->pc) 47 #define CLKF_INTR(framep) (0) 48 49 /* 50 * Preempt the current process if in interrupt from user mode, 51 * or after the current trap/syscall if in system mode. 52 */ 53 #define need_resched() { want_resched = 1; aston(); } 54 55 /* 56 * Give a profiling tick to the current process when the user profiling 57 * buffer pages are invalid. On the PMAX, request an ast to send us 58 * through trap, marking the proc as needing a profiling tick. 59 */ 60 #define need_proftick(p) { (p)->p_flag |= SOWEUPC; aston(); } 61 62 /* 63 * Notify the current process (p) that it has a signal pending, 64 * process as soon as possible. 65 */ 66 #define signotify(p) aston() 67 68 #define aston() (astpending = 1) 69 70 int astpending; /* need to trap before returning to user mode */ 71 int want_resched; /* resched() was called */ 72 73 /* 74 * CPU identification, from PRID register. 75 */ 76 union cpuprid { 77 int cpuprid; 78 struct { 79 #if BYTE_ORDER == BIG_ENDIAN 80 u_int pad1:16; /* reserved */ 81 u_int cp_imp:8; /* implementation identifier */ 82 u_int cp_majrev:4; /* major revision identifier */ 83 u_int cp_minrev:4; /* minor revision identifier */ 84 #else 85 u_int cp_minrev:4; /* minor revision identifier */ 86 u_int cp_majrev:4; /* major revision identifier */ 87 u_int cp_imp:8; /* implementation identifier */ 88 u_int pad1:16; /* reserved */ 89 #endif 90 } cpu; 91 }; 92 93 /* 94 * MIPS CPU types (cp_imp). 95 */ 96 #define MIPS_R2000 0x01 97 #define MIPS_R3000 0x02 98 #define MIPS_R6000 0x03 99 #define MIPS_R4000 0x04 100 #define MIPS_R6000A 0x06 101 102 /* 103 * MIPS FPU types 104 */ 105 #define MIPS_R2010_FPU 0x02 106 #define MIPS_R3010_FPU 0x03 107 #define MIPS_R6010_FPU 0x04 108 #define MIPS_R4000_FPU 0x05 109 110 struct intr_tab { 111 void (*func)(); /* pointer to interrupt routine */ 112 int unit; /* logical unit number */ 113 }; 114 115 #ifdef KERNEL 116 union cpuprid cpu; 117 union cpuprid fpu; 118 u_int machDataCacheSize; 119 u_int machInstCacheSize; 120 extern struct intr_tab intr_tab[]; 121 #endif 122 123 #endif /* _CPU_H_ */ 124