1 /* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. 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 8.2 (Berkeley) 01/21/94 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_swapin(p) /* nothing */ 31 #define cpu_wait(p) /* nothing */ 32 #define cpu_setstack(p, ap) (p)->p_md.md_regs[SP] = ap 33 #define cpu_set_init_frame(p, fp) (p)->p_md.md_regs = fp 34 35 /* 36 * Arguments to hardclock and gatherstats encapsulate the previous 37 * machine state in an opaque clockframe. 38 */ 39 struct clockframe { 40 int pc; /* program counter at time of interrupt */ 41 int sr; /* status register at time of interrupt */ 42 }; 43 44 #define CLKF_USERMODE(framep) ((framep)->sr & MACH_SR_KU_PREV) 45 #define CLKF_BASEPRI(framep) \ 46 ((~(framep)->sr & (MACH_INT_MASK | MACH_SR_INT_ENA_PREV)) == 0) 47 #define CLKF_PC(framep) ((framep)->pc) 48 #define CLKF_INTR(framep) (0) 49 50 /* 51 * Preempt the current process if in interrupt from user mode, 52 * or after the current trap/syscall if in system mode. 53 */ 54 #define need_resched() { want_resched = 1; aston(); } 55 56 /* 57 * Give a profiling tick to the current process when the user profiling 58 * buffer pages are invalid. On the PMAX, request an ast to send us 59 * through trap, marking the proc as needing a profiling tick. 60 */ 61 #define need_proftick(p) { (p)->p_flag |= SOWEUPC; aston(); } 62 63 /* 64 * Notify the current process (p) that it has a signal pending, 65 * process as soon as possible. 66 */ 67 #define signotify(p) aston() 68 69 #define aston() (astpending = 1) 70 71 int astpending; /* need to trap before returning to user mode */ 72 int want_resched; /* resched() was called */ 73 74 /* 75 * CPU identification, from PRID register. 76 */ 77 union cpuprid { 78 int cpuprid; 79 struct { 80 #if BYTE_ORDER == BIG_ENDIAN 81 u_int pad1:16; /* reserved */ 82 u_int cp_imp:8; /* implementation identifier */ 83 u_int cp_majrev:4; /* major revision identifier */ 84 u_int cp_minrev:4; /* minor revision identifier */ 85 #else 86 u_int cp_minrev:4; /* minor revision identifier */ 87 u_int cp_majrev:4; /* major revision identifier */ 88 u_int cp_imp:8; /* implementation identifier */ 89 u_int pad1:16; /* reserved */ 90 #endif 91 } cpu; 92 }; 93 94 /* 95 * MIPS CPU types (cp_imp). 96 */ 97 #define MIPS_R2000 0x01 98 #define MIPS_R3000 0x02 99 #define MIPS_R6000 0x03 100 #define MIPS_R4000 0x04 101 #define MIPS_R6000A 0x06 102 103 /* 104 * MIPS FPU types 105 */ 106 #define MIPS_R2010_FPU 0x02 107 #define MIPS_R3010_FPU 0x03 108 #define MIPS_R6010_FPU 0x04 109 #define MIPS_R4000_FPU 0x05 110 111 struct intr_tab { 112 void (*func)(); /* pointer to interrupt routine */ 113 int unit; /* logical unit number */ 114 }; 115 116 #ifdef KERNEL 117 union cpuprid cpu; 118 union cpuprid fpu; 119 u_int machDataCacheSize; 120 u_int machInstCacheSize; 121 extern struct intr_tab intr_tab[]; 122 #endif 123 124 #endif /* _CPU_H_ */ 125