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 8.3 (Berkeley) 05/17/95 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 #define BACKTRACE(p) /* not implemented */ 35 36 /* 37 * Arguments to hardclock and gatherstats encapsulate the previous 38 * machine state in an opaque clockframe. 39 */ 40 struct clockframe { 41 int pc; /* program counter at time of interrupt */ 42 int sr; /* status register at time of interrupt */ 43 }; 44 45 #define CLKF_USERMODE(framep) ((framep)->sr & MACH_SR_KU_PREV) 46 #define CLKF_BASEPRI(framep) \ 47 ((~(framep)->sr & (MACH_INT_MASK | MACH_SR_INT_ENA_PREV)) == 0) 48 #define CLKF_PC(framep) ((framep)->pc) 49 #define CLKF_INTR(framep) (0) 50 51 /* 52 * Preempt the current process if in interrupt from user mode, 53 * or after the current trap/syscall if in system mode. 54 */ 55 #define need_resched() { want_resched = 1; aston(); } 56 57 /* 58 * Give a profiling tick to the current process when the user profiling 59 * buffer pages are invalid. On the PMAX, request an ast to send us 60 * through trap, marking the proc as needing a profiling tick. 61 */ 62 #define need_proftick(p) { (p)->p_flag |= SOWEUPC; aston(); } 63 64 /* 65 * Notify the current process (p) that it has a signal pending, 66 * process as soon as possible. 67 */ 68 #define signotify(p) aston() 69 70 #define aston() (astpending = 1) 71 72 int astpending; /* need to trap before returning to user mode */ 73 int want_resched; /* resched() was called */ 74 75 /* 76 * CPU identification, from PRID register. 77 */ 78 union cpuprid { 79 int cpuprid; 80 struct { 81 #if BYTE_ORDER == BIG_ENDIAN 82 u_int pad1:16; /* reserved */ 83 u_int cp_imp:8; /* implementation identifier */ 84 u_int cp_majrev:4; /* major revision identifier */ 85 u_int cp_minrev:4; /* minor revision identifier */ 86 #else 87 u_int cp_minrev:4; /* minor revision identifier */ 88 u_int cp_majrev:4; /* major revision identifier */ 89 u_int cp_imp:8; /* implementation identifier */ 90 u_int pad1:16; /* reserved */ 91 #endif 92 } cpu; 93 }; 94 95 /* 96 * MIPS CPU types (cp_imp). 97 */ 98 #define MIPS_R2000 0x01 99 #define MIPS_R3000 0x02 100 #define MIPS_R6000 0x03 101 #define MIPS_R4000 0x04 102 #define MIPS_R6000A 0x06 103 104 /* 105 * MIPS FPU types 106 */ 107 #define MIPS_R2010_FPU 0x02 108 #define MIPS_R3010_FPU 0x03 109 #define MIPS_R6010_FPU 0x04 110 #define MIPS_R4000_FPU 0x05 111 112 struct intr_tab { 113 void (*func)(); /* pointer to interrupt routine */ 114 int unit; /* logical unit number */ 115 }; 116 117 #ifdef KERNEL 118 union cpuprid cpu; 119 union cpuprid fpu; 120 u_int machDataCacheSize; 121 u_int machInstCacheSize; 122 extern struct intr_tab intr_tab[]; 123 #endif 124 125 #endif /* _CPU_H_ */ 126