projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| af5295ff KM |
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 | * | |
| 6d429c8e | 11 | * @(#)cpu.h 7.2 (Berkeley) %G% |
| af5295ff KM |
12 | */ |
| 13 | ||
| 14 | #ifndef _CPU_H_ | |
| 15 | #define _CPU_H_ | |
| 16 | ||
| 17 | #include "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 | #undef COPY_SIGCODE /* copy sigcode above user stack in exec */ | |
| 28 | ||
| af5295ff KM |
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 | /* | |
| 6d429c8e KB |
35 | * Arguments to hardclock and gatherstats encapsulate the previous |
| 36 | * machine state in an opaque clockframe. | |
| af5295ff | 37 | */ |
| 6d429c8e KB |
38 | struct clockframe { |
| 39 | int pc; /* program counter at time of interrupt */ | |
| 40 | int sr; /* status register at time of interrupt */ | |
| 41 | }; | |
| af5295ff | 42 | |
| 6d429c8e | 43 | #define CLKF_USERMODE(framep) ((framep)->sr & MACH_SR_KU_PREV) |
| af5295ff | 44 | #define CLKF_BASEPRI(framep) \ |
| 6d429c8e | 45 | ((~(framep)->sr & (MACH_INT_MASK | MACH_SR_INT_ENA_PREV)) == 0) |
| af5295ff | 46 | #define CLKF_PC(framep) ((framep)->pc) |
| 6d429c8e | 47 | #define CLKF_INTR(framep) (0) |
| af5295ff KM |
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 | /* | |
| 6d429c8e KB |
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. | |
| af5295ff | 59 | */ |
| 6d429c8e | 60 | #define need_proftick(p) { (p)->p_flag |= SOWEUPC; aston(); } |
| af5295ff KM |
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_ */ |