1 /* $NetBSD: cpu.h,v 1.9 1995/03/28 18:19:12 jtc Exp $ */ 2 3 /*- 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Ralph Campbell and Rick Macklem. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)cpu.h 8.4 (Berkeley) 1/4/94 39 */ 40 41 #ifndef _CPU_H_ 42 #define _CPU_H_ 43 44 #include <machine/machConst.h> 45 46 /* 47 * Exported definitions unique to pmax/mips cpu support. 48 */ 49 50 /* 51 * definitions of cpu-dependent requirements 52 * referenced in generic code 53 */ 54 #define COPY_SIGCODE /* copy sigcode above user stack in exec */ 55 56 #define cpu_exec(p) (p->p_md.md_ss_addr = 0) /* init single step */ 57 #define cpu_wait(p) /* nothing */ 58 #define cpu_set_init_frame(p, fp) /* nothing */ 59 60 /* 61 * Arguments to hardclock and gatherstats encapsulate the previous 62 * machine state in an opaque clockframe. 63 */ 64 struct clockframe { 65 int pc; /* program counter at time of interrupt */ 66 int sr; /* status register at time of interrupt */ 67 }; 68 69 #define CLKF_USERMODE(framep) ((framep)->sr & MACH_SR_KU_PREV) 70 #define CLKF_BASEPRI(framep) \ 71 ((~(framep)->sr & (MACH_INT_MASK | MACH_SR_INT_ENA_PREV)) == 0) 72 #define CLKF_PC(framep) ((framep)->pc) 73 #define CLKF_INTR(framep) (0) 74 75 /* 76 * Preempt the current process if in interrupt from user mode, 77 * or after the current trap/syscall if in system mode. 78 */ 79 #define need_resched() { want_resched = 1; aston(); } 80 81 /* 82 * Give a profiling tick to the current process when the user profiling 83 * buffer pages are invalid. On the PMAX, request an ast to send us 84 * through trap, marking the proc as needing a profiling tick. 85 */ 86 #define need_proftick(p) { (p)->p_flag |= P_OWEUPC; aston(); } 87 88 /* 89 * Notify the current process (p) that it has a signal pending, 90 * process as soon as possible. 91 */ 92 #define signotify(p) aston() 93 94 #define aston() (astpending = 1) 95 96 int astpending; /* need to trap before returning to user mode */ 97 int want_resched; /* resched() was called */ 98 99 /* 100 * CPU identification, from PRID register. 101 */ 102 union cpuprid { 103 int cpuprid; 104 struct { 105 #if BYTE_ORDER == BIG_ENDIAN 106 u_int pad1:16; /* reserved */ 107 u_int cp_imp:8; /* implementation identifier */ 108 u_int cp_majrev:4; /* major revision identifier */ 109 u_int cp_minrev:4; /* minor revision identifier */ 110 #else 111 u_int cp_minrev:4; /* minor revision identifier */ 112 u_int cp_majrev:4; /* major revision identifier */ 113 u_int cp_imp:8; /* implementation identifier */ 114 u_int pad1:16; /* reserved */ 115 #endif 116 } cpu; 117 }; 118 119 /* 120 * CTL_MACHDEP definitions. 121 */ 122 #define CPU_CONSDEV 1 /* dev_t: console terminal device */ 123 #define CPU_MAXID 2 /* number of valid machdep ids */ 124 125 #define CTL_MACHDEP_NAMES { \ 126 { 0, 0 }, \ 127 { "console_device", CTLTYPE_STRUCT }, \ 128 } 129 130 /* 131 * MIPS CPU types (cp_imp). 132 */ 133 #define MIPS_R2000 0x01 134 #define MIPS_R3000 0x02 135 #define MIPS_R6000 0x03 136 #define MIPS_R4000 0x04 137 #define MIPS_R6000A 0x06 138 139 /* 140 * MIPS FPU types 141 */ 142 #define MIPS_R2010 0x02 143 #define MIPS_R3010 0x03 144 #define MIPS_R6010 0x04 145 #define MIPS_R4010 0x05 146 147 #ifdef _KERNEL 148 union cpuprid cpu; 149 union cpuprid fpu; 150 u_int machDataCacheSize; 151 u_int machInstCacheSize; 152 extern struct intr_tab intr_tab[]; 153 #endif 154 155 /* 156 * Enable realtime clock (always enabled). 157 */ 158 #define enablertclock() 159 160 #endif /* _CPU_H_ */ 161