cpu.h revision 1.29
1 /* $NetBSD: cpu.h,v 1.29 1999/03/23 22:04:01 simonb 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 /* 45 * Exported definitions unique to NetBSD/mips cpu support. 46 */ 47 48 /* 49 * Macros to find the CPU architecture we're on at run-time, 50 * or if possible, at compile-time. 51 */ 52 53 #if (MIPS1 + MIPS3) == 1 54 #ifdef MIPS1 55 # define CPUISMIPS3 0 56 #endif /* mips1 */ 57 58 #ifdef MIPS3 59 # define CPUISMIPS3 1 60 #endif /* mips1 */ 61 62 #else /* run-time test */ 63 extern int cpu_arch; 64 #define CPUISMIPS3 (cpu_arch == 3) 65 #endif /* run-time test */ 66 67 /* 68 * definitions of cpu-dependent requirements 69 * referenced in generic code 70 */ 71 #define cpu_wait(p) /* nothing */ 72 #define cpu_swapout(p) panic("cpu_swapout: can't get here"); 73 74 /* 75 * Arguments to hardclock and gatherstats encapsulate the previous 76 * machine state in an opaque clockframe. 77 */ 78 struct clockframe { 79 int pc; /* program counter at time of interrupt */ 80 int sr; /* status register at time of interrupt */ 81 }; 82 83 /* 84 * A port must provde CLKF_USERMODE() and CLKF_BASEPRI() for use 85 * in machine-independent code. These differ on r4000 and r3000 systems; 86 * provide them in the port-dependent file that includes this one, using 87 * the macros below. 88 */ 89 90 /* mips1 versions */ 91 #define MIPS1_CLKF_USERMODE(framep) ((framep)->sr & MIPS_SR_KU_PREV) 92 #define MIPS1_CLKF_BASEPRI(framep) \ 93 ((~(framep)->sr & (MIPS_INT_MASK | MIPS_SR_INT_ENA_PREV)) == 0) 94 95 /* mips3 versions */ 96 #define MIPS3_CLKF_USERMODE(framep) ((framep)->sr & MIPS_SR_KSU_USER) 97 #define MIPS3_CLKF_BASEPRI(framep) \ 98 ((~(framep)->sr & (MIPS_INT_MASK | MIPS_SR_INT_ENAB)) == 0) 99 100 #define CLKF_PC(framep) ((framep)->pc) 101 #define CLKF_INTR(framep) (0) 102 103 #if defined(MIPS3) && !defined(MIPS1) 104 #define CLKF_USERMODE(framep) MIPS3_CLKF_USERMODE(framep) 105 #define CLKF_BASEPRI(framep) MIPS3_CLKF_BASEPRI(framep) 106 #endif 107 108 #if !defined(MIPS3) && defined(MIPS1) 109 #define CLKF_USERMODE(framep) MIPS1_CLKF_USERMODE(framep) 110 #define CLKF_BASEPRI(framep) MIPS1_CLKF_BASEPRI(framep) 111 #endif 112 113 114 #if defined(MIPS3) && defined(MIPS1) 115 #define CLKF_USERMODE(framep) \ 116 ((CPUISMIPS3) ? MIPS3_CLKF_USERMODE(framep): MIPS1_CLKF_USERMODE(framep)) 117 #define CLKF_BASEPRI(framep) \ 118 ((CPUISMIPS3) ? MIPS3_CLKF_BASEPRI(framep): MIPS1_CLKF_BASEPRI(framep)) 119 #endif 120 121 122 123 /* 124 * Preempt the current process if in interrupt from user mode, 125 * or after the current trap/syscall if in system mode. 126 */ 127 #define need_resched() { want_resched = 1; aston(); } 128 129 /* 130 * Give a profiling tick to the current process when the user profiling 131 * buffer pages are invalid. On the MIPS, request an ast to send us 132 * through trap, marking the proc as needing a profiling tick. 133 */ 134 #define need_proftick(p) { (p)->p_flag |= P_OWEUPC; aston(); } 135 136 /* 137 * Notify the current process (p) that it has a signal pending, 138 * process as soon as possible. 139 */ 140 #define signotify(p) aston() 141 142 #define aston() (astpending = 1) 143 144 extern int astpending; /* need to trap before returning to user mode */ 145 extern int want_resched; /* resched() was called */ 146 #ifdef MIPS3 147 extern u_int mips_L2CacheSize; 148 extern int mips_L2CacheIsSnooping; /* L2 cache snoops uncached writes ? */ 149 extern int mips_L2CacheMixed; 150 151 #ifdef MIPS3_INTERNAL_TIMER_INTERRUPT 152 extern u_int32_t mips3_intr_cycle_count; 153 extern u_int32_t mips3_timer_delta; 154 #endif 155 #endif 156 157 /* 158 * CTL_MACHDEP definitions. 159 */ 160 #define CPU_CONSDEV 1 /* dev_t: console terminal device */ 161 #define CPU_BOOTED_KERNEL 2 /* string: booted kernel name */ 162 #define CPU_MAXID 3 /* number of valid machdep ids */ 163 164 #define CTL_MACHDEP_NAMES { \ 165 { 0, 0 }, \ 166 { "console_device", CTLTYPE_STRUCT }, \ 167 { "booted_kernel", CTLTYPE_STRING }, \ 168 } 169 170 #ifdef _KERNEL 171 172 /* 173 * Misc prototypes. 174 */ 175 struct proc; 176 struct user; 177 178 /* trap.c */ 179 void child_return __P((void *)); 180 int kdbpeek __P((vaddr_t)); 181 182 /* mips_machdep.c */ 183 caddr_t allocsys __P((caddr_t)); 184 void dumpsys __P((void)); 185 int savectx __P((struct user *)); 186 void mips_init_msgbuf __P((void)); 187 void mips_init_proc0 __P((caddr_t)); 188 189 /* locore.S */ 190 void savefpregs __P((struct proc *)); 191 void switchfpregs __P((struct proc *, struct proc *)); 192 int badaddr __P((void *, size_t)); 193 194 /* mips_machdep.c */ 195 void cpu_identify __P((void)); 196 void mips_vector_init __P((void)); 197 198 #endif /* _KERNEL */ 199 200 #endif /* _CPU_H_ */ 201
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