cpu.h revision 1.33
1 /* $NetBSD: cpu.h,v 1.33 2000/01/09 13:24:14 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 * CTL_MACHDEP definitions. 50 */ 51 #define CPU_CONSDEV 1 /* dev_t: console terminal device */ 52 #define CPU_BOOTED_KERNEL 2 /* string: booted kernel name */ 53 #define CPU_ROOT_DEVICE 3 /* string: root device name */ 54 #define CPU_MAXID 4 /* number of valid machdep ids */ 55 56 #define CTL_MACHDEP_NAMES { \ 57 { 0, 0 }, \ 58 { "console_device", CTLTYPE_STRUCT }, \ 59 { "booted_kernel", CTLTYPE_STRING }, \ 60 { "root_device", CTLTYPE_STRING }, \ 61 } 62 63 #ifdef _KERNEL 64 #ifndef _LOCORE 65 66 /* 67 * Macros to find the CPU architecture we're on at run-time, 68 * or if possible, at compile-time. 69 */ 70 71 #if (MIPS1 + MIPS3) == 1 72 #ifdef MIPS1 73 # define CPUISMIPS3 0 74 #endif /* mips1 */ 75 76 #ifdef MIPS3 77 # define CPUISMIPS3 1 78 #endif /* mips1 */ 79 80 #else /* run-time test */ 81 extern int cpu_arch; 82 #define CPUISMIPS3 (cpu_arch == 3) 83 #endif /* run-time test */ 84 85 /* 86 * definitions of cpu-dependent requirements 87 * referenced in generic code 88 */ 89 #define cpu_wait(p) /* nothing */ 90 #define cpu_swapout(p) panic("cpu_swapout: can't get here"); 91 #define cpu_number() 0 92 93 /* 94 * Arguments to hardclock and gatherstats encapsulate the previous 95 * machine state in an opaque clockframe. 96 */ 97 struct clockframe { 98 int pc; /* program counter at time of interrupt */ 99 int sr; /* status register at time of interrupt */ 100 }; 101 102 /* 103 * A port must provde CLKF_USERMODE() and CLKF_BASEPRI() for use 104 * in machine-independent code. These differ on r4000 and r3000 systems; 105 * provide them in the port-dependent file that includes this one, using 106 * the macros below. 107 */ 108 109 /* mips1 versions */ 110 #define MIPS1_CLKF_USERMODE(framep) ((framep)->sr & MIPS_SR_KU_PREV) 111 #define MIPS1_CLKF_BASEPRI(framep) \ 112 ((~(framep)->sr & (MIPS_INT_MASK | MIPS_SR_INT_ENA_PREV)) == 0) 113 114 /* mips3 versions */ 115 #define MIPS3_CLKF_USERMODE(framep) ((framep)->sr & MIPS_SR_KSU_USER) 116 #define MIPS3_CLKF_BASEPRI(framep) \ 117 ((~(framep)->sr & (MIPS_INT_MASK | MIPS_SR_INT_ENAB)) == 0) 118 119 #define CLKF_PC(framep) ((framep)->pc) 120 #define CLKF_INTR(framep) (0) 121 122 #if defined(MIPS3) && !defined(MIPS1) 123 #define CLKF_USERMODE(framep) MIPS3_CLKF_USERMODE(framep) 124 #define CLKF_BASEPRI(framep) MIPS3_CLKF_BASEPRI(framep) 125 #endif 126 127 #if !defined(MIPS3) && defined(MIPS1) 128 #define CLKF_USERMODE(framep) MIPS1_CLKF_USERMODE(framep) 129 #define CLKF_BASEPRI(framep) MIPS1_CLKF_BASEPRI(framep) 130 #endif 131 132 133 #if defined(MIPS3) && defined(MIPS1) 134 #define CLKF_USERMODE(framep) \ 135 ((CPUISMIPS3) ? MIPS3_CLKF_USERMODE(framep): MIPS1_CLKF_USERMODE(framep)) 136 #define CLKF_BASEPRI(framep) \ 137 ((CPUISMIPS3) ? MIPS3_CLKF_BASEPRI(framep): MIPS1_CLKF_BASEPRI(framep)) 138 #endif 139 140 141 /* 142 * Preempt the current process if in interrupt from user mode, 143 * or after the current trap/syscall if in system mode. 144 */ 145 #define need_resched() { want_resched = 1; aston(); } 146 147 /* 148 * Give a profiling tick to the current process when the user profiling 149 * buffer pages are invalid. On the MIPS, request an ast to send us 150 * through trap, marking the proc as needing a profiling tick. 151 */ 152 #define need_proftick(p) { (p)->p_flag |= P_OWEUPC; aston(); } 153 154 /* 155 * Notify the current process (p) that it has a signal pending, 156 * process as soon as possible. 157 */ 158 #define signotify(p) aston() 159 160 #define aston() (astpending = 1) 161 162 extern int astpending; /* need to trap before returning to user mode */ 163 extern int want_resched; /* resched() was called */ 164 #ifdef MIPS3 165 extern u_int mips_L2CacheSize; 166 extern int mips_L2CacheIsSnooping; /* L2 cache snoops uncached writes ? */ 167 extern int mips_L2CacheMixed; 168 169 #ifdef MIPS3_INTERNAL_TIMER_INTERRUPT 170 extern u_int32_t mips3_intr_cycle_count; 171 extern u_int32_t mips3_timer_delta; 172 #endif 173 #endif /* MIPS3 */ 174 175 /* 176 * Misc prototypes. 177 */ 178 struct proc; 179 struct user; 180 181 /* trap.c */ 182 void child_return __P((void *)); 183 int kdbpeek __P((vaddr_t)); 184 185 /* mips_machdep.c */ 186 void dumpsys __P((void)); 187 int savectx __P((struct user *)); 188 void mips_init_msgbuf __P((void)); 189 190 /* locore.S */ 191 void savefpregs __P((struct proc *)); 192 void switchfpregs __P((struct proc *, struct proc *)); 193 int badaddr __P((void *, size_t)); 194 195 /* mips_machdep.c */ 196 void cpu_identify __P((void)); 197 void mips_vector_init __P((void)); 198 199 #endif /* ! _LOCORE */ 200 #endif /* _KERNEL */ 201 202 #endif /* _CPU_H_ */ 203
Indexes created Tue Sep 23 20:09:58 GMT 2025