cpu.h revision 1.36
1 /* $NetBSD: cpu.h,v 1.36 2000/03/24 23:06:04 soren 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 64 #ifdef _KERNEL 65 #ifndef _LOCORE 66 67 /* 68 * Macros to find the CPU architecture we're on at run-time, 69 * or if possible, at compile-time. 70 */ 71 72 #if (MIPS1 + MIPS3) == 1 73 #ifdef MIPS1 74 # define CPUISMIPS3 0 75 #endif /* mips1 */ 76 77 #ifdef MIPS3 78 # define CPUISMIPS3 1 79 #endif /* mips1 */ 80 81 #else /* run-time test */ 82 extern int cpu_arch; 83 #define CPUISMIPS3 (cpu_arch == 3) 84 #endif /* run-time test */ 85 86 /* 87 * definitions of cpu-dependent requirements 88 * referenced in generic code 89 */ 90 #define cpu_wait(p) /* nothing */ 91 #define cpu_swapout(p) panic("cpu_swapout: can't get here"); 92 #define cpu_number() 0 93 94 /* 95 * Arguments to hardclock and gatherstats encapsulate the previous 96 * machine state in an opaque clockframe. 97 */ 98 struct clockframe { 99 int pc; /* program counter at time of interrupt */ 100 int sr; /* status register at time of interrupt */ 101 }; 102 103 /* 104 * A port must provde CLKF_USERMODE() and CLKF_BASEPRI() for use 105 * in machine-independent code. These differ on r4000 and r3000 systems; 106 * provide them in the port-dependent file that includes this one, using 107 * the macros below. 108 */ 109 110 /* mips1 versions */ 111 #define MIPS1_CLKF_USERMODE(framep) ((framep)->sr & MIPS_SR_KU_PREV) 112 #define MIPS1_CLKF_BASEPRI(framep) \ 113 ((~(framep)->sr & (MIPS_INT_MASK | MIPS_SR_INT_ENA_PREV)) == 0) 114 115 /* mips3 versions */ 116 #define MIPS3_CLKF_USERMODE(framep) ((framep)->sr & MIPS_SR_KSU_USER) 117 #define MIPS3_CLKF_BASEPRI(framep) \ 118 ((~(framep)->sr & (MIPS_INT_MASK | MIPS_SR_INT_IE)) == 0) 119 120 #define CLKF_PC(framep) ((framep)->pc) 121 #define CLKF_INTR(framep) (0) 122 123 #if defined(MIPS3) && !defined(MIPS1) 124 #define CLKF_USERMODE(framep) MIPS3_CLKF_USERMODE(framep) 125 #define CLKF_BASEPRI(framep) MIPS3_CLKF_BASEPRI(framep) 126 #endif 127 128 #if !defined(MIPS3) && defined(MIPS1) 129 #define CLKF_USERMODE(framep) MIPS1_CLKF_USERMODE(framep) 130 #define CLKF_BASEPRI(framep) MIPS1_CLKF_BASEPRI(framep) 131 #endif 132 133 134 #if defined(MIPS3) && defined(MIPS1) 135 #define CLKF_USERMODE(framep) \ 136 ((CPUISMIPS3) ? MIPS3_CLKF_USERMODE(framep): MIPS1_CLKF_USERMODE(framep)) 137 #define CLKF_BASEPRI(framep) \ 138 ((CPUISMIPS3) ? MIPS3_CLKF_BASEPRI(framep): MIPS1_CLKF_BASEPRI(framep)) 139 #endif 140 141 142 /* 143 * Preempt the current process if in interrupt from user mode, 144 * or after the current trap/syscall if in system mode. 145 */ 146 #define need_resched() { want_resched = 1; aston(); } 147 148 /* 149 * Give a profiling tick to the current process when the user profiling 150 * buffer pages are invalid. On the MIPS, request an ast to send us 151 * through trap, marking the proc as needing a profiling tick. 152 */ 153 #define need_proftick(p) { (p)->p_flag |= P_OWEUPC; aston(); } 154 155 /* 156 * Notify the current process (p) that it has a signal pending, 157 * process as soon as possible. 158 */ 159 #define signotify(p) aston() 160 161 #define aston() (astpending = 1) 162 163 extern int astpending; /* need to trap before returning to user mode */ 164 extern int want_resched; /* resched() was called */ 165 #ifdef MIPS3 166 extern u_int mips_L2CacheSize; 167 extern int mips_L2CacheIsSnooping; /* L2 cache snoops uncached writes ? */ 168 extern int mips_L2CacheMixed; 169 170 #ifdef MIPS3_INTERNAL_TIMER_INTERRUPT 171 extern u_int32_t mips3_intr_cycle_count; 172 extern u_int32_t mips3_timer_delta; 173 #endif 174 #endif /* MIPS3 */ 175 176 /* 177 * Misc prototypes. 178 */ 179 struct proc; 180 struct user; 181 182 /* trap.c */ 183 void child_return __P((void *)); 184 int kdbpeek __P((vaddr_t)); 185 186 /* mips_machdep.c */ 187 void dumpsys __P((void)); 188 int savectx __P((struct user *)); 189 void mips_init_msgbuf __P((void)); 190 191 /* locore.S */ 192 void savefpregs __P((struct proc *)); 193 void switchfpregs __P((struct proc *, struct proc *)); 194 int badaddr __P((void *, size_t)); 195 196 /* mips_machdep.c */ 197 void cpu_identify __P((void)); 198 void mips_vector_init __P((void)); 199 200 #endif /* ! _LOCORE */ 201 #endif /* _KERNEL */ 202 203 #endif /* _CPU_H_ */ 204
Indexes created Tue Sep 23 07:09:52 GMT 2025