/* $NetBSD: cpu.h,v 1.29 1999/03/23 22:04:01 simonb Exp $ */ /*- * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Ralph Campbell and Rick Macklem. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)cpu.h 8.4 (Berkeley) 1/4/94 */ #ifndef _CPU_H_ #define _CPU_H_ /* * Exported definitions unique to NetBSD/mips cpu support. */ /* * Macros to find the CPU architecture we're on at run-time, * or if possible, at compile-time. */ #if (MIPS1 + MIPS3) == 1 #ifdef MIPS1 # define CPUISMIPS3 0 #endif /* mips1 */ #ifdef MIPS3 # define CPUISMIPS3 1 #endif /* mips1 */ #else /* run-time test */ extern int cpu_arch; #define CPUISMIPS3 (cpu_arch == 3) #endif /* run-time test */ /* * definitions of cpu-dependent requirements * referenced in generic code */ #define cpu_wait(p) /* nothing */ #define cpu_swapout(p) panic("cpu_swapout: can't get here"); /* * Arguments to hardclock and gatherstats encapsulate the previous * machine state in an opaque clockframe. */ struct clockframe { int pc; /* program counter at time of interrupt */ int sr; /* status register at time of interrupt */ }; /* * A port must provde CLKF_USERMODE() and CLKF_BASEPRI() for use * in machine-independent code. These differ on r4000 and r3000 systems; * provide them in the port-dependent file that includes this one, using * the macros below. */ /* mips1 versions */ #define MIPS1_CLKF_USERMODE(framep) ((framep)->sr & MIPS_SR_KU_PREV) #define MIPS1_CLKF_BASEPRI(framep) \ ((~(framep)->sr & (MIPS_INT_MASK | MIPS_SR_INT_ENA_PREV)) == 0) /* mips3 versions */ #define MIPS3_CLKF_USERMODE(framep) ((framep)->sr & MIPS_SR_KSU_USER) #define MIPS3_CLKF_BASEPRI(framep) \ ((~(framep)->sr & (MIPS_INT_MASK | MIPS_SR_INT_ENAB)) == 0) #define CLKF_PC(framep) ((framep)->pc) #define CLKF_INTR(framep) (0) #if defined(MIPS3) && !defined(MIPS1) #define CLKF_USERMODE(framep) MIPS3_CLKF_USERMODE(framep) #define CLKF_BASEPRI(framep) MIPS3_CLKF_BASEPRI(framep) #endif #if !defined(MIPS3) && defined(MIPS1) #define CLKF_USERMODE(framep) MIPS1_CLKF_USERMODE(framep) #define CLKF_BASEPRI(framep) MIPS1_CLKF_BASEPRI(framep) #endif #if defined(MIPS3) && defined(MIPS1) #define CLKF_USERMODE(framep) \ ((CPUISMIPS3) ? MIPS3_CLKF_USERMODE(framep): MIPS1_CLKF_USERMODE(framep)) #define CLKF_BASEPRI(framep) \ ((CPUISMIPS3) ? MIPS3_CLKF_BASEPRI(framep): MIPS1_CLKF_BASEPRI(framep)) #endif /* * Preempt the current process if in interrupt from user mode, * or after the current trap/syscall if in system mode. */ #define need_resched() { want_resched = 1; aston(); } /* * Give a profiling tick to the current process when the user profiling * buffer pages are invalid. On the MIPS, request an ast to send us * through trap, marking the proc as needing a profiling tick. */ #define need_proftick(p) { (p)->p_flag |= P_OWEUPC; aston(); } /* * Notify the current process (p) that it has a signal pending, * process as soon as possible. */ #define signotify(p) aston() #define aston() (astpending = 1) extern int astpending; /* need to trap before returning to user mode */ extern int want_resched; /* resched() was called */ #ifdef MIPS3 extern u_int mips_L2CacheSize; extern int mips_L2CacheIsSnooping; /* L2 cache snoops uncached writes ? */ extern int mips_L2CacheMixed; #ifdef MIPS3_INTERNAL_TIMER_INTERRUPT extern u_int32_t mips3_intr_cycle_count; extern u_int32_t mips3_timer_delta; #endif #endif /* * CTL_MACHDEP definitions. */ #define CPU_CONSDEV 1 /* dev_t: console terminal device */ #define CPU_BOOTED_KERNEL 2 /* string: booted kernel name */ #define CPU_MAXID 3 /* number of valid machdep ids */ #define CTL_MACHDEP_NAMES { \ { 0, 0 }, \ { "console_device", CTLTYPE_STRUCT }, \ { "booted_kernel", CTLTYPE_STRING }, \ } #ifdef _KERNEL /* * Misc prototypes. */ struct proc; struct user; /* trap.c */ void child_return __P((void *)); int kdbpeek __P((vaddr_t)); /* mips_machdep.c */ caddr_t allocsys __P((caddr_t)); void dumpsys __P((void)); int savectx __P((struct user *)); void mips_init_msgbuf __P((void)); void mips_init_proc0 __P((caddr_t)); /* locore.S */ void savefpregs __P((struct proc *)); void switchfpregs __P((struct proc *, struct proc *)); int badaddr __P((void *, size_t)); /* mips_machdep.c */ void cpu_identify __P((void)); void mips_vector_init __P((void)); #endif /* _KERNEL */ #endif /* _CPU_H_ */