/* $NetBSD: cpu.h,v 1.18 2023/12/27 17:35:35 thorpej Exp $ */ /* * Copyright (c) 1988 University of Utah. * Copyright (c) 1982, 1990, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * the Systems Programming Group of the University of Utah Computer * Science Department. * * 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. 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. * * from: Utah $Hdr: cpu.h 1.16 91/03/25$ * * @(#)cpu.h 8.4 (Berkeley) 1/5/94 */ #ifndef _M68K_CPU_H_ #define _M68K_CPU_H_ /* * Exported definitions common to Motorola m68k-based ports. * * Note that are some port-specific definitions here, such as * HP and Sun MMU types. These facilitate adding very small * amounts of port-specific code to what would otherwise be * identical. The is especially true in the case of the HP * and other m68k pmaps. * * Individual ports are expected to define the following CPP symbols * in to enable conditional code: * * M68K_MMU_MOTOROLA Machine has a Motorola MMU (incl. * 68851, 68030, 68040, 68060) * * M68K_MMU_HP Machine has an HP MMU. * * Note also that while m68k-generic code conditionalizes on the * M68K_MMU_HP CPP symbol, none of the HP MMU definitions are in this * file (since none are used in otherwise sharable code). */ /* * XXX The remaining contents of this file should be split out * XXX into separate files (like m68k.h) and then this file * XXX should go away. Furthermore, most of the stuff defined * XXX here does NOT belong in , and the ports * XXX using this file should remove from there. */ #include /* XXX - Move this stuff into maybe? */ /* * 68851 and 68030 MMU */ #define PMMU_LVLMASK 0x0007 #define PMMU_INV 0x0400 #define PMMU_WP 0x0800 #define PMMU_ALV 0x1000 #define PMMU_SO 0x2000 #define PMMU_LV 0x4000 #define PMMU_BE 0x8000 #define PMMU_FAULT (PMMU_WP|PMMU_INV) /* XXX - Move this stuff into maybe? */ /* * 68040 MMU */ #define MMU40_RES 0x001 #define MMU40_TTR 0x002 #define MMU40_WP 0x004 #define MMU40_MOD 0x010 #define MMU40_CMMASK 0x060 #define MMU40_SUP 0x080 #define MMU40_U0 0x100 #define MMU40_U1 0x200 #define MMU40_GLB 0x400 #define MMU40_BE 0x800 /* XXX - Move this stuff into maybe? */ /* fields in the 68020 cache control register */ #define IC_ENABLE 0x0001 /* enable instruction cache */ #define IC_FREEZE 0x0002 /* freeze instruction cache */ #define IC_CE 0x0004 /* clear instruction cache entry */ #define IC_CLR 0x0008 /* clear entire instruction cache */ /* additional fields in the 68030 cache control register */ #define IC_BE 0x0010 /* instruction burst enable */ #define DC_ENABLE 0x0100 /* data cache enable */ #define DC_FREEZE 0x0200 /* data cache freeze */ #define DC_CE 0x0400 /* clear data cache entry */ #define DC_CLR 0x0800 /* clear entire data cache */ #define DC_BE 0x1000 /* data burst enable */ #define DC_WA 0x2000 /* write allocate */ /* fields in the 68040 cache control register */ #define IC40_ENABLE 0x00008000 /* instruction cache enable bit */ #define DC40_ENABLE 0x80000000 /* data cache enable bit */ /* additional fields in the 68060 cache control register */ #define DC60_NAD 0x40000000 /* no allocate mode, data cache */ #define DC60_ESB 0x20000000 /* enable store buffer */ #define DC60_DPI 0x10000000 /* disable CPUSH invalidation */ #define DC60_FOC 0x08000000 /* four kB data cache mode (else 8) */ #define IC60_EBC 0x00800000 /* enable branch cache */ #define IC60_CABC 0x00400000 /* clear all branch cache entries */ #define IC60_CUBC 0x00200000 /* clear user branch cache entries */ #define IC60_NAI 0x00004000 /* no allocate mode, instr. cache */ #define IC60_FIC 0x00002000 /* four kB instr. cache (else 8) */ #define CACHE_ON (DC_WA|DC_BE|DC_CLR|DC_ENABLE|IC_BE|IC_CLR|IC_ENABLE) #define CACHE_OFF (DC_CLR|IC_CLR) #define CACHE_CLR (CACHE_ON) #define IC_CLEAR (DC_WA|DC_BE|DC_ENABLE|IC_BE|IC_CLR|IC_ENABLE) #define DC_CLEAR (DC_WA|DC_BE|DC_CLR|DC_ENABLE|IC_BE|IC_ENABLE) #define CACHE40_ON (IC40_ENABLE|DC40_ENABLE) #define CACHE40_OFF (0x00000000) #define CACHE60_ON (CACHE40_ON|IC60_CABC|IC60_EBC|DC60_ESB) #define CACHE60_OFF (CACHE40_OFF|IC60_CABC) #define CACHELINE_SIZE 16 #define CACHELINE_MASK (CACHELINE_SIZE - 1) /* CTL_MACHDEP definitions. (Common to all m68k ports.) */ #define CPU_CONSDEV 1 /* dev_t: console terminal device */ #define CPU_ROOT_DEVICE 2 /* string: root device name */ #define CPU_BOOTED_KERNEL 3 /* string: booted kernel name */ #if defined(_KERNEL) || defined(_KMEMUSER) #include struct cpu_info { struct cpu_data ci_data; /* MI per-cpu data */ cpuid_t ci_cpuid; int ci_mtx_count; int ci_mtx_oldspl; volatile int ci_want_resched; volatile int ci_idepth; struct lwp *ci_onproc; /* current user LWP / kthread */ }; #endif /* _KERNEL || _KMEMUSER */ #ifdef _KERNEL extern struct cpu_info cpu_info_store; struct proc; void cpu_proc_fork(struct proc *, struct proc *); #define curcpu() (&cpu_info_store) /* * definitions of cpu-dependent requirements * referenced in generic code */ #define cpu_number() 0 #define LWP_PC(l) (((struct trapframe *)((l)->l_md.md_regs))->tf_pc) #endif /* _KERNEL */ #endif /* _M68K_CPU_H_ */