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/* $OpenBSD: cpu.h,v 1.22 2008/10/15 23:23:48 deraadt Exp $ */
/* $NetBSD: cpu.h,v 1.3 1997/02/02 06:56:57 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 <machine/cpu.h> to enable conditional code:
*
* M68K_MMU_MOTOROLA Machine may have a Motorola MMU (incl.
* 68851, 68030, 68040, 68060)
*
* M68K_MMU_HP Machine may have 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).
*/
#ifdef _KERNEL
#ifndef _LOCORE
#include <sys/queue.h>
#include <sys/sched.h>
struct cpu_info {
struct proc *ci_curproc;
struct schedstate_percpu ci_schedstate;
u_int32_t ci_randseed;
};
extern struct cpu_info cpu_info_store;
#define curcpu() (&cpu_info_store)
#define CPU_IS_PRIMARY(ci) 1
#define CPU_INFO_ITERATOR int
#define CPU_INFO_FOREACH(cii, ci) \
for (cii = 0, ci = curcpu(); ci != NULL; ci = NULL)
#define CPU_INFO_UNIT(ci) 0
#define MAXCPUS 1
#define cpu_unidle(ci)
#define cpu_number() 0
/*
* All m68k ports must provide these globals.
*/
extern int cputype; /* CPU on this host */
extern int ectype; /* external cache on this host */
extern int fputype; /* FPU on this host */
extern int mmutype; /* MMU on this host */
#endif /* !_LOCORE */
#endif /* _KERNEL */
/* values for cputype */
#define CPU_68020 0 /* 68020 */
#define CPU_68030 1 /* 68030 */
#define CPU_68040 2 /* 68040 */
#define CPU_68060 3 /* 68060 */
/* values for ectype */
#define EC_PHYS -1 /* external physical address cache */
#define EC_NONE 0 /* no external cache */
#define EC_VIRT 1 /* external virtual address cache */
/* values for fputype */
#define FPU_NONE 0 /* no FPU */
#define FPU_68881 1 /* 68881 FPU */
#define FPU_68882 2 /* 68882 FPU */
#define FPU_68040 3 /* 68040 on-chip FPU */
#define FPU_68060 4 /* 68060 on-chip FPU */
#define FPU_UNKNOWN 5 /* placeholder; unknown FPU */
/* values for mmutype (assigned for quick testing) */
#define MMU_68060 -3 /* 68060 on-chip MMU */
#define MMU_68040 -2 /* 68040 on-chip MMU */
#define MMU_68030 -1 /* 68030 on-chip subset of 68851 */
#define MMU_HP 0 /* HP proprietary */
#define MMU_68851 1 /* Motorola 68851 */
#define MMU_SUN 2 /* Sun MMU */
/*
* 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)
/*
* 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
/* 680X0 function codes */
#define FC_USERD 1 /* user data space */
#define FC_USERP 2 /* user program space */
#define FC_PURGE 3 /* HPMMU: clear TLB entries */
#define FC_SUPERD 5 /* supervisor data space */
#define FC_SUPERP 6 /* supervisor program space */
#define FC_CPU 7 /* CPU space */
/* 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)
/* bits in the 68060 Processor Control Register */
#define PCR_IDSHIFT 16
#define PCR_IDMASK 0xffff
#define PCR_68060 0x430
#define PCR_68060LC 0x431
#define PCR_REVSHIFT 8
#define PCR_REVMASK 0xff
#define PCR_DEBUG 0x80
#define PCR_FPUDIS 0x02
#define PCR_SUPERSCALAR 0x01
#ifdef _KERNEL
struct frame;
struct fpframe;
struct pcb;
struct proc;
struct trapframe;
void copypage(void *fromaddr, void *toaddr);
void zeropage(void *addr);
/* locore.s */
void TBIS(vaddr_t);
void TBIAS(void);
void TBIAU(void);
void ICIA(void);
void DCIA(void);
void DCIS(void);
void DCIU(void);
#if defined(M68040) || defined(M68060)
void ICPA(void);
void DCFA(void);
void ICPL(paddr_t);
void ICPP(paddr_t);
void DCPL(paddr_t);
void DCPP(paddr_t);
void DCFL(paddr_t);
void DCFP(paddr_t);
#endif
u_long getdfc(void);
u_long getsfc(void);
void loadustp(int);
void m68881_restore(struct fpframe *);
void m68881_save(struct fpframe *);
void proc_trampoline(void);
void savectx(struct pcb *);
int suline(caddr_t, caddr_t);
void switch_exit(struct proc *);
/* m68k_machdep.c */
void userret(struct proc *);
/* regdump.c */
void regdump(struct trapframe *, int);
/* sys_machdep.c */
int cachectl(struct proc *, int, vaddr_t, int);
#define CC_PURGE 0x00000001
#define CC_FLUSH 0x00000002
#define CC_IPURGE 0x00000004
#define CC_EXTPURGE 0x80000000
/*
* This is used during profiling to integrate system time.
*/
#define PROC_PC(p) (((struct trapframe *)((p)->p_md.md_regs))->tf_pc)
#define cpu_idle_enter() do { /* nothing */ } while (0)
#define cpu_idle_leave() do { /* nothing */ } while (0)
#endif /* _KERNEL */
#endif /* _M68K_CPU_H_ */
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