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/* $NetBSD: cpu.h,v 1.8 1995/06/28 02:55:39 cgd Exp $ */
/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1982, 1990 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. 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.
*
* from: Utah $Hdr: cpu.h 1.16 91/03/25$
*
* @(#)cpu.h 7.7 (Berkeley) 6/27/91
*/
#ifndef _MACHINE_CPU_H_
#define _MACHINE_CPU_H_
/*
* Exported definitions unique to atari/68k cpu support.
*/
/*
* definitions of cpu-dependent requirements
* referenced in generic code
*/
#define cpu_swapin(p) /* nothing */
#define cpu_wait(p) /* nothing */
#define cpu_setstack(p, ap) (p)->p_md.md_regs[SP] = ap
#define cpu_swapout(p) /* nothing */
/*
* Arguments to hardclock and gatherstats encapsulate the previous
* machine state in an opaque clockframe. On the hp300, we use
* what the hardware pushes on an interrupt (frame format 0).
*/
struct clockframe {
u_short sr; /* sr at time of interrupt */
u_long pc; /* pc at time of interrupt */
u_short vo; /* vector offset (4-word frame) */
};
#define CLKF_USERMODE(framep) (((framep)->sr & PSL_S) == 0)
#define CLKF_BASEPRI(framep) (((framep)->sr & PSL_IPL) == 0)
#define CLKF_PC(framep) ((framep)->pc)
#if 0
/* We would like to do it this way... */
#define CLKF_INTR(framep) (((framep)->sr & PSL_M) == 0)
#else
/* but until we start using PSL_M, we have to do this instead */
#define CLKF_INTR(framep) (0) /* XXX */
#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; setsoftast();}
/*
* Give a profiling tick to the current process from the softclock
* interrupt. On hp300, request an ast to send us through trap(),
* marking the proc as needing a profiling tick.
*/
#define profile_tick(p, framep) ((p)->p_flag |= P_OWEUPC, setsoftast())
#define need_proftick(p) ((p)->p_flag |= P_OWEUPC, setsoftast())
/*
* Notify the current process (p) that it has a signal pending,
* process as soon as possible.
*/
#define signotify(p) setsoftast()
#define setsoftast() (astpending = 1)
extern int astpending; /* need trap before returning to user mode */
extern int want_resched; /* resched() was called */
/* include support for software interrupts */
#include <machine/mtpr.h>
/*
* The rest of this should probably be moved to ../atari/ataricpu.h,
* although some of it could probably be put into generic 68k headers.
*/
#define BASEPRI(sr) ((sr & PSL_IPL) == 0)
/*
* Values for machineid.
*/
#define ATARI_68020 (1L<<2)
#define ATARI_68030 (1L<<3)
#define ATARI_68040 (1L<<4)
#define ATARI_68881 (1L<<8)
#define ATARI_68882 (1L<<9)
#define ATARI_FPU40 (1L<<10)
#define ATARI_TT (1L<<11)
#define ATARI_FALCON (1L<<12)
#define ATARI_CLKBROKEN (1L<<16)
/*
* Values for mmutype (assigned for quick testing)
*/
#define MMU_68030 -1 /* 68030 on-chip subset of 68851 */
#define MMU_68851 1 /* Motorola 68851 */
#define MMU_68040 -2 /* 68040 on-chip subsubset */
#ifdef _KERNEL
extern int machineid, mmutype, cpu040, fputype;
#endif
/*
* 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)
/* 680X0 function codes */
#define FC_USERD 1 /* user data space */
#define FC_USERP 2 /* user program space */
#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 /* enable instruction cache */
#define DC40_ENABLE 0x80000000 /* enable data cache */
#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)
/* 68040 cache control */
#define CACHE40_ON (IC40_ENABLE|DC40_ENABLE)
#define CACHE40_OFF 0x00000000
/*
* CTL_MACHDEP definitions.
*/
#define CPU_CONSDEV 1 /* dev_t: console terminal device */
#define CPU_MAXID 2 /* number of valid machdep ids */
#define CTL_MACHDEP_NAMES { \
{ 0, 0 }, \
{ "console_device", CTLTYPE_STRUCT }, \
}
#endif /* !_MACHINE_CPU_H_ */
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