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cpu.h revision 1.65 
      1 /*	$NetBSD: cpu.h,v 1.65 2011/02/08 20:20:13 rmind Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988 University of Utah.
      5  * Copyright (c) 1982, 1990, 1993
      6  *	The Regents of the University of California.  All rights reserved.
      7  *
      8  * This code is derived from software contributed to Berkeley by
      9  * the Systems Programming Group of the University of Utah Computer
     10  * Science Department.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  * 3. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  * from: Utah $Hdr: cpu.h 1.16 91/03/25$
     37  *
     38  *	@(#)cpu.h	8.4 (Berkeley) 1/5/94
     39  */
     40 
     41 #ifndef _HP300_CPU_H_
     42 #define	_HP300_CPU_H_
     43 
     44 #if defined(_KERNEL)
     45 
     46 #if defined(_KERNEL_OPT)
     47 #include "opt_lockdebug.h"
     48 #endif
     49 
     50 /*
     51  * Exported definitions unique to hp300/68k cpu support.
     52  */
     53 
     54 /*
     55  * Get common m68k CPU definitions.
     56  */
     57 #include <m68k/cpu.h>
     58 #include <machine/hp300spu.h>
     59 
     60 /*
     61  * Get interrupt glue.
     62  */
     63 #include <machine/intr.h>
     64 
     65 /*
     66  * Arguments to hardclock and gatherstats encapsulate the previous
     67  * machine state in an opaque clockframe.  One the hp300, we use
     68  * what the hardware pushes on an interrupt (frame format 0).
     69  */
     70 struct clockframe {
     71 	u_short	sr;		/* sr at time of interrupt */
     72 	u_long	pc;		/* pc at time of interrupt */
     73 	u_short	vo;		/* vector offset (4-word frame) */
     74 };
     75 
     76 #define	CLKF_USERMODE(framep)	(((framep)->sr & PSL_S) == 0)
     77 #define	CLKF_PC(framep)		((framep)->pc)
     78 #if 0
     79 /* We would like to do it this way... */
     80 #define	CLKF_INTR(framep)	(((framep)->sr & PSL_M) == 0)
     81 #else
     82 /* but until we start using PSL_M, we have to do this instead */
     83 #include <machine/intr.h>
     84 #define	CLKF_INTR(framep)	(idepth > 1)	/* XXX */
     85 #endif
     86 
     87 
     88 /*
     89  * Preempt the current process if in interrupt from user mode,
     90  * or after the current trap/syscall if in system mode.
     91  */
     92 #define	cpu_need_resched(ci, flags)	\
     93 	do { ci->ci_want_resched = 1; aston(); } while (/* CONSTCOND */0)
     94 
     95 /*
     96  * Give a profiling tick to the current process when the user profiling
     97  * buffer pages are invalid.  On the hp300, request an ast to send us
     98  * through trap, marking the proc as needing a profiling tick.
     99  */
    100 #define	cpu_need_proftick(l)	\
    101 	do { (l)->l_pflag |= LP_OWEUPC; aston(); } while (/* CONSTCOND */0)
    102 
    103 /*
    104  * Notify the current process (p) that it has a signal pending,
    105  * process as soon as possible.
    106  */
    107 #define	cpu_signotify(l)	aston()
    108 
    109 extern int astpending;		/* need to trap before returning to user mode */
    110 #define aston() (astpending++)
    111 
    112 #endif /* _KERNEL */
    113 
    114 /*
    115  * CTL_MACHDEP definitions.
    116  */
    117 #define	CPU_CONSDEV		1	/* dev_t: console terminal device */
    118 #define	CPU_MAXID		2	/* number of valid machdep ids */
    119 
    120 /*
    121  * The rest of this should probably be moved to <machine/hp300spu.h>,
    122  * although some of it could probably be put into generic 68k headers.
    123  */
    124 
    125 #ifdef _KERNEL
    126 extern	uint8_t *intiobase, *intiolimit, *extiobase;
    127 extern	void (*vectab[])(void);
    128 
    129 struct fpframe;
    130 
    131 /* locore.s functions */
    132 void	m68881_save(struct fpframe *);
    133 void	m68881_restore(struct fpframe *);
    134 int	suline(void *, void *);
    135 void	loadustp(int);
    136 
    137 void	doboot(void) __attribute__((__noreturn__));
    138 void	ecacheon(void);
    139 void	ecacheoff(void);
    140 
    141 /* clock.c functions */
    142 void	hp300_calibrate_delay(void);
    143 
    144 /* machdep.c functions */
    145 int	badaddr(void *);
    146 int	badbaddr(void *);
    147 
    148 /* what is this supposed to do? i.e. how is it different than startrtclock? */
    149 #define	enablertclock()
    150 
    151 #endif
    152 
    153 /* physical memory sections */
    154 #define	ROMBASE		(0x00000000)
    155 #define	INTIOBASE	(0x00400000)
    156 #define	INTIOTOP	(0x00600000)
    157 #define	EXTIOBASE	(0x00600000)
    158 #define	EXTIOTOP	(0x20000000)
    159 #define	MAXADDR		((paddr_t)(0 - NBPG))
    160 
    161 /*
    162  * Internal IO space:
    163  *
    164  * Ranges from 0x400000 to 0x600000 (IIOMAPSIZE).
    165  *
    166  * Internal IO space is mapped in the kernel from ``intiobase'' to
    167  * ``intiolimit'' (defined in locore.s).  Since it is always mapped,
    168  * conversion between physical and kernel virtual addresses is easy.
    169  */
    170 #define	ISIIOVA(va) \
    171 	((uint8_t *)(va) >= intiobase && (uint8_t *)(va) < intiolimit)
    172 #define	IIOV(pa)	((paddr_t)(pa)-INTIOBASE+(vaddr_t)intiobase)
    173 #define	IIOP(va)	((vaddr_t)(va)-(vaddr_t)intiobase+INTIOBASE)
    174 #define	IIOPOFF(pa)	((paddr_t)(pa)-INTIOBASE)
    175 #define	IIOMAPSIZE	btoc(INTIOTOP-INTIOBASE)	/* 2mb */
    176 
    177 /*
    178  * External IO space:
    179  *
    180  * DIO ranges from select codes 0-63 at physical addresses given by:
    181  *	0x600000 + (sc - 32) * 0x10000
    182  * DIO cards are addressed in the range 0-31 [0x600000-0x800000) for
    183  * their control space and the remaining areas, [0x200000-0x400000) and
    184  * [0x800000-0x1000000), are for additional space required by a card;
    185  * e.g. a display framebuffer.
    186  *
    187  * DIO-II ranges from select codes 132-255 at physical addresses given by:
    188  *	0x1000000 + (sc - 132) * 0x400000
    189  * The address range of DIO-II space is thus [0x1000000-0x20000000).
    190  *
    191  * DIO/DIO-II space is too large to map in its entirety, instead devices
    192  * are mapped into kernel virtual address space allocated from a range
    193  * of EIOMAPSIZE pages (vmparam.h) starting at ``extiobase''.
    194  */
    195 #define	DIOBASE		(0x600000)
    196 #define	DIOTOP		(0x1000000)
    197 #define	DIOCSIZE	(0x10000)
    198 #define	DIOIIBASE	(0x01000000)
    199 #define	DIOIITOP	(0x20000000)
    200 #define	DIOIICSIZE	(0x00400000)
    201 
    202 /*
    203  * HP MMU
    204  */
    205 #define	MMUBASE		IIOPOFF(0x5F4000)
    206 #define	MMUSSTP		0x0
    207 #define	MMUUSTP		0x4
    208 #define	MMUTBINVAL	0x8
    209 #define	MMUSTAT		0xC
    210 #define	MMUCMD		MMUSTAT
    211 
    212 #define	MMU_UMEN	0x0001	/* enable user mapping */
    213 #define	MMU_SMEN	0x0002	/* enable supervisor mapping */
    214 #define	MMU_CEN		0x0004	/* enable data cache */
    215 #define	MMU_BERR	0x0008	/* bus error */
    216 #define	MMU_IEN		0x0020	/* enable instruction cache */
    217 #define	MMU_FPE		0x0040	/* enable 68881 FP coprocessor */
    218 #define	MMU_WPF		0x2000	/* write protect fault */
    219 #define	MMU_PF		0x4000	/* page fault */
    220 #define	MMU_PTF		0x8000	/* page table fault */
    221 
    222 #define	MMU_FAULT	(MMU_PTF|MMU_PF|MMU_WPF|MMU_BERR)
    223 #define	MMU_ENAB	(MMU_UMEN|MMU_SMEN|MMU_IEN|MMU_FPE)
    224 
    225 #if defined(CACHE_HAVE_PAC) || defined(CACHE_HAVE_VAC)
    226 #define M68K_CACHEOPS_MACHDEP
    227 #endif
    228 
    229 #ifdef CACHE_HAVE_PAC
    230 #define M68K_CACHEOPS_MACHDEP_PCIA
    231 #endif
    232 
    233 #ifdef CACHE_HAVE_VAC
    234 #define M68K_CACHEOPS_MACHDEP_DCIA
    235 #define M68K_CACHEOPS_MACHDEP_DCIS
    236 #define M68K_CACHEOPS_MACHDEP_DCIU
    237 #define M68K_CACHEOPS_MACHDEP_TBIA
    238 #define M68K_CACHEOPS_MACHDEP_TBIS
    239 #define M68K_CACHEOPS_MACHDEP_TBIAS
    240 #define M68K_CACHEOPS_MACHDEP_TBIAU
    241 #endif
    242 
    243 #endif /* _HP300_CPU_H_ */
    244