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Annotation of Net2/arch/hp300/include/cpu.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1988 University of Utah.
        !             3:  * Copyright (c) 1982, 1990 The Regents of the University of California.
        !             4:  * All rights reserved.
        !             5:  *
        !             6:  * This code is derived from software contributed to Berkeley by
        !             7:  * the Systems Programming Group of the University of Utah Computer
        !             8:  * Science Department.
        !             9:  *
        !            10:  * Redistribution and use in source and binary forms, with or without
        !            11:  * modification, are permitted provided that the following conditions
        !            12:  * are met:
        !            13:  * 1. Redistributions of source code must retain the above copyright
        !            14:  *    notice, this list of conditions and the following disclaimer.
        !            15:  * 2. Redistributions in binary form must reproduce the above copyright
        !            16:  *    notice, this list of conditions and the following disclaimer in the
        !            17:  *    documentation and/or other materials provided with the distribution.
        !            18:  * 3. All advertising materials mentioning features or use of this software
        !            19:  *    must display the following acknowledgement:
        !            20:  *     This product includes software developed by the University of
        !            21:  *     California, Berkeley and its contributors.
        !            22:  * 4. Neither the name of the University nor the names of its contributors
        !            23:  *    may be used to endorse or promote products derived from this software
        !            24:  *    without specific prior written permission.
        !            25:  *
        !            26:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            27:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            28:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            29:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            30:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            31:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            32:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            33:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            34:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            35:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            36:  * SUCH DAMAGE.
        !            37:  *
        !            38:  * from: Utah $Hdr: cpu.h 1.16 91/03/25$
        !            39:  *
        !            40:  *     @(#)cpu.h       7.7 (Berkeley) 6/27/91
        !            41:  */
        !            42: 
        !            43: /*
        !            44:  * Exported definitions unique to hp300/68k cpu support.
        !            45:  */
        !            46: 
        !            47: /*
        !            48:  * definitions of cpu-dependent requirements
        !            49:  * referenced in generic code
        !            50:  */
        !            51: #define        COPY_SIGCODE            /* copy sigcode above user stack in exec */
        !            52: 
        !            53: /*
        !            54:  * function vs. inline configuration;
        !            55:  * these are defined to get generic functions
        !            56:  * rather than inline or machine-dependent implementations
        !            57:  */
        !            58: #define        NEED_MINMAX             /* need {,i,l,ul}{min,max} functions */
        !            59: #undef NEED_FFS                /* don't need ffs function */
        !            60: #undef NEED_BCMP               /* don't need bcmp function */
        !            61: #undef NEED_STRLEN             /* don't need strlen function */
        !            62: 
        !            63: #define        cpu_exec(p)     /* nothing */
        !            64: #define        cpu_wait(p)     /* nothing */
        !            65: 
        !            66: /*
        !            67:  * Arguments to hardclock, softclock and gatherstats
        !            68:  * encapsulate the previous machine state in an opaque
        !            69:  * clockframe; for hp300, use just what the hardware
        !            70:  * leaves on the stack.
        !            71:  */
        !            72: typedef struct intrframe {
        !            73:        int     pc;
        !            74:        int     ps;
        !            75: } clockframe;
        !            76: 
        !            77: #define        CLKF_USERMODE(framep)   (((framep)->ps & PSL_S) == 0)
        !            78: #define        CLKF_BASEPRI(framep)    (((framep)->ps & PSL_IPL7) == 0)
        !            79: #define        CLKF_PC(framep)         ((framep)->pc)
        !            80: 
        !            81: 
        !            82: /*
        !            83:  * Preempt the current process if in interrupt from user mode,
        !            84:  * or after the current trap/syscall if in system mode.
        !            85:  */
        !            86: #define        need_resched()  { want_resched++; aston(); }
        !            87: 
        !            88: /*
        !            89:  * Give a profiling tick to the current process from the softclock
        !            90:  * interrupt.  On hp300, request an ast to send us through trap(),
        !            91:  * marking the proc as needing a profiling tick.
        !            92:  */
        !            93: #define        profile_tick(p, framep) { (p)->p_flag |= SOWEUPC; aston(); }
        !            94: 
        !            95: /*
        !            96:  * Notify the current process (p) that it has a signal pending,
        !            97:  * process as soon as possible.
        !            98:  */
        !            99: #define        signotify(p)    aston()
        !           100: 
        !           101: #define aston() (astpending++)
        !           102: 
        !           103: int    astpending;             /* need to trap before returning to user mode */
        !           104: int    want_resched;           /* resched() was called */
        !           105: 
        !           106: 
        !           107: /*
        !           108:  * simulated software interrupt register
        !           109:  */
        !           110: extern unsigned char ssir;
        !           111: 
        !           112: #define SIR_NET                0x1
        !           113: #define SIR_CLOCK      0x2
        !           114: 
        !           115: #define siroff(x)      ssir &= ~(x)
        !           116: #define setsoftnet()   ssir |= SIR_NET
        !           117: #define setsoftclock() ssir |= SIR_CLOCK
        !           118: 
        !           119: 
        !           120: 
        !           121: /*
        !           122:  * The rest of this should probably be moved to ../hp300/hp300cpu.h,
        !           123:  * although some of it could probably be put into generic 68k headers.
        !           124:  */
        !           125: 
        !           126: /* values for machineid */
        !           127: #define        HP_320          0       /* 16Mhz 68020+HP MMU+16K external cache */
        !           128: #define        HP_330          1       /* 16Mhz 68020+68851 MMU */
        !           129: #define        HP_350          2       /* 25Mhz 68020+HP MMU+32K external cache */
        !           130: #define        HP_360          3       /* 25Mhz 68030 */
        !           131: #define        HP_370          4       /* 33Mhz 68030+64K external cache */
        !           132: #define        HP_340          5       /* 16Mhz 68030 */
        !           133: #define        HP_375          6       /* 50Mhz 68030+32K external cache */
        !           134: 
        !           135: /* values for mmutype (assigned for quick testing) */
        !           136: #define        MMU_68030       -1      /* 68030 on-chip subset of 68851 */
        !           137: #define        MMU_HP          0       /* HP proprietary */
        !           138: #define        MMU_68851       1       /* Motorola 68851 */
        !           139: 
        !           140: /* values for ectype */
        !           141: #define        EC_PHYS         -1      /* external physical address cache */
        !           142: #define        EC_NONE         0       /* no external cache */
        !           143: #define        EC_VIRT         1       /* external virtual address cache */
        !           144: 
        !           145: /* values for cpuspeed (not really related to clock speed due to caches) */
        !           146: #define        MHZ_8           1
        !           147: #define        MHZ_16          2
        !           148: #define        MHZ_25          3
        !           149: #define        MHZ_33          4
        !           150: #define        MHZ_50          6
        !           151: 
        !           152: #ifdef KERNEL
        !           153: extern int machineid, mmutype, ectype;
        !           154: extern char *intiobase, *intiolimit;
        !           155: 
        !           156: /* what is this supposed to do? i.e. how is it different than startrtclock? */
        !           157: #define        enablertclock()
        !           158: 
        !           159: #endif
        !           160: 
        !           161: /* physical memory sections */
        !           162: #define        ROMBASE         (0x00000000)
        !           163: #define        INTIOBASE       (0x00400000)
        !           164: #define        INTIOTOP        (0x00600000)
        !           165: #define        EXTIOBASE       (0x00600000)
        !           166: #define        EXTIOTOP        (0x20000000)
        !           167: #define        MAXADDR         (0xFFFFF000)
        !           168: 
        !           169: /*
        !           170:  * Internal IO space:
        !           171:  *
        !           172:  * Ranges from 0x400000 to 0x600000 (IIOMAPSIZE).
        !           173:  *
        !           174:  * Internal IO space is mapped in the kernel from ``intiobase'' to
        !           175:  * ``intiolimit'' (defined in locore.s).  Since it is always mapped,
        !           176:  * conversion between physical and kernel virtual addresses is easy.
        !           177:  */
        !           178: #define        ISIIOVA(va) \
        !           179:        ((char *)(va) >= intiobase && (char *)(va) < intiolimit)
        !           180: #define        IIOV(pa)        ((int)(pa)-INTIOBASE+(int)intiobase)
        !           181: #define        IIOP(va)        ((int)(va)-(int)intiobase+INTIOBASE)
        !           182: #define        IIOPOFF(pa)     ((int)(pa)-INTIOBASE)
        !           183: #define        IIOMAPSIZE      btoc(INTIOTOP-INTIOBASE)        /* 2mb */
        !           184: 
        !           185: /*
        !           186:  * External IO space:
        !           187:  *
        !           188:  * DIO ranges from select codes 0-63 at physical addresses given by:
        !           189:  *     0x600000 + (sc - 32) * 0x10000
        !           190:  * DIO cards are addressed in the range 0-31 [0x600000-0x800000) for
        !           191:  * their control space and the remaining areas, [0x200000-0x400000) and
        !           192:  * [0x800000-0x1000000), are for additional space required by a card;
        !           193:  * e.g. a display framebuffer.
        !           194:  *
        !           195:  * DIO-II ranges from select codes 132-255 at physical addresses given by:
        !           196:  *     0x1000000 + (sc - 132) * 0x400000
        !           197:  * The address range of DIO-II space is thus [0x1000000-0x20000000).
        !           198:  *
        !           199:  * DIO/DIO-II space is too large to map in its entirety, instead devices
        !           200:  * are mapped into kernel virtual address space allocated from a range
        !           201:  * of EIOMAPSIZE pages (vmparam.h) starting at ``extiobase''.
        !           202:  */
        !           203: #define        DIOBASE         (0x600000)
        !           204: #define        DIOTOP          (0x1000000)
        !           205: #define        DIOCSIZE        (0x10000)
        !           206: #define        DIOIIBASE       (0x01000000)
        !           207: #define        DIOIITOP        (0x20000000)
        !           208: #define        DIOIICSIZE      (0x00400000)
        !           209: 
        !           210: /*
        !           211:  * HP MMU
        !           212:  */
        !           213: #define        MMUBASE         IIOPOFF(0x5F4000)
        !           214: #define        MMUSSTP         0x0
        !           215: #define        MMUUSTP         0x4
        !           216: #define        MMUTBINVAL      0x8
        !           217: #define        MMUSTAT         0xC
        !           218: #define        MMUCMD          MMUSTAT
        !           219: 
        !           220: #define        MMU_UMEN        0x0001  /* enable user mapping */
        !           221: #define        MMU_SMEN        0x0002  /* enable supervisor mapping */
        !           222: #define        MMU_CEN         0x0004  /* enable data cache */
        !           223: #define        MMU_BERR        0x0008  /* bus error */
        !           224: #define        MMU_IEN         0x0020  /* enable instruction cache */
        !           225: #define        MMU_FPE         0x0040  /* enable 68881 FP coprocessor */
        !           226: #define        MMU_WPF         0x2000  /* write protect fault */
        !           227: #define        MMU_PF          0x4000  /* page fault */
        !           228: #define        MMU_PTF         0x8000  /* page table fault */
        !           229: 
        !           230: #define        MMU_FAULT       (MMU_PTF|MMU_PF|MMU_WPF|MMU_BERR)
        !           231: #define        MMU_ENAB        (MMU_UMEN|MMU_SMEN|MMU_IEN|MMU_FPE)
        !           232: 
        !           233: /*
        !           234:  * 68851 and 68030 MMU
        !           235:  */
        !           236: #define        PMMU_LVLMASK    0x0007
        !           237: #define        PMMU_INV        0x0400
        !           238: #define        PMMU_WP         0x0800
        !           239: #define        PMMU_ALV        0x1000
        !           240: #define        PMMU_SO         0x2000
        !           241: #define        PMMU_LV         0x4000
        !           242: #define        PMMU_BE         0x8000
        !           243: #define        PMMU_FAULT      (PMMU_WP|PMMU_INV)
        !           244: 
        !           245: /* 680X0 function codes */
        !           246: #define        FC_USERD        1       /* user data space */
        !           247: #define        FC_USERP        2       /* user program space */
        !           248: #define        FC_PURGE        3       /* HPMMU: clear TLB entries */
        !           249: #define        FC_SUPERD       5       /* supervisor data space */
        !           250: #define        FC_SUPERP       6       /* supervisor program space */
        !           251: #define        FC_CPU          7       /* CPU space */
        !           252: 
        !           253: /* fields in the 68020 cache control register */
        !           254: #define        IC_ENABLE       0x0001  /* enable instruction cache */
        !           255: #define        IC_FREEZE       0x0002  /* freeze instruction cache */
        !           256: #define        IC_CE           0x0004  /* clear instruction cache entry */
        !           257: #define        IC_CLR          0x0008  /* clear entire instruction cache */
        !           258: 
        !           259: /* additional fields in the 68030 cache control register */
        !           260: #define        IC_BE           0x0010  /* instruction burst enable */
        !           261: #define        DC_ENABLE       0x0100  /* data cache enable */
        !           262: #define        DC_FREEZE       0x0200  /* data cache freeze */
        !           263: #define        DC_CE           0x0400  /* clear data cache entry */
        !           264: #define        DC_CLR          0x0800  /* clear entire data cache */
        !           265: #define        DC_BE           0x1000  /* data burst enable */
        !           266: #define        DC_WA           0x2000  /* write allocate */
        !           267: 
        !           268: #define        CACHE_ON        (DC_WA|DC_BE|DC_CLR|DC_ENABLE|IC_BE|IC_CLR|IC_ENABLE)
        !           269: #define        CACHE_OFF       (DC_CLR|IC_CLR)
        !           270: #define        CACHE_CLR       (CACHE_ON)
        !           271: #define        IC_CLEAR        (DC_WA|DC_BE|DC_ENABLE|IC_BE|IC_CLR|IC_ENABLE)
        !           272: #define        DC_CLEAR        (DC_WA|DC_BE|DC_CLR|DC_ENABLE|IC_BE|IC_ENABLE)

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