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Annotation of lucent/sys/src/9/gnot/mem.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Memory and machine-specific definitions.  Used in C and assembler.
                      3:  */
                      4: 
                      5: /*
                      6:  * Sizes
                      7:  */
                      8: 
                      9: #define        BI2BY           8                       /* bits per byte */
                     10: #define BI2WD          32                      /* bits per word */
                     11: #define        BY2WD           4                       /* bytes per word */
                     12: #define        BY2PG           8192                    /* bytes per page */
                     13: #define        WD2PG           (BY2PG/BY2WD)           /* words per page */
                     14: #define        PGSHIFT         13                      /* log(BY2PG) */
                     15: #define PGROUND(s)     (((s)+(BY2PG-1))&~(BY2PG-1))
                     16: #define ICACHESIZE     0
                     17: #define MB4            (4*1024*1024)           /* Lots of things are 4Mb in size */
                     18: 
                     19: #define        MAXMACH         1                       /* max # cpus system can run */
                     20: 
                     21: /*
                     22:  * Time
                     23:  */
                     24: #define        HZ              (60)                    /* clock frequency */
                     25: #define        MS2HZ           (1000/HZ)               /* millisec per clock tick */
                     26: #define        TK2SEC(t)       ((t)/HZ)                /* ticks to seconds */
                     27: #define        TK2MS(t)        ((((ulong)(t))*1000)/HZ)        /* ticks to milliseconds */
                     28: #define        MS2TK(t)        ((((ulong)(t))*HZ)/1000)        /* milliseconds to ticks */
                     29: 
                     30: /*
                     31:  * SR bits
                     32:  */
                     33: #define SUPER          0x2000
                     34: #define SPL(n)         (n<<8)
                     35: 
                     36: /*
                     37:  * CACR
                     38:  */
                     39: #define        CCLEAR          0x08
                     40: #define        CENABLE         0x01
                     41: 
                     42: /*
                     43:  * Magic registers (unused in current system)
                     44:  */
                     45: 
                     46: #define        MACH            A5              /* A5 is m-> */
                     47: #define        USER            A4              /* A4 is u-> */
                     48: 
                     49: /*
                     50:  * Fundamental addresses
                     51:  */
                     52: 
                     53: #define        USERADDR        0x80000000
                     54: /* assuming we're in a syscall, this is the address of the Ureg structure */
                     55: #define        UREGVARSZ       (23*BY2WD)      /* size of variable part of Ureg */
                     56: #define        UREGADDR        (USERADDR+BY2PG-(UREGVARSZ+2+4+2+(8+8+1+1)*BY2WD))
                     57: 
                     58: /*
                     59:  * Devices poked during bootstrap
                     60:  */
                     61: #define        TACADDR         0x40600000
                     62: #define        MOUSE           0x40200000
                     63: 
                     64: /*
                     65:  * MMU
                     66:  */
                     67: 
                     68: #define        VAMASK  0xCFFFFFFF      /* clear balu bits in address */
                     69: #define        KUSEG   0x00000000
                     70: #define KSEG   0x80000000
                     71: 
                     72: /*
                     73:  * MMU entries
                     74:  */
                     75: #define        PTEVALID        (1<<13)
                     76: #define PTEWRITE       0
                     77: #define        PTERONLY        (1<<14)
                     78: #define        PTEKERNEL       (1<<15)
                     79: #define PTEUNCACHED    0
                     80: #define        INVALIDPTE      0
                     81: #define PTEMAPMEM      (1024*1024)     
                     82: #define        PTEPERTAB       (PTEMAPMEM/BY2PG)
                     83: #define SEGMAPSIZE     16
                     84: 
                     85: #define        PPN(pa)         ((pa>>13)&0x1FFF)
                     86: 
                     87: #define        KMAP    ((unsigned long *)0xD0000000)
                     88: #define        UMAP    ((unsigned long *)0x50000000)
                     89: 
                     90: /*
                     91:  * Virtual addresses
                     92:  */
                     93: #define        VTAG(va)        ((va>>22)&0x03F)
                     94: #define        VPN(va)         ((va>>13)&0x1FF)
                     95: 
                     96: #define        PARAM           ((char*)0x40500000)
                     97: #define        TLBFLUSH_       0x01
                     98: 
                     99: /*
                    100:  * Address spaces
                    101:  */
                    102: 
                    103: #define        UZERO   KUSEG                   /* base of user address space */
                    104: #define        UTZERO  (UZERO+BY2PG)           /* first address in user text */
                    105: #define        TSTKTOP 0x10000000              /* end of new stack in sysexec */
                    106: #define TSTKSIZ 100
                    107: #define        USTKTOP (TSTKTOP-TSTKSIZ*BY2PG) /* byte just beyond user stack */
                    108: #define        KZERO   KSEG                    /* base of kernel address space */
                    109: #define        KTZERO  (KZERO+BY2PG)           /* first address in kernel text */
                    110: #define        USTKSIZE        (4*1024*1024)   /* size of user stack */
                    111: 
                    112: #define        MACHSIZE        4096
                    113: 
                    114: 
                    115: #define isphys(p) ((((ulong)(p))&0xF0000000) == KSEG)

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