1990/03091/gnot/mem.h (diff list | history)

gnot/mem.h on 1990/03091
1990/03091		/* * Memory and machine-specific definitions. Used in C and assembler. */ /* * Sizes */ #define BI2BY 8 /* bits per byte */ #define BI2WD 32 /* bits per word */ #define BY2WD 4 /* bytes per word */ #define BY2PG 8192 /* bytes per page */ #define WD2PG (BY2PG/BY2WD) /* words per page */ #define PGSHIFT 13 /* log(BY2PG) */ #define MS2HZ 16 /* BUG */ /* millisec per clock tick */ #define MAXMACH 1 /* max # cpus system can run */ /* * SR bits */ #define SUPER 0x2000 #define SPL(n) (n<<8) /* * CACR */ #define CCLEAR 0x08 #define CENABLE 0x01 /* * Magic registers */ #define MACH A5 /* A5 is m-> */ #define USER A4 /* A4 is u-> */ /* * Fundamental addresses */ #define USERADDR 0x80000000 #define UREGADDR (USERADDR+BY2PG-(2+4+2+(8+8+1)*BY2WD)) /* * Devices poked during bootstrap */ #define TACADDR 0x40600000 #define MOUSE 0x40200000 /* * MMU */ #define KUSEG 0x00000000 #define KSEG 0x80000000 /* * MMU entries */ #define PTEVALID (1<<13) #define PTERONLY (1<<14) #define PTEKERNEL (1<<15) #define INVALIDPTE 0 #define PPN(pa) ((pa>>13)&0x1FFF) #define KMAP ((unsigned long *)0xD0000000) #define UMAP ((unsigned long *)0x50000000) /* * Virtual addresses */ #define VTAG(va) ((va>>22)&0x03F) #define VPN(va) ((va>>13)&0x1FF) #define PARAM ((char*)0x40500000) #define TLBFLUSH_ 0x01 /* * Address spaces */ #define UZERO KUSEG /* base of user address space */ #define UTZERO (UZERO+BY2PG) /* first address in user text */ #define TSTKTOP 0x10000000 /* end of new stack in sysexec */ #define USTKTOP (TSTKTOP-100*BY2PG) /* byte just beyond user stack */ #define KZERO KSEG /* base of kernel address space */ #define KTZERO (KZERO+BY2PG) /* first address in kernel text */ #define NSEG 5 #define MACHSIZE 4096