1991/0523/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 MAXMACH 1 /* max # cpus system can run */
1990/06111		/* * Time */
1990/08101		#define HZ (60) /* clock frequency */ #define MS2HZ (1000/HZ) /* millisec per clock tick */ #define TK2SEC(t) ((t)/HZ) /* ticks to seconds */
1990/1012		#define TK2MS(t) ((((ulong)(t))*1000)/HZ) /* ticks to milliseconds */ #define MS2TK(t) ((((ulong)(t))*HZ)/1000) /* milliseconds to ticks */
1990/03091		/* * SR bits */ #define SUPER 0x2000 #define SPL(n) (n<<8) /* * CACR */ #define CCLEAR 0x08 #define CENABLE 0x01 /*
1990/1223		* Magic registers (unused in current system)
1990/03091		*/ #define MACH A5 /* A5 is m-> */ #define USER A4 /* A4 is u-> */ /* * Fundamental addresses */ #define USERADDR 0x80000000
1991/0319		#define UREGADDR (USERADDR+BY2PG-(2+4+2+(8+8+1+1)*BY2WD))
1990/03091		/* * Devices poked during bootstrap */ #define TACADDR 0x40600000 #define MOUSE 0x40200000 /* * MMU */
1990/08101		#define VAMASK 0xCFFFFFFF /* clear balu bits in address */
1990/03091		#define KUSEG 0x00000000 #define KSEG 0x80000000 /* * MMU entries */ #define PTEVALID (1<<13)
1990/1212		#define PTEWRITE 0
1990/03091		#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 */
1991/0523		#define TSTKSIZ 100 #define USTKTOP (TSTKTOP-TSTKSIZ*BY2PG) /* byte just beyond user stack */
1990/03091		#define KZERO KSEG /* base of kernel address space */ #define KTZERO (KZERO+BY2PG) /* first address in kernel text */
1990/0821		#define USTACKSIZE (4*1024*1024) /* size of user stack */
1990/03091		#define NSEG 5 #define MACHSIZE 4096
1991/0411		#define isphys(p) ((((ulong)(p))&0xF0000000) == KSEG)