1993/1230/carrera/mem.h (diff list | history)

carrera/mem.h on 1993/0903
1993/0903		/* * 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 4096 /* bytes per page */ #define WD2PG (BY2PG/BY2WD) /* words per page */ #define PGSHIFT 12 /* log(BY2PG) */ #define PGROUND(s) (((s)+(BY2PG-1))&~(BY2PG-1))
1993/1211		#define MAXMACH 1 /* max # cpus system can run */
1993/0903		#define KSTACK 4096 /* Size of kernel stack */ /* * Time */ #define HZ 100 /* clock frequency */ #define MS2HZ (1000/HZ) /* millisec per clock tick */ #define TK2SEC(t) ((t)/HZ) /* ticks to seconds */ #define TK2MS(t) ((t)*MS2HZ) /* ticks to milliseconds */ #define MS2TK(t) ((t)/MS2HZ) /* milliseconds to ticks */ /* * CP0 registers */ #define INDEX 0 #define RANDOM 1 #define TLBPHYS0 2 #define TLBPHYS1 3 #define CONTEXT 4 #define PAGEMASK 5 #define WIRED 6 #define BADVADDR 8 #define COUNT 9 #define TLBVIRT 10 #define COMPARE 11 #define STATUS 12 #define CAUSE 13 #define EPC 14 #define PRID 15 #define CONFIG 16 #define LLADDR 17 #define WATCHLO 18 #define WATCHHI 19 #define CACHEECC 26 #define CACHEERR 27 #define TAGLO 28 #define TAGHI 29 #define ERROREPC 30 /* * M(STATUS) bits */ #define KMODEMASK 0x0000001f #define IE 0x00000001 #define EXL 0x00000002 #define ERL 0x00000004 #define KSUPER 0x00000008 #define KUSER 0x00000010 #define INTMASK 0x0000ff00 #define INTR0 0x00000100 #define INTR1 0x00000200 #define INTR2 0x00000400 #define INTR3 0x00000800 #define INTR4 0x00001000 #define INTR5 0x00002000 #define INTR6 0x00004000 #define INTR7 0x00008000 #define ISC 0x00010000 #define SWC 0x00020000
1993/0930		#define CU0 0x10000000
1993/0903		#define CU1 0x20000000 /*
1993/0906		* Trap vectors
1993/0903		*/ #define UTLBMISS (KSEG0+0x000) #define XEXCEPTION (KSEG0+0x80) #define CACHETRAP (KSEG0+0x100) #define EXCEPTION (KSEG0+0x180) /* * Magic registers */ #define USER 24 /* R24 is up-> */ #define MACH 25 /* R25 is m-> */ /* * Fundamental addresses */
1993/1211		#define MACHADDR (KTZERO-MAXMACH*BY2PG) /* warning: rdbg is near here */
1993/0906		#define UREGSIZE 0xA0 /* Sizeof(Ureg)+retpc & ur */
1993/0903		#define MACHP(n) ((Mach *)(MACHADDR+(n)*BY2PG)) /* * MMU */ #define PGSZ4K (0x00<<13)
1993/0904		#define PGSZ64K (0x0F<<13)
1993/0903		#define PGSZ256K (0x3F<<13)
1993/0907		#define PGSZ1M (0xFF<<13)
1993/0903		#define KUSEG 0x00000000 #define KSEG0 0x80000000 #define KSEG1 0xA0000000 #define KSEG2 0xC0000000 #define KSEG3 0xE0000000 #define KSEGM 0xE0000000 /* mask to check which seg */ #define PIDXSHFT 12 #define PIDX (0x7<<PIDXSHFT)
1993/1218		#define KMAPADDR 0xE2000000
1993/0906		#define KMAPMASK 0xFF000000
1993/0903		#define KMAPSHIFT 15 #define NCOLOR 8
1993/0906		#define getpgcolor(a) (((ulong)(a)>>PIDXSHFT)&7)
1993/0903		#define PTEGLOBL (1<<0) #define PTEVALID (1<<1) #define PTEWRITE (1<<2) #define PTERONLY 0 #define PTEALGMASK (7<<3) #define PTEUNCACHED (2<<3) #define PTENONCOHER (3<<3) #define PTECOHERXCL (4<<3) #define PTECOHERXCLW (5<<3) #define PTECOHERUPDW (6<<3)
1993/0908		#define IOPTE (PTEGLOBL|PTEVALID|PTEWRITE|PTEUNCACHED)
1993/0903		#define PTEPID(n) (n) #define TLBPID(n) ((n)&0xFF) #define PTEMAPMEM (1024*1024) #define PTEPERTAB (PTEMAPMEM/BY2PG) #define STLBLOG 13 #define STLBSIZE (1<<STLBLOG)
1993/1224		#define KPTELOG 7
1993/0903		#define KPTESIZE (1<<KPTELOG) #define SEGMAPSIZE 512 #define NTLBPID 256 /* number of pids */ #define NTLB 48 /* number of entries */ #define TLBROFF 4 /* offset of first randomly indexed entry */ /* * Address spaces */ #define UZERO KUSEG /* base of user address space */ #define UTZERO (UZERO+BY2PG) /* first address in user text */ #define USTKTOP (KZERO-BY2PG) /* byte just beyond user stack */ #define TSTKTOP (0xC0000000+USTKSIZE-BY2PG) /* top of temporary stack */ #define TSTKSIZ 100 #define KZERO KSEG0 /* base of kernel address space */ #define KTZERO (KZERO+0x20000) /* first address in kernel text */ #define USTKSIZE (4*1024*1024) /* size of user stack */
1993/1230		#define globalmem(x) (((ulong)x)&KZERO) /* addresses valid in all contexts */
1993/0903		/* * Exception codes */ #define EXCMASK 0x1f /* mask of all causes */ #define CINT 0 /* external interrupt */ #define CTLBM 1 /* TLB modification */ #define CTLBL 2 /* TLB miss (load or fetch) */ #define CTLBS 3 /* TLB miss (store) */ #define CADREL 4 /* address error (load or fetch) */ #define CADRES 5 /* address error (store) */ #define CBUSI 6 /* bus error (fetch) */ #define CBUSD 7 /* bus error (data load or store) */ #define CSYS 8 /* system call */ #define CBRK 9 /* breakpoint */ #define CRES 10 /* reserved instruction */ #define CCPU 11 /* coprocessor unusable */ #define COVF 12 /* arithmetic overflow */ #define CTRAP 13 /* trap */ #define CVCEI 14 /* virtual coherence exception (instruction) */ #define CFPE 15 /* floating point exception */ #define CWATCH 23 /* watch exception */ #define CVCED 31 /* virtual coherence exception (data) */ #define isphys(x) (((ulong)x&KSEGM)==KSEG0 || ((ulong)x&KSEGM)==KSEG1)