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- /*
- * 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 BY2V 8 /* bytes per vlong */
- #define BY2PG 8192 /* bytes per page */
- #define WD2PG (BY2PG/BY2WD) /* words per page */
- #define PGSHIFT 13 /* log(BY2PG) */
- #define ROUND(s, sz) (((s)+((sz)-1))&~((sz)-1))
- #define PGROUND(s) ROUND(s, BY2PG)
- #define BLOCKALIGN 8
- #define BY2PTE 8 /* bytes per pte entry */
- #define PTE2PG (BY2PG/BY2PTE) /* pte entries per page */
- #define MAXMACH 1 /* max # cpus system can run */
- #define KSTACK 4096 /* Size of kernel stack */
- /*
- * Time
- */
- #define HZ 100 /* clock frequency */
- #define MS2HZ (1000/HZ)
- #define TK2SEC(t) ((t)/HZ) /* ticks to seconds */
- /*
- * Magic registers
- */
- #define MACH 15 /* R15 is m-> */
- #define USER 14 /* R14 is up-> */
- /*
- * Fundamental addresses
- */
- /* XXX MACHADDR, MACHP(n) */
- /*
- * MMU
- *
- * A PTE is 64 bits, but a ulong is 32! Hence we encode
- * the PTEs specially for fault.c, and decode them in putmmu().
- * This means that we can only map the first 2G of physical
- * space via putmmu() - ie only physical memory, not devices.
- */
- #define PTEVALID 0x3301
- #define PTEKVALID 0x1101
- #define PTEASM 0x0010
- #define PTEGH(s) ((s)<<5)
- #define PTEWRITE 0
- #define PTERONLY 0x4
- #define PTEUNCACHED 0
- #define PPN(n) (((n)>>PGSHIFT)<<14)
- #define FIXPTE(x) ((((uvlong)(x)>>14)<<32)|((x) & 0x3fff))
- #define PTEPFN(pa) (((uvlong)(pa)>>PGSHIFT)<<32)
- #define NCOLOR 1
- #define getpgcolor(a) 0
- #define PTEMAPMEM (1024*1024)
- #define PTEPERTAB (PTEMAPMEM/BY2PG)
- #define SEGMAPSIZE 512
- #define SSEGMAPSIZE 16
- /*
- * Address spaces
- */
- #define UZERO 0 /* base of user address space */
- #define UTZERO (UZERO+BY2PG) /* first address in user text */
- #define USTKTOP (TSTKTOP-TSTKSIZ*BY2PG) /* byte just beyond user stack */
- #define TSTKTOP KZERO /* top of temporary stack */
- #define TSTKSIZ 100
- #define KZERO 0x80000000 /* base of kernel address space */
- #define KTZERO (KZERO+0x400000) /* first address in kernel text */
- #define USTKSIZE (4*1024*1024) /* size of user stack */
- /*
- * Processor Status (as returned by rdps)
- */
- #define UMODE 0x8
- #define IPL 0x7
- #define isphys(x) (((ulong)x&KZERO)!=0)
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