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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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