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- #define BY2WD 4 /* bytes per word */
- #define BY2V 8 /* bytes per vlong */
- #define BY2PG 4096 /* bytes per page */
- #define PGSHIFT 12 /* log(BY2PG) */
- #define PGROUND(s) (((s)+(BY2PG-1))&~(BY2PG-1))
- #define MB (1024*1024)
- #define HZ (82) /* clock frequency */
- #define TK2MS(t) (((ulong)(t)*1000)/HZ) /* ticks to milliseconds - beware rounding */
- #define MS2TK(t) (((ulong)(t)*HZ)/1000) /* milliseconds to ticks - beware rounding */
- #define TK2SEC(t) ((t)/HZ) /* ticks to seconds */
- /*
- * Fundamental addresses
- */
- /*
- * KZERO == 0 or 0x80000000 will work fine. 0x10000000 will work but limit
- * usable memory to 256MB.
- */
- #define KZERO 0x80000000 /* base of kernel address space */
- #define KTZERO (KZERO+0x100000) /* first address in kernel text */
- #define IDTADDR (KZERO+0x800) /* idt */
- #define APBOOTSTRAP (KZERO+0x1000) /* AP bootstrap code */
- #define CONFADDR (KZERO+0x1200) /* info passed from boot loader */
- #define CPU0PDB (KZERO+0x2000) /* bootstrap processor PDB */
- #define CPU0PTE (KZERO+0x3000) /* bootstrap processor PTE's for 0-2MB */
- #define CPU0MACHPTE (KZERO+0x4000) /* bootstrap processor PTE for MACHADDR */
- #define CPU0MACH (KZERO+0x5000) /* Mach for bootstrap processor */
- #define MACHSIZE 4096
- /*
- * known 80386 segments (in GDT) and their selectors
- */
- #define NULLSEG 0 /* null segment */
- #define KDSEG 1 /* kernel data/stack */
- #define KESEG 2 /* kernel executable */
- #define UDSEG 3 /* user data/stack */
- #define UESEG 4 /* user executable */
- #define TSSSEG 5 /* task segment */
- #define N386SEG 6 /* number of segments */
- #define SELGDT (0<<3) /* selector is in gdt */
- #define SELLDT (1<<3) /* selector is in ldt */
- #define SELECTOR(i, t, p) (((i)<<3) | (t) | (p))
- #define NULLSEL SELECTOR(NULLSEG, SELGDT, 0)
- #define KESEL SELECTOR(KESEG, SELGDT, 0)
- #define KDSEL SELECTOR(KDSEG, SELGDT, 0)
- #define UESEL SELECTOR(UESEG, SELGDT, 3)
- #define UDSEL SELECTOR(UDSEG, SELGDT, 3)
- #define TSSSEL SELECTOR(TSSSEG, SELGDT, 0)
- /*
- * fields in segment descriptors
- */
- #define SEGDATA (0x10<<8) /* data/stack segment */
- #define SEGEXEC (0x18<<8) /* executable segment */
- #define SEGTSS (0x9<<8) /* TSS segment */
- #define SEGCG (0x0C<<8) /* call gate */
- #define SEGIG (0x0E<<8) /* interrupt gate */
- #define SEGTG (0x0F<<8) /* task gate */
- #define SEGTYPE (0x1F<<8)
- #define SEGP (1<<15) /* segment present */
- #define SEGPL(x) ((x)<<13) /* priority level */
- #define SEGB (1<<22) /* granularity 1==4k (for expand-down) */
- #define SEGG (1<<23) /* granularity 1==4k (for other) */
- #define SEGE (1<<10) /* expand down */
- #define SEGW (1<<9) /* writable (for data/stack) */
- #define SEGR (1<<9) /* readable (for code) */
- #define SEGD (1<<22) /* default 1==32bit (for code) */
- /*
- * physical MMU
- */
- #define PTEVALID (1<<0)
- #define PTEUNCACHED (1<<4)
- #define PTEWRITE (1<<1)
- #define PTERONLY (0<<1)
- #define PTEKERNEL (0<<2)
- #define PTEUSER (1<<2)
- #define PTESIZE (1<<7)
- #define MACHADDR ((ulong)&mach0) /* hack number 1 */
- #define IFLAG 0x200 /* psw: interrupt enable, to be accurate */
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