1 /* $NetBSD: mips_param.h,v 1.7 1997/09/20 12:08:06 leo Exp $ */ 2 3 /* 4 * Architecture name. 5 */ 6 #define _MACHINE_ARCH mips 7 #define MACHINE_ARCH "mips" 8 9 /* 10 * NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE. 11 * On mips, UPAGES is fixed by sys/arch/mips/mips/locore code 12 * to be the number of per-process-wired kernel-stack pages/PTES. 13 */ 14 15 #define SSIZE 1 /* initial stack size/NBPG */ 16 #define SINCR 1 /* increment of stack/NBPG */ 17 18 #define UPAGES 2 /* pages of u-area */ 19 #define UADDR 0xffffc000 /* address of u */ 20 #define USPACE (UPAGES*NBPG) /* size of u-area in bytes */ 21 #define UVPN (UADDR>>PGSHIFT)/* virtual page number of u */ 22 #define KERNELSTACK (UADDR+UPAGES*NBPG) /* top of kernel stack */ 23 24 #ifndef MSGBUFSIZE 25 #define MSGBUFSIZE NBPG /* default message buffer size */ 26 #endif 27 28 /* 29 * Round p (pointer or byte index) up to a correctly-aligned value for all 30 * data types (int, long, ...). The result is u_int and must be cast to 31 * any desired pointer type. 32 */ 33 #define ALIGNBYTES 7 34 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) 35 #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 36 37 #define NBPG 4096 /* bytes/page */ 38 #define PGOFSET (NBPG-1) /* byte offset into page */ 39 #define PGSHIFT 12 /* LOG2(NBPG) */ 40 #define NPTEPG (NBPG/4) 41 42 #define NBSEG 0x400000 /* bytes/segment */ 43 #define SEGOFSET (NBSEG-1) /* byte offset into segment */ 44 #define SEGSHIFT 22 /* LOG2(NBSEG) */ 45 46 /* 47 * Size of kernel malloc arena in CLBYTES-sized logical pages 48 */ 49 #ifndef NKMEMCLUSTERS 50 #define NKMEMCLUSTERS (512*1024/CLBYTES) 51 #endif 52 53 /* pages ("clicks") (4096 bytes) to disk blocks */ 54 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 55 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 56 57 /* pages to bytes */ 58 #define ctob(x) ((x) << PGSHIFT) 59 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 60 61 /* bytes to disk blocks */ 62 #define btodb(x) ((x) >> DEV_BSHIFT) 63 #define dbtob(x) ((x) << DEV_BSHIFT) 64 65 /* 66 * Map a ``block device block'' to a file system block. 67 * This should be device dependent, and should use the bsize 68 * field from the disk label. 69 * For now though just use DEV_BSIZE. 70 */ 71 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 72 73 /* 74 * Mach derived conversion macros 75 */ 76 #define mips_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1)) 77 #define mips_trunc_page(x) ((unsigned)(x) & ~(NBPG-1)) 78 #define mips_btop(x) ((unsigned)(x) >> PGSHIFT) 79 #define mips_ptob(x) ((unsigned)(x) << PGSHIFT) 80 81 #ifdef _KERNEL 82 #ifndef _LOCORE 83 typedef int spl_t; 84 extern spl_t splx __P((spl_t)); 85 extern spl_t splsoftnet __P((void)), splsoftclock __P((void)); 86 extern spl_t splhigh __P((void)); 87 extern spl_t spl0 __P((void)); /* XXX should not enable TC on 3min */ 88 89 extern void setsoftnet __P((void)), clearsoftnet __P((void)); 90 extern void setsoftclock __P((void)), clearsoftclock __P((void)); 91 92 93 extern int (*Mach_splnet) __P((void)), (*Mach_splbio) __P((void)), 94 (*Mach_splimp) __P((void)), (*Mach_spltty) __P((void)), 95 (*Mach_splclock) __P((void)), (*Mach_splstatclock) __P((void)), 96 (*Mach_splnone) __P((void)); 97 #define splnet() ((*Mach_splnet)()) 98 #define splbio() ((*Mach_splbio)()) 99 #define splimp() ((*Mach_splimp)()) 100 #define spltty() ((*Mach_spltty)()) 101 #define splclock() ((*Mach_splclock)()) 102 #define splstatclock() ((*Mach_splstatclock)()) 103 104 extern void delay __P((int n)); 105 extern int cpuspeed; 106 #define DELAY(n) { register int N = cpuspeed * (n); while (--N > 0); } 107 108 109 #endif /* !_LOCORE */ 110 #endif /* _KERNEL */ 111