1 /* $NetBSD: mips_param.h,v 1.5 1997/07/07 03:54:30 jonathan 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 UPAGES 2 /* pages of u-area */ 16 #define UADDR 0xffffc000 /* address of u */ 17 #define USPACE (UPAGES*NBPG) /* size of u-area in bytes */ 18 #define UVPN (UADDR>>PGSHIFT)/* virtual page number of u */ 19 #define KERNELSTACK (UADDR+UPAGES*NBPG) /* top of kernel stack */ 20 21 22 /* 23 * Round p (pointer or byte index) up to a correctly-aligned value for all 24 * data types (int, long, ...). The result is u_int and must be cast to 25 * any desired pointer type. 26 */ 27 #define ALIGNBYTES 7 28 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES) 29 #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0) 30 31 #define NBPG 4096 /* bytes/page */ 32 #define PGOFSET (NBPG-1) /* byte offset into page */ 33 #define PGSHIFT 12 /* LOG2(NBPG) */ 34 #define NPTEPG (NBPG/4) 35 36 #define NBSEG 0x400000 /* bytes/segment */ 37 #define SEGOFSET (NBSEG-1) /* byte offset into segment */ 38 #define SEGSHIFT 22 /* LOG2(NBSEG) */ 39 40 /* 41 * Size of kernel malloc arena in CLBYTES-sized logical pages 42 */ 43 #ifndef NKMEMCLUSTERS 44 #define NKMEMCLUSTERS (512*1024/CLBYTES) 45 #endif 46 47 /* pages ("clicks") (4096 bytes) to disk blocks */ 48 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT)) 49 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT)) 50 51 /* pages to bytes */ 52 #define ctob(x) ((x) << PGSHIFT) 53 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT) 54 55 /* bytes to disk blocks */ 56 #define btodb(x) ((x) >> DEV_BSHIFT) 57 #define dbtob(x) ((x) << DEV_BSHIFT) 58 59 /* 60 * Map a ``block device block'' to a file system block. 61 * This should be device dependent, and should use the bsize 62 * field from the disk label. 63 * For now though just use DEV_BSIZE. 64 */ 65 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE)) 66 67 /* 68 * Mach derived conversion macros 69 */ 70 #define mips_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1)) 71 #define mips_trunc_page(x) ((unsigned)(x) & ~(NBPG-1)) 72 #define mips_btop(x) ((unsigned)(x) >> PGSHIFT) 73 #define mips_ptob(x) ((unsigned)(x) << PGSHIFT) 74 75 #ifdef _KERNEL 76 #ifndef _LOCORE 77 typedef int spl_t; 78 extern spl_t splx __P((spl_t)); 79 extern spl_t splsoftnet __P((void)), splsoftclock __P((void)); 80 extern spl_t splhigh __P((void)); 81 extern spl_t spl0 __P((void)); /* XXX should not enable TC on 3min */ 82 83 extern void setsoftnet __P((void)), clearsoftnet __P((void)); 84 extern void setsoftclock __P((void)), clearsoftclock __P((void)); 85 86 87 extern int (*Mach_splnet) __P((void)), (*Mach_splbio) __P((void)), 88 (*Mach_splimp) __P((void)), (*Mach_spltty) __P((void)), 89 (*Mach_splclock) __P((void)), (*Mach_splstatclock) __P((void)), 90 (*Mach_splnone) __P((void)); 91 #define splnet() ((*Mach_splnet)()) 92 #define splbio() ((*Mach_splbio)()) 93 #define splimp() ((*Mach_splimp)()) 94 #define spltty() ((*Mach_spltty)()) 95 #define splclock() ((*Mach_splclock)()) 96 #define splstatclock() ((*Mach_splstatclock)()) 97 98 extern void delay __P((int n)); 99 100 #endif /* _LOCORE */ 101 #endif /* _KERNEL */ 102