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mips_param.h revision 1.23.78.12 
      1 /*	mips_param.h,v 1.23.78.11 2011/12/27 16:09:36 matt Exp	*/
      2 
      3 #ifdef _KERNEL
      4 #include <machine/cpu.h>
      5 #endif
      6 
      7 /*
      8  * No reason this can't be common
      9  */
     10 #if defined(__MIPSEB__)
     11 # if defined(__mips_n32) || defined(__mips_n64)
     12 #  define	_MACHINE_ARCH	mips64eb
     13 #  define	MACHINE_ARCH	"mips64eb"
     14 #  define	_MACHINE32_ARCH	mipseb
     15 #  define	MACHINE32_ARCH	"mipseb"
     16 # else
     17 #  define	_MACHINE_ARCH	mipseb
     18 #  define	MACHINE_ARCH	"mipseb"
     19 # endif
     20 #elif defined(__MIPSEL__)
     21 # if defined(__mips_n32) || defined(__mips_n64)
     22 #  define	_MACHINE_ARCH	mips64el
     23 #  define	MACHINE_ARCH	"mips64el"
     24 #  define	_MACHINE32_ARCH	mipsel
     25 #  define	MACHINE32_ARCH	"mipsel"
     26 # else
     27 #  define	_MACHINE_ARCH	mipsel
     28 #  define	MACHINE_ARCH	"mipsel"
     29 #endif
     30 #else
     31 #error neither __MIPSEL__ nor __MIPSEB__ are defined.
     32 #endif
     33 
     34 /*
     35  * On mips, UPAGES is fixed by sys/arch/mips/mips/locore code
     36  * to be the number of per-process-wired kernel-stack pages/PTES.
     37  */
     38 
     39 #define	SSIZE		1		/* initial stack size/NBPG */
     40 #define	SINCR		1		/* increment of stack/NBPG */
     41 
     42 #if defined(_KERNEL) && !defined(_RUMPKERNEL) \
     43     && !defined(_MODULE) && !defined(_LKM)
     44 #ifdef PAGE_SHIFT
     45 #if MIPS_PAGE_SHIFT != PAGE_SHIFT
     46 #error MIPS_PAGE_SHIFT != PAGE_SHIFT
     47 #endif
     48 #elif defined(MIPS_PAGE_SHIFT)
     49 #define	PAGE_SHIFT	MIPS_PAGE_SHIFT
     50 #else
     51 #define	PAGE_SHIFT	12
     52 #endif
     53 #endif /* _KERNEL && !_RUMPKERNEL && !_MODULE && !_LKM */
     54 
     55 #if PAGE_SHIFT & 1
     56 #define	UPAGES		1		/* pages of u-area */
     57 #else
     58 #define	UPAGES		2		/* pages of u-area */
     59 #define	USPACE_ALIGN	USPACE		/* make sure it starts on a even VA */
     60 #endif
     61 
     62 #define	USPACE		(UPAGES*NBPG)	/* size of u-area in bytes */
     63 
     64 #ifndef MSGBUFSIZE
     65 #define MSGBUFSIZE	NBPG		/* default message buffer size */
     66 #endif
     67 
     68 #ifndef COHERENCY_UNIT
     69 #define COHERENCY_UNIT	32	/* MIPS cachelines are usually 32 bytes */
     70 #endif
     71 
     72 /*
     73  * Round p (pointer or byte index) up to a correctly-aligned value for all
     74  * data types (int, long, ...).   The result is u_int and must be cast to
     75  * any desired pointer type.
     76  *
     77  * ALIGNED_POINTER is a boolean macro that checks whether an address
     78  * is valid to fetch data elements of type t from on this architecture.
     79  * This does not reflect the optimal alignment, just the possibility
     80  * (within reasonable limits).
     81  *
     82  */
     83 #define	ALIGNBYTES	7
     84 #define	ALIGN(p)	(((uintptr_t)(p) + ALIGNBYTES) & ~ALIGNBYTES)
     85 #define ALIGNED_POINTER(p,t)	((((uintptr_t)(p)) & (sizeof(t)-1)) == 0)
     86 
     87 #define	PGSHIFT		PAGE_SHIFT	/* LOG2(NBPG) */
     88 #define	NBPG		(1 << PGSHIFT)	/* bytes/page */
     89 #define	PGOFSET		(NBPG-1)	/* byte offset into page */
     90 #define	NPTEPG		(NBPG/4)
     91 
     92 #define NBSEG		(NBPG*NPTEPG)	/* bytes/segment */
     93 #define	SEGOFSET	(NBSEG-1)	/* byte offset into segment */
     94 #define	SEGSHIFT	(PGSHIFT+(PGSHIFT-2))	/* LOG2(NBSEG) */
     95 
     96 #ifdef _LP64
     97 #define	NSEGPG		(NBPG/8)
     98 #define NBXSEG		((uint64_t)NSEGPG*NBSEG)	/* bytes/xsegment */
     99 #define	XSEGOFSET	(NBXSEG-1)	/* byte offset into xsegment */
    100 #define	XSEGSHIFT	(SEGSHIFT+(PGSHIFT-3))	/* LOG2(NBXSEG) */
    101 #endif
    102 
    103 /*
    104  * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
    105  * logical pages.
    106  */
    107 #define	NKMEMPAGES_MIN_DEFAULT	((8 * 1024 * 1024) >> PAGE_SHIFT)
    108 #define	NKMEMPAGES_MAX_DEFAULT	((128 * 1024 * 1024) >> PAGE_SHIFT)
    109 
    110 /*
    111  * Mach derived conversion macros
    112  */
    113 #define mips_round_page(x)	((((uintptr_t)(x)) + NBPG - 1) & ~(NBPG-1))
    114 #define mips_trunc_page(x)	((uintptr_t)(x) & ~(NBPG-1))
    115 #define mips_btop(x)		((paddr_t)(x) >> PGSHIFT)
    116 #define mips_ptob(x)		((paddr_t)(x) << PGSHIFT)
    117 
    118 /*
    119  * Constants related to network buffer management.
    120  * MCLBYTES must be no larger than NBPG (the software page size), and,
    121  * on machines that exchange pages of input or output buffers with mbuf
    122  * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
    123  * of the hardware page size.
    124  */
    125 #ifndef MSIZE
    126 #ifdef _LP64
    127 #define	MSIZE		512		/* size of an mbuf */
    128 #else
    129 #define	MSIZE		256		/* size of an mbuf */
    130 #endif
    131 
    132 #ifndef MCLSHIFT
    133 # define MCLSHIFT	11		/* convert bytes to m_buf clusters */
    134 #endif	/* MCLSHIFT */
    135 
    136 #define	MCLBYTES	(1 << MCLSHIFT)	/* size of a m_buf cluster */
    137 
    138 #ifndef NMBCLUSTERS
    139 #if defined(_KERNEL_OPT)
    140 #include "opt_gateway.h"
    141 #endif
    142 
    143 #ifdef GATEWAY
    144 #define	NMBCLUSTERS	2048		/* map size, max cluster allocation */
    145 #else
    146 #define	NMBCLUSTERS	1024		/* map size, max cluster allocation */
    147 #endif
    148 #endif
    149 #endif
    150