1 /* $NetBSD: mips_param.h,v 1.29 2011/03/05 14:26:01 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 * Userland code should be using uname/sysctl to get MACHINE so simply 36 * export a generic MACHINE of "mips" 37 */ 38 #ifndef _KERNEL 39 #undef MACHINE 40 #define MACHINE "mips" 41 #endif 42 43 /* 44 * On mips, UPAGES is fixed by sys/arch/mips/mips/locore code 45 * to be the number of per-process-wired kernel-stack pages/PTES. 46 */ 47 48 #define SSIZE 1 /* initial stack size/NBPG */ 49 #define SINCR 1 /* increment of stack/NBPG */ 50 51 #ifdef ENABLE_MIPS_16KB_PAGE 52 #define UPAGES 1 /* pages of u-area */ 53 #define USPACE (UPAGES*NBPG) /* size of u-area in bytes */ 54 #elif defined(ENABLE_MIPS_4KB_PAGE) || 1 55 #define UPAGES 2 /* pages of u-area */ 56 #define USPACE (UPAGES*NBPG) /* size of u-area in bytes */ 57 #else 58 #error ENABLE_MIPS_xKB_PAGE not defined 59 #endif 60 #define USPACE_ALIGN USPACE /* make sure it starts on a even VA */ 61 62 #ifndef MSGBUFSIZE 63 #define MSGBUFSIZE NBPG /* default message buffer size */ 64 #endif 65 66 #ifndef COHERENCY_UNIT 67 #define COHERENCY_UNIT 32 /* MIPS cachelines are usually 32 bytes */ 68 #endif 69 70 /* 71 * Round p (pointer or byte index) up to a correctly-aligned value for all 72 * data types (int, long, ...). The result is u_int and must be cast to 73 * any desired pointer type. 74 * 75 * ALIGNED_POINTER is a boolean macro that checks whether an address 76 * is valid to fetch data elements of type t from on this architecture. 77 * This does not reflect the optimal alignment, just the possibility 78 * (within reasonable limits). 79 * 80 */ 81 #define ALIGNBYTES 7 82 #define ALIGN(p) (((uintptr_t)(p) + ALIGNBYTES) & ~ALIGNBYTES) 83 #define ALIGNED_POINTER(p,t) ((((uintptr_t)(p)) & (sizeof(t)-1)) == 0) 84 85 #ifdef ENABLE_MIPS_16KB_PAGE 86 #define NBPG 16384 /* bytes/page */ 87 #define PGSHIFT 14 /* LOG2(NBPG) */ 88 #else 89 #define NBPG 4096 /* bytes/page */ 90 #define PGSHIFT 12 /* LOG2(NBPG) */ 91 #endif 92 #define PGOFSET (NBPG-1) /* byte offset into page */ 93 #define NPTEPG (NBPG/4) 94 95 #define NBSEG (NBPG*NPTEPG) /* bytes/segment */ 96 #define SEGOFSET (NBSEG-1) /* byte offset into segment */ 97 #define SEGSHIFT (PGSHIFT+(PGSHIFT-2)) /* LOG2(NBSEG) */ 98 99 #ifdef _LP64 100 #define NSEGPG (NBPG/8) 101 #define NBXSEG (NSEGPG*NBSEG) /* bytes/xsegment */ 102 #define XSEGOFSET (NBSEG-1) /* byte offset into segment */ 103 #define XSEGSHIFT (SEGSHIFT+(PGSHIFT-3)) /* LOG2(NBXSEG) */ 104 #endif 105 106 /* 107 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 108 * logical pages. 109 */ 110 #define NKMEMPAGES_MIN_DEFAULT ((8 * 1024 * 1024) >> PAGE_SHIFT) 111 #define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT) 112 113 /* 114 * Mach derived conversion macros 115 */ 116 #define mips_round_page(x) ((((uintptr_t)(x)) + NBPG - 1) & ~(NBPG-1)) 117 #define mips_trunc_page(x) ((uintptr_t)(x) & ~(NBPG-1)) 118 #define mips_btop(x) ((paddr_t)(x) >> PGSHIFT) 119 #define mips_ptob(x) ((paddr_t)(x) << PGSHIFT) 120 121 #ifdef __MIPSEL__ 122 #define MID_MACHINE MID_PMAX /* MID_PMAX (little-endian) */ 123 #endif 124 #ifdef __MIPSEB__ 125 #define MID_MACHINE MID_MIPS /* MID_MIPS (big-endian) */ 126 #endif 127 128 /* 129 * Constants related to network buffer management. 130 * MCLBYTES must be no larger than NBPG (the software page size), and, 131 * on machines that exchange pages of input or output buffers with mbuf 132 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 133 * of the hardware page size. 134 */ 135 #ifndef MSIZE 136 #ifdef _LP64 137 #define MSIZE 512 /* size of an mbuf */ 138 #else 139 #define MSIZE 256 /* size of an mbuf */ 140 #endif 141 142 #ifndef MCLSHIFT 143 # define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 144 #endif /* MCLSHIFT */ 145 146 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 147 148 #endif 149