1 /* $NetBSD: mips_param.h,v 1.33 2012/02/01 02:05:51 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 #define ALIGNBYTES32 (sizeof(double) - 1) 44 #define ALIGN32(p) (((uintptr_t)(p) + ALIGNBYTES32) &~ALIGNBYTES32) 45 46 /* 47 * On mips, UPAGES is fixed by sys/arch/mips/mips/locore code 48 * to be the number of per-process-wired kernel-stack pages/PTES. 49 */ 50 51 #define SSIZE 1 /* initial stack size/NBPG */ 52 #define SINCR 1 /* increment of stack/NBPG */ 53 54 #ifdef ENABLE_MIPS_16KB_PAGE 55 #define UPAGES 1 /* pages of u-area */ 56 #define USPACE (UPAGES*NBPG) /* size of u-area in bytes */ 57 #elif defined(ENABLE_MIPS_4KB_PAGE) || 1 58 #define UPAGES 2 /* pages of u-area */ 59 #define USPACE (UPAGES*NBPG) /* size of u-area in bytes */ 60 #else 61 #error ENABLE_MIPS_xKB_PAGE not defined 62 #endif 63 #define USPACE_ALIGN USPACE /* make sure it starts on a even VA */ 64 65 #ifndef MSGBUFSIZE 66 #define MSGBUFSIZE NBPG /* default message buffer size */ 67 #endif 68 69 #ifndef COHERENCY_UNIT 70 #define COHERENCY_UNIT 32 /* MIPS cachelines are usually 32 bytes */ 71 #endif 72 73 #ifdef ENABLE_MIPS_16KB_PAGE 74 #define NBPG 16384 /* bytes/page */ 75 #define PGSHIFT 14 /* LOG2(NBPG) */ 76 #else 77 #define NBPG 4096 /* bytes/page */ 78 #define PGSHIFT 12 /* LOG2(NBPG) */ 79 #endif 80 #define PGOFSET (NBPG-1) /* byte offset into page */ 81 #define NPTEPG (NBPG/4) 82 83 #define NBSEG (NBPG*NPTEPG) /* bytes/segment */ 84 #define SEGOFSET (NBSEG-1) /* byte offset into segment */ 85 #define SEGSHIFT (PGSHIFT+(PGSHIFT-2)) /* LOG2(NBSEG) */ 86 87 #ifdef _LP64 88 #define NSEGPG (NBPG/8) 89 #define NBXSEG (NSEGPG*NBSEG) /* bytes/xsegment */ 90 #define XSEGOFSET (NBSEG-1) /* byte offset into segment */ 91 #define XSEGSHIFT (SEGSHIFT+(PGSHIFT-3)) /* LOG2(NBXSEG) */ 92 #endif 93 94 /* 95 * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized 96 * logical pages. 97 */ 98 #define NKMEMPAGES_MIN_DEFAULT ((8 * 1024 * 1024) >> PAGE_SHIFT) 99 #define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT) 100 101 /* 102 * Mach derived conversion macros 103 */ 104 #define mips_round_page(x) ((((uintptr_t)(x)) + NBPG - 1) & ~(NBPG-1)) 105 #define mips_trunc_page(x) ((uintptr_t)(x) & ~(NBPG-1)) 106 #define mips_btop(x) ((paddr_t)(x) >> PGSHIFT) 107 #define mips_ptob(x) ((paddr_t)(x) << PGSHIFT) 108 109 #ifdef __MIPSEL__ 110 #define MID_MACHINE MID_PMAX /* MID_PMAX (little-endian) */ 111 #endif 112 #ifdef __MIPSEB__ 113 #define MID_MACHINE MID_MIPS /* MID_MIPS (big-endian) */ 114 #endif 115 116 /* 117 * Constants related to network buffer management. 118 * MCLBYTES must be no larger than NBPG (the software page size), and, 119 * on machines that exchange pages of input or output buffers with mbuf 120 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple 121 * of the hardware page size. 122 */ 123 #ifndef MSIZE 124 #ifdef _LP64 125 #define MSIZE 512 /* size of an mbuf */ 126 #else 127 #define MSIZE 256 /* size of an mbuf */ 128 #endif 129 130 #ifndef MCLSHIFT 131 # define MCLSHIFT 11 /* convert bytes to m_buf clusters */ 132 #endif /* MCLSHIFT */ 133 134 #define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */ 135 136 #endif 137