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/* $NetBSD: mips_param.h,v 1.27 2010/02/08 19:02:30 joerg Exp $ */
#ifdef _KERNEL
#include <machine/cpu.h>
#endif
/*
* No reason this can't be common
*/
#if defined(__MIPSEB__)
# if defined(__mips_n32) || defined(__mips_n64)
# define _MACHINE_ARCH mips64eb
# define MACHINE_ARCH "mips64eb"
# define _MACHINE32_ARCH mipseb
# define MACHINE32_ARCH "mipseb"
# else
# define _MACHINE_ARCH mipseb
# define MACHINE_ARCH "mipseb"
# endif
#elif defined(__MIPSEL__)
# if defined(__mips_n32) || defined(__mips_n64)
# define _MACHINE_ARCH mips64el
# define MACHINE_ARCH "mips64el"
# define _MACHINE32_ARCH mipsel
# define MACHINE32_ARCH "mipsel"
# else
# define _MACHINE_ARCH mipsel
# define MACHINE_ARCH "mipsel"
#endif
#else
#error neither __MIPSEL__ nor __MIPSEB__ are defined.
#endif
/*
* On mips, UPAGES is fixed by sys/arch/mips/mips/locore code
* to be the number of per-process-wired kernel-stack pages/PTES.
*/
#define SSIZE 1 /* initial stack size/NBPG */
#define SINCR 1 /* increment of stack/NBPG */
#ifdef ENABLE_MIPS_16KB_PAGE
#define UPAGES 1 /* pages of u-area */
#define USPACE (UPAGES*NBPG) /* size of u-area in bytes */
#elif defined(ENABLE_MIPS_4KB_PAGE) || 1
#define UPAGES 2 /* pages of u-area */
#define USPACE (UPAGES*NBPG) /* size of u-area in bytes */
#else
#error ENABLE_MIPS_xKB_PAGE not defined
#endif
#ifndef MSGBUFSIZE
#define MSGBUFSIZE NBPG /* default message buffer size */
#endif
/*
* Round p (pointer or byte index) up to a correctly-aligned value for all
* data types (int, long, ...). The result is u_int and must be cast to
* any desired pointer type.
*
* ALIGNED_POINTER is a boolean macro that checks whether an address
* is valid to fetch data elements of type t from on this architecture.
* This does not reflect the optimal alignment, just the possibility
* (within reasonable limits).
*
*/
#define ALIGNBYTES 7
#define ALIGN(p) (((uintptr_t)(p) + ALIGNBYTES) & ~ALIGNBYTES)
#define ALIGNED_POINTER(p,t) ((((uintptr_t)(p)) & (sizeof(t)-1)) == 0)
#ifdef ENABLE_MIPS_16KB_PAGE
#define NBPG 16384 /* bytes/page */
#define PGSHIFT 14 /* LOG2(NBPG) */
#else
#define NBPG 4096 /* bytes/page */
#define PGSHIFT 12 /* LOG2(NBPG) */
#endif
#define PGOFSET (NBPG-1) /* byte offset into page */
#define NPTEPG (NBPG/4)
#define NBSEG (NBPG*NPTEPG) /* bytes/segment */
#define SEGOFSET (NBSEG-1) /* byte offset into segment */
#define SEGSHIFT (2*PGSHIFT-2) /* LOG2(NBSEG) */
/*
* Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
* logical pages.
*/
#define NKMEMPAGES_MIN_DEFAULT ((8 * 1024 * 1024) >> PAGE_SHIFT)
#define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT)
/*
* Mach derived conversion macros
*/
#define mips_round_page(x) ((((uintptr_t)(x)) + NBPG - 1) & ~(NBPG-1))
#define mips_trunc_page(x) ((uintptr_t)(x) & ~(NBPG-1))
#define mips_btop(x) ((paddr_t)(x) >> PGSHIFT)
#define mips_ptob(x) ((paddr_t)(x) << PGSHIFT)
#ifdef __MIPSEL__
#define MID_MACHINE MID_PMAX /* MID_PMAX (little-endian) */
#endif
#ifdef __MIPSEB__
#define MID_MACHINE MID_MIPS /* MID_MIPS (big-endian) */
#endif
/*
* Constants related to network buffer management.
* MCLBYTES must be no larger than NBPG (the software page size), and,
* on machines that exchange pages of input or output buffers with mbuf
* clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
* of the hardware page size.
*/
#ifndef MSIZE
#ifdef _LP64
#define MSIZE 512 /* size of an mbuf */
#else
#define MSIZE 256 /* size of an mbuf */
#endif
#ifndef MCLSHIFT
# define MCLSHIFT 11 /* convert bytes to m_buf clusters */
#endif /* MCLSHIFT */
#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */
#endif
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