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i386 param.h

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Change-Id: I880dbe83ad611cc0736d2a76a9f67b133f2fc025
This commit is contained in:
Ben Gras 2013-12-13 19:55:06 +01:00 committed by Lionel Sambuc
parent 4316052bbe
commit ff10274392
1 changed files with 71 additions and 6 deletions
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73
sys/arch/i386/include/param.h
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@ -41,6 +41,13 @@
* Machine dependent constants for Intel 386.
*/
/*
* MAXCPUS must be defined before cpu.h inclusion. Note: i386 might
* support more CPUs, but due to the limited KVA space available on
* i386, such support would be inefficient. Use amd64 instead.
*/
#define MAXCPUS 32
#ifdef _KERNEL
#include <machine/cpu.h>
#endif
@ -58,10 +65,6 @@
#define PGOFSET (NBPG-1) /* byte offset into page */
#define NPTEPG (NBPG/(sizeof (pt_entry_t)))
#ifndef MAXPHYS
#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
#endif
#if defined(_KERNEL_OPT)
#include "opt_kernbase.h"
#endif /* defined(_KERNEL_OPT) */
@ -70,8 +73,70 @@
#error "You should only re-define KERNBASE"
#endif
#ifndef KERNBASE
#define KERNBASE 0xc0000000UL /* start of kernel virtual space */
#endif
#define KERNTEXTOFF (KERNBASE + 0x100000) /* start of kernel text */
#define BTOPKERNBASE (KERNBASE >> PGSHIFT)
#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
#define DEV_BSIZE (1 << DEV_BSHIFT)
#define BLKDEV_IOSIZE 2048
#ifndef MAXPHYS
#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
#endif
#define SSIZE 1 /* initial stack size/NBPG */
#define SINCR 1 /* increment of stack/NBPG */
#ifndef UPAGES
# ifdef DIAGNOSTIC
# define UPAGES 3 /* 2 + 1 page for redzone */
# else
# define UPAGES 2 /* normal pages of u-area */
# endif /* DIAGNOSTIC */
#endif /* !defined(UPAGES) */
#define USPACE (UPAGES * NBPG) /* total size of u-area */
#define INTRSTACKSIZE 8192
#ifndef MSGBUFSIZE
#define MSGBUFSIZE 8*NBPG /* default message buffer size */
#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.
*/
#define MSIZE 256 /* size of an mbuf */
#ifndef MCLSHIFT
#define MCLSHIFT 11 /* convert bytes to m_buf clusters */
/* 2K cluster can hold Ether frame */
#endif /* MCLSHIFT */
#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */
#ifndef NMBCLUSTERS_MAX
#define NMBCLUSTERS_MAX (0x2000000 / MCLBYTES) /* Limit to 64MB for clusters */
#endif
#ifndef NFS_RSIZE
#define NFS_RSIZE 32768
#endif
#ifndef NFS_WSIZE
#define NFS_WSIZE 32768
#endif
/*
* Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
* logical pages.
*/
#define NKMEMPAGES_MIN_DEFAULT ((16 * 1024 * 1024) >> PAGE_SHIFT)
#define NKMEMPAGES_MAX_DEFAULT ((360 * 1024 * 1024) >> PAGE_SHIFT)
/*
* Mach derived conversion macros