301 lines
11 KiB
C
301 lines
11 KiB
C
/* $NetBSD: param.h,v 1.31 2002/07/17 04:56:49 thorpej Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratory.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)param.h 8.1 (Berkeley) 6/11/93
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*/
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/*
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* Copyright (c) 1996-2002 Eduardo Horvath
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#if defined(_KERNEL_OPT)
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#include "opt_sparc_arch.h"
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#endif
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#define _MACHINE sparc64
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#define MACHINE "sparc64"
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#ifdef __arch64__
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#define _MACHINE_ARCH sparc64
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#define MACHINE_ARCH "sparc64"
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#define MID_MACHINE MID_SPARC64
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#else
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#define _MACHINE_ARCH sparc
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#define MACHINE_ARCH "sparc"
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#define MID_MACHINE MID_SPARC
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#endif
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#ifdef _KERNEL_OPT
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#include "opt_sparc_arch.h"
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#endif
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#ifdef _KERNEL /* XXX */
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#ifndef _LOCORE /* XXX */
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#include <machine/cpu.h> /* XXX */
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#endif /* XXX */
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#endif /* XXX */
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/*
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* Round p (pointer or byte index) up to a correctly-aligned value for
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* the machine's strictest data type. The result is u_int and must be
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* cast to any desired pointer type.
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*
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* ALIGNED_POINTER is a boolean macro that checks whether an address
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* is valid to fetch data elements of type t from on this architecture.
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* This does not reflect the optimal alignment, just the possibility
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* (within reasonable limits).
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*
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*/
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#define ALIGNBYTES32 0x7
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#define ALIGNBYTES64 0xf
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#ifdef __arch64__
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#define ALIGNBYTES ALIGNBYTES64
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#else
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#define ALIGNBYTES ALIGNBYTES32
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#endif
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#define ALIGN(p) (((u_long)(p) + ALIGNBYTES) & ~ALIGNBYTES)
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#define ALIGN32(p) (((u_long)(p) + ALIGNBYTES32) & ~ALIGNBYTES32)
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#define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0)
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/*
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* The following variables are always defined and initialized (in locore)
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* so independently compiled modules (e.g. LKMs) can be used irrespective
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* of the `options SUN4?' combination a particular kernel was configured with.
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* See also the definitions of NBPG, PGOFSET and PGSHIFT below.
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*/
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#if (defined(_KERNEL) || defined(_STANDALONE)) && !defined(_LOCORE)
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extern int nbpg, pgofset, pgshift;
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#endif
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#define DEV_BSIZE 512
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#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
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#define BLKDEV_IOSIZE 2048
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#define MAXPHYS (64 * 1024)
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#ifdef __arch64__
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/* We get stack overflows w/8K stacks in 64-bit mode */
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#define SSIZE 2 /* initial stack size in pages */
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#else
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#define SSIZE 2
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#endif
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#define USPACE (SSIZE*8192)
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/*
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* Here are all the magic kernel virtual addresses and how they're allocated.
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*
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* First, the PROM is usually a fixed-sized block from 0x00000000f0000000 to
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* 0x00000000f0100000. It also uses some space around 0x00000000fff00000 to
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* map in device registers. The rest is pretty much ours to play with.
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*
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* The kernel starts at KERNBASE. Here's they layout. We use macros to set
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* the addresses so we can relocate everything easily. We use 4MB locked TTEs
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* to map in the kernel text and data segments. Any extra pages are recycled,
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* so they can potentially be double-mapped. This shouldn't really be a
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* problem since they're unused, but wild pointers can cause silent data
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* corruption if they are in those segments.
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*
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* 0x0000000000000000: 64K NFO page zero
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* 0x0000000000010000: Userland or PROM
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* KERNBASE: 4MB kernel text and read only data
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* This is mapped in the ITLB and
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* Read-Only in the DTLB
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* KERNBASE+0x400000: 4MB kernel data and BSS -- not in ITLB
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* Contains context table, kernel pmap,
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* and other important structures.
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* KERNBASE+0x800000: Unmapped page -- redzone
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* KERNBASE+0x802000: Process 0 stack and u-area
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* KERNBASE+0x806000: 2 pages for pmap_copy_page and /dev/mem
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* KERNBASE+0x80a000: Start of kernel VA segment
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* KERNEND: End of kernel VA segment
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* KERNEND+0x02000: Auxreg_va (unused?)
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* KERNEND+0x04000: TMPMAP_VA (unused?)
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* KERNEND+0x06000: message buffer.
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* KERNEND+0x010000: 64K locked TTE -- different for each CPU
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* Contains interrupt stack, cpu_info structure,
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* and 32KB kernel TSB.
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* KERNEND+0x020000: IODEV_BASE -- begin mapping IO devices here.
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* 0x00000000fe000000: IODEV_END -- end of device mapping space.
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*
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*/
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#define KERNBASE 0x001000000 /* start of kernel virtual space */
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#define KERNEND 0x0e0000000 /* end of kernel virtual space */
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#define VM_MAX_KERNEL_BUF ((KERNEND-KERNBASE)/4)
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#define _MAXNBPG 8192 /* fixed VAs, independent of actual NBPG */
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#define AUXREG_VA ( KERNEND + _MAXNBPG) /* 1 page REDZONE */
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#define TMPMAP_VA ( AUXREG_VA + _MAXNBPG)
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#define MSGBUF_VA ( TMPMAP_VA + _MAXNBPG)
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/*
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* Here's the location of the interrupt stack and CPU structure.
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*/
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#define INTSTACK ( KERNEND + 8*_MAXNBPG)/* 64K after kernel end */
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#define EINTSTACK ( INTSTACK + 2*USPACE) /* 32KB */
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#define CPUINFO_VA ( EINTSTACK)
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#define IODEV_BASE ( CPUINFO_VA + 8*_MAXNBPG)/* 64K long */
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#define IODEV_END 0x0f0000000UL /* 16 MB of iospace */
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/*
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* Constants related to network buffer management.
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* MCLBYTES must be no larger than NBPG (the software page size), and,
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* on machines that exchange pages of input or output buffers with mbuf
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* clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
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* of the hardware page size.
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*/
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#define MSIZE 256 /* size of an mbuf */
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#ifndef MCLSHIFT
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#define MCLSHIFT 11 /* convert bytes to m_buf clusters */
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/* 2K cluster can hold Ether frame */
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#endif /* MCLSHIFT */
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#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */
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#ifndef NMBCLUSTERS
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#if defined(_KERNEL_OPT)
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#include "opt_gateway.h"
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#endif
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#ifdef GATEWAY
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#define NMBCLUSTERS 2048 /* map size, max cluster allocation */
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#else
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#define NMBCLUSTERS 1024 /* map size, max cluster allocation */
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#endif
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#endif
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#define MSGBUFSIZE NBPG
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/*
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* Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
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* logical pages.
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*/
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#define NKMEMPAGES_MIN_DEFAULT ((6 * 1024 * 1024) >> PAGE_SHIFT)
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#define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT)
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/* pages ("clicks") to disk blocks */
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#define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
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#define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
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/* pages to bytes */
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#define ctob(x) ((x) << PGSHIFT)
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#define btoc(x) (((vsize_t)(x) + PGOFSET) >> PGSHIFT)
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/* bytes to disk blocks */
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#define btodb(x) ((x) >> DEV_BSHIFT)
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#define dbtob(x) ((x) << DEV_BSHIFT)
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/*
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* Map a ``block device block'' to a file system block.
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* This should be device dependent, and should use the bsize
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* field from the disk label.
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* For now though just use DEV_BSIZE.
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*/
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#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE / DEV_BSIZE))
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#ifdef _KERNEL
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#ifndef _LOCORE
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extern void delay __P((unsigned int));
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#define DELAY(n) delay(n)
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#ifdef __arch64__
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/* If we're using a 64-bit kernel use 64-bit math */
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#define mstohz(ms) ((ms + 0UL) * hz / 1000)
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#endif
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extern int cputyp;
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#endif /* _LOCORE */
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#endif /* _KERNEL */
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/*
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* Values for the cputyp variable.
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*/
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#define CPU_SUN4 0
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#define CPU_SUN4C 1
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#define CPU_SUN4M 2
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#define CPU_SUN4U 3
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/*
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* Shorthand CPU-type macros. Enumerate all eight cases.
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* Let compiler optimize away code conditional on constants.
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*
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* On a sun4 machine, the page size is 8192, while on a sun4c and sun4m
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* it is 4096. Therefore, in the (SUN4 && (SUN4C || SUN4M)) cases below,
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* NBPG, PGOFSET and PGSHIFT are defined as variables which are initialized
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* early in locore.s after the machine type has been detected.
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*
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* Note that whenever the macros defined below evaluate to expressions
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* involving variables, the kernel will perform slighly worse due to the
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* extra memory references they'll generate.
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*/
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#define CPU_ISSUN4U (1)
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#define CPU_ISSUN4M (0)
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#define CPU_ISSUN4C (0)
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#define CPU_ISSUN4 (0)
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#define PGSHIFT 13 /* log2(NBPG) */
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#define NBPG (1<<PGSHIFT) /* bytes/page */
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#define PGOFSET (NBPG-1) /* byte offset into page */
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