1/* $NetBSD: param.h,v 1.63 2025/04/24 11:01:27 martin Exp $ */
2
3/*
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This software was developed by the Computer Systems Engineering group
8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
9 * contributed to Berkeley.
10 *
11 * All advertising materials mentioning features or use of this software
12 * must display the following acknowledgement:
13 * This product includes software developed by the University of
14 * California, Lawrence Berkeley Laboratory.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 * 3. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 *
40 * @(#)param.h 8.1 (Berkeley) 6/11/93
41 */
42
43/*
44 * Copyright (c) 1996-2002 Eduardo Horvath
45 *
46 * Redistribution and use in source and binary forms, with or without
47 * modification, are permitted provided that the following conditions
48 * are met:
49 * 1. Redistributions of source code must retain the above copyright
50 * notice, this list of conditions and the following disclaimer.
51 *
52 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62 * SUCH DAMAGE.
63 *
64 */
65
66#if defined(_KERNEL_OPT)
67#include "opt_param.h"
68#include "opt_sparc_arch.h"
69#endif
70
71#ifdef __arch64__
72#define _MACHINE sparc64
73#define MACHINE "sparc64"
74#define _MACHINE_ARCH sparc64
75#define MACHINE_ARCH "sparc64"
76#define MID_MACHINE MID_SPARC64
77#else
78#define _MACHINE sparc
79#define MACHINE "sparc"
80#define _MACHINE_ARCH sparc
81#define MACHINE_ARCH "sparc"
82#define MID_MACHINE MID_SPARC
83#endif
84
85#ifdef _KERNEL /* XXX */
86#ifndef _LOCORE /* XXX */
87#include <machine/cpu.h> /* XXX */
88#endif /* XXX */
89#endif /* XXX */
90
91#define ALIGNBYTES32 0x7
92#define ALIGNBYTES64 0xf
93#define ALIGN32(p) (((u_long)(p) + ALIGNBYTES32) & ~ALIGNBYTES32)
94
95
96/*
97 * The following variables are always defined and initialized (in locore)
98 * so independently compiled modules (e.g. LKMs) can be used irrespective
99 * of the `options SUN4?' combination a particular kernel was configured with.
100 * See also the definitions of NBPG, PGOFSET and PGSHIFT below.
101 */
102#if (defined(_KERNEL) || defined(_STANDALONE)) && !defined(_LOCORE)
103extern int nbpg, pgofset, pgshift;
104#endif
105
106#ifdef __arch64__
107
108#ifdef SUN4V
109#define MAXCPUS 256
110#endif
111
112/* We get stack overflows w/8K stacks in 64-bit mode */
113#define SSIZE 2 /* initial stack size in pages */
114#else
115#define SSIZE 2
116#endif
117#define USPACE (SSIZE*8192)
118
119
120/*
121 * Here are all the magic kernel virtual addresses and how they're allocated.
122 *
123 * First, the PROM is usually a fixed-sized block from 0x00000000f0000000 to
124 * 0x00000000f0100000. It also uses some space around 0x00000000fff00000 to
125 * map in device registers. The rest is pretty much ours to play with.
126 *
127 * The kernel starts at KERNBASE. Here's the layout. We use macros to set
128 * the addresses so we can relocate everything easily. We use 4MB locked TTEs
129 * to map in the kernel text and data segments. Any extra pages are recycled,
130 * so they can potentially be double-mapped. This shouldn't really be a
131 * problem since they're unused, but wild pointers can cause silent data
132 * corruption if they are in those segments.
133 *
134 * 0x0000000000000000: 64K NFO page zero
135 * 0x0000000000010000: Userland or PROM
136 * KERNBASE: 4MB (or multiple thereof) kernel text and read only
137 * data. This is mapped in the ITLB and
138 * Read-Only in the DTLB
139 * KERNBASE+0x400000: 4MB kernel data and BSS -- not in ITLB
140 * Contains context table, kernel pmap,
141 * and other important structures.
142 * KERNBASE+0x800000: Unmapped page -- redzone
143 * KERNBASE+0x802000: Process 0 stack and u-area
144 * KERNBASE+0x806000: 2 pages for pmap_copy_page and /dev/mem
145 *
146 * For 32 bit kernels:
147 * KERNBASE+0x80a000: Start of kernel VA segment
148 * KERNEND: End of kernel VA segment
149 *
150 * KERNEND+0x02000: Auxreg_va (unused?)
151 * KERNEND+0x04000: TMPMAP_VA (unused?)
152 * KERNEND+0x06000: message buffer.
153 * KERNEND+0x010000: INTSTACK -- per-cpu 64K locked TTE
154 * Contains interrupt stack (32KB), cpu_info structure
155 * and panicstack (32KB)
156 * KERNEND+0x018000: CPUINFO_VA -- cpu_info structure
157 * KERNEND+0x020000: unmapped space (top of panicstack)
158 * KERNEND+0x022000: IODEV_BASE -- begin mapping IO devices here.
159 * 0x00000000f0000000: IODEV_END -- end of device mapping space.
160 *
161 * For 64 bit kernels:
162 * 0x100000000: Start of kernel VA segment (theoretically upto
163 * the VA hole)
164 *
165 */
166#define KERNBASE 0x001000000 /* start of kernel virtual space */
167#define KERNEND 0x0e0000000 /* end of kernel virtual space */
168
169#define _MAXNBPG 8192 /* fixed VAs, independent of actual NBPG */
170
171#define MSGBUF_VA ( KERNEND + _MAXNBPG) /* 1 page REDZONE */
172/*
173 * Maximum message buffer size is 248k.
174 * Here's the location of the interrupt stack and CPU structure.
175 */
176#define INTSTACK ( KERNEND + 32*_MAXNBPG)
177#define EINTSTACK ( INTSTACK + 4*_MAXNBPG)
178#define CPUINFO_VA ( EINTSTACK )
179#define PANICSTACK ( INTSTACK + 8*_MAXNBPG)
180#define IODEV_BASE ( INTSTACK + 9*_MAXNBPG) /* 1 page redzone */
181#define IODEV_END 0x0f0000000UL /* ~16 MB of iospace */
182
183/*
184 * Constants related to network buffer management.
185 * MCLBYTES must be no larger than NBPG (the software page size), and,
186 * on machines that exchange pages of input or output buffers with mbuf
187 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
188 * of the hardware page size.
189 */
190#define MSIZE 256 /* size of an mbuf */
191
192#ifndef MCLSHIFT
193#define MCLSHIFT 11 /* convert bytes to m_buf clusters */
194 /* 2K cluster can hold Ether frame */
195#endif /* MCLSHIFT */
196
197#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */
198
199#if !defined (MSGBUFSIZE) /* options MSGBUFSIZE=integer */
200#define MSGBUFSIZE (4 * NBPG)
201#else
202#if INTSTACK - MSGBUF_VA - MSGBUFSIZE < 0
203#error MSGBUFSIZE is too large
204#endif
205#endif
206
207/*
208 * Minimum size of the kernel kmem_arena in PAGE_SIZE-sized
209 * logical pages.
210 * For 32bit kernels:
211 * Maximum of 2.5GB on sparc64 (it must fit into KERNEND - KERNBASE, and also
212 * leave space in the kernel_map for other allocations).
213 * For 64bit kernels:
214 * Unlimited. (Practically there is a limit, we use VA starting at 4GB upto
215 * the VA-hole, but let us call this unlimited for now.)
216 */
217#define NKMEMPAGES_MIN_DEFAULT ((64 * 1024 * 1024) >> PAGE_SHIFT)
218#ifdef __arch64__
219#define NKMEMPAGES_MAX_UNLIMITED
220#else
221#undef NKMEMPAGES_MAX_UNLIMITED
222#define NKMEMPAGES_MAX_DEFAULT ((2048UL * 1024 * 1024) >> PAGE_SHIFT)
223#endif
224
225#ifdef _KERNEL
226#ifndef _LOCORE
227
228#ifndef __HIDE_DELAY
229extern void delay(unsigned int);
230#define DELAY(n) delay(n)
231#endif /* __HIDE_DELAY */
232
233/* Keep this a const so compiler optimization is done */
234extern const int cputyp;
235
236#if defined (SUN4US) || defined (SUN4V)
237#define CPU_ISSUN4U (cputyp == CPU_SUN4U)
238#define CPU_ISSUN4US (cputyp == CPU_SUN4US)
239#define CPU_ISSUN4V (cputyp == CPU_SUN4V)
240#else
241#define CPU_ISSUN4U (1)
242#define CPU_ISSUN4US (0)
243#define CPU_ISSUN4V (0)
244#endif
245
246#endif /* _LOCORE */
247#endif /* _KERNEL */
248
249/*
250 * Values for the cputyp variable.
251 */
252#define CPU_SUN4 0
253#define CPU_SUN4C 1
254#define CPU_SUN4M 2
255#define CPU_SUN4U 3
256#define CPU_SUN4US 4
257#define CPU_SUN4V 5
258
259/*
260 * Shorthand CPU-type macros. Enumerate all eight cases.
261 * Let compiler optimize away code conditional on constants.
262 *
263 * On a sun4 machine, the page size is 8192, while on a sun4c and sun4m
264 * it is 4096. Therefore, in the (SUN4 && (SUN4C || SUN4M)) cases below,
265 * NBPG, PGOFSET and PGSHIFT are defined as variables which are initialized
266 * early in locore.s after the machine type has been detected.
267 *
268 * Note that whenever the macros defined below evaluate to expressions
269 * involving variables, the kernel will perform slightly worse due to the
270 * extra memory references they'll generate.
271 */
272
273#define CPU_ISSUN4M (0)
274#define CPU_ISSUN4C (0)
275#define CPU_ISSUN4 (0)
276
277
278#define PGSHIFT 13 /* log2(NBPG) */
279#define NBPG (1<<PGSHIFT) /* bytes/page */
280#define PGOFSET (NBPG-1) /* byte offset into page */
281
282#define PCI_MAGIC_IO_RANGE 0x100000000LL
283
284#ifdef __arch64__
285#define STACK_ALIGNBYTES ALIGNBYTES64
286#else
287#define STACK_ALIGNBYTES ALIGNBYTES32
288#endif