prep_machdep.c revision 1.5 
1/* $NetBSD: prep_machdep.c,v 1.5 2008/11/30 18:21:35 martin Exp $ */
2
3/*-
4 * Copyright (c) 2007 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Tim Rightnour
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32/*
33 * This is a set of general routines that most PReP-similar machines have
34 * in common.  Machines that use these routines do not have to be fully
35 * PReP compliant, the only requirement is that they use a PReP memory map.
36 * IE, io at 0x80000000 and mem at 0xc0000000.
37 */
38
39#include <sys/cdefs.h>
40__KERNEL_RCSID(0, "$NetBSD: prep_machdep.c,v 1.5 2008/11/30 18:21:35 martin Exp $");
41
42#include <sys/param.h>
43#include <sys/extent.h>
44#include <sys/kernel.h>
45#include <sys/malloc.h>
46#include <sys/reboot.h>
47#include <sys/ksyms.h>
48
49#include <uvm/uvm_extern.h>
50#include <machine/powerpc.h>
51#include <machine/bus.h>
52#include <machine/pmap.h>
53#include <powerpc/oea/bat.h>
54
55#include "opt_ddb.h"
56#ifdef DDB
57#include <machine/db_machdep.h>
58#include <ddb/db_extern.h>
59#endif
60
61#include "ksyms.h"
62
63#if NKSYMS || defined(DDB) || defined(MODULAR)
64extern void *endsym, *startsym;
65#endif
66extern struct mem_region physmemr[2], availmemr[2];
67
68struct powerpc_bus_space prep_io_space_tag = {
69	.pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_IO_TYPE,
70	.pbs_offset = PREP_BUS_SPACE_IO,
71	.pbs_base = 0x00000000,
72	.pbs_limit = PREP_PHYS_SIZE_IO,
73};
74
75struct powerpc_bus_space genppc_isa_io_space_tag = {
76	.pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_IO_TYPE,
77	.pbs_offset = PREP_BUS_SPACE_IO,
78	.pbs_base = 0x00000000,
79	.pbs_limit = PREP_ISA_SIZE_IO,
80};
81
82struct powerpc_bus_space prep_mem_space_tag = {
83	.pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_MEM_TYPE,
84	.pbs_offset = PREP_BUS_SPACE_MEM,
85	.pbs_base = 0x00000000,
86	.pbs_limit = PREP_PHYS_SIZE_MEM,
87};
88
89struct powerpc_bus_space genppc_isa_mem_space_tag = {
90	.pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_MEM_TYPE,
91	.pbs_offset = PREP_BUS_SPACE_MEM,
92	.pbs_base = 0x00000000,
93	.pbs_limit = PREP_ISA_SIZE_MEM,
94};
95
96static char ex_storage[2][EXTENT_FIXED_STORAGE_SIZE(8)]
97	__attribute__((aligned(8)));
98
99void
100prep_bus_space_init(void)
101{
102	int error;
103
104	error = bus_space_init(&prep_io_space_tag, "ioport",
105	    ex_storage[0], sizeof(ex_storage[0]));
106	if (error)
107		panic("prep_bus_space_init: can't init io tag");
108
109	error = extent_alloc_region(prep_io_space_tag.pbs_extent,
110	    PREP_PHYS_RESVD_START_IO, PREP_PHYS_RESVD_SIZE_IO, EX_NOWAIT);
111	if (error)
112		panic("prep_bus_space_init: can't block out reserved I/O"
113		    " space 0x10000-0x7fffff: error=%d", error);
114
115	error = bus_space_init(&prep_mem_space_tag, "iomem",
116	    ex_storage[1], sizeof(ex_storage[1]));
117	if (error)
118		panic("prep_bus_space_init: can't init mem tag");
119
120	genppc_isa_io_space_tag.pbs_extent = prep_io_space_tag.pbs_extent;
121	error = bus_space_init(&genppc_isa_io_space_tag, "isa-ioport", NULL, 0);	if (error)
122		panic("prep_bus_space_init: can't init isa io tag");
123
124	genppc_isa_mem_space_tag.pbs_extent = prep_mem_space_tag.pbs_extent;
125	error = bus_space_init(&genppc_isa_mem_space_tag, "isa-iomem", NULL, 0);
126	if (error)
127		panic("prep_bus_space_init: can't init isa mem tag");
128}
129
130/*
131 * just a few calls used in initppc() all in one place so everything gets
132 * done the same across the ports
133 */
134
135void
136prep_initppc(u_long startkernel, u_long endkernel, u_int args)
137{
138
139	/*
140	 * Now setup fixed bat registers
141	 * We setup the memory BAT, the IO space BAT, and a special
142	 * BAT for certain machines that have rs6k style PCI bridges
143	 * (only on port-prep)
144	 */
145	oea_batinit(
146	    PREP_BUS_SPACE_MEM, BAT_BL_256M,
147	    PREP_BUS_SPACE_IO,  BAT_BL_256M,
148#ifdef prep
149	    0xbf800000, BAT_BL_8M,
150#endif
151	    0);
152
153	/* Install vectors and interrupt handler. */
154	oea_init(NULL);
155
156	/* Initialize bus_space. */
157	prep_bus_space_init();
158
159	/* Initialize the console asap. */
160	consinit();
161
162	/* Set the page size */
163	uvm_setpagesize();
164
165	/* Initialize pmap module */
166	pmap_bootstrap(startkernel, endkernel);
167
168#if NKSYMS || defined(DDB) || defined(MODULAR)
169	ksyms_addsyms_elf((int)((u_long)endsym - (u_long)startsym), startsym, endsym);
170#endif
171
172#ifdef DDB
173	boothowto = args;
174	if (boothowto & RB_KDB)
175		Debugger();
176#endif
177}
178
179void
180mem_regions(struct mem_region **mem, struct mem_region **avail)
181{
182
183	*mem = physmemr;
184	*avail = availmemr;
185}
186