1 /* $NetBSD: prep_machdep.c,v 1.13 2021/02/27 01:31:23 thorpej 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 1.13 2021/02/27 01:31:23 thorpej Exp $");
41
42 #include "ksyms.h"
43
44 #ifdef _KERNEL_OPT
45 #include "opt_ddb.h"
46 #include "opt_modular.h"
47 #endif
48
49 #include <sys/param.h>
50 #include <sys/extent.h>
51 #include <sys/kernel.h>
52 #include <sys/reboot.h>
53 #include <sys/ksyms.h>
54
55 #include <uvm/uvm_extern.h>
56 #include <machine/powerpc.h>
57 #include <sys/bus.h>
58 #include <machine/pmap.h>
59 #include <powerpc/oea/bat.h>
60
61 #ifdef DDB
62 #include <machine/db_machdep.h>
63 #include <ddb/db_extern.h>
64 #endif
65
66 #if NKSYMS || defined(DDB) || defined(MODULAR)
67 extern void *endsym, *startsym;
68 #endif
69 extern struct mem_region physmemr[2], availmemr[2];
70
71 struct powerpc_bus_space prep_io_space_tag = {
72 .pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_IO_TYPE,
73 .pbs_offset = PREP_BUS_SPACE_IO,
74 .pbs_base = 0x00000000,
75 .pbs_limit = PREP_PHYS_SIZE_IO,
76 };
77
78 struct powerpc_bus_space genppc_isa_io_space_tag = {
79 .pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_IO_TYPE,
80 .pbs_offset = PREP_BUS_SPACE_IO,
81 .pbs_base = 0x00000000,
82 .pbs_limit = PREP_ISA_SIZE_IO,
83 };
84
85 struct powerpc_bus_space prep_mem_space_tag = {
86 .pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_MEM_TYPE,
87 .pbs_offset = PREP_BUS_SPACE_MEM,
88 .pbs_base = 0x00000000,
89 .pbs_limit = PREP_PHYS_SIZE_MEM,
90 };
91
92 struct powerpc_bus_space genppc_isa_mem_space_tag = {
93 .pbs_flags = _BUS_SPACE_LITTLE_ENDIAN|_BUS_SPACE_MEM_TYPE,
94 .pbs_offset = PREP_BUS_SPACE_MEM,
95 .pbs_base = 0x00000000,
96 .pbs_limit = PREP_ISA_SIZE_MEM,
97 };
98
99 static char ex_storage[2][EXTENT_FIXED_STORAGE_SIZE(8)]
100 __attribute__((aligned(8)));
101
102 void
prep_bus_space_init(void)103 prep_bus_space_init(void)
104 {
105 int error;
106
107 error = bus_space_init(&prep_io_space_tag, "ioport",
108 ex_storage[0], sizeof(ex_storage[0]));
109 if (error)
110 panic("prep_bus_space_init: can't init io tag");
111
112 error = extent_alloc_region(prep_io_space_tag.pbs_extent,
113 PREP_PHYS_RESVD_START_IO, PREP_PHYS_RESVD_SIZE_IO, EX_NOWAIT);
114 if (error)
115 panic("prep_bus_space_init: can't block out reserved I/O"
116 " space 0x10000-0x7fffff: error=%d", error);
117
118 error = bus_space_init(&prep_mem_space_tag, "iomem",
119 ex_storage[1], sizeof(ex_storage[1]));
120 if (error)
121 panic("prep_bus_space_init: can't init mem tag");
122
123 genppc_isa_io_space_tag.pbs_extent = prep_io_space_tag.pbs_extent;
124 error = bus_space_init(&genppc_isa_io_space_tag, "isa-ioport", NULL, 0); if (error)
125 panic("prep_bus_space_init: can't init isa io tag");
126
127 genppc_isa_mem_space_tag.pbs_extent = prep_mem_space_tag.pbs_extent;
128 error = bus_space_init(&genppc_isa_mem_space_tag, "isa-iomem", NULL, 0);
129 if (error)
130 panic("prep_bus_space_init: can't init isa mem tag");
131 }
132
133 /*
134 * just a few calls used in initppc() all in one place so everything gets
135 * done the same across the ports
136 */
137
138 void
prep_initppc(u_long startkernel,u_long endkernel,u_int args,paddr_t pa,...)139 prep_initppc(u_long startkernel, u_long endkernel, u_int args, paddr_t pa, ...)
140 {
141 va_list ap;
142
143 /*
144 * Set up fixed BAT registers. We map the PReP IO and MEM
145 * space, plus any additional regions the platform wants.
146 */
147 oea_batinit(
148 PREP_BUS_SPACE_MEM, BAT_BL_256M,
149 PREP_BUS_SPACE_IO, BAT_BL_256M,
150 0);
151
152 va_start(ap, pa);
153 while (pa != 0) {
154 register_t len = va_arg(ap, register_t);
155 oea_iobat_add(pa, len);
156 pa = va_arg(ap, paddr_t);
157 }
158 va_end(ap);
159
160 /* Install vectors and interrupt handler. */
161 oea_init(NULL);
162
163 /* Initialize bus_space. */
164 prep_bus_space_init();
165
166 /* Initialize the console asap. */
167 consinit();
168
169 /* Set the page size */
170 uvm_md_init();
171
172 /* Initialize pmap module */
173 pmap_bootstrap(startkernel, endkernel);
174
175 #if NKSYMS || defined(DDB) || defined(MODULAR)
176 ksyms_addsyms_elf((int)((u_long)endsym - (u_long)startsym), startsym, endsym);
177 #endif
178
179 #ifdef DDB
180 boothowto = args;
181 if (boothowto & RB_KDB)
182 Debugger();
183 #endif
184 }
185
186 void
mem_regions(struct mem_region ** mem,struct mem_region ** avail)187 mem_regions(struct mem_region **mem, struct mem_region **avail)
188 {
189
190 *mem = physmemr;
191 *avail = availmemr;
192 }
193