1 /* $NetBSD: machdep.c,v 1.31 2023/12/20 14:18:37 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 2006 Jachym Holecek
5 * All rights reserved.
6 *
7 * Written for DFC Design, s.r.o.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 /*
33 * Based on Walnut and Explora.
34 */
35
36 #include <sys/cdefs.h>
37 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.31 2023/12/20 14:18:37 thorpej Exp $");
38
39 #include "opt_compat_netbsd.h"
40 #include "opt_ddb.h"
41 #include "opt_virtex.h"
42 #include "opt_kgdb.h"
43
44 #include <sys/param.h>
45 #include <sys/boot_flag.h>
46 #include <sys/buf.h>
47 #include <sys/bus.h>
48 #include <sys/device.h>
49 #include <sys/exec.h>
50 #include <sys/mbuf.h>
51 #include <sys/module.h>
52 #include <sys/mount.h>
53 #include <sys/msgbuf.h>
54 #include <sys/kernel.h>
55 #include <sys/ksyms.h>
56 #include <sys/proc.h>
57 #include <sys/reboot.h>
58 #include <sys/syscallargs.h>
59 #include <sys/syslog.h>
60 #include <sys/systm.h>
61
62 #include <uvm/uvm_extern.h>
63
64 #include <dev/cons.h>
65
66 #include <machine/powerpc.h>
67
68 #include <powerpc/trap.h>
69 #include <powerpc/pcb.h>
70
71 #include <powerpc/spr.h>
72 #include <powerpc/ibm4xx/spr.h>
73
74 #include <powerpc/ibm4xx/cpu.h>
75
76 #include <evbppc/virtex/dcr.h>
77 #include <evbppc/virtex/virtex.h>
78
79 #include "ksyms.h"
80
81 #if defined(DDB)
82 #include <powerpc/db_machdep.h>
83 #include <ddb/db_extern.h>
84 #endif
85
86 #if defined(KGDB)
87 #include <sys/kgdb.h>
88 #endif
89
90 void initppc(vaddr_t, vaddr_t);
91
92 /* BSS segment start & end. */
93 extern char edata[], end[];
94
95 /* One region holds all memory, the other is terminator expected by 405 pmap. */
96 #define MEMREGIONS 2
97 struct mem_region physmemr[MEMREGIONS];
98 struct mem_region availmemr[MEMREGIONS];
99
100 /* Maximum TLB page size. */
101 #define TLB_PG_SIZE (16*1024*1024)
102
103 void
initppc(vaddr_t startkernel,vaddr_t endkernel)104 initppc(vaddr_t startkernel, vaddr_t endkernel)
105 {
106 paddr_t addr, memsize;
107
108 /* Initialize cache info for memcpy, memset, etc. */
109 cpu_probe_cache();
110
111 memset(physmemr, 0, sizeof(physmemr)); /* [1].size = 0 */
112 memset(availmemr, 0, sizeof(availmemr)); /* [1].size = 0 */
113
114 memsize = (PHYSMEM * 1024 * 1024) & ~PGOFSET;
115
116 physmemr[0].start = 0;
117 physmemr[0].size = memsize;
118
119 availmemr[0].start = startkernel;
120 availmemr[0].size = memsize - availmemr[0].start;
121
122 /* Map kernel memory linearly. */
123 for (addr = 0; addr < endkernel; addr += TLB_PG_SIZE)
124 ppc4xx_tlb_reserve(addr, addr, TLB_PG_SIZE, TLB_EX);
125
126 /* Give design-specific code a hint for reserved mappings. */
127 virtex_machdep_init(roundup(memsize, TLB_PG_SIZE), TLB_PG_SIZE,
128 physmemr, availmemr);
129
130 ibm4xx_init(startkernel, endkernel, pic_ext_intr);
131
132 #ifdef DDB
133 if (boothowto & RB_KDB)
134 Debugger();
135 #endif
136
137 #ifdef KGDB
138 /*
139 * Now trap to KGDB
140 */
141 kgdb_connect(1);
142 #endif /* KGDB */
143 }
144
145 /*
146 * Machine dependent startup code.
147 */
148
149 void
cpu_startup(void)150 cpu_startup(void)
151 {
152 /* For use by propdb. */
153 static u_int memsize = PHYSMEM * 1024 * 1024;
154 static u_int cpuspeed = CPUFREQ * 1000 * 1000;
155 prop_number_t pn;
156
157 vaddr_t minaddr, maxaddr;
158 char pbuf[9];
159
160 curcpu()->ci_khz = cpuspeed / 1000;
161
162 /* Initialize error message buffer. */
163 initmsgbuf((void *)msgbuf, round_page(MSGBUFSIZE));
164
165 printf("%s%s", copyright, version);
166
167 format_bytes(pbuf, sizeof(pbuf), ctob(physmem));
168 printf("total memory = %s\n", pbuf);
169
170 minaddr = 0;
171 /*
172 * Allocate a submap for physio
173 */
174 phys_map = uvm_km_suballoc(kernel_map, &minaddr, &maxaddr,
175 VM_PHYS_SIZE, 0, false, NULL);
176
177 /*
178 * No need to allocate an mbuf cluster submap. Mbuf clusters
179 * are allocated via the pool allocator, and we use direct-mapped
180 * pool pages.
181 */
182
183 format_bytes(pbuf, sizeof(pbuf), ptoa(uvm_availmem(false)));
184 printf("avail memory = %s\n", pbuf);
185
186 /*
187 * Set up the board properties database.
188 */
189 board_info_init();
190
191 pn = prop_number_create_integer(memsize);
192 KASSERT(pn != NULL);
193 if (prop_dictionary_set(board_properties, "mem-size", pn) == false)
194 panic("setting mem-size");
195 prop_object_release(pn);
196
197 pn = prop_number_create_integer(cpuspeed);
198 KASSERT(pn != NULL);
199 if (prop_dictionary_set(board_properties, "processor-frequency",
200 pn) == false)
201 panic("setting processor-frequency");
202 prop_object_release(pn);
203
204 /*
205 * Now that we have VM, malloc()s are OK in bus_space.
206 */
207 bus_space_mallocok();
208 fake_mapiodev = 0;
209 }
210
211 /* Hook used by 405 pmap module. */
212 void
mem_regions(struct mem_region ** mem,struct mem_region ** avail)213 mem_regions(struct mem_region **mem, struct mem_region **avail)
214 {
215 *mem = physmemr;
216 *avail = availmemr;
217 }
218