1 /* $NetBSD: machdep.c,v 1.36 2024/03/05 14:15:34 thorpej Exp $ */
2
3 /*-
4 * Copyright (c) 2001 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.36 2024/03/05 14:15:34 thorpej Exp $");
31
32 #include "opt_ddb.h"
33 #include "opt_kloader.h"
34 #include "opt_kloader_kernel_path.h"
35
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/kernel.h>
39 #include <sys/buf.h>
40 #include <sys/reboot.h>
41 #include <sys/mount.h>
42 #include <sys/kcore.h>
43 #include <sys/boot_flag.h>
44 #include <sys/device.h>
45
46 #include <uvm/uvm.h>
47 #include <uvm/uvm_extern.h>
48
49 #ifdef DDB
50 #include <machine/db_machdep.h>
51 #include <ddb/db_sym.h>
52 #include <ddb/db_extern.h>
53 #include <sys/exec_elf.h>
54 #endif
55
56 #include <dev/cons.h> /* cntab access (cpu_reboot) */
57 #include <machine/bootinfo.h>
58 #include <machine/locore.h>
59 #include <machine/psl.h>
60 #include <machine/intr.h>/* hardintr_init */
61 #include <playstation2/playstation2/sifbios.h>
62 #include <playstation2/playstation2/interrupt.h>
63
64 #if defined KLOADER_KERNEL_PATH && !defined KLOADER
65 #error "define KLOADER"
66 #endif
67 #ifdef KLOADER
68 #include <machine/kloader.h>
69 #endif
70
71 struct cpu_info cpu_info_store;
72
73 struct vm_map *phys_map;
74 phys_ram_seg_t mem_clusters[VM_PHYSSEG_MAX];
75 int mem_cluster_cnt;
76
77 #ifdef DEBUG
78 static void bootinfo_dump(void);
79 #endif
80
81 void mach_init(void);
82 /*
83 * Do all the stuff that locore normally does before calling main().
84 */
85 void
mach_init(void)86 mach_init(void)
87 {
88 extern char kernel_text[], edata[], end[];
89 char *kernend;
90 struct pcb *pcb0;
91 vaddr_t v;
92 paddr_t start;
93 size_t size;
94
95 /*
96 * Clear the BSS segment.
97 */
98 kernend = (void *)mips_round_page(end);
99 memset(edata, 0, kernend - edata);
100
101 /* disable all interrupt */
102 interrupt_init_bootstrap();
103
104 /* enable SIF BIOS */
105 sifbios_init();
106
107 consinit();
108
109 printf("kernel_text=%p edata=%p end=%p\n", kernel_text, edata, end);
110
111 #ifdef DEBUG
112 bootinfo_dump();
113 #endif
114 uvm_md_init();
115
116 physmem = atop(PS2_MEMORY_SIZE);
117
118 /*
119 * Copy exception-dispatch code down to exception vector.
120 * Initialize locore-function vector.
121 * Clear out the I and D caches.
122 */
123 mips_vector_init(NULL, false);
124
125 /*
126 * Load the rest of the available pages into the VM system.
127 */
128 start = (paddr_t)round_page(MIPS_KSEG0_TO_PHYS(kernend));
129 size = PS2_MEMORY_SIZE - start - BOOTINFO_BLOCK_SIZE;
130 memset((void *)MIPS_PHYS_TO_KSEG1(start), 0, size);
131
132 /* kernel itself */
133 mem_clusters[0].start = trunc_page(MIPS_KSEG0_TO_PHYS(kernel_text));
134 mem_clusters[0].size = start - mem_clusters[0].start;
135 /* heap */
136 mem_clusters[1].start = start;
137 mem_clusters[1].size = size;
138 /* load */
139 printf("load memory %#x, %#lx\n", start, size);
140 uvm_page_physload(atop(start), atop(start + size),
141 atop(start), atop(start + size), VM_FREELIST_DEFAULT);
142
143 /*
144 * Initialize error message buffer (at end of core).
145 */
146 mips_init_msgbuf();
147
148 pmap_bootstrap();
149
150 /*
151 * Allocate uarea page for lwp0 and set it.
152 */
153 v = uvm_pageboot_alloc(USPACE);
154
155 pcb0 = lwp_getpcb(&lwp0);
156 pcb0->pcb_context.val[_L_SR] = PSL_LOWIPL; /* SR */
157 #ifdef IPL_ICU_MASK
158 pcb0->pcb_ppl = 0;
159 #endif
160
161 lwp0.l_md.md_utf = (struct trapframe *)(v + USPACE) - 1;
162 }
163
164 /*
165 * Allocate memory for variable-sized tables,
166 */
167 void
cpu_startup(void)168 cpu_startup(void)
169 {
170 cpu_startup_common();
171 }
172
173 void
cpu_reboot(int howto,char * bootstr)174 cpu_reboot(int howto, char *bootstr)
175 {
176 #ifdef KLOADER
177 struct kloader_bootinfo kbi;
178 #endif
179 static int waittime = -1;
180
181 /* Take a snapshot before clobbering any registers. */
182 if (curlwp)
183 savectx(curpcb);
184
185 if (cold) {
186 howto |= RB_HALT;
187 goto haltsys;
188 }
189
190 /* If "always halt" was specified as a boot flag, obey. */
191 if (boothowto & RB_HALT) {
192 howto |= RB_HALT;
193 }
194
195 #ifdef KLOADER
196 /* No bootinfo is required. */
197 kloader_bootinfo_set(&kbi, 0, NULL, NULL, true);
198 #ifndef KLOADER_KERNEL_PATH
199 #define KLOADER_KERNEL_PATH "/netbsd"
200 #endif
201 if ((howto & RB_HALT) == 0)
202 kloader_reboot_setup(KLOADER_KERNEL_PATH);
203 #endif
204
205 boothowto = howto;
206 if ((howto & RB_NOSYNC) == 0 && (waittime < 0)) {
207 waittime = 0;
208 vfs_shutdown();
209 }
210
211 splhigh();
212
213 if (howto & RB_DUMP)
214 dumpsys();
215
216 haltsys:
217 doshutdownhooks();
218
219 pmf_system_shutdown(boothowto);
220
221 if ((howto & RB_POWERDOWN) == RB_POWERDOWN)
222 sifbios_halt(0); /* power down */
223 else if (howto & RB_HALT)
224 sifbios_halt(1); /* halt */
225 else {
226 #ifdef KLOADER
227 kloader_reboot();
228 /* NOTREACHED */
229 #endif
230 sifbios_halt(2); /* reset */
231 }
232
233 while (1)
234 ;
235 /* NOTREACHED */
236 }
237
238 #ifdef DEBUG
239 void
bootinfo_dump(void)240 bootinfo_dump(void)
241 {
242 printf("devconf=%#x, option=%#x, rtc=%#x, pcmcia_type=%#x,"
243 "sysconf=%#x\n",
244 BOOTINFO_REF(BOOTINFO_DEVCONF),
245 BOOTINFO_REF(BOOTINFO_OPTION_PTR),
246 BOOTINFO_REF(BOOTINFO_RTC),
247 BOOTINFO_REF(BOOTINFO_PCMCIA_TYPE),
248 BOOTINFO_REF(BOOTINFO_SYSCONF));
249 }
250 #endif /* DEBUG */
251