1 /*-
2 * Copyright (C) 2007 by Oleksandr Tymoshenko. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
17 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
19 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
21 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
22 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 *
25 * $Id: $
26 *
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
31
32 #include "opt_ddb.h"
33
34 #include <sys/param.h>
35 #include <sys/conf.h>
36 #include <sys/kernel.h>
37 #include <sys/systm.h>
38 #include <sys/imgact.h>
39 #include <sys/bio.h>
40 #include <sys/buf.h>
41 #include <sys/bus.h>
42 #include <sys/cpu.h>
43 #include <sys/cons.h>
44 #include <sys/exec.h>
45 #include <sys/ucontext.h>
46 #include <sys/proc.h>
47 #include <sys/kdb.h>
48 #include <sys/ptrace.h>
49 #include <sys/reboot.h>
50 #include <sys/signalvar.h>
51 #include <sys/sysent.h>
52 #include <sys/sysproto.h>
53 #include <sys/user.h>
54
55 #include <vm/vm.h>
56 #include <vm/vm_object.h>
57 #include <vm/vm_page.h>
58
59 #include <machine/cache.h>
60 #include <machine/clock.h>
61 #include <machine/cpu.h>
62 #include <machine/cpuinfo.h>
63 #include <machine/cpufunc.h>
64 #include <machine/cpuregs.h>
65 #include <machine/hwfunc.h>
66 #include <machine/intr_machdep.h>
67 #include <machine/locore.h>
68 #include <machine/md_var.h>
69 #include <machine/pte.h>
70 #include <machine/sigframe.h>
71 #include <machine/trap.h>
72 #include <machine/vmparam.h>
73
74 extern int *edata;
75 extern int *end;
76
77 void
platform_cpu_init()78 platform_cpu_init()
79 {
80 /* Nothing special */
81 }
82
83 void
platform_reset(void)84 platform_reset(void)
85 {
86 volatile unsigned int * p = (void *)0xb8008000;
87 /*
88 * TODO: we should take care of TLB stuff here. Otherwise
89 * board does not boots properly next time
90 */
91
92 /* Write 0x8000_0001 to the Reset register */
93 *p = 0x80000001;
94
95 __asm __volatile("li $25, 0xbfc00000");
96 __asm __volatile("j $25");
97 }
98
99 void
platform_start(__register_t a0,__register_t a1,__register_t a2 __unused,__register_t a3 __unused)100 platform_start(__register_t a0, __register_t a1,
101 __register_t a2 __unused, __register_t a3 __unused)
102 {
103 uint64_t platform_counter_freq;
104 vm_offset_t kernend;
105 int argc = a0;
106 char **argv = (char **)a1;
107 int i, mem;
108
109
110 /* clear the BSS and SBSS segments */
111 kernend = (vm_offset_t)&end;
112 memset(&edata, 0, kernend - (vm_offset_t)(&edata));
113
114 mips_postboot_fixup();
115
116 /* Initialize pcpu stuff */
117 mips_pcpu0_init();
118
119 /*
120 * Looking for mem=XXM argument
121 */
122 mem = 0; /* Just something to start with */
123 for (i=0; i < argc; i++) {
124 if (strncmp(argv[i], "mem=", 4) == 0) {
125 mem = strtol(argv[i] + 4, NULL, 0);
126 break;
127 }
128 }
129
130 bootverbose = 1;
131 if (mem > 0)
132 realmem = btoc(mem << 20);
133 else
134 realmem = btoc(32 << 20);
135
136 for (i = 0; i < 10; i++) {
137 phys_avail[i] = 0;
138 }
139
140 /* phys_avail regions are in bytes */
141 phys_avail[0] = MIPS_KSEG0_TO_PHYS(kernel_kseg0_end);
142 phys_avail[1] = ctob(realmem);
143
144 dump_avail[0] = phys_avail[0];
145 dump_avail[1] = phys_avail[1];
146
147 physmem = realmem;
148
149 /*
150 * ns8250 uart code uses DELAY so ticker should be inititalized
151 * before cninit. And tick_init_params refers to hz, so * init_param1
152 * should be called first.
153 */
154 init_param1();
155 /* TODO: parse argc,argv */
156 platform_counter_freq = 330000000UL;
157 mips_timer_init_params(platform_counter_freq, 1);
158 cninit();
159 /* Panic here, after cninit */
160 if (mem == 0)
161 panic("No mem=XX parameter in arguments");
162
163 printf("cmd line: ");
164 for (i=0; i < argc; i++)
165 printf("%s ", argv[i]);
166 printf("\n");
167
168 init_param2(physmem);
169 mips_cpu_init();
170 pmap_bootstrap();
171 mips_proc0_init();
172 mutex_init();
173 kdb_init();
174 #ifdef KDB
175 if (boothowto & RB_KDB)
176 kdb_enter(KDB_WHY_BOOTFLAGS, "Boot flags requested debugger");
177 #endif
178 }
179