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
74extern int	*edata;
75extern int	*end;
76
77void
78platform_cpu_init()
79{
80	/* Nothing special */
81}
82
83void
84platform_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
99void
100platform_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