idt_machdep.c revision 178173 
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: head/sys/mips/mips32/idt/idt_machdep.c 178173 2008-04-13 07:44:55Z imp $");
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#include <vm/vm_pager.h>
59
60#include <machine/cache.h>
61#include <machine/clock.h>
62#include <machine/cpu.h>
63#include <machine/cpuinfo.h>
64#include <machine/cpufunc.h>
65#include <machine/cpuregs.h>
66#include <machine/hwfunc.h>
67#include <machine/intr_machdep.h>
68#include <machine/locore.h>
69#include <machine/md_var.h>
70#include <machine/pte.h>
71#include <machine/sigframe.h>
72#include <machine/trap.h>
73#include <machine/vmparam.h>
74
75extern int	*edata;
76extern int	*end;
77
78void
79platform_halt(void)
80{
81
82}
83
84
85void
86platform_identify(void)
87{
88
89}
90
91void
92platform_reset(void)
93{
94	volatile unsigned int * p = (void *)0xb8008000;
95	/*
96	 * TODO: we should take care of TLB stuff here. Otherwise
97	 * board does not boots properly next time
98	 */
99
100	/* Write 0x8000_0001 to the Reset register */
101	*p = 0x80000001;
102
103	__asm __volatile("li	$25, 0xbfc00000");
104	__asm __volatile("j	$25");
105}
106
107void
108platform_trap_enter(void)
109{
110
111}
112
113void
114platform_trap_exit(void)
115{
116
117}
118
119void
120platform_start(__register_t a0, __register_t a1,
121    __register_t a2 __unused, __register_t a3 __unused)
122{
123	uint64_t platform_counter_freq;
124	vm_offset_t kernend;
125	int argc = a0;
126	char **argv = (char **)a1;
127	int i, mem;
128
129
130	/* clear the BSS and SBSS segments */
131	kernend = round_page((vm_offset_t)&end);
132	memset(&edata, 0, kernend - (vm_offset_t)(&edata));
133
134	/*
135	 * Looking for mem=XXM argument
136	 */
137	mem = 0; /* Just something to start with */
138	for (i=0; i < argc; i++) {
139		if (strncmp(argv[i], "mem=", 4) == 0) {
140			mem = strtol(argv[i] + 4, NULL, 0);
141			break;
142		}
143	}
144
145	bootverbose = 1;
146	if (mem > 0)
147		realmem = btoc(mem << 20);
148	else
149		realmem = btoc(32 << 20);
150
151	for (i = 0; i < 10; i++) {
152		phys_avail[i] = 0;
153	}
154
155	/* phys_avail regions are in bytes */
156	phys_avail[0] = MIPS_KSEG0_TO_PHYS((vm_offset_t)&end);
157	phys_avail[1] = ctob(realmem);
158
159	physmem = realmem;
160
161	/*
162	 * ns8250 uart code uses DELAY so ticker should be inititalized
163	 * before cninit. And tick_init_params refers to hz, so * init_param1
164	 * should be called first.
165	 */
166	init_param1();
167	/* TODO: parse argc,argv */
168	platform_counter_freq = 330000000UL;
169	mips_timer_init_params(platform_counter_freq, 1);
170	cninit();
171	/* Panic here, after cninit */
172	if (mem == 0)
173		panic("No mem=XX parameter in arguments");
174
175	printf("cmd line: ");
176	for (i=0; i < argc; i++)
177		printf("%s ", argv[i]);
178	printf("\n");
179
180	init_param2(physmem);
181	mips_cpu_init();
182	pmap_bootstrap();
183	mips_proc0_init();
184	mutex_init();
185#ifdef DDB
186	kdb_init();
187#endif
188}
189