main.c revision 332154 
1/*-
2 * Copyright (c) 2000 Benno Rice <benno@jeamland.net>
3 * Copyright (c) 2000 Stephane Potvin <sepotvin@videotron.ca>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <sys/cdefs.h>
29__FBSDID("$FreeBSD: stable/11/stand/powerpc/ofw/main.c 332154 2018-04-06 21:37:25Z kevans $");
30
31#include <stand.h>
32#include "openfirm.h"
33#include "libofw.h"
34#include "bootstrap.h"
35
36#include <machine/psl.h>
37
38struct arch_switch	archsw;		/* MI/MD interface boundary */
39
40extern char end[];
41extern char bootprog_info[];
42
43uint32_t	acells, scells;
44
45static char bootargs[128];
46
47#define	HEAP_SIZE	0x800000
48static char heap[HEAP_SIZE]; // In BSS, so uses no space
49
50#define OF_puts(fd, text) OF_write(fd, text, strlen(text))
51
52static __inline register_t
53mfmsr(void)
54{
55	register_t value;
56
57	__asm __volatile ("mfmsr %0" : "=r"(value));
58
59	return (value);
60}
61
62void
63init_heap(void)
64{
65	bzero(heap, HEAP_SIZE);
66
67	setheap(heap, (void *)((int)heap + HEAP_SIZE));
68}
69
70uint64_t
71memsize(void)
72{
73	phandle_t	memoryp;
74	cell_t		reg[24];
75	int		i, sz;
76	uint64_t	memsz;
77
78	memsz = 0;
79	memoryp = OF_instance_to_package(memory);
80
81	sz = OF_getprop(memoryp, "reg", &reg, sizeof(reg));
82	sz /= sizeof(reg[0]);
83
84	for (i = 0; i < sz; i += (acells + scells)) {
85		if (scells > 1)
86			memsz += (uint64_t)reg[i + acells] << 32;
87		memsz += reg[i + acells + scells - 1];
88	}
89
90	return (memsz);
91}
92
93int
94main(int (*openfirm)(void *))
95{
96	phandle_t	root;
97	int		i;
98	char		bootpath[64];
99	char		*ch;
100	int		bargc;
101	char		**bargv;
102
103	/*
104	 * Initialise the Open Firmware routines by giving them the entry point.
105	 */
106	OF_init(openfirm);
107
108	root = OF_finddevice("/");
109
110	scells = acells = 1;
111	OF_getprop(root, "#address-cells", &acells, sizeof(acells));
112	OF_getprop(root, "#size-cells", &scells, sizeof(scells));
113
114	/*
115	 * Initialise the heap as early as possible.  Once this is done,
116	 * alloc() is usable. The stack is buried inside us, so this is
117	 * safe.
118	 */
119	init_heap();
120
121	/*
122         * Set up console.
123         */
124	cons_probe();
125
126	/*
127	 * March through the device switch probing for things.
128	 */
129	for (i = 0; devsw[i] != NULL; i++)
130		if (devsw[i]->dv_init != NULL)
131			(devsw[i]->dv_init)();
132
133	printf("\n%s", bootprog_info);
134	printf("Memory: %lldKB\n", memsize() / 1024);
135
136	OF_getprop(chosen, "bootpath", bootpath, 64);
137	ch = strchr(bootpath, ':');
138	*ch = '\0';
139	printf("Booted from: %s\n", bootpath);
140
141	printf("\n");
142
143	/*
144	 * Only parse the first bootarg if present. It should
145	 * be simple to handle extra arguments
146	 */
147	OF_getprop(chosen, "bootargs", bootargs, sizeof(bootargs));
148	bargc = 0;
149	parse(&bargc, &bargv, bootargs);
150	if (bargc == 1)
151		env_setenv("currdev", EV_VOLATILE, bargv[0], ofw_setcurrdev,
152		    env_nounset);
153	else
154		env_setenv("currdev", EV_VOLATILE, bootpath,
155			   ofw_setcurrdev, env_nounset);
156	env_setenv("loaddev", EV_VOLATILE, bootpath, env_noset,
157	    env_nounset);
158	setenv("LINES", "24", 1);		/* optional */
159
160	/*
161	 * On non-Apple hardware, where it works reliably, pass flattened
162	 * device trees to the kernel by default instead of OF CI pointers.
163	 * Apple hardware is the only virtual-mode OF implementation in
164	 * existence, so far as I am aware, so use that as a flag.
165	 */
166	if (!(mfmsr() & PSL_DR))
167		setenv("usefdt", "1", 1);
168
169	archsw.arch_getdev = ofw_getdev;
170	archsw.arch_copyin = ofw_copyin;
171	archsw.arch_copyout = ofw_copyout;
172	archsw.arch_readin = ofw_readin;
173	archsw.arch_autoload = ofw_autoload;
174
175	interact();				/* doesn't return */
176
177	OF_exit();
178
179	return 0;
180}
181
182COMMAND_SET(halt, "halt", "halt the system", command_halt);
183
184static int
185command_halt(int argc, char *argv[])
186{
187
188	OF_exit();
189	return (CMD_OK);
190}
191
192COMMAND_SET(memmap, "memmap", "print memory map", command_memmap);
193
194int
195command_memmap(int argc, char **argv)
196{
197
198	ofw_memmap(acells);
199	return (CMD_OK);
200}
201