main.c revision 344290 
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 344290 2019-02-19 18:48:17Z 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[];
41
42uint32_t	acells, scells;
43
44static char bootargs[128];
45
46#define	HEAP_SIZE	0x800000
47static char heap[HEAP_SIZE]; // In BSS, so uses no space
48
49#define OF_puts(fd, text) OF_write(fd, text, strlen(text))
50
51static __inline register_t
52mfmsr(void)
53{
54	register_t value;
55
56	__asm __volatile ("mfmsr %0" : "=r"(value));
57
58	return (value);
59}
60
61void
62init_heap(void)
63{
64	bzero(heap, HEAP_SIZE);
65
66	setheap(heap, (void *)((int)heap + HEAP_SIZE));
67}
68
69uint64_t
70memsize(void)
71{
72	phandle_t	memoryp;
73	cell_t		reg[24];
74	int		i, sz;
75	uint64_t	memsz;
76
77	memsz = 0;
78	memoryp = OF_instance_to_package(memory);
79
80	sz = OF_getprop(memoryp, "reg", &reg, sizeof(reg));
81	sz /= sizeof(reg[0]);
82
83	for (i = 0; i < sz; i += (acells + scells)) {
84		if (scells > 1)
85			memsz += (uint64_t)reg[i + acells] << 32;
86		memsz += reg[i + acells + scells - 1];
87	}
88
89	return (memsz);
90}
91
92int
93main(int (*openfirm)(void *))
94{
95	phandle_t	root;
96	int		i;
97	char		bootpath[64];
98	char		*ch;
99	int		bargc;
100	char		**bargv;
101
102	/*
103	 * Initialise the Open Firmware routines by giving them the entry point.
104	 */
105	OF_init(openfirm);
106
107	root = OF_finddevice("/");
108
109	scells = acells = 1;
110	OF_getprop(root, "#address-cells", &acells, sizeof(acells));
111	OF_getprop(root, "#size-cells", &scells, sizeof(scells));
112
113	/*
114	 * Initialise the heap as early as possible.  Once this is done,
115	 * alloc() is usable. The stack is buried inside us, so this is
116	 * safe.
117	 */
118	init_heap();
119
120	/*
121         * Set up console.
122         */
123	cons_probe();
124
125	/*
126	 * March through the device switch probing for things.
127	 */
128	for (i = 0; devsw[i] != NULL; i++)
129		if (devsw[i]->dv_init != NULL)
130			(devsw[i]->dv_init)();
131
132	printf("\n%s", bootprog_info);
133	printf("Memory: %lldKB\n", memsize() / 1024);
134
135	OF_getprop(chosen, "bootpath", bootpath, 64);
136	ch = strchr(bootpath, ':');
137	*ch = '\0';
138	printf("Booted from: %s\n", bootpath);
139
140	printf("\n");
141
142	/*
143	 * Only parse the first bootarg if present. It should
144	 * be simple to handle extra arguments
145	 */
146	OF_getprop(chosen, "bootargs", bootargs, sizeof(bootargs));
147	bargc = 0;
148	parse(&bargc, &bargv, bootargs);
149	if (bargc == 1)
150		env_setenv("currdev", EV_VOLATILE, bargv[0], ofw_setcurrdev,
151		    env_nounset);
152	else
153		env_setenv("currdev", EV_VOLATILE, bootpath,
154			   ofw_setcurrdev, env_nounset);
155	env_setenv("loaddev", EV_VOLATILE, bootpath, env_noset,
156	    env_nounset);
157	setenv("LINES", "24", 1);		/* optional */
158
159	/*
160	 * On non-Apple hardware, where it works reliably, pass flattened
161	 * device trees to the kernel by default instead of OF CI pointers.
162	 * Apple hardware is the only virtual-mode OF implementation in
163	 * existence, so far as I am aware, so use that as a flag.
164	 */
165	if (!(mfmsr() & PSL_DR))
166		setenv("usefdt", "1", 1);
167
168	archsw.arch_getdev = ofw_getdev;
169	archsw.arch_copyin = ofw_copyin;
170	archsw.arch_copyout = ofw_copyout;
171	archsw.arch_readin = ofw_readin;
172	archsw.arch_autoload = ofw_autoload;
173
174	interact();				/* doesn't return */
175
176	OF_exit();
177
178	return 0;
179}
180
181COMMAND_SET(halt, "halt", "halt the system", command_halt);
182
183static int
184command_halt(int argc, char *argv[])
185{
186
187	OF_exit();
188	return (CMD_OK);
189}
190
191COMMAND_SET(memmap, "memmap", "print memory map", command_memmap);
192
193int
194command_memmap(int argc, char **argv)
195{
196
197	ofw_memmap(acells);
198	return (CMD_OK);
199}
200