aboutsummaryrefslogtreecommitdiffstats
path: root/arch/mips/sibyte/sb1250/prom.c
blob: 742043f8d755626f7f42afc3b5c5d864ac983f2c (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
/*
 * Copyright (C) 2000, 2001 Broadcom Corporation
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#include <linux/config.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/blkdev.h>
#include <linux/bootmem.h>
#include <linux/smp.h>
#include <linux/initrd.h>
#include <linux/pm.h>

#include <asm/bootinfo.h>
#include <asm/reboot.h>

#define MAX_RAM_SIZE ((CONFIG_SIBYTE_STANDALONE_RAM_SIZE * 1024 * 1024) - 1)

static __init void prom_meminit(void)
{
#ifdef CONFIG_BLK_DEV_INITRD
	unsigned long initrd_pstart;
	unsigned long initrd_pend;

	initrd_pstart = __pa(initrd_start);
	initrd_pend = __pa(initrd_end);
	if (initrd_start &&
	    ((initrd_pstart > MAX_RAM_SIZE)
	     || (initrd_pend > MAX_RAM_SIZE))) {
		panic("initrd out of addressable memory");
	}

	add_memory_region(0, initrd_pstart,
			  BOOT_MEM_RAM);
	add_memory_region(initrd_pstart, initrd_pend - initrd_pstart,
			  BOOT_MEM_RESERVED);
	add_memory_region(initrd_pend,
			  (CONFIG_SIBYTE_STANDALONE_RAM_SIZE * 1024 * 1024) - initrd_pend,
			  BOOT_MEM_RAM);
#else
	add_memory_region(0, CONFIG_SIBYTE_STANDALONE_RAM_SIZE * 1024 * 1024,
			  BOOT_MEM_RAM);
#endif
}

void prom_cpu0_exit(void *unused)
{
        while (1) ;
}

static void prom_linux_exit(void)
{
#ifdef CONFIG_SMP
	if (smp_processor_id()) {
		smp_call_function(prom_cpu0_exit,NULL,1,1);
	}
#endif
	while(1);
}

/*
 * prom_init is called just after the cpu type is determined, from setup_arch()
 */
void __init prom_init(void)
{
	_machine_restart   = (void (*)(char *))prom_linux_exit;
	_machine_halt      = prom_linux_exit;
	pm_power_off = prom_linux_exit;

	strcpy(arcs_cmdline, "root=/dev/ram0 ");

	mips_machgroup = MACH_GROUP_SIBYTE;
	prom_meminit();
}

unsigned long __init prom_free_prom_memory(void)
{
	/* Not sure what I'm supposed to do here.  Nothing, I think */
	return 0;
}

void prom_putchar(char c)
{
}