2 * Copyright (C) 2000, 2001 Broadcom Corporation
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version 2
7 * of the License, or (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 #include <linux/config.h>
20 #include <linux/init.h>
21 #include <linux/kernel.h>
23 #include <linux/blkdev.h>
24 #include <linux/bootmem.h>
25 #include <linux/smp.h>
27 #include <asm/bootinfo.h>
28 #include <asm/reboot.h>
30 #ifdef CONFIG_EMBEDDED_RAMDISK
31 /* These are symbols defined by the ramdisk linker script */
32 extern unsigned char __rd_start
;
33 extern unsigned char __rd_end
;
36 #define MAX_RAM_SIZE ((CONFIG_SIBYTE_STANDALONE_RAM_SIZE * 1024 * 1024) - 1)
38 static __init
void prom_meminit(void)
40 #ifdef CONFIG_BLK_DEV_INITRD
41 unsigned long initrd_pstart
;
42 unsigned long initrd_pend
;
44 #ifdef CONFIG_EMBEDDED_RAMDISK
45 /* If we're using an embedded ramdisk, then __rd_start and __rd_end
46 are defined by the linker to be on either side of the ramdisk
47 area. Otherwise, initrd_start should be defined by kernel command
49 if (initrd_start
== 0) {
50 initrd_start
= (unsigned long)&__rd_start
;
51 initrd_end
= (unsigned long)&__rd_end
;
55 initrd_pstart
= __pa(initrd_start
);
56 initrd_pend
= __pa(initrd_end
);
58 ((initrd_pstart
> MAX_RAM_SIZE
)
59 || (initrd_pend
> MAX_RAM_SIZE
))) {
60 panic("initrd out of addressable memory");
63 add_memory_region(0, initrd_pstart
,
65 add_memory_region(initrd_pstart
, initrd_pend
- initrd_pstart
,
67 add_memory_region(initrd_pend
,
68 (CONFIG_SIBYTE_STANDALONE_RAM_SIZE
* 1024 * 1024) - initrd_pend
,
71 add_memory_region(0, CONFIG_SIBYTE_STANDALONE_RAM_SIZE
* 1024 * 1024,
76 void prom_cpu0_exit(void *unused
)
81 static void prom_linux_exit(void)
84 if (smp_processor_id()) {
85 smp_call_function(prom_cpu0_exit
,NULL
,1,1);
92 * prom_init is called just after the cpu type is determined, from setup_arch()
94 void __init
prom_init(void)
96 _machine_restart
= (void (*)(char *))prom_linux_exit
;
97 _machine_halt
= prom_linux_exit
;
98 _machine_power_off
= prom_linux_exit
;
100 strcpy(arcs_cmdline
, "root=/dev/ram0 ");
102 mips_machgroup
= MACH_GROUP_SIBYTE
;
106 unsigned long __init
prom_free_prom_memory(void)
108 /* Not sure what I'm supposed to do here. Nothing, I think */
112 void prom_putchar(char c
)