2 * arch/mips/ifxmips/prom.c
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (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.
18 * Copyright (C) 2005 Wu Qi Ming infineon
20 * Rewrite of Infineon IFXMips code, thanks to infineon for the support,
21 * software and hardware
23 * Copyright (C) 2007 John Crispin <blogic@openwrt.org>
27 #include <linux/init.h>
28 #include <linux/bootmem.h>
29 #include <asm/bootinfo.h>
30 #include <asm/ifxmips/ifxmips.h>
33 static char buf
[1024];
34 u32
*prom_cp1_base
= NULL
;
35 u32 prom_cp1_size
= 0;
38 prom_free_prom_memory(void)
45 while((ifxmips_r32(IFXMIPS_ASC1_FSTAT
) & ASCFSTAT_TXFFLMASK
) >> ASCFSTAT_TXFFLOFF
);
48 ifxmips_w32('\r', IFXMIPS_ASC1_TBUF
);
49 ifxmips_w32(c
, IFXMIPS_ASC1_TBUF
);
53 prom_printf(const char * fmt
, ...)
60 l
= vsprintf(buf
, fmt
, args
);
64 for(p
= buf
; p
< buf_end
; p
++)
70 u32
*prom_get_cp1_base(void)
75 u32
prom_get_cp1_size(void)
84 char **argv
= (char **) fw_arg1
;
85 char **envp
= (char **) fw_arg2
;
90 mips_machtype
= MACH_INFINEON_IFXMIPS
;
92 argv
= (char**)KSEG1ADDR((unsigned long)argv
);
93 arcs_cmdline
[0] = '\0';
94 for(i
= 1; i
< argc
; i
++)
96 char *a
= (char*)KSEG1ADDR(argv
[i
]);
99 if(strlen(arcs_cmdline
) + strlen(a
+ 1) >= sizeof(arcs_cmdline
))
101 strcat(arcs_cmdline
, a
);
102 strcat(arcs_cmdline
, " ");
105 envp
= (char**)KSEG1ADDR((unsigned long)envp
);
108 char *e
= (char*)KSEG1ADDR(*envp
);
110 if(!strncmp(e
, "memsize=", 8))
113 memsize
= simple_strtoul(e
, NULL
, 10);
119 memsize
-= prom_cp1_size
;
120 prom_cp1_base
= (u32
*)(0xA0000000 + (memsize
* 1024 * 1024));
122 prom_printf(KERN_INFO
"Using %dMB Ram and reserving %dMB for cp1\n", memsize
, prom_cp1_size
);
123 memsize
*= 1024 * 1024;
126 strcpy(&(arcs_cmdline
[0]), "console=ttyS0,115200 rootfstype=squashfs,jffs2 init=/etc/preinit");
128 add_memory_region(0x00000000, memsize
, BOOT_MEM_RAM
);