1 /*****************************************************************************
2 * Carsten Langgaard, carstenl@mips.com
3 * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
4 * Copyright (C) 2003 ADMtek Incorporated.
5 * daniell@admtek.com.tw
6 * Copyright (C) 2007 OpenWrt.org
8 * This program is free software; you can distribute it and/or modify it
9 * under the terms of the GNU General Public License (Version 2) as
10 * published by the Free Software Foundation.
12 * This program is distributed in the hope it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
21 *****************************************************************************/
23 #include <linux/init.h>
24 #include <linux/autoconf.h>
25 #include <linux/kernel.h>
26 #include <linux/string.h>
28 #include <linux/bootmem.h>
30 #include <asm/bootinfo.h>
31 #include <asm/addrspace.h>
33 #include <asm/mach-adm5120/adm5120_info.h>
35 static char **prom_envp
= NULL
;
37 void setup_prom_printf(int);
38 void prom_printf(char *, ...);
39 void prom_meminit(void);
42 #define READCSR(r) *(volatile unsigned long *)(0xB2600000+(r))
43 #define WRITECSR(r,v) *(volatile unsigned long *)(0xB2600000+(r)) = v
45 #define UART_DR_REG 0x00
46 #define UART_FR_REG 0x18
47 #define UART_TX_FIFO_FULL 0x20
49 int putPromChar(char c
)
51 WRITECSR(UART_DR_REG
, c
);
52 while ( (READCSR(UART_FR_REG
) & UART_TX_FIFO_FULL
) );
57 * Ugly prom_printf used for debugging
60 void prom_printf(char *fmt
, ...)
68 l
= vsprintf(buf
, fmt
, args
); /* hopefully i < sizeof(buf) */
73 for (p
= buf
; p
< buf_end
; p
++) {
74 /* Crude cr/nl handling is better than none */
81 char *prom_getenv(char *envname
)
91 for (env
= prom_envp
; *env
!= NULL
; env
++) {
92 if (strcmp(envname
, *env
++) == 0) {
101 extern char _image_cmdline
;
103 * initialize the prom module.
105 void __init
prom_init(void)
109 if ((fw_arg2
& 3) == 0) {
110 prom_envp
= (char **)fw_arg2
;
115 /* you should these macros defined in include/asm/bootinfo.h */
116 mips_machgroup
= MACH_GROUP_ADM5120
;
117 mips_machtype
= adm5120_board
.mach_type
;
119 /* init command line, register a default kernel command line */
120 cmd
= &_image_cmdline
+ 8;
121 if( strlen(cmd
) > 0) strcpy( &(arcs_cmdline
[0]), cmd
);
122 else strcpy(&(arcs_cmdline
[0]), CONFIG_CMDLINE
);
124 /* init memory map */
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