3 * BRIEF MODULE DESCRIPTION
4 * PROM library initialisation code, supports YAMON and U-Boot.
6 * Copyright 2000, 2001, 2006 MontaVista Software Inc.
7 * Author: MontaVista Software, Inc.
8 * ppopov@mvista.com or source@mvista.com
10 * This file was derived from Carsten Langgaard's
11 * arch/mips/mips-boards/xx files.
13 * Carsten Langgaard, carstenl@mips.com
14 * Copyright (C) 1999,2000 MIPS Technologies, Inc. All rights reserved.
16 * This program is free software; you can redistribute it and/or modify it
17 * under the terms of the GNU General Public License as published by the
18 * Free Software Foundation; either version 2 of the License, or (at your
19 * option) any later version.
21 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
24 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
27 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
28 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 * You should have received a copy of the GNU General Public License along
33 * with this program; if not, write to the Free Software Foundation, Inc.,
34 * 675 Mass Ave, Cambridge, MA 02139, USA.
37 #include <linux/module.h>
38 #include <linux/kernel.h>
39 #include <linux/init.h>
40 #include <linux/string.h>
42 #include <asm/bootinfo.h>
43 #include <asm/mach-jz4740/regs.h>
45 /* #define DEBUG_CMDLINE */
48 char **prom_argv
, **prom_envp
;
50 char *prom_getcmdline(void)
52 return &(arcs_cmdline
[0]);
55 void prom_init_cmdline(void)
60 cp
= &(arcs_cmdline
[0]);
61 while(i
< prom_argc
) {
75 void __init
prom_init(void)
77 unsigned long memsize
;
79 prom_argc
= (int) fw_arg0
;
80 prom_argv
= (char **) fw_arg1
;
81 prom_envp
= (char **) fw_arg2
;
83 mips_machtype
= MACH_INGENIC_JZ4740
;
87 add_memory_region(0, memsize
, BOOT_MEM_RAM
);
90 void __init
prom_free_prom_memory(void)
94 /* used by early printk */
95 void prom_putchar(char c
)
97 volatile u8
*uart_lsr
= (volatile u8
*)(UART0_BASE
+ OFF_LSR
);
98 volatile u8
*uart_tdr
= (volatile u8
*)(UART0_BASE
+ OFF_TDR
);
100 /* Wait for fifo to shift out some bytes */
101 while ( !((*uart_lsr
& (UARTLSR_TDRQ
| UARTLSR_TEMT
)) == 0x60) );
106 const char *get_system_type(void)
111 EXPORT_SYMBOL(prom_getcmdline
);
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