tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Common code used by all Alchemy develboards.
3 *
4 * Extracted from files which had this to say:
5 *
6 * Copyright 2000, 2008 MontaVista Software Inc.
7 * Author: MontaVista Software, Inc. <source@mvista.com>
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
13 *
14 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
15 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
16 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
17 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
20 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
21 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 *
25 * You should have received a copy of the GNU General Public License along
26 * with this program; if not, write to the Free Software Foundation, Inc.,
27 * 675 Mass Ave, Cambridge, MA 02139, USA.
28 */
29
30#include <linux/init.h>
31#include <linux/kernel.h>
32#include <asm/bootinfo.h>
33#include <asm/mach-au1x00/au1000.h>
34#include <prom.h>
35
36#if defined(CONFIG_MIPS_DB1000) || \
37 defined(CONFIG_MIPS_PB1100) || \
38 defined(CONFIG_MIPS_PB1500)
39#define ALCHEMY_BOARD_DEFAULT_MEMSIZE 0x04000000
40
41#else /* Au1550/Au1200-based develboards */
42#define ALCHEMY_BOARD_DEFAULT_MEMSIZE 0x08000000
43#endif
44
45void __init prom_init(void)
46{
47 unsigned char *memsize_str;
48 unsigned long memsize;
49
50 prom_argc = (int)fw_arg0;
51 prom_argv = (char **)fw_arg1;
52 prom_envp = (char **)fw_arg2;
53
54 prom_init_cmdline();
55 memsize_str = prom_getenv("memsize");
56 if (!memsize_str || strict_strtoul(memsize_str, 0, &memsize))
57 memsize = ALCHEMY_BOARD_DEFAULT_MEMSIZE;
58
59 add_memory_region(0, memsize, BOOT_MEM_RAM);
60}
61
62void prom_putchar(unsigned char c)
63{
64#ifdef CONFIG_MIPS_DB1300
65 alchemy_uart_putchar(AU1300_UART2_PHYS_ADDR, c);
66#else
67 alchemy_uart_putchar(AU1000_UART0_PHYS_ADDR, c);
68#endif
69}